If you are writing in C++ you are probably writing for performance. Using new and the free store is much slower than using the stack (especially when using threads) so only use it when you need it.

As others have said, you need new when your object needs to live outside the function or object scope, the object is really large or when you don't know the size of an array at compile time.

Also, try to avoid ever using delete. Wrap your new into a smart pointer instead. Let the smart pointer call delete for you.

There are some cases where a smart pointer isn't smart. Never store std::auto_ptr<> inside a STL container. It will delete the pointer too soon because of copy operations inside the container. Another case is when you have a really large STL container of pointers to objects. boost::shared_ptr<> will have a ton of speed overhead as it bumps the reference counts up and down. The better way to go in that case is to put the STL container into another object and give that object a destructor that will call delete on every pointer in the container.

We can get the distinct similar to the example shown below

 //example
           var  distinctValues =  DetailedBreakDown_Table.AsEnumerable().Select(r => new
            {
                InvestmentVehicleID = r.Field<string>("InvestmentVehicleID"),
                Universe = r.Field<string>("Universe"),
                AsOfDate = _imqDate,
                Ticker = "",
                Cusip = "",
                PortfolioDate = r.Field<DateTime>("PortfolioDate")

            } ).Distinct();

If someone is still finding it hard, this simple thing worked for me:

1. On you main system let's say Hosting PC... Go to Control Panel > Windows Defender Firewall > Allow an app or feature through Windows Defender Firewall > Change settings > Find "Apache HTTP Server" > Check both the check-boxes (under Private & Public). See Screenshot

   • In my case there were two "Apache HTTP Server" entries, so I checked both the check-boxes for both entries.

2. On any another system connected over a same network... Open browser > type: your hosting pc's IP adress followed by your project name in the url bar. Example: 192.168.72.111/example.com/

Hope it helps! Thanks.

#train_size is 1 - tst_size - vld_size
tst_size=0.15
vld_size=0.15

X_train_test, X_valid, y_train_test, y_valid = train_test_split(df.drop(y, axis=1), df.y, test_size = vld_size, random_state=13903) 

X_train_test_V=pd.DataFrame(X_train_test)
X_valid=pd.DataFrame(X_valid)

X_train, X_test, y_train, y_test = train_test_split(X_train_test, y_train_test, test_size=tst_size, random_state=13903)

While I agree with the previous answers, it's important to note how to access the code of those external libraries.

For example to access a class in the external library, you will want to use the import keyword followed by the external library's name, continued with dot notation until the desired class is reached.

Look at the image below to see how I import CodeGenerationException class from the quickfixj library.

…just because this method hasn't been mentioned so far - open the console and type:

$ === jQuery

As @Juhana mentioned above $().jquery will return the version number.

For compiling a c program on your latest macOS just type the following in terminal after saving the file with a .c extension and on reaching the path where the file is saved :

cc yourfilename.c

Once you have checked all the errors after compilation (if any), type the following for executing the code :

./a.out

These commands are tested on macOS Mojave and are working perfectly fine, cheers coding!

I use my local ip for that i.e. 192.168.0.1 and it works.

will the height attribute stretch the image beyond its native resolution? If I have a image with a height of say 420 pixels, I can't get css to stretch the image beyond the native resolution to fill the height of the viewport.

I am getting pretty close results with:

 .rightdiv img {
        max-width: 25vw;
        min-height: 100vh;
    }

the 100vh is getting pretty close, with just a few pixels left over at the bottom for some reason.

There is a file called config.inc.php in the phpmyadmin folder.

The file path is C:\wamp\apps\phpmyadmin4.0.4

Edit The auth_type 'cookie' to 'config' or 'http'

$cfg['Servers'][$i]['auth_type'] = 'cookie';

$cfg['Servers'][$i]['auth_type'] = 'config';

or

$cfg['Servers'][$i]['auth_type'] = 'http';

When you go to the phpmyadmin site then you will be asked for the username and password. This also secure external people from accessing your phpmyadmin application if you happen to have your web server exposed to outside connections.

Hashtags at the end of the URL bring a visitor to the element with the ID: e.g.

http://stackoverflow.com/questions/8424785/link-to-a-section-of-a-webpage#answers 

Would bring you to where the DIV with the ID 'answers' begins. Also, you can use the name attribute in anchor tags, to create the same effect.

Resource

Set the listview adapter to "simple_list_item_multiple_choice"

ArrayAdapter<String> adapter;

List<String> values; // put values in this

//Put in listview
adapter = new ArrayAdapter<UserProfile>(
this,
android.R.layout.simple_list_item_multiple_choice, 
values);
setListAdapter(adapter);    

Here is complete implementation in C/C++

#include <stdio.h>

void lineCount(int argc,char **argv){

        if(argc < 2){
             fprintf(stderr,"File required");
             return;
        }
        FILE *fp = fopen(argv[1],"r");



        if(!fp){
            fprintf(stderr,"Error in opening file");
            return ;      
        }

        int count = 1; //if a file open ,be it empty, it has atleast a newline char
        char temp;

        while(fscanf(fp,"%c",&temp) != -1){
                if(temp == 10) count++;
        }

        fprintf(stdout,"File has %d lines\n",count);
   }

int main(int argc,char **argv){

        lineCount(argc,argv);
        return 0;
}
https://github.com/KotoJallow/Line-Count/blob/master/lineCount.c

It is better to add CORS enabling code on Server Side. To enable CORS in NodeJS and ExpressJs based application following code should be included-

var app = express();

app.use(function(req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
  next();
});

This solution is working with Android Studio 4.0.1.

Apart from creating a new module as suggested in above solution, you can try this solution.

If you have multiple modules in your application and want to add aar to just one of the module then this solution come handy.

In your root project build.gradle

add

repositories {
mavenCentral()
flatDir {
    dirs 'libs'
}

Then in the module where you want to add the .aar file locally. simply add below lines of code.

dependencies {
api fileTree(include: ['*.aar'], dir: 'libs')
implementation files('libs/<yourAarName>.aar')

}

Happy Coding :)

Local fonts linking to your react js may be a failure. So, I prefer to use online css file from google to link fonts. Refer the following code,

<link href="https://fonts.googleapis.com/css?family=Roboto" rel="stylesheet">

or

<style>
    @import url('https://fonts.googleapis.com/css?family=Roboto');
</style>

if I understand you right (not sure), the start parameter /D should help you:

start "cmd" /D %PathName% %comd%

/D sets the start-directory (see start /?)

Since MongoDB version 3.2 you can use updateMany():

> db.yourCollection.updateMany({}, {$set:{"someField": "someValue"}})

Since all current answers use jQuery or tricks with iframe, figured there is no harm to add method with just plain JavaScript:

function formSubmit(event) {
  var url = "/post/url/here";
  var request = new XMLHttpRequest();
  request.open('POST', url, true);
  request.onload = function() { // request successful
  // we can use server response to our request now
    console.log(request.responseText);
  };

  request.onerror = function() {
    // request failed
  };

  request.send(new FormData(event.target)); // create FormData from form that triggered event
  event.preventDefault();
}

// and you can attach form submit event like this for example
function attachFormSubmitEvent(formId){
  document.getElementById(formId).addEventListener("submit", formSubmit);
}

I think "works fine in Firefox" is in the Quirks mode rendering only. In the Standard mode rendering, that might not work fine in Firefox too.

percentage depends on "containing block", instead of viewport.

CSS Specification says

The percentage is calculated with respect to the height of the generated box's containing block. If the height of the containing block is not specified explicitly (i.e., it depends on content height), and this element is not absolutely positioned, the value computes to 'auto'.

so

#container { height: auto; }
#container #mainContentsWrapper { height: n%; }
#container #sidebarWrapper { height: n%; }

means

#container { height: auto; }
#container #mainContentsWrapper { height: auto; }
#container #sidebarWrapper { height: auto; }

To stretch to 100% height of viewport, you need to specify the height of the containing block (in this case, it's #container). Moreover, you also need to specify the height to body and html, because initial Containing Block is "UA-dependent".

All you need is...

html, body { height:100%; }
#container { height:100%; }

I think the closets thing to "with" is static using, but only works with static's methods or properties. e.g.

using static System.Math;
...
public double Area
{
   get { return PI * Pow(Radius, 2); } // PI == System.Math.PI
}

More Info: https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/using-static

I was struggling with similar problem (with mail) in one of my git's post_receive hooks and finally I found out, that sendmail actually works better for that kind of things, especially if you know a bit of how e-mails are constructed (and it seems like you know). I know this answer comes very late, but maybe it will be of some use to others too. I made use of heredoc operator and use of the feature, that it expands variables, so it can also run inlined scripts. Just check this out (bash script):

#!/bin/bash
recipients=(
    '[email protected]'
    '[email protected]'
#   '[email protected]'
);
sender='[email protected]';
subject='Oh, who really cares, seriously...';
sendmail -t <<-MAIL
    From: ${sender}
    `for r in "${recipients[@]}"; do echo "To: ${r}"; done;`
    Subject: ${subject}
    Content-Type: text/html; charset=UTF-8

    <html><head><meta charset="UTF-8"/></head>
    <body><p>Ladies and gents, here comes the report!</p>
    <pre>`mysql -u ***** -p***** -H -e "SELECT * FROM users LIMIT 20"`</pre>
    </body></html>
MAIL

Note of backticks in the MAIL part to generate some output and remember, that <<- operator strips only tabs (not spaces) from the beginning of lines, so in that case copy-paste will not work (you need to replace indentation with proper tabs). Or use << operator and make no indentation at all. Hope this will help someone. Of course you can use backticks outside o MAIL part and save the output into some variable, that you can later use in the MAIL part — matter of taste and readability. And I know, #!/bin/bash does not always work on every system.

public static void main(String args[])
{
    omtZip("res/", "omt.zip");
}
public static void omtZip(String path,String outputFile)
{
    final int BUFFER = 2048;
    boolean isEntry = false;
    ArrayList<String> directoryList = new ArrayList<String>();
    File f = new File(path);
    if(f.exists())
    {
    try {
            FileOutputStream fos = new FileOutputStream(outputFile);
            ZipOutputStream zos = new ZipOutputStream(new BufferedOutputStream(fos));
            byte data[] = new byte[BUFFER];

            if(f.isDirectory())
            {
               //This is Directory
                do{
                    String directoryName = "";
                    if(directoryList.size() > 0)
                    {
                        directoryName = directoryList.get(0);
                        System.out.println("Directory Name At 0 :"+directoryName);
                    }
                    String fullPath = path+directoryName;
                    File fileList = null;
                    if(directoryList.size() == 0)
                    {
                        //Main path (Root Directory)
                        fileList = f;
                    }else
                    {
                        //Child Directory
                        fileList = new File(fullPath);
                    }
                    String[] filesName = fileList.list();

                    int totalFiles = filesName.length;
                    for(int i = 0 ; i < totalFiles ; i++)
                    {
                        String name = filesName[i];
                        File filesOrDir = new File(fullPath+name);
                        if(filesOrDir.isDirectory())
                        {
                            System.out.println("New Directory Entry :"+directoryName+name+"/");
                            ZipEntry entry = new ZipEntry(directoryName+name+"/");
                            zos.putNextEntry(entry);
                            isEntry = true;
                            directoryList.add(directoryName+name+"/");
                        }else
                        {
                            System.out.println("New File Entry :"+directoryName+name);
                            ZipEntry entry = new ZipEntry(directoryName+name);
                            zos.putNextEntry(entry);
                            isEntry = true;
                            FileInputStream fileInputStream = new FileInputStream(filesOrDir);
                            BufferedInputStream bufferedInputStream = new BufferedInputStream(fileInputStream, BUFFER);
                            int size = -1;
                            while(  (size = bufferedInputStream.read(data, 0, BUFFER)) != -1  )
                            {
                                zos.write(data, 0, size);
                            }
                            bufferedInputStream.close();
                        }
                    }
                    if(directoryList.size() > 0 && directoryName.trim().length() > 0)
                    {
                        System.out.println("Directory removed :"+directoryName);
                        directoryList.remove(0);
                    }

                }while(directoryList.size() > 0);
            }else
            {
                //This is File
                //Zip this file
                System.out.println("Zip this file :"+f.getPath());
                FileInputStream fis = new FileInputStream(f);
                BufferedInputStream bis = new BufferedInputStream(fis,BUFFER);
                ZipEntry entry = new ZipEntry(f.getName());
                zos.putNextEntry(entry);
                isEntry = true;
                int size = -1 ;
                while(( size = bis.read(data,0,BUFFER)) != -1)
                {
                    zos.write(data, 0, size);
                }
            }               

            //CHECK IS THERE ANY ENTRY IN ZIP ? ----START
            if(isEntry)
            {
              zos.close();
            }else
            {
                zos = null;
                System.out.println("No Entry Found in Zip");
            }
            //CHECK IS THERE ANY ENTRY IN ZIP ? ----START
        }catch(Exception e)
        {
            e.printStackTrace();
        }
    }else
    {
        System.out.println("File or Directory not found");
    }
 }    

}

If the column is a timestamp you can do the following:

        if(fromDate!=null){
            criteria.add(Restrictions.sqlRestriction("TRUNC(COLUMN) >= TO_DATE('" + dataFrom + "','dd/mm/yyyy')"));
        }
        if(toDate!=null){               
            criteria.add(Restrictions.sqlRestriction("TRUNC(COLUMN) <= TO_DATE('" + dataTo + "','dd/mm/yyyy')"));
        }

        resultDB = criteria.list();

In Layman terms, you need to include external js file in your HTML file & thereafter you could directly call your JS method written in an external js file from HTML page. Follow the code snippet for insight:-

caller.html

<script type="text/javascript" src="external.js"></script>
<input type="button" onclick="letMeCallYou()" value="run external javascript">

external.js

function letMeCallYou()
{
    alert("Bazinga!!!  you called letMeCallYou")
}

Result :

We can maintain dynamic height for collection view cell without xib(only using storyboard).

- (CGSize)collectionView:(UICollectionView *)collectionView
                  layout:(UICollectionViewLayout*)collectionViewLayout
  sizeForItemAtIndexPath:(NSIndexPath *)indexPath {

        NSAttributedString* labelString = [[NSAttributedString alloc] initWithString:@"Your long string goes here" attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:17.0]}];
        CGRect cellRect = [labelString boundingRectWithSize:CGSizeMake(cellWidth, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin context:nil];

        return CGSizeMake(cellWidth, cellRect.size.height);
}

Make sure that numberOfLines in IB should be 0.

You can use an immediately-invoked function expression (IIFE) to create a closure around setTimeout:

for (var i = 1; i <= 3; i++) {_x000D_
    (function(index) {_x000D_
        setTimeout(function() { alert(index); }, i * 1000);_x000D_
    })(i);_x000D_
}

when the object is empty return this error:

Uncaught TypeError: Cannot read property '0' of null

I try this code :

try{
  if ($("#btext" + i).length) {};               
}catch(err){
  if ($("#btext" + i).length) {
     //working this code if the item, not NULL 
   }
}

You need to login to your mysql terminal first using mysql -u username -p password

Then use this:

SELECT @@sql_mode; or SELECT @@GLOBAL.sql_mode;

output will be like this:

STRICT_TRANS_TABLES,STRICT_ALL_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,TRADITIONAL,NO_AUTO_CREATE_USER,NO_ENGINE_SUB

You can also set sql mode by this:

SET GLOBAL sql_mode=TRADITIONAL;

I've also had the same issue ( Website body background rendering a right white margin in iPhone Safari ) and found that adding the background image to the <html> tag fixed the problem.

Before

body {background:url('images/back.jpg');}

After

html, body {background:url('images/back.jpg');}

SELECT q'[Alex's Tea Factory]' FROM DUAL

Your keys may already be in PEM format, but just named with .crt or .key.

If the file's content begins with -----BEGIN and you can read it in a text editor:

The file uses base64, which is readable in ASCII, not binary format. The certificate is already in PEM format. Just change the extension to .pem.

If the file is in binary:

For the server.crt, you would use

openssl x509 -inform DER -outform PEM -in server.crt -out server.crt.pem

For server.key, use openssl rsa in place of openssl x509.

The server.key is likely your private key, and the .crt file is the returned, signed, x509 certificate.

If this is for a Web server and you cannot specify loading a separate private and public key:

You may need to concatenate the two files. For this use:

cat server.crt server.key > server.includesprivatekey.pem

I would recommend naming files with "includesprivatekey" to help you manage the permissions you keep with this file.

No need to worry for incrementing/decrementing numbers using Javascript. Now HTML itself provides an easy way for it.

<input type="number" value="50">

It is that simple.The problem is that it works fine only in some browsers.Mozilla has not yet supported this feature.

Generators

An array of length 40 of 40 random possible values (0 - 39) without repeating values is better to shuffle it as @Phrogz and @Jared Beck explain. Another approach, just for the records, could be using generators. But this approach lacks of performance compared to other proposed solutions.

function* generateRandomIterable(n, range) {
  for (let i = 0; i < n; i++) {
    yield ~~(Math.random() * range);
  }
}
const randomArr = [...generateRandomIterable(40,40)];

the different log levels are helpful for tools, whose can anaylse you log files. Normally a logfile contains lots of information. To avoid an information overload (or here an stackoverflow^^) you can use the log levels for grouping the information.

This is happens because Jenkins is not aware about the shell path. In Manage Jenkins -> Configure System -> Shell, set the shell path as

• C:\Windows\system32\cmd.exe

I think what you want is:

abstract class Component {
  public deps: any = {};
  public props: any = {};

  public makePropSetter<T>(prop: string): (val: T) => T {
    return function(val) {
      this.props[prop] = val
      return val
    }
  }
}

class Post extends Component {
  public toggleBody: (val: boolean) => boolean;

  constructor () {
    super()
    this.toggleBody = this.makePropSetter<boolean>('showFullBody')
  }

  showMore (): boolean {
    return this.toggleBody(true)
  }

  showLess (): boolean {
    return this.toggleBody(false)
  }
}

The important change is in setProp (i.e., makePropSetter in the new code). What you're really doing there is to say: this is a function, which provided with a property name, will return a function which allows you to change that property.

The <T> on makePropSetter allows you to lock that function in to a specific type. The <boolean> in the subclass's constructor is actually optional. Since you're assigning to toggleBody, and that already has the type fully specified, the TS compiler will be able to work it out on its own.

Then, in your subclass, you call that function, and the return type is now properly understood to be a function with a specific signature. Naturally, you'll need to have toggleBody respect that same signature.

Changed function for deep casting (using recursion)

/**
 * Translates type
 * @param $destination Object destination
 * @param stdClass $source Source
 */
private static function Cast(&$destination, stdClass $source)
{
    $sourceReflection = new \ReflectionObject($source);
    $sourceProperties = $sourceReflection->getProperties();
    foreach ($sourceProperties as $sourceProperty) {
        $name = $sourceProperty->getName();
        if (gettype($destination->{$name}) == "object") {
            self::Cast($destination->{$name}, $source->$name);
        } else {
            $destination->{$name} = $source->$name;
        }
    }
}

CREATE TABLE `admnih` (
  `id` int(255) NOT NULL auto_increment,
  `asim` varchar(255) NOT NULL default '',
  `brid` varchar(255) NOT NULL default '',
  `rwtbah` int(1) NOT NULL default '0',
  `esmmwkeh` varchar(255) NOT NULL default '',
  `mrwr` varchar(255) NOT NULL default '',
  `tid` int(255) NOT NULL default '0',
  `alksmfialdlil` int(255) NOT NULL default '0',
  `tariktsjil` varchar(255) NOT NULL default '',
  `aimwke` varchar(255) NOT NULL default '',
  `twkie` text NOT NULL,
  `rwtbahkasah` int(255) NOT NULL default '0',
  PRIMARY KEY  (`id`)
) TYPE=MyISAM AUTO_INCREMENT=2 ;

As of Pandas 0.24.0, we can now use DataFrame.droplevel():

cols = pd.MultiIndex.from_tuples([("a", "b"), ("a", "c")])
df = pd.DataFrame([[1,2], [3,4]], columns=cols)

df.droplevel(0, axis=1) 

#   b  c
#0  1  2
#1  3  4

This is very useful if you want to keep your DataFrame method-chain rolling.

You can use CAST and CONVERT to switch between different types of encodings. See: http://dev.mysql.com/doc/refman/5.0/en/charset-convert.html

SELECT column1, CONVERT(column2 USING utf8)
FROM my_table 
WHERE my_condition;

Here's a version which pulls all digits from a string; i.e. given I'm 35 years old; I was born in 1982. The average family has 2.4 children. this would return 35198224. i.e. it's good where you've got numeric data which may have been formatted as a code (e.g. #123,456,789 / 123-00005), but isn't appropriate if you're looking to pull out specific numbers (i.e. as opposed to digits / just the numeric characters) from the text. Also it only handles digits; so won't return negative signs (-) or periods .).

declare @table table (id bigint not null identity (1,1), data nvarchar(max)) 
insert @table (data) 
values ('hello 123 its 45613 then') --outputs: 12345613
,('1 some other string 98 example 4') --outputs: 1984
,('AB ABCDE # 123') --outputs: 123 
,('ABCDE# 123') --outputs: 123
,('AB: ABC# 123') --outputs: 123
; with NonNumerics as (
    select id
    , data original
    --the below line replaces all digits with blanks
    , replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(data,'0',''),'1',''),'2',''),'3',''),'4',''),'5',''),'6',''),'7',''),'8',''),'9','') nonNumeric
    from @table
)
--each iteration of the below CTE removes another non-numeric character from the original string, putting the result into the numerics column
, Numerics as (
    select id
    , replace(original, substring(nonNumeric,1,1), '') numerics
    , replace(nonNumeric, substring(nonNumeric,1,1), '') charsToreplace
    , len(replace(nonNumeric, substring(nonNumeric,1,1), '')) charsRemaining
    from NonNumerics

    union all

    select id
    , replace(numerics, substring(charsToreplace,1,1), '') numerics
    , replace(charsToreplace, substring(charsToreplace,1,1), '') charsToreplace
    , len(replace(charsToreplace, substring(charsToreplace,1,1), '')) charsRemaining
    from Numerics
    where charsRemaining > 0
)
--we select only those strings with `charsRemaining=0`; i.e. the rows for which all non-numeric characters have been removed; there should be 1 row returned for every 1 row in the original data set.
select * from Numerics where charsRemaining = 0

This code works by removing all the digits (i.e. the characters we want) from a the given strings by replacing them with blanks. Then it goes through the original string (which includes the digits) removing all of the characters that were left (i.e. the non-numeric characters), thus leaving only the digits.

The reason we do this in 2 steps, rather than just removing all non-numeric characters in the first place is there are only 10 digits, whilst there are a huge number of possible characters; so replacing that small list is relatively fast; then gives us a list of those non-numeric characters which actually exist in the string, so we can then replace that small set.

The method makes use of recursive SQL, using common table expressions (CTEs).

The closest equivalent to Java's toString is to implement __str__ for your class. Put this in your class definition:

def __str__(self):
     return "foo"

You may also want to implement __repr__ to aid in debugging.

See here for more information:

• Special Method Names - Basic Customization

I noticed a lot of these answers, use this command:

use admin

which switches to the admin database. At least in Mongo v4.0.6, creating a user in the context of the admin database will create a user with "_id" : "admin.administrator":

> use admin
> db.getUsers()
[ ]
> db.createUser({ user: 'administrator', pwd: 'changeme', roles: [ { role: 'root', db: 'admin' }  ] })
> db.getUsers()
[
    {
        "_id" : "admin.administrator",
        "user" : "administrator",
        "db" : "admin",
        "roles" : [
            {
                "role" : "root",
                "db" : "admin"
            }
        ],
        "mechanisms" : [
            "SCRAM-SHA-1",
            "SCRAM-SHA-256"
        ]
    }
]

I emphasize "admin.administrator", for I have a Mongoid (mongodb ruby adapter) application with a different database than admin and I use the URI to reference the database in my mongoid.yml configuration:

development:
  clients:
    default:
      uri: <%= ENV['MONGODB_URI'] %>
      options:
        connect_timeout: 15
        retry_writes: false

This references the following environment variable:

export MONGODB_URI='mongodb://administrator:[email protected]/mysite_development?retryWrites=true&w=majority'

Notice the database is mysite_development, not admin. When I try to run the application, I get an error "User administrator (mechanism: scram256) is not authorized to access mysite_development".

So I return to the Mongo shell delete the user, switch to the specified database and recreate the user:

$ mongo
> db.dropUser('administrator')
> db.getUsers()
[]
> use mysite_development
> db.createUser({ user: 'administrator', pwd: 'changeme', roles: [ { role: 'root', db: 'admin' }  ] })
> db.getUsers()
[
    {
        "_id" : "mysite_development.administrator",
        "user" : "administrator",
        "db" : "mysite_development",
        "roles" : [
            {
                "role" : "root",
                "db" : "admin"
            }
        ],
        "mechanisms" : [
            "SCRAM-SHA-1",
            "SCRAM-SHA-256"
        ]
    }
]

Notice that the _id and db changed to reference the specific database my application depends on:

"_id" : "mysite_development.administrator",
"db" : "mysite_development",

After making this change, the error went away and I was able to connect to MongoDB fine inside my application.

Extra Notes:

In my example above, I deleted the user and recreated the user in the right database context. Had you already created the user in the right database context but given it the wrong roles, you could assign a mongodb built-in role to the user:

db.grantRolesToUser('administrator', [{ role: 'root', db: 'admin' }])

There is also a db.updateUser command, albiet typically used to update the user password.

If you want to start the batch for Win-Run / autostart, I found I nice solution here https://www.computerhope.com/issues/ch000932.htm & https://superuser.com/questions/364799/how-to-run-the-command-prompt-minimized

cmd.exe /c start /min myfile.bat ^& exit

• the cmd.exe is needed as start is no windows command that can be executed outside a batch
• /c = exit after the start is finished
• the ^& exit part ensures that the window closes even if the batch does not end with exit

However, the initial cmd is still not minimized.

Wipe data of AVD like that picture and run your program. it's work for me.

No, the size of a pointer may vary depending on the architecture. There are numerous exceptions.

In addition to Samaursa's excelent answer, you can use the evolve extension's prune as a safe and recoverable version of strip that will allow you to go back in case you do anything wrong.

I have these alias on my .hgrc:

 # Prunes all draft changesets on the current repository
 reset-tree = prune -r "outgoing() and not obsolete()"
 # *STRIPS* all draft changesets on current repository. This deletes history.
 force-reset-tree = strip 'roots(outgoing())'

Note that prune also has --keep, just like strip, to keep the working directory intact allowing you to recommit the files.

This is still relevant in 2018.

To String

import strings
stringFiles := strings.Join(fileSlice[:], ",")

Back to Slice again

import strings
fileSlice := strings.Split(stringFiles, ",")

I don't have enough reputation to comment on any answer. In one of the comments, someone has asked how to ignore the hidden folders in the list. Below is how you can do this.

dir /b /AD-H

I use a JSON file in the package dir. This fits Zooko's requirements.

Inside pkg_dir/pkg_info.json:

{"version": "0.1.0"}

Inside setup.py:

from distutils.core import setup
import json

with open('pkg_dir/pkg_info.json') as fp:
    _info = json.load(fp)

setup(
    version=_info['version'],
    ...
    )

Inside pkg_dir/__init__.py:

import json
from os.path import dirname

with open(dirname(__file__) + '/pkg_info.json') as fp:
    _info = json.load(fp)

__version__ = _info['version']

I also put other information in pkg_info.json, like author. I like to use JSON because I can automate management of metadata.

This is how I solved the problem The menu closes a few seconds after mouse out (that if hover didn't fire),

//Set timer switch
$setM_swith=0;

$(function(){
    $(".navbar-nav li a").click(function(event) {
        if (!$(this).parent().hasClass('dropdown'))
            $(".navbar-collapse").collapse('hide');
    });
    $(".navbar-collapse").mouseleave(function(){
        $setM_swith=1;
        setTimeout(function(){ 
           if($setM_swith==1) {
             $(".navbar-collapse").collapse('hide');
             $setM_swith=0;} 
        }, 3000);
    });
    $(".navbar-collapse").mouseover(function() {
        $setM_swith=0;
    });
 });

The simple method is to use :

sdiff A1 A2

Another method is to use comm, as you can see in Comparing two unsorted lists in linux, listing the unique in the second file

I found around this script, it may be interesting :)

 IFS=$'\n';for f in `find .`; do file=$(echo $f | tr [:blank:] '_'); [ -e $f ] && [ ! -e $file ] && mv "$f" $file;done;unset IFS

Also if you're making it a console program, you can do: print(" ") and continue your program. I've found it the easiest way to separate my text.

I got similar error when i run legacy application in Visual studio 2013 iis express and solved the issue by following steps 1.Navigate to "Documents\IISExpress\config" 2.Open "applicationhost.config" using notepad or any preferred editor 3.scroll down and find for section name="anonymousAuthentication" under 4. Update overrideModeDefault="Deny" to "Allow" 5. save the config file 6. Run the legacy application and worked fine for me.

r+ is the canonical mode for reading and writing at the same time. This is not different from using the fopen() system call since file() / open() is just a tiny wrapper around this operating system call.

You can use an indeterminate state: http://css-tricks.com/indeterminate-checkboxes/. It's supported by the browsers out of the box and don't require any external js libraries.

The Dockerfile for the official mongo image is here. The default command is mongod but you can override to add the --auth switch assuming user's are already configured.

docker run -d .... mongodb:latest mongod --auth

If the user has to be created then you need to volume mount a startup script into /entrypoint.sh to replace the default startup script and then have that script create users and start mongo with the auth switch.

docker run -d .... -v $PWD/my_custom_script.sh:/entrypoint.sh mongodb:latest

If, like me, you can't find a datetime under date or time in the format dialog, you should be able to find it in 'Custom'.

I just selected 'dd/mm/yyyy hh:mm' from 'Custom' and am happy with the results.

Ryan P's answer should be changed to:

    jQuery.fn.toggleOption = function (show) {
        $(this).toggle(show);
        if (show) {
            if ($(this).parent('span.toggleOption').length)
                $(this).unwrap();
        } else {
            **if ($(this).parent('span.toggleOption').length==0)**
                $(this).wrap('<span class="toggleOption" style="display: none;" />');
        }
    };

Otherwise it gets wrapped in too many tags

In Netbeans please delete current you create the jar file and on the project explore of Netbeans please clean and build 2 or 3 times and right the project folder in project explore and build the jar file.

I tweaked @markrushakoff's answer to make it a callable function:

function yesNo {
  # Prompts user with $1, returns true if response starts with y or Y or is empty string
  read -e -p "
$1 [Y/n] " YN

  [[ "$YN" == y* || "$YN" == Y* || "$YN" == "" ]]
}

Use it like this:

$ if yesNo "asfd"; then echo "true"; else echo "false"; fi

asfd [Y/n] y
true

$ if yesNo "asfd"; then echo "true"; else echo "false"; fi

asfd [Y/n] Y
true

$ if yesNo "asfd"; then echo "true"; else echo "false"; fi

asfd [Y/n] yes
true

$ if yesNo "asfd"; then echo "true"; else echo "false"; fi

asfd [Y/n]
true

$ if yesNo "asfd"; then echo "true"; else echo "false"; fi

asfd [Y/n] n
false

$ if yesNo "asfd"; then echo "true"; else echo "false"; fi

asfd [Y/n] ddddd
false

Here is a more complex version that provides for a specified default value:

function toLowerCase {
  echo "$1" | tr '[:upper:]' '[:lower:]'
}

function yesNo {
  # $1: user prompt
  # $2: default value (assumed to be Y if not specified)
  # Prompts user with $1, using default value of $2, returns true if response starts with y or Y or is empty string

  local DEFAULT=yes
  if [ "$2" ]; then local DEFAULT="$( toLowerCase "$2" )"; fi
  if [[ "$DEFAULT" == y* ]]; then
    local PROMPT="[Y/n]"
  else
    local PROMPT="[y/N]"
  fi
  read -e -p "
$1 $PROMPT " YN

  YN="$( toLowerCase "$YN" )"
  { [ "$YN" == "" ] && [[ "$PROMPT" = *Y* ]]; } || [[ "$YN" = y* ]]
}

Use it like this:

$ if yesNo "asfd" n; then echo "true"; else echo "false"; fi

asfd [y/N]
false

$ if yesNo "asfd" n; then echo "true"; else echo "false"; fi

asfd [y/N] y
true

$ if yesNo "asfd" y; then echo "true"; else echo "false"; fi

asfd [Y/n] n
false

There will not be any harm deleting the forked repositories. You can again fork that. It won't change the original code. The flow is like this...

1) You fork a repository. Just think of this as another copy of code which you can access or make changes to. The url of this repository will be of the form https://github.com/your-user-name/original-repo.

2) You make some changes to that in your local machine and push them. Now the copy you created will be updated, but not the original one from which you have forked your repo.

3) If you want the changes you added to your forked repo to be applied to original repo(this may be helpful to the people who are organizing the repo) then you have to create a pull request which you can do through UI. Then if they like your contribution, they will merge that with their code.

Generally this is what open source organizations do.

There is a library called PhoneNumberUtils that can help you to cope with phone number conversions and comparisons. For instance, use ...

EditText text = (EditText) findViewById(R.id.editTextId);
PhoneNumberUtils.formatNumber(text.getText().toString())

... to format your number in a standard format.

PhoneNumberUtils.compare(String a, String b);

... helps with fuzzy comparisons. There are lots more. Check out http://developer.android.com/reference/android/telephony/PhoneNumberUtils.html for more.

p.s. setting the the EditText to phone is already a good choice; eventually it might be helpful to add digits e.g. in your layout it looks as ...

<EditText
    android:id="@+id/editTextId"
    android:inputType="phone"
    android:digits="0123456789+" 
/> 

In:

for i in range(c/10):

You're creating a float as a result - to fix this use the int division operator:

for i in range(c // 10):

fs.exists has been deprecated since 1.0.0. You can use fs.stat instead of that.

var fs = require('fs');
fs.stat(path, (err, stats) => {
if ( !stats.isFile(filename) ) { // do this 
}  
else { // do this 
}});

Here is the link for the documentation fs.stats

The login with Facebook button on your site is linking to:

https://www.facebook.com/v2.2/dialog/oauth?client_id=1500708243571026&redirect_uri=http://openstrategynetwork.com/_oauth/facebook&display=popup&scope=email&state=eyJsb2dpblN0eWxlIjoicG9wdXAiLCJjcmVkZW50aWFsVG9rZW4iOiIwSXhEU05XamJjU0VaQWdqcmF6SXdOUWRuRFozXzc0X19lbVhGWUJTZGNYIiwiaXNDb3Jkb3ZhIjpmYWxzZX0=

Notice: redirect_uri=http://openstrategynetwork.com/_oauth/facebook

If you instead change the link to:

redirect_uri=http://openstrategynetwork.com/_oauth/facebook?close

It should work. Or, you can change the Facebook link to http://openstrategynetwork.com/_oauth/facebook

You can also add http://localhost/_oauth/facebook to the valid redirect URIs.

Facebook requires that you whitelist redirect URIs, since otherwise people could login with Facebook for your service, and then send their access token to an attacker's server! And you don't want that to happen ;]

You need to create a Handler in the UI thread and then use it to post or send a message from your other thread to update the UI

I had the same problem when parsing html to string. Removing the last <p></p> (and replacing it with an alternative if desirable, like < /br>) solved it for me.

Using parse_str().

$str = 'pg_id=2&parent_id=2&document&video';
parse_str($str, $arr);
print_r($arr);

From Oracle 12c R2 you could use COLLATE operator:

The COLLATE operator determines the collation for an expression. This operator enables you to override the collation that the database would have derived for the expression using standard collation derivation rules.

The COLLATE operator takes one argument, collation_name, for which you can specify a named collation or pseudo-collation. If the collation name contains a space, then you must enclose the name in double quotation marks.

Demo:

CREATE TABLE tab1(i INT PRIMARY KEY, name VARCHAR2(100));

INSERT INTO tab1(i, name) VALUES (1, 'John');
INSERT INTO tab1(i, name) VALUES (2, 'Joe');
INSERT INTO tab1(i, name) VALUES (3, 'Billy'); 
--========================================================================--
SELECT /*csv*/ *
FROM tab1
WHERE name = 'jOHN' ;
-- no rows selected

SELECT /*csv*/ *
FROM tab1
WHERE name COLLATE BINARY_CI = 'jOHN' ;
/*
"I","NAME"
1,"John"
*/

SELECT /*csv*/ *
FROM tab1 
WHERE name LIKE 'j%';
-- no rows selected

SELECT /*csv*/ *
FROM tab1 
WHERE name COLLATE BINARY_CI LIKE 'j%';
/*
"I","NAME"
1,"John"
2,"Joe"
*/

db<>fiddle demo

1. First, you need to display/check all running queries using below query-

   SELECT text, GETDATE(), *
   FROM sys.dm_exec_requests
   CROSS APPLY sys.dm_exec_sql_text(sql_handle)
   

2. Find Session-Id and Description for respective all running queries and then copy specific query's Session-Id which you want to kill/stop immediately.

3. Kill/stop specific query using Session-Id using this query:

   Kill Session-id
   

   Example:

   kill 125 --125 is my Session-Id
   

"Requery" is indeed what you what you want to run, but you could do that in Form A's "On Got Focus" event. If you have code in your Form_Load, perhaps you can move it to Form_Got_Focus.

find already looks recursively by default:

[15:21:53 ~]$ mkdir foo
[15:22:28 ~]$ cd foo
[15:22:31 ~/foo]$ mkdir bar
[15:22:35 ~/foo]$ cd bar
[15:22:36 ~/foo/bar]$ ln -s ../foo abc
[15:22:40 ~/foo/bar]$ cd ..
[15:22:47 ~/foo]$ ln -s foo abc
[15:22:52 ~/foo]$ find ./ -type l
.//abc
.//bar/abc
[15:22:57 ~/foo]$ 

For anyone using PDO, the solution is similar to ntd's answer.

From the PHP PDO::__construct page, as a comment from the user Kiipa at live dot com:

To get UTF-8 charset you can specify that in the DSN.

$link = new PDO("mysql:host=localhost;dbname=DB;charset=UTF8");

In Java 8, use Map.getOrDefault. It takes the key, and the value to return if no matching key is found.

Open the SVG with you text editor. If you have some luck the file will contain something like:

<path d="M52.52,26.064c-1.612,0-3.149,0.336-4.544,0.939L43.179,15.89c-0.122-0.283-0.337-0.484-0.58-0.637  c-0.212-0.147-0.459-0.252-0.738-0.252h-8.897c-0.743,0-1.347,0.603-1.347,1.347c0,0.742,0.604,1.345,1.347,1.345h6.823  c0.331,0.018,1.022,0.139,1.319,0.825l0.54,1.247l0,0L41.747,20c0.099,0.291,0.139,0.749-0.604,0.749H22.428  c-0.857,0-1.262-0.451-1.434-0.732l-0.11-0.221v-0.003l-0.552-1.092c0,0,0,0,0-0.001l-0.006-0.011l-0.101-0.2l-0.012-0.002  l-0.225-0.405c-0.049-0.128-0.031-0.337,0.65-0.337h2.601c0,0,1.528,0.127,1.57-1.274c0.021-0.722-0.487-1.464-1.166-1.464  c-0.68,0-9.149,0-9.149,0s-1.464-0.17-1.549,1.369c0,0.688,0.571,1.369,1.379,1.369c0.295,0,0.7-0.003,1.091-0.007  c0.512,0.014,1.389,0.121,1.677,0.679l0,0l0.117,0.219c0.287,0.564,0.751,1.473,1.313,2.574c0.04,0.078,0.083,0.166,0.126,0.246  c0.107,0.285,0.188,0.807-0.208,1.483l-2.403,4.082c-1.397-0.606-2.937-0.947-4.559-0.947c-6.329,0-11.463,5.131-11.463,11.462  S5.15,48.999,11.479,48.999c5.565,0,10.201-3.968,11.243-9.227l5.767,0.478c0.235,0.02,0.453-0.04,0.654-0.127  c0.254-0.043,0.507-0.128,0.713-0.311l13.976-12.276c0.192-0.164,0.874-0.679,1.151-0.039l0.446,1.035  c-2.659,2.099-4.372,5.343-4.372,8.995c0,6.329,5.131,11.461,11.462,11.461c6.329,0,11.464-5.132,11.464-11.461  C63.983,31.196,58.849,26.064,52.52,26.064z M11.479,46.756c-4.893,0-8.861-3.968-8.861-8.861s3.969-8.859,8.861-8.859  c1.073,0,2.098,0.201,3.051,0.551l-4.178,7.098c-0.119,0.202-0.167,0.418-0.183,0.633c-0.003,0.022-0.015,0.036-0.016,0.054  c-0.007,0.091,0.02,0.172,0.03,0.258c0.008,0.054,0.004,0.105,0.018,0.158c0.132,0.559,0.592,1,1.193,1.05l8.782,0.727  C19.397,43.655,15.802,46.756,11.479,46.756z M15.169,36.423c-0.003-0.002-0.003-0.002-0.006-0.002  c-1.326-0.109-0.482-1.621-0.436-1.704l2.224-3.78c1.801,1.418,3.037,3.515,3.32,5.908L15.169,36.423z M25.607,37.285l-2.688-0.223  c-0.144-3.521-1.87-6.626-4.493-8.629l1.085-1.842c0.938-1.593,1.756,0.001,1.756,0.001l0,0c1.772,3.48,3.65,7.169,4.745,9.331  C26.012,35.924,26.746,37.379,25.607,37.285z M43.249,24.273L30.78,35.225c0,0.002,0,0.002,0,0.002  c-1.464,1.285-2.177-0.104-2.188-0.127l-5.297-10.517l0,0c-0.471-0.936,0.41-1.062,0.805-1.073h17.926c0,0,1.232-0.012,1.354,0.267  v0.002C43.458,23.961,43.473,24.077,43.249,24.273z M52.52,46.745c-4.891,0-8.86-3.968-8.86-8.858c0-2.625,1.146-4.976,2.962-6.599  l2.232,5.174c0.421,0.977,0.871,1.061,0.978,1.065h0.023h1.674c0.9,0,0.592-0.913,0.473-1.199l-2.862-6.631  c1.043-0.43,2.184-0.672,3.381-0.672c4.891,0,8.861,3.967,8.861,8.861C61.381,42.777,57.41,46.745,52.52,46.745z" fill="#241F20"/>

The d attribute is what you are looking for.

Make sure that you actually save the file as UTF-8, alternatively use HTML entities (&#nnn;) for the special characters.

Python really tries hard to intelligently set sys.path. How it is set can get really complicated. The following guide is a watered-down, somewhat-incomplete, somewhat-wrong, but hopefully-useful guide for the rank-and-file python programmer of what happens when python figures out what to use as the initial values of sys.path, sys.executable, sys.exec_prefix, and sys.prefix on a normal python installation.

First, python does its level best to figure out its actual physical location on the filesystem based on what the operating system tells it. If the OS just says "python" is running, it finds itself in $PATH. It resolves any symbolic links. Once it has done this, the path of the executable that it finds is used as the value for sys.executable, no ifs, ands, or buts.

Next, it determines the initial values for sys.exec_prefix and sys.prefix.

If there is a file called pyvenv.cfg in the same directory as sys.executable or one directory up, python looks at it. Different OSes do different things with this file.

One of the values in this config file that python looks for is the configuration option home = <DIRECTORY>. Python will use this directory instead of the directory containing sys.executable when it dynamically sets the initial value of sys.prefix later. If the applocal = true setting appears in the pyvenv.cfg file on Windows, but not the home = <DIRECTORY> setting, then sys.prefix will be set to the directory containing sys.executable.

Next, the PYTHONHOME environment variable is examined. On Linux and Mac, sys.prefix and sys.exec_prefix are set to the PYTHONHOME environment variable, if it exists, superseding any home = <DIRECTORY> setting in pyvenv.cfg. On Windows, sys.prefix and sys.exec_prefix is set to the PYTHONHOME environment variable, if it exists, unless a home = <DIRECTORY> setting is present in pyvenv.cfg, which is used instead.

Otherwise, these sys.prefix and sys.exec_prefix are found by walking backwards from the location of sys.executable, or the home directory given by pyvenv.cfg if any.

If the file lib/python<version>/dyn-load is found in that directory or any of its parent directories, that directory is set to be to be sys.exec_prefix on Linux or Mac. If the file lib/python<version>/os.py is is found in the directory or any of its subdirectories, that directory is set to be sys.prefix on Linux, Mac, and Windows, with sys.exec_prefix set to the same value as sys.prefix on Windows. This entire step is skipped on Windows if applocal = true is set. Either the directory of sys.executable is used or, if home is set in pyvenv.cfg, that is used instead for the initial value of sys.prefix.

If it can't find these "landmark" files or sys.prefix hasn't been found yet, then python sets sys.prefix to a "fallback" value. Linux and Mac, for example, use pre-compiled defaults as the values of sys.prefix and sys.exec_prefix. Windows waits until sys.path is fully figured out to set a fallback value for sys.prefix.

Then, (what you've all been waiting for,) python determines the initial values that are to be contained in sys.path.

1. The directory of the script which python is executing is added to sys.path. On Windows, this is always the empty string, which tells python to use the full path where the script is located instead.
2. The contents of PYTHONPATH environment variable, if set, is added to sys.path, unless you're on Windows and applocal is set to true in pyvenv.cfg.
3. The zip file path, which is <prefix>/lib/python35.zip on Linux/Mac and os.path.join(os.dirname(sys.executable), "python.zip") on Windows, is added to sys.path.
4. If on Windows and no applocal = true was set in pyvenv.cfg, then the contents of the subkeys of the registry key HK_CURRENT_USER\Software\Python\PythonCore\<DLLVersion>\PythonPath\ are added, if any.
5. If on Windows and no applocal = true was set in pyvenv.cfg, and sys.prefix could not be found, then the core contents of the of the registry key HK_CURRENT_USER\Software\Python\PythonCore\<DLLVersion>\PythonPath\ is added, if it exists;
6. If on Windows and no applocal = true was set in pyvenv.cfg, then the contents of the subkeys of the registry key HK_LOCAL_MACHINE\Software\Python\PythonCore\<DLLVersion>\PythonPath\ are added, if any.
7. If on Windows and no applocal = true was set in pyvenv.cfg, and sys.prefix could not be found, then the core contents of the of the registry key HK_CURRENT_USER\Software\Python\PythonCore\<DLLVersion>\PythonPath\ is added, if it exists;
8. If on Windows, and PYTHONPATH was not set, the prefix was not found, and no registry keys were present, then the relative compile-time value of PYTHONPATH is added; otherwise, this step is ignored.
9. Paths in the compile-time macro PYTHONPATH are added relative to the dynamically-found sys.prefix.
10. On Mac and Linux, the value of sys.exec_prefix is added. On Windows, the directory which was used (or would have been used) to search dynamically for sys.prefix is added.

At this stage on Windows, if no prefix was found, then python will try to determine it by searching all the directories in sys.path for the landmark files, as it tried to do with the directory of sys.executable previously, until it finds something. If it doesn't, sys.prefix is left blank.

Finally, after all this, Python loads the site module, which adds stuff yet further to sys.path:

It starts by constructing up to four directories from a head and a tail part. For the head part, it uses sys.prefix and sys.exec_prefix; empty heads are skipped. For the tail part, it uses the empty string and then lib/site-packages (on Windows) or lib/pythonX.Y/site-packages and then lib/site-python (on Unix and Macintosh). For each of the distinct head-tail combinations, it sees if it refers to an existing directory, and if so, adds it to sys.path and also inspects the newly added path for configuration files.

Unicode escapes only work in unicode strings, so this

 a="\u2026"

is actually a string of 6 characters: '\', 'u', '2', '0', '2', '6'.

To make unicode out of this, use decode('unicode-escape'):

a="\u2026"
print repr(a)
print repr(a.decode('unicode-escape'))

## '\\u2026'
## u'\u2026'

I think the general consensus is that nlog is a bit easier to configure and use. Both are quite capable, though.

Real world example: I've got a log function that can be called with an arbitrary number of parameters: log("foo is {} and bar is {}", param1, param2). If a DEBUG flag is set to true, the brackets get replaced by the given parameters and the string is passed to console.log(msg). Parameters can and will be Strings, Numbers and whatever may be returned by JSON / AJAX calls, maybe even null.

• arguments[i].toString() is not an option, because of possible null values (see Connell Watkins answer)
• JSLint will complain about arguments[i] + "". This may or may not influence a decision on what to use. Some folks strictly adhere to JSLint.
• In some browsers, concatenating empty strings is a little faster than using string function or string constructor (see JSPerf test in Sammys S. answer). In Opera 12 and Firefox 19, concatenating empty strings is rediculously faster (95% in Firefox 19) - or at least JSPerf says so.

Here's my solution using URL and try with resources phrase to catch the exceptions.

/**
 * Created by mona on 5/27/16.
 */
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
public class ReadFromWeb {
    public static void readFromWeb(String webURL) throws IOException {
        URL url = new URL(webURL);
        InputStream is =  url.openStream();
        try( BufferedReader br = new BufferedReader(new InputStreamReader(is))) {
            String line;
            while ((line = br.readLine()) != null) {
                System.out.println(line);
            }
        }
        catch (MalformedURLException e) {
            e.printStackTrace();
            throw new MalformedURLException("URL is malformed!!");
        }
        catch (IOException e) {
            e.printStackTrace();
            throw new IOException();
        }

    }
    public static void main(String[] args) throws IOException {
        String url = "https://madison.craigslist.org/search/sub";
        readFromWeb(url);
    }

}

You could additionally save it to file based on your needs or parse it using XML or HTML libraries.

There's no general way to tell if a file is encoded with a specific encoding. Remember that an encoding is nothing more but an "agreement" how the bits in a file should be mapped to characters.

If you don't know which of your files are actually already encoded in UTF-8 and which ones are encoded in windows-1252, you will have to inspect all files and find out yourself. In the worst case that could mean that you have to open every single one of them with either of the two encodings and see whether they "look" correct -- i.e., all characters are displayed correctly. Of course, you may use tool support in order to do that, for instance, if you know for sure that certain characters are contained in the files that have a different mapping in windows-1252 vs. UTF-8, you could grep for them after running the files through 'iconv' as mentioned by Seva Akekseyev.

Another lucky case for you would be, if you know that the files actually contain only characters that are encoded identically in both UTF-8 and windows-1252. In that case, of course, you're done already.

Forgot to put the variable in the sql statement without quotations.

 $update_query = 
      "UPDATE db.tablename SET insert_time=NOW() WHERE username='" .$somename."'";

In Bootstrap 4, if you compile SASS by yourself, you can change the following variables to control the styling of the focus shadow:

$input-btn-focus-width:       .2rem !default;
$input-btn-focus-color:       rgba($component-active-bg, .25) !default;
$input-btn-focus-box-shadow:  0 0 0 $input-btn-focus-width $input-btn-focus-color !default;

Note: as of Bootstrap 4.1, the $input-btn-focus-color and $input-btn-focus-box-shadow variables are used only for input elements, but not for buttons. The focus shadow for buttons is hardcoded as box-shadow: 0 0 0 $btn-focus-width rgba($border, .5);, so you can only control the shadow width via the $input-btn-focus-width variable.

summation and your other functions are defined after they're used in main, and so the compiler has made a guess about it's signature; in other words, an implicit declaration has been assumed.

You should declare the function before it's used and get rid of the warning. In the C99 specification, this is an error.

Either move the function bodies before main, or include method signatures before main, e.g.:

#include <stdio.h>

int summation(int *, int *, int *);

int main()
{
    // ...

To support the answers given above, The details of the redis instance can be obtained by

$ redis-cli
$ INFO

This gives all the info you may need

# Server
redis_version:5.0.5
redis_git_sha1:00000000
redis_git_dirty:0
redis_build_id:da75abdfe06a50f8
redis_mode:standalone
os:Linux 5.3.0-51-generic x86_64
arch_bits:64
multiplexing_api:epoll
atomicvar_api:atomic-builtin
gcc_version:7.5.0
process_id:14126
run_id:adfaeec5683d7381a2a175a2111f6159b6342830
tcp_port:6379
uptime_in_seconds:16860
uptime_in_days:0
hz:10
configured_hz:10
lru_clock:15766886
executable:/tmp/redis-5.0.5/src/redis-server
config_file:

# Clients
connected_clients:22
....More Verbose

The version lies in the second line :)

Use the -J compression option for xz. And remember to man tar :)

tar cfJ <archive.tar.xz> <files>

Edit 2015-08-10:

If you're passing the arguments to tar with dashes (ex: tar -cf as opposed to tar cf), then the -f option must come last, since it specifies the filename (thanks to @A-B-B for pointing that out!). In that case, the command looks like:

tar -cJf <archive.tar.xz> <files>

Make sure that you have the correct layout, and that the RecyclerView id is inside the layout. Otherwise, you will be getting this error. I had the same problem, then I noticed the layout was wrong.

    public class ColorsFragment extends Fragment {

         public ColorsFragment() {}

         @Override
         public View onCreateView(LayoutInflater inflater, ViewGroup container,
             Bundle savedInstanceState) {

==> make sure you are getting the correct layout here. R.layout...

             View rootView = inflater.inflate(R.layout.fragment_colors, container, false); 

The simplest way of installing SBT on ubuntu is the deb package provided by Typesafe.

Run the following shell commands:

1. wget http://apt.typesafe.com/repo-deb-build-0002.deb
2. sudo dpkg -i repo-deb-build-0002.deb
3. sudo apt-get update
4. sudo apt-get install sbt

And you're done !

Brendan is correct. You can edit the Select command to edit a filtered list of records. For instance "WHERE dept_no = 200".

I suggest merging develop and master with that command

git checkout master

git merge --commit --no-ff --no-edit develop

For more information, check https://git-scm.com/docs/git-merge

You can use just:

Declare @pass2 binary(32)
Set @pass2 =0x4D006A00450034004E0071006B00350000000000000000000000000000000000
SELECT CONVERT(NVARCHAR(16), @pass2)

then after encoding you'll receive text 'MjE4Nqk5'

Using @Modifying and @Transaction fixed me

1. @Modifying @Query(value="DELETE FROM lock WHERE user_id = ?1" ,nativeQuery=true) void deleteByUserId(Long userId);

2. @Service @Transactional

You can convert char to int and viceversa easily because for the machine an int and a char are the same, 8 bits, the only difference comes when they have to be shown in screen, if the number is 65 and is saved as a char, then it will show 'A', if it's saved as a int it will show 65.

With other types things change, because they are stored differently in memory. There's standard function in C that allows you to convert from string to double easily, it's atof. (You need to include stdlib.h)

#include <stdlib.h>

int main()
{
    string word;  
    openfile >> word;
    double lol = atof(word.c_str()); /*c_str is needed to convert string to const char*
                                     previously (the function requires it)*/
    return 0;
}

The transform method signature changed somewhere in an RC of Angular 2. Try something more like this:

export class FilterPipe implements PipeTransform {
    transform(items: any[], filterBy: string): any {
        return items.filter(item => item.id.indexOf(filterBy) !== -1);
    }
}

And if you want to handle nulls and make the filter case insensitive, you may want to do something more like the one I have here:

export class ProductFilterPipe implements PipeTransform {

    transform(value: IProduct[], filterBy: string): IProduct[] {
        filterBy = filterBy ? filterBy.toLocaleLowerCase() : null;
        return filterBy ? value.filter((product: IProduct) =>
            product.productName.toLocaleLowerCase().indexOf(filterBy) !== -1) : value;
    }
}

And NOTE: Sorting and filtering in pipes is a big issue with performance and they are NOT recommended. See the docs here for more info: https://angular.io/guide/pipes#appendix-no-filterpipe-or-orderbypipe

I had exactly the same issue last week - WCF program behaves strangely on one server - why?

For me the solution was rather simple. Sharepoint has its own set of permissions. My client tried to log on as a user that wasn't explicitly given access to the webservice through Sharepoint's administration panel.

I added the user to Sharepoint's whitelist and bang - it just worked.

Even if that isn't the issue, please note that

The HTTP request is unauthorized with client authentication scheme ‘Ntlm’. The authentication header received from the server was ‘NTLM’.

Means (in English) that you simply don't have permission. Your protocol is probably right - your user just doesn't have permissions.

The \ on it's own is used to escape special characters, such as \n (new line), \t (tabulation), \" (quotes) when typing these specific values in a System.out.println() statement.

Thus, if you want to print a backslash, \, you can't have it on it's own since the compiler will be expecting a special character (such as the ones above). Thus, to print a backslash you need to escape it, since itself is also one of these special characters, thus, \\ yields \.

I'm not sure if you'd say this is a Windows Vista/7 oddity or a .Net oddity but it had me scratching my head for a while.

string filename = @"c:\program files\my folder\test.txt";
System.IO.File.WriteAllText(filename, "Hello world.");
bool exists = System.IO.File.Exists(filename); // returns true;
string text = System.IO.File.ReadAllText(filename); // Returns "Hello world."

In Windows Vista/7 the file will actually be written to C:\Users\<username>\Virtual Store\Program Files\my folder\test.txt

you just setting at php.ini

then set :

upload_max_filesize = 1000M;
post_max_size = 1000M;

then restart your xampp.. Check the image

I had a large enumerated type I wanted to convert it into an NSDictionary lookup. I ended up using sed from OSX terminal as:

$ sed -E 's/^[[:space:]]{1,}([[:alnum:]]{1,}).*$/  @(\1) : @"\1",/g' ObservationType.h

which can be read as: 'capture the first word on the line and output @(word) : @"word",'

This regex converts the enum in a header file named 'ObservationType.h' which contains:

typedef enum : int { 
    ObservationTypePulse = 1,
    ObservationTypeRespRate = 2,
    ObservationTypeTemperature = 3,
    .
    .
}

into something like:

    @(ObservationTypePulse) : @"ObservationTypePulse",
    @(ObservationTypeRespRate) : @"ObservationTypeRespRate",
    @(ObservationTypeTemperature) : @"ObservationTypeTemperature",
    .
    .

which can then be wrapped in a method using modern objective-c syntax @{ } (as explained by @yar1vn above) to create a NSDictionary lookup :

-(NSDictionary *)observationDictionary
{
    static NSDictionary *observationDictionary;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        observationDictionary = [[NSDictionary alloc] initWithDictionary:@{
                                 @(ObservationTypePulse) : @"ObservationTypePulse",
                                 @(ObservationTypeRespRate) : @"ObservationTypeRespRate",
                                 .
                                 .
                                 }];
    });
    return observationDictionary;
}

The dispatch_once boiler-plate is just to ensure that the static variable is initialised in a thread-safe manner.

Note: I found the sed regex expression on OSX odd - when I tried to use + to match 'one or more' it didn't work and had to resort to using {1,} as a replacement

TYPE variable = jsonbody["key"]?.Value<TYPE>() ?? DEFAULT_VALUE;

e.g.

bool attachMap = jsonbody["map"]?.Value<bool>() ?? false;

public enum EXIT_CODE {
    A(104), B(203);

    private int numVal;

    EXIT_CODE(int numVal) {
        this.numVal = numVal;
    }

    public int getNumVal() {
        return numVal;
    }
}

pixels = np.array(pixels) in this line you reassign pixels. So, it may not a list anyhow. Though pixels is not a list it has no attributes append. Does it make sense?

Do not use more than one style attribute. Just seperate styles in the style attribute with ; It is a block of inline CSS, so think of this as you would do CSS in a separate stylesheet.

So in this case its: style="height:100px;width:100px;"

You can use this for any CSS style, so if you wanted to change the colour of the text to white: style="height:100px;width:100px;color:#ffffff" and so on.

However, it is worth using inline CSS sparingly, as it can make code less manageable in future. Using an external stylesheet may be a better option for this. It depends really on your requirements. Inline CSS does make for quicker coding.

This always cheers me up:

:help 42

Use \Q to autoescape any potentially problematic characters in your variable.

if($text_to_search =~ m/\Q$search_string/) print "wee";

I can't guarantee that this will work for every new iPad Pro which will be released but this works pretty well as of 2019:

@media only screen and (min-width: 1024px) and (max-height: 1366px)
    and (-webkit-min-device-pixel-ratio: 1.5) and (hover: none) {
    /* ... */
}

I determined that this problem was a corrupt connection manager by identifying the specific connection that was failing. I'm working in SQL Server 2016 and I have created the SSISDB catalog and I am deploying my projects there.

Here's the short answer. Delete the connection manager and then re-create it with the same name. Make sure the packages using that connection are still wired up correctly and you should be good to go. If you're not sure how to do that, I've included the detailed procedure below.

To identify the corrupt connection, I did the following. In SSMS, I opened the Integration Services Catalogs folder, then the SSISDB folder, then the folder for my solution, and on down until I found my list of packages for that project.

By right clicking the package that failed, going to reports>standard reports>all executions, selecting the last execution, and viewing the "All Messages" report I was able to isolate which connection was failing. In my case, the connection manager to my destination. I simply deleted the connection manager and then recreated a new connection manager with the same name.

Subsequently, I went into my package, opened the data flow, found that some of my destinations had lit up with the red X. I opened the destination, re-selected the correct connection name, re-selected the target table, and checked the mappings were still correct. I had six destinations and only three had the red X but I clicked all of them and made sure they were still configured correctly.

I was on Samsung S8 and had same problem too. After I installed Samsung Kies, issues was resolved for me, as I believe it had updated the correct driver required for my Samsung S8.

As now to day CKEditor 4+ launched we have to use it.ekeditor 4 setData documentation

CKEDITOR.instances['editor1'].setData(value);

Where editor1 is textarea Id.

Old methods such as insertHtml('html data') and insertText('text data') also works fine.

and to get data use

var ckdata =  CKEDITOR.instances['editor1'].getData();
var data = CKEDITOR.instances.editor1.getData();

Ckedtor 4 documentation

Maybe you could use a function if you want to declare the number of levels and put it into a function?

private String GetParents(Int32 noOfLevels, String currentpath)
{
     String path = "";
     for(int i=0; i< noOfLevels; i++)
     {
         path += @"..\";
     }
     path += currentpath;
     return path;
}

And you could call it like this:

String path = this.GetParents(4, currentpath);

As you are using C++, the obligatory suggestion that's still missing here, is to use std::vector<double>.

You can easily pass it by reference:

void foo(std::vector<double>& bar) {}

And if you have C++11 support, also have a look at std::array.

For reference:

• http://de.cppreference.com/w/cpp/container/vector
• http://de.cppreference.com/w/cpp/container/array

Unfortunately while I thought these answers may have worked for me, I struggled with a solution, as I'm using tables inside responsive tables - where the overflow-x is played with.

So, with that in mind, have a look at this link for a cleaner way, which doesn't have the weird width overflow issues. It worked for me in the end and was very easy to implement.

https://css-tricks.com/rotated-table-column-headers/

A lot of these answers won't actually work, having tried them myself. Give this a go:

string filepath = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
DirectoryInfo d = new DirectoryInfo(filepath);

foreach (var file in d.GetFiles("*.txt"))
{
      Directory.Move(file.FullName, filepath + "\\TextFiles\\" + file.Name);
}

It will move all .txt files on the desktop to the folder TextFiles.

I would say that first and foremost: be consistent.

I reckon you are almost there with the conventions that you have outlined in your question. A couple of comments though:

Points 1 and 2 are good I reckon.

Point 3 - sadly this is not always possible. Think about how you would cope with a single table foo_bar that has columns foo_id and another_foo_id both of which reference the foo table foo_id column. You might want to consider how to deal with this. This is a bit of a corner case though!

Point 4 - Similar to Point 3. You may want to introduce a number at the end of the foreign key name to cater for having more than one referencing column.

Point 5 - I would avoid this. It provides you with little and will become a headache when you want to add or remove columns from a table at a later date.

Some other points are:

Index Naming Conventions

You may wish to introduce a naming convention for indexes - this will be a great help for any database metadata work that you might want to carry out. For example you might just want to call an index foo_bar_idx1 or foo_idx1 - totally up to you but worth considering.

Singular vs Plural Column Names

It might be a good idea to address the thorny issue of plural vs single in your column names as well as your table name(s). This subject often causes big debates in the DB community. I would stick with singular forms for both table names and columns. There. I've said it.

The main thing here is of course consistency!

Is this what you're looking for?:

:"Book Author Title"

:)

try this:

SELECT * FROM TableA
JOIN TableB ON TableA.primary_key = TableB.foreign_key 
JOIN TableB ON TableB.foreign_key = TableC.foreign_key

A direct process to install / configure Plugin Manager :

1. Download the latest version of NotepadPlus Plugin Manager from the official Github handle.
2. Extract the zip file.
3. Copy the pluginmanager.dll file and paste in C:\Program Files\Notepad++\Plugins\PluginManager directory.
4. Restart the Notepad++

Note: Create the PluginManager directory if it is not present.

A use case for it when you want to use a table with *ngIf and *ngFor - As putting a div in td/th will make the table element misbehave -. I faced this problem and that was the answer.

I would use git submodules.

have a look here Git repository in a Git repository

As per February2019, I would suggest Monorepos

• Lerna
• Bit

try importing the below package from random import*

Using Thread.currentThread():

private class MyTask implements Runnable {
    public void run() {
        long threadId = Thread.currentThread().getId();
        logger.debug("Thread # " + threadId + " is doing this task");
    }
}

The default value of a char data type is '\u0000' (or 0) and a maximum value of '\uffff' (or 65,535 inclusive).

You can see the info here.

See: Python Sound ("Bell")
This helped me when i wanted to do the same.
All credits go to gbc

Quote:

Have you tried :

import sys
sys.stdout.write('\a')
sys.stdout.flush()

That works for me here on Mac OS 10.5

Actually, I think your original attempt works also with a little modification:

print('\a')

(You just need the single quotes around the character sequence).

According to the documentation Checks the existence of files in the specified order and uses the first found file for request processing; the processing is performed in the current context. The path to a file is constructed from the file parameter according to the root and alias directives. It is possible to check directory’s existence by specifying a slash at the end of a name, e.g. “$uri/”. If none of the files were found, an internal redirect to the uri specified in the last parameter is made. Important

an internal redirect to the uri specified in the last parameter is made.

So in last parameter you should add your page or code if first two parameters returns false.

location / {
  try_files $uri $uri/index.html index.html;
}

If you like to count duplicates on particular column(s):

len(df['one'])-len(df['one'].drop_duplicates())

If you want to count duplicates on entire dataframe:

len(df)-len(df.drop_duplicates())

Or simply you can use DataFrame.duplicated(subset=None, keep='first'):

df.duplicated(subset='one', keep='first').sum()

where

subset : column label or sequence of labels(by default use all of the columns)

keep : {‘first’, ‘last’, False}, default ‘first’

• first : Mark duplicates as True except for the first occurrence.
• last : Mark duplicates as True except for the last occurrence.
• False : Mark all duplicates as True.

document.getElementById('username').value = 'foo';
document.getElementById('login_form').submit();

The fix for me was to set property HorizontalAlignment="Stretch" on ItemsPresenter inside ScrollViewer..

Hope this helps someone...

<Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="ListBox">
                    <ScrollViewer x:Name="ScrollViewer" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Foreground="{TemplateBinding Foreground}" Padding="{TemplateBinding Padding}" HorizontalAlignment="Stretch">
                        <ItemsPresenter  Height="252" HorizontalAlignment="Stretch"/>
                    </ScrollViewer>
                </ControlTemplate>
            </Setter.Value>
        </Setter>

I generally use a small jQuery snippet globally to open any external links in a new tab / window. I've added the selector for a form for my own site and it works fine so far:

// URL target
    $('a[href*="//"]:not([href*="'+ location.hostname +'"]),form[action*="//"]:not([href*="'+ location.hostname +'"]').attr('target','_blank');

You simply need to remove v-bind (:) from selected and required attributes. Like this :-

<template>_x000D_
    <select class="form-control" v-model="selected" required @change="changeLocation">_x000D_
        <option selected>Choose Province</option>_x000D_
        <option v-for="option in options" v-bind:value="option.id" >{{ option.name }}</option>_x000D_
    </select>_x000D_
</template>

You are not binding anything to the vue instance through these attributes thats why it is giving error.

Do you want to match a class exactly, e.g. only matching FileInputStream instead of any subclass of FileInputStream? If so, use getClass() and ==. I would typically do this in an equals, so that an instance of X isn't deemed equal to an instance of a subclass of X - otherwise you can get into tricky symmetry problems. On the other hand, that's more usually useful for comparing that two objects are of the same class than of one specific class.

Otherwise, use instanceof. Note that with getClass() you will need to ensure you have a non-null reference to start with, or you'll get a NullPointerException, whereas instanceof will just return false if the first operand is null.

Personally I'd say instanceof is more idiomatic - but using either of them extensively is a design smell in most cases.

You need to use WITH ROLLBACK IMMEDIATE to boot other conections out with no regards to what or who is is already using it.

Or use WITH NO_WAIT to not hang and not kill existing connections. See http://www.blackwasp.co.uk/SQLOffline.aspx for details

Dynamic Values (oh no! D;)

As npup explains in his answer, a simple css rule will only target the attribute value which means that this doesn't cover the actual value of the html node.

JAVASCRIPT TO THE RESCUE!

• Ugly workaround: http://jsfiddle.net/QmvHL/

Original Answer

Yes it's very possible, using css attribute selectors you can reference input's by their value in this sort of fashion:

input[value="United States"] { color: #F90; }?

• jsFiddle example

from the reference

• [att] Match when the element sets the "att" attribute, whatever the value of the attribute.

• [att=val] Match when the element's "att" attribute value is exactly "val".

• [att~=val] Represents an element with the att attribute whose value is a white space-separated list of words, one of which is exactly "val". If "val" contains white space, it will never represent anything (since the words are separated by spaces). If "val" is the empty string, it will never represent anything either.

• [att|=val] Represents an element with the att attribute, its value either being exactly "val" or beginning with "val" immediately followed by "-" (U+002D). This is primarily intended to allow language subcode matches (e.g., the hreflang attribute on the a element in HTML) as described in BCP 47 ([BCP47]) or its successor. For lang (or xml:lang) language subcode matching, please see the :lang pseudo-class.

• css attribute selectors reference

Pure javascript can do!

var scrollTop = window.pageYOffset || document.documentElement.scrollTop;

Popen expect a list of strings for non-shell calls and a string for shell calls.

Call subprocess.Popen with shell=True:

process = subprocess.Popen(command, stdout=tempFile, shell=True)

Hopefully this solves your issue.

This issue is listed here: https://bugs.python.org/issue17023

As Jose answered, screen -d -r should do the trick. This is a combination of two commands, as taken from the man page.

screen -d detaches the already-running screen session, and screen -r reattaches the existing session. By running screen -d -r, you force screen to detach it and then resume the session.

If you use the capital -D -RR, I quote the man page because it's too good to pass up.

Attach here and now. Whatever that means, just do it.

Note: It is always a good idea to check the status of your sessions by means of "screen -list".

You'll want a Map<String, String>. Classes that implement the Map interface include (but are not limited to):

• HashMap
• LinkedHashMap
• Hashtable

Each is designed/optimized for certain situations (go to their respective docs for more info). HashMap is probably the most common; the go-to default.

For example (using a HashMap):

Map<String, String> map = new HashMap<String, String>();
map.put("dog", "type of animal");
System.out.println(map.get("dog"));

type of animal

for sbt, use below versions

val glassfishEl = "org.glassfish" % "javax.el" % "3.0.1-b09"

val hibernateValidator = "org.hibernate.validator" % "hibernate-validator" % "6.0.17.Final"

val hibernateValidatorCdi = "org.hibernate.validator" % "hibernate-validator-cdi" % "6.0.17.Final"

This would be work very fine

<a href="<%:Url.Action("Edit","Account",new {  id=item.UserId }) %>"><img src="../../Content/ThemeNew/images/edit_notes_delete11.png" alt="Edit" width="25px" height="25px" /></a>

If you used debian-based OS, you can simply run

apt-get install ca-certificates

Another thing is that all libraries from google (e.g. support lib, CardView and etc.) should have identical versions

You can use the BitConverter.ToString method:

byte[] bytes = {0, 1, 2, 4, 8, 16, 32, 64, 128, 256}
Console.WriteLine( BitConverter.ToString(bytes));

Output:

00-01-02-04-08-10-20-40-80-FF

More information: BitConverter.ToString Method (Byte[])

Use the Debug.WriteLine. This will display your message in the Output window immediately. The only restriction is that you must run your test in Debug mode.

[TestMethod]
public void TestMethod1()
{
    Debug.WriteLine("Time {0}", DateTime.Now);
    System.Threading.Thread.Sleep(30000);
    Debug.WriteLine("Time {0}", DateTime.Now);
}

Output

Since car has not been initialized, it has no length, its value is null. However, the compiler won't even allow you to compile that code as is, throwing the following error: variable car might not have been initialized.

You need to initialize it first, and then you can use .length:

String car[] = new String[] { "BMW", "Bentley" };
System.out.println(car.length);

If you need to initialize an empty array, you can use the following:

String car[] = new String[] { }; // or simply String car[] = { };
System.out.println(car.length);

If you need to initialize it with a specific size, in order to fill certain positions, you can use the following:

String car[] = new String[3]; // initialize a String[] with length 3
System.out.println(car.length); // 3
car[0] = "BMW";
System.out.println(car.length); // 3

However, I'd recommend that you use a List instead, if you intend to add elements to it:

List<String> cars = new ArrayList<String>();
System.out.println(cars.size()); // 0
cars.add("BMW");
System.out.println(cars.size()); // 1

In case you're using pure razor, i.e. no MVC controller:

<button name="SubmitForm" value="Hello">Hello</button>
<button name="SubmitForm" value="World">World</button>
@if (IsPost)
{
    <p>@Request.Form["SubmitForm"]</p>
}

Clicking each of the buttons should render out Hello and World.

defaultMember already is an alias - it doesn't need to be the name of the exported function/thing. Just do

import alias from 'my-module';

Alternatively you can do

import {default as alias} from 'my-module';

but that's rather esoteric.

You may want to consider using <<<

e.g.

<<<VARIABLE
this is some
random text
that I'm typing 
here and I will end it with the 
same word I started it with
VARIABLE

More info at: http://php.net/manual/en/language.types.string.php

Btw - Some Coding environments don't know how to handle the above syntax.

$('.submit').filter(':checked').each(function() {
    //This is same as 'continue'
    if(something){
        return true;
    }
    //This is same as 'break'
    if(something){
        return false;
    }
});

Simply add these two functions in your viewcontroller it will solve your problem. Here, list is a string array which contain your string of every row.

 func tableView(_ tableView: UITableView, 
   estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
        tableView.rowHeight = self.calculateHeight(inString: list[indexPath.row])

    return (tableView.rowHeight) 
}

func calculateHeight(inString:String) -> CGFloat
{
    let messageString = input.text
    let attributes : [NSAttributedStringKey : Any] = [NSAttributedStringKey(rawValue: NSAttributedStringKey.font.rawValue) : UIFont.systemFont(ofSize: 15.0)]

    let attributedString : NSAttributedString = NSAttributedString(string: messageString!, attributes: attributes)

    let rect : CGRect = attributedString.boundingRect(with: CGSize(width: 222.0, height: CGFloat.greatestFiniteMagnitude), options: .usesLineFragmentOrigin, context: nil)

    let requredSize:CGRect = rect
    return requredSize.height
}

If you use ssh and get

Permission to some_username/repository.git denied to Alice_username

while you don't wanna push as Alice_username, make sure Alice_username doesn't have your computer's ssh key added to its github account.

I deleted my ssh key from alice's github account and the push worked.

It is as simple as that ... C++ is providing you a function in STL (Standard Template Library) called sort which runs 20% to 50% faster than the hand-coded quick-sort.

Here is the sample code for it's usage:

std::sort(arr, arr + size);

This helped me at the end:

Quick guide:

• Download Google USB Driver

• Connect your device with Android Debugging enabled to your PC

• Open Device Manager of Windows from System Properties.

• Your device should appear under Other devices listed as something like Android ADB Interface or 'Android Phone' or similar. Right-click that and click on Update Driver Software...

• Select Browse my computer for driver software

• Select Let me pick from a list of device drivers on my computer

• Double-click Show all devices

• Press the Have disk button

• Browse and navigate to [wherever your SDK has been installed]\google-usb_driver and select android_winusb.inf

• Select Android ADB Interface from the list of device types.

• Press the Yes button

• Press the Install button

• Press the Close button

Now you've got the ADB driver set up correctly. Reconnect your device if it doesn't recognize it already.

1. PM>Uninstall-Package EntityFramework -Force
2. PM>Iinstall-Package EntityFramework -Pre -Version 6.0.0

I solve this problem with this code in NugetPackageConsole.and it works.The problem was in the version. i thikn it will help others.

one liner, without opening ~/.zshrc file

echo -n 'export PATH=~/bin:$PATH' >> ~/.zshrc

or

echo -n 'export PATH=$HOME/bin:$PATH' >> ~/.zshrc

To see the effect, do source ~/.zshrc in the same tab or open a new tab

The better way of sending GET or POST requests with PHP is as below:

<?php
    $r = new HttpRequest('http://example.com/form.php', HttpRequest::METH_POST);
    $r->setOptions(array('cookies' => array('lang' => 'de')));
    $r->addPostFields(array('user' => 'mike', 'pass' => 's3c|r3t'));

    try {
        echo $r->send()->getBody();
    } catch (HttpException $ex) {
        echo $ex;
    }
?>

The code is taken from official documentation here http://docs.php.net/manual/da/httprequest.send.php

Forget float, margin and html 3/5. The mail is very obsolete. You need do all with table. One line = one table. You need margin or padding ? Do another column.

Codepen

Example : i need one line with 1 One Picture of 40*40 2 One margin of 10 px 3 One text of 400px

I start my line :

<table style=" background-repeat:no-repeat; width:450px;margin:0;" cellpadding="0" cellspacing="0" border="0">
   <tr style="height:40px; width:450px; margin:0;">
     <td style="height:40px; width:40px; margin:0;">
        <img src="" style="width=40px;height40;margin:0;display:block"
     </td>
     <td style="height:40px; width:10px; margin:0;">        
     </td>
     <td style="height:40px; width:400px; margin:0;">
     <p style=" margin:0;"> my text   </p>
     </td>
   </tr>
</table>

The difference lies in the fact that ./gradlew indicates you are using a gradle wrapper. The wrapper is generally part of a project and it facilitates installation of gradle. If you were using gradle without the wrapper you would have to manually install it - for example, on a mac brew install gradle and then invoke gradle using the gradle command. In both cases you are using gradle, but the former is more convenient and ensures version consistency across different machines.

Each Wrapper is tied to a specific version of Gradle, so when you first run one of the commands above for a given Gradle version, it will download the corresponding Gradle distribution and use it to execute the build.

Not only does this mean that you don’t have to manually install Gradle yourself, but you are also sure to use the version of Gradle that the build is designed for. This makes your historical builds more reliable

Read more here - https://docs.gradle.org/current/userguide/gradle_wrapper.html

Also, Udacity has a neat, high level video explaining the concept of the gradle wrapper - https://www.youtube.com/watch?v=1aA949H-shk

I don't want to start a "What's the best unix command line under Windows" war, but have you thought of Cygwin? Git is in the Cygwin package repository.

And you get a lot of beneficial side-effects! (:-)

See Heroku “psql: FATAL: remaining connection slots are reserved for non-replication superuser connections”:

Heroku sometimes has a problem with database load balancing.

André Laszlo, markshiz and me all reported dealing with that in comments on the question.

To save you the support call, here's the response I got from Heroku Support for a similar issue:

Hello,

One of the limitations of the hobby tier databases is unannounced maintenance. Many hobby databases run on a single shared server, and we will occasionally need to restart that server for hardware maintenance purposes, or migrate databases to another server for load balancing. When that happens, you'll see an error in your logs or have problems connecting. If the server is restarting, it might take 15 minutes or more for the database to come back online.

Most apps that maintain a connection pool (like ActiveRecord in Rails) can just open a new connection to the database. However, in some cases an app won't be able to reconnect. If that happens, you can heroku restart your app to bring it back online.

This is one of the reasons we recommend against running hobby databases for critical production applications. Standard and Premium databases include notifications for downtime events, and are much more performant and stable in general. You can use pg:copy to migrate to a standard or premium plan.

If this continues, you can try provisioning a new database (on a different server) with heroku addons:add, then use pg:copy to move the data. Keep in mind that hobby tier rules apply to the $9 basic plan as well as the free database.

Thanks, Bradley

/proc/net/tcp -a list of open tcp sockets

/proc/net/udp -a list of open udp sockets

/proc/net/raw -a list all the 'raw' sockets

These are the files, use cat command to view them. For example:

cat /proc/net/tcp

You can also use the lsof command.

lsof is a command meaning "list open files", which is used in many Unix-like systems to report a list of all open files and the processes that opened them.

If you're using AForge.NET:

using(var croppedBitmap = new Crop(new Rectangle(10, 10, 10, 10)).Apply(bitmap))
{
    // ...
}

If you are having 112 columns in one single table and you would like to insert data from source table, you could do as

create table employees as select * from source_employees where employee_id=100;

Or from sqlplus do as

copy from source_schema/password insert employees using select * from 
source_employees where employee_id=100;

Rotating a vector 90 degrees is particularily simple.

(x, y) rotated 90 degrees around (0, 0) is (-y, x).

If you want to rotate clockwise, you simply do it the other way around, getting (y, -x).

For me the filename involved was appended with a querystring, which this function didn't like.

$path = 'path/to/my/file.js?v=2'

Solution was to chop that off first:

$path = preg_replace('/\?v=[\d]+$/', '', $path);
$fileTime = filemtime($path);

You can also get your wanted time using the following JS code:

new Date(`${post.data.created_at} GMT+0200`)

In this example, my received dates were in GMT+0200 timezone. Instead of it can be every single timezone. And the returned data will be the date in your timezone. Hope this will help anyone to save time

select orderID, sum(subtotal) as order_total from
(
    select orderID, productID, price, qty, price * qty as subtotal
    from product p inner join orderitem o on p.id = o.productID
    where o.orderID = @orderID
) t
group by orderID

Try the HTML code: •

Which will appear as: •

No answers about few files, so:

sort -u file1 file2 -o file1

It is interesting to note the following situation where the do {} while (0) loop won't work for you:

If you want a function-like macro that returns a value, then you will need a statement expression: ({stmt; stmt;}) instead of do {} while(0):

#include <stdio.h>

#define log_to_string1(str, fmt, arg...) \
    do { \
        sprintf(str, "%s: " fmt, "myprog", ##arg); \
    } while (0)

#define log_to_string2(str, fmt, arg...) \
    ({ \
        sprintf(str, "%s: " fmt, "myprog", ##arg); \
    })

int main() {
        char buf[1000];
        int n = 0;

        log_to_string1(buf, "%s\n", "No assignment, OK");

        n += log_to_string1(buf + n, "%s\n", "NOT OK: gcc: error: expected expression before 'do'");

        n += log_to_string2(buf + n, "%s\n", "This fixes it");
        n += log_to_string2(buf + n, "%s\n", "Assignment worked!");
        printf("%s", buf);
        return 0;
}

This centers the "A" below the image:

<div style="text-align:center">
  <asp:Image ID="Image1" runat="server" ImageUrl="~/Images/opentoselect.gif" />
  <br />
  A
</div>

That is ASP.Net and it would render the HTML as:

<div style="text-align:center">
<img id="Image1" src="Images/opentoselect.gif" style="border-width:0px;" />
<br />
A
</div>

tree /f /a

About

The Windows command tree /f /a produces a tree of the current folder and all files & folders contained within it in ASCII format.

The output can be redirected to a text file using the > parameter.

Method

For Windows 8.1 or Windows 10, follow these steps:

1. Navigate into the folder in file explorer.
2. Press Shift, right-click mouse, and select "Open command window here".
3. Type tree /f /a > tree.txt and press Enter.
4. Open the new tree.txt file in your favourite text editor/viewer.

Note: Windows 7, Vista, XP and earlier users can type cmd in the run command box in the start menu for a command window.

1. In Android Studio, select View > Tool Windows > Logcat to open Logcat.
2. Select the device and a process from the drop-down at the top of the window.
3. Click Screen Capture on the left side of the window.

For more info Check this link

This should work...

JavaScriptSerializer ser = new JavaScriptSerializer();
var records = new ser.Deserialize<List<Record>>(jsonData);

public class Person
{
    public string Name;
    public int Age;
    public string Location;
}
public class Record
{
    public Person record;
}

I have Windows 8.1 and I too had this problem. My teacher told me it was probably because my MySQL server had stopped running. She told me to go into the Computer Management utility (right click the lower-most left hand corner of the screen on Windows 8.1 to access Computer Management). Then under Services and Applications, open up the Services and find MySQL. You should be able to right-click on MySQL and restart it.

I didn't want to add dependency to another JAR file because of this, so wrote something which would suit my needs. I follow the convention of fjorm https://code.google.com/p/fjorm/ which means that my generally accessible fields are public and that I don't bother to write setters and getters. (in my opinion code is easier to manage and more readable actually)

So I wrote something (it's not actually much difficult) which suits my needs (assumes that the class has public constructor without args) and it could be extracted into utility class

  public Effect copyUsingReflection() {
    Constructor constructorToUse = null;
    for (Constructor constructor : this.getClass().getConstructors()) {
      if (constructor.getParameterTypes().length == 0) {
        constructorToUse = constructor;
        constructorToUse.setAccessible(true);
      }
    }
    if (constructorToUse != null) {
      try {
        Effect copyOfEffect = (Effect) constructorToUse.newInstance();
        for (Field field : this.getClass().getFields()) {
          try {
            Object valueToCopy = field.get(this);
            //if it has field of the same type (Effect in this case), call the method to copy it recursively
            if (valueToCopy instanceof Effect) {
              valueToCopy = ((Effect) valueToCopy).copyUsingReflection();
            }
            //TODO add here other special types of fields, like Maps, Lists, etc.
            field.set(copyOfEffect, valueToCopy);
          } catch (IllegalArgumentException | IllegalAccessException ex) {
            Logger.getLogger(Effect.class.getName()).log(Level.SEVERE, null, ex);
          }
        }
        return copyOfEffect;
      } catch (InstantiationException | IllegalAccessException | IllegalArgumentException | InvocationTargetException ex) {
        Logger.getLogger(Effect.class.getName()).log(Level.SEVERE, null, ex);
      }
    }
    return null;
  }

Update: Angular v6+

For Apps converted from older versions (Angular v2 - v5): HttpModule is now deprecated and you need to replace it with HttpClientModule or else you will get the error too.

1. In your app.module.ts replace import { HttpModule } from '@angular/http'; with the new HttpClientModule import { HttpClientModule} from "@angular/common/http"; Note: Be sure to then update the modules imports[] array by removing the old HttpModule and replacing it with the new HttpClientModule.
2. In any of your services that used HttpModule replace import { Http } from '@angular/http'; with the new HttpClient import { HttpClient } from '@angular/common/http';

3. Update how you handle your Http response. For example - If you have code that looks like this

   http.get('people.json').subscribe((res:Response) => this.people = res.json());

The above code example will result in an error. We no longer need to parse the response, because it already comes back as JSON in the config object.

The subscription callback copies the data fields into the component's config object, which is data-bound in the component template for display.

For more information please see the - Angular HttpClientModule - Official Documentation

Use a couple of functions and a boolean. Here's a pattern, not full code:

 var state = false,
     oddONes = function () {...},
     evenOnes = function() {...};

 $("#time").click(function(){
     if(!state){
        evenOnes();
     } else {
        oddOnes();
     }
     state = !state;
  });

Or

  var cases[] = {
      function evenOnes(){...},  // these could even be anonymous functions
      function oddOnes(){...}    // function(){...}
  };

  var idx = 0; // should always be 0 or 1

  $("#time").click(function(idx){cases[idx = ((idx+1)%2)]()}); // corrected

(Note the second is off the top of my head and I mix languages a lot, so the exact syntax isn't guaranteed. Should be close to real Javascript through.)

ecatmur's solution will work fine. This will be better performance on large datasets, though:

data.groupby(data['date'].map(lambda x: x.year))

You can return json in PHP this way:

header('Content-Type: application/json');
echo json_encode(array('foo' => 'bar'));
exit;

An easier way to do this is using crop from ImageOps. You can feed the number of pixels you want to crop from each side.

from PIL import ImageOps

border = (0, 30, 0, 30) # left, up, right, bottom
ImageOps.crop(img, border)

Having searched around several posts. On Windows 10 having downloaded and installed Github for Windows 2.10.2 I found the git.exe in

C:\Users\<user>\AppData\Local\Programs\Git\bin

and the git-cmd.exe in

C:\Users\<user>\AppData\Local\Programs\Git

Please note the change to Programs folder within Local from the above posts.

Multiple commands' output can be redirected. This works for either the command line or most usefully in a bash script. The -s directs the password prompt to the screen.

Hereblock cmds stdout/stderr are sent to seperate files and nothing to display.

sudo -s -u username <<'EOF' 2>err 1>out
ls; pwd;
EOF

Hereblock cmds stdout/stderr are sent to a single file and display.

sudo -s -u username <<'EOF' 2>&1 | tee out
ls; pwd;
EOF

Hereblock cmds stdout/stderr are sent to separate files and stdout to display.

sudo -s -u username <<'EOF' 2>err | tee out
ls; pwd;
EOF

Depending on who you are(whoami) and username a password may or may not be required.

I would not do that. I would keep the profileID as primary key of the table Profile

A foreign key is just a referential constraint between two tables

One could argue that a primary key is necessary as the target of any foreign keys which refer to it from other tables. A foreign key is a set of one or more columns in any table (not necessarily a candidate key, let alone the primary key, of that table) which may hold the value(s) found in the primary key column(s) of some other table. So we must have a primary key to match the foreign key. Or must we? The only purpose of the primary key in the primary key/foreign key pair is to provide an unambiguous join - to maintain referential integrity with respect to the "foreign" table which holds the referenced primary key. This insures that the value to which the foreign key refers will always be valid (or null, if allowed).

http://www.aisintl.com/case/primary_and_foreign_key.html

What you have is correct, but this is more consice:

^[A-Z]{3}$

You are not setting a classpath that includes your compiled class! java can't find any classes if you don't tell it where to look.

java -cp [compiler outpur dir] HelloWorld

Incidentally you do not need to set CLASSPATH the way you have done.

If you have access to the Java 8 Comparable API, Comparable.comparingToInt() may be of use. (See Java 8 Comparable Documentation).

For example, a Comparator<Dog> to sort Dog instances descending by age could be created with the following:

Comparable.comparingToInt(Dog::getDogAge).reversed();

The function take a lambda mapping T to Integer, and creates an ascending comparator. The chained function .reversed() turns the ascending comparator into a descending comparator.

Note: while this may not be useful for most versions of Android out there, I came across this question while searching for similar information for a non-Android Java application. I thought it might be useful to others in the same spot to see what I ended up settling on.

To deserialize the response need to use HashMap:

String resp = ...//String output from your source

Gson gson = new GsonBuilder().create();
gson.fromJson(resp,TheResponse.class);

class TheResponse{
 HashMap<String,Song> songs;
}

class Song{
  String id;
  String pos;
}

Yes, the DataTable.Select method supports boolean operators in the same way that you would use them in a "real" SQL statement:

DataRow[] results = table.Select("A = 'foo' AND B = 'bar' AND C = 'baz'");

See DataColumn.Expression in MSDN for the syntax supported by DataTable's Select method.

For Mapping Composite primary key using Entity framework we can use two approaches.

1) By Overriding the OnModelCreating() Method

For ex: I have the model class named VehicleFeature as shown below.

public class VehicleFeature
{
    public int VehicleId { get; set; }
    public int FeatureId{get;set;}
    public Vehicle Vehicle{get;set;}
    public Feature Feature{get;set;}
}

The Code in my DBContext would be like ,

public class VegaDbContext : DbContext
{
    public DbSet<Make> Makes{get;set;}

    public DbSet<Feature> Features{get;set;}
    public VegaDbContext(DbContextOptions<VegaDbContext> options):base(options)        
    {           

    }
    // we override the OnModelCreating method here.
    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.Entity<VehicleFeature>().HasKey(vf=> new {vf.VehicleId, vf.FeatureId});
    }
}

2) By Data Annotations.

public class VehicleFeature
{
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]  
    [Key]
    public int VehicleId { get; set; }
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]   
    [Key]
    public int FeatureId{get;set;}
    public Vehicle Vehicle{get;set;}
    public Feature Feature{get;set;}
}

Please refer the below links for the more information.

1) https://msdn.microsoft.com/en-us/library/jj591617(v=vs.113).aspx

2) How to add a composite unique key using EF 6 Fluent Api?

From Spring's AnnotationTransactionAspect:

/**
 * Matches the execution of any public method in a type with the Transactional
 * annotation, or any subtype of a type with the Transactional annotation.
 */
private pointcut executionOfAnyPublicMethodInAtTransactionalType() :
    execution(public * ((@Transactional *)+).*(..)) && within(@Transactional *);

You will need a custom class loader for this, have a look at One Jar.

One-JAR lets you package a Java application together with its dependency Jars into a single executable Jar file.

It has an ant task which can simplify the building of it as well.

REFERENCE (from background)

Most developers reasonably assume that putting a dependency Jar file into their own Jar file, and adding a Class-Path attribute to the META-INF/MANIFEST will do the trick:

jarname.jar
| /META-INF
| |  MANIFEST.MF
| |    Main-Class: com.mydomain.mypackage.Main
| |    Class-Path: commons-logging.jar
| /com/mydomain/mypackage
| |  Main.class
| commons-logging.jar

Unfortunately this is does not work. The Java Launcher$AppClassLoader does not know how to load classes from a Jar inside a Jar with this kind of Class-Path. Trying to use jar:file:jarname.jar!/commons-logging.jar also leads down a dead-end. This approach will only work if you install (i.e. scatter) the supporting Jar files into the directory where the jarname.jar file is installed.

The DB I was importing had a conflict during the import due to the presence of a column both autoincrement and primary key.

The problem was that in the .sql file the table was chopped into multiple "INSERT INTO" and during the import these queries were executed all together.

MY SOLUTION was to deselect the "Run multiple queries in each execution" on Navicat and it worked perfectly

Introduction

You should use doGet() when you want to intercept on HTTP GET requests. You should use doPost() when you want to intercept on HTTP POST requests. That's all. Do not port the one to the other or vice versa (such as in Netbeans' unfortunate auto-generated processRequest() method). This makes no utter sense.

GET

Usually, HTTP GET requests are idempotent. I.e. you get exactly the same result everytime you execute the request (leaving authorization/authentication and the time-sensitive nature of the page —search results, last news, etc— outside consideration). We can talk about a bookmarkable request. Clicking a link, clicking a bookmark, entering raw URL in browser address bar, etcetera will all fire a HTTP GET request. If a Servlet is listening on the URL in question, then its doGet() method will be called. It's usually used to preprocess a request. I.e. doing some business stuff before presenting the HTML output from a JSP, such as gathering data for display in a table.

@WebServlet("/products")
public class ProductsServlet extends HttpServlet {

    @EJB
    private ProductService productService;

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        List<Product> products = productService.list();
        request.setAttribute("products", products); // Will be available as ${products} in JSP
        request.getRequestDispatcher("/WEB-INF/products.jsp").forward(request, response);
    }

}

Note that the JSP file is explicitly placed in /WEB-INF folder in order to prevent endusers being able to access it directly without invoking the preprocessing servlet (and thus end up getting confused by seeing an empty table).

<table>
    <c:forEach items="${products}" var="product">
        <tr>
            <td>${product.name}</td>
            <td><a href="product?id=${product.id}">detail</a></td>
        </tr>
    </c:forEach>
</table>

Also view/edit detail links as shown in last column above are usually idempotent.

@WebServlet("/product")
public class ProductServlet extends HttpServlet {

    @EJB
    private ProductService productService;

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        Product product = productService.find(request.getParameter("id"));
        request.setAttribute("product", product); // Will be available as ${product} in JSP
        request.getRequestDispatcher("/WEB-INF/product.jsp").forward(request, response);
    }

}

<dl>
    <dt>ID</dt>
    <dd>${product.id}</dd>
    <dt>Name</dt>
    <dd>${product.name}</dd>
    <dt>Description</dt>
    <dd>${product.description}</dd>
    <dt>Price</dt>
    <dd>${product.price}</dd>
    <dt>Image</dt>
    <dd><img src="productImage?id=${product.id}" /></dd>
</dl>

POST

HTTP POST requests are not idempotent. If the enduser has submitted a POST form on an URL beforehand, which hasn't performed a redirect, then the URL is not necessarily bookmarkable. The submitted form data is not reflected in the URL. Copypasting the URL into a new browser window/tab may not necessarily yield exactly the same result as after the form submit. Such an URL is then not bookmarkable. If a Servlet is listening on the URL in question, then its doPost() will be called. It's usually used to postprocess a request. I.e. gathering data from a submitted HTML form and doing some business stuff with it (conversion, validation, saving in DB, etcetera). Finally usually the result is presented as HTML from the forwarded JSP page.

<form action="login" method="post">
    <input type="text" name="username">
    <input type="password" name="password">
    <input type="submit" value="login">
    <span class="error">${error}</span>
</form>

...which can be used in combination with this piece of Servlet:

@WebServlet("/login")
public class LoginServlet extends HttpServlet {

    @EJB
    private UserService userService;

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String username = request.getParameter("username");
        String password = request.getParameter("password");
        User user = userService.find(username, password);

        if (user != null) {
            request.getSession().setAttribute("user", user);
            response.sendRedirect("home");
        }
        else {
            request.setAttribute("error", "Unknown user, please try again");
            request.getRequestDispatcher("/login.jsp").forward(request, response);
        }
    }

}

You see, if the User is found in DB (i.e. username and password are valid), then the User will be put in session scope (i.e. "logged in") and the servlet will redirect to some main page (this example goes to http://example.com/contextname/home), else it will set an error message and forward the request back to the same JSP page so that the message get displayed by ${error}.

You can if necessary also "hide" the login.jsp in /WEB-INF/login.jsp so that the users can only access it by the servlet. This keeps the URL clean http://example.com/contextname/login. All you need to do is to add a doGet() to the servlet like this:

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    request.getRequestDispatcher("/WEB-INF/login.jsp").forward(request, response);
}

(and update the same line in doPost() accordingly)

That said, I am not sure if it is just playing around and shooting in the dark, but the code which you posted doesn't look good (such as using compareTo() instead of equals() and digging in the parameternames instead of just using getParameter() and the id and password seems to be declared as servlet instance variables — which is NOT threadsafe). So I would strongly recommend to learn a bit more about basic Java SE API using the Oracle tutorials (check the chapter "Trails Covering the Basics") and how to use JSP/Servlets the right way using those tutorials.

See also:

• Our servlets wiki page
• Java EE web development, where do I start and what skills do I need?
• Servlet returns "HTTP Status 404 The requested resource (/servlet) is not available"
• Show JDBC ResultSet in HTML in JSP page using MVC and DAO pattern

Update: as per the update of your question (which is pretty major, you should not remove parts of your original question, this would make the answers worthless .. rather add the information in a new block) , it turns out that you're unnecessarily setting form's encoding type to multipart/form-data. This will send the request parameters in a different composition than the (default) application/x-www-form-urlencoded which sends the request parameters as a query string (e.g. name1=value1&name2=value2&name3=value3). You only need multipart/form-data whenever you have a <input type="file"> element in the form to upload files which may be non-character data (binary data). This is not the case in your case, so just remove it and it will work as expected. If you ever need to upload files, then you'll have to set the encoding type so and parse the request body yourself. Usually you use the Apache Commons FileUpload there for, but if you're already on fresh new Servlet 3.0 API, then you can just use builtin facilities starting with HttpServletRequest#getPart(). See also this answer for a concrete example: How to upload files to server using JSP/Servlet?

You don't need anything fancy: the following contains a new line (two, actually):

<summary>Tootsie roll tiramisu macaroon wafer carrot cake.       
         Danish topping sugar plum tart bonbon caramels cake.
</summary>

The question is, why isn't this newline having the desired effect: and that's a question about what the recipient of the XML is actually doing with it. For example, if the recipient is translating it to HTML and the HTML is being displayed in the browser, then the newline will be converted to a space by the browser. You need to tell us something about the processing pipeline.

Try connecting without any password:

mysql -u root

I believe the initial default is no password for the root account (which should obviously be changed as soon as possible).

The issue with only having these two conditions:

  <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
  <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />

is that they work only as long as the {REQUEST_FILENAME} exists physically on disk. This means that there can be scenarios where a request for an incorrectly named partial view would return the root page instead of a 404 which would cause angular to be loaded twice (and in certain scenarios it can cause a nasty infinite loop).

Thus, some safe "fallback" rules would be recommended to avoid these hard to troubleshoot issues:

  <add input="{REQUEST_FILENAME}" pattern="(.*?)\.html$" negate="true" />
  <add input="{REQUEST_FILENAME}" pattern="(.*?)\.js$" negate="true" />
  <add input="{REQUEST_FILENAME}" pattern="(.*?)\.css$" negate="true" />

or a condition that matches any file ending:

<conditions>
  <!-- ... -->
  <add input="{REQUEST_FILENAME}" pattern=".*\.[\d\w]+$" negate="true" />
</conditions>