What helped me diagnose the issue was to run mongod and specify the /etc/mondgob.conf config file:

mongod --config /etc/mongodb.conf

That revealed that some options in /etc/mongdb.conf were "Unrecognized". I had commented out both options under security: and left alone only security: on one line, which caused the service to not start. This looks like a bug.

security:
#  authorization: enabled
#  keyFile: /etc/ssl/mongo-keyfile

^^ error

#security:
#  authorization: enabled
#  keyFile: /etc/ssl/mongo-keyfile

^^ correctly commented.

When you typed in the mongod command, did you also give it a path? This is usually the issue. You don't have to bother with the conf file. simply type

mongod --dbpath="put your path to where you want it to save the working area for your database here!! without these silly quotations marks I may also add!"

example: mongod --dbpath=C:/Users/kyles2/Desktop/DEV/mongodb/data

That is my path and don't forget if on windows to flip the slashes forward if you copied it from the or it won't work!

To convert int32 to string in mongo without creating an array just add "" to your number :-)

db.foo.find( { 'mynum' : { $type : 16 } } ).forEach( function (x) {   
  x.mynum = x.mynum + ""; // convert int32 to string
  db.foo.save(x);
});

An easy way to do that is to use the following:

var John = people.findOne({name: "John"});
John.friends.push({firstName: "Harry", lastName: "Potter"});
John.save();

Start mongod server first

mongod

Open another terminal window

Start mongo shell

mongo

I encountered the same issue and all I had to do was to place the Application in a package one level higher than the service, dao and domain packages.

I'm the maintainer of Mongoose. The more modern way to upsert a doc is to use the Model.updateOne() function.

await Contact.updateOne({
    phone: request.phone
}, { status: request.status }, { upsert: true });

If you need the upserted doc, you can use Model.findOneAndUpdate()

const doc = await Contact.findOneAndUpdate({
    phone: request.phone
}, { status: request.status }, { upsert: true });

The key takeaway is that you need to put the unique properties in the filter parameter to updateOne() or findOneAndUpdate(), and the other properties in the update parameter.

Here's a tutorial on upserting documents with Mongoose.

I followed the official MongoDB documentation for stopping with signals. One of the following commands can be used (PID represents the Process ID of the mongod process):

kill PID

which sends signal 15 (SIGTERM), or

kill -2 PID

which sends signal 2 (SIGINT).

Warning from MongoDB documentation:
Never use kill -9 (i.e. SIGKILL) to terminate a mongod instance.

If you have more than one instance running or you don't care about the PID, you could use pkill to send the signal to all running mongod processes:

pkill mongod

or

pkill -2 mongod

or, much more safer, only to the processes belonging to you:

pkill -U $USER mongod

or

pkill -2 -U $USER mongod

NOTE: If the DB is running as another user, but you have administrative rights, you have invoke the above commands with sudo, in order to run them. E.g.:

sudo pkill mongod
sudo pkill -2 mongod

PS
Note: I resorted to this option, because mongod --shutdown, although mentioned in the current MongoDB documentation, curiously doesn't work on my machine (macOS, mongodb v3.4.10, installed with homebrew):
Error parsing command line: unrecognised option '--shutdown'

PPS
(macOS specific) Before anyone wonders: no, I could not stop it with command
brew services stop mongodb
because I did not start it with
brew services start mongodb.
I had started mongod with a custom command line :-)

Here is what I did, hope it is helpful to anyone else :

Steps:

1. Stop your services that are using mongodb
2. Stop mongod - my way of doing this was with my rc file /etc/rc.d/rc.mongod stop, if you use something else, like systemd you should check your documentation how to do that
3. Create a new directory on the fresh harddisk - mkdir /mnt/database
4. Make sure that mongodb has privileges to read / write from that directory ( usually chown mongodb:mongodb -R /mnt/database/mongodb ) - thanks @DanailGabenski.
5. Copy the data folder of your mongodb to the new location - cp -R /var/lib/mongodb/ /mnt/database/
6. Remove the old database folder - rm -rf /var/lib/mongodb/
7. Create symbolic link to the new database folder - ln -s /mnt/database/mongodb /var/lib/mongodb
8. Start mongod - /etc/rc.d/rc.mongod start
9. Check the log of your mongod and do some sanity checking ( try mongo to connect to your database to see if everything is all right )
10. Start your services that you stopped in point 1

There is no need to tell that you should be careful when you do this, especialy with rm -rf but I think this is the best way to do it.

You should never try to copy database dir while mongod is running, because there might be services that write / read from it which will change the content of your database.

Below command worked for me

mongoimport --db test --collection docs --file example2.json

when i removed the extra newline character before Email attribute in each of the documents.

example2.json

{"FirstName": "Bruce", "LastName": "Wayne", "Email": "[email protected]"}
{"FirstName": "Lucius", "LastName": "Fox", "Email": "[email protected]"}
{"FirstName": "Dick", "LastName": "Grayson", "Email": "[email protected]"}

You can use mongod command instead of mongodb, if you find any issue regarding dbpath in mongo you can use my answer in the link below.

https://stackoverflow.com/a/53057695/8247133

It looks like you can set isPartialObject which might accomplish what you want.

If you don't want to group, then use the following method:

db.collection.aggregate( [ { $match : { score : { $gt : 70, $lte : 90 } } }, { $count: 'count' } ] );

Step by Step Solution for windows 32 bit

1. Download msi file for windows 32 bit.
2. Double click Install it, choose custom and browse the location where ever you have to install(personally i have create the mongodb folder in E drive and install it there).
3. Ok,now you have to create the data\db two folder where ever create it, i've created it in installed location root e.g on E:\
4. Now link the mongod to these folder for storing data use this command or modify according to your requirement go to using cmd E:\mongodb\bin and after that write in console mongod --dbpath E:\data it will link.
5. Now navigate to E:\mongodb\bin and write mongod using cmd.
6. Open another cmd by right click and run as admin point to your monogodb installed directory and then to bin just like E:\mongodb\bin and write this mongo.exe
7. Next - write db.test.save({Field:'Hello mongodb'}) this command will insert the a field having name Field and its value Hello mongodb.
8. Next, check the record db.test.find() and press enter you will find the record that you have recently entered.

A shorter way than using second parameter for the callback of collection.insert would be using objectToInsert._id that returns the _id (inside of the callback function, supposing it was a successful operation).

The Mongo driver for NodeJS appends the _id field to the original object reference, so it's easy to get the inserted id using the original object:

collection.insert(objectToInsert, function(err){
   if (err) return;
   // Object inserted successfully.
   var objectId = objectToInsert._id; // this will return the id of object inserted
});

I suggest the following to make sure everything is uninstalled:

sudo apt-get purge mongodb mongodb-clients mongodb-server mongodb-dev

sudo apt-get purge mongodb-10gen

sudo apt-get autoremove

This should also remove your config from

 /etc/mongodb.conf.

If you want to clean up completely and you might also want to remove the data directory

/var/lib/mongodb

putting backslash "/" at the end of path to bin of mongodb solved my problem.

In addition to previously provided answers, one option is to follow the 'localhost exception' approach to create the first user if your db is already started with access control (--auth switch). In order to do that, you need to have localhost access to the server and then run:

mongo
use admin
db.createUser(
 {
     user: "user_name",
     pwd: "user_pass",
     roles: [
           { role: "userAdminAnyDatabase", db: "admin" },
           { role: "readWriteAnyDatabase", db: "admin" },
           { role: "dbAdminAnyDatabase", db: "admin" }
        ]
 })

As stated in MongoDB documentation:

The localhost exception allows you to enable access control and then create the first user in the system. With the localhost exception, after you enable access control, connect to the localhost interface and create the first user in the admin database. The first user must have privileges to create other users, such as a user with the userAdmin or userAdminAnyDatabase role. Connections using the localhost exception only have access to create the first user on the admin database.

Here is the link to that section of the docs.

I'm probably going to be an odd man out, but I think you need to stay with MySQL. You haven't described a real problem you need to solve, and MySQL/InnoDB is an excellent storage back-end even for blob/json data.

There is a common trick among Web engineers to try to use more NoSQL as soon as realization comes that not all features of an RDBMS are used. This alone is not a good reason, since most often NoSQL databases have rather poor data engines (what MySQL calls a storage engine).

Now, if you're not of that kind, then please specify what is missing in MySQL and you're looking for in a different database (like, auto-sharding, automatic failover, multi-master replication, a weaker data consistency guarantee in cluster paying off in higher write throughput, etc).

Not so much an answer but more of an FYI:I've just hit this and found this question as a result of searching. Here is the details of my experience:

Shell error

markdsievers@ip-xx-xx-xx-xx:~$ mongo
MongoDB shell version: 2.0.1
connecting to: test
Wed Dec 21 03:36:13 Socket recv() errno:104 Connection reset by peer 127.0.0.1:27017
Wed Dec 21 03:36:13 SocketException: remote: 127.0.0.1:27017 error: 9001 socket exception [1] server [127.0.0.1:27017] 
Wed Dec 21 03:36:13 DBClientCursor::init call() failed
Wed Dec 21 03:36:13 Error: Error during mongo startup. :: caused by :: DBClientBase::findN: transport error: 127.0.0.1 query: { whatsmyuri: 1 } shell/mongo.js:84
exception: connect failed

Mongo logs reveal

Wed Dec 21 03:35:04 [initandlisten] connection accepted from 127.0.0.1:50273 #6612
Wed Dec 21 03:35:04 [initandlisten] connection refused because too many open connections: 819

This perhaps indicates the other answer (JaKi) was experiencing the same thing, where some connections were purged and access made possible again for the shell (other clients)

I don't know if this might be helpful, but when I did this it worked:

Command mongo in terminal.

Then I copied the URL which mongo command returns, something like

mongodb://127.0.0.1:*port*

I replaced the URL with this in my JS code.

db.users.count()
db.users.remove({})
db.users.count()

Starting with MongoDB 3.4, the recommended way to perform fast case-insensitive searches is to use a Case Insensitive Index.

I personally emailed one of the founders to please get this working, and he made it happen! It was an issue on JIRA since 2009, and many have requested the feature. Here's how it works:

A case-insensitive index is made by specifying a collation with a strength of either 1 or 2. You can create a case-insensitive index like this:

db.cities.createIndex(
  { city: 1 },
  { 
    collation: {
      locale: 'en',
      strength: 2
    }
  }
);

You can also specify a default collation per collection when you create them:

db.createCollection('cities', { collation: { locale: 'en', strength: 2 } } );

In either case, in order to use the case-insensitive index, you need to specify the same collation in the find operation that was used when creating the index or the collection:

db.cities.find(
  { city: 'new york' }
).collation(
  { locale: 'en', strength: 2 }
);

This will return "New York", "new york", "New york" etc.

Other notes

• The answers suggesting to use full-text search are wrong in this case (and potentially dangerous). The question was about making a case-insensitive query, e.g. username: 'bill' matching BILL or Bill, not a full-text search query, which would also match stemmed words of bill, such as Bills, billed etc.

• The answers suggesting to use regular expressions are slow, because even with indexes, the documentation states:

  "Case insensitive regular expression queries generally cannot use indexes effectively. The $regex implementation is not collation-aware and is unable to utilize case-insensitive indexes."

  $regex answers also run the risk of user input injection.

To remove all array elements irrespective of any given id, use this:

collection.update(
  { },
  { $pull: { 'contact.phone': { number: '+1786543589455' } } }
);

If you take a look at:

• https://github.com/docker-library/mongo/blob/master/4.2/Dockerfile
• https://github.com/docker-library/mongo/blob/master/4.2/docker-entrypoint.sh#L303-L313

you will notice that there are two variables used in the docker-entrypoint.sh:

• MONGO_INITDB_ROOT_USERNAME
• MONGO_INITDB_ROOT_PASSWORD

You can use them to setup root user. For example you can use following docker-compose.yml file:

mongo-container:
  image: mongo:3.4.2
  environment:
      # provide your credentials here
      - MONGO_INITDB_ROOT_USERNAME=root
      - MONGO_INITDB_ROOT_PASSWORD=rootPassXXX
  ports:
    - "27017:27017"
  volumes:
      # if you wish to setup additional user accounts specific per DB or with different roles you can use following entry point
    - "$PWD/mongo-entrypoint/:/docker-entrypoint-initdb.d/"
  # no --auth is needed here as presence of username and password add this option automatically
  command: mongod

Now when starting the container by docker-compose up you should notice following entries:

...
I CONTROL  [initandlisten] options: { net: { bindIp: "127.0.0.1" }, processManagement: { fork: true }, security: { authorization: "enabled" }, systemLog: { destination: "file", path: "/proc/1/fd/1" } }
...
I ACCESS   [conn1] note: no users configured in admin.system.users, allowing localhost access
...
Successfully added user: {
    "user" : "root",
    "roles" : [
        {
            "role" : "root",
            "db" : "admin"
        }
    ]
}

To add custom users apart of root use the entrypoint exectuable script (placed under $PWD/mongo-entrypoint dir as it is mounted in docker-compose to entrypoint):

#!/usr/bin/env bash
echo "Creating mongo users..."
mongo admin --host localhost -u USER_PREVIOUSLY_DEFINED -p PASS_YOU_PREVIOUSLY_DEFINED --eval "db.createUser({user: 'ANOTHER_USER', pwd: 'PASS', roles: [{role: 'readWrite', db: 'xxx'}]}); db.createUser({user: 'admin', pwd: 'PASS', roles: [{role: 'userAdminAnyDatabase', db: 'admin'}]});"
echo "Mongo users created."

Entrypoint script will be executed and additional users will be created.

Use $elemMatch to find the array of particular object

db.users.findOne({"_id": id},{awards: {$elemMatch: {award:'Turing Award', year:1977}}})

There is a mongoose way for doing it.

const itemId = 2;
const query = {
  item._id: itemId 
};
Person.findOne(query).then(doc => {
  item = doc.items.id(itemId );
  item["name"] = "new name";
  item["value"] = "new value";
  doc.save();

  //sent respnse to client
}).catch(err => {
  console.log('Oh! Dark')
});

You can use MongoDB_DataObject wrapper to perform such query like below:

$model = new MongoDB_DataObject('orders');

$model->whereAdd('MONTH(created) = 4 AND YEAR(created) = 2016');

$model->find();

while ($model->fetch()) {
    var_dump($model);
}

OR, similarly, using direct query string:

$model = new MongoDB_DataObject();

$model->query('SELECT * FROM orders WHERE MONTH(created) = 4 AND YEAR(created) = 2016');

while ($model->fetch()) {
    var_dump($model);
}

The way i fix this problem is transforming the id into a string

i like it fancy with backtick: `${id}`

this should fix the problem with no overhead

This can be done with cgroups, by combining knowledge from these two articles: https://www.percona.com/blog/2015/07/01/using-cgroups-to-limit-mysql-and-mongodb-memory-usage/
http://frank2.net/cgroups-ubuntu-14-04/

You can find here a small shell script which will create config and init files for Ubuntu 14.04: http://brainsuckerna.blogspot.com.by/2016/05/limiting-mongodb-memory-usage-with.html

Just like that:

sudo bash -c 'curl -o- http://brains.by/misc/mongodb_memory_limit_ubuntu1404.sh | bash'

To resolve the issue in Windows, the below steps work for me:

For example mongoDB version 3.6 is installed, and the install path of MongoDB is "D:\Program Files\MongoDB".

Create folder D:\mongodb\logs, then create file mongodb.log inside this folder.

Run cmd.exe as administrator,

D:\Program Files\MongoDB\Server\3.6\bin>taskkill /F /IM mongod.exe
D:\Program Files\MongoDB\Server\3.6\bin>mongod.exe --logpath D:\mongodb\logs\mongodb.log --logappend --dbpath D:\mongodb\data --directoryperdb --serviceName MongoDB --remove
D:\Program Files\MongoDB\Server\3.6\bin>mongod --logpath "D:\mongodb\logs\mongodb.log" --logappend --dbpath "D:\mongodb\data" --directoryperdb --serviceName "MongoDB" --serviceDisplayName "MongoDB" --install

Remove these two files mongod.lock and storage.bson under the folder "D:\mongodb\data".

Then type net start MongoDB in the cmd using administrator privilege, the issue will be solved.

Model.create() vs Model.collection.insert(): a faster approach

Model.create() is a bad way to do inserts if you are dealing with a very large bulk. It will be very slow. In that case you should use Model.collection.insert, which performs much better. Depending on the size of the bulk, Model.create() will even crash! Tried with a million documents, no luck. Using Model.collection.insert it took just a few seconds.

Model.collection.insert(docs, options, callback)

• docs is the array of documents to be inserted;
• options is an optional configuration object - see the docs
• callback(err, docs) will be called after all documents get saved or an error occurs. On success, docs is the array of persisted documents.

As Mongoose's author points out here, this method will bypass any validation procedures and access the Mongo driver directly. It's a trade-off you have to make since you're handling a large amount of data, otherwise you wouldn't be able to insert it to your database at all (remember we're talking hundreds of thousands of documents here).

A simple example

var Potato = mongoose.model('Potato', PotatoSchema);

var potatoBag = [/* a humongous amount of potato objects */];

Potato.collection.insert(potatoBag, onInsert);

function onInsert(err, docs) {
    if (err) {
        // TODO: handle error
    } else {
        console.info('%d potatoes were successfully stored.', docs.length);
    }
}

Update 2019-06-22: although insert() can still be used just fine, it's been deprecated in favor of insertMany(). The parameters are exactly the same, so you can just use it as a drop-in replacement and everything should work just fine (well, the return value is a bit different, but you're probably not using it anyway).

Reference

• Mongo documentation
• Aaron Heckman on Google Groups discussing bulk inserts

first get the ObjectID function from the mongodb ObjectId = require(mongodb).ObjectID;

then you can call the _id with the delete function

"_id" : ObjectId("4d5192665777000000005490")

In a maven project create a file src/main/resources/application.yml with the following content:

spring.profiles: integration
# use local or embedded mongodb at localhost:27017
---
spring.profiles: production
spring.data.mongodb.uri: mongodb://<user>:<passwd>@<host>:<port>/<dbname>

Spring Boot will automatically use this file to configure your application. Then you can start your spring boot application either with the integration profile (and use your local MongoDB)

java -jar -Dspring.profiles.active=integration your-app.jar

or with the production profile (and use your production MongoDB)

java -jar -Dspring.profiles.active=production your-app.jar

Mongoose maintainer here. You need to set the new option to true (or, equivalently, returnOriginal to false)

await User.findOneAndUpdate(filter, update, { new: true });

// Equivalent
await User.findOneAndUpdate(filter, update, { returnOriginal: false });

See Mongoose findOneAndUpdate() docs and this tutorial on updating documents in Mongoose.

You can just use

db.serverStatus().connections

Also, this function can help you spot the IP addresses connected to your Mongo DB

db.currentOp(true).inprog.forEach(function(x) { print(x.client) })

Actually, the default directory where the mongod instance stores its data is

/data/db on Linux and OS X,

\data\db on Windows

To check the same, you can look for dbPath settings in mongodb configuration file.

• On Linux, the location is /etc/mongod.conf, if you have used package manager to install MongoDB. Run the following command to check the specified directory:

  grep dbpath /etc/mongodb.conf
  

• On Windows, the location is <install directory>/bin/mongod.cfg. Open mongod.cfg file and check for dbPath option.
• On macOS, the location is /usr/local/etc/mongod.conf when installing from MongoDB’s official Homebrew tap.

The default mongod.conf configuration file included with package manager installations uses the following platform-specific default values for storage.dbPath:

+--------------------------+-----------------+------------------------+
|         Platform         | Package Manager | Default storage.dbPath |
+--------------------------+-----------------+------------------------+
| RHEL / CentOS and Amazon | yum             | /var/lib/mongo         |
| SUSE                     | zypper          | /var/lib/mongo         |
| Ubuntu and Debian        | apt             | /var/lib/mongodb       |
| macOS                    | brew            | /usr/local/var/mongodb |
+--------------------------+-----------------+------------------------+

The storage.dbPath setting in the configuration file is available only for mongod.

The Linux package init scripts do not expect storage.dbPath to change from the defaults. If you use the Linux packages and change storage.dbPath, you will have to use your own init scripts and disable the built-in scripts.

Source

As answer by Neodan mongoexport is quite useful with -q option for query. It also convert ObjectId to standard format of JSON "$oid". E.g:

mongoexport -d yourdb -c yourcol --jsonArray --pretty -q '{"field": "filter value"}' -o output.json

Just thought I'd update in-case anyone stumbles across this page in the future. As of 1.5.3, mongo now supports a real $or operator: http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%24or

Your query of "(expires >= Now()) OR (expires IS NULL)" can now be rendered as:

{$or: [{expires: {$gte: new Date()}}, {expires: null}]}

The best superuser role would be the root.The Syntax is:

use admin

db.createUser(
{
    user: "root",
    pwd: "password",
    roles: [ "root" ]
})

For more details look at built-in roles.

Hope this helps !!!

It looks like Mongo v1.9+ has support for the compact in place!

> db.runCommand( { compact : 'mycollectionname' } )

See the docs here: http://docs.mongodb.org/manual/reference/command/compact/

"Unlike repairDatabase, the compact command does not require double disk space to do its work. It does require a small amount of additional space while working. Additionally, compact is faster."

https://docs.mongodb.com/manual/reference/sql-comparison/

http://php.net/manual/en/mongo.sqltomongo.php

MySQL

SELECT * FROM users WHERE username LIKE "%Son%"

MongoDB

db.users.find({username:/Son/})

I followed the db.dropDatabase() route for a long time, however if you're trying to use this for wiping the database in between test cases you may eventually find problems with index constraints not being honored after the database drop. As a result, you'll either need to mess about with ensureIndexes, or a simpler route would be avoiding the dropDatabase alltogether and just removing from each collection in a loop such as:

db.getCollectionNames().forEach(
  function(collection_name) {
    db[collection_name].remove()
  }
);

In my case I was running this from the command-line using:

mongo [database] --eval "db.getCollectionNames().forEach(function(n){db[n].remove()});"

If you are currently using the MongoDB 3.3 Repository (as officially currently suggested by MongoDB website) you should take in consideration that the package name used for version 3.3 is:

mongodb-org-unstable

Then the proper installation command for this version will be:

sudo apt-get install -y mongodb-org-unstable

Considering this, I will rather suggest to use the current latest stable version (v3.2) until the v3.3 becomes stable, the commands to install it are listed below:

Download the v3.2 Repository key:

wget -qO - https://www.mongodb.org/static/pgp/server-3.2.asc | sudo apt-key add -

If you work with Ubuntu 12.04 or Mint 13 add the following repository:

echo "deb http://repo.mongodb.org/apt/ubuntu precise/mongodb-org/3.2 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.2.list

If you work with Ubuntu 14.04 or Mint 17 add the following repository:

echo "deb http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.2 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.2.list

If you work with Ubuntu 16.04 or Mint 18 add the following repository:

echo "deb http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.2 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.2.list

Update the package list and install mongo:

sudo apt-get update
sudo apt-get install -y mongodb-org

Using aggregate function like below :

[
{$group: {_id : {book : '$book',address:'$addr'}, total:{$sum :1}}},
{$project : {book : '$_id.book', address : '$_id.address', total : '$total', _id : 0}}
]

it will give you result like following :

        {
            "total" : 1,
            "book" : "book33",
            "address" : "address90"
        }, 
        {
            "total" : 1,
            "book" : "book5",
            "address" : "address1"
        }, 
        {
            "total" : 1,
            "book" : "book99",
            "address" : "address9"
        }, 
        {
            "total" : 1,
            "book" : "book1",
            "address" : "address5"
        }, 
        {
            "total" : 1,
            "book" : "book5",
            "address" : "address2"
        }, 
        {
            "total" : 1,
            "book" : "book3",
            "address" : "address4"
        }, 
        {
            "total" : 1,
            "book" : "book11",
            "address" : "address77"
        }, 
        {
            "total" : 1,
            "book" : "book9",
            "address" : "address3"
        }, 
        {
            "total" : 1,
            "book" : "book1",
            "address" : "address15"
        }, 
        {
            "total" : 2,
            "book" : "book1",
            "address" : "address2"
        }, 
        {
            "total" : 3,
            "book" : "book1",
            "address" : "address1"
        }

I didn't quite get your expected result format, so feel free to modify this to one you need.

In my opinion the best approach to achieve this by using the filter method as it's meaningless to return in a forEach block; for an example on your snippet:

// Fetch all objects in SomeElements collection
var elementsCollection = SomeElements.find();
elementsCollection
.filter(function(element) {
  return element.shouldBeProcessed;
})
.forEach(function(element){
  doSomeLengthyOperation();
});

This will narrow down your elementsCollection and just keep the filtred elements that should be processed.

I'd suggest adding a random int field to each object. Then you can just do a

findOne({random_field: {$gte: rand()}}) 

to pick a random document. Just make sure you ensureIndex({random_field:1})

• One way to find the result as with equivalent to like query

db.collection.find({name:{'$regex' : 'string', '$options' : 'i'}})

Where i use for cases insensitive fetch data

• Another way by which we can get result also

db.collection.find({"name":/aus/}) 

Above will provide the result which have the aus in name cantaing aus.

Since mongo 3.6 you can use 'change stream': https://emptysqua.re/blog/driver-features-for-mongodb-3-6/#change-streams

To use it you need to create a change stream object by the 'watch' query, and for each change, you can do whatever you want...

python solution:

def update_at_by(change):
    update_fields = change["updateDescription"]["updatedFields"].keys()
    print("update_fields: {}".format(update_fields))

    collection = change["ns"]["coll"]
    db = change["ns"]["db"]
    key = change["documentKey"]

    if len(update_fields) == 1 and "update_at" in update_fields:
        pass  # to avoid recursion updates...
    else:
        client[db][collection].update(key, {"$set": {"update_at": datetime.now()}})


client = MongoClient("172.17.0.2")
db = client["Data"]

change_stream = db.watch()

for change in change_stream:
    print(change)
    update_ts_by(change)

Note, to use the change_stream object, your mongodb instance should run as 'replica set'. It can be done also as a 1-node replica set (almost no change then the standalone use):

Run mongo as a replica set: https://docs.mongodb.com/manual/tutorial/convert-standalone-to-replica-set/

Replica set configuration vs Standalone: Mongo DB - difference between standalone & 1-node replica set

There is an awesome set of services available called MongoDB Stitch. Look into stitch functions/triggers. Note this is a cloud-based paid service (AWS). In your case, on an insert, you could call a custom function written in javascript.

[edit based on this now being possible in recent versions]

[Updated Answer] You can query the following way to get back the name of class and the student id only if they are already enrolled.

db.student.find({},
 {_id:0, name:1, students:{$elemMatch:{$eq:ObjectId("51780f796ec4051a536015cf")}}})

and you will get back what you expected:

{ "name" : "CS 101", "students" : [ ObjectId("51780f796ec4051a536015cf") ] }
{ "name" : "Literature" }
{ "name" : "Physics", "students" : [ ObjectId("51780f796ec4051a536015cf") ] }

[Original Answer] It's not possible to do what you want to do currently. This is unfortunate because you would be able to do this if the student was stored in the array as an object. In fact, I'm a little surprised you are using just ObjectId() as that will always require you to look up the students if you want to display a list of students enrolled in a particular course (look up list of Id's first then look up names in the students collection - two queries instead of one!)

If you were storing (as an example) an Id and name in the course array like this:

{
        "_id" : ObjectId("51780fb5c9c41825e3e21fc6"),
        "name" : "Physics",
        "students" : [
                {id: ObjectId("51780f796ec4051a536015cf"), name: "John"},
                {id: ObjectId("51780f796ec4051a536015d0"), name: "Sam"}
        ]
}

Your query then would simply be:

db.course.find( { }, 
                { students : 
                    { $elemMatch : 
                       { id : ObjectId("51780f796ec4051a536015d0"), 
                         name : "Sam" 
                       } 
                    } 
                } 
);

If that student was only enrolled in CS 101 you'd get back:

{ "name" : "Literature" }
{ "name" : "Physics" }
{
    "name" : "CS 101",
    "students" : [
        {
            "id" : ObjectId("51780f796ec4051a536015cf"),
            "name" : "John"
        }
    ]
}

The fact that mongoDB is not relational have led some people to consider it useless. I think that you should know what you are doing before designing a DB. If you choose to use noSQL DB such as MongoDB, you better implement a schema. This will make your collections - more or less - resemble tables in SQL databases. Also, avoid denormalization (embedding), unless necessary for efficiency reasons.

If you want to design your own noSQL database, I suggest to have a look on Firebase documentation. If you understand how they organize the data for their service, you can easily design a similar pattern for yours.

As others pointed out, you will have to do the joins client-side, except with Meteor (a Javascript framework), you can do your joins server-side with this package (I don't know of other framework which enables you to do so). However, I suggest you read this article before deciding to go with this choice.

Edit 28.04.17: Recently Firebase published this excellent series on designing noSql Databases. They also highlighted in one of the episodes the reasons to avoid joins and how to get around such scenarios by denormalizing your database.

Something I did recently, hope it helps. I have a list of dictionaries and wanted to add a value to some existing documents.

for item in my_list:
    my_collection.update({"_id" : item[key] }, {"$set" : {"New_col_name" :item[value]}})

Another way to do this is:

mongo mongodb://mongoDbIPorDomain:port

You can find the ObjectId constructor on require('mongoose').Types. Here is an example:

var mongoose = require('mongoose');
var id = mongoose.Types.ObjectId();

id is a newly generated ObjectId.

You can read more about the Types object at Mongoose#Types documentation.

docs is an array of documents. so it doesn't have a mongooseModel.remove() method.

You can iterate and remove each document in the array separately.

Or - since it looks like you are finding the documents by a (probably) unique id - use findOne instead of find.

I'm using mongojs, and i have this example:

db.users.findOne({'_id': db.ObjectId(user_id)  }, function(err, user) {
   if(err == null && user != null){
      user._id.toHexString(); // I convert the objectId Using toHexString function.
   }
})

I hope this help.

You might want to consider using console.log with the built-in "arguments" object:

console.log(arguments); // would have shown you [0] null, [1] yourResult

This will always output all of your arguments, no matter how many arguments you have.

You probably need to continue running your DB process (by running mongod) while running your node server.

Here is a full file demo of express server!

https://gist.github.com/xgqfrms-GitHub/7697d5975bdffe8d474ac19ef906e906

hope it will help for you!

// simple express server for HTML pages!_x000D_
// ES6 style_x000D_
_x000D_
const express = require('express');_x000D_
const fs = require('fs');_x000D_
const hostname = '127.0.0.1';_x000D_
const port = 3000;_x000D_
const app = express();_x000D_
_x000D_
let cache = [];// Array is OK!_x000D_
cache[0] = fs.readFileSync( __dirname + '/index.html');_x000D_
cache[1] = fs.readFileSync( __dirname + '/views/testview.html');_x000D_
_x000D_
app.get('/', (req, res) => {_x000D_
    res.setHeader('Content-Type', 'text/html');_x000D_
    res.send( cache[0] );_x000D_
});_x000D_
_x000D_
app.get('/test', (req, res) => {_x000D_
    res.setHeader('Content-Type', 'text/html');_x000D_
    res.send( cache[1] );_x000D_
});_x000D_
_x000D_
app.listen(port, () => {_x000D_
    console.log(`_x000D_
        Server is running at http://${hostname}:${port}/ _x000D_
        Server hostname ${hostname} is listening on port ${port}!_x000D_
    `);_x000D_
});

Not strange at all, people do this all the time. Make sure the collection name is correct (case matters) and that the ObjectId is exact.

Documentation is here

> db.test.insert({x: 1})

> db.test.find()                                               // no criteria
{ "_id" : ObjectId("4ecc05e55dd98a436ddcc47c"), "x" : 1 }      

> db.test.find({"_id" : ObjectId("4ecc05e55dd98a436ddcc47c")}) // explicit
{ "_id" : ObjectId("4ecc05e55dd98a436ddcc47c"), "x" : 1 }

> db.test.find(ObjectId("4ecc05e55dd98a436ddcc47c"))           // shortcut
{ "_id" : ObjectId("4ecc05e55dd98a436ddcc47c"), "x" : 1 }

The join feature supported by Mongodb 3.2 and later versions. You can use joins by using aggregate query.
You can do it using below example :

db.users.aggregate([

    // Join with user_info table
    {
        $lookup:{
            from: "userinfo",       // other table name
            localField: "userId",   // name of users table field
            foreignField: "userId", // name of userinfo table field
            as: "user_info"         // alias for userinfo table
        }
    },
    {   $unwind:"$user_info" },     // $unwind used for getting data in object or for one record only

    // Join with user_role table
    {
        $lookup:{
            from: "userrole", 
            localField: "userId", 
            foreignField: "userId",
            as: "user_role"
        }
    },
    {   $unwind:"$user_role" },

    // define some conditions here 
    {
        $match:{
            $and:[{"userName" : "admin"}]
        }
    },

    // define which fields are you want to fetch
    {   
        $project:{
            _id : 1,
            email : 1,
            userName : 1,
            userPhone : "$user_info.phone",
            role : "$user_role.role",
        } 
    }
]);

This will give result like this:

{
    "_id" : ObjectId("5684f3c454b1fd6926c324fd"),
    "email" : "[email protected]",
    "userName" : "admin",
    "userPhone" : "0000000000",
    "role" : "admin"
}

Hope this will help you or someone else.

Thanks

In my case, I create the mongod.cfg beside the mongd.exe with the following contents.

# mongod.conf

# for documentation of all options, see:
#   http://docs.mongodb.org/manual/reference/configuration-options/

# Where and how to store data.
storage:
  dbPath: D:\apps\MongoDB\Server\4.0\data
  journal:
    enabled: true
#  engine:
#  mmapv1:
#  wiredTiger:

# where to write logging data.
systemLog:
  destination: file
  logAppend: true
  path:  D:\apps\MongoDB\Server\4.0\log\mongod.log

# network interfaces
net:
  port: 27017
  bindIp: 0.0.0.0


#processManagement:

#security:

#operationProfiling:

#replication:

#sharding:

## Enterprise-Only Options:

#auditLog:

#snmp:

Then I run either the two command to create the service.

D:\apps\MongoDB\Server\4.0\bin>mongod --config D:\apps\MongoDB\Server\4.0\bin\mongod.cfg --install

D:\apps\MongoDB\Server\4.0\bin>net stop mongodb
The MongoDB service is stopping.
The MongoDB service was stopped successfully.


D:\apps\MongoDB\Server\4.0\bin>mongod --remove
2019-04-10T09:39:29.305+0800 I CONTROL  [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'
2019-04-10T09:39:29.309+0800 I CONTROL  [main] Trying to remove Windows service 'MongoDB'
2019-04-10T09:39:29.310+0800 I CONTROL  [main] Service 'MongoDB' removed

D:\apps\MongoDB\Server\4.0\bin>
D:\apps\MongoDB\Server\4.0\bin>sc.exe create MongoDB binPath= "\"D:\apps\MongoDB\Server\4.0\bin\mongod.exe\" --service --config=\"D:\apps\MongoDB\Server\4.0\bin\mongod.cfg\""
[SC] CreateService SUCCESS

D:\apps\MongoDB\Server\4.0\bin>net start mongodb
The MongoDB service is starting..
The MongoDB service was started successfully.

D:\apps\MongoDB\Server\4.0\bin>

The following are not correct, note the escaped quotes are required.

D:\apps\MongoDB\Server\4.0\bin>sc.exe create MongoDB binPath= "D:\apps\MongoDB\Server\4.0\bin\mongod --config D:\apps\MongoDB\Server\4.0\bin\mongod.cfg"
[SC] CreateService SUCCESS

D:\apps\MongoDB\Server\4.0\bin>net start mongodb
The service is not responding to the control function.

More help is available by typing NET HELPMSG 2186.


D:\apps\MongoDB\Server\4.0\bin>

We can define the so-called foreign key in MongoDB. However, we need to maintain the data integrity BY OURSELVES. For example,

student
{ 
  _id: ObjectId(...),
  name: 'Jane',
  courses: ['bio101', 'bio102']   // <= ids of the courses
}

course
{
  _id: 'bio101',
  name: 'Biology 101',
  description: 'Introduction to biology'
}

The courses field contains _ids of courses. It is easy to define a one-to-many relationship. However, if we want to retrieve the course names of student Jane, we need to perform another operation to retrieve the course document via _id.

If the course bio101 is removed, we need to perform another operation to update the courses field in the student document.

More: MongoDB Schema Design

The document-typed nature of MongoDB supports flexible ways to define relationships. To define a one-to-many relationship:

Embedded document

1. Suitable for one-to-few.
2. Advantage: no need to perform additional queries to another document.
3. Disadvantage: cannot manage the entity of embedded documents individually.

Example:

student
{
  name: 'Kate Monster',
  addresses : [
     { street: '123 Sesame St', city: 'Anytown', cc: 'USA' },
     { street: '123 Avenue Q', city: 'New York', cc: 'USA' }
  ]
}

Child referencing

Like the student/course example above.

Parent referencing

Suitable for one-to-squillions, such as log messages.

host
{
    _id : ObjectID('AAAB'),
    name : 'goofy.example.com',
    ipaddr : '127.66.66.66'
}

logmsg
{
    time : ISODate("2014-03-28T09:42:41.382Z"),
    message : 'cpu is on fire!',
    host: ObjectID('AAAB')       // Reference to the Host document
}

Virtually, a host is the parent of a logmsg. Referencing to the host id saves much space given that the log messages are squillions.

References:

1. 6 Rules of Thumb for MongoDB Schema Design: Part 1
2. 6 Rules of Thumb for MongoDB Schema Design: Part 2
3. 6 Rules of Thumb for MongoDB Schema Design: Part 3
4. Model One-to-Many Relationships with Document References

For macOS users take care of below issue:

if you installing MongoDB Community on macOS using .tgz Tarball

((Starting with macOS 10.15 Catalina, Apple restricts access to the MongoDB default data directory of /data/db. On macOS 10.15 Catalina, you must use a different data directory, such as /usr/local/var/mongodb.))

you can solve it as the following:

(MacOS Catalina onwards)

Apple created a new Volume in Catalina for security purposes. If you’re on Catalina, you need to create the /data/db folder in System/Volumes/Data.

Use this command:

sudo mkdir -p /System/Volumes/Data/data/db

Then, use this command to give permissions:

sudo chown -R `id -un` /System/Volumes/Data/data/db

this will replace normal

sudo mkdir -p /data/db

Make sure that the /data/db directory has the right permissions by running:

sudo chown -R `id -un` /data/db

once you finish and start mongoDB you can use the following in terminal:

sudo mongod --dbpath /System/Volumes/Data/data/db

In this case, you can add the query page and/ or limit to your URL as a query string.

For example:
?page=0&limit=25 // this would be added onto your URL: http:localhost:5000?page=0&limit=25

Since it would be a String we need to convert it to a Number for our calculations. Let's do it using the parseInt method and let's also provide some default values.

const pageOptions = {
    page: parseInt(req.query.page, 10) || 0,
    limit: parseInt(req.query.limit, 10) || 10
}

sexyModel.find()
    .skip(pageOptions.page * pageOptions.limit)
    .limit(pageOptions.limit)
    .exec(function (err, doc) {
        if(err) { res.status(500).json(err); return; };
        res.status(200).json(doc);
    });

BTW Pagination starts with 0

This error is what you would see if the mongo shell was not able to talk to the mongod server.

This could be because the address was wrong (host or IP) or that it was not running. One thing to note is the log trace provided does not cover the "Fri Nov 9 16:44:06" of your mongo timestamp.

Can you:

1. Provide the command line arguments (if any) used to start your mongod process
2. Provide the log file activity from the mongod startup as well as logs during the mongo shell startup attempt?
3. Confirm that your mongod process is being started on the same machine as the mongo shell?

This is a rehash of the previous answer but it's more likely to work on different mongodb versions.

db.collection.find().limit(1).sort({$natural:-1})

You should create a connection as service then reuse it when need.

// db.service.js
import { MongoClient } from "mongodb";
import database from "../config/database";

const dbService = {
  db: undefined,
  connect: callback => {
    MongoClient.connect(database.uri, function(err, data) {
      if (err) {
        MongoClient.close();
        callback(err);
      }
      dbService.db = data;
      console.log("Connected to database");
      callback(null);
    });
  }
};

export default dbService;

my App.js sample

// App Start
dbService.connect(err => {
  if (err) {
    console.log("Error: ", err);
    process.exit(1);
  }

  server.listen(config.port, () => {
    console.log(`Api runnning at ${config.port}`);
  });
});

and use it wherever you want with

import dbService from "db.service.js"
const db = dbService.db

You can use $addToSet with the aggregation framework to count distinct objects.

For example:

db.collectionName.aggregate([{
    $group: {_id: null, uniqueValues: {$addToSet: "$fieldName"}}
}])

Additionally if you need to restrict the grouping you can use:

db.events.aggregate( 
    {$match: {province: "ON"}},
    {$group: {_id: "$date", number: {$sum: 1}}}  
)

this will work:

$  mongoimport --db databaseName --collection collectionName --file filePath/jsonFile.json 


2021-01-09T11:13:57.410+0530    connected to: mongodb://localhost/
2021-01-09T11:13:58.176+0530    1 document(s) imported successfully. 0 document(s) failed to import.

Above I shared the query along with its response

DATABASE

• camelCase
• append DB on the end of name
• make singular (collections are plural)

MongoDB states a nice example:

To select a database to use, in the mongo shell, issue the use <db> statement, as in the following example:

use myDB
use myNewDB

Content from: https://docs.mongodb.com/manual/core/databases-and-collections/#databases

COLLECTIONS

• Lowercase names: avoids case sensitivity issues, MongoDB collection names are case sensitive.

• Plural: more obvious to label a collection of something as the plural, e.g. "files" rather than "file"

• >No word separators: Avoids issues where different people (incorrectly) separate words (username <-> user_name, first_name <->
  firstname). This one is up for debate according to a few people
  around here but provided the argument is isolated to collection names I don't think it should be ;) If you find yourself improving the
  readability of your collection name by adding underscores or
  camelCasing your collection name is probably too long or should use
  periods as appropriate which is the standard for collection
  categorization.

• Dot notation for higher detail collections: Gives some indication to how collections are related. For example you can be reasonably sure you could delete "users.pagevisits" if you deleted "users", provided the people that designed the schema did a good job.

Content from: http://www.tutespace.com/2016/03/schema-design-and-naming-conventions-in.html

For collections I'm following these suggested patterns until I find official MongoDB documentation.

In pymongo you can update with:
mycollection.update({'_id':mongo_id}, {"$set": post}, upsert=False)
Upsert parameter will insert instead of updating if the post is not found in the database.
Documentation is available at mongodb site.

UPDATE For version > 3 use update_one instead of update:

mycollection.update_one({'_id':mongo_id}, {"$set": post}, upsert=False)

Use aggregation on name and get name with count > 1:

db.collection.aggregate([
    {"$group" : { "_id": "$name", "count": { "$sum": 1 } } },
    {"$match": {"_id" :{ "$ne" : null } , "count" : {"$gt": 1} } }, 
    {"$project": {"name" : "$_id", "_id" : 0} }
]);

To sort the results by most to least duplicates:

db.collection.aggregate([
    {"$group" : { "_id": "$name", "count": { "$sum": 1 } } },
    {"$match": {"_id" :{ "$ne" : null } , "count" : {"$gt": 1} } }, 
    {"$sort": {"count" : -1} },
    {"$project": {"name" : "$_id", "_id" : 0} }     
]);

To use with another column name than "name", change "$name" to "$column_name"

To avoid typing rs.slaveOk() every time, do this:

Create a file named replStart.js, containing one line: rs.slaveOk()

Then include --shell replStart.js when you launch the Mongo shell. Of course, if you're connecting locally to a single instance, this doesn't save any typing.

I had a similar issue, namely I was interested in generating unique numbers, which can be used as identifiers, but doesn't have to. I came up with the following solution. First to initialize the collection:

fun create(mongo: MongoTemplate) {
        mongo.db.getCollection("sequence")
                .insertOne(Document(mapOf("_id" to "globalCounter", "sequenceValue" to 0L)))
    }

An then a service that return unique (and ascending) numbers:

@Service
class IdCounter(val mongoTemplate: MongoTemplate) {

    companion object {
        const val collection = "sequence"
    }

    private val idField = "_id"
    private val idValue = "globalCounter"
    private val sequence = "sequenceValue"

    fun nextValue(): Long {
        val filter = Document(mapOf(idField to idValue))
        val update = Document("\$inc", Document(mapOf(sequence to 1)))
        val updated: Document = mongoTemplate.db.getCollection(collection).findOneAndUpdate(filter, update)!!
        return updated[sequence] as Long
    }
}

I believe that id doesn't have the weaknesses related to concurrent environment that some of the other solutions may suffer from.

Specify the database path explicitly like so, and see if that resolves the issue.

mongod --dbpath data/db

Use Load function

load(filename)

You can directly call any .js file from the mongo shell, and mongo will execute the JavaScript.

Example : mongo localhost:27017/mydb myfile.js

This executes the myfile.js script in mongo shell connecting to mydb database with port 27017 in localhost.

For loading external js you can write

load("/data/db/scripts/myloadjs.js")

Suppose we have two js file myFileOne.js and myFileTwo.js

myFileOne.js

print('From file 1');
load('myFileTwo.js');     // Load other js file .

myFileTwo.js

print('From file 2');

MongoShell

>mongo myFileOne.js

Output

From file 1
From file 2

Type "id" on terminal to see the available user ids you can give, Then simply type

"sudo chown -R idname /data/db"

This worked out for me! Hope this resolves your issue.

_id field is reserved for primary key in mongodb, and that should be a unique value. If you don't set anything to _id it will automatically fill it with "MongoDB Id Object". But you can put any unique info into that field.

Additional info: http://www.mongodb.org/display/DOCS/BSON

Hope it helps.

Judging from the comments, you are looking for:

mongoose.mongo.BSONPure.ObjectID.isValid

Or

mongoose.Types.ObjectId.isValid

Here is example of using aggregation API. To complicate the case we're grouping by case-insensitive words from array property of the document.

db.articles.aggregate([
    {
        $match: {
            keywords: { $not: {$size: 0} }
        }
    },
    { $unwind: "$keywords" },
    {
        $group: {
            _id: {$toLower: '$keywords'},
            count: { $sum: 1 }
        }
    },
    {
        $match: {
            count: { $gte: 2 }
        }
    },
    { $sort : { count : -1} },
    { $limit : 100 }
]);

that give result such as

{ "_id" : "inflammation", "count" : 765 }
{ "_id" : "obesity", "count" : 641 }
{ "_id" : "epidemiology", "count" : 617 }
{ "_id" : "cancer", "count" : 604 }
{ "_id" : "breast cancer", "count" : 596 }
{ "_id" : "apoptosis", "count" : 570 }
{ "_id" : "children", "count" : 487 }
{ "_id" : "depression", "count" : 474 }
{ "_id" : "hiv", "count" : 468 }
{ "_id" : "prognosis", "count" : 428 }

router.route('/product/name/:name')
.get(function(req, res) {

    var regex = new RegExp(req.params.name, "i")
    ,   query = { description: regex };

    Product.find(query, function(err, products) {
        if (err) {
            res.json(err);
        }

        res.json(products);
    });

});  

You can easily convert the string data type to numerical data type.

Don't forget to change collectionName & FieldName. for ex : CollectionNmae : Users & FieldName : Contactno.

Try this query..

db.collectionName.find().forEach( function (x) {
x.FieldName = parseInt(x.FieldName);
db.collectionName.save(x);
});

adding the following lines to my /etc/environment file worked

LC_ALL=en_US.UTF-8
LANG=en_US.UTF-8

You should define you own JSONEncoder and using it:

import json
from bson import ObjectId

class JSONEncoder(json.JSONEncoder):
    def default(self, o):
        if isinstance(o, ObjectId):
            return str(o)
        return json.JSONEncoder.default(self, o)

JSONEncoder().encode(analytics)

It's also possible to use it in the following way.

json.encode(analytics, cls=JSONEncoder)

I made a command line tool to activate the profiler activity and see the logs in a "tail"able way: "mongotail".

But the more interesting feature (also like tail) is to see the changes in "real time" with the -f option, and occasionally filter the result with grep to find a particular operation.

See documentation and installation instructions in: https://github.com/mrsarm/mongotail

MongoDB needs data directory to store data. Default path is /data/db

When you start MongoDB engine, it searches this directory which is missing in your case. Solution is create this directory and assign rwx permission to user.

If you want to change the path of your data directory then you should specify it while starting mongod server like,

mongod --dbpath /data/<path> --port <port no> 

This should help you start your mongod server with custom path and port.

I found a really good option in mongoose that uses distinct returns array all of a specific field in document.

User.find({}).distinct('email').then((err, emails) => { // do something })

... with mongoose on NodeJS that query:

const countryName = req.params.country;

{ 'country': new RegExp(`^${countryName}$`, 'i') };

or

const countryName = req.params.country;

{ 'country': { $regex: new RegExp(`^${countryName}$`), $options: 'i' } };

// ^australia$

or

const countryName = req.params.country;

{ 'country': { $regex: new RegExp(`^${countryName}$`, 'i') } };

// ^turkey$

A full code example in Javascript, NodeJS with Mongoose ORM on MongoDB

// get all customers that given country name
app.get('/customers/country/:countryName', (req, res) => {
    //res.send(`Got a GET request at /customer/country/${req.params.countryName}`);

    const countryName = req.params.countryName;

    // using Regular Expression (case intensitive and equal): ^australia$

    // const query = { 'country': new RegExp(`^${countryName}$`, 'i') };
    // const query = { 'country': { $regex: new RegExp(`^${countryName}$`, 'i') } };
    const query = { 'country': { $regex: new RegExp(`^${countryName}$`), $options: 'i' } };

    Customer.find(query).sort({ name: 'asc' })
        .then(customers => {
            res.json(customers);
        })
        .catch(error => {
            // error..
            res.send(error.message);
        });
});

This is an old question, but it came up first for me in google results when searching "mongoose insert array of documents".

There are two options model.create() [mongoose] and model.collection.insert() [mongodb] which you can use. View a more thorough discussion here of the pros/cons of each option:

Mongoose (mongodb) batch insert?

Check out these docs:

http://www.mongodb.org/display/DOCS/Starting+and+Stopping+Mongo#StartingandStoppingMongo-SendingaUnixINTorTERMsignal

If you started it in a terminal you should be ok with a ctrl + 'c' -- this will do a clean shutdown.

However, if you are using launchctl there are specific instructions for that which will vary depending on how it was installed.

If you are using Homebrew it would be launchctl stop homebrew.mxcl.mongodb

Using aggregate is the right approach, but you need to $unwind the list array before applying the $match so that you can filter individual elements and then use $group to put it back together:

db.test.aggregate([
    { $match: {_id: ObjectId("512e28984815cbfcb21646a7")}},
    { $unwind: '$list'},
    { $match: {'list.a': {$gt: 3}}},
    { $group: {_id: '$_id', list: {$push: '$list.a'}}}
])

outputs:

{
  "result": [
    {
      "_id": ObjectId("512e28984815cbfcb21646a7"),
      "list": [
        4,
        5
      ]
    }
  ],
  "ok": 1
}

MongoDB 3.2 Update

Starting with the 3.2 release, you can use the new $filter aggregation operator to do this more efficiently by only including the list elements you want during a $project:

db.test.aggregate([
    { $match: {_id: ObjectId("512e28984815cbfcb21646a7")}},
    { $project: {
        list: {$filter: {
            input: '$list',
            as: 'item',
            cond: {$gt: ['$$item.a', 3]}
        }}
    }}
])

If I want to edit a specified comment, how do I get its content and its question?

If you had kept track of the number of comments and the index of the comment you wanted to alter, you could use the dot operator (SO example).

You could do f.ex.

db.questions.update(
    {
        "title": "aaa"       
    }, 
    { 
        "comments.0.contents": "new text"
    }
)

(as another way to edit the comments inside the question)

Here's an example of a "join" * Actors and Movies collections:

https://github.com/mongodb/cookbook/blob/master/content/patterns/pivot.txt

It makes use of .mapReduce() method

* join - an alternative to join in document-oriented databases

Just a minor addition to Gaafar's answer, it gave me a deprecation warning. Instead of on the server object, like this:

MongoClient.connect(MONGO_URL, {
    server: {
        reconnectTries: Number.MAX_VALUE,
        reconnectInterval: 1000
    }
});

It can go on the top level object. Basically, just take it out of the server object and put it in the options object like this:

MongoClient.connect(MONGO_URL, {
    reconnectTries: Number.MAX_VALUE,
    reconnectInterval: 1000
});

mongodump: To dump all the records:

mongodump --db databasename

To limit the amount of data included in the database dump, you can specify --db and --collection as options to mongodump. For example:

mongodump --collection myCollection --db test

This operation creates a dump of the collection named myCollection from the database 'test' in a dump/ subdirectory of the current working directory. NOTE: mongodump overwrites output files if they exist in the backup data folder.

mongorestore: To restore all data to the original database:

1) mongorestore --verbose \path\dump

or restore to a new database:

2) mongorestore --db databasename --verbose \path\dump\<dumpfolder>

Note: Both requires mongod instances.

for huge size collections, you can use Bulk.insert()

var bulk = db.getSiblingDB(dbName)[targetCollectionName].initializeUnorderedBulkOp();
db.getCollection(sourceCollectionName).find().forEach(function (d) {
    bulk.insert(d);
});
bulk.execute();

This will save a lot of time. In my case, I'm copying collection with 1219 documents: iter vs Bulk (67 secs vs 3 secs)

Check that you have a blank line at the end of the file, otherwise the last line will be ignored on some versions of mongoimport

SQL Server 2012 and Later

Just use Try_Convert instead:

TRY_CONVERT takes the value passed to it and tries to convert it to the specified data_type. If the cast succeeds, TRY_CONVERT returns the value as the specified data_type; if an error occurs, null is returned. However if you request a conversion that is explicitly not permitted, then TRY_CONVERT fails with an error.

Read more about Try_Convert.

SQL Server 2008 and Earlier

The traditional way of handling this is by guarding every expression with a case statement so that no matter when it is evaluated, it will not create an error, even if it logically seems that the CASE statement should not be needed. Something like this:

SELECT
   Account_Code =
      Convert(
         bigint, -- only gives up to 18 digits, so use decimal(20, 0) if you must
         CASE
         WHEN X.Account_Code LIKE '%[^0-9]%' THEN NULL
         ELSE X.Account_Code
         END
      ),
   A.Descr
FROM dbo.Account A
WHERE
   Convert(
      bigint,
      CASE
      WHEN X.Account_Code LIKE '%[^0-9]%' THEN NULL
      ELSE X.Account_Code
      END
   ) BETWEEN 503100 AND 503205

However, I like using strategies such as this with SQL Server 2005 and up:

SELECT
   Account_Code = Convert(bigint, X.Account_Code),
   A.Descr
FROM
   dbo.Account A
   OUTER APPLY (
      SELECT A.Account_Code WHERE A.Account_Code NOT LIKE '%[^0-9]%'
   ) X
WHERE
   Convert(bigint, X.Account_Code) BETWEEN 503100 AND 503205

What this does is strategically switch the Account_Code values to NULL inside of the X table when they are not numeric. I initially used CROSS APPLY but as Mikael Eriksson so aptly pointed out, this resulted in the same error because the query parser ran into the exact same problem of optimizing away my attempt to force the expression order (predicate pushdown defeated it). By switching to OUTER APPLY it changed the actual meaning of the operation so that X.Account_Code could contain NULL values within the outer query, thus requiring proper evaluation order.

You may be interested to read Erland Sommarskog's Microsoft Connect request about this evaluation order issue. He in fact calls it a bug.

There are additional issues here but I can't address them now.

P.S. I had a brainstorm today. An alternate to the "traditional way" that I suggested is a SELECT expression with an outer reference, which also works in SQL Server 2000. (I've noticed that since learning CROSS/OUTER APPLY I've improved my query capability with older SQL Server versions, too--as I am getting more versatile with the "outer reference" capabilities of SELECT, ON, and WHERE clauses!)

SELECT
   Account_Code =
      Convert(
         bigint,
         (SELECT A.AccountCode WHERE A.Account_Code NOT LIKE '%[^0-9]%')
      ),
   A.Descr
FROM dbo.Account A
WHERE
   Convert(
      bigint,
      (SELECT A.AccountCode WHERE A.Account_Code NOT LIKE '%[^0-9]%')
   ) BETWEEN 503100 AND 503205

It's a lot shorter than the CASE statement.

public static class EnumEx
{
    public static T GetValueFromDescription<T>(string description) where T : Enum
    {
        foreach(var field in typeof(T).GetFields())
        {
            if (Attribute.GetCustomAttribute(field,
            typeof(DescriptionAttribute)) is DescriptionAttribute attribute)
            {
                if (attribute.Description == description)
                    return (T)field.GetValue(null);
            }
            else
            {
                if (field.Name == description)
                    return (T)field.GetValue(null);
            }
        }

        throw new ArgumentException("Not found.", nameof(description));
        // Or return default(T);
    }
}

Usage:

var panda = EnumEx.GetValueFromDescription<Animal>("Giant Panda");

if you are going to step down, then change your project's source to 1.7 as well,

right click on your Project -> Properties -> Sources window 

and set 1.7 here

_{note: however I would suggest you to figure out why it doesn't work on 1.8}

Update: PointedEars mentions that the correct stand in for   in all css situations would be
'\a0 ' implying that the space is a terminator to the hex string and is absorbed by the escaped sequence. He further pointed out this authoritative description which sounds like a good solution to the problem I described and fixed below.

What you need to do is use the escaped unicode. Despite what you've been told \00a0 is not a perfect stand-in for   within CSS; so try:

content:'>\a0 ';          /* or */
content:'>\0000a0';       /* because you'll find: */
content:'No\a0 Break';    /* and */
content:'No\0000a0Break'; /* becomes No Break as opposed to below */

Specifically using \0000a0 as  . If you try, as suggested by mathieu and millikin:

content:'No\00a0Break'   /* becomes No਋reak */

It takes the B into the hex escaped characters. The same occurs with 0-9a-fA-F.

jupyter kernelspec remove now exists, see #7934.

So you can just.

# List all kernels and grap the name of the kernel you want to remove
jupyter kernelspec list
# Remove it
jupyter kernelspec remove <kernel_name>

That's it.

You can use the following vba code and input them into standard module in excel. A list of websites can be entered and should be entered like this on cell A1 in Excel - www.stackoverflow.com

ActiveSheet.Cells(1,2).Value merely takes the number of website links that you have on cell B1 in Excel and will loop the code again and again based on number of website links you have placed on the sheet. Therefore Chrome will open up a new tab for each website link.

I hope this helps with the dynamic website you have got.

Sub multiplechrome()

    Dim WebUrl As String
    Dim i As Integer

    For i = 1 To ActiveSheet.Cells(1, 2).Value
        WebUrl = "http://" & Cells(i, 1).Value & """"
        Shell ("C:\Program Files (x86)\Google\Chrome\Application\chrome.exe -url " & WebUrl)

    Next
End Sub

A non-static member function must be called with an object. That is, it always implicitly passes "this" pointer as its argument.

Because your std::function signature specifies that your function doesn't take any arguments (<void(void)>), you must bind the first (and the only) argument.

std::function<void(void)> f = std::bind(&Foo::doSomething, this);

If you want to bind a function with parameters, you need to specify placeholders:

using namespace std::placeholders;
std::function<void(int,int)> f = std::bind(&Foo::doSomethingArgs, this, std::placeholders::_1, std::placeholders::_2);

Or, if your compiler supports C++11 lambdas:

std::function<void(int,int)> f = [=](int a, int b) {
    this->doSomethingArgs(a, b);
}

(I don't have a C++11 capable compiler at hand right now, so I can't check this one.)

File file = new File("src/test/resources/input.txt");
FileInputStream input = new FileInputStream(file);
MultipartFile multipartFile = new MockMultipartFile("file",
            file.getName(), "text/plain", IOUtils.toByteArray(input));

Add reference to add System.Configuration:-

System.Configuration.ConfigurationManager.
    ConnectionStrings["connectionStringName"].ConnectionString;

Also you can change the WebConfig file to include the provider name:-

<connectionStrings>
  <add name="Dbconnection" 
       connectionString="Server=localhost; Database=OnlineShopping;
       Integrated Security=True"; providerName="System.Data.SqlClient" />
</connectionStrings>

volatile is a field modifier, while synchronized modifies code blocks and methods. So we can specify three variations of a simple accessor using those two keywords:

    int i1;
    int geti1() {return i1;}

    volatile int i2;
    int geti2() {return i2;}

    int i3;
    synchronized int geti3() {return i3;}

geti1() accesses the value currently stored in i1 in the current thread. Threads can have local copies of variables, and the data does not have to be the same as the data held in other threads.In particular, another thread may have updated i1 in it's thread, but the value in the current thread could be different from that updated value. In fact Java has the idea of a "main" memory, and this is the memory that holds the current "correct" value for variables. Threads can have their own copy of data for variables, and the thread copy can be different from the "main" memory. So in fact, it is possible for the "main" memory to have a value of 1 for i1, for thread1 to have a value of 2 for i1 and for thread2 to have a value of 3 for i1 if thread1 and thread2 have both updated i1 but those updated value has not yet been propagated to "main" memory or other threads.

On the other hand, geti2() effectively accesses the value of i2 from "main" memory. A volatile variable is not allowed to have a local copy of a variable that is different from the value currently held in "main" memory. Effectively, a variable declared volatile must have it's data synchronized across all threads, so that whenever you access or update the variable in any thread, all other threads immediately see the same value. Generally volatile variables have a higher access and update overhead than "plain" variables. Generally threads are allowed to have their own copy of data is for better efficiency.

There are two differences between volitile and synchronized.

Firstly synchronized obtains and releases locks on monitors which can force only one thread at a time to execute a code block. That's the fairly well known aspect to synchronized. But synchronized also synchronizes memory. In fact synchronized synchronizes the whole of thread memory with "main" memory. So executing geti3() does the following:

1. The thread acquires the lock on the monitor for object this .
2. The thread memory flushes all its variables, i.e. it has all of its variables effectively read from "main" memory .
3. The code block is executed (in this case setting the return value to the current value of i3, which may have just been reset from "main" memory).
4. (Any changes to variables would normally now be written out to "main" memory, but for geti3() we have no changes.)
5. The thread releases the lock on the monitor for object this.

So where volatile only synchronizes the value of one variable between thread memory and "main" memory, synchronized synchronizes the value of all variables between thread memory and "main" memory, and locks and releases a monitor to boot. Clearly synchronized is likely to have more overhead than volatile.

http://javaexp.blogspot.com/2007/12/difference-between-volatile-and.html

Try this

Check if table have there , and drop the table , then create

using (SqlCommand command = new SqlCommand("IF EXISTS (
SELECT *
FROM sys.tables
WHERE name LIKE '#Customer%')
DROP TABLE #Customer CREATE TABLE Customer(First_Name char(50),Last_Name char(50),Address char(50),City char(50),Country char(25),Birth_Date datetime);", con))

mycollection.find_one_and_update({"_id": mongo_id}, 
                                 {"$set": {"newfield": "abc"}})

should work splendidly for you. If there is no document of id mongo_id, it will fail, unless you also use upsert=True. This returns the old document by default. To get the new one, pass return_document=ReturnDocument.AFTER. All parameters are described in the API.

The method was introduced for MongoDB 3.0. It was extended for 3.2, 3.4, and 3.6.

DateTimeFormatInfo usDtfi = new CultureInfo("en-US", false).DateTimeFormat;
DateTimeFormatInfo ukDtfi = new CultureInfo("en-GB", false).DateTimeFormat;
string result = Convert.ToDateTime("12/01/2011", usDtfi).ToString(ukDtfi.ShortDatePattern);

This will do the trick ^^

If Git for windows is installed, run Git Bash shell:

  bash

You can run ssh from within Bash shell (Bash is aware of the path of ssh)

To know the exact path of ssh, run "where" command in Bash shell:

  $ where ssh

you get:

  c:\Program Files\Git\usr\bin\ssh.exe

when selecting packages at installation or update search for 'make' in searchbox and select the boxes showing 'make' and also 'gcc' mostly found in devel package.

import java.util.AbstractSet;
import java.util.Iterator;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;


public class ConcurrentHashSet<E> extends AbstractSet<E> implements Set<E>{
   private final ConcurrentMap<E, Object> theMap;

   private static final Object dummy = new Object();

   public ConcurrentHashSet(){
      theMap = new ConcurrentHashMap<E, Object>();
   }

   @Override
   public int size() {
      return theMap.size();
   }

   @Override
   public Iterator<E> iterator(){
      return theMap.keySet().iterator();
   }

   @Override
   public boolean isEmpty(){
      return theMap.isEmpty();
   }

   @Override
   public boolean add(final E o){
      return theMap.put(o, ConcurrentHashSet.dummy) == null;
   }

   @Override
   public boolean contains(final Object o){
      return theMap.containsKey(o);
   }

   @Override
   public void clear(){
      theMap.clear();
   }

   @Override
   public boolean remove(final Object o){
      return theMap.remove(o) == ConcurrentHashSet.dummy;
   }

   public boolean addIfAbsent(final E o){
      Object obj = theMap.putIfAbsent(o, ConcurrentHashSet.dummy);
      return obj == null;
   }
}

Constructor The constructor is a method that's automatically called during the creation of an object from a class. ... Simply put, the constructor aids in constructing things. In React, the constructor is no different. It can be used to bind event handlers to the component and/or initializing the local state of the component.Jan 23, 2019

getInitialState In ES6 classes, you can define the initial state by assigning this.state in the constructor:

Look at this example

var Counter = createReactClass({
  getInitialState: function() {
    return {count: this.props.initialCount};
  },
  // ...
});

With createReactClass(), you have to provide a separate getInitialState method that returns the initial state:

Try adding the conda-forge channel to your list of channels with this command:
conda config --append channels conda-forge. It tells conda to also look on the conda-forge channel when you search for packages. You can then simply install the two packages with conda install slycot control.

Channels are basically servers for people to host packages on and the community-driven conda-forge is usually a good place to start when packages are not available via the standard channels. I checked and both slycot and control seem to be available there.

You type diskpart, list disk and check disks for boot.
Ex:

dispart 
list disk 
select disk 0 
detail disk

The disk with Boot volume is disk with windows installed:

I got such error after a simple try of code refactoring. It has happened nor after some library was connected neither any changes in gradle. It looked like something in my code was wrong but the compiler could not found the issue. That's why I double checked all changes that I did and found that I had changed somehow method signature in the interface but had not changed it in class that implements it. I got this error twice during one day and decided to share my experience. I hope that it is a temporary compiler bug.

Solution 1 Possible solution is to go to File -> Settings -> Compiler -> and add "--stacktrace --debug" to Command-line Options. Read log and try to found the answer of what went wrong.

In new Android Studio 3.1.+, you can enable/disable console log details by pressing "Toggle View" on "Build" tab. There you can find the details. Pay attention that both modes can be useful for investigation of the problem's reason. See: https://stackoverflow.com/a/49717363/

Solution 2 Click on Gradle (on the right side bar) then under :app choose assembleDebug (or assembleYourFlavor if you use flavors). Error will show up in Run tab. See: https://stackoverflow.com/a/51022296

Solution 3 As a last resort. In the android studio, try Analyze -> Inspect Code -> Whole project. Wait until the inspection is over and then correct errors in "General" section and possible ones in other sections.

Note The kapt3 can be a source of such bugs. I removed apply plugin: 'kotlin-kapt' and added kapt { generateStubs = true } into android {} section of build.gradle. It seems that the previous version of the kapt generator is bugs free. (Update. It looks like a bug with kapt is gone on kotlin version 1.2.+)

The solution to this is actually easier than I thought. You can simply add in your custom adapter's getView() method a setOnClickListener() for the buttons you're using.

Any data associated with the button has to be added with myButton.setTag() in the getView() and can be accessed in the onClickListener via view.getTag()

I posted a detailed solution on my blog as a tutorial.

Yes, safari will detect the *.ipa and will try to install it, but the ipa needs to be correctly signed and only allowed devices would be able to install it.

http://www.diawi.com is a service that will help you with this process.

All of this is for Ad-hoc distribution, not for production apps.

More information on below link : Is there a way to install iPhone App via browser?

finish your current_activity using method finish() onBack method of your current_activity

and then add below lines in onDestroy of the current_activity for Removing Force close

@Override
public void onDestroy()
{
    android.os.Process.killProcess(android.os.Process.myPid());
    super.onDestroy();
}

int(n**0.5) is the floor value of sqrt(n) which you confused with power 2 of n (n**2). If n is not prime, there must be two numbers 1 < i <= j < n such that: i * j = n.

Now, since sqrt(n) * sqrt(n) = n assuming one of i,j is bigger than (or equals to) sqrt(n) - it means that the other one has to be smaller than (or equals to) sqrt(n).

Since that is the case, it's good enough to iterate the integer numbers in the range [2, sqrt(n)]. And that's exactly what the code that was posted is doing.

If you want to come out as a real smartass, use the following one-liner function:

import re
def is_prime(n):    
    return not re.match(r'^1?$|^(11+?)\1+$',n*'1')

An explanation for the "magic regex" can be found here

The best and easiest method is to base64 encode the font file. And use it in font-face. For encoding, go to the folder having the font-file and use the command in terminal:

base64 Roboto.ttf > basecodedtext.txt

You will get an output file named basecodedtext.txt. Open that file. Remove any white spaces in that.

Copy that code and add the following line to the CSS file:

@font-face {
  font-family: "font-name";
  src: url(data:application/x-font-woff;charset=utf-8;base64,<<paste your code here>>) format('woff');
}  

Then you can use the font-family: "font-name" in your CSS.

For anyone still coming to this post, the other option is to simply omit the parentheses:

Sub SomeOtherSub(Stattyp As String)
    'Daty and the other variables are defined here

    CatSubProduktAreakum Stattyp, Daty + UBound(SubCategories) + 2

End Sub

The Call keywords is only really in VBA for backwards compatibilty and isn't actually required.

If however, you decide to use the Call keyword, then you have to change your syntax to suit.

'// With Call
Call Foo(Bar)

'// Without Call
Foo Bar

Both will do exactly the same thing.

That being said, there may be instances to watch out for where using parentheses unnecessarily will cause things to be evaluated where you didn't intend them to be (as parentheses do this in VBA) so with that in mind the better option is probably to omit the Call keyword and the parentheses

This feature shud have come built in Ios, however we need to do externally.
Insert the below code
* To move view when textField is under keyboard,
* Not to move view when textField is above keyboard
* To move View based on the height of the keyboard when needed.
This works and tested in all cases.

import UIKit

class NamVcc: UIViewController, UITextFieldDelegate
{
    @IBOutlet weak var NamTxtBoxVid: UITextField!

    var VydTxtBoxVar: UITextField!
    var ChkKeyPadDspVar: Bool = false
    var KeyPadHytVal: CGFloat!

    override func viewDidLoad()
    {
        super.viewDidLoad()

        NamTxtBoxVid.delegate = self
    }

    override func viewWillAppear(animated: Bool)
    {
        NSNotificationCenter.defaultCenter().addObserver(self,
            selector: #selector(TdoWenKeyPadVyd(_:)),
            name:UIKeyboardWillShowNotification,
            object: nil);
        NSNotificationCenter.defaultCenter().addObserver(self,
            selector: #selector(TdoWenKeyPadHyd(_:)),
            name:UIKeyboardWillHideNotification,
            object: nil);
    }

    func textFieldDidBeginEditing(TxtBoxPsgVar: UITextField)
    {
        self.VydTxtBoxVar = TxtBoxPsgVar
    }

    func textFieldDidEndEditing(TxtBoxPsgVar: UITextField)
    {
        self.VydTxtBoxVar = nil
    }

    func textFieldShouldReturn(TxtBoxPsgVar: UITextField) -> Bool
    {
        self.VydTxtBoxVar.resignFirstResponder()
        return true
    }

    override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?)
    {
        view.endEditing(true)
        super.touchesBegan(touches, withEvent: event)
    }

    func TdoWenKeyPadVyd(NfnPsgVar: NSNotification)
    {
        if(!self.ChkKeyPadDspVar)
        {
            self.KeyPadHytVal = (NfnPsgVar.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue().height

            var NonKeyPadAraVar: CGRect = self.view.frame
            NonKeyPadAraVar.size.height -= self.KeyPadHytVal

            let VydTxtBoxCenVal: CGPoint? = VydTxtBoxVar?.frame.origin

            if (!CGRectContainsPoint(NonKeyPadAraVar, VydTxtBoxCenVal!))
            {
                self.ChkKeyPadDspVar = true
                UIView.animateWithDuration(1.0,
                    animations:
                    { self.view.frame.origin.y -= (self.KeyPadHytVal)},
                    completion: nil)
            }
            else
            {
                self.ChkKeyPadDspVar = false
            }
        }

    }

    func TdoWenKeyPadHyd(NfnPsgVar: NSNotification)
    {
        if (self.ChkKeyPadDspVar)
        {
            self.ChkKeyPadDspVar = false
            UIView.animateWithDuration(1.0,
                animations:
                { self.view.frame.origin.y += (self.KeyPadHytVal)},
                completion: nil)
        }
    }

    override func viewDidDisappear(animated: Bool)
    {
        super.viewWillDisappear(animated)
        NSNotificationCenter.defaultCenter().removeObserver(self)
        view.endEditing(true)
        ChkKeyPadDspVar = false
    }
}

|::| Sometimes View wil be down, In that case use height +/- 150 :

    NonKeyPadAraVar.size.height -= self.KeyPadHytVal + 150

    { self.view.frame.origin.y -= self.KeyPadHytVal  - 150},
                    completion: nil)

    { self.view.frame.origin.y += self.KeyPadHytVal  - 150},
                completion: nil)

Late simple example:

from os import path, getcwd, chdir

def print_my_path():
    print('cwd:     {}'.format(getcwd()))
    print('__file__:{}'.format(__file__))
    print('abspath: {}'.format(path.abspath(__file__)))

print_my_path()

chdir('..')

print_my_path()

Under Python-2.*, the second call incorrectly determines the path.abspath(__file__) based on the current directory:

cwd:     C:\codes\py
__file__:cwd_mayhem.py
abspath: C:\codes\py\cwd_mayhem.py
cwd:     C:\codes
__file__:cwd_mayhem.py
abspath: C:\codes\cwd_mayhem.py

As noted by @techtonik, in Python 3.4+, this will work fine since __file__ returns an absolute path.

In my case Ubuntu 16.04 I have no crti.o at all:

$ find /usr/ -name crti*

So I install developer libc6-dev package:

sudo apt-get install libc6-dev

You could get the full path as a string then split it into a list using your operating system's separator character. Then you get the program name, folder name etc by accessing the elements from the end of the list using negative indices.

Like this:

import os
strPath = os.path.realpath(__file__)
print( f"Full Path    :{strPath}" )
nmFolders = strPath.split( os.path.sep )
print( "List of Folders:", nmFolders )
print( f"Program Name :{nmFolders[-1]}" )
print( f"Folder Name  :{nmFolders[-2]}" )
print( f"Folder Parent:{nmFolders[-3]}" )

The output of the above was this:

Full Path    :C:\Users\terry\Documents\apps\environments\dev\app_02\app_02.py
List of Folders: ['C:', 'Users', 'terry', 'Documents', 'apps', 'environments', 'dev', 'app_02', 'app_02.py']
Program Name :app_02.py
Folder Name  :app_02
Folder Parent:dev

Using only standard API, pass the string to a URL object then convert it to a URI object. This will accurately determine the validity of the URL according to the RFC2396 standard.

Example:

public boolean isValidURL(String url) {

    try {
        new URL(url).toURI();
    } catch (MalformedURLException | URISyntaxException e) {
        return false;
    }

    return true;
}

This will solve all gulp problem

sudo npm install gulp && sudo npm install --save del && sudo gulp build

display: inline-block is your friend you just need all three parts of the construct - before, the "block", after - to be one, then you can vertically align them all to the middle:

Working Example

(it looks like your picture anyway ;))

CSS:

p, div {
  display: inline-block; 
  vertical-align: middle;
}
p, div {
  display: inline !ie7; /* hack for IE7 and below */
}

table {
  background: #000; 
  color: #fff; 
  font-size: 16px; 
  font-weight: bold; margin: 0 10px;
}

td {
  padding: 5px; 
  text-align: center;
}

HTML:

<p>some text</p> 
<div>
  <table summary="">
  <tr><td>A</td></tr>
  <tr><td>B</td></tr>
  <tr><td>C</td></tr>
  <tr><td>D</td></tr>
  </table>
</div> 
<p>continues afterwards</p>

$image = imagecreatefromjpeg($_GET['src']);
$filename = 'images/cropped_whatever.jpg'

Must be replaced with:

$image = imagecreatefromjpeg($_GET['src']);

Then it will work!

I recently used this to read all the lines from a file:

alist = open('maze.txt').read().split()

or you can use this for that little bit of extra added safety:

with f as open('maze.txt'):
    alist = f.read().split()

It doesn't work with whitespace in-between text in a single line, but it looks like your example file might not have whitespace splitting the values. It is a simple solution and it returns an accurate list of values, and does not add an empty string: '' for every empty line, such as a newline at the end of the file.

Your formula should be of the form =IF(X2 >= 85,0.559,IF(X2 >= 80,0.327,IF(X2 >=75,0.255,0))). This simulates the ELSE-IF operand Excel lacks. Your formulas were using two conditions in each, but the second parameter of the IF formula is the value to use if the condition evaluates to true. You can't chain conditions in that manner.

At startup pass this -Dname=value

and then in your code you should use

value=System.getProperty("name");

to get that value

    //sure run it i will also test it
//we make a class that extends with the fragment
    public class Example_3_1 extends Fragment  implements OnClickListener
    {
       View vi;
        EditText t;
        EditText t1;
        Button bu;
 // that are by defult function of fragment extend class
     @Override
       public View onCreateView(LayoutInflater inflater,ViewGroup container,BundlesavedInstanceState) 
       {        
           vi=inflater.inflate(R.layout.example_3_1, container, false);// load the xml file 
           bu=(Button) vi.findViewById(R.id.button1);// get button id from example_3_1 xml file
           bu.setOnClickListener(this); //on button appay click listner
           t=(EditText) vi.findViewById(R.id.editText1);// id get from example_3_1 xml file
           t1=(EditText) vi.findViewById(R.id.editText2);
          return vi; // return the view object,that set the xml file  example_3_1 xml file
       }
       @Override
       public void onClick(View v)//on button click that called
       {

          switch(v.getId())// on run time get id what button os click and get id
          {
          case R.id.button1:        // it mean if button1 click then this work
           t.setText("UMTien");     //set text 
           t1.setText("programming");
           break;
          }
    }     }

Try this if you are on ubuntu:

sudo apt-get update
sudo apt-get install build-essential libpq-dev libssl-dev openssl libffi-dev zlib1g-dev
sudo apt-get install python3-pip python3.7-dev
sudo apt-get install python3.7

In case you don't have the repository and so it fires a not-found package you first have to install this:

sudo apt-get install -y software-properties-common
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt-get update

more info here: http://devopspy.com/python/install-python-3-6-ubuntu-lts/

It seems the problem is that / is not floor operation.

int mod(int m, float n)
{  
  return m - floor(m/n)*n;
}

INVISIBLE:

This view is invisible, but it still takes up space for layout purposes.

GONE:

This view is invisible, and it doesn't take any space for layout purposes.

If you are using express, you can use cors middleware as follows:

var express = require('express')
var cors = require('cors')
var app = express()

app.use(cors())

The above answers are good. I want to add another point. Up to some values both of them result in the same quotient. After that floor division operator (//) works fine but not division (/) operator.

 - > int(755349677599789174/2)
 - > 377674838799894592      #wrong answer
 - > 755349677599789174 //2
 - > 377674838799894587      #correct answer

You can try the simple one

select to_date('2020-07-08T15:30:42Z','yyyy-mm-dd"T"hh24:mi:ss"Z"') from dual;

You could use toPrecision() and toFixed() methods of Number type. Check this link How can I format numbers as money in JavaScript?

Set-ADUser -Identity anyUser -Replace @{extensionAttribute4="myString"}

This is also usefull

In GDB 7.2:

(gdb) help info proc
Show /proc process information about any running process.
Specify any process id, or use the program being debugged by default.
Specify any of the following keywords for detailed info:
  mappings -- list of mapped memory regions.
  stat     -- list a bunch of random process info.
  status   -- list a different bunch of random process info.
  all      -- list all available /proc info.

You want info proc mappings, except it doesn't work when there is no /proc (such as during pos-mortem debugging).

Try maintenance info sections instead.

You just need to divide each element by the sum of the values in its column.

Doing this should suffice:

data.perc <- apply(data, 2, function(x){x/sum(x)})

Note that the second parameter tells apply to apply the provided function to columns (using 1 you would apply it to rows). The anonymous function, then, gets passed each data column, one at a time.

try my solution. I use 'required' attribute to get know whether input is filled and if not I show the text from attribute 'placeholder'

//HTML
<input required placeholder="Date" class="textbox-n" type="date" id="date">

//CSS
input[type="date"]:not(:valid):before {
   content: attr(placeholder);
   // style it like it real placeholder
}

You can't verify (with enough accuracy to rely on) if an email actually exists using just a single PHP method. You can send an email to that account, but even that alone won't verify the account exists (see below). You can, at least, verify it's at least formatted like one

if(filter_var($email, FILTER_VALIDATE_EMAIL)) {
    //Email is valid
}

You can add another check if you want. Parse the domain out and then run checkdnsrr

if(checkdnsrr($domain)) {
     // Domain at least has an MX record, necessary to receive email
}

Many people get to this point and are still unconvinced there's not some hidden method out there. Here are some notes for you to consider if you're bound and determined to validate email:

1. Spammers also know the "connection trick" (where you start to send an email and rely on the server to bounce back at that point). One of the other answers links to this library which has this caveat

   Some mail servers will silently reject the test message, to prevent spammers from checking against their users' emails and filter the valid emails, so this function might not work properly with all mail servers.

   In other words, if there's an invalid address you might not get an invalid address response. In fact, virtually all mail servers come with an option to accept all incoming mail (here's how to do it with Postfix). The answer linking to the validation library neglects to mention that caveat.

2. Spam blacklists. They blacklist by IP address and if your server is constantly doing verification connections you run the risk of winding up on Spamhaus or another block list. If you get blacklisted, what good does it do you to validate the email address?

3. If it's really that important to verify an email address, the accepted way is to force the user to respond to an email. Send them a full email with a link they have to click to be verified. It's not spammy, and you're guaranteed that any responses have a valid address.

You mentioned mobile-first sites... For a responsive design, it's certainly possible to override small-screen styles with large-screen styles. But you might not need to.

Try this:

.thisClass {
    /* Rules for all window sizes. */
}

@media all and (max-width: 480px) {
    .thisClass {
        /* Rules for only small browser windows. */
    }
}

@media all and (min-width: 481px) and (max-width: 960px) {
    .thisClass {
        /* Rules for only medium browser windows. */
    }
}

@media all and (min-width: 961px) {
    .thisClass {
        /* Rules for only large browser windows. */
    }
}

Those media queries don't overlap, so their rules don't override each other. This makes it easier to maintain each set of styles separately.

The OP is trying to count the number of properties in a JSON object. This could be done with an incremented temp variable in the iterator, but he seems to want to know the count before the iteration begins. A simple function that meets the need is provided at the bottom of this page.

Here's a cut and paste of the code, which worked for me:

function countProperties(obj) {
  var prop;
  var propCount = 0;

  for (prop in obj) {
    propCount++;
  }
  return propCount;
}

This should work well for a JSON object. For other objects, which may derive properties from their prototype chain, you would need to add a hasOwnProperty() test.

print('\007')

Plays the bell sound on Linux. Plays the error sound on Windows 10.

Do “chmod +x script”

Now try executing

If you want to turn off the warnings about the specific strings, you can use the following:

strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>    

    <!--suppress MissingTranslation -->
    <string name="some_string">ignore my translation</string>
    ...

</resources>

If you want to warn on specific strings instead of an error, you will need to build a custom Lint rule to adjust the severity status for a specific thing.

http://tools.android.com/tips/lint-custom-rules

You can download language pack and use "Install or Uninstall display languages" wizard. To do this:

• Press Win+R, paste lpksetup and press Enter
• Wizard will appear on the screen
• Click the Install display languages button
• In the next page of the wizard, click Browse and pick the *.cab file of the MUI language you downloaded
• Click the Next button to install language

In either ksh93 or bash with the extglob option enabled:

if [[ $var == +([0-9]) ]]; then ...

I'm getting SecurityError: The operation is insecure.

when using canvas.toDataURL('image/jpg'); in safari browser

If you're getting this error from Netbeans (7.2+) then it means that your separately installed version of Subversion is higher than the version in netbeans. In my case Netbeans (v7.3.1) had SVN v1.7 and I'd just upgraded my SVN to v1.8.

If you look in Tools > Options > Miscellaneous (tab) > Versioning (tab) > Subversion (pane), set the Preferred Client = CLI, then you can set the path the the installed SVN which for me was C:\Program Files\TortoiseSVN\bin.

More can be found on the Netbeans Subversion Clients FAQ.

for Laravel 5.4
for gmail

in .env file

MAIL_DRIVER=mail
MAIL_HOST=mail.gmail.com
MAIL_PORT=587
MAIL_USERNAME=<username>@gmail.com
MAIL_PASSWORD=<password>
MAIL_ENCRYPTION=tls

in config/mail.php

'driver' => env('MAIL_DRIVER', 'mail'),

'from' => [
    'address' => env(
        'MAIL_FROM_ADDRESS', '<username>@gmail.com'
    ),
    'name' => env(
        'MAIL_FROM_NAME', '<from_name>'
    ),
],

You can use the key parameter to list.sort():

my_list.sort(key=lambda x: x[1])

or, slightly faster,

my_list.sort(key=operator.itemgetter(1))

(As with any module, you'll need to import operator to be able to use it.)

Just like that nice warning you got, you are trying to do something that is an Anti-Pattern in React. This is a no-no. React is intended to have an unmount happen from a parent to child relationship. Now if you want a child to unmount itself, you can simulate this with a state change in the parent that is triggered by the child. let me show you in code.

class Child extends React.Component {
    constructor(){}
    dismiss() {
        this.props.unmountMe();
    } 
    render(){
        // code
    }
}

class Parent ...
    constructor(){
        super(props)
        this.state = {renderChild: true};
        this.handleChildUnmount = this.handleChildUnmount.bind(this);
    }
    handleChildUnmount(){
        this.setState({renderChild: false});
    }
    render(){
        // code
        {this.state.renderChild ? <Child unmountMe={this.handleChildUnmount} /> : null}
    }

}

this is a very simple example. but you can see a rough way to pass through to the parent an action

That being said you should probably be going through the store (dispatch action) to allow your store to contain the correct data when it goes to render

I've done error/status messages for two separate applications, both went through the store. It's the preferred method... If you'd like I can post some code as to how to do that.

EDIT: Here is how I set up a notification system using React/Redux/Typescript

Few things to note first. this is in typescript so you would need to remove the type declarations :)

I am using the npm packages lodash for operations, and classnames (cx alias) for inline classname assignment.

The beauty of this setup is I use a unique identifier for each notification when the action creates it. (e.g. notify_id). This unique ID is a Symbol(). This way if you want to remove any notification at any point in time you can because you know which one to remove. This notification system will let you stack as many as you want and they will go away when the animation is completed. I am hooking into the animation event and when it finishes I trigger some code to remove the notification. I also set up a fallback timeout to remove the notification just in case the animation callback doesn't fire.

notification-actions.ts

import { USER_SYSTEM_NOTIFICATION } from '../constants/action-types';

interface IDispatchType {
    type: string;
    payload?: any;
    remove?: Symbol;
}

export const notifySuccess = (message: any, duration?: number) => {
    return (dispatch: Function) => {
        dispatch({ type: USER_SYSTEM_NOTIFICATION, payload: { isSuccess: true, message, notify_id: Symbol(), duration } } as IDispatchType);
    };
};

export const notifyFailure = (message: any, duration?: number) => {
    return (dispatch: Function) => {
        dispatch({ type: USER_SYSTEM_NOTIFICATION, payload: { isSuccess: false, message, notify_id: Symbol(), duration } } as IDispatchType);
    };
};

export const clearNotification = (notifyId: Symbol) => {
    return (dispatch: Function) => {
        dispatch({ type: USER_SYSTEM_NOTIFICATION, remove: notifyId } as IDispatchType);
    };
};

notification-reducer.ts

const defaultState = {
    userNotifications: []
};

export default (state: ISystemNotificationReducer = defaultState, action: IDispatchType) => {
    switch (action.type) {
        case USER_SYSTEM_NOTIFICATION:
            const list: ISystemNotification[] = _.clone(state.userNotifications) || [];
            if (_.has(action, 'remove')) {
                const key = parseInt(_.findKey(list, (n: ISystemNotification) => n.notify_id === action.remove));
                if (key) {
                    // mutate list and remove the specified item
                    list.splice(key, 1);
                }
            } else {
                list.push(action.payload);
            }
            return _.assign({}, state, { userNotifications: list });
    }
    return state;
};

app.tsx

in the base render for your application you would render the notifications

render() {
    const { systemNotifications } = this.props;
    return (
        <div>
            <AppHeader />
            <div className="user-notify-wrap">
                { _.get(systemNotifications, 'userNotifications') && Boolean(_.get(systemNotifications, 'userNotifications.length'))
                    ? _.reverse(_.map(_.get(systemNotifications, 'userNotifications', []), (n, i) => <UserNotification key={i} data={n} clearNotification={this.props.actions.clearNotification} />))
                    : null
                }
            </div>
            <div className="content">
                {this.props.children}
            </div>
        </div>
    );
}

user-notification.tsx

user notification class

/*
    Simple notification class.

    Usage:
        <SomeComponent notifySuccess={this.props.notifySuccess} notifyFailure={this.props.notifyFailure} />
        these two functions are actions and should be props when the component is connect()ed

    call it with either a string or components. optional param of how long to display it (defaults to 5 seconds)
        this.props.notifySuccess('it Works!!!', 2);
        this.props.notifySuccess(<SomeComponentHere />, 15);
        this.props.notifyFailure(<div>You dun goofed</div>);

*/

interface IUserNotifyProps {
    data: any;
    clearNotification(notifyID: symbol): any;
}

export default class UserNotify extends React.Component<IUserNotifyProps, {}> {
    public notifyRef = null;
    private timeout = null;

    componentDidMount() {
        const duration: number = _.get(this.props, 'data.duration', '');
       
        this.notifyRef.style.animationDuration = duration ? `${duration}s` : '5s';

        
        // fallback incase the animation event doesn't fire
        const timeoutDuration = (duration * 1000) + 500;
        this.timeout = setTimeout(() => {
            this.notifyRef.classList.add('hidden');
            this.props.clearNotification(_.get(this.props, 'data.notify_id') as symbol);
        }, timeoutDuration);

        TransitionEvents.addEndEventListener(
            this.notifyRef,
            this.onAmimationComplete
        );
    }
    componentWillUnmount() {
        clearTimeout(this.timeout);

        TransitionEvents.removeEndEventListener(
            this.notifyRef,
            this.onAmimationComplete
        );
    }
    onAmimationComplete = (e) => {
        if (_.get(e, 'animationName') === 'fadeInAndOut') {
            this.props.clearNotification(_.get(this.props, 'data.notify_id') as symbol);
        }
    }
    handleCloseClick = (e) => {
        e.preventDefault();
        this.props.clearNotification(_.get(this.props, 'data.notify_id') as symbol);
    }
    assignNotifyRef = target => this.notifyRef = target;
    render() {
        const {data, clearNotification} = this.props;
        return (
            <div ref={this.assignNotifyRef} className={cx('user-notification fade-in-out', {success: data.isSuccess, failure: !data.isSuccess})}>
                {!_.isString(data.message) ? data.message : <h3>{data.message}</h3>}
                <div className="close-message" onClick={this.handleCloseClick}>+</div>
            </div>
        );
    }
}

There's a really good paper by Microsoft Research called To Blob or Not To Blob.

Their conclusion after a large number of performance tests and analysis is this:

• if your pictures or document are typically below 256KB in size, storing them in a database VARBINARY column is more efficient

• if your pictures or document are typically over 1 MB in size, storing them in the filesystem is more efficient (and with SQL Server 2008's FILESTREAM attribute, they're still under transactional control and part of the database)

• in between those two, it's a bit of a toss-up depending on your use

If you decide to put your pictures into a SQL Server table, I would strongly recommend using a separate table for storing those pictures - do not store the employee photo in the employee table - keep them in a separate table. That way, the Employee table can stay lean and mean and very efficient, assuming you don't always need to select the employee photo, too, as part of your queries.

For filegroups, check out Files and Filegroup Architecture for an intro. Basically, you would either create your database with a separate filegroup for large data structures right from the beginning, or add an additional filegroup later. Let's call it "LARGE_DATA".

Now, whenever you have a new table to create which needs to store VARCHAR(MAX) or VARBINARY(MAX) columns, you can specify this file group for the large data:

 CREATE TABLE dbo.YourTable
     (....... define the fields here ......)
     ON Data                   -- the basic "Data" filegroup for the regular data
     TEXTIMAGE_ON LARGE_DATA   -- the filegroup for large chunks of data

Check out the MSDN intro on filegroups, and play around with it!

On XAMPP use

D:\xampp\apache\bin>httpd -t -D DUMP_VHOSTS

This will yield errors in your configuration of the virtual hosts

in addition,if you try to use CustomActionBarTheme,make sure there is

<application android:theme="@style/CustomActionBarTheme" ... />

in AndroidManifest.xml

not

<application android:theme="@android:style/CustomActionBarTheme" ... />

You can put below property in listview tag

android:divider="@null"

(or) programmatically listview.Divider(null); here listview is ListView reference.

Assume a dataframe with 19 rows

index=range(0,19)
index

columns=['A']
test = pd.DataFrame(index=index, columns=columns)

Keeping Column A as a constant

test['A']=10

Keeping column b as a variable given by a loop

for x in range(0,19):
    test.loc[[x], 'b'] = pd.Series([x], index = [x])

You can replace the first x in pd.Series([x], index = [x]) with any value

First of all, you would have to allocate memory:

char * S = new char[R.length() + 1];

then you can use strcpy with S and R.c_str():

std::strcpy(S,R.c_str());

You can also use R.c_str() if the string doesn't get changed or the c string is only used once. However, if S is going to be modified, you should copy the string, as writing to R.c_str() results in undefined behavior.

Note: Instead of strcpy you can also use str::copy.

test_connection("ip", port);


public void test_connection(String hostname, int portno) {
  IPAddress ipa = (IPAddress)Dns.GetHostAddresses(hostname)[0];
  try {
    System.Net.Sockets.Socket sock = new System.Net.Sockets.Socket(System.Net.Sockets.AddressFamily.InterNetwork, System.Net.Sockets.SocketType.Stream, System.Net.Sockets.ProtocolType.Tcp);
   sock.Connect(ipa, portno);
   if (sock.Connected == true) {
     MessageBox.Show("Port is in use");
   }

   sock.Close();
 }
 catch (System.Net.Sockets.SocketException ex) {
   if (ex.ErrorCode == 10060) {
     MessageBox.Show("No connection.");
   }
 }
}

The hexadecimal value you are looking for is %2B

To get it automatically in PHP run your string through urlencode($stringVal). And then run it rhough urldecode($stringVal) to get it back.

If you want the JavaScript to handle it, use escape( str )

Edit

After @bobince's comment I did more reading and he is correct. Use encodeURIComponent(str) and decodeURIComponent(str). Escape will not convert the characters, only escape them with \'s

I was trying the above examples and couldn't get them to sync with a (non-master) branch I had created on a different computer. For background, I created this repository on computer A (git v 1.8) and then cloned the repository onto computer B (git 2.14). I made all my changes on comp B, but when I tried to pull the changes onto computer A I was unable to do so, getting the same above error. Similar to the above solutions, I had to do:

git branch --set-upstream-to=origin/<my_repository_name> 
git pull

slightly different but hopefully helps someone

Add this filter:

app.filter('unique', function () {
return function ( collection, keyname) {
var output = [],
    keys = []
    found = [];

if (!keyname) {

    angular.forEach(collection, function (row) {
        var is_found = false;
        angular.forEach(found, function (foundRow) {

            if (foundRow == row) {
                is_found = true;                            
            }
        });

        if (is_found) { return; }
        found.push(row);
        output.push(row);

    });
}
else {

    angular.forEach(collection, function (row) {
        var item = row[keyname];
        if (item === null || item === undefined) return;
        if (keys.indexOf(item) === -1) {
            keys.push(item);
            output.push(row);
        }
    });
}

return output;
};
});

Update your markup:

<select ng-model="orderProp" >
   <option ng-repeat="place in places | unique" value="{{place.category}}">{{place.category}}</option>
</select>

I also had some problems after updating Xcode.

I fixed it by opening Xcode Preferences (?+,), going to Accounts → View Details. Then select all provisioning profiles and delete them with backspace (note: they can't be removed in Xcode 7.2). Restart Xcode, else the list doesn't seem to update properly.

Now click the Download all button, and you should have all provisioning profiles that you defined in the Member center back in Xcode. Don't worry about the Xcode-generated ones (Prefixed with XC:), Xcode will regenerate them if necessary. Restart Xcode again.

Now go to the Code Signing section in your Build Settings and select the correct profile and cert.

Why this happens at all? No idea... I gave up on understanding Apple's policies regarding app signing.

Simplest way to get name from relative path or full path is using

import org.apache.commons.io.FilenameUtils; FilenameUtils.getBaseName(definitionFilePath)

NOTE: not for Windows

Using ren-1.0 the correct form is:

"ren *.*" "#2.jpg"

From man ren

The replacement pattern is another filename with embedded wildcard indexes, each of which consists of the character # followed by a digit from 1 to 9. In the new name of a matching file, the wildcard indexes are replaced by the actual characters that matched the referenced wildcards in the original filename.

and

Note that the shell normally expands the wildcards * and ?, which in the case of ren is undesirable. Thus, in most cases it is necessary to enclose the search pattern in quotes.

At Microsoft website, it shows that native OLEDB provider is applied to SQL server directly and another OLEDB provider called OLEDB Provider for ODBC to access other Database, such as Sysbase, DB2 etc. There are different kinds of component under OLEDB Provider. See Distributed Queries on MSDN for more.

I think, you could also do something like...

setTimeout(function(){
    $(".message-class").trigger("click");
}, 5000);

and do your animated effects on the event-click...

$(".message-class").click(function() {
    //your event-code
});

Greetings,

This is working for me using this Bootsrap Datetimepiker, it returns the value as it is shown in the datepicker input, e.g. 2019-04-11

$('#myDateTimePicker').on('click,focusout', function (){
    var myDate = $("#myDateTimePicker").val();
    //console.log(myDate);
    //alert(myDate);
});

Using a shebang line to invoke the appropriate interpreter is not just for BASH. You can use the shebang for any interpreted language on your system such as Perl, Python, PHP (CLI) and many others. By the way, the shebang

#!/bin/sh -

(it can also be two dashes, i.e. --) ends bash options everything after will be treated as filenames and arguments.

Using the env command makes your script portable and allows you to setup custom environments for your script hence portable scripts should use

#!/usr/bin/env bash

Or for whatever the language such as for Perl

#!/usr/bin/env perl

Be sure to look at the man pages for bash:

man bash

and env:

man env

Note: On Debian and Debian-based systems, like Ubuntu, sh is linked to dash not bash. As all system scripts use sh. This allows bash to grow and the system to stay stable, according to Debian.

Also, to keep invocation *nix like I never use file extensions on shebang invoked scripts, as you cannot omit the extension on invocation on executables as you can on Windows. The file command can identify it as a script.

There are two ways to customize fonts :

!!! my custom font in assets/fonts/iran_sans.ttf

Way 1 : Refrection Typeface.class ||| best way

call FontsOverride.setDefaultFont() in class extends Application, This code will cause all software fonts to be changed, even Toasts fonts

AppController.java

public class AppController extends Application {

    @Override
    public void onCreate() {
        super.onCreate();

        //Initial Font
        FontsOverride.setDefaultFont(getApplicationContext(), "MONOSPACE", "fonts/iran_sans.ttf");

    }
}

FontsOverride.java

public class FontsOverride {

    public static void setDefaultFont(Context context, String staticTypefaceFieldName, String fontAssetName) {
        final Typeface regular = Typeface.createFromAsset(context.getAssets(), fontAssetName);
        replaceFont(staticTypefaceFieldName, regular);
    }

    private static void replaceFont(String staticTypefaceFieldName, final Typeface newTypeface) {
        try {
            final Field staticField = Typeface.class.getDeclaredField(staticTypefaceFieldName);
            staticField.setAccessible(true);
            staticField.set(null, newTypeface);
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
    }
}

Way 2: use setTypeface

for special view just call setTypeface() to change font.

CTextView.java

public class CTextView extends TextView {

    public CTextView(Context context) {
        super(context);
        init(context,null);
    }

    public CTextView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        init(context,attrs);
    }

    public CTextView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(context,attrs);
    }

    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    public CTextView(Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
        init(context,attrs);
    }

    public void init(Context context, @Nullable AttributeSet attrs) {

        if (isInEditMode())
            return;

        // use setTypeface for change font this view
        setTypeface(FontUtils.getTypeface("fonts/iran_sans.ttf"));

    }
}

FontUtils.java

public class FontUtils {

    private static Hashtable<String, Typeface> fontCache = new Hashtable<>();

    public static Typeface getTypeface(String fontName) {
        Typeface tf = fontCache.get(fontName);
        if (tf == null) {
            try {
                tf = Typeface.createFromAsset(AppController.getInstance().getApplicationContext().getAssets(), fontName);
            } catch (Exception e) {
                e.printStackTrace();
                return null;
            }
            fontCache.put(fontName, tf);
        }
        return tf;
    }

}

There is a lot more to coalesce than just a replacement for ISNULL. I completely agree that the official "documentation" of coalesce is vague and unhelpful. This article helps a lot. http://www.mssqltips.com/sqlservertip/1521/the-many-uses-of-coalesce-in-sql-server/

You can simply declare them as local functions in a razor block (i.e. @{}).

@{
    int Add(int x, int y)
    {
        return x + y;
    }
}

<div class="container">
    <p>
        @Add(2, 5)
    </p>
</div>

At least in PostgreSQL you can use the column number in the resultset in your GROUP BY clause:

SELECT 
 itemName as ItemName,
 substring(itemName, 1,1) as FirstLetter,
 Count(itemName)
FROM table1
GROUP BY 1, 2

Of course this starts to be a pain if you are doing this interactively and you edit the query to change the number or order of columns in the result. But still.

could be a shorthand for React.Fragment

you can use the Common IO library which can get you the Base name of your file and the Extension.

 String fileUrl=":/storage/sdcard0/DCIM/Camera/1414240995236.jpg";
      String fileName=FilenameUtils.getBaseName(fileUrl);
           String    fileExtention=FilenameUtils.getExtension(fileUrl);
//this will return filename:1414240995236 and fileExtention:jpg

Pseudo code, something like:

CASE
  When CHARINDEX('lactulose', dbo.Table.Column) > 0 Then 'BP Medication'
ELSE ''
END AS 'Medication Type'

This does not care where the keyword is found in the list and avoids depending on formatting of spaces and commas.

If you want to remove the default value constraint, you can do:

ALTER TABLE <table> ALTER COLUMN <column> DROP DEFAULT;

Assuming there is a column named business:

SELECT Business, COUNT(*) FROM eventsTable GROUP BY Business

For my needs I define static array, instead of impossible const and it works: public static string[] Titles = { "German", "Spanish", "Corrects", "Wrongs" };

The output file needs to be opened in binary mode:

f = open('varstor.txt','w')

needs to be:

f = open('varstor.txt','wb')

If a computer can run it, a suitably motivated human can reverse-engineer it.

You could also use Py4J. There is an example on the frontpage and lots of documentation, but essentially, you just call Java methods from your python code as if they were python methods:

from py4j.java_gateway import JavaGateway
gateway = JavaGateway()                        # connect to the JVM
java_object = gateway.jvm.mypackage.MyClass()  # invoke constructor
other_object = java_object.doThat()
other_object.doThis(1,'abc')
gateway.jvm.java.lang.System.out.println('Hello World!') # call a static method

As opposed to Jython, one part of Py4J runs in the Python VM so it is always "up to date" with the latest version of Python and you can use libraries that do not run well on Jython (e.g., lxml). The other part runs in the Java VM you want to call.

The communication is done through sockets instead of JNI and Py4J has its own protocol (to optimize certain cases, to manage memory, etc.)

Disclaimer: I am the author of Py4J

Escaped percent sign is double percent (%%):

System.out.printf("2 out of 10 is %d%%", 20);

As per new Interface follow these steps

1. Go to Google Play Developer Console
2. Select your app you want to un-publish
3. From the left Navigation Release >> Setup >> Advance Settings
4. In the App Availability Check on Unpublished Radio button

This question asked long before. But I thought following information will useful for newbies. Actually you can easily get the values from class name like this.

Sub ExtractLastValue()

Set objIE = CreateObject("InternetExplorer.Application")

objIE.Top = 0
objIE.Left = 0
objIE.Width = 800
objIE.Height = 600

objIE.Visible = True

objIE.Navigate ("https://uk.investing.com/rates-bonds/financial-futures/")

Do
DoEvents
Loop Until objIE.readystate = 4

MsgBox objIE.document.getElementsByClassName("pid-8907-last")(0).innerText

End Sub

And if you are new to web scraping please read this blog post.

Web Scraping - Basics

And also there are various techniques to extract data from web pages. This article explain few of them with examples.

Web Scraping - Collecting Data From a Webpage

A minor simplification on the example by @naresh. Should deal with permission issues and offer some clarification.

$data = '<base64_encoded_string>';

$data = base64_decode($data);

$img = imagecreatefromstring($data);

header('Content-Type: image/png');

$file = '<path_to_home_or_user_directory>/decoded_images/test.png';

imagepng($img, $file);

imagedestroy($img);

Try below solution

ng-if="details.Payment[0].Status != '0'"

Use below condition(! prefix with true condition) instead of above

ng-if="!details.Payment[0].Status == '0'"

After reading through erickson's suggestions, and gleaning what I could from a couple other postings and this example here, I've attempted to update Doug's code with the recommended changes. Feel free to edit to make it better.

• Initialization Vector is no longer fixed
• encryption key is derived using code from erickson
• 8 byte salt is generated in setupEncrypt() using SecureRandom()
• decryption key is generated from the encryption salt and password
• decryption cipher is generated from decryption key and initialization vector
• removed hex twiddling in lieu of org.apache.commons codec Hex routines

Some notes: This uses a 128 bit encryption key - java apparently won't do 256 bit encryption out-of-the-box. Implementing 256 requires installing some extra files into the java install directory.

Also, I'm not a crypto person. Take heed.

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.AlgorithmParameters;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.InvalidParameterSpecException;
import java.security.spec.KeySpec;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.CipherOutputStream;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.DecoderException;
import org.apache.commons.codec.binary.Hex;

public class Crypto
{
    String mPassword = null;
    public final static int SALT_LEN = 8;
    byte [] mInitVec = null;
    byte [] mSalt = null;
    Cipher mEcipher = null;
    Cipher mDecipher = null;
    private final int KEYLEN_BITS = 128; // see notes below where this is used.
    private final int ITERATIONS = 65536;
    private final int MAX_FILE_BUF = 1024;

    /**
     * create an object with just the passphrase from the user. Don't do anything else yet 
     * @param password
     */
    public Crypto (String password)
    {
        mPassword = password;
    }

    /**
     * return the generated salt for this object
     * @return
     */
    public byte [] getSalt ()
    {
        return (mSalt);
    }

    /**
     * return the initialization vector created from setupEncryption
     * @return
     */
    public byte [] getInitVec ()
    {
        return (mInitVec);
    }

    /**
     * debug/print messages
     * @param msg
     */
    private void Db (String msg)
    {
        System.out.println ("** Crypt ** " + msg);
    }

    /**
     * this must be called after creating the initial Crypto object. It creates a salt of SALT_LEN bytes
     * and generates the salt bytes using secureRandom().  The encryption secret key is created 
     * along with the initialization vectory. The member variable mEcipher is created to be used
     * by the class later on when either creating a CipherOutputStream, or encrypting a buffer
     * to be written to disk.
     *  
     * @throws NoSuchAlgorithmException
     * @throws InvalidKeySpecException
     * @throws NoSuchPaddingException
     * @throws InvalidParameterSpecException
     * @throws IllegalBlockSizeException
     * @throws BadPaddingException
     * @throws UnsupportedEncodingException
     * @throws InvalidKeyException
     */
    public void setupEncrypt () throws NoSuchAlgorithmException, 
                                                           InvalidKeySpecException, 
                                                           NoSuchPaddingException, 
                                                           InvalidParameterSpecException, 
                                                           IllegalBlockSizeException, 
                                                           BadPaddingException, 
                                                           UnsupportedEncodingException, 
                                                           InvalidKeyException
    {
        SecretKeyFactory factory = null;
        SecretKey tmp = null;

        // crate secureRandom salt and store  as member var for later use
         mSalt = new byte [SALT_LEN];
        SecureRandom rnd = new SecureRandom ();
        rnd.nextBytes (mSalt);
        Db ("generated salt :" + Hex.encodeHexString (mSalt));

        factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");

        /* Derive the key, given password and salt. 
         * 
         * in order to do 256 bit crypto, you have to muck with the files for Java's "unlimted security"
         * The end user must also install them (not compiled in) so beware. 
         * see here:  http://www.javamex.com/tutorials/cryptography/unrestricted_policy_files.shtml
         */
        KeySpec spec = new PBEKeySpec (mPassword.toCharArray (), mSalt, ITERATIONS, KEYLEN_BITS);
        tmp = factory.generateSecret (spec);
        SecretKey secret = new SecretKeySpec (tmp.getEncoded(), "AES");

        /* Create the Encryption cipher object and store as a member variable
         */
        mEcipher = Cipher.getInstance ("AES/CBC/PKCS5Padding");
        mEcipher.init (Cipher.ENCRYPT_MODE, secret);
        AlgorithmParameters params = mEcipher.getParameters ();

        // get the initialization vectory and store as member var 
        mInitVec = params.getParameterSpec (IvParameterSpec.class).getIV();

        Db ("mInitVec is :" + Hex.encodeHexString (mInitVec));
    }



    /**
     * If a file is being decrypted, we need to know the pasword, the salt and the initialization vector (iv). 
     * We have the password from initializing the class. pass the iv and salt here which is
     * obtained when encrypting the file initially.
     *   
     * @param initvec
     * @param salt
     * @throws NoSuchAlgorithmException
     * @throws InvalidKeySpecException
     * @throws NoSuchPaddingException
     * @throws InvalidKeyException
     * @throws InvalidAlgorithmParameterException
     * @throws DecoderException
     */
    public void setupDecrypt (String initvec, String salt) throws NoSuchAlgorithmException, 
                                                                                       InvalidKeySpecException, 
                                                                                       NoSuchPaddingException, 
                                                                                       InvalidKeyException, 
                                                                                       InvalidAlgorithmParameterException, 
                                                                                       DecoderException
    {
        SecretKeyFactory factory = null;
        SecretKey tmp = null;
        SecretKey secret = null;

        // since we pass it as a string of input, convert to a actual byte buffer here
        mSalt = Hex.decodeHex (salt.toCharArray ());
       Db ("got salt " + Hex.encodeHexString (mSalt));

        // get initialization vector from passed string
        mInitVec = Hex.decodeHex (initvec.toCharArray ());
        Db ("got initvector :" + Hex.encodeHexString (mInitVec));


        /* Derive the key, given password and salt. */
        // in order to do 256 bit crypto, you have to muck with the files for Java's "unlimted security"
        // The end user must also install them (not compiled in) so beware. 
        // see here: 
      // http://www.javamex.com/tutorials/cryptography/unrestricted_policy_files.shtml
        factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
        KeySpec spec = new PBEKeySpec(mPassword.toCharArray (), mSalt, ITERATIONS, KEYLEN_BITS);

        tmp = factory.generateSecret(spec);
        secret = new SecretKeySpec(tmp.getEncoded(), "AES");

        /* Decrypt the message, given derived key and initialization vector. */
        mDecipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        mDecipher.init(Cipher.DECRYPT_MODE, secret, new IvParameterSpec(mInitVec));
    }


    /**
     * This is where we write out the actual encrypted data to disk using the Cipher created in setupEncrypt().
     * Pass two file objects representing the actual input (cleartext) and output file to be encrypted.
     * 
     * there may be a way to write a cleartext header to the encrypted file containing the salt, but I ran
     * into uncertain problems with that. 
     *  
     * @param input - the cleartext file to be encrypted
     * @param output - the encrypted data file
     * @throws IOException
     * @throws IllegalBlockSizeException
     * @throws BadPaddingException
     */
    public void WriteEncryptedFile (File input, File output) throws 
                                                                                          IOException, 
                                                                                          IllegalBlockSizeException, 
                                                                                          BadPaddingException
    {
        FileInputStream fin;
        FileOutputStream fout;
        long totalread = 0;
        int nread = 0;
        byte [] inbuf = new byte [MAX_FILE_BUF];

        fout = new FileOutputStream (output);
        fin = new FileInputStream (input);

        while ((nread = fin.read (inbuf)) > 0 )
        {
            Db ("read " + nread + " bytes");
            totalread += nread;

            // create a buffer to write with the exact number of bytes read. Otherwise a short read fills inbuf with 0x0
            // and results in full blocks of MAX_FILE_BUF being written. 
            byte [] trimbuf = new byte [nread];
            for (int i = 0; i < nread; i++)
                trimbuf[i] = inbuf[i];

            // encrypt the buffer using the cipher obtained previosly
            byte [] tmp = mEcipher.update (trimbuf);

            // I don't think this should happen, but just in case..
            if (tmp != null)
                fout.write (tmp);
        }

        // finalize the encryption since we've done it in blocks of MAX_FILE_BUF
        byte [] finalbuf = mEcipher.doFinal ();
        if (finalbuf != null)
            fout.write (finalbuf);

        fout.flush();
        fin.close();
        fout.close();

        Db ("wrote " + totalread + " encrypted bytes");
    }


    /**
     * Read from the encrypted file (input) and turn the cipher back into cleartext. Write the cleartext buffer back out
     * to disk as (output) File.
     * 
     * I left CipherInputStream in here as a test to see if I could mix it with the update() and final() methods of encrypting
     *  and still have a correctly decrypted file in the end. Seems to work so left it in.
     *  
     * @param input - File object representing encrypted data on disk 
     * @param output - File object of cleartext data to write out after decrypting
     * @throws IllegalBlockSizeException
     * @throws BadPaddingException
     * @throws IOException
     */
    public void ReadEncryptedFile (File input, File output) throws 
                                                                                                                                            IllegalBlockSizeException, 
                                                                                                                                            BadPaddingException, 
                                                                                                                                            IOException
    {
        FileInputStream fin; 
        FileOutputStream fout;
        CipherInputStream cin;
        long totalread = 0;
        int nread = 0;
        byte [] inbuf = new byte [MAX_FILE_BUF];

        fout = new FileOutputStream (output);
        fin = new FileInputStream (input);

        // creating a decoding stream from the FileInputStream above using the cipher created from setupDecrypt()
        cin = new CipherInputStream (fin, mDecipher);

        while ((nread = cin.read (inbuf)) > 0 )
        {
            Db ("read " + nread + " bytes");
            totalread += nread;

            // create a buffer to write with the exact number of bytes read. Otherwise a short read fills inbuf with 0x0
            byte [] trimbuf = new byte [nread];
            for (int i = 0; i < nread; i++)
                trimbuf[i] = inbuf[i];

            // write out the size-adjusted buffer
            fout.write (trimbuf);
        }

        fout.flush();
        cin.close();
        fin.close ();       
        fout.close();   

        Db ("wrote " + totalread + " encrypted bytes");
    }


    /**
     * adding main() for usage demonstration. With member vars, some of the locals would not be needed
     */
    public static void main(String [] args)
    {

        // create the input.txt file in the current directory before continuing
        File input = new File ("input.txt");
        File eoutput = new File ("encrypted.aes");
        File doutput = new File ("decrypted.txt");
        String iv = null;
        String salt = null;
        Crypto en = new Crypto ("mypassword");

        /*
         * setup encryption cipher using password. print out iv and salt
         */
        try
      {
          en.setupEncrypt ();
          iv = Hex.encodeHexString (en.getInitVec ()).toUpperCase ();
          salt = Hex.encodeHexString (en.getSalt ()).toUpperCase ();
      }
      catch (InvalidKeyException e)
      {
          e.printStackTrace();
      }
      catch (NoSuchAlgorithmException e)
      {
          e.printStackTrace();
      }
      catch (InvalidKeySpecException e)
      {
          e.printStackTrace();
      }
      catch (NoSuchPaddingException e)
      {
          e.printStackTrace();
      }
      catch (InvalidParameterSpecException e)
      {
          e.printStackTrace();
      }
      catch (IllegalBlockSizeException e)
      {
          e.printStackTrace();
      }
      catch (BadPaddingException e)
      {
          e.printStackTrace();
      }
      catch (UnsupportedEncodingException e)
      {
          e.printStackTrace();
      }

        /*
         * write out encrypted file
         */
        try
      {
          en.WriteEncryptedFile (input, eoutput);
          System.out.printf ("File encrypted to " + eoutput.getName () + "\niv:" + iv + "\nsalt:" + salt + "\n\n");
      }
      catch (IllegalBlockSizeException e)
      {
          e.printStackTrace();
      }
      catch (BadPaddingException e)
      {
          e.printStackTrace();
      }
      catch (IOException e)
      {
          e.printStackTrace();
      }


        /*
         * decrypt file
         */
        Crypto dc = new Crypto ("mypassword");
        try
      {
          dc.setupDecrypt (iv, salt);
      }
      catch (InvalidKeyException e)
      {
          e.printStackTrace();
      }
      catch (NoSuchAlgorithmException e)
      {
          e.printStackTrace();
      }
      catch (InvalidKeySpecException e)
      {
          e.printStackTrace();
      }
      catch (NoSuchPaddingException e)
      {
          e.printStackTrace();
      }
      catch (InvalidAlgorithmParameterException e)
      {
          e.printStackTrace();
      }
      catch (DecoderException e)
      {
          e.printStackTrace();
      }

        /*
         * write out decrypted file
         */
        try
      {
          dc.ReadEncryptedFile (eoutput, doutput);
          System.out.println ("decryption finished to " + doutput.getName ());
      }
      catch (IllegalBlockSizeException e)
      {
          e.printStackTrace();
      }
      catch (BadPaddingException e)
      {
          e.printStackTrace();
      }
      catch (IOException e)
      {
          e.printStackTrace();
      }
   }


}

The problem will be that you cannot represent 0.575 exactly as a binary floating point number (eg a double). Though I don't know exactly it seems that the representation closest is probably just a bit lower and so when rounding it uses the true representation and rounds down.

If you want to avoid this problem then use a more appropriate data type. decimal will do what you want:

Math.Round(0.575M, 2, MidpointRounding.AwayFromZero)

Result: 0.58

The reason that 0.75 does the right thing is that it is easy to represent in binary floating point since it is simple 1/2 + 1/4 (ie 2^-1 +2^-2). In general any finite sum of powers of two can be represented in binary floating point. Exceptions are when your powers of 2 span too great a range (eg 2^100+2 is not exactly representable).

Edit to add:

Formatting doubles for output in C# might be of interest in terms of understanding why its so hard to understand that 0.575 is not really 0.575. The DoubleConverter in the accepted answer will show that 0.575 as an Exact String is 0.5749999999999999555910790149937383830547332763671875 You can see from this why rounding give 0.57.

all answers are great, and it seems that no more answer is needed but I just wonted to point out something about && operator called dependent condition

In expressions using operator &&, a condition—we’ll call this the dependent condition—may require another condition to be true for the evaluation of the dependent condition to be meaningful.

In this case, the dependent condition should be placed after the && operator to prevent errors.

Consider the expression (i != 0) && (10 / i == 2). The dependent condition (10 / i == 2) must appear after the && operator to prevent the possibility of division by zero.

another example (myObject != null) && (myObject.getValue() == somevaluse)

and another thing: && and || are called short-circuit evaluation because the second argument is executed or evaluated only if the first argument does not suffice to determine the value of the expression

References: Java™ How To Program (Early Objects), Tenth Edition

Mod just means you take the remainder after performing the division. Since 4 goes into 2 zero times, you end up with a remainder of 2.

I got rid of the same problem by doing following steps:

• Xcode->Product->Clean Build Folder (hold alt key on Product to see it)
• Open Xcode->Window->Organizer and select Projects tab. Then find your project and delete derived data of the project.

I am assuming you mean using XSD files. Surprisingly there aren't many python XML libraries that support this. lxml does however. Check Validation with lxml. The page also lists how to use lxml to validate with other schema types.

Laravel Collection implements the PHP ArrayAccess interface (which is why using foreach is possible in the first place).

If you have the key already you can just use PHP unset.

I prefer this, because it clearly modifies the collection in place, and is easy to remember.

foreach ($collection as $key => $value) {
    unset($collection[$key]);
}

I had the same problem. So here is the real answer: Mount the system under /proc. Here is my command:

mount -o rw,remount /proc /system

It works, and in fact is the only way I can overcome the Read-only System problem.

[INFO] BUILD SUCCESS
Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF8 Anyway, it works for me:)

Our HTML:

<div id="addnew">
    <input type="text" id="id">
    <input type="text" id="content">
    <input type="button" value="Add" id="submit">
</div>

<div id="check">
    <input type="text" id="input">
    <input type="button" value="Search" id="search">
</div>

JS (writing to the txt file):

function writeToFile(d1, d2){
    var fso = new ActiveXObject("Scripting.FileSystemObject");
    var fh = fso.OpenTextFile("data.txt", 8, false, 0);
    fh.WriteLine(d1 + ',' + d2);
    fh.Close();
}
var submit = document.getElementById("submit");
submit.onclick = function () {
    var id      = document.getElementById("id").value;
    var content = document.getElementById("content").value;
    writeToFile(id, content);
}

checking a particular row:

function readFile(){
    var fso = new ActiveXObject("Scripting.FileSystemObject");
    var fh = fso.OpenTextFile("data.txt", 1, false, 0);
    var lines = "";
    while (!fh.AtEndOfStream) {
        lines += fh.ReadLine() + "\r";
    }
    fh.Close();
    return lines;
}
var search = document.getElementById("search");
search.onclick = function () {
    var input   = document.getElementById("input").value;
    if (input != "") {
        var text    = readFile();
        var lines   = text.split("\r");
        lines.pop();
        var result;
        for (var i = 0; i < lines.length; i++) {
            if (lines[i].match(new RegExp(input))) {
                result = "Found: " + lines[i].split(",")[1];
            }
        }
        if (result) { alert(result); }
        else { alert(input + " not found!"); }
    }
}

Put these inside a .hta file and run it. Tested on W7, IE11. It's working. Also if you want me to explain what's going on, say so.

The problem is that they're all the same exact list in memory. When you use the [x]*n syntax, what you get is a list of n many x objects, but they're all references to the same object. They're not distinct instances, rather, just n references to the same instance.

To make a list of 3 different lists, do this:

x = [[] for i in range(3)]

This gives you 3 separate instances of [], which is what you want

[[]]*n is similar to

l = []
x = []
for i in range(n):
    x.append(l)

While [[] for i in range(3)] is similar to:

x = []
for i in range(n):
    x.append([])   # appending a new list!

In [20]: x = [[]] * 4

In [21]: [id(i) for i in x]
Out[21]: [164363948, 164363948, 164363948, 164363948] # same id()'s for each list,i.e same object


In [22]: x=[[] for i in range(4)]

In [23]: [id(i) for i in x]
Out[23]: [164382060, 164364140, 164363628, 164381292] #different id(), i.e unique objects this time

Verify user account, you are working on. If any system user has no permissions for installation packages, npm particulary also is showing this message.

in your main layout put this in the head at the bottom of everything

@stack('styles')

and in your view put this

@push('styles')

    <link rel="stylesheet" href="{{ asset('css/app.css') }}">

@endpush

basically a placeholder so the links will appear on your main layout, and you can see custom css files on different pages

Maybe you're looking for something like this:

def tableize(df):
    if not isinstance(df, pd.DataFrame):
        return
    df_columns = df.columns.tolist() 
    max_len_in_lst = lambda lst: len(sorted(lst, reverse=True, key=len)[0])
    align_center = lambda st, sz: "{0}{1}{0}".format(" "*(1+(sz-len(st))//2), st)[:sz] if len(st) < sz else st
    align_right = lambda st, sz: "{0}{1} ".format(" "*(sz-len(st)-1), st) if len(st) < sz else st
    max_col_len = max_len_in_lst(df_columns)
    max_val_len_for_col = dict([(col, max_len_in_lst(df.iloc[:,idx].astype('str'))) for idx, col in enumerate(df_columns)])
    col_sizes = dict([(col, 2 + max(max_val_len_for_col.get(col, 0), max_col_len)) for col in df_columns])
    build_hline = lambda row: '+'.join(['-' * col_sizes[col] for col in row]).join(['+', '+'])
    build_data = lambda row, align: "|".join([align(str(val), col_sizes[df_columns[idx]]) for idx, val in enumerate(row)]).join(['|', '|'])
    hline = build_hline(df_columns)
    out = [hline, build_data(df_columns, align_center), hline]
    for _, row in df.iterrows():
        out.append(build_data(row.tolist(), align_right))
    out.append(hline)
    return "\n".join(out)


df = pd.DataFrame([[1, 2, 3], [11111, 22, 333]], columns=['a', 'b', 'c'])
print tableize(df)

Output:
+-------+----+-----+
|    a  |  b |   c |
+-------+----+-----+
|     1 |  2 |   3 |
| 11111 | 22 | 333 |
+-------+----+-----+

Auto-incrementing the index in a loop:

myArr[(len(myArr)+1)]={"key":"val"}

I you have the char '9', it will store its ASCII code, so to get the int value, you have 2 ways

char x = '9';
int y = Character.getNumericValue(x);   //use a existing function
System.out.println(y + " " + (y + 1));  // 9  10

or

char x = '9';
int y = x - '0';                        // substract '0' code to get the difference
System.out.println(y + " " + (y + 1));  // 9  10

And it fact, this works also :

char x = 9;
System.out.println(">" + x + "<");     //>  < prints a horizontal tab
int y = (int) x;
System.out.println(y + " " + (y + 1)); //9 10

You store the 9 code, which corresponds to a horizontal tab (you can see when print as String, bu you can also use it as int as you see above

Use a subquery:

SELECT * FROM (
    SELECT * FROM users ORDER BY RAND() LIMIT 20
) u
ORDER BY name

or a join to itself:

SELECT * FROM users u1
INNER JOIN (
    SELECT id FROM users ORDER BY RAND() LIMIT 20
) u2 USING(id)
ORDER BY u1.name

I got this exception when I set url in query like "example.com/files/text.txt". Ive changed url to "http://example.com/files/text.txt" and this exception dissapeared.

The value of __FILE__ is a relative path that is created and stored (but never updated) when your file is loaded. This means that if you have any calls to Dir.chdir anywhere else in your application, this path will expand incorrectly.

puts __FILE__
Dir.chdir '../../'
puts __FILE__

One workaround to this problem is to store the expanded value of __FILE__ outside of any application code. As long as your require statements are at the top of your definitions (or at least before any calls to Dir.chdir), this value will continue to be useful after changing directories.

$MY_FILE_PATH = File.expand_path(File.dirname(__FILE__))

# open class and do some stuff that changes directory

puts $MY_FILE_PATH

Try something like this

String filePath = new File("").getAbsolutePath();
filePath.concat("path to the property file");

So your new file points to the path where it is created, usually your project home folder.

[EDIT]

As @cmc said,

    String basePath = new File("").getAbsolutePath();
    System.out.println(basePath);

    String path = new File("src/main/resources/conf.properties")
                                                           .getAbsolutePath();
    System.out.println(path);

Both give the same value.

What about the Checked event? Combine that with AttachedCommandBehaviors or something similar, and a DelegateCommand to get a function fired in your viewmodel everytime that event is called.

I had this same problem, but the solution for me was that I was pointing to the wrong web service. I had updated the web reference correctly. But we store the URl for the service in an encrypted file, and I didn't update the file with the correct service encrypted.

But all these suggestions really helped me to realize where to go for debugging.

Thanks!

Even better than Gayan Dissanayake pointed out.

/^[-\w\s]+$/

Now ^[a-zA-Z0-9]+$ can be represented as ^\w+$

You may want to use \s instead of space. Note that \s takes care of whitespace and not only one space character.

I got the same error and the cause was the directory:

U:.....WEB\WebRoot\WEB-INF\classes\com\yourcompany\cc\dao

was corrupted(directory or file not readable or damaged).. solved with

• renaming the directory WEB-INF\classes as WEB-INF\classes_old
• Eclipse's Project menu--> Clean (to recreate directories)
• redeploy --> restart server.

You can use set in a class like below and set to input text class
CSS:

 .place-holder-center::placeholder {
        text-align: center;
    }

HTML:

<input type="text" class="place-holder-center">

I'd have to agree with what you've been hearing. When we benchmark our cluster (xhpl and such), we always get significantly better performance with processes over threads. </anecdote>

In Guava, this is easy:

Strings.padStart("string", 10, ' ');
Strings.padEnd("string", 10, ' ');

Another solution similar to Loki Astari's answer, in C++11. Rows here are std::tuples of a given type. The code scans one line, then scans until each delimiter, and then converts and dumps the value directly into the tuple (with a bit of template code).

for (auto row : csv<std::string, int, float>(file, ',')) {
    std::cout << "first col: " << std::get<0>(row) << std::endl;
}

Advanges:

• quite clean and simple to use, only C++11.
• automatic type conversion into std::tuple<t1, ...> via operator>>.

What's missing:

• escaping and quoting
• no error handling in case of malformed CSV.

The main code:

#include <iterator>
#include <sstream>
#include <string>

namespace csvtools {
    /// Read the last element of the tuple without calling recursively
    template <std::size_t idx, class... fields>
    typename std::enable_if<idx >= std::tuple_size<std::tuple<fields...>>::value - 1>::type
    read_tuple(std::istream &in, std::tuple<fields...> &out, const char delimiter) {
        std::string cell;
        std::getline(in, cell, delimiter);
        std::stringstream cell_stream(cell);
        cell_stream >> std::get<idx>(out);
    }

    /// Read the @p idx-th element of the tuple and then calls itself with @p idx + 1 to
    /// read the next element of the tuple. Automatically falls in the previous case when
    /// reaches the last element of the tuple thanks to enable_if
    template <std::size_t idx, class... fields>
    typename std::enable_if<idx < std::tuple_size<std::tuple<fields...>>::value - 1>::type
    read_tuple(std::istream &in, std::tuple<fields...> &out, const char delimiter) {
        std::string cell;
        std::getline(in, cell, delimiter);
        std::stringstream cell_stream(cell);
        cell_stream >> std::get<idx>(out);
        read_tuple<idx + 1, fields...>(in, out, delimiter);
    }
}

/// Iterable csv wrapper around a stream. @p fields the list of types that form up a row.
template <class... fields>
class csv {
    std::istream &_in;
    const char _delim;
public:
    typedef std::tuple<fields...> value_type;
    class iterator;

    /// Construct from a stream.
    inline csv(std::istream &in, const char delim) : _in(in), _delim(delim) {}

    /// Status of the underlying stream
    /// @{
    inline bool good() const {
        return _in.good();
    }
    inline const std::istream &underlying_stream() const {
        return _in;
    }
    /// @}

    inline iterator begin();
    inline iterator end();
private:

    /// Reads a line into a stringstream, and then reads the line into a tuple, that is returned
    inline value_type read_row() {
        std::string line;
        std::getline(_in, line);
        std::stringstream line_stream(line);
        std::tuple<fields...> retval;
        csvtools::read_tuple<0, fields...>(line_stream, retval, _delim);
        return retval;
    }
};

/// Iterator; just calls recursively @ref csv::read_row and stores the result.
template <class... fields>
class csv<fields...>::iterator {
    csv::value_type _row;
    csv *_parent;
public:
    typedef std::input_iterator_tag iterator_category;
    typedef csv::value_type         value_type;
    typedef std::size_t             difference_type;
    typedef csv::value_type *       pointer;
    typedef csv::value_type &       reference;

    /// Construct an empty/end iterator
    inline iterator() : _parent(nullptr) {}
    /// Construct an iterator at the beginning of the @p parent csv object.
    inline iterator(csv &parent) : _parent(parent.good() ? &parent : nullptr) {
        ++(*this);
    }

    /// Read one row, if possible. Set to end if parent is not good anymore.
    inline iterator &operator++() {
        if (_parent != nullptr) {
            _row = _parent->read_row();
            if (!_parent->good()) {
                _parent = nullptr;
            }
        }
        return *this;
    }

    inline iterator operator++(int) {
        iterator copy = *this;
        ++(*this);
        return copy;
    }

    inline csv::value_type const &operator*() const {
        return _row;
    }

    inline csv::value_type const *operator->() const {
        return &_row;
    }

    bool operator==(iterator const &other) {
        return (this == &other) or (_parent == nullptr and other._parent == nullptr);
    }
    bool operator!=(iterator const &other) {
        return not (*this == other);
    }
};

template <class... fields>
typename csv<fields...>::iterator csv<fields...>::begin() {
    return iterator(*this);
}

template <class... fields>
typename csv<fields...>::iterator csv<fields...>::end() {
    return iterator();
}

I put a tiny working example on GitHub; I've been using it for parsing some numerical data and it served its purpose.

You can join your array using the following:

string.Join(",", Client);

Then you can output anyway you want. You can change the comma to what ever you want, a space, a pipe, or whatever.

I don't Know you use any Bootstrap version but the useful helper class for centering and block an element in center it is .center-block because this class contain margin and display CSS properties but the .text-center class only contain the text-align property

Bootstrap Helper Class center-block

//filename is filepath string
BufferedReader br = new BufferedReader(new FileReader(new File(filename)));
String line;
StringBuilder sb = new StringBuilder();

while((line=br.readLine())!= null){
    sb.append(line.trim());
}

using StringBuilder is more efficient then concat http://kaioa.com/node/59

List of locales supported as of API 22 (Android 5.1). Obtained from a Nexus 5 with locale set to "English (United States)" (locale affects the DisplayName output).

for (Locale locale : Locale.getAvailableLocales()) {
    Log.d("LOCALES", locale.getLanguage() + "_" + locale.getCountry() + " [" + locale.getDisplayName() + "]");
}


    af_ [Afrikaans]
    af_NA [Afrikaans (Namibia)]
    af_ZA [Afrikaans (South Africa)]
    agq_ [Aghem]
    agq_CM [Aghem (Cameroon)]
    ak_ [Akan]
    ak_GH [Akan (Ghana)]
    am_ [Amharic]
    am_ET [Amharic (Ethiopia)]
    ar_ [Arabic]
    ar_001 [Arabic (World)]
    ar_AE [Arabic (United Arab Emirates)]
    ar_BH [Arabic (Bahrain)]
    ar_DJ [Arabic (Djibouti)]
    ar_DZ [Arabic (Algeria)]
    ar_EG [Arabic (Egypt)]
    ar_EH [Arabic (Western Sahara)]
    ar_ER [Arabic (Eritrea)]
    ar_IL [Arabic (Israel)]
    ar_IQ [Arabic (Iraq)]
    ar_JO [Arabic (Jordan)]
    ar_KM [Arabic (Comoros)]
    ar_KW [Arabic (Kuwait)]
    ar_LB [Arabic (Lebanon)]
    ar_LY [Arabic (Libya)]
    ar_MA [Arabic (Morocco)]
    ar_MR [Arabic (Mauritania)]
    ar_OM [Arabic (Oman)]
    ar_PS [Arabic (Palestine)]
    ar_QA [Arabic (Qatar)]
    ar_SA [Arabic (Saudi Arabia)]
    ar_SD [Arabic (Sudan)]
    ar_SO [Arabic (Somalia)]
    ar_SS [Arabic (South Sudan)]
    ar_SY [Arabic (Syria)]
    ar_TD [Arabic (Chad)]
    ar_TN [Arabic (Tunisia)]
    ar_YE [Arabic (Yemen)]
    as_ [Assamese]
    as_IN [Assamese (India)]
    asa_ [Asu]
    asa_TZ [Asu (Tanzania)]
    az_ [Azerbaijani]
    az_ [Azerbaijani (Cyrillic)]
    az_AZ [Azerbaijani (Cyrillic,Azerbaijan)]
    az_ [Azerbaijani (Latin)]
    az_AZ [Azerbaijani (Latin,Azerbaijan)]
    bas_ [Basaa]
    bas_CM [Basaa (Cameroon)]
    be_ [Belarusian]
    be_BY [Belarusian (Belarus)]
    bem_ [Bemba]
    bem_ZM [Bemba (Zambia)]
    bez_ [Bena]
    bez_TZ [Bena (Tanzania)]
    bg_ [Bulgarian]
    bg_BG [Bulgarian (Bulgaria)]
    bm_ [Bambara]
    bm_ML [Bambara (Mali)]
    bn_ [Bengali]
    bn_BD [Bengali (Bangladesh)]
    bn_IN [Bengali (India)]
    bo_ [Tibetan]
    bo_CN [Tibetan (China)]
    bo_IN [Tibetan (India)]
    br_ [Breton]
    br_FR [Breton (France)]
    brx_ [Bodo]
    brx_IN [Bodo (India)]
    bs_ [Bosnian]
    bs_ [Bosnian (Cyrillic)]
    bs_BA [Bosnian (Cyrillic,Bosnia and Herzegovina)]
    bs_ [Bosnian (Latin)]
    bs_BA [Bosnian (Latin,Bosnia and Herzegovina)]
    ca_ [Catalan]
    ca_AD [Catalan (Andorra)]
    ca_ES [Catalan (Spain)]
    ca_FR [Catalan (France)]
    ca_IT [Catalan (Italy)]
    cgg_ [Chiga]
    cgg_UG [Chiga (Uganda)]
    chr_ [Cherokee]
    chr_US [Cherokee (United States)]
    cs_ [Czech]
    cs_CZ [Czech (Czech Republic)]
    cy_ [Welsh]
    cy_GB [Welsh (United Kingdom)]
    da_ [Danish]
    da_DK [Danish (Denmark)]
    da_GL [Danish (Greenland)]
    dav_ [Taita]
    dav_KE [Taita (Kenya)]
    de_ [German]
    de_AT [German (Austria)]
    de_BE [German (Belgium)]
    de_CH [German (Switzerland)]
    de_DE [German (Germany)]
    de_LI [German (Liechtenstein)]
    de_LU [German (Luxembourg)]
    dje_ [Zarma]
    dje_NE [Zarma (Niger)]
    dua_ [Duala]
    dua_CM [Duala (Cameroon)]
    dyo_ [Jola-Fonyi]
    dyo_SN [Jola-Fonyi (Senegal)]
    dz_ [Dzongkha]
    dz_BT [Dzongkha (Bhutan)]
    ebu_ [Embu]
    ebu_KE [Embu (Kenya)]
    ee_ [Ewe]
    ee_GH [Ewe (Ghana)]
    ee_TG [Ewe (Togo)]
    el_ [Greek]
    el_CY [Greek (Cyprus)]
    el_GR [Greek (Greece)]
    en_ [English]
    en_001 [English (World)]
    en_150 [English (Europe)]
    en_AG [English (Antigua and Barbuda)]
    en_AI [English (Anguilla)]
    en_AS [English (American Samoa)]
    en_AU [English (Australia)]
    en_BB [English (Barbados)]
    en_BE [English (Belgium)]
    en_BM [English (Bermuda)]
    en_BS [English (Bahamas)]
    en_BW [English (Botswana)]
    en_BZ [English (Belize)]
    en_CA [English (Canada)]
    en_CC [English (Cocos (Keeling) Islands)]
    en_CK [English (Cook Islands)]
    en_CM [English (Cameroon)]
    en_CX [English (Christmas Island)]
    en_DG [English (Diego Garcia)]
    en_DM [English (Dominica)]
    en_ER [English (Eritrea)]
    en_FJ [English (Fiji)]
    en_FK [English (Falkland Islands (Islas Malvinas))]
    en_FM [English (Micronesia)]
    en_GB [English (United Kingdom)]
    en_GD [English (Grenada)]
    en_GG [English (Guernsey)]
    en_GH [English (Ghana)]
    en_GI [English (Gibraltar)]
    en_GM [English (Gambia)]
    en_GU [English (Guam)]
    en_GY [English (Guyana)]
    en_HK [English (Hong Kong)]
    en_IE [English (Ireland)]
    en_IM [English (Isle of Man)]
    en_IN [English (India)]
    en_IO [English (British Indian Ocean Territory)]
    en_JE [English (Jersey)]
    en_JM [English (Jamaica)]
    en_KE [English (Kenya)]
    en_KI [English (Kiribati)]
    en_KN [English (Saint Kitts and Nevis)]
    en_KY [English (Cayman Islands)]
    en_LC [English (Saint Lucia)]
    en_LR [English (Liberia)]
    en_LS [English (Lesotho)]
    en_MG [English (Madagascar)]
    en_MH [English (Marshall Islands)]
    en_MO [English (Macau)]
    en_MP [English (Northern Mariana Islands)]
    en_MS [English (Montserrat)]
    en_MT [English (Malta)]
    en_MU [English (Mauritius)]
    en_MW [English (Malawi)]
    en_NA [English (Namibia)]
    en_NF [English (Norfolk Island)]
    en_NG [English (Nigeria)]
    en_NR [English (Nauru)]
    en_NU [English (Niue)]
    en_NZ [English (New Zealand)]
    en_PG [English (Papua New Guinea)]
    en_PH [English (Philippines)]
    en_PK [English (Pakistan)]
    en_PN [English (Pitcairn Islands)]
    en_PR [English (Puerto Rico)]
    en_PW [English (Palau)]
    en_RW [English (Rwanda)]
    en_SB [English (Solomon Islands)]
    en_SC [English (Seychelles)]
    en_SD [English (Sudan)]
    en_SG [English (Singapore)]
    en_SH [English (Saint Helena)]
    en_SL [English (Sierra Leone)]
    en_SS [English (South Sudan)]
    en_SX [English (Sint Maarten)]
    en_SZ [English (Swaziland)]
    en_TC [English (Turks and Caicos Islands)]
    en_TK [English (Tokelau)]
    en_TO [English (Tonga)]
    en_TT [English (Trinidad and Tobago)]
    en_TV [English (Tuvalu)]
    en_TZ [English (Tanzania)]
    en_UG [English (Uganda)]
    en_UM [English (U.S. Outlying Islands)]
    en_US [English (United States)]
    en_US [English (United States,Computer)]
    en_VC [English (St. Vincent & Grenadines)]
    en_VG [English (British Virgin Islands)]
    en_VI [English (U.S. Virgin Islands)]
    en_VU [English (Vanuatu)]
    en_WS [English (Samoa)]
    en_ZA [English (South Africa)]
    en_ZM [English (Zambia)]
    en_ZW [English (Zimbabwe)]
    eo_ [Esperanto]
    es_ [Spanish]
    es_419 [Spanish (Latin America)]
    es_AR [Spanish (Argentina)]
    es_BO [Spanish (Bolivia)]
    es_CL [Spanish (Chile)]
    es_CO [Spanish (Colombia)]
    es_CR [Spanish (Costa Rica)]
    es_CU [Spanish (Cuba)]
    es_DO [Spanish (Dominican Republic)]
    es_EA [Spanish (Ceuta and Melilla)]
    es_EC [Spanish (Ecuador)]
    es_ES [Spanish (Spain)]
    es_GQ [Spanish (Equatorial Guinea)]
    es_GT [Spanish (Guatemala)]
    es_HN [Spanish (Honduras)]
    es_IC [Spanish (Canary Islands)]
    es_MX [Spanish (Mexico)]
    es_NI [Spanish (Nicaragua)]
    es_PA [Spanish (Panama)]
    es_PE [Spanish (Peru)]
    es_PH [Spanish (Philippines)]
    es_PR [Spanish (Puerto Rico)]
    es_PY [Spanish (Paraguay)]
    es_SV [Spanish (El Salvador)]
    es_US [Spanish (United States)]
    es_UY [Spanish (Uruguay)]
    es_VE [Spanish (Venezuela)]
    et_ [Estonian]
    et_EE [Estonian (Estonia)]
    eu_ [Basque]
    eu_ES [Basque (Spain)]
    ewo_ [Ewondo]
    ewo_CM [Ewondo (Cameroon)]
    fa_ [Persian]
    fa_AF [Persian (Afghanistan)]
    fa_IR [Persian (Iran)]
    ff_ [Fulah]
    ff_SN [Fulah (Senegal)]
    fi_ [Finnish]
    fi_FI [Finnish (Finland)]
    fil_ [Filipino]
    fil_PH [Filipino (Philippines)]
    fo_ [Faroese]
    fo_FO [Faroese (Faroe Islands)]
    fr_ [French]
    fr_BE [French (Belgium)]
    fr_BF [French (Burkina Faso)]
    fr_BI [French (Burundi)]
    fr_BJ [French (Benin)]
    fr_BL [French (Saint Barthélemy)]
    fr_CA [French (Canada)]
    fr_CD [French (Congo (DRC))]
    fr_CF [French (Central African Republic)]
    fr_CG [French (Congo (Republic))]
    fr_CH [French (Switzerland)]
    fr_CI [French (Côte d’Ivoire)]
    fr_CM [French (Cameroon)]
    fr_DJ [French (Djibouti)]
    fr_DZ [French (Algeria)]
    fr_FR [French (France)]
    fr_GA [French (Gabon)]
    fr_GF [French (French Guiana)]
    fr_GN [French (Guinea)]
    fr_GP [French (Guadeloupe)]
    fr_GQ [French (Equatorial Guinea)]
    fr_HT [French (Haiti)]
    fr_KM [French (Comoros)]
    fr_LU [French (Luxembourg)]
    fr_MA [French (Morocco)]
    fr_MC [French (Monaco)]
    fr_MF [French (Saint Martin)]
    fr_MG [French (Madagascar)]
    fr_ML [French (Mali)]
    fr_MQ [French (Martinique)]
    fr_MR [French (Mauritania)]
    fr_MU [French (Mauritius)]
    fr_NC [French (New Caledonia)]
    fr_NE [French (Niger)]
    fr_PF [French (French Polynesia)]
    fr_PM [French (Saint Pierre and Miquelon)]
    fr_RE [French (Réunion)]
    fr_RW [French (Rwanda)]
    fr_SC [French (Seychelles)]
    fr_SN [French (Senegal)]
    fr_SY [French (Syria)]
    fr_TD [French (Chad)]
    fr_TG [French (Togo)]
    fr_TN [French (Tunisia)]
    fr_VU [French (Vanuatu)]
    fr_WF [French (Wallis and Futuna)]
    fr_YT [French (Mayotte)]
    ga_ [Irish]
    ga_IE [Irish (Ireland)]
    gl_ [Galician]
    gl_ES [Galician (Spain)]
    gsw_ [Swiss German]
    gsw_CH [Swiss German (Switzerland)]
    gsw_LI [Swiss German (Liechtenstein)]
    gu_ [Gujarati]
    gu_IN [Gujarati (India)]
    guz_ [Gusii]
    guz_KE [Gusii (Kenya)]
    gv_ [Manx]
    gv_IM [Manx (Isle of Man)]
    ha_ [Hausa]
    ha_ [Hausa (Latin)]
    ha_GH [Hausa (Latin,Ghana)]
    ha_NE [Hausa (Latin,Niger)]
    ha_NG [Hausa (Latin,Nigeria)]
    haw_ [Hawaiian]
    haw_US [Hawaiian (United States)]
    iw_ [Hebrew]
    iw_IL [Hebrew (Israel)]
    hi_ [Hindi]
    hi_IN [Hindi (India)]
    hr_ [Croatian]
    hr_BA [Croatian (Bosnia and Herzegovina)]
    hr_HR [Croatian (Croatia)]
    hu_ [Hungarian]
    hu_HU [Hungarian (Hungary)]
    hy_ [Armenian]
    hy_AM [Armenian (Armenia)]
    in_ [Indonesian]
    in_ID [Indonesian (Indonesia)]
    ig_ [Igbo]
    ig_NG [Igbo (Nigeria)]
    ii_ [Sichuan Yi]
    ii_CN [Sichuan Yi (China)]
    is_ [Icelandic]
    is_IS [Icelandic (Iceland)]
    it_ [Italian]
    it_CH [Italian (Switzerland)]
    it_IT [Italian (Italy)]
    it_SM [Italian (San Marino)]
    ja_ [Japanese]
    ja_JP [Japanese (Japan)]
    jgo_ [Ngomba]
    jgo_CM [Ngomba (Cameroon)]
    jmc_ [Machame]
    jmc_TZ [Machame (Tanzania)]
    ka_ [Georgian]
    ka_GE [Georgian (Georgia)]
    kab_ [Kabyle]
    kab_DZ [Kabyle (Algeria)]
    kam_ [Kamba]
    kam_KE [Kamba (Kenya)]
    kde_ [Makonde]
    kde_TZ [Makonde (Tanzania)]
    kea_ [Kabuverdianu]
    kea_CV [Kabuverdianu (Cape Verde)]
    khq_ [Koyra Chiini]
    khq_ML [Koyra Chiini (Mali)]
    ki_ [Kikuyu]
    ki_KE [Kikuyu (Kenya)]
    kk_ [Kazakh]
    kk_ [Kazakh (Cyrillic)]
    kk_KZ [Kazakh (Cyrillic,Kazakhstan)]
    kkj_ [Kako]
    kkj_CM [Kako (Cameroon)]
    kl_ [Kalaallisut]
    kl_GL [Kalaallisut (Greenland)]
    kln_ [Kalenjin]
    kln_KE [Kalenjin (Kenya)]
    km_ [Khmer]
    km_KH [Khmer (Cambodia)]
    kn_ [Kannada]
    kn_IN [Kannada (India)]
    ko_ [Korean]
    ko_KP [Korean (North Korea)]
    ko_KR [Korean (South Korea)]
    kok_ [Konkani]
    kok_IN [Konkani (India)]
    ks_ [Kashmiri]
    ks_ [Kashmiri (Arabic)]
    ks_IN [Kashmiri (Arabic,India)]
    ksb_ [Shambala]
    ksb_TZ [Shambala (Tanzania)]
    ksf_ [Bafia]
    ksf_CM [Bafia (Cameroon)]
    kw_ [Cornish]
    kw_GB [Cornish (United Kingdom)]
    ky_ [Kyrgyz]
    ky_ [Kyrgyz (Cyrillic)]
    ky_KG [Kyrgyz (Cyrillic,Kyrgyzstan)]
    lag_ [Langi]
    lag_TZ [Langi (Tanzania)]
    lg_ [Ganda]
    lg_UG [Ganda (Uganda)]
    lkt_ [Lakota]
    lkt_US [Lakota (United States)]
    ln_ [Lingala]
    ln_AO [Lingala (Angola)]
    ln_CD [Lingala (Congo (DRC))]
    ln_CF [Lingala (Central African Republic)]
    ln_CG [Lingala (Congo (Republic))]
    lo_ [Lao]
    lo_LA [Lao (Laos)]
    lt_ [Lithuanian]
    lt_LT [Lithuanian (Lithuania)]
    lu_ [Luba-Katanga]
    lu_CD [Luba-Katanga (Congo (DRC))]
    luo_ [Luo]
    luo_KE [Luo (Kenya)]
    luy_ [Luyia]
    luy_KE [Luyia (Kenya)]
    lv_ [Latvian]
    lv_LV [Latvian (Latvia)]
    mas_ [Masai]
    mas_KE [Masai (Kenya)]
    mas_TZ [Masai (Tanzania)]
    mer_ [Meru]
    mer_KE [Meru (Kenya)]
    mfe_ [Morisyen]
    mfe_MU [Morisyen (Mauritius)]
    mg_ [Malagasy]
    mg_MG [Malagasy (Madagascar)]
    mgh_ [Makhuwa-Meetto]
    mgh_MZ [Makhuwa-Meetto (Mozambique)]
    mgo_ [Meta']
    mgo_CM [Meta' (Cameroon)]
    mk_ [Macedonian]
    mk_MK [Macedonian (Macedonia (FYROM))]
    ml_ [Malayalam]
    ml_IN [Malayalam (India)]
    mn_ [Mongolian]
    mn_ [Mongolian (Cyrillic)]
    mn_MN [Mongolian (Cyrillic,Mongolia)]
    mr_ [Marathi]
    mr_IN [Marathi (India)]
    ms_ [Malay]
    ms_ [Malay (Latin)]
    ms_BN [Malay (Latin,Brunei)]
    ms_MY [Malay (Latin,Malaysia)]
    ms_SG [Malay (Latin,Singapore)]
    mt_ [Maltese]
    mt_MT [Maltese (Malta)]
    mua_ [Mundang]
    mua_CM [Mundang (Cameroon)]
    my_ [Burmese]
    my_MM [Burmese (Myanmar (Burma))]
    naq_ [Nama]
    naq_NA [Nama (Namibia)]
    nb_ [Norwegian Bokmål]
    nb_NO [Norwegian Bokmål (Norway)]
    nb_SJ [Norwegian Bokmål (Svalbard and Jan Mayen)]
    nd_ [North Ndebele]
    nd_ZW [North Ndebele (Zimbabwe)]
    ne_ [Nepali]
    ne_IN [Nepali (India)]
    ne_NP [Nepali (Nepal)]
    nl_ [Dutch]
    nl_AW [Dutch (Aruba)]
    nl_BE [Dutch (Belgium)]
    nl_BQ [Dutch (Caribbean Netherlands)]
    nl_CW [Dutch (Curaçao)]
    nl_NL [Dutch (Netherlands)]
    nl_SR [Dutch (Suriname)]
    nl_SX [Dutch (Sint Maarten)]
    nmg_ [Kwasio]
    nmg_CM [Kwasio (Cameroon)]
    nn_ [Norwegian Nynorsk]
    nn_NO [Norwegian Nynorsk (Norway)]
    nnh_ [Ngiemboon]
    nnh_CM [Ngiemboon (Cameroon)]
    nus_ [Nuer]
    nus_SD [Nuer (Sudan)]
    nyn_ [Nyankole]
    nyn_UG [Nyankole (Uganda)]
    om_ [Oromo]
    om_ET [Oromo (Ethiopia)]
    om_KE [Oromo (Kenya)]
    or_ [Oriya]
    or_IN [Oriya (India)]
    pa_ [Punjabi]
    pa_ [Punjabi (Arabic)]
    pa_PK [Punjabi (Arabic,Pakistan)]
    pa_ [Punjabi (Gurmukhi)]
    pa_IN [Punjabi (Gurmukhi,India)]
    pl_ [Polish]
    pl_PL [Polish (Poland)]
    ps_ [Pashto]
    ps_AF [Pashto (Afghanistan)]
    pt_ [Portuguese]
    pt_AO [Portuguese (Angola)]
    pt_BR [Portuguese (Brazil)]
    pt_CV [Portuguese (Cape Verde)]
    pt_GW [Portuguese (Guinea-Bissau)]
    pt_MO [Portuguese (Macau)]
    pt_MZ [Portuguese (Mozambique)]
    pt_PT [Portuguese (Portugal)]
    pt_ST [Portuguese (São Tomé and Príncipe)]
    pt_TL [Portuguese (Timor-Leste)]
    rm_ [Romansh]
    rm_CH [Romansh (Switzerland)]
    rn_ [Rundi]
    rn_BI [Rundi (Burundi)]
    ro_ [Romanian]
    ro_MD [Romanian (Moldova)]
    ro_RO [Romanian (Romania)]
    rof_ [Rombo]
    rof_TZ [Rombo (Tanzania)]
    ru_ [Russian]
    ru_BY [Russian (Belarus)]
    ru_KG [Russian (Kyrgyzstan)]
    ru_KZ [Russian (Kazakhstan)]
    ru_MD [Russian (Moldova)]
    ru_RU [Russian (Russia)]
    ru_UA [Russian (Ukraine)]
    rw_ [Kinyarwanda]
    rw_RW [Kinyarwanda (Rwanda)]
    rwk_ [Rwa]
    rwk_TZ [Rwa (Tanzania)]
    saq_ [Samburu]
    saq_KE [Samburu (Kenya)]
    sbp_ [Sangu]
    sbp_TZ [Sangu (Tanzania)]
    seh_ [Sena]
    seh_MZ [Sena (Mozambique)]
    ses_ [Koyraboro Senni]
    ses_ML [Koyraboro Senni (Mali)]
    sg_ [Sango]
    sg_CF [Sango (Central African Republic)]
    shi_ [Tachelhit]
    shi_ [Tachelhit (Latin)]
    shi_MA [Tachelhit (Latin,Morocco)]
    shi_ [Tachelhit (Tifinagh)]
    shi_MA [Tachelhit (Tifinagh,Morocco)]
    si_ [Sinhala]
    si_LK [Sinhala (Sri Lanka)]
    sk_ [Slovak]
    sk_SK [Slovak (Slovakia)]
    sl_ [Slovenian]
    sl_SI [Slovenian (Slovenia)]
    sn_ [Shona]
    sn_ZW [Shona (Zimbabwe)]
    so_ [Somali]
    so_DJ [Somali (Djibouti)]
    so_ET [Somali (Ethiopia)]
    so_KE [Somali (Kenya)]
    so_SO [Somali (Somalia)]
    sq_ [Albanian]
    sq_AL [Albanian (Albania)]
    sq_MK [Albanian (Macedonia (FYROM))]
    sq_XK [Albanian (Kosovo)]
    sr_ [Serbian]
    sr_ [Serbian (Cyrillic)]
    sr_BA [Serbian (Cyrillic,Bosnia and Herzegovina)]
    sr_ME [Serbian (Cyrillic,Montenegro)]
    sr_RS [Serbian (Cyrillic,Serbia)]
    sr_XK [Serbian (Cyrillic,Kosovo)]
    sr_ [Serbian (Latin)]
    sr_BA [Serbian (Latin,Bosnia and Herzegovina)]
    sr_ME [Serbian (Latin,Montenegro)]
    sr_RS [Serbian (Latin,Serbia)]
    sr_XK [Serbian (Latin,Kosovo)]
    sv_ [Swedish]
    sv_AX [Swedish (Åland Islands)]
    sv_FI [Swedish (Finland)]
    sv_SE [Swedish (Sweden)]
    sw_ [Swahili]
    sw_KE [Swahili (Kenya)]
    sw_TZ [Swahili (Tanzania)]
    sw_UG [Swahili (Uganda)]
    swc_ [Congo Swahili]
    swc_CD [Congo Swahili (Congo (DRC))]
    ta_ [Tamil]
    ta_IN [Tamil (India)]
    ta_LK [Tamil (Sri Lanka)]
    ta_MY [Tamil (Malaysia)]
    ta_SG [Tamil (Singapore)]
    te_ [Telugu]
    te_IN [Telugu (India)]
    teo_ [Teso]
    teo_KE [Teso (Kenya)]
    teo_UG [Teso (Uganda)]
    th_ [Thai]
    th_TH [Thai (Thailand)]
    ti_ [Tigrinya]
    ti_ER [Tigrinya (Eritrea)]
    ti_ET [Tigrinya (Ethiopia)]
    to_ [Tongan]
    to_TO [Tongan (Tonga)]
    tr_ [Turkish]
    tr_CY [Turkish (Cyprus)]
    tr_TR [Turkish (Turkey)]
    twq_ [Tasawaq]
    twq_NE [Tasawaq (Niger)]
    tzm_ [Central Atlas Tamazight]
    tzm_ [Central Atlas Tamazight (Latin)]
    tzm_MA [Central Atlas Tamazight (Latin,Morocco)]
    ug_ [Uyghur]
    ug_ [Uyghur (Arabic)]
    ug_CN [Uyghur (Arabic,China)]
    uk_ [Ukrainian]
    uk_UA [Ukrainian (Ukraine)]
    ur_ [Urdu]
    ur_IN [Urdu (India)]
    ur_PK [Urdu (Pakistan)]
    uz_ [Uzbek]
    uz_ [Uzbek (Arabic)]
    uz_AF [Uzbek (Arabic,Afghanistan)]
    uz_ [Uzbek (Cyrillic)]
    uz_UZ [Uzbek (Cyrillic,Uzbekistan)]
    uz_ [Uzbek (Latin)]
    uz_UZ [Uzbek (Latin,Uzbekistan)]
    vai_ [Vai]
    vai_ [Vai (Latin)]
    vai_LR [Vai (Latin,Liberia)]
    vai_ [Vai (Vai)]
    vai_LR [Vai (Vai,Liberia)]
    vi_ [Vietnamese]
    vi_VN [Vietnamese (Vietnam)]
    vun_ [Vunjo]
    vun_TZ [Vunjo (Tanzania)]
    xog_ [Soga]
    xog_UG [Soga (Uganda)]
    yav_ [Yangben]
    yav_CM [Yangben (Cameroon)]
    yo_ [Yoruba]
    yo_BJ [Yoruba (Benin)]
    yo_NG [Yoruba (Nigeria)]
    zgh_ [Standard Moroccan Tamazight]
    zgh_MA [Standard Moroccan Tamazight (Morocco)]
    zh_ [Chinese]
    zh_ [Chinese (Simplified Han)]
    zh_CN [Chinese (Simplified Han,China)]
    zh_HK [Chinese (Simplified Han,Hong Kong)]
    zh_MO [Chinese (Simplified Han,Macau)]
    zh_SG [Chinese (Simplified Han,Singapore)]
    zh_ [Chinese (Traditional Han)]
    zh_HK [Chinese (Traditional Han,Hong Kong)]
    zh_MO [Chinese (Traditional Han,Macau)]
    zh_TW [Chinese (Traditional Han,Taiwan)]
    zu_ [Zulu]
    zu_ZA [Zulu (South Africa)]

The 'Enter some junk value' answer didn't do the trick for me, my site was continuing to load despite the entered junk.

Instead I added the following line to the top of the .htaccess file:

deny from all

This will quickly let you know if .htaccess is being picked up or not. If the .htaccess is being used, the files in that folder won't load at all.

Use calc!

https://jsbin.com/wehixalome/edit?html,css,output

HTML:

<div class="left">
  100 px wide!
  </div><!-- Notice there isn't a space between the divs! *see edit for alternative* --><div class="right">
    Fills width!
  </div>

CSS:

.left {
  display: inline-block;
  width: 100px;

  background: red;
  color: white;
}
.right {
  display: inline-block;
  width: calc(100% - 100px);

  background: blue;
  color: white;
}

Update: As an alternative to not having a space between the divs you can set font-size: 0 on the outer element.

Try this its just a trick

<input type="file" name="uploadfile" id="img" style="display:none;"/>
<label for="img">Click me to upload image</label>

How it works

It's very simple. the Label element uses the "for" tag to reference to a form's element by id. In this case, we used "img" as the reference key between them. Once it is done, whenever you click on the label, it automatically trigger the form's element click event which is the file element click event in our case. We then make the file element invisible by using display:none and not visibility:hidden so that it doesn't create empty space.

Enjoy coding

# Method 1
f = open("Path/To/Your/File.txt", "w")   # 'r' for reading and 'w' for writing
f.write("Hello World from " + f.name)    # Write inside file 
f.close()                                # Close file 

# Method 2
with open("Path/To/Your/File.txt", "w") as f:   # Opens file and casts as f 
    f.write("Hello World form " + f.name)       # Writing
    # File closed automatically

There are many more methods but these two are most common. Hope this helped!

You can also try installing it in Visual Studio via Package Manager.

Run Install-Package Microsoft.Office.Interop.Excel in the Package Console. This will automatically add it as a project reference.

Use is like this:

Using Excel=Microsoft.Office.Interop.Excel;

Now you can use new html5 input validation attribute pattern=".+\.(xlsx|xls|csv)".

I though I'd add one more way. In my case I supply this to com.hazelcast.config.XmlConfigBuilder which only needs java.util.Properties to resolve some properties inside the Hazelcast XML configuration file, i.e. it only calls getProperty(String) method. So, this allowed me to do what I needed:

@RequiredArgsConstructor
public class SpringReadOnlyProperties extends Properties {

  private final org.springframework.core.env.Environment delegate;

  @Override
  public String getProperty(String key) {
    return delegate.getProperty(key);
  }

  @Override
  public String getProperty(String key, String defaultValue) {
    return delegate.getProperty(key, defaultValue);
  }

  @Override
  public synchronized String toString() {
    return getClass().getName() + "{" + delegate + "}";
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;
    if (!super.equals(o)) return false;
    SpringReadOnlyProperties that = (SpringReadOnlyProperties) o;
    return delegate.equals(that.delegate);
  }

  @Override
  public int hashCode() {
    return Objects.hash(super.hashCode(), delegate);
  }

  private void throwException() {
    throw new RuntimeException("This method is not supported");
  }

  //all methods below throw the exception

  * override all methods *
}

P.S. I ended up not using this specifically for Hazelcast because it only resolves properties for XML file but not at runtime. Since I also use Spring, I decided to go with a custom org.springframework.cache.interceptor.AbstractCacheResolver#getCacheNames. This resolves properties for both situations, at least if you use properties in cache names.

You need a regular expression for this. Look here. If you are using .net Framework4.5 then you can also use this. As it is built in .net Framework 4.5. Example

[EmailAddress(ErrorMessage = "Invalid Email Address")]
public string Email { get; set; }

>>> def roundup(number):
...     return round(number+.5)
>>> roundup(2.3)
3
>>> roundup(19.00000000001)
20

This function requires no modules.

For years I used Hungarian notation in my programming. Other than some visual clutter and the task of changing the prefix when I changed the data type, no one could convince me otherwise. Until recently--when I had to combine existing C# and VB.NET assemblies in the same solution.

The result: I had to pass a "fltSomeVariable" to a "sngSomeVariable" method parameter. Even as someone who programs in both C# and VB.NET, it caught me off guard and made me pause for a moment. (C# and VB.NET sometimes use different names to represent the same data type--float and single, for example.)

Now consider this: what if you create a COM component that's callable from many languages? The VB.NET and C# "conversion" was easy for a .NET programmer. But what about someone that develops in C++ or Java? Does "dwSomeVariable" mean anything to a .NET developer not familiar with C++?

Python 3 ints do not have a maximum.

If your purpose is to determine the maximum size of an int in C when compiled the same way Python was, you can use the struct module to find out:

>>> import struct
>>> platform_c_maxint = 2 ** (struct.Struct('i').size * 8 - 1) - 1

If you are curious about the internal implementation details of Python 3 int objects, Look at sys.int_info for bits per digit and digit size details. No normal program should care about these.

Plain form, without regex:

$prefix = 'bla_';
$str = 'bla_string_bla_bla_bla';

if (substr($str, 0, strlen($prefix)) == $prefix) {
    $str = substr($str, strlen($prefix));
} 

Takes: 0.0369 ms (0.000,036,954 seconds)

And with:

$prefix = 'bla_';
$str = 'bla_string_bla_bla_bla';
$str = preg_replace('/^' . preg_quote($prefix, '/') . '/', '', $str);

Takes: 0.1749 ms (0.000,174,999 seconds) the 1st run (compiling), and 0.0510 ms (0.000,051,021 seconds) after.

Profiled on my server, obviously.

The problem is where you are executing:

rankings[kvp.Key] = rankings[kvp.Key] + 4;

You cannot modify the collection you are iterating through in a foreach loop. A foreach loop requires the loop to be immutable during iteration.

Instead, use a standard 'for' loop or create a new loop that is a copy and iterate through that while updating your original.

right click on the "SRC folder", select "Mark directory as:, select "Resource Root".

Then Edit the run configuration. select Run, run, edit configuration, with the plus button add an application configuration, give it a name (could be any name), and in the main class write down the full name of the main java class for example, com.example.java.MaxValues.

you might also need to check file, project structure, project settings-project, give it a folder for the compiler output, preferably a separate folder, under the java folder,

You don't need the " to define a regular expression so just:

var regex = /(?!(?:[^<]+>|[^>]+<\/a>))\b(value)\b/is; // this is valid syntax

If value is a variable and you want a dynamic regular expression then you can't use this notation; use the alternative notation.

String.replace also accepts strings as input, so you can do "fox".replace("fox", "bear");

Alternative:

var regex = new RegExp("/(?!(?:[^<]+>|[^>]+<\/a>))\b(value)\b/", "is");
var regex = new RegExp("/(?!(?:[^<]+>|[^>]+<\/a>))\b(" + value + ")\b/", "is");
var regex = new RegExp("/(?!(?:[^<]+>|[^>]+<\/a>))\b(.*?)\b/", "is");

Keep in mind that if value contains regular expressions characters like (, [ and ? you will need to escape them.

read help GOTO

and try

:again
do it
goto again

Assume a network environment where a "user" (aka you) has to logon. Usually this is a User ID (UID) and a Password (PW). OK then, what is your Identity, or who are you? You are the UID, and this gleans that "name" from your logon session. Simple! It should also work in an internet application that needs you to login, like Best Buy and others.

This will pull my UID, or "Name", from my session when I open the default page of the web application I need to use. Now, in my instance, I am part of a Domain, so I can use initial Windows authentication, and it needs to verify who I am, thus the 2nd part of the code. As for Forms Authentication, it would rely on the ticket (aka cookie most likely) sent to your workstation/computer. And the code would look like:

string id = HttpContext.Current.User.Identity.Name;

// Strip the domain off of the result
id = id.Substring(id.LastIndexOf(@"\", StringComparison.InvariantCulture) + 1);

Now it has my business name (aka UID) and can display it on the screen.

I use a hidden textbox to edit all the listview items/subitems. The only problem is that the textbox needs to disappear as soon as any event takes place outside the textbox and the listview doesn't trigger the scroll event so if you scroll the listview the textbox will still be visible. To bypass this problem I created the Scroll event with this overrided listview.

Here is my code, I constantly reuse it so it might be help for someone:

ListViewItem.ListViewSubItem SelectedLSI;
private void listView2_MouseUp(object sender, MouseEventArgs e)
{
    ListViewHitTestInfo i = listView2.HitTest(e.X, e.Y);
    SelectedLSI = i.SubItem;
    if (SelectedLSI == null)
        return;

    int border = 0;
    switch (listView2.BorderStyle)
    {
        case BorderStyle.FixedSingle:
            border = 1;
            break;
        case BorderStyle.Fixed3D:
            border = 2;
            break;
    }

    int CellWidth = SelectedLSI.Bounds.Width;
    int CellHeight = SelectedLSI.Bounds.Height;
    int CellLeft = border + listView2.Left + i.SubItem.Bounds.Left;
    int CellTop =listView2.Top + i.SubItem.Bounds.Top;
    // First Column
    if (i.SubItem == i.Item.SubItems[0])
        CellWidth = listView2.Columns[0].Width;

    TxtEdit.Location = new Point(CellLeft, CellTop);
    TxtEdit.Size = new Size(CellWidth, CellHeight);
    TxtEdit.Visible = true;
    TxtEdit.BringToFront();
    TxtEdit.Text = i.SubItem.Text;
    TxtEdit.Select();
    TxtEdit.SelectAll();
}
private void listView2_MouseDown(object sender, MouseEventArgs e)
{
    HideTextEditor();
}
private void listView2_Scroll(object sender, EventArgs e)
{
    HideTextEditor();
}
private void TxtEdit_Leave(object sender, EventArgs e)
{
    HideTextEditor();
}
private void TxtEdit_KeyUp(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Enter || e.KeyCode == Keys.Return)
        HideTextEditor();
}
private void HideTextEditor()
{
    TxtEdit.Visible = false;
    if (SelectedLSI != null)
        SelectedLSI.Text = TxtEdit.Text;
    SelectedLSI = null;
    TxtEdit.Text = "";
}

I faced this issue few days back and this is the approach I followed and it works for me.

For me this was happening when i was trying to fetch data using axios or fetch libraries as i am under a corporate firewall, so we had certain particular certificates which node js certificate store was not able to point to.

So for my loclahost i followed this approach. I created a folder in my project and kept the entire chain of certificates in the folder and in my scripts for dev-server(package.json) i added this alongwith server script so that node js can reference the path.

"dev-server":set NODE_EXTRA_CA_CERTS=certificates/certs-bundle.crt

For my servers(different environments),I created a new environment variable as below and added it.I was using Openshift,but i suppose the concept will be same for others as well.

"name":NODE_EXTRA_CA_CERTS
"value":certificates/certs-bundle.crt

I didn't generate any certificate in my case as the entire chain of certificates was already available for me.

A solution that works with IIS7 and upwards: Display custom error page when file upload exceeds allowed size in ASP.NET MVC

I have found another solution but quite different and i'll explain it

Basically, i used the tag to show the image, but i wanted to go to another page when the image was clicked and here is how i did it.

<a href="the-url-you-want-to-go-when-image-is-clicked.com" />
<img src="image-source-url-location.com" />

If you put it right next to each other, separated by a new line, i guess when you click the image, it goes to the tag which has the href to the other site you want to redirect.

First, you need to make certain you have multiple JAVA versions installed. Open a new Terminal window and input:

/usr/libexec/java_home -V

Your output should look like:

Matching Java Virtual Machines (2):
11.0.1, x86_64: "Java SE 11.0.1" /Library/Java/JavaVirtualMachines/jdk-11.0.1.jdk/Contents/Home
1.8.0_201, x86_64: "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_201.jdk/Contents/Home

Note that there are two JDKs available. If you don’t notice the Java version you need to switch to, download and install the appropriate one from here (JDK 8 is represented as 1.8) . Once you have installed the appropriate JDK, repeat this step.

2. Take note of the JDK version you want to switch to. For example, “11.0” and “1.8” are the JDK versions available in the example above.

3. Switch to the desired version. For example, if you wish to switch to JDK 8, input the following line:

   export JAVA_HOME=/usr/libexec/java_home -v 1.8

For 11.0, switch “1.8” with “11.0” 4. Check your JDK version by inputting into Terminal:

java -version

If you have followed all the steps correctly, the JDK version should correlate with the one you specified in the last step. 5. (Optional) To make this the default JDK version, input the following in Terminal:

open ~/.bash_profile

Then, add your Terminal input from step 3 to this file:

SWITCH TO JAVA VERSION 8

export JAVA_HOME=`/usr/libexec/java_home -v 1.8`

Save and close the file.

I realize that this question is quite old, but I had a similar problem, except my string had spaces included in it. For those that need to know how to separate a string with more than just commas:

string str = "Tom, Scott, Bob";
  IList<string> names = str.Split(new string[] {","," "},
  StringSplitOptions.RemoveEmptyEntries);

The StringSplitOptions removes the records that would only be a space char...

Following are some of the places where you can use annotations.

a. Annotations can be used by compiler to detect errors and suppress warnings
b. Software tools can use annotations to generate code, xml files, documentation etc., For example, Javadoc use annotations while generating java documentation for your class.
c. Runtime processing of the application can be possible via annotations.
d. You can use annotations to describe the constraints (Ex: @Null, @NotNull, @Max, @Min, @Email).
e. Annotations can be used to describe type of an element. Ex: @Entity, @Repository, @Service, @Controller, @RestController, @Resource etc.,
f. Annotation can be used to specify the behaviour. Ex: @Transactional, @Stateful
g. Annotation are used to specify how to process an element. Ex: @Column, @Embeddable, @EmbeddedId
h. Test frameworks like junit and testing use annotations to define test cases (@Test), define test suites (@Suite) etc.,
i. AOP (Aspect Oriented programming) use annotations (@Before, @After, @Around etc.,)
j. ORM tools like Hibernate, Eclipselink use annotations

You can refer this link for more details on annotations.

You can refer this link to see how annotations are used to build simple test suite.

1. Due to the way that strings are stored in Perl, getting the length of a string is optimized.
   if (length $str) is a good way of checking that a string is non-empty.

2. If you're in a situation where you haven't already guarded against undef, then the catch-all for "non-empty" that won't warn is if (defined $str and length $str).

SELECT * FROM "comments" JOIN (
  SELECT 1 as "id",1 as "order" UNION ALL 
  SELECT 3,2 UNION ALL SELECT 2,3 UNION ALL SELECT 4,4
) j ON "comments"."id" = j."id" ORDER BY j.ORDER

or if you prefer evil over good:

SELECT * FROM "comments" WHERE ("comments"."id" IN (1,3,2,4))
ORDER BY POSITION(','+"comments"."id"+',' IN ',1,3,2,4,')

Mongo includes a mongoexport utility (see docs) which can dump a collection. This utility uses the native libmongoclient and is likely the fastest method.

mongoexport -d <database> -c <collection_name>

Also helpful:

-o: write the output to file, otherwise standard output is used (docs)

--jsonArray: generates a valid json document, instead of one json object per line (docs)

--pretty: outputs formatted json (docs)

In my case storage was a problem. My hard drive was full... Make some space in hardware and your site will work fine

one way, works also for negative values

declare @1 decimal(4,3)
select @1 = 2.938

select PARSENAME(@1,1)

tl;dr

ZonedDateTime.parse( 
                        "Jun 13 2003 23:11:52.454 UTC" , 
                        DateTimeFormatter.ofPattern ( "MMM d uuuu HH:mm:ss.SSS z" ) 
                    )
              .toInstant()
              .toEpochMilli()

1055545912454

java.time

This Answer expands on the Answer by Lockni.

DateTimeFormatter

First define a formatting pattern to match your input string by creating a DateTimeFormatter object.

String input = "Jun 13 2003 23:11:52.454 UTC";
DateTimeFormatter f = DateTimeFormatter.ofPattern ( "MMM d uuuu HH:mm:ss.SSS z" );

ZonedDateTime

Parse the string as a ZonedDateTime. You can think of that class as: ( Instant + ZoneId ).

ZonedDateTime zdt = ZonedDateTime.parse ( "Jun 13 2003 23:11:52.454 UTC" , f );

zdt.toString(): 2003-06-13T23:11:52.454Z[UTC]

Count-from-epoch

I do not recommend tracking date-time values as a count-from-epoch. Doing so makes debugging tricky as humans cannot discern a meaningful date-time from a number so invalid/unexpected values may slip by. Also such counts are ambiguous, in granularity (whole seconds, milli, micro, nano, etc.) and in epoch (at least two dozen in by various computer systems).

But if you insist you can get a count of milliseconds from the epoch of first moment of 1970 in UTC (1970-01-01T00:00:00) through the Instant class. Be aware this means data-loss as you are truncating any nanoseconds to milliseconds.

Instant instant = zdt.toInstant ();

instant.toString(): 2003-06-13T23:11:52.454Z

long millisSinceEpoch = instant.toEpochMilli() ; 

1055545912454

About java.time

The java.time framework is built into Java 8 and later. These classes supplant the troublesome old legacy date-time classes such as java.util.Date, Calendar, & SimpleDateFormat.

To learn more, see the Oracle Tutorial. And search Stack Overflow for many examples and explanations. Specification is JSR 310.

The Joda-Time project, now in maintenance mode, advises migration to the java.time classes.

You may exchange java.time objects directly with your database. Use a JDBC driver compliant with JDBC 4.2 or later. No need for strings, no need for java.sql.* classes.

Where to obtain the java.time classes?

• Java SE 8, Java SE 9, Java SE 10, Java SE 11, and later - Part of the standard Java API with a bundled implementation.
  • Java 9 adds some minor features and fixes.
• Java SE 6 and Java SE 7
  • Most of the java.time functionality is back-ported to Java 6 & 7 in ThreeTen-Backport.
• Android
  • Later versions of Android bundle implementations of the java.time classes.
  • For earlier Android (<26), the ThreeTenABP project adapts ThreeTen-Backport (mentioned above). See How to use ThreeTenABP….

The ThreeTen-Extra project extends java.time with additional classes. This project is a proving ground for possible future additions to java.time. You may find some useful classes here such as Interval, YearWeek, YearQuarter, and more.

You can add to the system-path at runtime:

import sys
sys.path.insert(0, 'path/to/your/py_file')

import py_file

This is by far the easiest way to do it.

You can write an extra function to process form data and you should add your nonform data as the data valu in the form.seethe example :

<form method="POST" id="add-form">
    <div class="form-group required ">
        <label for="key">Enter key</label>
        <input type="text" name="key" id="key"  data-nonformdata="hai"/>
    </div>
    <div class="form-group required ">
        <label for="name">Ente Name</label>
        <input type="text" name="name" id="name"  data-nonformdata="hello"/>
    </div>
    <input type="submit" id="add-formdata-btn" value="submit">
</form>

Then add this jquery for form processing

<script>
$(document).onready(function(){
    $('#add-form').submit(function(event){
        event.preventDefault();
        var formData = $("form").serializeArray();
        formData = processFormData(formData);
        // write further code here---->
    });
});
processFormData(formData)
{
    var data = formData;
    data.forEach(function(object){
        $('#add-form input').each(function(){
            if(this.name == object.name){
                var nonformData = $(this).data("nonformdata");
                formData.push({name:this.name,value:nonformData});
            }
        });
    });
    return formData;
}

Because, at least in HTML 4.01 and XHTML 1(.1), the type attribute for <script> elements is required.

In HTML 5, type is no longer required.

In fact, while you should use text/javascript in your HTML source, many servers will send the file with Content-type: application/javascript. Read more about these MIME types in RFC 4329.

Notice the difference between RFC 4329, that marked text/javascript as obsolete and recommending the use of application/javascript, and the reality in which some browsers freak out on <script> elements containing type="application/javascript" (in HTML source, not the HTTP Content-type header of the file that gets send). Recently, there was a discussion on the WHATWG mailing list about this discrepancy (HTML 5's type defaults to text/javascript), read these messages with subject Will you consider about RFC 4329?

If you're just looking to convert a given number of seconds into HH:MI:SS format, this should do it

SELECT 
    TO_CHAR(TRUNC(x/3600),'FM9900') || ':' ||
    TO_CHAR(TRUNC(MOD(x,3600)/60),'FM00') || ':' ||
    TO_CHAR(MOD(x,60),'FM00')
FROM DUAL

where x is the number of seconds.

Cloud: the hardware running the application scales to meet the demand (potentially crossing multiple machines, networks, etc).

Grid: the application scales to take as much hardware as possible (for example in the hope of finding extra-terrestrial intelligence).

Cluster: this is an old term referring to one OS instance or one DB instance installed across multiple machines. It was done with special OS handling, proprietary drivers, low latency network cards with fat cables, and various hardware bedfellows.

(We love you SGI, but notice that "Cloud" and "Grid" are available to the little guy and your NUMAlink never has been...)

There is no tuple type in Go, and you are correct, the multiple values returned by functions do not represent a first-class object.

Nick's answer shows how you can do something similar that handles arbitrary types using interface{}. (I might have used an array rather than a struct to make it indexable like a tuple, but the key idea is the interface{} type)

My other answer shows how you can do something similar that avoids creating a type using anonymous structs.

These techniques have some properties of tuples, but no, they are not tuples.

XmlDocument doc = new XmlDocument();
   doc.Load("MonFichierXML.xml");

    XmlNode node = doc.SelectSingleNode("Magasin");

    XmlNodeList prop = node.SelectNodes("Items");

    foreach (XmlNode item in prop)
    {
        items Temp = new items();
        Temp.AssignInfo(item);
        lstitems.Add(Temp);
    }

It's possible that your configuration variables are cached. Verify your config/app.php as well as your .env file then try

php artisan cache:clear

on the command line.

I wouldn't advise you to do this but on my personal computer I disabled the firewall so that maven could get the required plugins.

for mysql its length not len

SELECT MAX(LENGTH(Desc)) FROM table_name

If you're:

• On Mac and have iTerm
• Want to start various processes that stay open long-term / until Ctrl+C
• Want to be able to easily see the output from each process
• Want to be able to easily stop a specific process with Ctrl+C

One option is scripting the terminal itself if your use case is more app monitoring / management.

For example I recently did the following. Granted it's Mac specific, iTerm specific, and relies on a deprecated Apple Script API (iTerm has a newer Python option). It doesn't win any elegance awards but gets the job done.

#!/bin/sh
root_path="~/root-path"
auth_api_script="$root_path/auth-path/auth-script.sh"
admin_api_proj="$root_path/admin-path/admin.csproj"
agent_proj="$root_path/agent-path/agent.csproj"
dashboard_path="$root_path/dashboard-web"

osascript <<THEEND
tell application "iTerm"
  set newWindow to (create window with default profile)

  tell current session of newWindow
    set name to "Auth API"
    write text "pushd $root_path && $auth_api_script"
  end tell

  tell newWindow
    set newTab to (create tab with default profile)
    tell current session of newTab
        set name to "Admin API"
        write text "dotnet run --debug -p $admin_api_proj"
    end tell
  end tell

  tell newWindow
    set newTab to (create tab with default profile)
    tell current session of newTab
        set name to "Agent"
        write text "dotnet run --debug -p $agent_proj"
    end tell
  end tell

  tell newWindow
    set newTab to (create tab with default profile)
    tell current session of newTab
        set name to "Dashboard"
        write text "pushd $dashboard_path; ng serve -o"
    end tell
  end tell

end tell
THEEND

If you actually care about ordering your paths from shortest path to longest path then it would be far better to use a modified A* or Dijkstra Algorithm. With a slight modification the algorithm will return as many of the possible paths as you want in order of shortest path first. So if what you really want are all possible paths ordered from shortest to longest then this is the way to go.

If you want an A* based implementation capable of returning all paths ordered from the shortest to the longest, the following will accomplish that. It has several advantages. First off it is efficient at sorting from shortest to longest. Also it computes each additional path only when needed, so if you stop early because you dont need every single path you save some processing time. It also reuses data for subsequent paths each time it calculates the next path so it is more efficient. Finally if you find some desired path you can abort early saving some computation time. Overall this should be the most efficient algorithm if you care about sorting by path length.

import java.util.*;

public class AstarSearch {
    private final Map<Integer, Set<Neighbor>> adjacency;
    private final int destination;

    private final NavigableSet<Step> pending = new TreeSet<>();

    public AstarSearch(Map<Integer, Set<Neighbor>> adjacency, int source, int destination) {
        this.adjacency = adjacency;
        this.destination = destination;

        this.pending.add(new Step(source, null, 0));
    }

    public List<Integer> nextShortestPath() {
        Step current = this.pending.pollFirst();
        while( current != null) {
            if( current.getId() == this.destination )
                return current.generatePath();
            for (Neighbor neighbor : this.adjacency.get(current.id)) {
                if(!current.seen(neighbor.getId())) {
                    final Step nextStep = new Step(neighbor.getId(), current, current.cost + neighbor.cost + predictCost(neighbor.id, this.destination));
                    this.pending.add(nextStep);
                }
            }
            current = this.pending.pollFirst();
        }
        return null;
    }

    protected int predictCost(int source, int destination) {
        return 0; //Behaves identical to Dijkstra's algorithm, override to make it A*
    }

    private static class Step implements Comparable<Step> {
        final int id;
        final Step parent;
        final int cost;

        public Step(int id, Step parent, int cost) {
            this.id = id;
            this.parent = parent;
            this.cost = cost;
        }

        public int getId() {
            return id;
        }

        public Step getParent() {
            return parent;
        }

        public int getCost() {
            return cost;
        }

        public boolean seen(int node) {
            if(this.id == node)
                return true;
            else if(parent == null)
                return false;
            else
                return this.parent.seen(node);
        }

        public List<Integer> generatePath() {
            final List<Integer> path;
            if(this.parent != null)
                path = this.parent.generatePath();
            else
                path = new ArrayList<>();
            path.add(this.id);
            return path;
        }

        @Override
        public int compareTo(Step step) {
            if(step == null)
                return 1;
            if( this.cost != step.cost)
                return Integer.compare(this.cost, step.cost);
            if( this.id != step.id )
                return Integer.compare(this.id, step.id);
            if( this.parent != null )
                this.parent.compareTo(step.parent);
            if(step.parent == null)
                return 0;
            return -1;
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) return true;
            if (o == null || getClass() != o.getClass()) return false;
            Step step = (Step) o;
            return id == step.id &&
                cost == step.cost &&
                Objects.equals(parent, step.parent);
        }

        @Override
        public int hashCode() {
            return Objects.hash(id, parent, cost);
        }
    }

   /*******************************************************
   *   Everything below here just sets up your adjacency  *
   *   It will just be helpful for you to be able to test *
   *   It isnt part of the actual A* search algorithm     *
   ********************************************************/

    private static class Neighbor {
        final int id;
        final int cost;

        public Neighbor(int id, int cost) {
            this.id = id;
            this.cost = cost;
        }

        public int getId() {
            return id;
        }

        public int getCost() {
            return cost;
        }
    }

    public static void main(String[] args) {
        final Map<Integer, Set<Neighbor>> adjacency = createAdjacency();
        final AstarSearch search = new AstarSearch(adjacency, 1, 4);
        System.out.println("printing all paths from shortest to longest...");
        List<Integer> path = search.nextShortestPath();
        while(path != null) {
            System.out.println(path);
            path = search.nextShortestPath();
        }
    }

    private static Map<Integer, Set<Neighbor>> createAdjacency() {
        final Map<Integer, Set<Neighbor>> adjacency = new HashMap<>();

        //This sets up the adjacencies. In this case all adjacencies have a cost of 1, but they dont need to.
        addAdjacency(adjacency, 1,2,1,5,1);         //{1 | 2,5}
        addAdjacency(adjacency, 2,1,1,3,1,4,1,5,1); //{2 | 1,3,4,5}
        addAdjacency(adjacency, 3,2,1,5,1);         //{3 | 2,5}
        addAdjacency(adjacency, 4,2,1);             //{4 | 2}
        addAdjacency(adjacency, 5,1,1,2,1,3,1);     //{5 | 1,2,3}

        return Collections.unmodifiableMap(adjacency);
    }

    private static void addAdjacency(Map<Integer, Set<Neighbor>> adjacency, int source, Integer... dests) {
        if( dests.length % 2 != 0)
            throw new IllegalArgumentException("dests must have an equal number of arguments, each pair is the id and cost for that traversal");

        final Set<Neighbor> destinations = new HashSet<>();
        for(int i = 0; i < dests.length; i+=2)
            destinations.add(new Neighbor(dests[i], dests[i+1]));
        adjacency.put(source, Collections.unmodifiableSet(destinations));
    }
}

The output from the above code is the following:

[1, 2, 4]
[1, 5, 2, 4]
[1, 5, 3, 2, 4]

Notice that each time you call nextShortestPath() it generates the next shortest path for you on demand. It only calculates the extra steps needed and doesnt traverse any old paths twice. Moreover if you decide you dont need all the paths and end execution early you've saved yourself considerable computation time. You only compute up to the number of paths you need and no more.

Finally it should be noted that the A* and Dijkstra algorithms do have some minor limitations, though I dont think it would effect you. Namely it will not work right on a graph that has negative weights.

Here is a link to JDoodle where you can run the code yourself in the browser and see it working. You can also change around the graph to show it works on other graphs as well: http://jdoodle.com/a/ukx

Using RxJs, you can declare a Subject in your parent component and pass it as Observable to child component, child component just need to subscribe to this Observable.

Parent-Component

eventsSubject: Subject<void> = new Subject<void>();

emitEventToChild() {
  this.eventsSubject.next();
}

Parent-HTML

<child [events]="eventsSubject.asObservable()"> </child>    

Child-Component

private eventsSubscription: Subscription;

@Input() events: Observable<void>;

ngOnInit(){
  this.eventsSubscription = this.events.subscribe(() => doSomething());
}

ngOnDestroy() {
  this.eventsSubscription.unsubscribe();
}

use this code it is working

// index.jsp or login.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>

<form action="login" method="post">
Username : <input type="text" name="username"><br>
Password : <input type="password" name="pass"><br>
<input type="submit"><br>
</form>

</body>
</html>

// authentication servlet class

    import java.io.IOException;
    import java.io.PrintWriter;
    import java.sql.Connection;
    import java.sql.DriverManager;
    import java.sql.SQLException;
    import java.sql.Statement;

    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;

    public class auth extends HttpServlet {
        private static final long serialVersionUID = 1L;

        public auth() {
            super();
        }
        protected void doGet(HttpServletRequest request,
                HttpServletResponse response) throws ServletException, IOException {

        }

        protected void doPost(HttpServletRequest request,
                HttpServletResponse response) throws ServletException, IOException {

            try {
                Class.forName("com.mysql.jdbc.Driver");
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
            }

            String username = request.getParameter("username");
            String pass = request.getParameter("pass");

            String sql = "select * from reg where username='" + username + "'";
            Connection conn = null;

            try {
                conn = DriverManager.getConnection("jdbc:mysql://localhost/Exam",
                        "root", "");
                Statement s = conn.createStatement();

                java.sql.ResultSet rs = s.executeQuery(sql);
                String un = null;
                String pw = null;
                String name = null;

            /* Need to put some condition in case the above query does not return any row, else code will throw Null Pointer exception */   

            PrintWriter prwr1 = response.getWriter();               
            if(!rs.isBeforeFirst()){
                prwr1.write("<h1> No Such User in Database<h1>");
            } else {

/* Conditions to be executed after at least one row is returned by query execution */ 
                while (rs.next()) {
                    un = rs.getString("username");
                    pw = rs.getString("password");
                    name = rs.getString("name");
                }

                PrintWriter pww = response.getWriter();

                if (un.equalsIgnoreCase(username) && pw.equals(pass)) {
                                // use this or create request dispatcher 
                    response.setContentType("text/html");
                    pww.write("<h1>Welcome, " + name + "</h1>");
                } else {
                    pww.write("wrong username or password\n");
                }
              }

            } catch (SQLException e) {
                e.printStackTrace();
            }

        }

    }

I had the same error for quite a while, and here what fixed it for me.

I simply declared in service that i use what follows:

Description= Your node service description
After=network.target

[Service]
Type=forking
PIDFile=/tmp/node_pid_name.pid
Restart=on-failure
KillSignal=SIGQUIT
WorkingDirectory=/path/to/node/app/root/directory
ExecStart=/path/to/node /path/to/server.js

[Install]
WantedBy=multi-user.target

What should catch your attention here is "After=network.target". I spent days and days looking for fixes on nginx side, while the problem was just that. To be sure, stop running the node service you have, launch the ExecStart command directly and try to reproduce the bug. If it doesn't pop, it just means that your service has a problem. At least this is how i found my answer.

For everybody else, good luck!

Please try this

error_reporting = E_ALL & ~E_NOTICE

in php.ini

There is an alternative approach, which does not have I18n problems (allowing ',' or '.' but not both): Decimal.TryParse.

Just try converting, ignoring the value.

bool IsDecimalFormat(string input) {
  Decimal dummy;
  return Decimal.TryParse(input, out dummy);
}

This is significantly faster than using a regular expression, see below.

(The overload of Decimal.TryParse can be used for finer control.)

Performance test results: Decimal.TryParse: 0.10277ms, Regex: 0.49143ms

Code (PerformanceHelper.Run is a helper than runs the delegate for passed iteration count and returns the average TimeSpan.):

using System;
using System.Text.RegularExpressions;
using DotNetUtils.Diagnostics;

class Program {
    static private readonly string[] TestData = new string[] {
        "10.0",
        "10,0",
        "0.1",
        ".1",
        "Snafu",
        new string('x', 10000),
        new string('2', 10000),
        new string('0', 10000)
    };

    static void Main(string[] args) {
        Action parser = () => {
            int n = TestData.Length;
            int count = 0;
            for (int i = 0; i < n; ++i) {
                decimal dummy;
                count += Decimal.TryParse(TestData[i], out dummy) ? 1 : 0;
            }
        };
        Regex decimalRegex = new Regex(@"^[0-9]([\.\,][0-9]{1,3})?$");
        Action regex = () => {
            int n = TestData.Length;
            int count = 0;
            for (int i = 0; i < n; ++i) {
                count += decimalRegex.IsMatch(TestData[i]) ? 1 : 0;
            }
        };

        var paserTotal = 0.0;
        var regexTotal = 0.0;
        var runCount = 10;
        for (int run = 1; run <= runCount; ++run) {
            var parserTime = PerformanceHelper.Run(10000, parser);
            var regexTime = PerformanceHelper.Run(10000, regex);

            Console.WriteLine("Run #{2}: Decimal.TryParse: {0}ms, Regex: {1}ms",
                              parserTime.TotalMilliseconds, 
                              regexTime.TotalMilliseconds,
                              run);
            paserTotal += parserTime.TotalMilliseconds;
            regexTotal += regexTime.TotalMilliseconds;
        }

        Console.WriteLine("Overall averages: Decimal.TryParse: {0}ms, Regex: {1}ms",
                          paserTotal/runCount,
                          regexTotal/runCount);
    }
}

Here's what I was able to get working on version 5.4.2 (from the nuget install) to return a pdf response from an asp.net mvc controller. It could be modfied to use a FileStream instead of MemoryStream for the output if that's what is needed.

I post it here because it is a complete example of current iTextSharp usage for the html -> pdf conversion (disregarding images, I haven't looked at that since my usage doesn't require it)

It uses iTextSharp's XmlWorkerHelper, so the incoming hmtl must be valid XHTML, so you may need to do some fixup depending on your input.

using iTextSharp.text.pdf;
using iTextSharp.tool.xml;
using System.IO;
using System.Web.Mvc;

namespace Sample.Web.Controllers
{
    public class PdfConverterController : Controller
    {
        [ValidateInput(false)]
        [HttpPost]
        public ActionResult HtmlToPdf(string html)
        {           

            html = @"<?xml version=""1.0"" encoding=""UTF-8""?>
                 <!DOCTYPE html 
                     PUBLIC ""-//W3C//DTD XHTML 1.0 Strict//EN""
                    ""http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"">
                 <html xmlns=""http://www.w3.org/1999/xhtml"" xml:lang=""en"" lang=""en"">
                    <head>
                        <title>Minimal XHTML 1.0 Document with W3C DTD</title>
                    </head>
                  <body>
                    " + html + "</body></html>";

            var bytes = System.Text.Encoding.UTF8.GetBytes(html);

            using (var input = new MemoryStream(bytes))
            {
                var output = new MemoryStream(); // this MemoryStream is closed by FileStreamResult

                var document = new iTextSharp.text.Document(iTextSharp.text.PageSize.LETTER, 50, 50, 50, 50);
                var writer = PdfWriter.GetInstance(document, output);
                writer.CloseStream = false;
                document.Open();

                var xmlWorker = XMLWorkerHelper.GetInstance();
                xmlWorker.ParseXHtml(writer, document, input, null);
                document.Close();
                output.Position = 0;

                return new FileStreamResult(output, "application/pdf");
            }
        }
    }
}

request.data will be empty if request.headers["Content-Type"] is recognized as form data, which will be parsed into request.form. To get the raw data regardless of content type, use request.get_data().

request.data calls request.get_data(parse_form_data=True), which results in the different behavior for form data.

I wrote this code. I guess it can help someone...

Public Function VerifyCollection()
    For i = 1 To 10 Step 1
       MyKey = "A"
       On Error GoTo KillError:
       Dispersao.Add 1, MyKey
       GoTo KeepInForLoop
KillError: 'If My collection already has the key A Then...
        count = Dispersao(MyKey)
        Dispersao.Remove (MyKey)
        Dispersao.Add count + 1, MyKey 'Increase the amount in relationship with my Key
        count = Dispersao(MyKey) 'count = new amount
        On Error GoTo -1
KeepInForLoop:
    Next
End Function

exitcode = data.wait(). The child process will be blocked If it writes to standard output/error, and/or reads from standard input, and there are no peers.

What I did is first check what are the running processes by

SELECT * FROM pg_stat_activity WHERE state = 'active';

Find the process you want to kill, then type:

SELECT pg_cancel_backend(<pid of the process>)

This basically "starts" a request to terminate gracefully, which may be satisfied after some time, though the query comes back immediately.

If the process cannot be killed, try:

SELECT pg_terminate_backend(<pid of the process>)

If your data has the names grouped as shown then you can use this formula in D2 copied down to get a total against the last entry for each name

=IF((A2=A3)*(B2=B3),"",SUM(C$2:C2)-SUM(D$1:D1))

See screenshot

$('#form-btn').click(function () {
//set global rules & messages array to use in validator
   var rules = {};
   var messages = {};
//get input, select, textarea of form
   $('#formId').find('input, select, textarea').each(function () {
      var name = $(this).attr('name');
      rules[name] = {};
      messages[name] = {};

      rules[name] = {required: true}; // set required true against every name
//apply more rules, you can also apply custom rules & messages
      if (name === "email") {
         rules[name].email = true;
         //messages[name].email = "Please provide valid email";
      }
      else if(name==='url'){
        rules[name].required = false; // url filed is not required
//add other rules & messages
      }
   });
//submit form and use above created global rules & messages array
   $('#formId').submit(function (e) {
            e.preventDefault();
        }).validate({
            rules: rules,
            messages: messages,
            submitHandler: function (form) {
            console.log("validation success");
            }
        });
});

You can't get a path to file from WhatsApp. They don't expose it now. The only thing you can get is InputStream:

InputStream is = getContentResolver().openInputStream(Uri.parse("content://com.whatsapp.provider.media/item/16695"));

Using is you can show a picture from WhatsApp in your app.

Use java -cp myjar.jar com.mypackage.myClass.

1. If the class is not in a package then simply java -cp myjar.jar myClass.

2. If you are not within the directory where myJar.jar is located, then you can do:

   1. On Unix or Linux platforms:

      java -cp /location_of_jar/myjar.jar com.mypackage.myClass

   2. On Windows:

      java -cp c:\location_of_jar\myjar.jar com.mypackage.myClass

If you need to do this once just follow Charles' descriptions, but it is also possible to do this with Excel formulas and helper columns in case you want to make the filter dynamic.

Lets assume you data is on the sheet DataSheet and starts in row 2 of the following columns:

• A: lastname
• B: firstname
• C: phonenumber

You need two helper columns on this sheet.

• D2: =if(A2 = "", 1, 0), this is the filter column, corresponding to your where condition
• E2: =if(D2 <> 1, "", sumifs(D$2:D$1048576, A$2:A$1048576, "<"&A2) + sumifs(D$2:D2, A$2:A2, A2)), this corresponds to the order by

Copy down these formulas as far as your data goes.

On the sheet which should display your result create the following columns.

• A: A sequence of numbers starting with 1 in row 2, this limits the total number of rows you can get (kind like a limit in sequel)
• B2: =match(A2, DataSheet!$E$2:$E$1048576, 0), this is the row of the corresponding data
• C2: =iferror(index(DataSheet!A$2:A$1048576, $B2), ""), this is the actual data or empty if no data exists

Copy down the formulas in B2 and C2 and copy-past column C to D and E.

The correct, server-side, solution: Better Way to Prevent IE Cache in AngularJS?

[OutputCache(NoStore = true, Duration = 0, VaryByParam = "None")]
public ActionResult Get()
{
    // return your response
}

So after a number of tries, I found it working.

Please follow the order sequence it's very important else it won't work

axios.delete(URL, {
  headers: {
    Authorization: authorizationToken
  },
  data: {
    source: source
  }
});

When testing range against xrange in a loop (I know I should use timeit, but this was swiftly hacked up from memory using a simple list comprehension example) I found the following:

import time

for x in range(1, 10):

    t = time.time()
    [v*10 for v in range(1, 10000)]
    print "range:  %.4f" % ((time.time()-t)*100)

    t = time.time()
    [v*10 for v in xrange(1, 10000)]
    print "xrange: %.4f" % ((time.time()-t)*100)

which gives:

$python range_tests.py
range:  0.4273
xrange: 0.3733
range:  0.3881
xrange: 0.3507
range:  0.3712
xrange: 0.3565
range:  0.4031
xrange: 0.3558
range:  0.3714
xrange: 0.3520
range:  0.3834
xrange: 0.3546
range:  0.3717
xrange: 0.3511
range:  0.3745
xrange: 0.3523
range:  0.3858
xrange: 0.3997 <- garbage collection?

Or, using xrange in the for loop:

range:  0.4172
xrange: 0.3701
range:  0.3840
xrange: 0.3547
range:  0.3830
xrange: 0.3862 <- garbage collection?
range:  0.4019
xrange: 0.3532
range:  0.3738
xrange: 0.3726
range:  0.3762
xrange: 0.3533
range:  0.3710
xrange: 0.3509
range:  0.3738
xrange: 0.3512
range:  0.3703
xrange: 0.3509

Is my snippet testing properly? Any comments on the slower instance of xrange? Or a better example :-)

function IsNumeric(num) {
    return ((num >=0 || num < 0)&& (parseInt(num)==num) );
}

In my case I forgot it was packaging conflict jar vs pom. I forgot to write

<packaging>pom</packaging>

In every child pom.xml file

This is a Python 101 type question,

It's a simple question but one where the answer is not so simple.

In python3, a "bytes" object represents a sequence of bytes, a "string" object represents a sequence of unicode code points.

To convert between from "bytes" to "string" and from "string" back to "bytes" you use the bytes.decode and string.encode functions. These functions take two parameters, an encoding and an error handling policy.

Sadly there are an awful lot of cases where sequences of bytes are used to represent text, but it is not necessarily well-defined what encoding is being used. Take for example filenames on unix-like systems, as far as the kernel is concerned they are a sequence of bytes with a handful of special values, on most modern distros most filenames will be UTF-8 but there is no gaurantee that all filenames will be.

If you want to write robust software then you need to think carefully about those parameters. You need to think carefully about what encoding the bytes are supposed to be in and how you will handle the case where they turn out not to be a valid sequence of bytes for the encoding you thought they should be in. Python defaults to UTF-8 and erroring out on any byte sequence that is not valid UTF-8.

print(bytesThing)

Python uses "repr" as a fallback conversion to string. repr attempts to produce python code that will recreate the object. In the case of a bytes object this means among other things escaping bytes outside the printable ascii range.

Use sortedWith to sort a list with Comparator.

You can then construct a comparator using several ways:

• compareBy, thenBy construct the comparator in a chain of calls:

  list.sortedWith(compareBy<Person> { it.age }.thenBy { it.name }.thenBy { it.address })
  

• compareBy has an overload which takes multiple functions:

  list.sortedWith(compareBy({ it.age }, { it.name }, { it.address }))
  

here email is your email-id.

  public boolean validateEmail(String email) {

    Pattern pattern;
    Matcher matcher;
    String EMAIL_PATTERN = "^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$";
    pattern = Pattern.compile(EMAIL_PATTERN);
    matcher = pattern.matcher(email);
    return matcher.matches();

    }

Here's one more answer that I've found to be pretty concise and doesn't use external packages:

import datetime as dt
import calendar

# Today, in `dt.date` type
day = dt.datetime.now().date()

one_year_delta = dt.timedelta(days=366 if ((day.month >= 3 and calendar.isleap(day.year+1)) or
                                            (day.month < 3 and calendar.isleap(day.year))) else 365)

# Add one year to the current date
print(day + one_year_delta)

datetime2 wins in most aspects except (old apps Compatibility)

1. larger range of values
2. better Accuracy
3. smaller storage space (if optional user-specified precision is specified)

please note the following points

• Syntax
  • datetime2[(fractional seconds precision=> Look Below Storage Size)]
• Precision, scale
  • 0 to 7 digits, with an accuracy of 100ns.
  • The default precision is 7 digits.
• Storage Size
  • 6 bytes for precision less than 3;
  • 7 bytes for precision 3 and 4.
  • All other precision require 8 bytes.
• DateTime2(3) have the same number of digits as DateTime but uses 7 bytes of storage instead of 8 byte (SQLHINTS- DateTime Vs DateTime2)
• Find more on datetime2(Transact-SQL MSDN article)

image source : MCTS Self-Paced Training Kit (Exam 70-432): Microsoft® SQL Server® 2008 - Implementation and Maintenance Chapter 3:Tables -> Lesson 1: Creating Tables -> page 66

To achieve this there are basically two methods which I frequently use:

1. Using the cursor escape character (\c) with echo -e

Example :

for i in {0..10..2}; do
  echo -e "$i \c"              
done
# 0 2 4 6 8 10

• -e flag enables the Escape characters in the string.
• \c brings the Cursor back to the current line.

OR

2. Using the printf command

Example:

for ((i = 0; i < 5; ++i)); do
  printf "$i "
done
# 0 1 2 3 4