Programs & Examples On #Synchronization

Why do you want to enforce that only a single thread can access the DB at any one time?

It is the job of the database driver to implement any necessary locking, assuming a Connection is only used by one thread at a time!

Most likely, your database is perfectly capable of handling multiple, parallel access

For Linux:

git add * 
git commit -a --message "Initial Push All"
git push -u origin --all

Yes it is true.

If you create two instance of your class

Test t1 = new Test();
Test t2 = new Test();

Then t1.foo and t2.foo both synchronize on the same static object and hence block each other.

In addition to the other suggestions - you can also wrap the flag in a control class and make a final instance of it in your parent class:

public class Test {
  class Control {
    public volatile boolean flag = false;
  }
  final Control control = new Control();

  class T1 implements Runnable {
    @Override
    public void run() {
      while ( !control.flag ) {

      }
    }
  }

  class T2 implements Runnable {
    @Override
    public void run() {
      while ( !control.flag ) {

      }
    }
  }

  private void test() {
    T1 main = new T1();
    T2 help = new T2();

    new Thread(main).start();
    new Thread(help).start();
  }

  public static void main(String[] args) throws InterruptedException {
    try {
      Test test = new Test();
      test.test();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

You can use robocopy to copy files with an archive flag and reset the attribute. Use /M command line, this is my backup script with few extra tricks.

This script needs NirCmd tool to keep mouse moving so that my machine won't fall into sleep. Script is using a lockfile to tell when backup script is completed and mousemove.bat script is closed. You may leave this part out.

Another is 7-Zip tool for splitting virtualbox files smaller than 4GB files, my destination folder is still FAT32 so this is mandatory. I should use NTFS disk but haven't converted backup disks yet.

backup-robocopy.bat

@REM https://technet.microsoft.com/en-us/library/cc733145.aspx
@REM http://www.skonet.com/articles_archive/robocopy_job_template.aspx

set basedir=%~dp0
del /Q %basedir%backup-robocopy-log.txt

set dt=%date%_%time:~0,8%
echo "%dt% robocopy started" > %basedir%backup-robocopy-lock.txt
start "Keep system awake" /MIN /LOW  cmd.exe /C %basedir%backup-robocopy-movemouse.bat

set dest=E:\backup

call :BACKUP "Program Files\MariaDB 5.5\data"
call :BACKUP "projects"
call :BACKUP "Users\Myname"

:SPLIT
@REM Split +4GB file to multiple files to support FAT32 destination disk,
@REM splitted files must be stored outside of the robocopy destination folder.
set srcfile=C:\Users\Myname\VirtualBox VMs\Ubuntu\Ubuntu.vdi
set dstfile=%dest%\Users\Myname\VirtualBox VMs\Ubuntu\Ubuntu.vdi
set dstfile2=%dest%\non-robocopy\Users\Myname\VirtualBox VMs\Ubuntu\Ubuntu.vdi
IF NOT EXIST "%dstfile%" (
  IF NOT EXIST "%dstfile2%.7z.001" attrib +A "%srcfile%"
  dir /b /aa "%srcfile%" && (
    del /Q "%dstfile2%.7z.*"
    c:\apps\commands\7za.exe -mx0 -v4000m u "%dstfile2%.7z"  "%srcfile%"
    attrib -A "%srcfile%"
    @set dt=%date%_%time:~0,8%
    @echo %dt% Splitted %srcfile% >> %basedir%backup-robocopy-log.txt
  )
)

del /Q %basedir%backup-robocopy-lock.txt
GOTO :END


:BACKUP
TITLE Backup %~1
robocopy.exe "c:\%~1" "%dest%\%~1" /JOB:%basedir%backup-robocopy-job.rcj
GOTO :EOF


:END
@set dt=%date%_%time:~0,8%
@echo %dt% robocopy completed >> %basedir%backup-robocopy-log.txt
@echo %dt% robocopy completed
@pause

backup-robocopy-job.rcj

:: Robocopy Job Parameters
:: robocopy.exe "c:\projects" "E:\backup\projects" /JOB:backup-robocopy-job.rcj


:: Source Directory (this is given in command line)
::/SD:c:\examplefolder

:: Destination Directory (this is given in command line)
::/DD:E:\backup\examplefolder

:: Include files matching these names
/IF
    *.*

/M      :: copy only files with the Archive attribute and reset it.
/XJD    :: eXclude Junction points for Directories.

:: Exclude Directories
/XD
    C:\projects\bak
    C:\projects\old
    C:\project\tomcat\logs
    C:\project\tomcat\work
    C:\Users\Myname\.eclipse
    C:\Users\Myname\.m2
    C:\Users\Myname\.thumbnails
    C:\Users\Myname\AppData
    C:\Users\Myname\Favorites
    C:\Users\Myname\Links
    C:\Users\Myname\Saved Games
    C:\Users\Myname\Searches

:: Exclude files matching these names
/XF 
    C:\Users\Myname\ntuser.dat  
    *.~bpl

:: Exclude files with any of the given Attributes set
:: S=System, H=Hidden
/XA:SH      

:: Copy options
/S          :: copy Subdirectories, but not empty ones.
/E          :: copy subdirectories, including Empty ones.
/COPY:DAT   :: what to COPY for files (default is /COPY:DAT).
/DCOPY:T    :: COPY Directory Timestamps.
/PURGE      :: delete dest files/dirs that no longer exist in source.

:: Retry Options
/R:0        :: number of Retries on failed copies: default 1 million.
/W:1        :: Wait time between retries: default is 30 seconds.

:: Logging Options (LOG+ append)
/NDL        :: No Directory List - don't log directory names.
/NP         :: No Progress - don't display percentage copied.
/TEE        :: output to console window, as well as the log file.
/LOG+:c:\apps\commands\backup-robocopy-log.txt :: append to logfile

backup-robocopy-movemouse.bat

@echo off
@REM Move mouse to prevent maching from sleeping 
@rem while running a backup script

echo Keep system awake while robocopy is running,
echo this script moves a mouse once in a while.

set basedir=%~dp0
set IDX=0

:LOOP
IF NOT EXIST "%basedir%backup-robocopy-lock.txt" GOTO :EOF
SET /A IDX=%IDX% + 1
IF "%IDX%"=="240" (
  SET IDX=0
  echo Move mouse to keep system awake
  c:\apps\commands\nircmdc.exe sendmouse move 5 5
  c:\apps\commands\nircmdc.exe sendmouse move -5 -5
)
c:\apps\commands\nircmdc.exe wait 1000
GOTO :LOOP

As of 2019...

...the correct answer is to use async/await with the native fs promises module included in node. Upgrade to Node.js 10 or 11 (already supported by major cloud providers) and do this:

const fs = require('fs').promises;

// This must run inside a function marked `async`:
const file = await fs.readFile('filename.txt', 'utf8');
await fs.writeFile('filename.txt', 'test');

Do not use third-party packages and do not write your own wrappers, that's not necessary anymore.

No longer experimental

Before Node 11.14.0, you would still get a warning that this feature is experimental, but it works just fine and it's the way to go in the future. Since 11.14.0, the feature is no longer experimental and is production-ready.

What if I prefer import instead of require?

It works, too - but only in Node.js versions where this feature is not marked as experimental.

import { promises as fs } from 'fs';

(async () => {
    await fs.writeFile('./test.txt', 'test', 'utf8');
})();

Here goes my humble attempt to explain the concept to newbies around the world: (a color coded version on my blog too)

A lot of people run to a lone phone booth (they don't have mobile phones) to talk to their loved ones. The first person to catch the door-handle of the booth, is the one who is allowed to use the phone. He has to keep holding on to the handle of the door as long as he uses the phone, otherwise someone else will catch hold of the handle, throw him out and talk to his wife :) There's no queue system as such. When the person finishes his call, comes out of the booth and leaves the door handle, the next person to get hold of the door handle will be allowed to use the phone.

A thread is : Each person
The mutex is : The door handle
The lock is : The person's hand
The resource is : The phone

Any thread which has to execute some lines of code which should not be modified by other threads at the same time (using the phone to talk to his wife), has to first acquire a lock on a mutex (clutching the door handle of the booth). Only then will a thread be able to run those lines of code (making the phone call).

Once the thread has executed that code, it should release the lock on the mutex so that another thread can acquire a lock on the mutex (other people being able to access the phone booth).

[The concept of having a mutex is a bit absurd when considering real-world exclusive access, but in the programming world I guess there was no other way to let the other threads 'see' that a thread was already executing some lines of code. There are concepts of recursive mutexes etc, but this example was only meant to show you the basic concept. Hope the example gives you a clear picture of the concept.]

With C++11 threading:

#include <iostream>
#include <thread>
#include <mutex>

std::mutex m;//you can use std::lock_guard if you want to be exception safe
int i = 0;

void makeACallFromPhoneBooth() 
{
    m.lock();//man gets a hold of the phone booth door and locks it. The other men wait outside
      //man happily talks to his wife from now....
      std::cout << i << " Hello Wife" << std::endl;
      i++;//no other thread can access variable i until m.unlock() is called
      //...until now, with no interruption from other men
    m.unlock();//man lets go of the door handle and unlocks the door
}

int main() 
{
    //This is the main crowd of people uninterested in making a phone call

    //man1 leaves the crowd to go to the phone booth
    std::thread man1(makeACallFromPhoneBooth);
    //Although man2 appears to start second, there's a good chance he might
    //reach the phone booth before man1
    std::thread man2(makeACallFromPhoneBooth);
    //And hey, man3 also joined the race to the booth
    std::thread man3(makeACallFromPhoneBooth);

    man1.join();//man1 finished his phone call and joins the crowd
    man2.join();//man2 finished his phone call and joins the crowd
    man3.join();//man3 finished his phone call and joins the crowd
    return 0;
}

Compile and run using g++ -std=c++0x -pthread -o thread thread.cpp;./thread

Instead of explicitly using lock and unlock, you can use brackets as shown here, if you are using a scoped lock for the advantage it provides. Scoped locks have a slight performance overhead though.

You're synchronizing twice, which is pointless and possibly slows down the code: changes while iterating over the list need a synchronnization over the entire operation, which you are doing with synchronized (in_queue_list) Using Collections.synchronizedList() is superfluous in that case (it creates a wrapper that synchronizes individual operations).

However, since you are emptying the list completely, the iterated removal of the first element is the worst possible way to do it, sice for each element all following elements have to be copied, making this an O(n^2) operation - horribly slow for larger lists.

Instead, simply call clear() - no iteration needed.

Edit: If you need the single-method synchronization of Collections.synchronizedList() later on, then this is the correct way:

List<Record> in_queue_list = Collections.synchronizedList(in_queue);
in_queue_list.clear(); // synchronized implicitly, 

But in many cases, the single-method synchronization is insufficient (e.g. for all iteration, or when you get a value, do computations based on it, and replace it with the result). In that case, you have to use manual synchronization anyway, so Collections.synchronizedList() is just useless additional overhead.

Javascript is single threaded, hence the page blocking behaviour. You can use the deferred/promise approach suggested by others, but the most basic way would be to use window.setTimeout. E.g.

function checkFlag() {
    if(flag == false) {
       window.setTimeout(checkFlag, 100); /* this checks the flag every 100 milliseconds*/
    } else {
      /* do something*/
    }
}
checkFlag();

Here is a good tutorial with further explanation: Tutorial

EDIT

As others pointed out, the best way would be to re-structure your code to use callbacks. However, this answer should give you an idea how you can 'simulate' an asynchronous behaviour with window.setTimeout.

Use the synchronized keyword.

class sample {
    private String msg=null;

    public synchronized void newmsg(String x){
        msg=x;
    }

    public synchronized string getmsg(){
        String temp=msg;
        msg=null;
        return msg;
    }
}

Using the synchronized keyword on the methods will require threads to obtain a lock on the instance of sample. Thus, if any one thread is in newmsg(), no other thread will be able to get a lock on the instance of sample, even if it were trying to invoke getmsg().

On the other hand, using synchronized methods can become a bottleneck if your methods perform long-running operations - all threads, even if they want to invoke other methods in that object that could be interleaved, will still have to wait.

IMO, in your simple example, it's ok to use synchronized methods since you actually have two methods that should not be interleaved. However, under different circumstances, it might make more sense to have a lock object to synchronize on, as shown in Joh Skeet's answer.

I use this free program to synchronize local files and directories: https://github.com/Fitus/Zaloha.sh. The repository contains a simple demo as well.

The good point: It is a bash shell script (one file only). Not a black box like other programs. Documentation is there as well. Also, with some technical talents, you can "bend" and "integrate" it to create the final solution you like.

You can use ThrowIfCancellationRequested without handling the exception!

The use of ThrowIfCancellationRequested is meant to be used from within a Task (not a Thread). When used within a Task, you do not have to handle the exception yourself (and get the Unhandled Exception error). It will result in leaving the Task, and the Task.IsCancelled property will be True. No exception handling needed.

In your specific case, change the Thread to a Task.

Task t = null;
try
{
    t = Task.Run(() => Work(cancelSource.Token), cancelSource.Token);
}

if (t.IsCancelled)
{
    Console.WriteLine("Canceled!");
}

Please also note that on certain environments and conditions (such as running on windows on dispatch level >= DISPATCH LEVEL), you cannot use mutex but rather spinlock. On unix - same thing.

Here is equivalent question on competitor stackexchange unix site: https://unix.stackexchange.com/questions/5107/why-are-spin-locks-good-choices-in-linux-kernel-design-instead-of-something-more

Info on dispatching on windows systems: http://download.microsoft.com/download/e/b/a/eba1050f-a31d-436b-9281-92cdfeae4b45/IRQL_thread.doc

You can also use as Vector instead, as vectors are thread safe and arraylist are not. Though vectors are old but they can solve your purpose easily.

But you can make your Arraylist synchronized like code given this:

Collections.synchronizedList(new ArrayList(numberOfRaceCars())); 

static object Lock = new object();

lock (Lock) 
{
// do stuff
}

This pattern does a thread-safe lazy-initialization of the instance without explicit synchronization!

public class MySingleton {

     private static class Loader {
         static final MySingleton INSTANCE = new MySingleton();
     }

     private MySingleton () {}

     public static MySingleton getInstance() {
         return Loader.INSTANCE;
     }
}

It works because it uses the class loader to do all the synchronization for you for free: The class MySingleton.Loader is first accessed inside the getInstance() method, so the Loader class loads when getInstance() is called for the first time. Further, the class loader guarantees that all static initialization is complete before you get access to the class - that's what gives you thread-safety.

It's like magic.

It's actually very similar to the enum pattern of Jhurtado, but I find the enum pattern an abuse of the enum concept (although it does work)

The for loop runs immediately to completion while all your asynchronous operations are started. When they complete some time in the future and call their callbacks, the value of your loop index variable i will be at its last value for all the callbacks.

This is because the for loop does not wait for an asynchronous operation to complete before continuing on to the next iteration of the loop and because the async callbacks are called some time in the future. Thus, the loop completes its iterations and THEN the callbacks get called when those async operations finish. As such, the loop index is "done" and sitting at its final value for all the callbacks.

To work around this, you have to uniquely save the loop index separately for each callback. In Javascript, the way to do that is to capture it in a function closure. That can either be done be creating an inline function closure specifically for this purpose (first example shown below) or you can create an external function that you pass the index to and let it maintain the index uniquely for you (second example shown below).

As of 2016, if you have a fully up-to-spec ES6 implementation of Javascript, you can also use let to define the for loop variable and it will be uniquely defined for each iteration of the for loop (third implementation below). But, note this is a late implementation feature in ES6 implementations so you have to make sure your execution environment supports that option.

Use .forEach() to iterate since it creates its own function closure

someArray.forEach(function(item, i) {
    asynchronousProcess(function(item) {
        console.log(i);
    });
});

Create Your Own Function Closure Using an IIFE

var j = 10;
for (var i = 0; i < j; i++) {
    (function(cntr) {
        // here the value of i was passed into as the argument cntr
        // and will be captured in this function closure so each
        // iteration of the loop can have it's own value
        asynchronousProcess(function() {
            console.log(cntr);
        });
    })(i);
}

Create or Modify External Function and Pass it the Variable

If you can modify the asynchronousProcess() function, then you could just pass the value in there and have the asynchronousProcess() function the cntr back to the callback like this:

var j = 10;
for (var i = 0; i < j; i++) {
    asynchronousProcess(i, function(cntr) {
        console.log(cntr);
    });
}

Use ES6 let

If you have a Javascript execution environment that fully supports ES6, you can use let in your for loop like this:

const j = 10;
for (let i = 0; i < j; i++) {
    asynchronousProcess(function() {
        console.log(i);
    });
}

let declared in a for loop declaration like this will create a unique value of i for each invocation of the loop (which is what you want).

Serializing with promises and async/await

If your async function returns a promise, and you want to serialize your async operations to run one after another instead of in parallel and you're running in a modern environment that supports async and await, then you have more options.

async function someFunction() {
    const j = 10;
    for (let i = 0; i < j; i++) {
        // wait for the promise to resolve before advancing the for loop
        await asynchronousProcess();
        console.log(i);
    }
}

This will make sure that only one call to asynchronousProcess() is in flight at a time and the for loop won't even advance until each one is done. This is different than the previous schemes that all ran your asynchronous operations in parallel so it depends entirely upon which design you want. Note: await works with a promise so your function has to return a promise that is resolved/rejected when the asynchronous operation is complete. Also, note that in order to use await, the containing function must be declared async.

Run asynchronous operations in parallel and use Promise.all() to collect results in order

 function someFunction() {
     let promises = [];
     for (let i = 0; i < 10; i++) {
          promises.push(asynchonousProcessThatReturnsPromise());
     }
     return Promise.all(promises);
 }

 someFunction().then(results => {
     // array of results in order here
     console.log(results);
 }).catch(err => {
     console.log(err);
 });

lock is actually hidden Monitor class.

Well, firstly it should be pointed out that:

public void blah() {
  synchronized (this) {
    // do stuff
  }
}

is semantically equivalent to:

public synchronized void blah() {
  // do stuff
}

which is one reason not to use synchronized(this). You might argue that you can do stuff around the synchronized(this) block. The usual reason is to try and avoid having to do the synchronized check at all, which leads to all sorts of concurrency problems, specifically the double checked-locking problem, which just goes to show how difficult it can be to make a relatively simple check threadsafe.

A private lock is a defensive mechanism, which is never a bad idea.

Also, as you alluded to, private locks can control granularity. One set of operations on an object might be totally unrelated to another but synchronized(this) will mutually exclude access to all of them.

synchronized(this) just really doesn't give you anything.

public class ThreadEvenOdd {
  static int cnt=0;
  public static void main(String[] args) {

    Thread t1 = new Thread(new Runnable() {

      @Override
      public void run() {
        synchronized(this) {
          while(cnt<101) {
            if(cnt%2==0) {
              System.out.print(cnt+" ");
              cnt++;
            }
            notifyAll();
          }
        }
      }

    });
    Thread t2 = new Thread(new Runnable() {

      @Override
      public void run() {
        synchronized(this) {
          while(cnt<101) {
            if(cnt%2==1) {
              System.out.print(cnt+" ");
              cnt++;
            }
            notifyAll();
          }
        }
      }
    });

    t1.start();
    t2.start();
  }
}

In Objective-C, a @synchronized block handles locking and unlocking (as well as possible exceptions) automatically for you. The runtime dynamically essentially generates an NSRecursiveLock that is associated with the object you're synchronizing on. This Apple documentation explains it in more detail. This is why you're not seeing the log messages from your NSLock subclass — the object you synchronize on can be anything, not just an NSLock.

Basically, @synchronized (...) is a convenience construct that streamlines your code. Like most simplifying abstractions, it has associated overhead (think of it as a hidden cost), and it's good to be aware of that, but raw performance is probably not the supreme goal when using such constructs anyway.

This has been answered well by Raynos. Yet there have been changes in the sequence library since the answer has been posted.

To get sequence working, follow this link: https://github.com/FuturesJS/sequence/tree/9daf0000289954b85c0925119821752fbfb3521e.

This is how you can get it working after npm install sequence:

var seq = require('sequence').Sequence;
var sequence = seq.create();

seq.then(function call 1).then(function call 2);

I would like to add some more things on top of Bert F answer.

Locks support various methods for finer grained lock control, which are more expressive than implicit monitors (synchronized locks)

A Lock provides exclusive access to a shared resource: only one thread at a time can acquire the lock and all access to the shared resource requires that the lock be acquired first. However, some locks may allow concurrent access to a shared resource, such as the read lock of a ReadWriteLock.

Advantages of Lock over Synchronization from documentation page

1. The use of synchronized methods or statements provides access to the implicit monitor lock associated with every object, but forces all lock acquisition and release to occur in a block-structured way

2. Lock implementations provide additional functionality over the use of synchronized methods and statements by providing a non-blocking attempt to acquire a lock (tryLock()), an attempt to acquire the lock that can be interrupted (lockInterruptibly(), and an attempt to acquire the lock that can timeout (tryLock(long, TimeUnit)).

3. A Lock class can also provide behavior and semantics that is quite different from that of the implicit monitor lock, such as guaranteed ordering, non-reentrant usage, or deadlock detection

ReentrantLock: In simple terms as per my understanding, ReentrantLock allows an object to re-enter from one critical section to other critical section . Since you already have lock to enter one critical section, you can other critical section on same object by using current lock.

ReentrantLock key features as per this article

1. Ability to lock interruptibly.
2. Ability to timeout while waiting for lock.
3. Power to create fair lock.
4. API to get list of waiting thread for lock.
5. Flexibility to try for lock without blocking.

You can use ReentrantReadWriteLock.ReadLock, ReentrantReadWriteLock.WriteLock to further acquire control on granular locking on read and write operations.

Apart from these three ReentrantLocks, java 8 provides one more Lock

StampedLock:

Java 8 ships with a new kind of lock called StampedLock which also support read and write locks just like in the example above. In contrast to ReadWriteLock the locking methods of a StampedLock return a stamp represented by a long value.

You can use these stamps to either release a lock or to check if the lock is still valid. Additionally stamped locks support another lock mode called optimistic locking.

Have a look at this article on usage of different type of ReentrantLock and StampedLock locks.

Declaring a variable as volatile means that modifying its value immediately affects the actual memory storage for the variable. The compiler cannot optimize away any references made to the variable. This guarantees that when one thread modifies the variable, all other threads see the new value immediately. (This is not guaranteed for non-volatile variables.)

Declaring an atomic variable guarantees that operations made on the variable occur in an atomic fashion, i.e., that all of the substeps of the operation are completed within the thread they are executed and are not interrupted by other threads. For example, an increment-and-test operation requires the variable to be incremented and then compared to another value; an atomic operation guarantees that both of these steps will be completed as if they were a single indivisible/uninterruptible operation.

Synchronizing all accesses to a variable allows only a single thread at a time to access the variable, and forces all other threads to wait for that accessing thread to release its access to the variable.

Synchronized access is similar to atomic access, but the atomic operations are generally implemented at a lower level of programming. Also, it is entirely possible to synchronize only some accesses to a variable and allow other accesses to be unsynchronized (e.g., synchronize all writes to a variable but none of the reads from it).

Atomicity, synchronization, and volatility are independent attributes, but are typically used in combination to enforce proper thread cooperation for accessing variables.

Addendum (April 2016)

Synchronized access to a variable is usually implemented using a monitor or semaphore. These are low-level mutex (mutual exclusion) mechanisms that allow a thread to acquire control of a variable or block of code exclusively, forcing all other threads to wait if they also attempt to acquire the same mutex. Once the owning thread releases the mutex, another thread can acquire the mutex in turn.

Addendum (July 2016)

Synchronization occurs on an object. This means that calling a synchronized method of a class will lock the this object of the call. Static synchronized methods will lock the Class object itself.

Likewise, entering a synchronized block requires locking the this object of the method.

This means that a synchronized method (or block) can be executing in multiple threads at the same time if they are locking on different objects, but only one thread can execute a synchronized method (or block) at a time for any given single object.

Difference between synchronized block and synchronized method are following:

1. synchronized block reduce scope of lock, but synchronized method's scope of lock is whole method.
2. synchronized block has better performance as only the critical section is locked but synchronized method has poor performance than block.
3. synchronized block provide granular control over lock but synchronized method lock either on current object represented by this or class level lock.
4. synchronized block can throw NullPointerException but synchronized method doesn't throw.

5. synchronized block: synchronized(this){}

   synchronized method: public synchronized void fun(){}

The way you have synchronized is correct. But there is a catch

1. Synchronized wrapper provided by Collection framework ensures that the method calls I.e add/get/contains will run mutually exclusive.

However in real world you would generally query the map before putting in the value. Hence you would need to do two operations and hence a synchronized block is needed. So the way you have used it is correct. However.

2. You could have used a concurrent implementation of Map available in Collection framework. 'ConcurrentHashMap' benefit is

a. It has a API 'putIfAbsent' which would do the same stuff but in a more efficient manner.

b. Its Efficient: dThe CocurrentMap just locks keys hence its not blocking the whole map's world. Where as you have blocked keys as well as values.

c. You could have passed the reference of your map object somewhere else in your codebase where you/other dev in your tean may end up using it incorrectly. I.e he may just all add() or get() without locking on the map's object. Hence his call won't run mutually exclusive to your sync block. But using a concurrent implementation gives you a peace of mind that it can never be used/implemented incorrectly.

All the above answers are of good quality,but this one's just to memorize.The name Mutex is derived from Mutually Exclusive hence you are motivated to think of a mutex lock as Mutual Exclusion between two as in only one at a time,and if I possessed it you can have it only after I release it.On the other hand such case doesn't exist for Semaphore is just like a traffic signal(which the word Semaphore also means).

The problem appears to be that you are reinitializing the list to an empty list in each iteration:

while choice != 0:
    ...
    a = []
    a.append(s)

Try moving the initialization above the loop so that it is executed only once.

a = []
while choice != 0:
    ...
    a.append(s)

Ensure that your network is brought down before loading module:

sudo stop networking

It helped me - https://help.ubuntu.com/community/UbuntuBonding

"volatile" does not replace Interlocked.Increment! It just makes sure that the variable is not cached, but used directly.

Incrementing a variable requires actually three operations:

1. read
2. increment
3. write

Interlocked.Increment performs all three parts as a single atomic operation.

Just for completeness, here's a variant that uses print() (works on Python 2.6-3.x):

from __future__ import print_function
try: from cStringIO import StringIO
except ImportError:
     from io import StringIO

def to_int(nums, _s = StringIO()):
    print(*nums, sep='', end='', file=_s)
    s = _s.getvalue()
    _s.truncate(0)
    return int(s)

Time performance of different solutions

I've measured performance of @cdleary's functions. The results are slightly different.

Each function tested with the input list generated by:

def randrange1_10(digit_count): # same as @cdleary
    return [random.randrange(1, 10) for i in xrange(digit_count)]

You may supply your own function via --sequence-creator=yourmodule.yourfunction command-line argument (see below).

The fastest functions for a given number of integers in a list (len(nums) == digit_count) are:

• len(nums) in 1..30

  def _accumulator(nums):
      tot = 0
      for num in nums:
          tot *= 10
          tot += num
      return tot
  

• len(nums) in 30..1000

  def _map(nums):
      return int(''.join(map(str, nums)))
  
  def _imap(nums):
      return int(''.join(imap(str, nums)))
  

|------------------------------+-------------------|
| Fitting polynom              | Function          |
|------------------------------+-------------------|
| 1.00  log2(N)   +  1.25e-015 | N                 |
| 2.00  log2(N)   +  5.31e-018 | N*N               |
| 1.19  log2(N)   +      1.116 | N*log2(N)         |
| 1.37  log2(N)   +      2.232 | N*log2(N)*log2(N) |
|------------------------------+-------------------|
| 1.21  log2(N)   +      0.063 | _interpolation    |
| 1.24  log2(N)   -      0.610 | _genexp           |
| 1.25  log2(N)   -      0.968 | _imap             |
| 1.30  log2(N)   -      1.917 | _map              |

To plot the first figure download cdleary.py and make-figures.py and run (numpy and matplotlib must be installed to plot):

$ python cdleary.py 

Or

$ python make-figures.py --sort-function=cdleary._map \
> --sort-function=cdleary._imap \
> --sort-function=cdleary._interpolation \
> --sort-function=cdleary._genexp --sort-function=cdleary._sum \
> --sort-function=cdleary._reduce --sort-function=cdleary._builtins \
> --sort-function=cdleary._accumulator \
> --sequence-creator=cdleary.randrange1_10 --maxn=1000 

Had this issue today on iOS 8 & 9 and it seems that we now need to add height: 100%;

So add

html,
body {
  position: relative;
  height: 100%;
  overflow: hidden;
}

Working on Angular 8 No need to import ChangeDector

ngIf allows you not to load the element and avoid adding more stress to your application. Here's how I got it running without ChangeDetector

elem: ElementRef;

@ViewChild('elemOnHTML', {static: false}) set elemOnHTML(elemOnHTML: ElementRef) {
    if (!!elemOnHTML) {
      this.elem = elemOnHTML;
    }
}

Then when I change my ngIf value to be truthy I would use setTimeout like this for it to wait only for the next change cycle:

  this.showElem = true;
  console.log(this.elem); // undefined here
  setTimeout(() => {
    console.log(this.elem); // back here through ViewChild set
    this.elem.do();
  });

This also allowed me to avoid using any additional libraries or imports.

I'm not sure whether I understand your question correctly, but you can write your code in this way:

bool DoesEntityExist<T>(T instance, ....)

You can call the method in following fashion:

DoesEntityExist(myTypeInstance, ...)

This way you don't need to explicitly write the type, the framework will overtake the type automatically from the instance.

When the translate3d doesn't work, try to add perspective. It always works for me

transform: translate3d(0, 0, 0);
-webkit-transform: translate3d(0, 0, 0);
perspective: 1000;
-webkit-perspective: 1000;

http://blog.teamtreehouse.com/increase-your-sites-performance-with-hardware-accelerated-css

You can use cut with a delimiter like this:

with space delim:

cut -d " " -f1-100,1000-1005 infile.csv > outfile.csv

with tab delim:

cut -d$'\t' -f1-100,1000-1005 infile.csv > outfile.csv

I gave you the version of cut in which you can extract a list of intervals...

Hope it helps!

Use arrow function:

Request.prototype.start = () => {
    if( this.stay_open == true ) {
        this.open({msg: 'listen'});
    } else {

    }
};

To be certain that a folder exists (and not a file) I use this function:

Public Function FolderExists(strFolderPath As String) As Boolean
    On Error Resume Next
    FolderExists = ((GetAttr(strFolderPath) And vbDirectory) = vbDirectory)
    On Error GoTo 0
End Function

It works both, with \ at the end and without.

Now in Swift 4.2 you can use pngData() new instance method of UIImage to get the data from the image

let profileImage = UIImage(named:"profile")!
let imageData = profileImage.pngData()

The ubuntu package name is qt5-default, not qt.

using Microsoft.Office.Interop.Excel;

string path = "C:\\Projects\\ExcelSingleValue\\Test.xlsx ";

Application excel = new Application();
Workbook wb = excel.Workbooks.Open(path);
Worksheet excelSheet = wb.ActiveSheet;

//Read the first cell
string test = excelSheet.Cells[1, 1].Value.ToString();

wb.Close();

This example used the 'Microsoft Excel 15.0 Object Library' but may be compatible with earlier versions of Interop and other libraries.

This is the way I do the pattern match:

val result = JSON.parseFull(jsonStr)
result match {
  // Matches if jsonStr is valid JSON and represents a Map of Strings to Any
  case Some(map: Map[String, Any]) => println(map)
  case None => println("Parsing failed")
  case other => println("Unknown data structure: " + other)
}

Before considering making Read Call Log or Read SMS permissions a part of your application I strongly advise you to have a look at this policy of Google Play Market: https://support.google.com/googleplay/android-developer/answer/9047303?hl=en

Those permissions are very sensitive and you will have to prove that your application needs them. But even if it really needs them Google Play Support team may easily reject your request without proper explanations.

This is what happened to me. After providing all the needed information along with the Demonstration video of my application it was rejected with the explanation that my "account is not authorized to provide a certain use case solution in my application" (the list of use cases they may consider as an exception is listed on that Policy page). No link to any policy statement was provided to explain what it all means. Basically they just judged my app as not to go without proper explanation.

I wish you good luck of cause with your applications guys but be careful.

As explained in other answers it converts the variable to a number. Specially useful when d can be either a number or a string that evaluates to a number.

Example (using the addMonths function in the question):

addMonths(34,1,true);
addMonths("34",1,true);

then the +d will evaluate to a number in all cases. Thus avoiding the need to check for the type and take different code paths depending on whether d is a number, a function or a string that can be converted to a number.

You could create a helper function:

def re_match_group(pattern, str, out_groups):
    del out_groups[:]
    result = re.match(pattern, str)
    if result:
        out_groups[:len(result.groups())] = result.groups()
    return result

And then use it like this:

groups = []
if re_match_group("I love (\w+)", statement, groups):
    print "He loves", groups[0]
elif re_match_group("Ich liebe (\w+)", statement, groups):
    print "Er liebt", groups[0]
elif re_match_group("Je t'aime (\w+)", statement, groups):
    print "Il aime", groups[0]

It's a little clunky, but it gets the job done.

The problem is that Elements only takes the direct child elements of whatever you call it on. If you want all descendants, use the Descendants method:

var query = from c in xmlFile.Descendants("Band")

This is just torazaburo's answer, updated to use a MouseEvent object.

function click(x, y)
{
    var ev = new MouseEvent('click', {
        'view': window,
        'bubbles': true,
        'cancelable': true,
        'screenX': x,
        'screenY': y
    });

    var el = document.elementFromPoint(x, y);

    el.dispatchEvent(ev);
}

use a cursor

ADDENDUM: [MS SQL cursor example]

declare @field1 int
declare @field2 int
declare cur CURSOR LOCAL for
    select field1, field2 from sometable where someotherfield is null

open cur

fetch next from cur into @field1, @field2

while @@FETCH_STATUS = 0 BEGIN

    --execute your sproc on each row
    exec uspYourSproc @field1, @field2

    fetch next from cur into @field1, @field2
END

close cur
deallocate cur

in MS SQL, here's an example article

note that cursors are slower than set-based operations, but faster than manual while-loops; more details in this SO question

ADDENDUM 2: if you will be processing more than just a few records, pull them into a temp table first and run the cursor over the temp table; this will prevent SQL from escalating into table-locks and speed up operation

ADDENDUM 3: and of course, if you can inline whatever your stored procedure is doing to each user ID and run the whole thing as a single SQL update statement, that would be optimal

With awk:

     curl  -sS http://the_repo/com/stackoverflow/the_artifact/maven-metadata.xml | grep latest | awk -F'<latest>' '{print $2}' | awk -F'</latest>' '{print $1}'

With sed:

    curl  -sS http://the_repo/com/stackoverflow/the_artifact/maven-metadata.xml | grep latest | sed 's:<latest>::' | sed 's:</latest>::'

javac -d C:\xxx\lib\ -classpath C:\xxx\lib\ *.java

cmd cd C:\xxx\yourbat.bat

the second command make your cmd window not be closed. The important thing is you still able to input new command

Here are some examples of how to use Shell in VBA.
Open stackoverflow in Chrome.

Call Shell("C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" & _
 " -url" & " " & "www.stackoverflow.com",vbMaximizedFocus)

Open some text file.

Call Shell ("notepad C:\Users\user\Desktop\temp\TEST.txt")

Open some application.

Call Shell("C:\Temp\TestApplication.exe",vbNormalFocus)

Hope this helps!

Use DataFrameWriter.saveAsTable. (df.write.saveAsTable(...)) See Spark SQL and DataFrame Guide.

If you want to create static files, you can use Node.js File System Library to do that. But if you are looking for a way to create dynamic files as a result of your database or similar queries then you will need a template engine like SWIG. Besides these options you can always create HTML files as you would normally do and serve them over Node.js. To do that, you can read data from HTML files with Node.js File System and write it into response. A simple example would be:

var http = require('http');
var fs   = require('fs');

http.createServer(function (req, res) {
  fs.readFile(req.params.filepath, function (err, content) {
    if(!err) {
      res.end(content);
    } else {
      res.end('404');
    }
  }
}).listen(3000);

But I suggest you to look into some frameworks like Express for more useful solutions.

Best way would be to declare Boolean variable within the code block and return it at end of code, like this:

public boolean Test(){
    boolean booleanFlag= true; 
    if (A>B)
    {booleanFlag= true;}
    else 
    {booleanFlag = false;}
    return booleanFlag;

}

I find this the best way.

You can call the method newLine() provided by java, to insert the new line in to a file.

For more refernce -http://download.oracle.com/javase/1.4.2/docs/api/java/io/BufferedWriter.html#newLine()

Convert all type of strings

var array = (new Function("return [" + str+ "];")());



var string = "0,1";

var objectstring = '{Name:"Tshirt", CatGroupName:"Clothes", Gender:"male-female"}, {Name:"Dress", CatGroupName:"Clothes", Gender:"female"}, {Name:"Belt", CatGroupName:"Leather", Gender:"child"}';

var stringArray = (new Function("return [" + string+ "];")());

var objectStringArray = (new Function("return [" + objectstring+ "];")());

JSFiddle https://jsfiddle.net/7ne9L4Lj/1/

Result in console

Some practice doesnt support object strings

- JSON.parse("[" + string + "]"); // throw error

 - string.split(",") 
// unexpected result 
   ["{Name:"Tshirt"", " CatGroupName:"Clothes"", " Gender:"male-female"}", "      {Name:"Dress"", " CatGroupName:"Clothes"", " Gender:"female"}", " {Name:"Belt"",    " CatGroupName:"Leather"", " Gender:"child"}"]

select one.*, two.meal
from table1 as one
left join table2 as two
on (one.weddingtable = two.weddingtable and one.tableseat = two.tableseat)

 <?php // IPCLOACK HOOK
if (CLOAKING_LEVEL != 4) {
    $lastupdated = date("Ymd", filemtime(FILE_BOTS));
    if ($lastupdated != date("Ymd")) {
        $lists = array(
        'http://labs.getyacg.com/spiders/google.txt',
        'http://labs.getyacg.com/spiders/inktomi.txt',
        'http://labs.getyacg.com/spiders/lycos.txt',
        'http://labs.getyacg.com/spiders/msn.txt',
        'http://labs.getyacg.com/spiders/altavista.txt',
        'http://labs.getyacg.com/spiders/askjeeves.txt',
        'http://labs.getyacg.com/spiders/wisenut.txt',
        );
        foreach($lists as $list) {
            $opt .= fetch($list);
        }
        $opt = preg_replace("/(^[\r\n]*|[\r\n]+)[\s\t]*[\r\n]+/", "\n", $opt);
        $fp =  fopen(FILE_BOTS,"w");
        fwrite($fp,$opt);
        fclose($fp);
    }
    $ip = isset($_SERVER['REMOTE_ADDR']) ? $_SERVER['REMOTE_ADDR'] : '';
    $ref = isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : '';
    $agent = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : '';
    $host = strtolower(gethostbyaddr($ip));
    $file = implode(" ", file(FILE_BOTS));
    $exp = explode(".", $ip);
    $class = $exp[0].'.'.$exp[1].'.'.$exp[2].'.';
    $threshold = CLOAKING_LEVEL;
    $cloak = 0;
    if (stristr($host, "googlebot") && stristr($host, "inktomi") && stristr($host, "msn")) {
        $cloak++;
    }
    if (stristr($file, $class)) {
        $cloak++;
    }
    if (stristr($file, $agent)) {
        $cloak++;
    }
    if (strlen($ref) > 0) {
        $cloak = 0;
    }

    if ($cloak >= $threshold) {
        $cloakdirective = 1;
    } else {
        $cloakdirective = 0;
    }
}
?>

That would be the ideal way to cloak for spiders. It's from an open source script called [YACG] - http://getyacg.com

Needs a bit of work, but definitely the way to go.

CSS 3

divContainer input[type="text"] {
    width:150px;
}

CSS2 add a class "text" to the text inputs then in your css

.divContainer.text{
    width:150px;
}

Dynamic adding jQuery, CSS from js file. When we added onload function to body we can use jQuery to create page from js file.

init();_x000D_
_x000D_
function init()_x000D_
{_x000D_
 addJQuery();_x000D_
 addBodyAndOnLoadScript();_x000D_
 addCSS();_x000D_
}_x000D_
_x000D_
function addJQuery()_x000D_
{_x000D_
 var head = document.getElementsByTagName( 'head' )[0];_x000D_
 var scriptjQuery = document.createElement( 'script' );_x000D_
 scriptjQuery.type = 'text/javascript';_x000D_
 scriptjQuery.id = 'jQuery'_x000D_
 scriptjQuery.src = 'https://code.jquery.com/jquery-3.4.1.min.js';_x000D_
 var script = document.getElementsByTagName( 'script' )[0];_x000D_
 head.insertBefore(scriptjQuery, script);_x000D_
}_x000D_
_x000D_
function addBodyAndOnLoadScript()_x000D_
{_x000D_
 var body = document.createElement('body')_x000D_
 body.onload = _x000D_
 function()_x000D_
 {_x000D_
  onloadFunction();_x000D_
 };_x000D_
}_x000D_
_x000D_
function addCSS()_x000D_
{_x000D_
 var head = document.getElementsByTagName( 'head' )[0];_x000D_
 var linkCss = document.createElement( 'link' );_x000D_
 linkCss.rel = 'stylesheet';_x000D_
 linkCss.href = 'E:/Temporary_files/temp_css.css';_x000D_
 head.appendChild( linkCss );_x000D_
}_x000D_
_x000D_
function onloadFunction()_x000D_
{_x000D_
 var body = $( 'body' );_x000D_
 body.append('<strong>Hello world</strong>');_x000D_
}

html _x000D_
{_x000D_
 background-color: #f5f5dc;_x000D_
}

<!DOCTYPE html>_x000D_
<html lang="en">_x000D_
 <head>_x000D_
  <meta charset="UTF-8">_x000D_
  <title>Temp Study HTML Page</title>_x000D_
  <script type="text/javascript" src="E:\Temporary_files\temp_script.js"></script>_x000D_
 </head>_x000D_
 <body></body>_x000D_
</html>

Simplest and flexible solution is below: Inside ${Tomcat_home}/config/server.xml

Change the autoDeploy="false" deployOnStartup="false" under Host element like below This is must.

<Host name="localhost"  appBase="webapps"
        unpackWARs="true" autoDeploy="false" deployOnStartup="false">

Add below line under Host element.

<Context path="" docBase="ServletInAction.war"  reloadable="true">
            <WatchedResource>WEB-INF/web.xml</WatchedResource>
        </Context>

With the above approach we can add as many applications under webapps with different context path names.

You are looking for str.rsplit(), with a limit:

print x.rsplit('-', 1)[0]

.rsplit() searches for the splitting string from the end of input string, and the second argument limits how many times it'll split to just once.

Another option is to use str.rpartition(), which will only ever split just once:

print x.rpartition('-')[0]

For splitting just once, str.rpartition() is the faster method as well; if you need to split more than once you can only use str.rsplit().

Demo:

>>> x = 'http://test.com/lalala-134'
>>> print x.rsplit('-', 1)[0]
http://test.com/lalala
>>> 'something-with-a-lot-of-dashes'.rsplit('-', 1)[0]
'something-with-a-lot-of'

and the same with str.rpartition()

>>> print x.rpartition('-')[0]
http://test.com/lalala
>>> 'something-with-a-lot-of-dashes'.rpartition('-')[0]
'something-with-a-lot-of'

Run this script from SharePoint 2010 Management Shell as Administrator.

nodemon is a great one. I just add more parameters for debugging and watching options.

package.json

  "scripts": {
    "dev": "cross-env NODE_ENV=development nodemon --watch server --inspect ./server/server.js"
  }

The command: nodemon --watch server --inspect ./server/server.js

Whereas:

--watch server Restart the app when changing .js, .mjs, .coffee, .litcoffee, and .json files in the server folder (included subfolders).

--inspect Enable remote debug.

./server/server.js The entry point.

Then add the following config to launch.json (VS Code) and start debugging anytime.

{
    "type": "node",
    "request": "attach",
    "name": "Attach",
    "protocol": "inspector",
    "port": 9229
}

Note that it's better to install nodemon as dev dependency of project. So your team members don't need to install it or remember the command arguments, they just npm run dev and start hacking.

See more on nodemon docs: https://github.com/remy/nodemon#monitoring-multiple-directories

The error means that you're navigating to a view whose model is declared as typeof Foo (by using @model Foo), but you actually passed it a model which is typeof Bar (note the term dictionary is used because a model is passed to the view via a ViewDataDictionary).

The error can be caused by

Passing the wrong model from a controller method to a view (or partial view)

Common examples include using a query that creates an anonymous object (or collection of anonymous objects) and passing it to the view

var model = db.Foos.Select(x => new
{
    ID = x.ID,
    Name = x.Name
};
return View(model); // passes an anonymous object to a view declared with @model Foo

or passing a collection of objects to a view that expect a single object

var model = db.Foos.Where(x => x.ID == id);
return View(model); // passes IEnumerable<Foo> to a view declared with @model Foo

The error can be easily identified at compile time by explicitly declaring the model type in the controller to match the model in the view rather than using var.

Passing the wrong model from a view to a partial view

Given the following model

public class Foo
{
    public Bar MyBar { get; set; }
}

and a main view declared with @model Foo and a partial view declared with @model Bar, then

Foo model = db.Foos.Where(x => x.ID == id).Include(x => x.Bar).FirstOrDefault();
return View(model);

will return the correct model to the main view. However the exception will be thrown if the view includes

@Html.Partial("_Bar") // or @{ Html.RenderPartial("_Bar"); }

By default, the model passed to the partial view is the model declared in the main view and you need to use

@Html.Partial("_Bar", Model.MyBar) // or @{ Html.RenderPartial("_Bar", Model.MyBar); }

to pass the instance of Bar to the partial view. Note also that if the value of MyBar is null (has not been initialized), then by default Foo will be passed to the partial, in which case, it needs to be

@Html.Partial("_Bar", new Bar())

Declaring a model in a layout

If a layout file includes a model declaration, then all views that use that layout must declare the same model, or a model that derives from that model.

If you want to include the html for a separate model in a Layout, then in the Layout, use @Html.Action(...) to call a [ChildActionOnly] method initializes that model and returns a partial view for it.

Sometimes we know in advance that the value stored in a given integer variable will always be positive-when it is being used to only count things, for example. In such a case we can declare the variable to be unsigned, as in, unsigned int num student;. With such a declaration, the range of permissible integer values (for a 32-bit compiler) will shift from the range -2147483648 to +2147483647 to range 0 to 4294967295. Thus, declaring an integer as unsigned almost doubles the size of the largest possible value that it can otherwise hold.

Another solution is to do this:

static float NextFloat(Random random)
{
    float f;
    do
    {
        byte[] bytes = new byte[4];
        random.NextBytes(bytes);
        f = BitConverter.ToSingle(bytes, 0);
    }
    while (float.IsInfinity(f) || float.IsNaN(f));
    return f;
}

add an ALIAS on the subquery,

SELECT  COUNT(made_only_recharge) AS made_only_recharge
FROM    
    (
        SELECT DISTINCT (identifiant) AS made_only_recharge
        FROM cdr_data
        WHERE CALLEDNUMBER = '0130'
        EXCEPT
        SELECT DISTINCT (identifiant) AS made_only_recharge
        FROM cdr_data
        WHERE CALLEDNUMBER != '0130'
    ) AS derivedTable                           -- <<== HERE

See http://angular-ui.github.io/bootstrap/#/collapse

function CollapseDemoCtrl($scope) {
  $scope.isCollapsed = false;
}



<div ng-controller="CollapseDemoCtrl">
    <button class="btn" ng-click="isCollapsed = !isCollapsed">Toggle collapse</button>
    <hr>
    <div collapse="isCollapsed">
        <div class="well well-large">Some content</div> 
    </div>
</div>

You can customize the standard Linkedin button like this, after the page load:

$(".IN-widget span:first-of-type").css({
                'border': '2px solid #DCDCDC',
                '-webkit-border-radius': '3px',
                '-moz-border-radius': '3px',
                'border-radius': '3px'
                });

... right now it happens only to the website I'm testing. I can't post it here because it's confidential.

Then I guess it is one of the sites which is incompatible with TLS1.2. The openssl as used in 12.04 does not use TLS1.2 on the client side while with 14.04 it uses TLS1.2 which might explain the difference. To work around try to explicitly use --secure-protocol=TLSv1. If this does not help check if you can access the site with openssl s_client -connect ... (probably not) and with openssl s_client -tls1 -no_tls1_1, -no_tls1_2 ....

Please note that it might be other causes, but this one is the most probable and without getting access to the site everything is just speculation anyway.

The assumed problem in detail: Usually clients use the most compatible handshake to access a server. This is the SSLv23 handshake which is compatible to older SSL versions but announces the best TLS version the client supports, so that the server can pick the best version. In this case wget would announce TLS1.2. But there are some broken servers which never assumed that one day there would be something like TLS1.2 and which refuse the handshake if the client announces support for this hot new version (from 2008!) instead of just responding with the best version the server supports. To access these broken servers the client has to lie and claim that it only supports TLS1.0 as the best version.

Is Ubuntu 14.04 or wget 1.15 not compatible with TLS 1.0 websites? Do I need to install/download any library/software to enable this connection?

The problem is the server, not the client. Most browsers work around these broken servers by retrying with a lower version. Most other applications fail permanently if the first connection attempt fails, i.e. they don't downgrade by itself and one has to enforce another version by some application specific settings.

if you are just getting a single value out of either (not in a loop) then both do bounds checking (you're in managed code remember) it's just the list does it twice. See the notes later for why this is likely not a big deal.

If you are using your own for(int int i = 0; i < x.[Length/Count];i++) then the key difference is as follows:

• Array:
  • bounds checking is removed
• Lists
  • bounds checking is performed

If you are using foreach then the key difference is as follows:

• Array:
  • no object is allocated to manage the iteration
  • bounds checking is removed
• List via a variable known to be List.
  • the iteration management variable is stack allocated
  • bounds checking is performed
• List via a variable known to be IList.
  • the iteration management variable is heap allocated
  • bounds checking is performed also Lists values may not be altered during the foreach whereas the array's can be.

The bounds checking is often no big deal (especially if you are on a cpu with a deep pipeline and branch prediction - the norm for most these days) but only your own profiling can tell you if that is an issue. If you are in parts of your code where you are avoiding heap allocations (good examples are libraries or in hashcode implementations) then ensuring the variable is typed as List not IList will avoid that pitfall. As always profile if it matters.

They are the same, however, the ternary operator can be used in places where it is difficult to use a if/else:

printf("Total: %d item%s", cnt, cnt != 1 ? "s" : "");

Doing that statement with an if/else, would generate a very different compiled code.

Update after 8 years...

Actually, I think this would be better:

printf(cnt == 1 ? "Total: %d item" : "Total: %d items", cnt);

(actually, I'm pretty sure you can replace the "%d" in the first string with "one")

This problem happens when older versions of java still on your system disrupt any new versions installed. To stop this problem you need to first remove all java software using - Control Panel + Remove Programs + then uninstall java. (At this stage, I recommend cleaning out your registry using CCleaner using their Registry option or similar program to ensure a clean sweep then reboot) After rebooting reinstall the most recent version of java and all will be well.

http://www.filehippo.com/download_ccleaner -LINK TO CCLEANER

Alright so after trying every solution out there to solve this exact issues on a wordpress blog, I might have done something either really stupid or genius... With no idea why there's an increase in Mysql connections, I used the php script below in my header to kill all sleeping processes..

So every visitor to my site helps in killing the sleeping processes..

<?php
$result = mysql_query("SHOW processlist");
while ($myrow = mysql_fetch_assoc($result)) {
if ($myrow['Command'] == "Sleep") {
mysql_query("KILL {$myrow['Id']}");}
}
?>

You need to follow the following steps:

Find line that read follows

Require ip 127.0.0.1

Replace with your workstation IP address:

Require ip 10.1.3.53

Again find the following line:

Allow from 127.0.0.1

Replace as follows:

Allow from 10.1.3.53

Also find deny from all and comment it in the entire file.

Save and close the file.Restart Apache httpd server:

# service httpd restart

Edit: Since this is the selected answer and gets best visibility ... please also make sure that PHP is installed, otherwise you get same Forbidden error.

I think may be more automatic, grunt task usemin take care to do all this jobs for you, only need some configuration:

https://stackoverflow.com/a/33481683/1897196

Ah I think a understand now. Have a look if this really is what you want:

$(".start").keyup(function(){
    $(this).closest('tr').find("input").each(function() {
        alert(this.value)
    });
});

This will give you all input values of a row.

Update:
To get the value of not all elements you can use :not():

$(this).closest('tr').find("input:not([name^=desc][name^=phone])").each(function() {
     alert(this.value)
});

Actually I am not 100% sure whether it works this way, maybe you have to use two nots instead of this one combining both conditions.

You want:

grep -A 5 '19:55' file

From man grep:

Context Line Control

-A NUM, --after-context=NUM

Print NUM lines of trailing context after matching lines.  
Places a line containing a gup separator (described under --group-separator) 
between contiguous groups of matches.  With the -o or --only-matching
option, this has no effect and a warning is given.

-B NUM, --before-context=NUM

Print NUM lines of leading context before matching lines.  
Places a line containing a group separator (described under --group-separator) 
between contiguous groups of matches.  With the -o or --only-matching
option, this has no effect and a warning is given.

-C NUM, -NUM, --context=NUM

Print NUM lines of output context.  Places a line containing a group separator
(described under --group-separator) between contiguous groups of matches.  
With the -o or --only-matching option,  this  has  no effect and a warning
is given.

--group-separator=SEP

Use SEP as a group separator. By default SEP is double hyphen (--).

--no-group-separator

Use empty string as a group separator.

Hey mate just remember js works by evaluating to either true or false, right?

let's take a ternary operator :

questionAnswered ? "Awesome!" : "damn" ;

First, js checks whether questionAnswered is true or false.

if true ( ? ) you will get "Awesome!"

else ( : ) you will get "damn";

Hope this helps friend :)

It's a long pointer to a constant, wide string (i.e. a string of wide characters).

Since it's a wide string, you want to make your constant look like: L"TestWindow". I wouldn't create the intermediate a either, I'd just pass L"TestWindow" for the parameter:

ghTest = FindWindowEx(NULL, NULL, NULL, L"TestWindow");

If you want to be pedantically correct, an "LPCTSTR" is a "text" string -- a wide string in a Unicode build and a narrow string in an ANSI build, so you should use the appropriate macro:

ghTest = FindWindow(NULL, NULL, NULL, _T("TestWindow"));

Few people care about producing code that can compile for both Unicode and ANSI character sets though, and if you don't getting it to really work correctly can be quite a bit of extra work for little gain. In this particular case, there's not much extra work, but if you're manipulating strings, there's a whole set of string manipulation macros that resolve to the correct functions.

Working example. Notes below.

class Animal {
    constructor(public name) {
    }

    move(meters) {
        alert(this.name + " moved " + meters + "m.");
    }
}

class Snake extends Animal {
    move() {
        alert(this.name + " is Slithering...");
        super.move(5);
    }
}

class Horse extends Animal {
    move() {
        alert(this.name + " is Galloping...");
        super.move(45);
    }
}

var sam = new Snake("Sammy the Python");
var tom: Animal = new Horse("Tommy the Palomino");

sam.move();
tom.move(34);

1. You don't need to manually assign the name to a public variable. Using public name in the constructor definition does this for you.

2. You don't need to call super(name) from the specialised classes.

3. Using this.name works.

Notes on use of super.

This is covered in more detail in section 4.9.2 of the language specification.

The behaviour of the classes inheriting from Animal is not dissimilar to the behaviour in other languages. You need to specify the super keyword in order to avoid confusion between a specialised function and the base class function. For example, if you called move() or this.move() you would be dealing with the specialised Snake or Horse function, so using super.move() explicitly calls the base class function.

There is no confusion of properties, as they are the properties of the instance. There is no difference between super.name and this.name - there is simply this.name. Otherwise you could create a Horse that had different names depending on whether you were in the specialized class or the base class.

This because in.nextInt() only receive a int number, doesn't receive a new line. So you input 3 and press "Enter", the end of line is read by in.nextline().

Here is my code:

int nnames;
String names[];

System.out.print("How many names are you going to save: ");
Scanner in = new Scanner(System.in);
nnames = in.nextInt();
in.nextLine();
names = new String[nnames];

for (int i = 0; i < names.length; i++){
        System.out.print("Type a name: ");
        names[i] = in.nextLine();
}

check this if it works it works fine for me

<script>
  var windowObjectReference;
  var strWindowFeatures = "menubar=no,location=no,resizable=no,scrollbars=no,status=yes,width=400,height=350";

     function openRequestedPopup() {
      windowObjectReference = window.open("http://www.flyingedge.in/", "CNN_WindowName", strWindowFeatures);
     }
</script>

select * from Header where userID like '%''%'

Hope this helps.

It's because there is no long in javascript.

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

To select the ith row, use iloc:

In [31]: df_test.iloc[0]
Out[31]: 
ATime     1.2
X         2.0
Y        15.0
Z         2.0
Btime     1.2
C        12.0
D        25.0
E        12.0
Name: 0, dtype: float64

To select the ith value in the Btime column you could use:

In [30]: df_test['Btime'].iloc[0]
Out[30]: 1.2

There is a difference between df_test['Btime'].iloc[0] (recommended) and df_test.iloc[0]['Btime']:

DataFrames store data in column-based blocks (where each block has a single dtype). If you select by column first, a view can be returned (which is quicker than returning a copy) and the original dtype is preserved. In contrast, if you select by row first, and if the DataFrame has columns of different dtypes, then Pandas copies the data into a new Series of object dtype. So selecting columns is a bit faster than selecting rows. Thus, although df_test.iloc[0]['Btime'] works, df_test['Btime'].iloc[0] is a little bit more efficient.

There is a big difference between the two when it comes to assignment. df_test['Btime'].iloc[0] = x affects df_test, but df_test.iloc[0]['Btime'] may not. See below for an explanation of why. Because a subtle difference in the order of indexing makes a big difference in behavior, it is better to use single indexing assignment:

df.iloc[0, df.columns.get_loc('Btime')] = x

df.iloc[0, df.columns.get_loc('Btime')] = x (recommended):

The recommended way to assign new values to a DataFrame is to avoid chained indexing, and instead use the method shown by andrew,

df.loc[df.index[n], 'Btime'] = x

or

df.iloc[n, df.columns.get_loc('Btime')] = x

The latter method is a bit faster, because df.loc has to convert the row and column labels to positional indices, so there is a little less conversion necessary if you use df.iloc instead.

df['Btime'].iloc[0] = x works, but is not recommended:

Although this works, it is taking advantage of the way DataFrames are currently implemented. There is no guarantee that Pandas has to work this way in the future. In particular, it is taking advantage of the fact that (currently) df['Btime'] always returns a view (not a copy) so df['Btime'].iloc[n] = x can be used to assign a new value at the nth location of the Btime column of df.

Since Pandas makes no explicit guarantees about when indexers return a view versus a copy, assignments that use chained indexing generally always raise a SettingWithCopyWarning even though in this case the assignment succeeds in modifying df:

In [22]: df = pd.DataFrame({'foo':list('ABC')}, index=[0,2,1])
In [24]: df['bar'] = 100
In [25]: df['bar'].iloc[0] = 99
/home/unutbu/data/binky/bin/ipython:1: SettingWithCopyWarning: 
A value is trying to be set on a copy of a slice from a DataFrame

See the caveats in the documentation: http://pandas.pydata.org/pandas-docs/stable/indexing.html#indexing-view-versus-copy
  self._setitem_with_indexer(indexer, value)

In [26]: df
Out[26]: 
  foo  bar
0   A   99  <-- assignment succeeded
2   B  100
1   C  100

df.iloc[0]['Btime'] = x does not work:

In contrast, assignment with df.iloc[0]['bar'] = 123 does not work because df.iloc[0] is returning a copy:

In [66]: df.iloc[0]['bar'] = 123
/home/unutbu/data/binky/bin/ipython:1: SettingWithCopyWarning: 
A value is trying to be set on a copy of a slice from a DataFrame

See the caveats in the documentation: http://pandas.pydata.org/pandas-docs/stable/indexing.html#indexing-view-versus-copy

In [67]: df
Out[67]: 
  foo  bar
0   A   99  <-- assignment failed
2   B  100
1   C  100

Warning: I had previously suggested df_test.ix[i, 'Btime']. But this is not guaranteed to give you the ith value since ix tries to index by label before trying to index by position. So if the DataFrame has an integer index which is not in sorted order starting at 0, then using ix[i] will return the row labeled i rather than the ith row. For example,

In [1]: df = pd.DataFrame({'foo':list('ABC')}, index=[0,2,1])

In [2]: df
Out[2]: 
  foo
0   A
2   B
1   C

In [4]: df.ix[1, 'foo']
Out[4]: 'C'

If the format is that simple (a space separates the number from the rest) then

int(str1.split()[0])

would do it

This might work:

public int binaryToInteger(String binary) {
    char[] numbers = binary.toCharArray();
    int result = 0;
    for(int i=numbers.length - 1; i>=0; i--)
        if(numbers[i]=='1')
            result += Math.pow(2, (numbers.length-i - 1));
    return result;
}

if you want to use mongoexport and mongoimport to export/import each collection from database, I think this utility can be helpful for you. I've used similar utility couple of times;

LOADING=false

usage()
{
    cat << EOF
    usage: $0 [options] dbname

    OPTIONS:
        -h      Show this help.
        -l      Load instead of export
        -u      Mongo username
        -p      Mongo password
        -H      Mongo host string (ex. localhost:27017)
EOF
}

while getopts "hlu:p:H:" opt; do
    MAXOPTIND=$OPTIND

    case $opt in 
        h)
            usage
            exit
            ;;
        l)
            LOADING=true
            ;;
        u)
            USERNAME="$OPTARG"
            ;;
        p) 
            PASSWORD="$OPTARG"
            ;;
        H)
            HOST="$OPTARG"
            ;;
        \?)
            echo "Invalid option $opt"
            exit 1
            ;;
    esac
done

shift $(($MAXOPTIND-1))

if [ -z "$1" ]; then
    echo "Usage: export-mongo [opts] <dbname>"
    exit 1
fi

DB="$1"
if [ -z "$HOST" ]; then
    CONN="localhost:27017/$DB"
else
    CONN="$HOST/$DB"
fi

ARGS=""
if [ -n "$USERNAME" ]; then
    ARGS="-u $USERNAME"
fi
if [ -n "$PASSWORD" ]; then
    ARGS="$ARGS -p $PASSWORD"
fi

echo "*************************** Mongo Export ************************"
echo "**** Host:      $HOST"
echo "**** Database:  $DB"
echo "**** Username:  $USERNAME"
echo "**** Password:  $PASSWORD"
echo "**** Loading:   $LOADING"
echo "*****************************************************************"

if $LOADING ; then
    echo "Loading into $CONN"
    tar -xzf $DB.tar.gz
    pushd $DB >/dev/null

    for path in *.json; do
        collection=${path%.json}
        echo "Loading into $DB/$collection from $path"
        mongoimport $ARGS -d $DB -c $collection $path
    done

    popd >/dev/null
    rm -rf $DB
else
    DATABASE_COLLECTIONS=$(mongo $CONN $ARGS --quiet --eval 'db.getCollectionNames()' | sed 's/,/ /g')

    mkdir /tmp/$DB
    pushd /tmp/$DB 2>/dev/null

    for collection in $DATABASE_COLLECTIONS; do
        mongoexport --host $HOST -u $USERNAME -p $PASSWORD -db $DB -c $collection --jsonArray -o $collection.json >/dev/null
    done

    pushd /tmp 2>/dev/null
    tar -czf "$DB.tar.gz" $DB 2>/dev/null
    popd 2>/dev/null
    popd 2>/dev/null
    mv /tmp/$DB.tar.gz ./ 2>/dev/null
    rm -rf /tmp/$DB 2>/dev/null
fi

You make a good point that you can avoid some number of joined queries by using what's called a natural key instead of a surrogate key. Only you can assess if the benefit of this is significant in your application.

That is, you can measure the queries in your application that are the most important to be speedy, because they work with large volumes of data or they are executed very frequently. If these queries benefit from eliminating a join, and do not suffer by using a varchar primary key, then do it.

Don't use either strategy for all tables in your database. It's likely that in some cases, a natural key is better, but in other cases a surrogate key is better.

Other folks make a good point that it's rare in practice for a natural key to never change or have duplicates, so surrogate keys are usually worthwhile.

To use an image for body background in CSS

body {
  background-image: url("image.jpg");
}

Access is a great multi-user database. It has lots of built in features to handle the multi-user situation. In fact, it is so very popular because it is such a great multi-user database. There is an upper limit on how many users can all use the database at the same time doing updates and edits - depending on how knowledgeable the developer is about access and how the database has been designed - anywhere from 20 users to approx 50 users. Some access databases can be built to handle up to 50 concurrent users, while many others can handle 20 or 25 concurrent users updating the database. These figures have been observed for databases that have been in use for several or more years and have been discussed many times on the access newsgroups.

If you bind events to the onmouseover and onmouseout events in Jquery, you can then trigger that effect using mouseenter().

What are you trying to accomplish?

As mentioned above markdown itself leaves you hanging on this. However, depending on the implementation there are some workarounds:

At least one version of MD considers <div> to be a block level tag but <DIV> is just text. All broswers however are case insensitive. This allows you to keep the syntax simplicity of MD, at the cost of adding div container tags.

So the following is a workaround:

<DIV class=foo>

  Paragraphs here inherit class foo from above.

</div>

The downside of this is that the output code has <p> tags wrapping the <div> lines (both of them, the first because it's not and the second because it doesn't match. No browser fusses about this that I've found, but the code won't validate. MD tends to put in spare <p> tags anyway.

Several versions of markdown implement the convention <tag markdown="1"> in which case MD will do the normal processing inside the tag. The above example becomes:

<div markdown="1" class=foo>

  Paragraphs here inherit class foo from above.

</div>

The current version of Fletcher's MultiMarkdown allows attributes to follow the link if using referenced links.

In Laravel 5.5:

return back()->withErrors($arrayWithErrors);

In the view using Blade:

@if($errors->has())
    <ul>
    @foreach ($errors->all() as $error)
        <li>{{ $error }}</li>
    @endforeach
    </ul>
@endif

Assign the second variable for the $.each function() as well, makes it lot easier as it'll provide you the data (so you won't have to work with the indicies).

$.each(json, function(arrayID,group) {
            console.log('<a href="'+group.GROUP_ID+'">');
    $.each(group.EVENTS, function(eventID,eventData) {
            console.log('<p>'+eventData.SHORT_DESC+'</p>');
     });
});

Should print out everything you were trying in your question.

http://jsfiddle.net/niklasvh/hZsQS/

edit renamed the variables to make it bit easier to understand what is what.

I have struggled a long time to modify the extension attributes in our domain. Then I wrote a powershell script and created an editor with a GUI to set and remove extAttributes from an account.

If you like, you can take a look at it at http://toolbocks.de/viewtopic.php?f=3&t=4

I'm sorry, that the description in the text is in German. The GUI itself is in English.

I use this script on a regular basis in our domain and it never deleted anything or did any other harm. I provide no guarantee, that this script works as expected in your domain. But as I provide the source, you can (and should) have a look at it, before you run it.

Why javascript when you can use just css?

a[aria-expanded="true"]{_x000D_
  background-color: #42DCA3;_x000D_
}

<li class="active">_x000D_
   <a href="#3a" class="btn btn-default btn-lg" data-toggle="tab" aria-expanded="true"> _x000D_
       <span class="network-name">Google+</span>_x000D_
   </a>_x000D_
</li>_x000D_
<li class="active">_x000D_
   <a href="#3a" class="btn btn-default btn-lg" data-toggle="tab" aria-expanded="false"> _x000D_
       <span class="network-name">Google+</span>_x000D_
   </a>_x000D_
</li>

I think you can also think of alternative architectures. Sometimes something can be done in another way much more easier. If the producer of HTML file is you, then you can write an HTTP handler to create an Excel document on the server (which is much more easier than in JavaScript) and send a file to the client. If you receive that HTML file from somewhere (like an HTML version of a report), then you still can use a server side language like C# or PHP to create the Excel file still very easily. I mean, you may have other ways too. :)

define() is part of the AMD spec of js

See:

• https://github.com/amdjs/amdjs-api/wiki/AMD

Edit: Also see Claudio's answer below. Likely the more relevant explanation.

you can Try the following snippet:

var str = "How are you doing today?";
var res = str.split("o");
console.log("My Result:",res)

and your output like that

My Result: H,w are y,u d,ing t,day?

You can use Pandas library to read the first few lines from the huge dataset.

import pandas as pd

data = pd.read_csv("names.csv", nrows=1)

You can mention the number of lines to be read in the nrows parameter.

You can also try:

string res = string.Join("", sample.Split(Environment.NewLine.ToCharArray())

Environment.NewLine should make it independent of platform.

Recommended Read:

Environment.NewLine Property

You can find a few examples here:

// Fill the DataSet.
DataSet ds = new DataSet();
ds.Locale = CultureInfo.InvariantCulture;
FillDataSet(ds);

DataTable contacts = ds.Tables["Contact"];
DataTable orders = ds.Tables["SalesOrderHeader"];

var query =
    contacts.AsEnumerable().Join(orders.AsEnumerable(),
    order => order.Field<Int32>("ContactID"),
    contact => contact.Field<Int32>("ContactID"),
    (contact, order) => new
    {
        ContactID = contact.Field<Int32>("ContactID"),
        SalesOrderID = order.Field<Int32>("SalesOrderID"),
        FirstName = contact.Field<string>("FirstName"),
        Lastname = contact.Field<string>("Lastname"),
        TotalDue = order.Field<decimal>("TotalDue")
    });


foreach (var contact_order in query)
{
    Console.WriteLine("ContactID: {0} "
                    + "SalesOrderID: {1} "
                    + "FirstName: {2} "
                    + "Lastname: {3} "
                    + "TotalDue: {4}",
        contact_order.ContactID,
        contact_order.SalesOrderID,
        contact_order.FirstName,
        contact_order.Lastname,
        contact_order.TotalDue);
}

Or just google for 'linq join method syntax'.

The method .transpose() converts columns to rows and rows to column, hence you could even write

df.transpose().ix[3]

You can unload a ClassLoader but you cannot unload specific classes. More specifically you cannot unload classes created in a ClassLoader that's not under your control.

If possible, I suggest using your own ClassLoader so you can unload.

you can use the return statement without any parameter to exit a function

def foo(element):
    do something
    if check is true:
        do more (because check was succesful)
    else:
        return
    do much much more...

or raise an exception if you want to be informed of the problem

def foo(element):
    do something
    if check is true:
        do more (because check was succesful)
    else:
        raise Exception("cause of the problem")
    do much much more...

This should take care of Tina's null outputFileUri issue:

private static final String STORED_INSTANCE_KEY_FILE_URI = "output_file_uri";

@Override
public void onSaveInstanceState( Bundle outState ) {
    super.onSaveInstanceState( outState );

    if ( outputFileUri != null ) {
        outState.putString( STORED_INSTANCE_KEY_FILE_URI, outputFileUri.toString() );
    }
}

@Override
public void onViewStateRestored( Bundle savedInstanceState ) {
    super.onViewStateRestored( savedInstanceState );

    if ( savedInstanceState != null ) {
      final String outputFileUriStr = savedInstanceState.getString( STORED_INSTANCE_KEY_FILE_URI );
      if ( outputFileUriStr != null && !outputFileUriStr.isEmpty() ) {
          outputFileUri = Uri.parse( outputFileUriStr );
      }
    }
}

Note: I'm using this code inside android.support.v4.app.Fragment your overridden methods might change depending on what Fragment/Activity version you're using.

perhaps this is what you're looking for: https://github.com/android/platform_frameworks_base/blob/master/core/res/res/values/colors.xml

This works for me for BlueStacks 4:

• Install "Rotation Control" app
• Enable it to appear onto taskbar; optionally with system start
• Whenever you want to rotate the screen, just pull down the task bar, and give it a go

Swift 3

Not sure about you guys, but I'm having a hard time with this one. I did something like this:

if let window = UIApplication.shared.delegate?.window {
    if var viewController = window?.rootViewController {
        // handle navigation controllers
        if(viewController is UINavigationController){
            viewController = (viewController as! UINavigationController).visibleViewController!
        }
        print(viewController)
    }
}

I kept getting the initial view controller of my app. For some reason it wanted to stay the root view controller no matter what. So I just made a global string type variable currentViewController and set its value myself in each viewDidLoad(). All I needed was to tell which screen I was on & this works perfectly for me.

I upgraded to "prettier": "^2.2.0" and error went away

To get the value of cell, use the following syntax,

datagridviewName(columnFirst, rowSecond).value

But the intellisense and MSDN documentation is wrongly saying rowFirst, colSecond approach...

I have never used jekyll, but it's main page says that it uses Liquid, and according to their docs, I think the following should work:

<ul> {% for page in site.pages %}     {% if page.title != 'index' %}     <li><div class="drvce"><a href="{{ page.url }}">{{ page.title }}</a></div></li>     {% endif %} {% endfor %} </ul> 

Just simply open a batch file that contains this two lines in the same folder of your python script:

somescript.py
pause

Here's a method that should do the job just right.

public byte[] toByteArray(int value)
{
    final byte[] destination = new byte[Integer.BYTES];
    for(int index = Integer.BYTES - 1; index >= 0; index--)
    {
        destination[i] = (byte) value;
        value = value >> 8;
    };
    return destination;
};

shell_exec - Execute command via shell and return the complete output as a string

exec - Execute an external program.

The difference is that with shell_exec you get output as a return value.

You might be better off if you just don't use nested classes. If you must nest, try this:

x = 1
class OuterClass:
    outer_var = x
    class InnerClass:
        inner_var = x

Or declare both classes before nesting them:

class OuterClass:
    outer_var = 1

class InnerClass:
    inner_var = OuterClass.outer_var

OuterClass.InnerClass = InnerClass

(After this you can del InnerClass if you need to.)

Updated(from @Antoine comment)

You can use @supports

@supports (-moz-appearance:none) {_x000D_
    h1 { color:red; } _x000D_
}

<h1>This should be red in FF</h1>

More on @supports here

For me worked just with

# yum install ffmpeg-2.6.4-1.fc22.x86_64.rpm

And automatically asked authorization to dowload the depedencies. Below the example, i am using fedora 22

[root@localhost lukas]# yum install ffmpeg-2.6.4-1.fc22.x86_64.rpm
Yum command has been deprecated, redirecting to '/usr/bin/dnf install  ffmpeg-2.6.4-1.fc22.x86_64.rpm'.
See 'man dnf' and 'man yum2dnf' for more information.
To transfer transaction metadata from yum to DNF, run:
'dnf install python-dnf-plugins-extras-migrate && dnf-2 migrate'

Last metadata expiration check performed 0:28:24 ago on Fri Sep 25 12:43:44 2015.
Dependencies resolved.
====================================================================================================================
 Package               Arch           Version                                  Repository                      Size
====================================================================================================================
Installing:
 SDL                   x86_64         1.2.15-17.fc22                           fedora                         214 k
 ffmpeg                x86_64         2.6.4-1.fc22                             @commandline                   1.5 M
 ffmpeg-libs           x86_64         2.6.4-1.fc22                             rpmfusion-free-updates         5.0 M
 fribidi               x86_64         0.19.6-3.fc22                            fedora                          69 k
 lame-libs             x86_64         3.99.5-5.fc22                            rpmfusion-free                 345 k
 libass                x86_64         0.12.1-1.fc22                            updates                         85 k
 libavdevice           x86_64         2.6.4-1.fc22                             rpmfusion-free-updates          75 k
 libdc1394             x86_64         2.2.2-3.fc22                             fedora                         124 k
 libva                 x86_64         1.5.1-1.fc22                             fedora                          79 k
 openal-soft           x86_64         1.16.0-5.fc22                            fedora                         292 k
 opencv-core           x86_64         2.4.11-5.fc22                            updates                        1.9 M
 openjpeg-libs         x86_64         1.5.1-14.fc22                            fedora                          89 k
 schroedinger          x86_64         1.0.11-7.fc22                            fedora                         315 k
 soxr                  x86_64         0.1.2-1.fc22                             updates                         83 k
 x264-libs             x86_64         0.142-12.20141221git6a301b6.fc22         rpmfusion-free                 587 k
 x265-libs             x86_64         1.6-1.fc22                               rpmfusion-free                 486 k
 xvidcore              x86_64         1.3.2-6.fc22                             rpmfusion-free                 264 k

Transaction Summary
====================================================================================================================
Install  17 Packages

Total size: 11 M
Total download size: 9.9 M
Installed size: 35 M
Is this ok [y/N]: y

On Ubuntu 14.04 I installed it from apt-get and it worked fine:

sudo apt-get install python-beautifulsoup

Then just do:

from BeautifulSoup import BeautifulSoup

I have another approach for Intellij users, and it is working very fine for me:

1. Click on the "Skip Test" button

2. Hold the "CTRL" button
3. Select "clean" and "install"

4. Click on the "Run" button in the maven pannel

Personally, what I've done in the past is give them a common class id and used that to select them. It may not be ideal as they have a class specified that may not exist, but it makes the selection a hell of a lot easier. Just make sure you're unique in your classnames.

i.e. for the example above I'd use your selection by class. Better still would be to change the class name from bold to 'tcol1', so you don't get any accidental inclusions into the jQuery results. If bold does actually refer to a CSS class, you can always specify both in the class property - i.e. 'class="tcol1 bold"'.

In summary, if you can't select by Name, either use a complicated jQuery selector and accept any related performance hit or use Class selectors.

You can always limit the jQuery scope by including the table name i.e. $('#tableID > .bold')

That should restrict jQuery from searching the "world".

Its could still be classed as a complicated selector, but it quickly constrains any searching to within the table with the ID of '#tableID', so keeps the processing to a minimum.

An alternative of this if you're looking for more than 1 element within #table1 would be to look this up separately and then pass it to jQuery as this limits the scope, but saves a bit of processing to look it up each time.

var tbl = $('#tableID');
var boldElements = $('.bold',tbl);
var rows = $('tr',tbl);
if (rows.length) {
   var row1 = rows[0]; 
   var firstRowCells = $('td',row1); 
}

try learning jQuery it's a great place to start with javascript and it really simplifies your code and help separate your js from your html. include the js file from google's CDN (https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js)

then in your script tag (still in the <head>) use:

$(function() {//code inside this function will run when the document is ready
    alert($('#lifecheck').is(':checked'));

    $('#lifecheck').change(function() {//do something when the user clicks the box
        alert(this.checked);
    });
});

Like this:

$dd = document.getElementById("yourselectelementid");
$so = $dd.options[$dd.selectedIndex];

To find a listener on a port, do this:

netstat -tln

You should see a line that looks like this if mysql is indeed listening on that port.

tcp        0      0 127.0.0.1:3306              0.0.0.0:*                   LISTEN      

Port 3306 is MySql's default port.

To connect, you just have to use whatever client you require, such as the basic mysql client.

mysql -h localhost -u user database

Or a url that is interpreted by your library code.

If you want to get a list of all tablespaces used in the current database instance, you can use the DBA_TABLESPACES view as shown in the following SQL script example:

SQL> connect SYSTEM/fyicenter
Connected.

SQL> SELECT TABLESPACE_NAME, STATUS, CONTENTS
  2  FROM USER_TABLESPACES;
TABLESPACE_NAME                STATUS    CONTENTS
------------------------------ --------- ---------
SYSTEM                         ONLINE    PERMANENT
UNDO                           ONLINE    UNDO
SYSAUX                         ONLINE    PERMANENT
TEMP                           ONLINE    TEMPORARY
USERS                          ONLINE    PERMANENT

http://dba.fyicenter.com/faq/oracle/Show-All-Tablespaces-in-Current-Database.html

jquery offers a variety of methods to hide the div in a timed manner that do not require setting up and later clearing or resetting interval timers or other event handlers. Here are a few examples.

Pure hide, one second delay

// hide in one second
$('#mydiv').delay(1000).hide(0); 

Pure hide, no delay

// hide immediately
$('#mydiv').delay(0).hide(0); 

Animated hide

// start hide in one second, take 1/2 second for animated hide effect
$('#mydiv').delay(1000).hide(500); 

fade out

// start fade out in one second, take 300ms to fade
$('#mydiv').delay(1000).fadeOut(300); 

Additionally, the methods can take a queue name or function as a second parameter (depending on method). Documentation for all the calls above and other related calls can be found here: https://api.jquery.com/category/effects/

In my case I simply forget to add in my fragment mRecyclerView.setAdapter(adapter)

1. What is Express.js?

Express.js is a Node.js web application server framework, designed for building single-page, multi-page, and hybrid web applications. It is the de facto standard server framework for node.js.

Frameworks built on Express.

Several popular Node.js frameworks are built on Express:

LoopBack: Highly-extensible, open-source Node.js framework for quickly creating dynamic end-to-end REST APIs.

Sails: MVC framework for Node.js for building practical, production-ready apps.

Kraken: Secure and scalable layer that extends Express by providing structure and convention.

MEAN: Opinionated fullstack JavaScript framework that simplifies and accelerates web application development.

2. What is the purpose of it with Node.js?
3. Why do we actually need Express.js? How it is useful for us to use with Node.js?

Express adds dead simple routing and support for Connect middleware, allowing many extensions and useful features.

For example,

• Want sessions? It's there
• Want POST body / query string parsing? It's there
• Want easy templating through jade, mustache, ejs, etc? It's there
• Want graceful error handling that won't cause the entire server to crash?

NoneType means that instead of an instance of whatever Class or Object you think you're working with, you've actually got None. That usually means that an assignment or function call up above failed or returned an unexpected result.

If you are using forms authentication you could try the code below:

<authentication mode="Forms">
<forms name=".FORM" loginUrl="Login.aspx" defaultUrl="CreateThings.aspx" protection="All" timeout="30" path="/"> 
</forms>
</authentication>

Are you looking for exit?

This is the best bash guide around. http://tldp.org/LDP/abs/html/

In context:

if jarsigner -verbose -keystore $keyst -keystore $pass $jar_file $kalias
then
    echo $jar_file signed sucessfully
else
    echo ERROR: Failed to sign $jar_file. Please recheck the variables 1>&2
    exit 1 # terminate and indicate error
fi

...

This worked in my case:

$('a[data-toggle="dropdown"]').on('click', function() {

    var $el = $(this);

    if ( $el.is(':hover') ) {

        if ( $el.length && $el.attr('href') ) {
            location.href =$el.attr('href');
        }

    }

});

What you have to do is to append the values as parameters in the iframe src (URL).

E.g. <iframe src="some_page.php?somedata=5&more=bacon"></iframe>

And then in some_page.php file you use php $_GET['somedata'] to retrieve it from the iframe URL. NB: Iframes run as a separate browser window in your file.

for xampp it there is in xampp\php\php.ini now mine new option in it looks as :

;Maximum amount of memory a script may consume
;http://php.net/memory-limit
memory_limit=2048M
;memory_limit=512M

Something like (Found at Delete All Procedures from a database using a Stored procedure in SQL Server).

Just so by the way, this seems like a VERY dangerous thing to do, just a thought...

declare @procName varchar(500)
declare cur cursor 

for select [name] from sys.objects where type = 'p'
open cur
fetch next from cur into @procName
while @@fetch_status = 0
begin
    exec('drop procedure [' + @procName + ']')
    fetch next from cur into @procName
end
close cur
deallocate cur

You have a space delimited file, so use the module designed for reading delimited values files, csv.

import csv

with open('path/to/file.txt') as inf:
    reader = csv.reader(inf, delimiter=" ")
    second_col = list(zip(*reader))[1]
    # In Python2, you can omit the `list(...)` cast

The zip(*iterable) pattern is useful for converting rows to columns or vice versa. If you're reading a file row-wise...

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

>>> for line in testdata:
...     print(line)

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

...but need columns, you can pass each row to the zip function

>>> testdata_columns = zip(*testdata)
# this is equivalent to zip([1,2,3], [4,5,6], [7,8,9])

>>> for line in testdata_columns:
...     print(line)

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

The getcode() method (Added in python2.6) returns the HTTP status code that was sent with the response, or None if the URL is no HTTP URL.

>>> a=urllib.urlopen('http://www.google.com/asdfsf')
>>> a.getcode()
404
>>> a=urllib.urlopen('http://www.google.com/')
>>> a.getcode()
200

In your CSS file, such as App.css in a create-react-app, add a fontface import. For example:

@fontface {
  font-family: 'Bungee Inline', cursive;
  src: url('https://fonts.googleapis.com/css?family=Bungee+Inline')
}

Then simply add the font to the DOM element within the same css file.

body {
  font-family: 'Bungee Inline', cursive;
}

My Team built a command line tool for uploading artifacts to nexus 3.x repository, Maybe it's will be helpful for you - Maven Artifacts Uploader

I went into wp-config/ and deleted the object-cache.php and advanced-cache.php and it worked fine for me.

I'm surprised nobody has said this yet, but a solution I have employed is to make a static method inside the class to test itself. This gives you access to everything public and private to test with.

Furthermore, in a scripting language (with OO abilities, like Python, Ruby and PHP), you can make the file test itself when run. Nice quick way of making sure your changes didn't break anything. This obviously makes a scalable solution to testing all your classes: just run them all. (you can also do this in other languages with a void main which always runs its tests as well).

Mehrdad makes some good points, but the main thing I noticed is that you never run the query...

SqlParameter retval = sqlcomm.Parameters.Add("@b", SqlDbType.VarChar);
retval.Direction = ParameterDirection.ReturnValue;
sqlcomm.ExecuteNonQuery(); // MISSING
string retunvalue = (string)sqlcomm.Parameters["@b"].Value;

To do this with multiple images you need to run though an .each() function. This works but I'm not sure how efficient it is.

$('img').hide();
$('img').each( function(){
    $(this).on('load', function () {
        $(this).fadeIn();
    });
});

Spring Boot will handle those repositories automatically as long as they are included in the same package (or a sub-package) of your @SpringBootApplication class. For more control over the registration process, you can use the @EnableMongoRepositories annotation. spring.io guides

@SpringBootApplication
@EnableMongoRepositories(basePackages = {"RepositoryPackage"})
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

Shorter version:

dependencies {
    implementation fileTree('lib')
}

The easiest way is to use Android Debug Database library (7.7k stars on GitHub).

Advantages:

• Fast implementation
• See all the databases and shared preferences
• Directly edit, delete, create the database values
• Run any SQLite query on the given database
• Search in your data
• Download database
• Adding custom database files
• No need to root device

How to use:

1. Add debugImplementation 'com.amitshekhar.android:debug-db:1.0.6' to build.gradle (module);
2. Launch app;
3. Find the debugging link in logs (in LogCat) (i.e. D/DebugDB: Open http://192.168.232.2:8080 in your browser, the link will be different) and open it in the browser;
4. Enjoy the powerful debugging tool!

Important:

• Unfortunately doesn't work with emulators
• If you are using it over USB, run adb forward tcp:8080 tcp:8080
• Your Android phone and laptop should be connected to the same Network (Wifi or LAN)

For more information go to the library page on GitHub.

I'm searched many answers that suggest me to type in cmd:

set path = "%path%;c:program files\java\jdk1.7.0\bin"

but this is WRONG!

the right solution is that you leave "set" and just type

path = %path%;c:program files\java\jdk1.7.0\bin

P/s: of course you have to replace "jdk1.7.0" folder by your current java version folder. This works well on win 7 32bit, but I think it also works on win 8 - try it!

Using Javascript:

document.querySelector('#edit-submitted-first-name').required = false;

• More Info Here

Using jQuery:

$('#edit-submitted-first-name').removeAttr('required');

• More Info Here

// Create Instance of Connection and Command Object
SqlConnection myConnection = new SqlConnection(GentEFONRFFConnection);
myConnection.Open();
SqlCommand myCommand = new SqlCommand("your Procedure Name", myConnection);
myCommand.CommandType = CommandType.StoredProcedure;
myCommand.Parameters.Add("@orgid", SqlDbType.UniqueIdentifier).Value = orgid;
myCommand.Parameters.Add("@statid", SqlDbType.UniqueIdentifier).Value = statid;
myCommand.Parameters.Add("@read", SqlDbType.Bit).Value = read;
myCommand.Parameters.Add("@write", SqlDbType.Bit).Value = write;
// Mark the Command as a SPROC

myCommand.ExecuteNonQuery();

myCommand.Dispose();
myConnection.Close();

Not sure if Access supports it, but in most engines (including SQL Server) this is called a correlated subquery and works fine:

SELECT  TypesAndBread.Type, TypesAndBread.TBName,
        (
        SELECT  Count(Sandwiches.[SandwichID]) As SandwichCount
        FROM    Sandwiches
        WHERE   (Type = 'Sandwich Type' AND Sandwiches.Type = TypesAndBread.TBName)
                OR (Type = 'Bread' AND Sandwiches.Bread = TypesAndBread.TBName)
        ) As SandwichCount
FROM    TypesAndBread

This can be made more efficient by indexing Type and Bread and distributing the subqueries over the UNION:

SELECT  [Sandwiches Types].[Sandwich Type] As TBName, "Sandwich Type" As Type,
        (
        SELECT  COUNT(*) As SandwichCount
        FROM    Sandwiches
        WHERE   Sandwiches.Type = [Sandwiches Types].[Sandwich Type]
        )
FROM    [Sandwiches Types]
UNION ALL
SELECT  [Breads].[Bread] As TBName, "Bread" As Type,
        (
        SELECT  COUNT(*) As SandwichCount
        FROM    Sandwiches
        WHERE   Sandwiches.Bread = [Breads].[Bread]
        )
FROM    [Breads]

Most of these answers are wrong due to the failure to use a locale based comparison for sorting. Look at localizedStandardCompare()

This works well for me:

jQuery(document).ready(function($) {
    var intputElements = document.getElementsByTagName("INPUT");
    for (var i = 0; i < intputElements.length; i++) {
        intputElements[i].oninvalid = function (e) {
            e.target.setCustomValidity("");
            if (!e.target.validity.valid) {
                if (e.target.name == "email") {
                    e.target.setCustomValidity("Please enter a valid email address.");
                } else {
                    e.target.setCustomValidity("Please enter a password.");
                }
            }
        }
    }
});

and the form I'm using it with (truncated):

<form id="welcome-popup-form" action="authentication" method="POST">
    <input type="hidden" name="signup" value="1">
    <input type="email" name="email" id="welcome-email" placeholder="Email" required></div>
    <input type="password" name="passwd" id="welcome-passwd" placeholder="Password" required>
    <input type="submit" id="submitSignup" name="signup" value="SUBMIT" />
</form>

You can use following approach which is ok for small projects

<body onresize="yourHandler(event)">

function yourHandler(e) {
  console.log('Resized:', e.target.innerWidth)
}

<body onresize="yourHandler(event)">
  Content... (resize browser to see)
</body>

you can use Word Mover's Distance algorithm. here is an easy description about WMD.

#load word2vec model, here GoogleNews is used
model = gensim.models.KeyedVectors.load_word2vec_format('../GoogleNews-vectors-negative300.bin', binary=True)
#two sample sentences 
s1 = 'the first sentence'
s2 = 'the second text'

#calculate distance between two sentences using WMD algorithm
distance = model.wmdistance(s1, s2)

print ('distance = %.3f' % distance)

P.s.: if you face an error about import pyemd library, you can install it using following command:

pip install pyemd

let’s try visualizing this concept.

<? super SomeType> is an “undefined(yet)” type, but that undefined type should be a superclass of the ‘SomeType’ class.

The same goes for <? extends SomeType>. It’s a type that should extend the ‘SomeType’ class (it should be a child class of the ‘SomeType’ class).

If we consider the concept of 'class inheritance' in a Venn diagram, an example would be like this:

Mammal class extends Animal class (Animal class is a superclass of Mammal class).

Cat/Dog class extends Mammal class (Mammal class is a superclass of Cat/Dog class).

Then, let’s think about the ‘circles’ in the above diagram as a ‘box’ that has a physical volume.

You CAN’T put a bigger box into a smaller one.

You can ONLY put a smaller box into a bigger one.

When you say <? super SomeType>, you wanna describe a ‘box’ that is the same size or bigger than the ‘SomeType’ box.

If you say <? extends SomeType>, then you wanna describe a ‘box’ that is the same size or smaller than the ‘SomeType’ box.

so what is PECS anyway?

An example of a ‘Producer’ is a List which we only read from.

An example of a ‘Consumer’ is a List which we only write into.

Just keep in mind this:

• We ‘read’ from a ‘producer’, and take that stuff into our own box.

• And we ‘write’ our own box into a ‘consumer’.

So, we need to read(take) something from a ‘producer’ and put that into our ‘box’. This means that any boxes taken from the producer should NOT be bigger than our ‘box’. That’s why “Producer Extends.”

“Extends” means a smaller box(smaller circle in the Venn diagram above). The boxes of a producer should be smaller than our own box, because we are gonna take those boxes from the producer and put them into our own box. We can’t put anything bigger than our box!

Also, we need to write(put) our own ‘box’ into a ‘consumer’. This means that the boxes of the consumer should NOT be smaller than our own box. That’s why “Consumer Super.”

“Super” means a bigger box(bigger circle in the Venn diagram above). If we want to put our own boxes into a consumer, the boxes of the consumer should be bigger than our box!

Now we can easily understand this example:

public class Collections { 
  public static <T> void copy(List<? super T> dest, List<? extends T> src) {
      for (int i = 0; i < src.size(); i++) 
        dest.set(i, src.get(i)); 
  } 
}

In the above example, we want to read(take) something from src and write(put) them into dest. So the src is a “Producer” and its “boxes” should be smaller(more specific) than some type T.

Vice versa, the dest is a “Consumer” and its “boxes” should be bigger(more general) than some type T.

If the “boxes” of the src were bigger than that of the dest, we couldn’t put those big boxes into the smaller boxes the dest has.

If anyone reads this, I hope it helps you better understand “Producer Extends, Consumer Super.”

Happy coding! :)

You should have a look at moment which is a python port of the excellent js lib momentjs.

One advantage of it is the support of ISO 8601 strings formats, as well as a generic "% format" :

import moment
time_string='2012-10-09T19:00:55Z'

m = moment.date(time_string, '%Y-%m-%dT%H:%M:%SZ')
print m.format('YYYY-M-D H:M')
print m.weekday

Result:

2012-10-09 19:10
2

Since not all of my clients use authenticated SMTP accounts, I resorted to using the SMTP account only if app key values are supplied in web.config file.

Here is the VB code:

sSMTPUser = ConfigurationManager.AppSettings("SMTPUser")
sSMTPPassword = ConfigurationManager.AppSettings("SMTPPassword")

If sSMTPUser.Trim.Length > 0 AndAlso sSMTPPassword.Trim.Length > 0 Then
    NetClient.Credentials = New System.Net.NetworkCredential(sSMTPUser, sSMTPPassword)

    sUsingCredentialMesg = "(Using Authenticated Account) " 'used for logging purposes
End If

NetClient.Send(Message)

I am newbie and most of the code is from google search. I got my pdf download working with the code below (trial and error play). Thank you for code tips (xhrFields) above.

$.ajax({
            cache: false,
            type: 'POST',
            url: 'yourURL',
            contentType: false,
            processData: false,
            data: yourdata,
             //xhrFields is what did the trick to read the blob to pdf
            xhrFields: {
                responseType: 'blob'
            },
            success: function (response, status, xhr) {

                var filename = "";                   
                var disposition = xhr.getResponseHeader('Content-Disposition');

                 if (disposition) {
                    var filenameRegex = /filename[^;=\n]*=((['"]).*?\2|[^;\n]*)/;
                    var matches = filenameRegex.exec(disposition);
                    if (matches !== null && matches[1]) filename = matches[1].replace(/['"]/g, '');
                } 
                var linkelem = document.createElement('a');
                try {
                                           var blob = new Blob([response], { type: 'application/octet-stream' });                        

                    if (typeof window.navigator.msSaveBlob !== 'undefined') {
                        //   IE workaround for "HTML7007: One or more blob URLs were revoked by closing the blob for which they were created. These URLs will no longer resolve as the data backing the URL has been freed."
                        window.navigator.msSaveBlob(blob, filename);
                    } else {
                        var URL = window.URL || window.webkitURL;
                        var downloadUrl = URL.createObjectURL(blob);

                        if (filename) { 
                            // use HTML5 a[download] attribute to specify filename
                            var a = document.createElement("a");

                            // safari doesn't support this yet
                            if (typeof a.download === 'undefined') {
                                window.location = downloadUrl;
                            } else {
                                a.href = downloadUrl;
                                a.download = filename;
                                document.body.appendChild(a);
                                a.target = "_blank";
                                a.click();
                            }
                        } else {
                            window.location = downloadUrl;
                        }
                    }   

                } catch (ex) {
                    console.log(ex);
                } 
            }
        });

(EDIT: As pointed out by the OP, the using a java.net.Authenticator is required too. I'm updating my answer accordingly for the sake of correctness.)

(EDIT#2: As pointed out in another answer, in JDK 8 it's required to remove basic auth scheme from jdk.http.auth.tunneling.disabledSchemes property)

For authentication, use java.net.Authenticator to set proxy's configuration and set the system properties http.proxyUser and http.proxyPassword.

final String authUser = "user";
final String authPassword = "password";
Authenticator.setDefault(
  new Authenticator() {
    @Override
    public PasswordAuthentication getPasswordAuthentication() {
      return new PasswordAuthentication(authUser, authPassword.toCharArray());
    }
  }
);

System.setProperty("http.proxyUser", authUser);
System.setProperty("http.proxyPassword", authPassword);

System.setProperty("jdk.http.auth.tunneling.disabledSchemes", "");

break is to break out of a loop like for, while, switch etc which you don't have here, you need to use return to break the execution flow of the current function and return to the caller.

function loop() {
    if (isPlaying) {
        jet1.draw();
        drawAllEnemies();
        requestAnimFrame(loop);
        if (game == 1) {
           return
        }
    }
}

Note: This does not cover the logic behind the if condition or when to return from the method, for that we need to have more context regarding the drawAllEnemies and requestAnimFrame method as well as how game value is updated

You can load your External JS files in Angular and you can load them directly instead of defining in index.html file.

component.ts:

ngOnInit() {
    this.loadScripts();
}


  loadScripts() {
    const dynamicScripts = [
      //scripts to be loaded
      "assets/lib/js/hand-1.3.8.js",
      "assets/lib/js/modernizr.jr.js",
      "assets/lib/js/jquery-2.2.3.js",
      "assets/lib/js/jquery-migrate-1.4.1.js",
      "assets/js/jr.utils.js"
    ];
    for (let i = 0; i < dynamicScripts.length; i++) {
      const node = document.createElement('script');
      node.src = dynamicScripts[i];
      node.type = 'text/javascript';
      node.async = false;
      document.getElementById('scripts').appendChild(node);
    }
  }

component.html:

<div id="scripts">
</div>

You can also load styles similarly.

component.ts:

ngOnInit() {
    this.loadStyles();
}


  loadStyles() {
    const dynamicStyles = [
      //styles to be loaded
      "assets/lib/css/ui.css",
      "assets/lib/css/material-theme.css",
      "assets/lib/css/custom-style.css"
    ];
    for (let i = 0; i < dynamicStyles.length; i++) {
      const node = document.createElement('link');
      node.href = dynamicStyles[i];
      node.rel = 'stylesheet';
      document.getElementById('styles').appendChild(node);
    }
  }

component.html:

<div id="styles">
</div>

try this formula in column E:

=IF( AND( ISNUMBER(D2), D2=G2), H2, "")

your error is the number test, ISNUMBER( ISMATCH(D2,G:G,0) )

you do check if ismatch is-a-number, (i.e. isNumber("true") or isNumber("false"), which is not!.

I hope you understand my explanation.

Try this out. After going through a lot of posts and forums, I found this.

mWebView.setDownloadListener(new DownloadListener() {       

    @Override
    public void onDownloadStart(String url, String userAgent,
                                    String contentDisposition, String mimetype,
                                    long contentLength) {
            DownloadManager.Request request = new DownloadManager.Request(
                    Uri.parse(url));

            request.allowScanningByMediaScanner();
            request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED); //Notify client once download is completed!
            request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "Name of your downloadble file goes here, example: Mathematics II ");
            DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
            dm.enqueue(request);
            Toast.makeText(getApplicationContext(), "Downloading File", //To notify the Client that the file is being downloaded
                    Toast.LENGTH_LONG).show();

        }
    });

Do not forget to give this permission! This is very important! Add this in your Manifest file(The AndroidManifest.xml file)

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />        <!-- for your file, say a pdf to work -->

Hope this helps. Cheers :)

For Skin remove No Skin and add some skin into it

Hmm. By default, <label> is display: inline; and <input> is (roughly, at least) display: inline-block;, so they should both be on the same line. See http://jsfiddle.net/BJU4f/

Perhaps a stylesheet is setting label or input to display: block?

with your own soup object:

soup.p.next_sibling.strip()

1. you grab the <p> directly with soup.p *(this hinges on it being the first <p> in the parse tree)
2. then use next_sibling on the tag object that soup.p returns since the desired text is nested at the same level of the parse tree as the <p>
3. .strip() is just a Python str method to remove leading and trailing whitespace

*otherwise just find the element using your choice of filter(s)

in the interpreter this looks something like:

In [4]: soup.p
Out[4]: <p>something</p>

In [5]: type(soup.p)
Out[5]: bs4.element.Tag

In [6]: soup.p.next_sibling
Out[6]: u'\n      THIS IS MY TEXT\n      '

In [7]: type(soup.p.next_sibling)
Out[7]: bs4.element.NavigableString

In [8]: soup.p.next_sibling.strip()
Out[8]: u'THIS IS MY TEXT'

In [9]: type(soup.p.next_sibling.strip())
Out[9]: unicode

You can use:

SELECT name FROM user WHERE name like 'b%' ORDER BY name

Something along the lines of this?

<asp:TextBox id="txtUsername" runat="server" />

<asp:RegularExpressionValidator
    id="RegularExpressionValidator1"
    runat="server"
    ErrorMessage="Field not valid!"
    ControlToValidate="txtUsername"
    ValidationExpression="[0-9a-zA-Z]{6,}" />

is there some other clause in the language specification that this exploits?

Yes, see 12.8 §34 and §35:

When certain criteria are met, an implementation is allowed to omit the copy/move construction of a class object [...] This elision of copy/move operations, called copy elision, is permitted [...] in a return statement in a function with a class return type, when the expression is the name of a non-volatile automatic object with the same cv-unqualified type as the function return type [...]

When the criteria for elision of a copy operation are met and the object to be copied is designated by an lvalue, overload resolution to select the constructor for the copy is first performed as if the object were designated by an rvalue.

Just wanted to add one more point that returning by value should be the default choice here because a named value in the return statement in the worst case, i.e. without elisions in C++11, C++14 and C++17 is treated as an rvalue. So for example the following function compiles with the -fno-elide-constructors flag

std::unique_ptr<int> get_unique() {
  auto ptr = std::unique_ptr<int>{new int{2}}; // <- 1
  return ptr; // <- 2, moved into the to be returned unique_ptr
}

...

auto int_uptr = get_unique(); // <- 3

With the flag set on compilation there are two moves (1 and 2) happening in this function and then one move later on (3).

I have met the same problem and after long investigation of my XML file I found the problem: there was few unescaped characters like « ».

You can simply check whether the multisets with the elements of x and y are equal:

import collections
collections.Counter(x) == collections.Counter(y)

This requires the elements to be hashable; runtime will be in O(n), where n is the size of the lists.

If the elements are also unique, you can also convert to sets (same asymptotic runtime, may be a little bit faster in practice):

set(x) == set(y)

If the elements are not hashable, but sortable, another alternative (runtime in O(n log n)) is

sorted(x) == sorted(y)

If the elements are neither hashable nor sortable you can use the following helper function. Note that it will be quite slow (O(n²)) and should generally not be used outside of the esoteric case of unhashable and unsortable elements.

def equal_ignore_order(a, b):
    """ Use only when elements are neither hashable nor sortable! """
    unmatched = list(b)
    for element in a:
        try:
            unmatched.remove(element)
        except ValueError:
            return False
    return not unmatched

Unfortunately, C++ does not allow you to directly get a callable object referring to an object and one of its member functions. &Foo::doSomething gives you a "pointer to member function" which refers to the member function but not the associated object.

There are two ways around this, one is to use std::bind to bind the "pointer to member function" to the this pointer. The other is to use a lambda that captures the this pointer and calls the member function.

std::function<void(void)> f = std::bind(&Foo::doSomething, this);
std::function<void(void)> g = [this](){doSomething();};

I would prefer the latter.

With g++ at least binding a member function to this will result in an object three-pointers in size, assigning this to an std::function will result in dynamic memory allocation.

On the other hand, a lambda that captures this is only one pointer in size, assigning it to an std::function will not result in dynamic memory allocation with g++.

While I have not verified this with other compilers, I suspect similar results will be found there.

Simply add this

$id = ''; 
if( isset( $_GET['id'])) {
    $id = $_GET['id']; 
} 

As defined on Wikipedia, this should do it.

euc.dist <- function(x1, x2) sqrt(sum((x1 - x2) ^ 2))

There's also the rdist function in the fields package that may be useful. See here.

EDIT: Changed ** operator to ^. Thanks, Gavin.

Hello I am trying to add new session values in node js like

req.session.portal = false
Passport.authenticate('facebook', (req, res, next) => {
    next()
})(req, res, next)

On passport strategies I am not getting portal value in mozilla request but working fine with chrome and opera

FacebookStrategy: new PassportFacebook.Strategy({
    clientID: Configuration.SocialChannel.Facebook.AppId,
    clientSecret: Configuration.SocialChannel.Facebook.AppSecret,
    callbackURL: Configuration.SocialChannel.Facebook.CallbackURL,
    profileFields: Configuration.SocialChannel.Facebook.Fields,
    scope: Configuration.SocialChannel.Facebook.Scope,
    passReqToCallback: true
}, (req, accessToken, refreshToken, profile, done) => {
    console.log(JSON.stringify(req.session));

Here is code for checked and unchecked with a button:

var set=1;
var unset=0;
jQuery( function() {
    $( '.checkAll' ).live('click', function() {
        $( '.cb-element' ).each(function () {
            if(set==1){ $( '.cb-element' ).attr('checked', true) unset=0; }
            if(set==0){ $( '.cb-element' ).attr('checked', false); unset=1; }
        });
        set=unset;
    });
});

Update: Here is the same code block using the newer Jquery 1.6+ prop method, which replaces attr:

var set=1;
var unset=0;
jQuery( function() {
    $( '.checkAll' ).live('click', function() {
        $( '.cb-element' ).each(function () {
            if(set==1){ $( '.cb-element' ).prop('checked', true) unset=0; }
            if(set==0){ $( '.cb-element' ).prop('checked', false); unset=1; }
        });
        set=unset;
    });
});

For this particular relationship, you could use np.sign:

>>> df["C"] = np.sign(df.A - df.B)
>>> df
   A  B  C
a  2  2  0
b  3  1  1
c  1  3 -1

The general approach to write to any stream (not only MemoryStream) is to use BinaryWriter:

static void Write(Stream s, Byte[] bytes)
{
    using (var writer = new BinaryWriter(s))
    {
        writer.Write(bytes);
    }
}

this line of code on your terminal, solves the problem

$ sudo chown -R $USER:$USER anaconda 3

In Android Studio 3.5, It's soo easy that you can just achieve it in a minute. following is a step wise process.

1: Open Android Studio, Press window button -> Type Android Studio -> click on icon to open android studio splash screen which will look like this.

2: Here you can see an option "Profile or debug APK" click on it and select your apk file and press ok.

3: It will open all your manifest and java classes with in a minute depending upon size of apk.

That's it.

When you're using GROUP BY, you need to also use aggregate functions for the columns not inside your group by clause.

I don't know exactly what you're trying to do, but I guess this would work:

select 
    LEFT(SUBSTRING(batchinfo.datapath, PATINDEX('%[0-9][0-9][0-9]%', batchinfo.datapath), 8000),
    PATINDEX('%[^0-9]%', SUBSTRING(batchinfo.datapath, PATINDEX('%[0-9][0-9][0-9]%', batchinfo.datapath), 8000))-1),
    qvalues.name,
    qvalues.compound,
    MAX(qvalues.rid)
from
    batchinfo join qvalues on batchinfo.rowid=qvalues.rowid
where
    LEN(datapath)>4
group by
    LEFT(SUBSTRING(batchinfo.datapath, PATINDEX('%[0-9][0-9][0-9]%', batchinfo.datapath), 8000),
    PATINDEX('%[^0-9]%', SUBSTRING(batchinfo.datapath, PATINDEX('%[0-9][0-9][0-9]%', batchinfo.datapath), 8000))-1),
    qvalues.name,
    qvalues.compound
having
    rid!=MAX(rid)

Edit: What I'm trying to do here is a group by with all fields but rid. If that's not what you want, what you need to do in order to have a valid SQL statement is adding an aggregate function call for each removed group by field...

Assuming you are using VSTS run vsts-npm-auth -config .npmrc to generate new .npmrc file with the auth token

I had the same issues. As others have mentioned, don't run pip install with sudo. Run

brew doctor 

and fix the warnings and you should be able to proceed with your pip install.

<script> 
    $(document).ready(function(){
        alert('Hi');
    });
</script>

It really depends on what you want to do with the returned value:

• If you need to get the exact name used to declare the enum constant, you should use name() as toString may have been overriden
• If you want to print the enum constant in a user friendly way, you should use toString which may have been overriden (or not!).

When I feel that it might be confusing, I provide a more specific getXXX method, for example:

public enum Fields {
    LAST_NAME("Last Name"), FIRST_NAME("First Name");

    private final String fieldDescription;

    private Fields(String value) {
        fieldDescription = value;
    }

    public String getFieldDescription() {
        return fieldDescription;
    }
}

By default, a grid item cannot be smaller than the size of its content.

Grid items have an initial size of min-width: auto and min-height: auto.

You can override this behavior by setting grid items to min-width: 0, min-height: 0 or overflow with any value other than visible.

From the spec:

6.6. Automatic Minimum Size of Grid Items

To provide a more reasonable default minimum size for grid items, this specification defines that the auto value of min-width / min-height also applies an automatic minimum size in the specified axis to grid items whose overflow is visible. (The effect is analogous to the automatic minimum size imposed on flex items.)

Here's a more detailed explanation covering flex items, but it applies to grid items, as well:

• Why don't flex items shrink past content size?

This post also covers potential problems with nested containers and known rendering differences among major browsers.

To fix your layout, make these adjustments to your code:

.month-grid {
  display: grid;
  grid-template: repeat(6, 1fr) / repeat(7, 1fr);
  background: #fff;
  grid-gap: 2px;
  min-height: 0;  /* NEW */
  min-width: 0;   /* NEW; needed for Firefox */
}

.day-item {
  padding: 10px;
  background: #DFE7E7;
  overflow: hidden;  /* NEW */
  min-width: 0;      /* NEW; needed for Firefox */
}

jsFiddle demo

1fr vs minmax(0, 1fr)

The solution above operates at the grid item level. For a container level solution, see this post:

• Who does minmax(0, 1fr) work for long elements while 1fr doesn't?

I came here with the same Error, though one with a different origin.

It is caused by unsupported float index in 1.12.0 and newer numpy versions even if the code should be considered as valid.

An int type is expected, not a np.float64

Solution: Try to install numpy 1.11.0

sudo pip install -U numpy==1.11.0.

Process may have multiple threads. These threads may share memory and are the units of execution within a process.

Processes run on the CPU, so threads are residing under each process. Processes are individual entities which run independently. If you want to share data or state between each process, you may use a memory-storage tool such as Cache(redis, memcache), Files, or a Database.

for (prop in obj) {
    alert(prop + ' = ' + obj[prop]);
}

// array of $ids that you need to select
$ids = array('1', '2', '3', '4', '5', '6', '7', '8');

// create sql part for IN condition by imploding comma after each id
$in = '(' . implode(',', $ids) .')';

// create sql
$sql = 'SELECT * FROM products WHERE catid IN ' . $in;

// see what you get
var_dump($sql);

Update: (a short version and update missing comma)

$ids = array('1','2','3','4');
$sql = 'SELECT * FROM products WHERE catid IN (' . implode(',', $ids) . ')';

I was curious about which method would be faster:

1. Using Distinct with a custom IEqualityComparer or
2. Using the GroupBy method described by Cuong Le.

I found that depending on the size of the input data and the number of groups, the Distinct method can be a lot more performant. (as the number of groups tends towards the number of elements in the list, distinct runs faster).

Code runs in LinqPad!

    void Main()
    {
        List<C> cs = new List<C>();
        foreach(var i in Enumerable.Range(0,Int16.MaxValue*1000))
        {
            int modValue = Int16.MaxValue; //vary this value to see how the size of groups changes performance characteristics. Try 1, 5, 10, and very large numbers
            int j = i%modValue; 
            cs.Add(new C{I = i, J = j});
        }
        cs.Count ().Dump("Size of input array");

        TestGrouping(cs);
        TestDistinct(cs);
    }

    public void TestGrouping(List<C> cs)
    {
        Stopwatch sw = Stopwatch.StartNew();
        sw.Restart();
        var groupedCount  = cs.GroupBy (o => o.J).Select(s => s.First()).Count();
        groupedCount.Dump("num groups");
        sw.ElapsedMilliseconds.Dump("elapsed time for using grouping");
    }

    public void TestDistinct(List<C> cs)
    {
        Stopwatch sw = Stopwatch.StartNew();
        var distinctCount = cs.Distinct(new CComparerOnJ()).Count ();
        distinctCount.Dump("num distinct");
        sw.ElapsedMilliseconds.Dump("elapsed time for using distinct");
    }

    public class C
    {
        public int I {get; set;}
        public int J {get; set;}
    }

    public class CComparerOnJ : IEqualityComparer<C>
    {
        public bool Equals(C x, C y)
        {
            return x.J.Equals(y.J);
        }

        public int GetHashCode(C obj)
        {
            return obj.J.GetHashCode();
        }
    }

• utf8_bin compares the bits blindly. No case folding, no accent stripping.
• utf8_general_ci compares one byte with one byte. It does case folding and accent stripping, but no 2-character comparisions: ij is not equal ? in this collation.
• utf8_*_ci is a set of language-specific rules, but otherwise like unicode_ci. Some special cases: Ç, C, ch, ll
• utf8_unicode_ci follows an old Unicode standard for comparisons. ij=?, but ae != æ
• utf8_unicode_520_ci follows an newer Unicode standard. ae = æ

See collation chart for details on what is equal to what in various utf8 collations.

utf8, as defined by MySQL is limited to the 1- to 3-byte utf8 codes. This leaves out Emoji and some of Chinese. So you should really switch to utf8mb4 if you want to go much beyond Europe.

The above points apply to utf8mb4, after suitable spelling change. Going forward, utf8mb4 and utf8mb4_unicode_520_ci are preferred.

• utf16 and utf32 are variants on utf8; there is virtually no use for them.
• ucs2 is closer to "Unicode" than "utf8"; there is virtually no use for it.

I faced similar problem a while ago and decided to write Eclipse plug-in that shows complete build path dependency tree of a Java project (although not in graphic mode - result is written into file). The plug-in's sources are here http://github.com/PetrGlad/dependency-tree

You can convert list in string with elements seperated by space and split it based on number/char to be searched..

Will be clean and fast for large list..

>>>L = [2,1,1,2,1,3]
>>>strL = " ".join(str(x) for x in L)
>>>strL
2 1 1 2 1 3
>>>count=len(strL.split(" 1"))-1
>>>count
3

Here is a code to get the child elements (In java):

String childTag = childElement.getTagName();
if(childTag.equals("html")) 
{
    return "/html[1]"+current;
}
WebElement parentElement = childElement.findElement(By.xpath("..")); 
List<WebElement> childrenElements = parentElement.findElements(By.xpath("*"));
int count = 0;
for(int i=0;i<childrenElements.size(); i++) 
{
    WebElement childrenElement = childrenElements.get(i);
    String childrenElementTag = childrenElement.getTagName();
    if(childTag.equals(childrenElementTag)) 
    {
        count++;
    }
 }

Is your first element h1 or similar? That element's margin-top could be causing what seems like a margin on body.

keyPressed - when the key goes down
keyReleased - when the key comes up
keyTyped - when the unicode character represented by this key is sent by the keyboard to system input.

I personally would use keyReleased for this. It will fire only when they lift their finger up.

Note that keyTyped will only work for something that can be printed (I don't know if F5 can or not) and I believe will fire over and over again if the key is held down. This would be useful for something like... moving a character across the screen or something.

We can eliminate the unnecessary file read/write by using text. My complete solution is the following:

proc1 = ['/bin/bash', '-c', 
  "/usr/bin/git ls-remote --heads ssh://repo_url.git"].execute()
proc2 = ['/bin/bash', '-c', 
  "/usr/bin/awk ' { gsub(/refs\\/heads\\//, \"\"); print \$2 }' "].execute()
all = proc1 | proc2

choices = all.text
return choices.split().toList();

//a[text()='programming quesions site']/@href 

which basically identifies an anchor node <a> that has the text you want, and extracts the href attribute.

Thread is a lower-level concept: if you're directly starting a thread, you know it will be a separate thread, rather than executing on the thread pool etc.

Task is more than just an abstraction of "where to run some code" though - it's really just "the promise of a result in the future". So as some different examples:

• Task.Delay doesn't need any actual CPU time; it's just like setting a timer to go off in the future
• A task returned by WebClient.DownloadStringTaskAsync won't take much CPU time locally; it's representing a result which is likely to spend most of its time in network latency or remote work (at the web server)
• A task returned by Task.Run() really is saying "I want you to execute this code separately"; the exact thread on which that code executes depends on a number of factors.

Note that the Task<T> abstraction is pivotal to the async support in C# 5.

In general, I'd recommend that you use the higher level abstraction wherever you can: in modern C# code you should rarely need to explicitly start your own thread.

In the case of a past rebase that you did not properly aborted, you now (Git 2.12, Q1 2017) have git rebase --quit

See commit 9512177 (12 Nov 2016) by Nguy?n Thái Ng?c Duy (pclouds). ^{(Merged by Junio C Hamano -- gitster -- in commit 06cd5a1, 19 Dec 2016)}

rebase: add --quit to cleanup rebase, leave everything else untouched

There are occasions when you decide to abort an in-progress rebase and move on to do something else but you forget to do "git rebase --abort" first. Or the rebase has been in progress for so long you forgot about it. By the time you realize that (e.g. by starting another rebase) it's already too late to retrace your steps. The solution is normally

rm -r .git/<some rebase dir>

and continue with your life.
But there could be two different directories for <some rebase dir> (and it obviously requires some knowledge of how rebase works), and the ".git" part could be much longer if you are not at top-dir, or in a linked worktree. And "rm -r" is very dangerous to do in .git, a mistake in there could destroy object database or other important data.

Provide "git rebase --quit" for this use case, mimicking a precedent that is "git cherry-pick --quit".

Before Git 2.27 (Q2 2020), The stash entry created by "git merge --autostash" to keep the initial dirty state were discarded by mistake upon "git rebase --quit", which has been corrected.

See commit 9b2df3e (28 Apr 2020) by Denton Liu (Denton-L).
^{(Merged by Junio C Hamano -- gitster -- in commit 3afdeef, 29 Apr 2020)}

rebase: save autostash entry into stash reflog on --quit

^{Signed-off-by: Denton Liu}

In a03b55530a ("merge: teach --autostash option", 2020-04-07, Git v2.27.0 -- merge listed in batch #5), the --autostash option was introduced for git merge.

(See "Can “git pull” automatically stash and pop pending changes?")

Notably, when git merge --quit is run with an autostash entry present, it is saved into the stash reflog.

This is contrasted with the current behaviour of git rebase --quit where the autostash entry is simply just dropped out of existence.

Adopt the behaviour of git merge --quit in git rebase --quit and save the autostash entry into the stash reflog instead of just deleting it.

In case you have one of the following cases:

• error: InvalidArgumentError: input_X:Y is both fed and fetched
• case of multiple inputs

You need to do the following changes:

• add filter out for input layers in outputs variable
• minnor change on functors loop

Minimum example:

from keras.engine.input_layer import InputLayer
inp = model.input
outputs = [layer.output for layer in model.layers if not isinstance(layer, InputLayer)]
functors = [K.function(inp + [K.learning_phase()], [x]) for x in outputs]
layer_outputs = [fun([x1, x2, xn, 1]) for fun in functors]

<input type="text" required="true" value="" readonly="true">

This will make a text box in readonly mode, might be helpful in generating passwords and datepickers.

.net Framework allows PictureBox Control to Load Images from url

and Save image in Laod Complete Event

protected void LoadImage() {
 pictureBox1.ImageLocation = "PROXY_URL;}

void pictureBox1_LoadCompleted(object sender, AsyncCompletedEventArgs e) {
   pictureBox1.Image.Save(destination); }

If you want to add item to the beginning of the collection you can use prepend:

$item->prepend($product, 'key');

"Using HTML5/Canvas/JavaScript to take screenshots" answers your problem.

You can use JavaScript/Canvas to do the job but it is still experimental.

If you are selecting only one cell then get selected cell content like this

var cellInfo = dataGrid1.SelectedCells[0];

var content = cellInfo.Column.GetCellContent(cellInfo.Item);

Here content will be your selected cells value

And if you are selecting multiple cells then you can do it like this

var cellInfos = dataGrid1.SelectedCells;

var list1 = new List<string>();

foreach (DataGridCellInfo cellInfo in cellInfos)
{
    if (cellInfo.IsValid)
    {
        //GetCellContent returns FrameworkElement
        var content= cellInfo.Column.GetCellContent(cellInfo.Item); 

        //Need to add the extra lines of code below to get desired output

        //get the datacontext from FrameworkElement and typecast to DataRowView
        var row = (DataRowView)content.DataContext;

        //ItemArray returns an object array with single element
        object[] obj = row.Row.ItemArray;

        //store the obj array in a list or Arraylist for later use
        list1.Add(obj[0].ToString());
    }
}

Swift 5.1. Use with two extension, method return CALayer, so you would reuse it to update frames.

enum Border: Int {
    case top = 0
    case bottom
    case right
    case left
}

extension UIView {
    func addBorder(for side: Border, withColor color: UIColor, borderWidth: CGFloat) -> CALayer {
       let borderLayer = CALayer()
       borderLayer.backgroundColor = color.cgColor

       let xOrigin: CGFloat = (side == .right ? frame.width - borderWidth : 0)
       let yOrigin: CGFloat = (side == .bottom ? frame.height - borderWidth : 0)

       let width: CGFloat = (side == .right || side == .left) ? borderWidth : frame.width
       let height: CGFloat = (side == .top || side == .bottom) ? borderWidth : frame.height

       borderLayer.frame = CGRect(x: xOrigin, y: yOrigin, width: width, height: height)
       layer.addSublayer(borderLayer)
       return borderLayer
    }
}

extension CALayer {
    func updateBorderLayer(for side: Border, withViewFrame viewFrame: CGRect) {
        let xOrigin: CGFloat = (side == .right ? viewFrame.width - frame.width : 0)
        let yOrigin: CGFloat = (side == .bottom ? viewFrame.height - frame.height : 0)

        let width: CGFloat = (side == .right || side == .left) ? frame.width : viewFrame.width
        let height: CGFloat = (side == .top || side == .bottom) ? frame.height : viewFrame.height

        frame = CGRect(x: xOrigin, y: yOrigin, width: width, height: height)
    }
}

Well, you can read the entirety of the POST body like so

echo file_get_contents( 'php://input' );

And, assuming your webserver is Apache, you can read the request headers like so

$requestHeaders = apache_request_headers();

Instead of applying the col-md-* classes to each td in the row you can create a colgroup and apply the classes to the col tag.

    <table class="table table-striped">
        <colgroup>
            <col class="col-md-4">
            <col class="col-md-7">
        </colgroup>
        <tbody>
        <tr>
            <td>Title</td>
            <td>Long Value</td>
        </tr>
        </tbody>
    </table>

Demo here

The best strategy is to wrap the current time in an abstraction and inject that abstraction into the consumer.

Alternatively, you can also define a time abstraction as an Ambient Context:

public abstract class TimeProvider
{
    private static TimeProvider current =
        DefaultTimeProvider.Instance;

    public static TimeProvider Current
    {
       get { return TimeProvider.current; }
       set 
       {
           if (value == null)
           {
               throw new ArgumentNullException("value");
           }
           TimeProvider.current = value; 
       }
   }

   public abstract DateTime UtcNow { get; }

   public static void ResetToDefault()
   {    
       TimeProvider.current = DefaultTimeProvider.Instance;
   }            
}

This will enable you to consume it like this:

var now = TimeProvider.Current.UtcNow;

In a unit test, you can replace TimeProvider.Current with a Test Double/Mock object. Example using Moq:

var timeMock = new Mock<TimeProvider>();
timeMock.SetupGet(tp => tp.UtcNow).Returns(new DateTime(2010, 3, 11));
TimeProvider.Current = timeMock.Object;

However, when unit testing with static state, always remember to tear down your fixture by calling TimeProvider.ResetToDefault().

I think you are talking about padding strings with spaces.

One way to do this is with string format codes.

For example, if you want to pad a string to a certain length with spaces, use something like this:

String padded = String.format("%-20s", str);

In a formatter, % introduces a format sequence. The - means that the string will be left-justified (spaces will be added on the right of the string). The 20 means the resulting string will be 20 characters long. The s is the character string format code, and ends the format sequence.

Looks to be more efficient to add the recognizer directly to the cell as shown here:

Tap&Hold for TableView Cells, Then and Now

(scroll to the example at the bottom)

It would be a good suggestion to use an already built-in function but another way around is to:

1. Create a new column with same data type and NEW NAME.
2. Run an UPDATE/INSERT statement to copy all the data into new column.
3. Drop the old column.

The benefit behind using the sp_rename is that it takes care of all the relations associated with it.

From the documentation:

sp_rename automatically renames the associated index whenever a PRIMARY KEY or UNIQUE constraint is renamed. If a renamed index is tied to a PRIMARY KEY constraint, the PRIMARY KEY constraint is also automatically renamed by sp_rename. sp_rename can be used to rename primary and secondary XML indexes.

You extract it and then use jad against the dir.

The path can either be full or relative (of course if the image is from another domain it must be full).

You don't need to use quotes in the URI; the syntax can either be:

background-image: url(image.jpg);

Or

background-image: url("image.jpg");

However, from W3:

Some characters appearing in an unquoted URI, such as parentheses, white space characters, single quotes (') and double quotes ("), must be escaped with a backslash so that the resulting URI value is a URI token: '\(', '\)'.

So in instances such as these it is either necessary to use quotes or double quotes, or escape the characters.

htdocs is your default document-root directory, so you have to use localhost/index.html to see that html file. In other words, localhost is mapped to xampp/htdocs, so index.html is at localhost itself. You can change the location of document root by modifying httpd.conf and restarting the server.

@tableName Table variables are alive for duration of the script running only i.e. they are only session level objects.

To test this, open two query editor windows under sql server management studio, and create table variables with same name but different structures. You will get an idea. The @tableName object is thus temporary and used for our internal processing of data, and it doesn't contribute to the actual database structure.

There is another type of table object which can be created for temporary use. They are #tableName objects declared like similar create statement for physical tables:

Create table #test (Id int, Name varchar(50))

This table object is created and stored in temp database. Unlike the first one, this object is more useful, can store large data and takes part in transactions etc. These tables are alive till the connection is open. You have to drop the created object by following script before re-creating it.

IF OBJECT_ID('tempdb..#test') IS NOT NULL
  DROP TABLE #test 

Hope this makes sense !

Immediately Invoked Async Arrow Function:

(async () => {
    console.log(await asyncFunction());
})();

Immediately Invoked Async Function Expression:

(async function () {
    console.log(await asyncFunction());
})();

If you specifically want to use SwingX-WS, then have a look at XmlHttpRequest and JSONHttpRequest.

More on those classes in the XMLHttpRequest and Swing blog post.

In my case, It was from Stored Producers. I was removed a field from table and forgotten to remove it from my SP.

Someone should add that one cannot catch "crashes" in C++ code. Those don't throw exceptions, but do anything they like. When you see a program crashing because of say a null-pointer dereference, it's doing undefined behavior. There is no std::null_pointer_exception. Trying to catch exceptions won't help there.

Just for the case someone is reading this thread and thinks he can get the cause of the program crashes. A Debugger like gdb should be used instead.

If you are using Microsoft Drivers 3.1, 3.0, and 2.0. Please check your PHP version already install with IIS.

Use this script to check the php version:

<?php echo phpinfo(); ?>

OR

If you have installed PHP Manager in IIS using web platform Installer you can check the version from it.

Then:
If you are using new PHP version (5.6) please download Drivers from here

For PHP version Lower than 5.6 - please download Drivers from here

• PHP Driver version 3.1 requires PHP 5.4.32, or PHP 5.5.16, or later.
• PHP Driver version 3.0 requires PHP 5.3.0 or later. If possible, use PHP 5.3.6, or later.
• PHP Driver version 2.0 driver works with PHP 5.2.4 or later, but not with PHP 5.4. If possible, use PHP 5.2.13, or later.

Then use the PHP Manager to add that downloaded drivers into php config file.You can do it as shown below (browse the files and press OK). Then Restart the IIS Server

If this method not work please change the php version and try to run your php script.

Tip:Change the php version to lower and try to understand what happened.then you can download relevant drivers.