Programs & Examples On #Program structure

Install mysysgit. (Same as Greg Hewgill's answer.)

Install Tortoisegit. (Tortoisegit requires mysysgit or something similiar like Cygwin.)

After TortoiseGit is installed, right-click on a folder, select Git Clone..., then enter the Url of the repository, then click Ok.

This answer is not any better than just installing mysysgit, but you can avoid the dreaded command line. :)

You can't, not if you are talking about applications built with the official SDK and deploying straight from xcode.

You can also look into using the Collection Object. This usually works better than an array for custom objects, since it dynamically sizes and has methods for:

• Add
• Count
• Remove
• Item(index)

Plus its normally easier to loop through a collection too since you can use the for...each structure very easily with a collection.

The usage info:

Usage: brew switch <formula> <version>

Example:

brew switch mysql 5.5.29

You can find the versions installed on your system with info.

brew info mysql

And to see the available versions to install, you can provide a dud version number, as brew will helpfully respond with the available version numbers:

brew switch mysql 0

Update (15.10.2014):

The brew versions command has been removed from brew, but, if you do wish to use this command first run brew tap homebrew/boneyard.

The recommended way to install an old version is to install from the homebrew/versions repo as follows:

$ brew tap homebrew/versions
$ brew install mysql55

For detailed info on all the ways to install an older version of a formula read this answer.

Alright, I had the same problem, and none of these answers worked for me (I'm running Windows 8). I tried running tools/android.bat and noticed I got some errors there. I investigated further and it seems there is something wrong in the code that finds your Java path.

This is how you fix it:

1. Open up tools/android.bat in your favorite text editor

2. Search for this piece of code:

   set java_exe=
   call lib\find_java.bat
   if not defined java_exe goto :EOF
   

3. Replace it with this:

   set java_exe=D:\Program Files\Java\jdk1.7.0_07\bin\java.exe 
   

   where the path is the path to your Java exe.

4. Run android.bat

(in my case I had to specify the path to java_exe in step 3 with no quotes to make it work.)

You can use this code to send CSV file data into an array:

import numpy as np
csv = np.genfromtxt('test.csv', delimiter=",")
print(csv)

This should work...

var displayDate = new Date().toLocaleDateString();

alert(displayDate);

But I suspect you are trying it on something else, for example:

var displayDate = Date.now.toLocaleDateString(); // No!

alert(displayDate);

Using subset:

missing<-subset(a1, !(a %in% a2$a))

Fixed by following this advice:

[...] can you try to reset everything?

pkill docker
iptables -t nat -F
ifconfig docker0 down
brctl delbr docker0
docker -d

It will force docker to recreate the bridge and reinit all the network rules

https://github.com/dotcloud/docker/issues/866#issuecomment-19218300

Seems the interface was 'hung' somehow.

Update for more recent versions of docker:

The above answer might still get the job done for you but it has been quite a long time since this answer was posted and docker is more polished now so make sure you try these first before going into mangling with iptables and all.

sudo service docker restart or (if you are in a linux distro that does not use upstart) sudo systemctl restart docker

Because I dislike seeing "HTTPContext.Current.Session" about the place, I use a singleton pattern to access session variables, it gives you an easy to access strongly typed bag of data.

[Serializable]
public sealed class SessionSingleton
{
    #region Singleton

    private const string SESSION_SINGLETON_NAME = "Singleton_502E69E5-668B-E011-951F-00155DF26207";

    private SessionSingleton()
    {

    }

    public static SessionSingleton Current
    {
        get
        {
            if ( HttpContext.Current.Session[SESSION_SINGLETON_NAME] == null )
            {
                HttpContext.Current.Session[SESSION_SINGLETON_NAME] = new SessionSingleton();
            }

            return HttpContext.Current.Session[SESSION_SINGLETON_NAME] as SessionSingleton;
        }
    }

    #endregion

    public string SessionVariable { get; set; }
    public string SessionVariable2 { get; set; }

    // ...

then you can access your data from anywhere:

SessionSingleton.Current.SessionVariable = "Hello, World!";

If you prefer not to write your own function, try check.integer from package installr. Currently it uses VitoshKa's answer.

Also try check.numeric(v, only.integer=TRUE) from package varhandle, which has the benefit of being vectorized.

The answer comes from the javadoc of ZoneId (emphasis mine) ...

A ZoneId is used to identify the rules used to convert between an Instant and a LocalDateTime. There are two distinct types of ID:

• Fixed offsets - a fully resolved offset from UTC/Greenwich, that uses the same offset for all local date-times
• Geographical regions - an area where a specific set of rules for finding the offset from UTC/Greenwich apply

Most fixed offsets are represented by ZoneOffset. Calling normalized() on any ZoneId will ensure that a fixed offset ID will be represented as a ZoneOffset.

... and from the javadoc of ZoneId#of (emphasis mine):

This method parses the ID producing a ZoneId or ZoneOffset. A ZoneOffset is returned if the ID is 'Z', or starts with '+' or '-'.

The argument id is specified as "UTC", therefore it will return a ZoneId with an offset, which also presented in the string form:

System.out.println(now.withZoneSameInstant(ZoneOffset.UTC));
System.out.println(now.withZoneSameInstant(ZoneId.of("UTC")));

Outputs:

2017-03-10T08:06:28.045Z
2017-03-10T08:06:28.045Z[UTC]

As you use the equals method for comparison, you check for object equivalence. Because of the described difference, the result of the evaluation is false.

When the normalized() method is used as proposed in the documentation, the comparison using equals will return true, as normalized() will return the corresponding ZoneOffset:

Normalizes the time-zone ID, returning a ZoneOffset where possible.

now.withZoneSameInstant(ZoneOffset.UTC)
    .equals(now.withZoneSameInstant(ZoneId.of("UTC").normalized())); // true

As the documentation states, if you use "Z" or "+0" as input id, of will return the ZoneOffset directly and there is no need to call normalized():

now.withZoneSameInstant(ZoneOffset.UTC).equals(now.withZoneSameInstant(ZoneId.of("Z"))); //true
now.withZoneSameInstant(ZoneOffset.UTC).equals(now.withZoneSameInstant(ZoneId.of("+0"))); //true

To check if they store the same date time, you can use the isEqual method instead:

now.withZoneSameInstant(ZoneOffset.UTC)
    .isEqual(now.withZoneSameInstant(ZoneId.of("UTC"))); // true

Sample

System.out.println("equals - ZoneId.of(\"UTC\"): " + nowZoneOffset
        .equals(now.withZoneSameInstant(ZoneId.of("UTC"))));
System.out.println("equals - ZoneId.of(\"UTC\").normalized(): " + nowZoneOffset
        .equals(now.withZoneSameInstant(ZoneId.of("UTC").normalized())));
System.out.println("equals - ZoneId.of(\"Z\"): " + nowZoneOffset
        .equals(now.withZoneSameInstant(ZoneId.of("Z"))));
System.out.println("equals - ZoneId.of(\"+0\"): " + nowZoneOffset
        .equals(now.withZoneSameInstant(ZoneId.of("+0"))));
System.out.println("isEqual - ZoneId.of(\"UTC\"): "+ nowZoneOffset
        .isEqual(now.withZoneSameInstant(ZoneId.of("UTC"))));

Output:

equals - ZoneId.of("UTC"): false
equals - ZoneId.of("UTC").normalized(): true
equals - ZoneId.of("Z"): true
equals - ZoneId.of("+0"): true
isEqual - ZoneId.of("UTC"): true

If this is your code, the correct solution is to rewrite it to not use Session(), since that's no longer necessary in TensorFlow 2

If this is just code you're running, you can downgrade to TensorFlow 1 by running

pip3 install --upgrade --force-reinstall tensorflow-gpu==1.15.0 

(or whatever the latest version of TensorFlow 1 is)

Believe it or not, renaming LinqPad.exe.config to LinqPad.config solved this problem.

If you're looking to get promise in resource call, you should use

Regions.query().$q.then(function(){ .... })

Update : the promise syntax is changed in current versions which reads

Regions.query().$promise.then(function(){ ..... })

Those who have downvoted don't know what it was and who first added this promise to resource object. I used this feature in late 2012 - yes 2012.

I had a lot of trouble with this also. I still don't fully understand the permission and root run, but this worked for me (one of the previous answers partly) to copy database file from /data/data/[package name]/databases/my_db.db . Running shell root, or su in shell for some reason didn't work, nor did copying the db file (I could navigate to the directory though), nor did sqlite3.

So, this worked! In DOS command prompt:

C:\Program Files\Android\android-sdk\platform-tools>adb shell
1|shell@android:/ $ run-as de.vogella.android.locationapi.maps
run-as de.vogella.android.locationapi.maps
1|shell@android:/data/data/de.vogella.android.locationapi.maps $ cd /data
cd /data
shell@android:/data $ cd data
cd data
shell@android:/data/data $ cd de.vogella.android.locationapi.maps
cd de.vogella.android.locationapi.maps
shell@android:/data/data/de.vogella.android.locationapi.maps $ cd databases
cd databases
shell@android:/data/data/de.vogella.android.locationapi.maps/databases $ ls
ls
bus_timetable_lines.db
bus_timetable_lines.db-journal
shell@android:/data/data/de.vogella.android.locationapi.maps/databases $ cat bus
_timetable_lines.db > /sdcard/db_copy.db
 bus_timetable_lines.db > /sdcard/db_copy.db                                   <
shell@android:/data/data/de.vogella.android.locationapi.maps/databases $exit   ^
exit
shell@android:/ $ exit
exit

C:\Program Files\Android\android-sdk\platform-tools>

Now go to SDCARD directory and get your file db_copy.db . Even that was hidden, but I managed to email it. Back in Windows, I was able to open db file with SQLite Database Browser. :)

You need to call the

$.parseJSON();

For example:

...
success: function(data){
       var json = $.parseJSON(data); // create an object with the key of the array
       alert(json.html); // where html is the key of array that you want, $response['html'] = "<a>something..</a>";
    },
    error: function(data){
       var json = $.parseJSON(data);
       alert(json.error);
    } ...

see this in http://api.jquery.com/jQuery.parseJSON/

if you still have the problem of slashes: search for security.magicquotes.disabling.php or: function.stripslashes.php

Note:

This answer here is for those who try to use $.ajax with the dataType property set to json and even that got the wrong response type. Defining the header('Content-type: application/json'); in the server may correct the problem, but if you are returning text/html or any other type, the $.ajax method should convert it to json. I make a test with older versions of jQuery and only after version 1.4.4 the $.ajax force to convert any content-type to the dataType passed. So if you have this problem, try to update your jQuery version.

The easiest might be:

Array(1, 2, 3) :+ 4

Actually, Array can be implcitly transformed in a WrappedArray

Something like this

 string find = "item_manuf_id = 'some value'";
 DataRow[] foundRows = table.Select(find);

You should look at the documentation for the Action method; it's explained well. For your case, this should work:

@Html.Action("GetOptions", new { pk="00", rk="00" });

The controllerName parameter will default to the controller from which Html.Action is being invoked. So if you're trying to invoke an action from another controller, you'll have to specify the controller name like so:

@Html.Action("GetOptions", "ControllerName", new { pk="00", rk="00" });

As shown in the above image, if the password is encrypted it is always a hidden secret where someone can extract the plain text password. However when password is hashed, you are relaxed as there is hardly any method of recovering the password from the hash value.

Extracted from Encrypted vs Hashed Passwords - Which is better?

Is encryption good?

Plain text passwords can be encrypted using symmetric encryption algorithms like DES, AES or with any other algorithms and be stored inside the database. At the authentication (confirming the identity with user name and password), application will decrypt the encrypted password stored in database and compare with user provided password for equality. In this type of an password handling approach, even if someone get access to database tables the passwords will not be simply reusable. However there is a bad news in this approach as well. If somehow someone obtain the cryptographic algorithm along with the key used by your application, he/she will be able to view all the user passwords stored in your database by decryption. "This is the best option I got", a software developer may scream, but is there a better way?

Cryptographic hash function (one-way-only)

Yes there is, may be you have missed the point here. Did you notice that there is no requirement to decrypt and compare? If there is one-way-only conversion approach where the password can be converted into some converted-word, but the reverse operation (generation of password from converted-word) is impossible. Now even if someone gets access to the database, there is no way that the passwords be reproduced or extracted using the converted-words. In this approach, there will be hardly anyway that some could know your users' top secret passwords; and this will protect the users using the same password across multiple applications. What algorithms can be used for this approach?

For some reasons, @ChintanSoni's answer didn't worked. I tried deleting the build folder manually but couldn't delete some files since they were being used by some process. Cleaning and re-building the project didn't help so I opened task manager, selected JAVA(TM) Platform SE binary and pressed on 'End task`.

Then I tried to run the project once again and it started compiling fine.

Unfortunately you can't animate the display property. For a full list of what you can animate, try this CSS animation list by w3 Schools.

If you want to retain it's visual position on the page, you should try animating either it's height (which will still affect the position of other elements), or opacity (how transparent it is). You could even try animating the z-index, which is the position on the z axis (depth), by putting an element over the top of it, and then rearranging what's on top. However, I'd suggest using opacity, as it retains the vertical space where the element is.

I've updated the fiddle to show an example.

Good luck!

Simply check if there is a protocol (delineated by "://") and add "http://" if there isn't.

if (false === strpos($url, '://')) {
    $url = 'http://' . $url;
}

Note: This may be a simple and straightforward solution, but Jack's answer using parse_url is almost as simple and much more robust. You should probably use that one.

@OP it doesn't matter, you can just split on a space with explode. Until you want to use those values, iterate over the exploded values and discard blanks.

$str = "A      B      C      D";
$s = explode(" ",$str);
foreach ($s as $a=>$b){    
    if ( trim($b) ) {
     print "using $b\n";
    }
}

SELECT * FROM table WHERE field1 NOT LIKE '%$x%'; (Make sure you escape $x properly beforehand to avoid SQL injection)

Edit: NOT IN does something a bit different - your question isn't totally clear so pick which one to use. LIKE 'xxx%' can use an index. LIKE '%xxx' or LIKE '%xxx%' can't.

the best way i found which also thinks of positive and negative numbers is from : O'Reilly Javascript and DHTML Cookbook :

function isNumber(elem) {
var str = elem.value;
var oneDecimal = false;
var oneChar = 0;
// make sure value hasn't cast to a number data type
str = str.toString( );
for (var i = 0; i < str.length; i++) {
    oneChar = str.charAt(i).charCodeAt(0);
    // OK for minus sign as first character
    if (oneChar =  = 45) {
        if (i =  = 0) {
            continue;
        } else {
            alert("Only the first character may be a minus sign.");
            return false;
        }
    }
    // OK for one decimal point
    if (oneChar =  = 46) {
        if (!oneDecimal) {
            oneDecimal = true;
            continue;
        } else {
            alert("Only one decimal is allowed in a number.");
            return false;
        }
    }
    // characters outside of 0 through 9 not OK
    if (oneChar < 48 || oneChar > 57) {
        alert("Enter only numbers into the field.");
        return false;
    }
}
return true;

}

An ORA-01722 error occurs when an attempt is made to convert a character string into a number, and the string cannot be converted into a number.

Without seeing your table definition, it looks like you're trying to convert the numeric sequence at the end of your values list to a number, and the spaces that delimit it are throwing this error. But based on the information you've given us, it could be happening on any field (other than the first one).

Thanks all for your help! Finally I used JQuery/AJAX as you suggested, passing the parameter using model.

So, in JS:

$('#divPoints').load('/Schedule/UpdatePoints', UpdatePointsAction);
var points= $('#newpoints').val();
$element.find('PointsDiv').html("You have" + points+ " points");

In Controller:

var model = _newPoints;
return PartialView(model);

In View

<div id="divPoints"></div>
@Html.Hidden("newpoints", Model)

Make sure you have downloaded Support Repository to use support library dependency in build.gradle.

If these all are there already installed sync your project with gradle once using the button available.

here, my solution is different from the above. i haven't figured out how this problem happen, but i fixed it. a little unexpectedly.

now comes way:

$ git push origin  use_local_cache_v1_x000D_
Everything up-to-date_x000D_
$ git status_x000D_
On branch test_x000D_
Your branch is ahead of 'origin/use_local_cache_v1' by 4 commits._x000D_
  (use "git push" to publish your local commits)_x000D_
  ......_x000D_
$ git push_x000D_
fatal: The upstream branch of your current branch does not match_x000D_
the name of your current branch.  To push to the upstream branch_x000D_
on the remote, use_x000D_
_x000D_
    git push origin HEAD:use_local_cache_v1_x000D_
_x000D_
To push to the branch of the same name on the remote, use_x000D_
_x000D_
    git push origin test_x000D_
    _x000D_
$ git push origin HEAD:use_local_cache_v1    _x000D_
Total 0 (delta 0), reused 0 (delta 0)_x000D_
remote:

the command that works for me is

$git push origin HEAD:use_local_cache

(hope you guys get out of this trouble as soon as possible)

A few comments:

1. Since the search position is important you should specify where you start the search. I use ws.[a1] and xlNext below so my search starts in A2 of the specified sheet.
2. Some of Finds arguments - including lookat use the prior search settings. So you should always specify xlWhole or xlPart to match all or part a string respectively.
3. You can do all you want - including inserting a row, and prompting the user for a new value (my code will suggest 20 if the prior value was 19) without using Select or Activate

suggested code

Sub FindEm()
Dim Wb As Workbook
Dim ws As Worksheet
Dim rng1 As Range
Set Wb = ThisWorkbook
Set ws = Wb.Sheets("ECM Overview")
Set rng1 = ws.Range("A:A").Find("ProjTemp", ws.[a1], xlValues, xlWhole, , xlNext)
If Not rng1 Is Nothing Then
rng1.EntireRow.Insert
rng1.Offset(-1, 0).Value = Application.InputBox("Please enter data", "User Data Entry", rng1.Offset(-2, 0) + 1, , , , , 1)
Else
MsgBox "ProjTemp not found", vbCritical
End If
End Sub

There are 2 inputs you might have and you can also convert between them.

1. input: listOfDictionaries --> use @VikashSingh solution

example: [{"":{"...

The pd.DataFrame() needs a listOfDictionaries as input.

2. input: jsonStr --> use @JustinMalinchak solution

example: '{"":{"...

If you have jsonStr, you need an extra step to listOfDictionaries first. This is obvious as it is generated like:

jsonStr = json.dumps(listOfDictionaries)

Thus, switch back from jsonStr to listOfDictionaries first:

listOfDictionaries = json.loads(jsonStr)

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 :)

Only use Redim statement

 Dim aFirstArray() As Variant

Redim aFirstArray(nRows,nColumns)

You can use the UNION ALL function http://blog.sqlauthority.com/2007/06/08/sql-server-insert-multiple-records-using-one-insert-statement-use-of-union-all/

MS SQL Studio take care of when you delete the column but if you need to Delete Constraint Programmatically here is simple solution

Here’s a code snippet that’ll drop a column with a default constraint:

DECLARE @ConstraintName nvarchar(200)
SELECT @ConstraintName = Name FROM SYS.DEFAULT_CONSTRAINTS WHERE PARENT_OBJECT_ID = OBJECT_ID('__TableName__') AND PARENT_COLUMN_ID = (SELECT column_id FROM sys.columns WHERE NAME = N'__ColumnName__' AND object_id = OBJECT_ID(N'__TableName__'))
IF @ConstraintName IS NOT NULL
EXEC('ALTER TABLE __TableName__ DROP CONSTRAINT ' + @ConstraintName)
IF EXISTS (SELECT * FROM syscolumns WHERE id=object_id('__TableName__') AND name='__ColumnName__')
EXEC('ALTER TABLE __TableName__ DROP COLUMN __ColumnName__')

Just replace TableName and ColumnName with the appropriate values. You can safely run this even if the column has already been dropped.

Bonus: Here’s the code to drop foreign keys and other types of constraints.

IF EXISTS(SELECT 1 FROM INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE where TABLE_NAME = '__TableName__' AND COLUMN_NAME = '__ColumnName__')
BEGIN
SELECT @ConstraintName = CONSTRAINT_NAME FROM INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE where TABLE_NAME = '__TableName__' AND COLUMN_NAME = '__ColumnName__'
EXEC('ALTER TABLE __TableName__ DROP CONSTRAINT ' + @ConstraintName)
END

Blog

 Select
     Count(Distinct user_id) As countUsers
   , Count(site_id) As countVisits
   , site_id As site
 From cp_visits
 Where ts >= DATE_SUB(NOW(), INTERVAL 1 DAY)
 Group By site_id

Just use parseInt() and be sure to include the radix so you get predictable results:

parseInt(d, 10);

For calculating days in two dates difference, can be done like below:

import datetime
import math

issuedate = datetime(2019,5,9)   #calculate the issue datetime
current_date = datetime.datetime.now() #calculate the current datetime
diff_date = current_date - issuedate #//calculate the date difference with time also
amount = fine  #you want change

if diff_date.total_seconds() > 0.0:   #its matching your condition
    days = math.ceil(diff_date.total_seconds()/86400)  #calculate days (in 
    one day 86400 seconds)
    deductable_amount = round(amount,2)*days #calclulated fine for all days

Becuase if one second is more with the due date then we have to charge

Some of the data processing requirements doesn't need sort at all. Syncsort had made the sorting in Hadoop pluggable. Here is a nice blog from them on sorting. The process of moving the data from the mappers to the reducers is called shuffling, check this article for more information on the same.

A quick search of the docs for the ListView class has turned up getChildCount() and getChildAt() methods inherited from ViewGroup. Can you iterate through them using these? I'm not sure but it's worth a try.

Found it here

I wanted to give some kudos to the comment that mentioned CTRL + Z as an option. At the end of the day, it's going to depend on what system that you have Git installed on and what program is configured to open text files (e.g. less vs. vim). CTRL + Z works for vim on Windows.

If you're using Git in a Windows environment, there are some quirks. Just helps to know what they are. (i.e. Notepad vs. Nano, etc.).

It sounds like you might need to create and query linked database servers in SQL Server

At the moment you've created a query that's going between different databases using a 3 part name mydatabase.dbo.mytable but you need to go up a level and use a 4 part name myserver.mydatabase.dbo.mytable, see this post on four part naming for more info

edit
The four part naming for your existing query would be as shown below (which I suspect you may have already tried?), but this assumes you can "get to" the remote database with the four part name, you might need to edit your host file / register the server or otherwise identify where to find database.windows.net.

INSERT INTO [DATABASE.WINDOWS.NET].[basecampdev].[dbo].[invoice]
       ([InvoiceNumber]
       ,[TotalAmount]
       ,[IsActive]
       ,[CreatedBy]
       ,[UpdatedBy]
       ,[CreatedDate]
       ,[UpdatedDate]
       ,[Remarks])
SELECT [InvoiceNumber]
       ,[TotalAmount]
       ,[IsActive]
       ,[CreatedBy]
       ,[UpdatedBy]
       ,[CreatedDate]
       ,[UpdatedDate]
       ,[Remarks] FROM [BC1-PC].[testdabse].[dbo].[invoice]

If you can't access the remote server then see if you can create a linked database server:

EXEC sp_addlinkedserver [database.windows.net];
GO
USE tempdb;
GO
CREATE SYNONYM MyInvoice FOR 
    [database.windows.net].basecampdev.dbo.invoice;
GO

Then you can just query against MyEmployee without needing the full four part name

TL;DR: add the parameter cursorclass=MySQLdb.cursors.DictCursor at the end of your MySQLdb.connect.

I had a working code and the DB moved, I had to change the host/user/pass. After this change, my code stopped working and I started getting this error. Upon closer inspection, I copy-pasted the connection string on a place that had an extra directive. The old code read like:

 conn = MySQLdb.connect(host="oldhost",
                        user="olduser",
                        passwd="oldpass",
                        db="olddb", 
                        cursorclass=MySQLdb.cursors.DictCursor)

Which was replaced by:

 conn = MySQLdb.connect(host="newhost",
                        user="newuser",
                        passwd="newpass",
                        db="newdb")

The parameter cursorclass=MySQLdb.cursors.DictCursor at the end was making python allow me to access the rows using the column names as index. But the poor copy-paste eliminated that, yielding the error.

So, as an alternative to the solutions already presented, you can also add this parameter and access the rows in the way you originally wanted. ^_^ I hope this helps others.

This error means that, while linking, compiler is not able to find the definition of main() function anywhere.

In your makefile, the main rule will expand to something like this.

main: producer.o consumer.o AddRemove.o
   gcc -pthread -Wall -o producer.o consumer.o AddRemove.o

As per the gcc manual page, the use of -o switch is as below

-o file     Place output in file file. This applies regardless to whatever sort of output is being produced, whether it be an executable file, an object file, an assembler file or preprocessed C code. If -o is not specified, the default is to put an executable file in a.out.

It means, gcc will put the output in the filename provided immediate next to -o switch. So, here instead of linking all the .o files together and creating the binary [main, in your case], its creating the binary as producer.o, linking the other .o files. Please correct that.

you can check docker state using: systemctl is-active docker

?  ~  systemctl is-active docker
active

you can use it as:

?  ~  if [ "$(systemctl is-active docker)" = "active" ]; then echo "is alive :)" ; fi
is alive :)

?  ~  sudo systemctl stop docker

?  ~  if [ "$(systemctl is-active docker)" = "active" ]; then echo "is alive :)" ; fi
 * empty response *

Take a look to SimpleDateFormat class that can parse a String and return a Date and the getTime method of Date class.

You can't do it as a simple single query, but this would do:

select title
from kmovies
where title in (
    select title
    from kmovies
    group by title
    order by cnt desc
    having count(title) > 1
)

Try getting hold of a URL for your classpath resource:

URL url = this.getClass().getResource("/com/path/to/file.txt")

Then create a file using the constructor that accepts a URI:

File file = new File(url.toURI());

I have also researched lot on this, but I could not get the concrete solution for this. Currently the approach I follow is copy the contents in excel from SQL Server Managment studio and then import the data into Oracle-TOAD and then generate the insert statements

I modified the code of the accepted answer and added a keyword max_depth to only flatten up to a specified depth. max_depth=0 means, the list stays as it is. Maybe somebody can use it:

def flatten(l, __depth=0, max_depth=100):

    for el in l:

        if isinstance(el, collections.Iterable) and not isinstance(el, (str, bytes)):

            __depth += 1
            if __depth <= max_depth:
                yield from flatten(el, __depth=__depth, max_depth=max_depth)
            else:
                yield el
            __depth -= 1

        else:

            yield el

Some examples:

# A
l = []
depth = 5
for i in range(depth):
    el = i
    for j in range(i):
        el = [el]
    l.append(el)
# [0, [1], [[2]], [[[3]]], [[[[4]]]]]

for i in range(depth):
    print(list(flatten_gen(l, max_depth=i)))
# [0, [1], [[2]], [[[3]]], [[[[4]]]]]
# [0,  1,   [2],   [[3]],   [[[4]]]]
# [0,  1,    2,     [3],     [[4]]]
# [0,  1,    2,      3,       [4]]
# [0,  1,    2,      3,        4]


# B
l = [[1, 2], [3, 4, [5, 6, [7, [8, [9]]], 10], 12, [13]], 14, [15]]

for i in range(6):
    print(list(flatten_gen(l, max_depth=i)))
# [[1, 2], [3, 4, [5, 6, [7, [8, [9]]], 10], 12, [13]], 14, [15]]
# [ 1, 2,   3, 4, [5, 6, [7, [8, [9]]], 10], 12, [13],  14,  15]
# [ 1, 2,   3, 4,  5, 6, [7, [8, [9]]], 10,  12,  13,   14,  15]
# [ 1, 2,   3, 4,  5, 6,  7, [8, [9]],  10,  12,  13,   14,  15]
# [ 1, 2,   3, 4,  5, 6,  7,  8, [9],   10,  12,  13,   14,  15]
# [ 1, 2,   3, 4,  5, 6,  7,  8,  9,    10,  12,  13,   14,  15]

There is an experimental webkit property called text-stroke in CSS3, I've been trying to get this to work for some time but have been unsuccessful so far.

What I have done instead is used the already supported text-shadow property (supported in Chrome, Firefox, Opera, and IE 9 I believe).

Use four shadows to simulate a stroked text:

.strokeme {_x000D_
  color: white;_x000D_
  text-shadow: -1px -1px 0 #000, 1px -1px 0 #000, -1px 1px 0 #000, 1px 1px 0 #000;_x000D_
}

<div class="strokeme">_x000D_
  This text should have a stroke in some browsers_x000D_
</div>

I have made a demo for you here

And a hovered example is available here

As Jason C has mentioned in the comments, the text-shadow CSS property is now supported by all major browsers, with the exception of Opera Mini. Where this solution will work for backwards compatibility (not really an issue regarding browsers that auto-update) I believe the text-stroke CSS should be used.

Brief code but full-featured

The following is a hybrid jQuery solution that formats each data "record" into an HTML element and uses the data's properties as HTML attribute values.

The jquery each runs the inner loop; I needed the regular JavaScript for on the outer loop to be able to grab the property name (instead of value) for display as the heading. According to taste it can be modified for slightly different behaviour.

This is only 5 main lines of code but wrapped onto multiple lines for display:

$.get("data.php", function(data){

    for (var propTitle in data) {

        $('<div></div>') 
            .addClass('heading')
            .insertBefore('#contentHere')
            .text(propTitle);

            $(data[propTitle]).each(function(iRec, oRec) {

                $('<div></div>')
                    .addClass(oRec.textType)
                    .attr('id', 'T'+oRec.textId)
                    .insertBefore('#contentHere')
                    .text(oRec.text);
            });
    }

});

Produces the output

(Note: I modified the JSON data text values by prepending a number to ensure I was displaying the proper records in the proper sequence - while "debugging")

<div class="heading">
    justIn
</div>
<div id="T123" class="Greeting">
    1Hello
</div>
<div id="T514" class="Question">
    1What's up?
</div>
<div id="T122" class="Order">
    1Come over here
</div>
<div class="heading">
    recent
</div>
<div id="T1255" class="Greeting">
    2Hello
</div>
<div id="T6564" class="Question">
    2What's up?
</div>
<div id="T0192" class="Order">
    2Come over here
</div>
<div class="heading">
    old
</div>
<div id="T5213" class="Greeting">
    3Hello
</div>
<div id="T9758" class="Question">
    3What's up?
</div>
<div id="T7655" class="Order">
    3Come over here
</div>
<div id="contentHere"></div>

Apply a style sheet

<style>
.heading { font-size: 24px; text-decoration:underline }
.Greeting { color: green; }
.Question { color: blue; }
.Order { color: red; }
</style>

to get a "beautiful" looking set of data

More Info
The JSON data was used in the following way:

for each category (key name the array is held under):

• the key name is used as the section heading (e.g. justIn)

for each object held inside an array:

• 'text' becomes the content of a div
• 'textType' becomes the class of the div (hooked into a style sheet)
• 'textId' becomes the id of the div
• e.g. <div id="T122" class="Order">Come over here</div>

Immutable Object's state cannot be altered.

for example String.

String str= "abc";//a object of string is created
str  = str + "def";// a new object of string is created and assigned to str

You are describing a function, not a class.

def Myclass():
    return []

First you'll need to get it into a byte[], so do this:

byte[] ba = Encoding.Default.GetBytes("sample");

and then you can get the string:

var hexString = BitConverter.ToString(ba);

now, that's going to return a string with dashes (-) in it so you can then simply use this:

hexString = hexString.Replace("-", "");

to get rid of those if you want.

NOTE: you could use a different Encoding if you needed to.

this will set your session to keep everything till the browser is closed

session.setMaxinactiveinterval(-1);

and this should set it for 1 day

session.setMaxInactiveInterval(60*60*24);

It is also very important to distinguish a SENDING multicast socket from a RECEIVING multicast socket.

I agree with all the answers above regarding RECEIVING multicast sockets. The OP noted that binding a RECEIVING socket to an interface did not help. However, it is necessary to bind a multicast SENDING socket to an interface.

For a SENDING multicast socket on a multi-homed server, it is very important to create a separate socket for each interface you want to send to. A bound SENDING socket should be created for each interface.

  // This is a fix for that bug that causes Servers to pop offline/online.
  // Servers will intermittently pop offline/online for 10 seconds or so.
  // The bug only happens if the machine had a DHCP gateway, and the gateway is no longer accessible.
  // After several minutes, the route to the DHCP gateway may timeout, at which
  // point the pingponging stops.
  // You need 3 machines, Client machine, server A, and server B
  // Client has both ethernets connected, and both ethernets receiving CITP pings (machine A pinging to en0, machine B pinging to en1)
  // Now turn off the ping from machine B (en1), but leave the network connected.
  // You will notice that the machine transmitting on the interface with
  // the DHCP gateway will fail sendto() with errno 'No route to host'
  if ( theErr == 0 )
  {
     // inspired by 'ping -b' option in man page:      
     //      -b boundif
     //             Bind the socket to interface boundif for sending.
     struct sockaddr_in bindInterfaceAddr;
     bzero(&bindInterfaceAddr, sizeof(bindInterfaceAddr));
     bindInterfaceAddr.sin_len = sizeof(bindInterfaceAddr);
     bindInterfaceAddr.sin_family = AF_INET;
     bindInterfaceAddr.sin_addr.s_addr = htonl(interfaceipaddr);
     bindInterfaceAddr.sin_port = 0; // Allow the kernel to choose a random port number by passing in 0 for the port.
     theErr = bind(mSendSocketID, (struct sockaddr *)&bindInterfaceAddr, sizeof(bindInterfaceAddr));
     struct sockaddr_in serverAddress;
     int namelen = sizeof(serverAddress);  
     if (getsockname(mSendSocketID, (struct sockaddr *)&serverAddress, (socklen_t *)&namelen) < 0) {
        DLogErr(@"ERROR Publishing service... getsockname err");
     }
     else
     {
        DLog( @"socket %d bind, %@ port %d", mSendSocketID, [NSString stringFromIPAddress:htonl(serverAddress.sin_addr.s_addr)], htons(serverAddress.sin_port) );
     }

Without this fix, multicast sending will intermittently get sendto() errno 'No route to host'. If anyone can shed light on why unplugging a DHCP gateway causes Mac OS X multicast SENDING sockets to get confused, I would love to hear it.

just press the back button and then next button...jdk found :D

Below code work for me in web.xml file

<servlet>
    <servlet-name>WebService</servlet-name>
    <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
    <init-param>
        <param-name>jersey.config.server.provider.packages</param-name>
        <param-value>com.example.demo.webservice</param-value>
        //Package
    </init-param>
    <init-param>
        <param-name>unit:WidgetPU</param-name>
        <param-value>persistence/widget</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>WebService</servlet-name>
    <url-pattern>/webservices/*</url-pattern>
</servlet-mapping>

Update Nov. 2015: As per Hans Z. below - this is now indeed defined as part of RFC 7662.

Original Answer: The OAuth 2.0 spec (RFC 6749) doesn't clearly define the interaction between a Resource Server (RS) and Authorization Server (AS) for access token (AT) validation. It really depends on the AS's token format/strategy - some tokens are self-contained (like JSON Web Tokens) while others may be similar to a session cookie in that they just reference information held server side back at the AS.

There has been some discussion in the OAuth Working Group about creating a standard way for an RS to communicate with the AS for AT validation. My company (Ping Identity) has come up with one such approach for our commercial OAuth AS (PingFederate): https://support.pingidentity.com/s/document-item?bundleId=pingfederate-93&topicId=lzn1564003025072.html#lzn1564003025072__section_N10578_N1002A_N10001. It uses REST based interaction for this that is very complementary to OAuth 2.0.

You can Also use this online tool to customize your button http://angrytools.com/android/button/ and use android:background="@drawable/custom_btn" to define the customized button in your layout.

this function will join 2 tables with a known join field, but this cannot allow 2 fields with the same name on both tables except the join field, a simple modification would be to save a dictionary with a counter and just add number to the same name filds.

public static DataTable JoinDataTable(DataTable dataTable1, DataTable dataTable2, string joinField)
{
    var dt = new DataTable();
    var joinTable = from t1 in dataTable1.AsEnumerable()
                            join t2 in dataTable2.AsEnumerable()
                                on t1[joinField] equals t2[joinField]
                            select new { t1, t2 };

    foreach (DataColumn col in dataTable1.Columns)
        dt.Columns.Add(col.ColumnName, typeof(string));

    dt.Columns.Remove(joinField);

    foreach (DataColumn col in dataTable2.Columns)
        dt.Columns.Add(col.ColumnName, typeof(string));

    foreach (var row in joinTable)
    {
        var newRow = dt.NewRow();
        newRow.ItemArray = row.t1.ItemArray.Union(row.t2.ItemArray).ToArray();
        dt.Rows.Add(newRow);
    }
    return dt;
}

The extension of the file does not matter to most C compilers, so it will work.

However, depending on your makefile or project settings the included c file might generate a separate object file. When linking that might lead to double defined symbols.

Take a look at section 9.2.: Maven Properties of the free online book Maven: The Complete Reference.

myprocess.out & would run the process in background using a subshell. If the current shell is terminated (say by logout), all subshells are also terminated so the background process would also be terminated. The nohup command ignores the HUP signal and thus even if the current shell is terminated, the subshell and myprocess.out would continue to run in the background. Another difference is that & alone doesn't redirect the stdout/stderr so if there are any output or error, those are displayed on the terminal. nohup on the other hand redirect the stdout/stderr to nohup.out or $HOME/nohup.out.

select cast (height as decimal)/10 as HeightDecimal

You are looking for --build-arg and the ARG instruction. These are new as of Docker 1.9. Check out https://docs.docker.com/engine/reference/builder/#arg. This will allow you to add ARG arg to the Dockerfile and then build with docker build --build-arg arg=2.3 ..

For those without LINQ:

RadioButton GetCheckedRadio(Control container)
{
    foreach (var control in container.Controls)
    {
        RadioButton radio = control as RadioButton;

        if (radio != null && radio.Checked)
        {
            return radio;
        }
    }

    return null;
}

There's time.ParseDuration which will happily accept negative durations, as per manual. Otherwise put, there's no need to negate a duration where you can get an exact duration in the first place.

E.g. when you need to substract an hour and a half, you can do that like so:

package main

import (
    "fmt"
    "time"
)

func main() {
    now := time.Now()

    fmt.Println("now:", now)

    duration, _ := time.ParseDuration("-1.5h")

    then := now.Add(duration)

    fmt.Println("then:", then)
}

https://play.golang.org/p/63p-T9uFcZo

To know the package owning (or providing) an already installed file:

rpm -qf myfilename

There are some great examples in here, but I couldn't get this to work in all cases when also dealing with multiple lines of text (text wrapping). To finally get it to work I combined a couple of the techniques:

1. I used Jesse Crossen example above. However, I fixed a text height issue and I added the ability to specify a horizontal text margin. The margin is useful when allowing text to wrap so it doesn't hit the edge of the button:

   // the space between the image and text
   CGFloat spacing = 10.0;
   float   textMargin = 6;
   
   // get the size of the elements here for readability
   CGSize  imageSize   = picImage.size;
   CGSize  titleSize   = button.titleLabel.frame.size;
   CGFloat totalHeight = (imageSize.height + titleSize.height + spacing);      // get the height they will take up as a unit
   
   // lower the text and push it left to center it
   button.titleEdgeInsets = UIEdgeInsetsMake( 0.0, -imageSize.width +textMargin, - (totalHeight - titleSize.height), +textMargin );   // top, left, bottom, right
   
   // the text width might have changed (in case it was shortened before due to 
   // lack of space and isn't anymore now), so we get the frame size again
   titleSize = button.titleLabel.bounds.size;
   
   button.imageEdgeInsets = UIEdgeInsetsMake(-(titleSize.height + spacing), 0.0, 0.0, -titleSize.width );     // top, left, bottom, right        
   

2. Make sure you setup the text label to wrap

   button.titleLabel.numberOfLines = 2; 
   button.titleLabel.lineBreakMode = UILineBreakModeWordWrap;
   button.titleLabel.textAlignment = UITextAlignmentCenter;
   

3. This will mostly work now. However, I had some buttons that wouldn't render their image correctly. The image was either shifted to far to the right or left (it wasn't centered). So I used an UIButton layout override technique to force the imageView to be centered.

   @interface CategoryButton : UIButton
   @end
   
   @implementation CategoryButton
   
   - (void)layoutSubviews
   {
       // Allow default layout, then center imageView
       [super layoutSubviews];
   
       UIImageView *imageView = [self imageView];
       CGRect imageFrame = imageView.frame;
       imageFrame.origin.x = (int)((self.frame.size.width - imageFrame.size.width)/ 2);
       imageView.frame = imageFrame;
   }
   @end
   

If you want to get the latest changes in a directory without entering it, you can do:

$ git -C <Path to directory> pull

I would all but guarantee that the issue is some sort of non-printing character that's present in the value you pulled off your socket. It looks like you're using Python 2.x, in which case you can check for them with this:

print repr(temp)

You'll likely see something in there that's escaped in the form \x00. These non-printing characters don't show up when you print directly to the console, but their presence is enough to negatively impact the parsing of a string value into a float.

-- Edited for question changes --

It turns this is partly accurate for your issue - the root cause however appears to be that you're reading more information than you expect from your socket or otherwise receiving multiple values. You could do something like

map(float, temp.strip().split('\r\n'))

In order to convert each of the values, but if your function is supposed to return a single float value this is likely to cause confusion. Anyway, the issue certainly revolves around the presence of characters you did not expect to see in the value you retrieved from your socket.

I always had problems with that, and I made a getx.bat script:

:: getx %envvar% [\m]
:: Reads envvar from user environment variable and stores it in the getxvalue variable
:: with \m read system environment

@SETLOCAL EnableDelayedExpansion
@echo OFF

@set l_regpath="HKEY_CURRENT_USER\Environment"
@if "\m"=="%2" set l_regpath="HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment"

::REG ADD "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment" /v PATH /t REG_SZ /f /d "%PATH%"
::@REG QUERY %l_regpath% /v %1 /S

@FOR /F "tokens=*" %%A IN ('REG QUERY %l_regpath% /v %1 /S') DO (
@  set l_a=%%A
@    if NOT "!l_a!"=="!l_a:    =!" set l_line=!l_a!
)

:: Delimiter is four spaces. Change it to tab \t
@set l_line=!l_line!
@set l_line=%l_line:    =    %

@set getxvalue=

@FOR /F "tokens=3* delims=  " %%A IN ("%l_line%") DO (
@    set getxvalue=%%A
)
@set getxvalue=!getxvalue!
@echo %getxvalue% > getxfile.tmp.txt
@ENDLOCAL

:: We already used tab as a delimiter
@FOR /F "delims=    " %%A IN (getxfile.tmp.txt) DO (
    @set getxvalue=%%A
)
@del getxfile.tmp.txt

@echo ON

If you want to pause then use java.util.concurrent.TimeUnit:

TimeUnit.SECONDS.sleep(1);

To sleep for one second or

TimeUnit.MINUTES.sleep(1);

To sleep for a minute.

As this is a loop, this presents an inherent problem - drift. Every time you run code and then sleep you will be drifting a little bit from running, say, every second. If this is an issue then don't use sleep.

Further, sleep isn't very flexible when it comes to control.

For running a task every second or at a one second delay I would strongly recommend a ScheduledExecutorService and either scheduleAtFixedRate or scheduleWithFixedDelay.

For example, to run the method myTask every second (Java 8):

public static void main(String[] args) {
    final ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor();
    executorService.scheduleAtFixedRate(App::myTask, 0, 1, TimeUnit.SECONDS);
}

private static void myTask() {
    System.out.println("Running");
}

And in Java 7:

public static void main(String[] args) {
    final ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor();
    executorService.scheduleAtFixedRate(new Runnable() {
        @Override
        public void run() {
            myTask();
        }
    }, 0, 1, TimeUnit.SECONDS);
}

private static void myTask() {
    System.out.println("Running");
}

Using -engine specific rules ensures effective browser targeting.

<style type="text/css">

    //Other browsers
    color : black;


    //Webkit (Chrome, Safari)
    @media screen and (-webkit-min-device-pixel-ratio:0) { 
        color:green;
    }

    //Firefox
    @media screen and (-moz-images-in-menus:0) {
        color:orange;
    }
</style>

//Internet Explorer
<!--[if IE]>
     <style type='text/css'>
        color:blue;
    </style>
<![endif]-->

Make sure that your IntelliJ Idea (IDE) is aware of all the necessary spring configurations that your module is being inspected against.

You can check this under

File > Project Structure > Modules > [your project name in the right panel] > Spring

Sometimes, we need to explicitly tell the IDE that the spring configuration is coming from a dependency (a jar present in your project classpath)

parseInt is misfeatured like scanf:

parseInt("12 monkeys", 10) is a number with value '12'
+"12 monkeys"              is a number with value 'NaN'
Number("12 monkeys")       is a number with value 'NaN'

I was searching for something like this, because I've got to check which of all my selects are disabled.

So I use this:

let select= $("select");

for (let i = 0; i < select.length; i++) {
    const element = select[i];
    if(element.disabled == true ){
        console.log(element)
    }
}

Case 1: I was getting this exception when I was trying to create a parent and saving that parent reference to its child and then some other DELETE/UPDATE query(JPQL). So I just flush() the newly created entity after creating parent and after creating child using same parent reference. It Worked for me.

Case 2:

Parent class

public class Reference implements Serializable {

    @Id
    @Column(precision=20, scale=0)
    private BigInteger id;

    @Temporal(TemporalType.TIMESTAMP)
    private Date modifiedOn;

    @OneToOne(mappedBy="reference")
    private ReferenceAdditionalDetails refAddDetails;
    . 
    .
    .
}

Child Class:

public class ReferenceAdditionalDetails implements Serializable{

    private static final long serialVersionUID = 1L;

    @Id
    @OneToOne
    @JoinColumn(name="reference",referencedColumnName="id")
    private Reference reference;

    private String preferedSector1;
    private String preferedSector2;
    .
    .

}

In the above case where parent(Reference) and child(ReferenceAdditionalDetails) having OneToOne relationship and when you try to create Reference entity and then its child(ReferenceAdditionalDetails), it will give you the same exception. So to avoid the exception you have to set null for child class and then create the parent.(Sample Code)

.
.
reference.setRefAddDetails(null);
reference = referenceDao.create(reference);
entityManager.flush();
.
.

Also you can try to use

display:inline-block;

if you would like the span element to align horizontally.

Incase you would like to align span elements vertically, just use

 display:block;

As others have noted, getting the hostname based on DNS resolution is unreliable.

Since this question is unfortunately still relevant in 2018, I'd like to share with you my network-independent solution, with some test runs on different systems.

The following code tries to do the following:

• On Windows

  1. Read the COMPUTERNAME environment variable through System.getenv().

  2. Execute hostname.exe and read the response

• On Linux

  1. Read the HOSTNAME environment variable through System.getenv()

  2. Execute hostname and read the response

  3. Read /etc/hostname (to do this I'm executing cat since the snippet already contains code to execute and read. Simply reading the file would be better, though).

The code:

public static void main(String[] args) throws IOException {
    String os = System.getProperty("os.name").toLowerCase();

    if (os.contains("win")) {
        System.out.println("Windows computer name through env:\"" + System.getenv("COMPUTERNAME") + "\"");
        System.out.println("Windows computer name through exec:\"" + execReadToString("hostname") + "\"");
    } else if (os.contains("nix") || os.contains("nux") || os.contains("mac os x")) {
        System.out.println("Unix-like computer name through env:\"" + System.getenv("HOSTNAME") + "\"");
        System.out.println("Unix-like computer name through exec:\"" + execReadToString("hostname") + "\"");
        System.out.println("Unix-like computer name through /etc/hostname:\"" + execReadToString("cat /etc/hostname") + "\"");
    }
}

public static String execReadToString(String execCommand) throws IOException {
    try (Scanner s = new Scanner(Runtime.getRuntime().exec(execCommand).getInputStream()).useDelimiter("\\A")) {
        return s.hasNext() ? s.next() : "";
    }
}

Results for different operating systems:

macOS 10.13.2

Unix-like computer name through env:"null"
Unix-like computer name through exec:"machinename
"
Unix-like computer name through /etc/hostname:""

OpenSuse 13.1

Unix-like computer name through env:"machinename"
Unix-like computer name through exec:"machinename
"
Unix-like computer name through /etc/hostname:""

Ubuntu 14.04 LTS This one is kinda strange since echo $HOSTNAME returns the correct hostname, but System.getenv("HOSTNAME") does not:

Unix-like computer name through env:"null"
Unix-like computer name through exec:"machinename
"
Unix-like computer name through /etc/hostname:"machinename
"

EDIT: According to legolas108, System.getenv("HOSTNAME") works on Ubuntu 14.04 if you run export HOSTNAME before executing the Java code.

Windows 7

Windows computer name through env:"MACHINENAME"
Windows computer name through exec:"machinename
"

Windows 10

Windows computer name through env:"MACHINENAME"
Windows computer name through exec:"machinename
"

The machine names have been replaced but I kept the capitalization and structure. Note the extra newline when executing hostname, you might have to take it into account in some cases.

In Firefox at least, the DOM inspector is telling me that the File input elements have a property called files. You should be able to check its length.

document.getElementById('myFileInput').files.length

Basically below code line is only useful in data binding scenarios

datagridview.DataSource = null; 

otherwise below is the used when no data binding and datagridview is populated manually

dataGridView1.Rows.Clear();
dataGridView1.Refresh();

So, check first what you are doing.

GSON has a builder that takes a Reader object: fromJson(Reader json, Class classOfT).

This means you can create a Reader from a URL and then pass it to Gson to consume the stream and do the deserialisation.

Only three lines of relevant code.

import java.io.InputStreamReader;
import java.net.URL;
import java.util.Map;

import com.google.gson.Gson;

public class GsonFetchNetworkJson {

    public static void main(String[] ignored) throws Exception {

        URL url = new URL("https://httpbin.org/get?color=red&shape=oval");
        InputStreamReader reader = new InputStreamReader(url.openStream());
        MyDto dto = new Gson().fromJson(reader, MyDto.class);

        // using the deserialized object
        System.out.println(dto.headers);
        System.out.println(dto.args);
        System.out.println(dto.origin);
        System.out.println(dto.url);
    }

    private class MyDto {
        Map<String, String> headers;
        Map<String, String> args;
        String origin;
        String url;
    }
}

^{If you happen to get a 403 error code with an endpoint which otherwise works fine (e.g. with curl or other clients) then a possible cause could be that the endpoint expects a User-Agent header and by default Java URLConnection is not setting it. An easy fix is to add at the top of the file e.g. System.setProperty("http.agent", "Netscape 1.0");.}

There is the Importing a repository with GitHub Importer

If you have a project hosted on another version control system as Mercurial, you can automatically import it to GitHub using the GitHub Importer tool.

1. In the upper-right corner of any page, click , and then click Import repository.
2. Under "Your old repository's clone URL", type the URL of the project you want to import.
3. Choose your user account or an organization to own the repository, then type a name for the repository on GitHub.
4. Specify whether the new repository should be public or private.
   • Public repositories are visible to any user on GitHub, so you can benefit from GitHub's collaborative community.
   • Public or private repository radio buttonsPrivate repositories are only available to the repository owner, as well as any collaborators you choose to share with.
5. Review the information you entered, then click Begin import.

You'll receive an email when the repository has been completely imported.

1. https://help.github.com/categories/importing-your-projects-to-github
2. https://help.github.com/articles/importing-a-repository-with-github-importer/

Though it's probably suggested to get some heavier validation via JS or on the server, HTML5 does support this via the pattern attribute.

<input type= "text" name= "name" pattern= "[0-9]"  title= "Title"/>

Maybe I write this too late, but I have gotten the similar problem when I have tried to override methods for reading properties.

My problem have been: 1) Read property from env if this property has been set in env 2) Read property from system property if this property have been setted in system property 3) And last, read from application properties.

So, for resolving this problem I go to my bean configuration class

@Validated
@Configuration
@ConfigurationProperties(prefix = ApplicationConfiguration.PREFIX)
@PropertySource(value = "${application.properties.path}", factory = PropertySourceFactoryCustom.class)
@Data // lombok
public class ApplicationConfiguration {

    static final String PREFIX = "application";

    @NotBlank
    private String keysPath;

    @NotBlank
    private String publicKeyName;

    @NotNull
    private Long tokenTimeout;

    private Boolean devMode;

    public void setKeysPath(String keysPath) {
        this.keysPath = StringUtils.cleanPath(keysPath);
    }
}

And overwrite factory in @PropertySource. And then I have created my own implementation for reading properties.

    public class PropertySourceFactoryCustom implements PropertySourceFactory {

        @Override
        public PropertySource<?> createPropertySource(String name, EncodedResource resource) throws IOException {
            return name != null ? new PropertySourceCustom(name, resource) : new PropertySourceCustom(resource);
        }


    }

And created PropertySourceCustom

public class PropertySourceCustom extends ResourcePropertySource {


    public LifeSourcePropertySource(String name, EncodedResource resource) throws IOException {
        super(name, resource);
    }

    public LifeSourcePropertySource(EncodedResource resource) throws IOException {
        super(resource);
    }

    public LifeSourcePropertySource(String name, Resource resource) throws IOException {
        super(name, resource);
    }

    public LifeSourcePropertySource(Resource resource) throws IOException {
        super(resource);
    }

    public LifeSourcePropertySource(String name, String location, ClassLoader classLoader) throws IOException {
        super(name, location, classLoader);
    }

    public LifeSourcePropertySource(String location, ClassLoader classLoader) throws IOException {
        super(location, classLoader);
    }

    public LifeSourcePropertySource(String name, String location) throws IOException {
        super(name, location);
    }

    public LifeSourcePropertySource(String location) throws IOException {
        super(location);
    }

    @Override
    public Object getProperty(String name) {

        if (StringUtils.isNotBlank(System.getenv(name)))
            return System.getenv(name);

        if (StringUtils.isNotBlank(System.getProperty(name)))
            return System.getProperty(name);

        return super.getProperty(name);
    }
}

So, this has helped me.

I was trying to follow the flow described here - but haven't luck to completely kill the session.. Then I fond additional step here:
http://wyding.blogspot.com/2013/08/solution-for-ora-01940-cannot-drop-user.html

What I did:
1. select 'alter system kill session ''' || sid || ',' || serial# || ''';' from v$session where username = '<your_schema>'; - as described below.
Out put will be something like this:
alter system kill session '22,15' immediate;
2. alter system disconnect session '22,15' IMMEDIATE ; - 22-sid, 15-serial - repeat the command for each returned session from previous command
3. Repeat steps 1-2 while select... not return an empty table
4. Call drop user...

What was missed - call alter system disconnect session '22,15' IMMEDIATE ; for each of session returned by select 'alter system kill session '..

Open taskHistory.bin and search for storePassword

The other answers are helpful, but the JSON in your question isn't valid. I have formatted it to make it clearer below, note the missing single quote on line 24.

  1 {
  2     'Orientation Sensor':
  3     [
  4         {
  5             sampleTime: '1450632410296',
  6             data: '76.36731:3.4651554:0.5665419'
  7         },
  8         {
  9             sampleTime: '1450632410296',
 10             data: '78.15431:0.5247617:-0.20050584'
 11         }
 12     ],
 13     'Screen Orientation Sensor':
 14     [
 15         {
 16             sampleTime: '1450632410296',
 17             data: '255.0:-1.0:0.0'
 18         }
 19     ],
 20     'MPU6500 Gyroscope sensor UnCalibrated':
 21     [
 22         {
 23             sampleTime: '1450632410296',
 24             data: '-0.05006743:-0.013848438:-0.0063915867
 25         },
 26         {
 27             sampleTime: '1450632410296',
 28             data: '-0.051132694:-0.0127831735:-0.003325345'
 29         }
 30     ]
 31 }

There are a lot of great articles on how to manipulate objects in Javascript (whether using Node JS or a browser). I suggest here is a good place to start: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_Objects

The solution is:

NameVirtualHost *:80
Listen 80

(...)

<VirtualHost *:80>
    ServerName host1
    DocumentRoot /someDir
</VirtualHost>

<VirtualHost *:80>
    ServerName host2
    DocumentRoot /someOtherDir
</VirtualHost>

<VirtualHost *:80>
    ServerName aaaa.com
    DocumentRoot /defaultDir
</VirtualHost>

In my case, to work, I created a VirtualHost (n.e. VirtualHost per CNAME) called aaaa.com since I have different files for different VirtualHosts and knowing that Apache reads them in alphabetical order.

onActivityCreated() - Deprecated

onActivityCreated() is now deprecated as Fragments Version 1.3.0-alpha02

The onActivityCreated() method is now deprecated. Code touching the fragment's view should be done in onViewCreated() (which is called immediately before onActivityCreated()) and other initialization code should be in onCreate(). To receive a callback specifically when the activity's onCreate() is complete, a LifeCycleObserver should be registered on the activity's Lifecycle in onAttach(), and removed once the onCreate() callback is received.

Detailed information can be found here

In VS2013 you can click in the solution explorer for this functionality.

The shortcut is:

ctrl + ;

To search only the names of files, and not the contents (especially in C#), uncheck these options:

Press Ctrl + Space to get a autocomplete hint.

You've already done it correctly by using a DateTime parameter with the value from the DateTime, so it should already work. Forget about ToString() - since that isn't used here.

If there is a difference, it is most likely to do with different precision between the two environments; maybe choose a rounding (seconds, maybe?) and use that. Also keep in mind UTC/local/unknown (the DB has no concept of the "kind" of date; .NET does).

I have a table and the date-times in it are in the format: 2011-07-01 15:17:33.357

Note that datetimes in the database aren't in any such format; that is just your query-client showing you white lies. It is stored as a number (and even that is an implementation detail), because humans have this odd tendency not to realise that the date you've shown is the same as 40723.6371916281. Stupid humans. By treating it simply as a "datetime" throughout, you shouldn't get any problems.

I ran accross the same kind of problem with the server dying when trying to use the swap. This is because mod_php does not free memory ever. So Apache processes keep growing either reaching apache or PHP's memory limit or, if there's no limit, crashing the server.

Restarting apache makes it to spawn new fresh slim processes but as they run PHP scripts over time, they grow until problems arise.

The solution is to make apache to kill processes after a certain number of queries served so it will create new ones ( There are some questions related to that) reducing the MaxRequestsPerChild configuration option to, let's say 100 (Defaults to 1000).

Of course this may reduce server performances as it takes ressources to kill and spawn new processes but at least it keeps the site working. You might be tempted to raise the number of running processes to keep performances high, be sure PHP (or apache) memory limit x max number of processes do not get over your server's physical ram.

Here's my experience, hope it helps.

if you call pyplot as plt

frameon=False is to remove the border around the legend

and '' is passing the information that no variable should be in the legend

import matplotlib.pyplot as plt
plt.legend('',frameon=False)

I installed mongodb with EBS on an EC2 with Ubuntu 14.04 following this tutorial:

http://docs.mongodb.org/ecosystem/platforms/amazon-ec2/

But instead of the suggested chown I did:

sudo chown -R mongodb:mongodb /data /log /journal

To fix the problem

You don't need the "eval" even. Just put a dollar sign in front of the string:

cmd="ls"
$cmd

I did not test the following snippet... hopefully it will point you towards the right direction:

    var jsreader = new JsonTextReader(new StringReader(stringData));
    var json = (JObject)new JsonSerializer().Deserialize(jsreader);
    var tableRows = from p in json["items"]
                 select new
                 {
                     Name = (string)p["Name"],
                     Age = (int)p["Age"],
                     Job = (string)p["Job"]
                 };

The first parameter of Html.RadioButtonFor() should be the property name you're using, and the second parameter should be the value of that specific radio button. Then they'll have the same name attribute value and the helper will select the given radio button when/if it matches the property value.

Example:

<div class="editor-field">
    <%= Html.RadioButtonFor(m => m.Gender, "M" ) %> Male
    <%= Html.RadioButtonFor(m => m.Gender, "F" ) %> Female
</div>

Here's a more specific example:

I made a quick MVC project named "DeleteMeQuestion" (DeleteMe prefix so I know that I can remove it later after I forget about it).

I made the following model:

namespace DeleteMeQuestion.Models
{
    public class QuizModel
    {
        public int ParentQuestionId { get; set; }
        public int QuestionId { get; set; }
        public string QuestionDisplayText { get; set; }
        public List<Response> Responses { get; set; }

        [Range(1,999, ErrorMessage = "Please choose a response.")]
        public int SelectedResponse { get; set; }
    }

    public class Response
    {
        public int ResponseId { get; set; }
        public int ChildQuestionId { get; set; }
        public string ResponseDisplayText { get; set; }
    }
}

There's a simple range validator in the model, just for fun. Next up, I made the following controller:

namespace DeleteMeQuestion.Controllers
{
    [HandleError]
    public class HomeController : Controller
    {
        public ActionResult Index(int? id)
        {
            // TODO: get question to show based on method parameter 
            var model = GetModel(id);
            return View(model);
        }

        [HttpPost]
        public ActionResult Index(int? id, QuizModel model)
        {
            if (!ModelState.IsValid)
            {
                var freshModel = GetModel(id);
                return View(freshModel);
            }

            // TODO: save selected answer in database
            // TODO: get next question based on selected answer (hard coded to 999 for now)

            var nextQuestionId = 999;
            return RedirectToAction("Index", "Home", new {id = nextQuestionId});
        }

        private QuizModel GetModel(int? questionId)
        {
            // just a stub, in lieu of a database

            var model = new QuizModel
            {
                QuestionDisplayText = questionId.HasValue ? "And so on..." : "What is your favorite color?",
                QuestionId = 1,
                Responses = new List<Response>
                                                {
                                                    new Response
                                                        {
                                                            ChildQuestionId = 2,
                                                            ResponseId = 1,
                                                            ResponseDisplayText = "Red"
                                                        },
                                                    new Response
                                                        {
                                                            ChildQuestionId = 3,
                                                            ResponseId = 2,
                                                            ResponseDisplayText = "Blue"
                                                        },
                                                    new Response
                                                        {
                                                            ChildQuestionId = 4,
                                                            ResponseId = 3,
                                                            ResponseDisplayText = "Green"
                                                        },
                                                }
            };

            return model;
        }
    }
}

Finally, I made the following view that makes use of the model:

<%@ Page Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<DeleteMeQuestion.Models.QuizModel>" %>

<asp:Content ContentPlaceHolderID="TitleContent" runat="server">
    Home Page
</asp:Content>

<asp:Content ContentPlaceHolderID="MainContent" runat="server">

    <% using (Html.BeginForm()) { %>

        <div>

            <h1><%: Model.QuestionDisplayText %></h1>

            <div>
            <ul>
            <% foreach (var item in Model.Responses) { %>
                <li>
                    <%= Html.RadioButtonFor(m => m.SelectedResponse, item.ResponseId, new {id="Response" + item.ResponseId}) %>
                    <label for="Response<%: item.ResponseId %>"><%: item.ResponseDisplayText %></label>
                </li>
            <% } %>
            </ul>

            <%= Html.ValidationMessageFor(m => m.SelectedResponse) %>

        </div>

        <input type="submit" value="Submit" />

    <% } %>

</asp:Content>

As I understand your context, you have questions with a list of available answers. Each answer will dictate the next question. Hopefully that makes sense from my model and TODO comments.

This gives you the radio buttons with the same name attribute, but different ID attributes.

The "double quote" + 'single quote' combo is not needed

console.log( $('#'+d) ); // single quotes only
console.log( $("#"+d) ); // double quotes only

Your selector results like this, which is overkill with the quotes:

$('"#abc"') // -> it'll try to find  <div id='"#abc"'>

// In css, this would be the equivalent:
"#abc"{ /* Wrong */ } // instead of:
#abc{ /* Right */ }

Have the same problem with white screen during transition from one fragment to another. Have navigation and animations set in action in navigation.xml.

Background in all fragments the same but white blank screen. So i set navOptions in fragment during executing transition

          //Transition options
        val options = navOptions {
            anim {
                enter = R.anim.slide_in_right
                exit = R.anim.slide_out_left
                popEnter = R.anim.slide_in_left
                popExit = R.anim.slide_out_right
            }
        }

.......................

  this.findNavController().navigate(SampleFragmentDirections.actionSampleFragmentToChartFragment(it),
                    options)

It worked for me. No white screen between transistion. Magic )

Without java code:

drawable/dotted.xml:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="line">

    <stroke
       android:color="#FF00FF"
       android:dashWidth="10px"
       android:dashGap="10px"
       android:width="1dp"/>
</shape>

view.xml:

<ImageView
    android:layout_width="match_parent"
    android:layout_height="5dp"
    android:src="@drawable/dotted"
    android:layerType="software" />

Effect:

I know it's already an old question, but i had the same error today. For me setting the connection variable on model did the work.

/**
 * Table properties
 */
protected $connection = 'mysql-utf8';
protected $table = 'notification';
protected $primaryKey = 'id';

I don't know if the issue was with the database (probably), but the texts fields with special chars (like ~, ´ e etc) were all messed up.

---- Editing

That $connection var is used to select wich db connection your model will use. Sometimes it happens that in database.php (under /config folder) you have multiples connections and the default one is not using UTF-8 charset.

In any case, be sure to properly use charset and collation into your connection.

'connections' => [

    'mysql' => [
        'driver' => 'mysql',
        'host' => env('DB_HOST', '127.0.0.1'),
        'port' => env('DB_PORT', '3306'),
        'database' => env('DB_DATABASE', 'your_database'),
        'username' => env('DB_USERNAME', 'root'),
        'password' => env('DB_PASSWORD', 'database_password'),
        'unix_socket' => env('DB_SOCKET', ''),
        'prefix' => '',
        'strict' => false,
        'engine' => null
    ],

    'mysql-utf8' => [
        'driver' => 'mysql',
        'host' => env('DB_HOST', '127.0.0.1'),
        'port' => env('DB_PORT', '3306'),
        'database' => env('DB_DATABASE', 'your_database'),
        'username' => env('DB_USERNAME', 'root'),
        'password' => env('DB_PASSWORD', 'database_password'),
        'unix_socket' => env('DB_SOCKET', ''),
        'charset' => 'utf8',
        'collation' => 'utf8_unicode_ci',
        'prefix' => '',
        'strict' => false,
        'engine' => null
    ],

Because of things like this, as a general rule of thumb, I try to avoid as much XAML "trickery" as possible and keep the XAML as dumb and simple as possible and do the rest in the ViewModel (or attached properties or IValueConverters etc. if really necessary).

If possible I would give the ViewModel of the current DataContext a reference (i.e. property) to the relevant parent ViewModel

public class ThisViewModel : ViewModelBase
{
    TypeOfAncestorViewModel Parent { get; set; }
}

and bind against that directly instead.

<TextBox Text="{Binding Parent}" />

It is not possible to get the height of the screen from CSS. However, using since CSS3 you can use media queries to control the display of the template as per the resolution.

If you want to code on the basis of height using media queries, you can define style-sheet and call it like this.

<link rel="stylesheet" media="screen and (device-height: 600px)" />

Try pip uninstall jupyter_core. Details below:

I ran into a similar issue when my jupyter notebook only showed Python 2 notebook. (no Python 3 notebook)

I tried to uninstall jupyter by pip unistall jupyter, pi3 uninstall jupyter, and the suggested pip-autoremove jupyter -y.

Nothing worked. I ran which jupyter, and got /home/ankit/.local/bin/jupyter

The file /home/ankit/.local/bin/jupyter was just a simple python code:

#!/usr/bin/python3

# -*- coding: utf-8 -*-
import re
import sys

from jupyter_core.command import main

if __name__ == '__main__':
    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
    sys.exit(main())

Tried to uninstall the module jupyter_core by pip uninstall jupyter_core and it worked.

Reinstalled jupyter with pip3 install jupyter and everything was back to normal.

The only difference between innerText and innerHTML is that innerText insert string as it is into the element, while innerHTML run it as html content.

const ourstring = 'My name is <b class="name">Satish chandra Gupta</b>.';_x000D_
document.getElementById('innertext').innerText = ourstring;_x000D_
document.getElementById('innerhtml').innerHTML = ourstring;

.name{_x000D_
color:red;_x000D_
}

<h3>Inner text below. It inject string as it is into the element.</h3>_x000D_
<div id="innertext"></div>_x000D_
<br />_x000D_
<h3>Inner html below. It renders the string into the element and treat as part of html document.</h3>_x000D_
<div id="innerhtml"></div>

Here is a working example (you'll have to trust me that there's a submit() method on the controller - it prints an Object, like {user: 'abc'} if 'abc' is entered in the input field):

<form #loginForm="ngForm" (ngSubmit)="submit(loginForm.value)">
    <input type="text" name="user" ngModel required>
    <button  type="submit"  [disabled]="loginForm.invalid">
        Submit
    </button>
</form>

As you can see:

• don't use loginForm.form, just use loginForm
• loginForm.invalid works as well as !loginForm.valid
• if you want submit() to be passed the correct value(s), the input element should have name and ngModel attributes

Also, this is when you're NOT using the new FormBuilder, which I recommend. Things are very different when using FormBuilder.

Further to @Womp answer, it's worth noting that the "Where" Can be dropped, and the predicate can be put into the "First" call directly, like this:

list.First(x => x.Value == "selectedValue").Selected = true;

ignoreParent() is a pure JavaScript solution.

It works as an intermediary layer that compares the coordinates of the mouse click with the coordinates of the child element/s. Two simple implementation steps:

1. Put the ignoreParent() code on your page.

2. Instead of the parent's original onclick="parentEvent();", write:

onclick="ignoreParent(['parentEvent()', 'child-ID']);"

You may pass IDs of any number of child elements to the function, and exclude others.

If you clicked on one of the child elements, the parent event doesn't fire. If you clicked on parent, but not on any of the child elements [provided as arguments], the parent event is fired.

ignoreParent() code on Github

printf

1. printf is used to perform output on the screen.
2. syntax = printf("control string ", argument );
3. It is not associated with File input/output

fprintf

1. The fprintf it used to perform write operation in the file pointed to by FILE handle.
2. The syntax is fprintf (filename, "control string ", argument );
3. It is associated with file input/output

you need to decode the bytes of you want a string:

b = b'1234'
print(b.decode('utf-8'))  # '1234'

//This will get you the day of the month
String.valueOf((Calendar.getInstance()).get(Calendar.DAY_OF_MONTH))

I always do it like this:

$("#id").css("width", "50%");

what about (2.3465*100).round()/100.0?

PHP 5.4 has a function called http_response_code, so if you're using PHP 5.4 you can just do:

http_response_code(500);

I've written a polyfill for this function (Gist) if you're running a version of PHP under 5.4.

To answer your follow-up question, the HTTP 1.1 RFC says:

The reason phrases listed here are only recommendations -- they MAY be replaced by local equivalents without affecting the protocol.

That means you can use whatever text you want (excluding carriage returns or line feeds) after the code itself, and it'll work. Generally, though, there's usually a better response code to use. For example, instead of using a 500 for no record found, you could send a 404 (not found), and for something like "conditions failed" (I'm guessing a validation error), you could send something like a 422 (unprocessable entity).

Django's contributed humanize application does this:

{% load humanize %}
{{ my_num|intcomma }}

Be sure to add 'django.contrib.humanize' to your INSTALLED_APPS list in the settings.py file.

git-bash reports fatal: Unable to create <Path to git repo>/.git/index.lock: File exists.

Deleting index.lock makes the error go away.

I'll assume you mean the URI:

class BankController < ActionController::Base
  before_filter :pre_process 

  def index
    # do something
  end

  private
    def pre_process
      logger.debug("The URL" + request.url)
    end
end

As per your comment below, if you need the name of the controller, you can simply do this:

  private
    def pre_process
      self.controller_name        #  Will return "order"
      self.controller_class_name  # Will return "OrderController"
    end

Here is the changeLocation example from this article http://www.yearofmoo.com/2012/10/more-angularjs-magic-to-supercharge-your-webapp.html#apply-digest-and-phase

//be sure to inject $scope and $location
var changeLocation = function(url, forceReload) {
  $scope = $scope || angular.element(document).scope();
  if(forceReload || $scope.$$phase) {
    window.location = url;
  }
  else {
    //only use this if you want to replace the history stack
    //$location.path(url).replace();

    //this this if you want to change the URL and add it to the history stack
    $location.path(url);
    $scope.$apply();
  }
};

If you want a list of lists:

>>> [list(t) for t in zip(*l)]
[[1, 3, 8], [2, 4, 9]]

If a list of tuples is OK:

>>> zip(*l)
[(1, 3, 8), (2, 4, 9)]

You can instantiate an empty array with a given number of entries if you pass an int to the Array constructor and then iterate over it via ngFor.

In your component code :

export class ForLoop {
  fakeArray = new Array(12);
}

In your template :

<ul>
  <li *ngFor="let a of fakeArray; let index = index">Something {{ index }}</li>
</ul>

The index properties give you the iteration number.

Live version

import { timer } from 'rxjs';

await timer(1000).pipe(take(1)).toPromise();

this works better for me

All procedure at once. Based on @Till Schäfer answer.

In KB...

jstat -gc $(ps axf | egrep -i "*/bin/java *" | egrep -v grep | awk '{print $1}') | tail -n 1 | awk '{split($0,a," "); sum=(a[3]+a[4]+a[6]+a[8]+a[10]); printf("%.2f KB\n",sum)}'

In MB...

jstat -gc $(ps axf | egrep -i "*/bin/java *" | egrep -v grep | awk '{print $1}') | tail -n 1 | awk '{split($0,a," "); sum=(a[3]+a[4]+a[6]+a[8]+a[10])/1024; printf("%.2f MB\n",sum)}'

"Awk sum" reference:

 a[1] - S0C
 a[2] - S1C
 a[3] - S0U
 a[4] - S1U
 a[5] - EC
 a[6] - EU
 a[7] - OC
 a[8] - OU
 a[9] - PC
a[10] - PU
a[11] - YGC
a[12] - YGCT
a[13] - FGC
a[14] - FGCT
a[15] - GCT

Used for "Awk sum":

a[3] -- (S0U) Survivor space 0 utilization (KB).
a[4] -- (S1U) Survivor space 1 utilization (KB).
a[6] -- (EU) Eden space utilization (KB).
a[8] -- (OU) Old space utilization (KB).
a[10] - (PU) Permanent space utilization (KB).

[Ref.: https://docs.oracle.com/javase/7/docs/technotes/tools/share/jstat.html ]

Thanks!

NOTE: Works to OpenJDK!

FURTHER QUESTION: Wrong information?

If you check memory usage with the ps command, you will see that the java process consumes much more...

ps -eo size,pid,user,command --sort -size | egrep -i "*/bin/java *" | egrep -v grep | awk '{ hr=$1/1024 ; printf("%.2f MB ",hr) } { for ( x=4 ; x<=NF ; x++ ) { printf("%s ",$x) } print "" }' | cut -d "" -f2 | cut -d "-" -f1

UPDATE (2021-02-16):

According to the reference below (and @Till Schäfer comment) "ps can show total reserved memory from OS" (adapted) and "jstat can show used space of heap and stack" (adapted). So, we see a difference between what is pointed out by the ps command and the jstat command.

According to our understanding, the most "realistic" information would be the ps output since we will have an effective response of how much of the system's memory is compromised. The command jstat serves for a more detailed analysis regarding the java performance in the consumption of reserved memory from OS.

[Ref.: http://www.openkb.info/2014/06/how-to-check-java-memory-usage.html ]

This is 2018 and still there is no native method to completely clear canvas for redrawing. clearRect() does not clear the canvas completely. Non-fill type drawings are not cleared out (eg. rect())

1.To completely clear canvas irrespective of how you draw:

context.clearRect(0, 0, context.canvas.width, context.canvas.height);
context.beginPath();

Pros: Preserves strokeStyle, fillStyle etc.; No lag;

Cons: Unnecessary if you are already using beginPath before drawing anything

2.Using the width/height hack:

context.canvas.width = context.canvas.width;

OR

context.canvas.height = context.canvas.height;

Pros: Works with IE Cons: Resets strokeStyle, fillStyle to black; Laggy;

I was wondering why a native solution does not exist. Actually, clearRect() is considered as the single line solution because most users do beginPath() before drawing any new path. Though beginPath is only to be used while drawing lines and not closed path like rect().

This is the reason why the accepted answer did not solve my problem and I ended up wasting hours trying different hacks. Curse you mozilla

Here is a very nifty way.

First format the content such that the column to be compared for uniqueness is a fixed width. One way of doing this is to use awk printf with a field/column width specifier ("%15s").

Now the -f and -w options of uniq can be used to skip preceding fields/columns and to specify the comparison width (column(s) width).

Here are three examples.

In the first example...

1) Temporarily make the column of interest a fixed width greater than or equal to the field's max width.

2) Use -f uniq option to skip the prior columns, and use the -w uniq option to limit the width to the tmp_fixed_width.

3) Remove trailing spaces from the column to "restore" it's width (assuming there were no trailing spaces beforehand).

printf "%s" "$str" \
| awk '{ tmp_fixed_width=15; uniq_col=8; w=tmp_fixed_width-length($uniq_col); for (i=0;i<w;i++) { $uniq_col=$uniq_col" "}; printf "%s\n", $0 }' \
| uniq -f 7 -w 15 \
| awk '{ uniq_col=8; gsub(/ */, "", $uniq_col); printf "%s\n", $0 }'

In the second example...

Create a new uniq column 1. Then remove it after the uniq filter has been applied.

printf "%s" "$str" \
| awk '{ uniq_col_1=4; printf "%15s %s\n", uniq_col_1, $0 }' \
| uniq -f 0 -w 15 \
| awk '{ $1=""; gsub(/^ */, "", $0); printf "%s\n", $0 }'

The third example is the same as the second, but for multiple columns.

printf "%s" "$str" \
| awk '{ uniq_col_1=4; uniq_col_2=8; printf "%5s %15s %s\n", uniq_col_1, uniq_col_2, $0 }' \
| uniq -f 0 -w 5 \
| uniq -f 1 -w 15 \
| awk '{ $1=$2=""; gsub(/^ */, "", $0); printf "%s\n", $0 }'

You cant have multiple ng-view. Below is my use case where I solved my requirement. I wanted to have tabbed behavior in my model dialog. I was facing issue as click on tabs having hyperlink which will invoke router links. I solved this using button and css for tabs. When user clicks on tab, it actually will not call any hyperlink which will always invoke the ng-router. When user click on tab it will call a method, where I dynamcilly load html. Below is the function on click of tab

self.submit = function(form) {
                $templateRequest('resources/items/employee/test_template.html').then(function(template){
                var compiledeHTML = $compile(template)($scope);
                $("#d").replaceWith(compiledeHTML);
});

User $templateRequest. In test_template.html page add your html content. This html content will be bind to your controller.

Declare @DatePeriod datetime
Set @DatePeriod = '2011-05-30'

Select  ProductName,
        IsNull([1],0) as 'Week 1',
        IsNull([2],0) as 'Week 2',
        IsNull([3],0) as 'Week 3',
        IsNull([4],0) as 'Week 4',
        IsNull([5], 0) as 'Week 5'
From 
(
Select  ProductName,
        DATEDIFF(week, DATEADD(MONTH, DATEDIFF(MONTH, 0, '2011-05-30'), 0), '2011-05-30') +1 as [Weeks],
        Sale as 'Sale'
From dbo.WeekReport

-- Only get rows where the date is the same as the DatePeriod
-- i.e DatePeriod is 30th May 2011 then only the weeks of May will be calculated
Where DatePart(Month, '2011-05-30')= DatePart(Month, @DatePeriod)
)p 
Pivot (Sum(Sale) for Weeks in ([1],[2],[3],[4],[5])) as pv

OUTPUT LOOK LIKE THIS

a   0   0   0   0   20
b   0   0   0   0   4
c   0   0   0   0   3

In Visual Studio 2015 Update3 I have this feature.

Just by highlighting properties and then press Ctrl + . and then press Generate Constructor.

For example, if you've highlighted two properties it will suggest you to create a constructor with two parameters and if you've selected three it will suggest one with three parameters and so on.

It also works with Visual Studio 2017 and 2019.

There is a lot of ways to achieve this. In regards to the way you are asking, with a hidden form element.

create this form element inside your form:

<input type="hidden" name="total" value="">

So your form like this:

<form id="sampleForm" name="sampleForm" method="post" action="phpscript.php">
<input type="hidden" name="total" id="total" value="">
<a href="#" onclick="setValue();">Click to submit</a>
</form>

Then your javascript something like this:

<script>
function setValue(){
    document.sampleForm.total.value = 100;
    document.forms["sampleForm"].submit();
}
</script>

For what it's worth my issue was that the files themselves were in the wrong encoding. Using iconv worked for me

iconv -f ISO-8859-15 -t UTF-8  messages_nl.properties > messages_nl.properties.new

For existing matches, use query:

df.query(' A > 3' ).head(1)
Out[33]: 
   A  B  C
2  4  6  3

df.query(' A > 4 and B > 3' ).head(1)
Out[34]: 
   A  B  C
4  5  4  5

df.query(' A > 3 and (B > 3 or C > 2)' ).head(1)
Out[35]: 
   A  B  C
2  4  6  3

With rxjs 6.2.2 and Angular 6.1.7, I was getting an:

Observable.timer is not a function

error. This was resolved by replacing Observable.timer with timer:

import { timer, Subscription } from 'rxjs';

private myTimerSub: Subscription;    

ngOnInit(){    
    const ti = timer(2000,1000);    
    this.myTimerSub = ti.subscribe(t => {    
        console.log("Tick");    
    });    
}    

ngOnDestroy() {    
    this.myTimerSub.unsubscribe();    
}

In the OpenGL ES 2.0/3.0 you can also combining OGL View and Android's UI-elements:

public class GameActivity extends AppCompatActivity {
    private SurfaceView surfaceView;
    @Override
    protected void onCreate(Bundle state) { 
        setContentView(R.layout.activity_gl);
        surfaceView = findViewById(R.id.oglView);
        surfaceView.init(this.getApplicationContext());
        ...
    } 
}

public class SurfaceView extends GLSurfaceView {
    private SceneRenderer renderer;
    public SurfaceView(Context context) {
        super(context);
    }

    public SurfaceView(Context context, AttributeSet attributes) {
        super(context, attributes);
    }

    public void init(Context context) {
        renderer = new SceneRenderer(context);
        setRenderer(renderer);
        ...
    }
}

Create layout activity_gl.xml:

<?xml version="1.0" encoding="utf-8"?>
    <androidx.constraintlayout.widget.ConstraintLayout
        tools:context=".activities.GameActivity">
    <com.app.SurfaceView
        android:id="@+id/oglView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
    <TextView ... />
    <TextView ... />
    <TextView ... />
</androidx.constraintlayout.widget.ConstraintLayout>

To update elements from the render thread, can use Handler/Looper.

static variables are specific to a class . Constructors initialize attributes ESPECIALY for an instance.

For React Native projects

It was already fixed on RN 0.59. You can find on upgrade diff from 0.58.6 to 0.59 You can apply it without upgrading you RN versionust follow the below steps:

Create files:

android/app/src/debug/res/xml/react_native_config.xml -

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
  <domain-config cleartextTrafficPermitted="true">
    <domain includeSubdomains="false">localhost</domain>
    <domain includeSubdomains="false">10.0.2.2</domain>
    <domain includeSubdomains="false">10.0.3.2</domain>
  </domain-config>
</network-security-config>

android/app/src/debug/AndroidManifest.xml -

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools">

  <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>

  <application tools:targetApi="28"
      tools:ignore="GoogleAppIndexingWarning" 
      android:networkSecurityConfig="@xml/react_native_config" />
</manifest>

Check the accepted answer to know the root cause.

The receiver must set port of receiver to match port set in sender DatagramPacket. For debugging try listening on port > 1024 (e.g. 8000 or 9000). Ports < 1024 are typically used by system services and need admin access to bind on such a port.

If the receiver sends packet to the hard-coded port it's listening to (e.g. port 57) and the sender is on the same machine then you would create a loopback to the receiver itself. Always use the port specified from the packet and in case of production software would need a check in any case to prevent such a case.

Another reason a packet won't get to destination is the wrong IP address specified in the sender. UDP unlike TCP will attempt to send out a packet even if the address is unreachable and the sender will not receive an error indication. You can check this by printing the address in the receiver as a precaution for debugging.

In the sender you set:

 byte [] IP= { (byte)192, (byte)168, 1, 106 };
 InetAddress address = InetAddress.getByAddress(IP);

but might be simpler to use the address in string form:

 InetAddress address = InetAddress.getByName("192.168.1.106");

In other words, you set target as 192.168.1.106. If this is not the receiver then you won't get the packet.

Here's a simple UDP Receiver that works :

import java.io.IOException;
import java.net.*;

public class Receiver {

    public static void main(String[] args) {
        int port = args.length == 0 ? 57 : Integer.parseInt(args[0]);
        new Receiver().run(port);
    }

    public void run(int port) {    
      try {
        DatagramSocket serverSocket = new DatagramSocket(port);
        byte[] receiveData = new byte[8];
        String sendString = "polo";
        byte[] sendData = sendString.getBytes("UTF-8");

        System.out.printf("Listening on udp:%s:%d%n",
                InetAddress.getLocalHost().getHostAddress(), port);     
        DatagramPacket receivePacket = new DatagramPacket(receiveData,
                           receiveData.length);

        while(true)
        {
              serverSocket.receive(receivePacket);
              String sentence = new String( receivePacket.getData(), 0,
                                 receivePacket.getLength() );
              System.out.println("RECEIVED: " + sentence);
              // now send acknowledgement packet back to sender     
              DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length,
                   receivePacket.getAddress(), receivePacket.getPort());
              serverSocket.send(sendPacket);
        }
      } catch (IOException e) {
              System.out.println(e);
      }
      // should close serverSocket in finally block
    }
}

You do not specify why you think it is wrong but I can se two dangers:

BETWEEN can be implemented differently in different databases sometimes it is including the border values and sometimes excluding, resulting in that 1 and 31 of january would end up NOTHING. You should test how you database does this.

Also, if RATE_DATE contains hours also 2010-01-31 might be translated to 2010-01-31 00:00 which also would exclude any row with an hour other that 00:00.

Possibly, most easy way will be to use:

https://github.com/ukushu/DataExporter

especially in case of your data of datatable containing /r/n characters or separator symbol inside of your dataTable cells. Almost all of other answers will not work with such cells.

only you need is to write the following code:

Csv csv = new Csv("\t");//Needed delimiter 

var columnNames = dt.Columns.Cast<DataColumn>().
    Select(column => column.ColumnName).ToArray();

csv.AddRow(columnNames);

foreach (DataRow row in dt.Rows)
{
    var fields = row.ItemArray.Select(field => field.ToString()).ToArray;
    csv.AddRow(fields);   
}

csv.Save();

• xlrd/xlwt (standard): Python does not have this functionality in it's standard library, but I think of xlrd/xlwt as the "standard" way to read and write excel files. It is fairly easy to make a workbook, add sheets, write data/formulas, and format cells. If you need all of these things, you may have the most success with this library. I think you could choose openpyxl instead and it would be quite similar, but I have not used it.

  To format cells with xlwt, define a XFStyle and include the style when you write to a sheet. Here is an example with many number formats. See example code below.

• Tablib (powerful, intuitive): Tablib is a more powerful yet intuitive library for working with tabular data. It can write excel workbooks with multiple sheets as well as other formats, such as csv, json, and yaml. If you don't need formatted cells (like background color), you will do yourself a favor to use this library, which will get you farther in the long run.

• csv (easy): Files on your computer are either text or binary. Text files are just characters, including special ones like newlines and tabs, and can be easily opened anywhere (e.g. notepad, your web browser, or Office products). A csv file is a text file that is formatted in a certain way: each line is a list of values, separated by commas. Python programs can easily read and write text, so a csv file is the easiest and fastest way to export data from your python program into excel (or another python program).

  Excel files are binary and require special libraries that know the file format, which is why you need an additional library for python, or a special program like Microsoft Excel, Gnumeric, or LibreOffice, to read/write them.

import xlwt

style = xlwt.XFStyle()
style.num_format_str = '0.00E+00'

...

for i,n in enumerate(list1):
    sheet1.write(i, 0, n, fmt)

It looks like you're using python 3.x. In python3, filter, map, zip, etc return an object which is iterable, but not a list. In other words,

filter(func,data) #python 2.x

is equivalent to:

list(filter(func,data)) #python 3.x

I think it was changed because you (often) want to do the filtering in a lazy sense -- You don't need to consume all of the memory to create a list up front, as long as the iterator returns the same thing a list would during iteration.

If you're familiar with list comprehensions and generator expressions, the above filter is now (almost) equivalent to the following in python3.x:

( x for x in data if func(x) ) 

As opposed to:

[ x for x in data if func(x) ]

in python 2.x

I use objects JSON style for dumb structs (no member functions).

Use this one

   AlertDialog.Builder builder = new AlertDialog.Builder(activity);
    // Get the layout inflater
    LayoutInflater inflater = (activity).getLayoutInflater();
    // Inflate and set the layout for the dialog
    // Pass null as the parent view because its going in the
    // dialog layout
    builder.setTitle(title);
    builder.setCancelable(false);
    builder.setIcon(R.drawable.galleryalart);
    builder.setView(inflater.inflate(R.layout.dialogue, null))
    // Add action buttons
            .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int id) {

                    }
                }
            });
    builder.create();
    builder.show();

In Windows 10,

1. Add User Variable PATH: %USERPROFILE%\AppData\Local\Android\sdk\platform-tools.
2. Restart cmd (if any open).
3. adb devices, it should list, if it does, you are all set.

That's it!

In basic two way communication systems, socket.emit has proved to be more convincing and easy to use (personal experience) and is a part of Socket.IO which is primarily built for such purposes

This is sort of an indirect approach, but you could see if a website loads on your web browser of choice from whatever is running on port 80. Or you could telnet to port 80 and see if you get a response that gives you a clue as to what is running on that port and you can go shut it down. Since port 80 is the default port for http traffic chances are there is some sort of http server running there by default, but there's no guarantee.

when you do UNIQUE as a table level constraint as you have done then what your defining is a bit like a composite primary key see ddl constraints, here is an extract

"This specifies that the *combination* of values in the indicated columns is unique across the whole table, though any one of the columns need not be (and ordinarily isn't) unique."

this means that either field could possibly have a non unique value provided the combination is unique and this does not match your foreign key constraint.

most likely you want the constraint to be at column level. so rather then define them as table level constraints, 'append' UNIQUE to the end of the column definition like name VARCHAR(60) NOT NULL UNIQUE or specify indivdual table level constraints for each field.

Another nice way of checking, if you have control the SQL, is to add a default value in the query itself for your int column. Then just check for that value.

e.g for an Oracle database, use NVL

SELECT NVL(ID_PARENT, -999) FROM TABLE_NAME;

then check

if (rs.getInt('ID_PARENT') != -999)
{
}

Of course this also is under the assumption that there is a value that wouldn't normally be found in the column.

To do it properly, you need to handle the exceptions.

Here is how I do a wait for an iFrame. This requires that your JUnit test class pass the instance of RemoteWebDriver into the page object :

public class IFrame1 extends LoadableComponent<IFrame1> {

    private RemoteWebDriver driver;

    @FindBy(id = "iFrame1TextFieldTestInputControlID" )
    public WebElement iFrame1TextFieldInput;

    @FindBy(id = "iFrame1TextFieldTestProcessButtonID" )
    public WebElement copyButton;

    public IFrame1( RemoteWebDriver drv ) {
        super();
        this.driver = drv;
        this.driver.switchTo().defaultContent();
        waitTimer(1, 1000);
        this.driver.switchTo().frame("BodyFrame1");
        LOGGER.info("IFrame1 constructor...");
    }

    @Override
    protected void isLoaded() throws Error {        
        LOGGER.info("IFrame1.isLoaded()...");
        PageFactory.initElements( driver, this );
        try {
            assertTrue( "Page visible title is not yet available.", driver
     .findElementByCssSelector("body form#webDriverUnitiFrame1TestFormID h1")
                    .getText().equals("iFrame1 Test") );
        } catch ( NoSuchElementException e) {
            LOGGER.info("No such element." );
            assertTrue("No such element.", false);
        }
    }

    @Override
    protected void load() {
        LOGGER.info("IFrame1.load()...");
        Wait<WebDriver> wait = new FluentWait<WebDriver>( driver )
                .withTimeout(30, TimeUnit.SECONDS)
                .pollingEvery(5, TimeUnit.SECONDS)
                .ignoring( NoSuchElementException.class ) 
                .ignoring( StaleElementReferenceException.class ) ;
            wait.until( ExpectedConditions.presenceOfElementLocated( 
            By.cssSelector("body form#webDriverUnitiFrame1TestFormID h1") ) );
    }
....

NOTE: You can see my entire working example here.

If we wanted to return the same matrix we would write:

return [[ m[row][col] for col in range(0,width) ] for row in range(0,height) ]

What this does is it iterates over a matrix m by going through each row and returning each element in each column. So the order would be like:

[[1,2,3],
[4,5,6],
[7,8,9]]

Now for question 3, we instead want to go column by column, returning each element in each row. So the order would be like:

[[1,4,7],
[2,5,8],
[3,6,9]]

Therefore just switch the order in which we iterate:

return [[ m[row][col] for row in range(0,height) ] for col in range(0,width) ]

Check this

SELECT GROUP_CONCAT(id)  FROM table_level where parent_id=4 group by parent_id;

Here's the more modern streams approach:

myIntegerSet.stream().filter((it) -> it % 2 != 0).collect(Collectors.toSet())

However, this makes a new set, so memory constraints might be an issue if it's a really huge set.

EDIT: previous version of this answer suggested Apache CollectionUtils but that was before steams came about.

You partial looks much like an editor template so you could include it as such (assuming of course that your partial is placed in the ~/views/controllername/EditorTemplates subfolder):

@Html.EditorFor(model => model.SomePropertyOfTypeLocaleBaseModel)

Or if this is not the case simply:

@Html.Partial("nameOfPartial", Model)

This worked for me (and I found it via the this stackoverflow question)

os.path.realpath(__file__)

I had the same issue. For me I noticed that the https is using another Certificate which was invalid in terms of expiration date. Not sure why it happened. I changed the Https port number and a new self signed cert. WCFtestClinet could connect to the server via HTTPS!

On Galaxy S3 Android 4.3 the path I use is ./storage/extSdCard/Card/ and it does the job. Hope it helps,

Both proposed possibilities (std::swap and std::iter_swap) work, they just have a slightly different syntax. Let's swap a vector's first and second element, v[0] and v[1].

We can swap based on the objects contents:

std::swap(v[0],v[1]);

Or swap based on the underlying iterator:

std::iter_swap(v.begin(),v.begin()+1);

Try it:

int main() {
  int arr[] = {1,2,3,4,5,6,7,8,9};
  std::vector<int> * v = new std::vector<int>(arr, arr + sizeof(arr) / sizeof(arr[0]));
  // put one of the above swap lines here
  // ..
  for (std::vector<int>::iterator i=v->begin(); i!=v->end(); i++)
    std::cout << *i << " ";
  std::cout << std::endl;
}

Both times you get the first two elements swapped:

2 1 3 4 5 6 7 8 9

Basically, you have two major choices:

• You can generate the identifier yourself, in which case you can use an assigned identifier.
• You can use the @GeneratedValue annotation and Hibernate will assign the identifier for you.

For the generated identifiers you have two options:

• UUID identifiers.
• Numerical identifiers.

For numerical identifiers you have three options:

• IDENTITY
• SEQUENCE
• TABLE

IDENTITY is only a good choice when you cannot use SEQUENCE (e.g. MySQL) because it disables JDBC batch updates.

SEQUENCE is the preferred option, especially when used with an identifier optimizer like pooled or pooled-lo.

TABLE is to be avoided since it uses a separate transaction to fetch the identifier and row-level locks which scales poorly.

You should not mix-up arrays and generics. They don't go well together. There are differences in how arrays and generic types enforce the type check. We say that arrays are reified, but generics are not. As a result of this, you see these differences working with arrays and generics.

Arrays are covariant, Generics are not:

What that means? You must be knowing by now that the following assignment is valid:

Object[] arr = new String[10];

Basically, an Object[] is a super type of String[], because Object is a super type of String. This is not true with generics. So, the following declaration is not valid, and won't compile:

List<Object> list = new ArrayList<String>(); // Will not compile.

Reason being, generics are invariant.

Enforcing Type Check:

Generics were introduced in Java to enforce stronger type check at compile time. As such, generic types don't have any type information at runtime due to type erasure. So, a List<String> has a static type of List<String> but a dynamic type of List.

However, arrays carry with them the runtime type information of the component type. At runtime, arrays use Array Store check to check whether you are inserting elements compatible with actual array type. So, the following code:

Object[] arr = new String[10];
arr[0] = new Integer(10);

will compile fine, but will fail at runtime, as a result of ArrayStoreCheck. With generics, this is not possible, as the compiler will try to prevent the runtime exception by providing compile time check, by avoiding creation of reference like this, as shown above.

So, what's the issue with Generic Array Creation?

Creation of array whose component type is either a type parameter, a concrete parameterized type or a bounded wildcard parameterized type, is type-unsafe.

Consider the code as below:

public <T> T[] getArray(int size) {
    T[] arr = new T[size];  // Suppose this was allowed for the time being.
    return arr;
}

Since the type of T is not known at runtime, the array created is actually an Object[]. So the above method at runtime will look like:

public Object[] getArray(int size) {
    Object[] arr = new Object[size];
    return arr;
}

Now, suppose you call this method as:

Integer[] arr = getArray(10);

Here's the problem. You have just assigned an Object[] to a reference of Integer[]. The above code will compile fine, but will fail at runtime.

That is why generic array creation is forbidden.

Why typecasting new Object[10] to E[] works?

Now your last doubt, why the below code works:

E[] elements = (E[]) new Object[10];

The above code have the same implications as explained above. If you notice, the compiler would be giving you an Unchecked Cast Warning there, as you are typecasting to an array of unknown component type. That means, the cast may fail at runtime. For e.g, if you have that code in the above method:

public <T> T[] getArray(int size) {
    T[] arr = (T[])new Object[size];        
    return arr;
}

and you call invoke it like this:

String[] arr = getArray(10);

this will fail at runtime with a ClassCastException. So, no this way will not work always.

What about creating an array of type List<String>[]?

The issue is the same. Due to type erasure, a List<String>[] is nothing but a List[]. So, had the creation of such arrays allowed, let's see what could happen:

List<String>[] strlistarr = new List<String>[10];  // Won't compile. but just consider it
Object[] objarr = strlistarr;    // this will be fine
objarr[0] = new ArrayList<Integer>(); // This should fail but succeeds.

Now the ArrayStoreCheck in the above case will succeed at runtime although that should have thrown an ArrayStoreException. That's because both List<String>[] and List<Integer>[] are compiled to List[] at runtime.

So can we create array of unbounded wildcard parameterized types?

Yes. The reason being, a List<?> is a reifiable type. And that makes sense, as there is no type associated at all. So there is nothing to loose as a result of type erasure. So, it is perfectly type-safe to create an array of such type.

List<?>[] listArr = new List<?>[10];
listArr[0] = new ArrayList<String>();  // Fine.
listArr[1] = new ArrayList<Integer>(); // Fine

Both the above case is fine, because List<?> is super type of all the instantiation of the generic type List<E>. So, it won't issue an ArrayStoreException at runtime. The case is same with raw types array. As raw types are also reifiable types, you can create an array List[].

So, it goes like, you can only create an array of reifiable types, but not non-reifiable types. Note that, in all the above cases, declaration of array is fine, it's the creation of array with new operator, which gives issues. But, there is no point in declaring an array of those reference types, as they can't point to anything but null (Ignoring the unbounded types).

Is there any workaround for E[]?

Yes, you can create the array using Array#newInstance() method:

public <E> E[] getArray(Class<E> clazz, int size) {
    @SuppressWarnings("unchecked")
    E[] arr = (E[]) Array.newInstance(clazz, size);

    return arr;
}

Typecast is needed because that method returns an Object. But you can be sure that it's a safe cast. So, you can even use @SuppressWarnings on that variable.

Let me start out by saying that I don't recommend using the method I'm about to suggest. It's much better to use event driven development and bind events only to the elements you're interested in knowing whether or not the mouse is over with mouseover, mouseout, mouseenter, mouseleave, etc.

If you absolutely must have the ability to know which element the mouse is over, you'd need to write a function that binds the mouseover event to everything in the DOM, and then store whatever the current element is in some variable.

You could so something like this:

window.which_element_is_the_mouse_on = (function() {

    var currentElement;

    $("body *").on('mouseover', function(e) {
        if(e.target === e.currentTarget) {
            currentElement = this;
        }
    });

    return function() {
        console.log(currentElement);
    }
}());

Basically, I've created an immediate function which sets the event on all elements and stores the current element within the closure to minimize your footprint.

Here's a working demo that calls window.which_element_is_the_mouse_on every second and logs what element the mouse is currently over to the console.

http://jsfiddle.net/LWFpJ/1/

Difference function declaration and function expression:

Javascript has first class functions. This means that they can be treated just like any other variable. Functions can be passed as arguments in a function, be returned from a function, and can be stored in variables.

However storing function in a variable (function expression) isn't the only way to create a function, this can also be done via a function declaration. Here are the key differences:

1. Function expressions can be anonymous whereas a function declaration must have a name.
2. Both have a name property which is used to identify the function. A function expression's name property is the name of the variable which it is bound to, whereas the name of a function declaration is simply the given name.
3. Function declarations are hoisted whereas, function expressions are not. Only the variable is hoisted to have the value of undefined.

Here is an example:

try {_x000D_
  functionOne();_x000D_
} catch (e) {_x000D_
  console.log('i cant run because im not hoisted');_x000D_
}_x000D_
_x000D_
functionTwo();_x000D_
_x000D_
// function expression, does not get hoisted_x000D_
let functionOne = function randomName() {_x000D_
    // Some code_x000D_
};_x000D_
_x000D_
// function declaration, gets hoisted_x000D_
function functionTwo() {_x000D_
   console.log('I get hoisted');_x000D_
}_x000D_
_x000D_
try {_x000D_
  randomName(); // this isn't the proper name, it is functionOne_x000D_
} catch (e) {_x000D_
  console.log('You cant call me with randomName my name is function one');_x000D_
}

:

I got the same error message when I misspelled the jQuery reference and instead of type="text/javascript" I typed "...javascirpt". ;)

It's because there is no long in javascript.

http://javascript.about.com/od/reference/g/rlong.htm

Regular javascript can be used to trap the backspace key. You can use the event.keyCode method. The keycode is 8, so the code would look something like this:

if (event.keyCode == 8) {
    // Do stuff...
}

If you want to check for both the [delete] (46) as well as the [backspace] (8) keys, use the following:

if (event.keyCode == 8 || event.keyCode == 46) {
    // Do stuff...
}

The problems were:

1. iframe content comes from another domain
2. iframe dimensions need to be adjusted for each video

The solution based on omerkirk's answer involves:

• Creating an iframe element
• Creating a dialog with autoOpen: false, width: "auto", height: "auto"
• Specifying iframe source, width and height before opening the dialog

Here is a rough outline of code:

HTML

<div class="thumb">
    <a href="http://jsfiddle.net/yBNVr/show/"   data-title="Std 4:3 ratio video" data-width="512" data-height="384"><img src="http://dummyimage.com/120x90/000/f00&text=Std+4-3+ratio+video" /></a></li>
    <a href="http://jsfiddle.net/yBNVr/1/show/" data-title="HD 16:9 ratio video" data-width="512" data-height="288"><img src="http://dummyimage.com/120x90/000/f00&text=HD+16-9+ratio+video" /></a></li>
</div>

jQuery

$(function () {
    var iframe = $('<iframe frameborder="0" marginwidth="0" marginheight="0" allowfullscreen></iframe>');
    var dialog = $("<div></div>").append(iframe).appendTo("body").dialog({
        autoOpen: false,
        modal: true,
        resizable: false,
        width: "auto",
        height: "auto",
        close: function () {
            iframe.attr("src", "");
        }
    });
    $(".thumb a").on("click", function (e) {
        e.preventDefault();
        var src = $(this).attr("href");
        var title = $(this).attr("data-title");
        var width = $(this).attr("data-width");
        var height = $(this).attr("data-height");
        iframe.attr({
            width: +width,
            height: +height,
            src: src
        });
        dialog.dialog("option", "title", title).dialog("open");
    });
});

Demo here and code here. And another example along similar lines

In sybase_driver.php

/**
* Manejador de Mensajes de Error Sybase
* Autor: Isaí Moreno
* Fecha: 06/Nov/2019
*/

static  $CODE_ERROR_SYBASE;

public static function SetCodeErrorSybase($Code) {
    if ($Code != 3621) {  /*No se toma en cuenta el código de command aborted*/
        CI_DB_sybase_driver::$CODE_ERROR_SYBASE = trim(CI_DB_sybase_driver::$CODE_ERROR_SYBASE.' '.$Code);       
    }
}

public static function GetCodeErrorSybase() {               
    return CI_DB_sybase_driver::$CODE_ERROR_SYBASE;
}

public static function msg_handler($msgnumber, $severity, $state, $line, $text)
{       
    log_message('info', 'CI_DB_sybase_driver - CODE ERROR ['.$msgnumber.'] Mensaje - '.$text);
    CI_DB_sybase_driver::SetCodeErrorSybase($msgnumber);   
}

// ------------------------------------------------------------------------

Add and modify the following methods in the same sybase_driver.php file

/**
 * The error message number
 *
 * @access  private
 * @return  integer
 */
function _error_number()
{
    // Are error numbers supported?
    return CI_DB_sybase_driver::GetCodeErrorSybase();
}

function _sybase_set_message_handler()
{
    // Are error numbers supported?     
    return sybase_set_message_handler('CI_DB_sybase_driver::msg_handler');
}

Implement in the function of a controller.

public function Eliminar_DUPLA(){       
    if($this->session->userdata($this->config->item('mycfg_session_object_name'))){     
        //***/
        $Operacion_Borrado_Exitosa=false;
        $this->db->trans_begin();

        $this->db->_sybase_set_message_handler();  <<<<<------- Activar Manejador de errores de sybase
        $Dupla_Eliminada=$this->Mi_Modelo->QUERY_Eliminar_Dupla($PARAMETROS);                   

        if ($Dupla_Eliminada){
            $this->db->trans_commit();
            MostrarNotificacion("Se eliminó DUPLA exitosamente","OK",true);
            $Operacion_Borrado_Exitosa=true;
        }else{
            $Error = $this->db->_error_number();  <<<<----- Obtengo el código de error de sybase para personilzar mensaje al usuario    
            $this->db->trans_rollback();                
            MostrarNotificacion("Ocurrio un error al intentar eliminar Dupla","Error",true);
            if ($Error == 547) {
                MostrarNotificacion("<strong>Código de error :[".$Error.']. No se puede eliminar documento Padre.</strong>',"Error",true);
            }  else {                   
                MostrarNotificacion("<strong>Código de Error :[".$Error.']</strong><br>',"Error",true);                 
            }
        }

        echo "@".Obtener_Contador_Notificaciones();
        if ($Operacion_Borrado_Exitosa){
            echo "@T";
        }else{
            echo "@F";
        }
    }else{
        redirect($this->router->default_controller);
    }

}

In the log you can check the codes and messages sent by the database server.

INFO - 2019-11-06 19:26:33 -> CI_DB_sybase_driver - CODE ERROR [547] Message - Dependent foreign key constraint violation in a referential integrity constraint. dbname = 'database', table name = 'mitabla', constraint name = 'FK_SR_RELAC_REFERENCE_SR_mitabla'. INFO - 2019-11-06 19:26:33 -> CI_DB_sybase_driver - CODE ERROR [3621] Message - Command has been aborted. ERROR - 2019-11-06 19:26:33 -> Query error: - Invalid query: delete from mitabla where ID = 1019.

I just encountered this issue and would recommend csvsql (releases) for bulk imports to Postgres. To perform a bulk insert you'd simply createdb and then use csvsql, which connects to your database and creates individual tables for an entire folder of CSVs.

$ createdb test 
$ csvsql --db postgresql:///test --insert examples/*.csv

Your ProfileDto class is not referenced in SearchResultDto. Try adding @XmlSeeAlso(ProfileDto.class) to SearchResultDto.

From the standard

7.5.2 Element identifiers: the id and class attributes

Attribute definitions

id = name [CS]
This attribute assigns a name to an element. This name must be unique in a document.

class = cdata-list [CS]
This attribute assigns a class name or set of class names to an element. Any number of elements may be assigned the same class name or names. Multiple class names must be separated by white space characters.

Yes, just put a space between them.

<article class="column wrapper">

Of course, there are many things you can do with CSS inheritance. Here is an article for further reading.

This solution worked for me. This will return you the android device's language (not the app's local language)

String locale = getApplicationContext().getResources().getConfiguration().locale.getLanguage();

This will return "en" or "de" or "fr" or whatever your device language is set to.

You can use below code for your solution:-

public void Linq94() 
{ 
    int[] numbersA = { 0, 2, 4, 5, 6, 8, 9 }; 
    int[] numbersB = { 1, 3, 5, 7, 8 }; 

    var allNumbers = numbersA.Concat(numbersB); 

    Console.WriteLine("All numbers from both arrays:"); 
    foreach (var n in allNumbers) 
    { 
        Console.WriteLine(n); 
    } 
}

replace:

input, select, textarea{
    color: #000;
}

with:

input, select, textarea{
    color: #f00;
}

or color: #ff0000;

I had the same problem with a freshly installed copy of Chrome. If nothing works, and your Use a proxy server your LAN setting is unchecked, check it and then uncheck it . Believe it or not it might work. I don't know if I should consider it a bug or not.

this is an example of a stored procedure that returns a value and it's execution in c#

CREATE PROCEDURE [dbo].[InsertPerson]   
-- Add the parameters for the stored procedure here  
@FirstName nvarchar(50),@LastName nvarchar(50),  
@PersonID int output  
AS  
BEGIN  
    insert [dbo].[Person](LastName,FirstName) Values(@LastName,@FirstName)  

    set @PersonID=SCOPE_IDENTITY()  
END  
Go  


--------------
 // Using stored procedure in adapter to insert new rows and update the identity value.  
   static void InsertPersonInAdapter(String connectionString, String firstName, String lastName) {  
      String commandText = "dbo.InsertPerson";  
      using (SqlConnection conn = new SqlConnection(connectionString)) {  
         SqlDataAdapter mySchool = new SqlDataAdapter("Select PersonID,FirstName,LastName from [dbo].[Person]", conn);  

         mySchool.InsertCommand = new SqlCommand(commandText, conn);  
         mySchool.InsertCommand.CommandType = CommandType.StoredProcedure;  

         mySchool.InsertCommand.Parameters.Add(  
             new SqlParameter("@FirstName", SqlDbType.NVarChar, 50, "FirstName"));  
         mySchool.InsertCommand.Parameters.Add(  
             new SqlParameter("@LastName", SqlDbType.NVarChar, 50, "LastName"));  

         SqlParameter personId = mySchool.InsertCommand.Parameters.Add(new SqlParameter("@PersonID", SqlDbType.Int, 0, "PersonID"));  
         personId.Direction = ParameterDirection.Output;  

         DataTable persons = new DataTable();  
         mySchool.Fill(persons);  

         DataRow newPerson = persons.NewRow();  
         newPerson["FirstName"] = firstName;  
         newPerson["LastName"] = lastName;  
         persons.Rows.Add(newPerson);  

         mySchool.Update(persons);  
         Console.WriteLine("Show all persons:");  
         ShowDataTable(persons, 14); 

To call GET,POST,DELETE,PUT All kind of request, i have created one common function

function CallAPI($method, $api, $data) {
    $url = "http://localhost:82/slimdemo/RESTAPI/" . $api;
    $curl = curl_init($url);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

    switch ($method) {
        case "GET":
            curl_setopt($curl, CURLOPT_POSTFIELDS, json_encode($data));
            curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "GET");
            break;
        case "POST":
            curl_setopt($curl, CURLOPT_POSTFIELDS, json_encode($data));
            curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "POST");
            break;
        case "PUT":
            curl_setopt($curl, CURLOPT_POSTFIELDS, json_encode($data));
            curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "PUT");
            break;
        case "DELETE":
            curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "DELETE"); 
            curl_setopt($curl, CURLOPT_POSTFIELDS, json_encode($data));
            break;
    }
    $response = curl_exec($curl);
    $data = json_decode($response);

    /* Check for 404 (file not found). */
    $httpCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
    // Check the HTTP Status code
    switch ($httpCode) {
        case 200:
            $error_status = "200: Success";
            return ($data);
            break;
        case 404:
            $error_status = "404: API Not found";
            break;
        case 500:
            $error_status = "500: servers replied with an error.";
            break;
        case 502:
            $error_status = "502: servers may be down or being upgraded. Hopefully they'll be OK soon!";
            break;
        case 503:
            $error_status = "503: service unavailable. Hopefully they'll be OK soon!";
            break;
        default:
            $error_status = "Undocumented error: " . $httpCode . " : " . curl_error($curl);
            break;
    }
    curl_close($curl);
    echo $error_status;
    die;
}

CALL Delete Method

$data = array('id'=>$_GET['did']);
$result = CallAPI('DELETE', "DeleteCategory", $data);

CALL Post Method

$data = array('title'=>$_POST['txtcategory'],'description'=>$_POST['txtdesc']);
$result = CallAPI('POST', "InsertCategory", $data);

CALL Get Method

$data = array('id'=>$_GET['eid']);
$result = CallAPI('GET', "GetCategoryById", $data);

CALL Put Method

$data = array('id'=>$_REQUEST['eid'],m'title'=>$_REQUEST['txtcategory'],'description'=>$_REQUEST['txtdesc']);
$result = CallAPI('POST', "UpdateCategory", $data);

For me deleting the derived data fixed it , I noticed even if I check out from an old commit, the same issue happens.

You can reach that option form Window-> Projects .

Below are some of the way by which you can create a link button in MVC.

@Html.ActionLink("Admin", "Index", "Home", new { area = "Admin" }, null)  
@Html.RouteLink("Admin", new { action = "Index", controller = "Home", area = "Admin" })  
@Html.Action("Action", "Controller", new { area = "AreaName" })  
@Url.Action("Action", "Controller", new { area = "AreaName" })  
<a class="ui-btn" data-val="abc" href="/Home/Edit/ANTON">Edit</a>  
<a data-ajax="true" data-ajax-method="GET" data-ajax-mode="replace" data-ajax-update="#CustomerList" href="/Home/Germany">Customer from Germany</a>  
<a data-ajax="true" data-ajax-method="GET" data-ajax-mode="replace" data-ajax-update="#CustomerList" href="/Home/Mexico">Customer from Mexico</a> 

Hope this will help you.

Here is the complete procedure for IDEA IntelliJ 2019.3:

1. File > Project Structure

2. Under Project Settings > Modules

3. Under 'Sources' tab, right-click on 'src' folder and select 'Sources'.

4. Apply changes.

You can clear your bash history like this:

history -cw

For C# user, run this simple Console App to understand how to verify the one time token code. Note that we need to install library Otp.Net from Nuget package first.

static string secretKey = "JBSWY3DPEHPK3PXP"; //add this key to your Google Authenticator app  

private static void Main(string[] args)
{
        var bytes = Base32Encoding.ToBytes(secretKey);

        var totp = new Totp(bytes);

        while (true)
        {
            Console.Write("Enter your code from Google Authenticator app: ");
            string userCode = Console.ReadLine();

            //Generate one time token code
            string tokenInApp = totp.ComputeTotp();
            int remainingSeconds = totp.RemainingSeconds();

            if (userCode.Equals(tokenInApp)
                && remainingSeconds > 0)
            {
                Console.WriteLine("Success!");
            }
            else
            {
                Console.WriteLine("Failed. Try again!");
            }
        }
}

To remove duplicates from a single column

 Sub removeDuplicate()
 'removeDuplicate Macro
 Columns("A:A").Select
 ActiveSheet.Range("$A$1:$A$117").RemoveDuplicates Columns:=Array(1), _ 
 Header:=xlNo 
 Range("A1").Select
 End Sub

if you have header then use Header:=xlYes

Increase your range as per your requirement.
you can make it to 1000 like this :

ActiveSheet.Range("$A$1:$A$1000")

More info here here

If you want to exclude multiple directories:

"r" for recursive, "l" to print only names of files containing matches and "i" to ignore case distinctions :

grep -rli --exclude-dir={dir1,dir2,dir3} keyword /path/to/search

Example : I want to find files that contain the word 'hello'. I want to search in all my linux directories except proc directory, boot directory, sys directory and root directory :

grep -rli --exclude-dir={proc,boot,root,sys} hello /

Note : The example above needs to be root

Note 2 (according to @skplunkerin) : do not add spaces after the commas in {dir1,dir2,dir3}

In my case, I have solved this way:

$scope.MyObject = // get from database or other sources;
$scope.MyObject.Date = new Date($scope.MyObject.Date);

and input type date is ok

String parentWindowHandler = driver.getWindowHandle(); // Store your parent window
String subWindowHandler = null;

Set<String> handles = driver.getWindowHandles(); // get all window handles
Iterator<String> iterator = handles.iterator();

subWindowHandler = iterator.next();

driver.switchTo().window(subWindowHandler); // switch to popup window

// Now you are in the popup window, perform necessary actions here

driver.switchTo().window(parentWindowHandler);  // switch back to parent window

i use this

<style>
html, body{height:100%;margin:0;padding:0 0} 
.container-fluid{height:100%;display:table;width:100%;padding-right:0;padding-left: 0}   
.row-fluid{height:100%;display:table-cell;vertical-align:middle;width:100%}
.centering{float:none;margin:0 auto} 
</style>
<body>
<div class="container-fluid">
     <div class="row-fluid">
     <div class="offset3 span6 centering">
            content here
         </div>
    </div>
 </div>
</body>

this is what worked for us to get the apache accessible from outside:

sudo iptables -I INPUT 4 -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
sudo service iptables restart

I've read many answers to this question often stating to simply run makemigrations in some other ways. But to me, the problem was in the Meta subclass of models.

I have an app config that says label = <app name> (in the apps.py file, beside models.py, views.py etc). If by any chance your meta class doesn't have the same label as the app label (for instance because you are splitting one too big app into multiple ones), no changes are detected (and no helpful error message whatsoever). So in my model class I have now:

class ModelClassName(models.Model):

    class Meta:
        app_label = '<app name>' # <-- this label was wrong before.

    field_name = models.FloatField()
    ...

Running Django 1.10 here.

It is an old post, but I will try to update it with a new information.

To use custom events you need to bind it to some DOM element and to trigger it. So you need to use

.on() method takes an event type and an event handling function as arguments. Optionally, it can also receive event-related data as its second argument, pushing the event handling function to the third argument. Any data that is passed will be available to the event handling function in the data property of the event object. The event handling function always receives the event object as its first argument.

and

.trigger() method takes an event type as its argument. Optionally, it can also take an array of values. These values will be passed to the event handling function as arguments after the event object.

The code looks like this:

$(document).on("getMsg", {
    msg: "Hello to everyone",
    time: new Date()
}, function(e, param) {
    console.log( e.data.msg );
    console.log( e.data.time );
    console.log( param );
});

$( document ).trigger("getMsg", [ "Hello guys"] );

Nice explanation can be found here and here. Why exactly this can be useful? I found how to use it in this excellent explanation from twitter engineer.

P.S. In plain javascript you can do this with new CustomEvent, but beware of IE and Safari problems.

class Example extends React.Component {
  render() {
    return <h1>{this.props.text}</h1>;
  }
}

Example.defaultProps = { text: 'yo' }; 

Here's an extension method using @ata answer as inspiration.

"hello-world123, 456".MakeAlphaNumeric(new char[]{'-'});// yields "hello-world123456"

or if you require additional characters other than hyphen...

"hello-world123, 456!?".MakeAlphaNumeric(new char[]{'-','!'});// yields "hello-world123456!"


public static class StringExtensions
{   
    public static string MakeAlphaNumeric(this string input, params char[] exceptions)
    {
        var charArray = input.ToCharArray();
        var alphaNumeric = Array.FindAll<char>(charArray, (c => char.IsLetterOrDigit(c)|| exceptions?.Contains(c) == true));
        return new string(alphaNumeric);
    }
}

If you are using Selenium WebdriverJS than the below code should work:

var window = new webdriver.WebDriver.Window(driver);
window.maximize();

var month = new Date().getMonth();
var newmon = month + 1;
$('#month').html((newmon < 10 ? '0' : '') + newmon );

I simply fixed your month issue, getMonth array start from 0 to 11.

Had the same problem:

$params = array('redirect_uri' => 'facebook.com/pages/foobar-dev');
$facebook->getLoginUrl($params);

When I changed the redirect_uri from the devloper page to the live page, 191 Error came up.

So I deleted the $params:

$facebook->getLoginUrl();

After the app-request now FB redirects to the app url itself f.e.: my.domain.com

What I do now is checking in index.php of my app if I'm inside FB iframe or not. If not I redirect to the live FB page f.e.:

$app = 'facebook.com/pages/foobar-live';
$rd = (isset($_SERVER['HTTP_REFERER'])) ? parse_url($_SERVER['HTTP_REFERER'], PHP_URL_HOST) : false;
if ($rd == 'apps.facebook.com' || (!isset($_REQUEST['signed_request'])))  {
    echo '<script>window.parent.location = "'.$app.'";</script>';
    die();
}