From MSDN Documentation:

&gt; Remarks
&gt; 
&gt; This function returns immediately. If the specified thread has not
&gt; terminated and the function succeeds, the status returned is
&gt; STILL_ACTIVE. If the thread has terminated and the function succeeds,
&gt; the status returned is one of the following values: The exit value
&gt; specified in the ExitThread or TerminateThread function. The return
&gt; value from the thread function. The exit value of the thread&#39;s
&gt; process. Important  The GetExitCodeThread function returns a valid
&gt; error code defined by the application only after the thread
&gt; terminates. Therefore, an application should not use STILL_ACTIVE
&gt; (259) as an error code. If a thread returns STILL_ACTIVE (259) as an
&gt; error code, applications that test for this value could interpret it
&gt; to mean that the thread is still running and continue to test for the
&gt; completion of the thread after the thread has terminated, which could
&gt; put the application into an infinite loop.

So basically it&#39;s still checking current thread from time to time.

It seems to be a bug:

http://connect.microsoft.com/VisualStudio/feedback/details/812144/vs2013-reports-incorrect-thread-exit-code

*There&#39;s a great question here:* [https://stackoverflow.com/questions/11990036/how-to-add-web-api-to-an-existing-asp-net-mvc-4-web-application-project][1]

Unfortunately, it wasn&#39;t enough to solve my problem. I&#39;ve tried twice to be sure I haven&#39;t done anything wrong. I right clicked on &quot;Controllers&quot; and added the item &quot;Web API 2 Controller with actions, using Entity Framework&quot; where I selected my model class and db context. Everything went fine... but still... everytime I&#39;ve tried to access /api/Rest I was getting a 404 error (The name of my Controller is RestController).

  [1]: https://stackoverflow.com/questions/11990036/how-to-add-web-api-to-an-existing-asp-net-mvc-4-web-application-project

404 error after adding Web API to an existing MVC Web Application

In programming contests, the following pattern occurs in a lot of tasks:

&gt; Given numbers A and B that are huge (maybe 20 decimal digits or more), determine the number of integers X with A ≤ X ≤ B that have a certain property P

[SPOJ has lots of tasks like these](https://www.google.com/?q=%22spoj%22+%22numbers+between%22+A+and+B#q=%22spoj%22+%22numbers+between%22+A+and+B) for practice.

Where examples of interesting properties include:

* &quot;the digit sum of X is 60&quot;
* &quot;X consists only of the digits 4 and 7&quot;
* &quot;X is palindromic&quot;, which means that the decimal representation of X equals its reverse (for example, X = 1234321)

I know that if we define *f(Y)* to be the number of such integers X ≤ Y, then the answer to our question is *f(B) - f(A - 1)*. The reduced problem is how to compute the function *f* efficiently. In some cases we can make use of certain mathematical properties to come up with a formula, but often the properties are more complicated and we don&#39;t have enough time for that in a contest.

Is there a more general approach that works in a lot of cases? And can it also be used to enumerate the numbers with the given property or compute some aggregation on them?

A variation of this is to find the k-th number with a given property, which of course can be solved by using binary search together with a counting function.

How to count integers between large A and B with a certain property?

I&#39;m getting a slew of these messages in my Winforms application even though I never explicitly made any threads. Why is this happening? I&#39;ve looked around for an explanation but it&#39;s hard to word an inquiry like this.

I&#39;m using Visual Studios 2013 and this is the debug output that I&#39;m concerned about:

    The thread 0x23a4 has exited with code 259 (0x103).
    The thread 0x2884 has exited with code 259 (0x103).
    The thread 0x27ec has exited with code 259 (0x103).
    The thread 0x1978 has exited with code 259 (0x103).
    The thread 0x1534 has exited with code 259 (0x103).
    The thread 0x1ad8 has exited with code 259 (0x103).
    The thread 0x2938 has exited with code 259 (0x103).
    The thread 0x22c8 has exited with code 259 (0x103).

Why am I seeing multiple &quot;The thread 0x22c8 has exited with code 259 (0x103).&quot; messages

I'm getting a slew of these messages in my Winforms application even though I never explicitly made any threads. Why is this happening? I've looked around for an explanation but it's hard to word an inquiry like this.
I'm using Visual Studios 2013 and this is the debug output that I'm concerned about:
<pre><code class="hljs language-css">The thread 0x23a4 has exited with code 259 (0x103).
The thread 0x2884 has exited with code 259 (0x103).
The thread 0x27ec has exited with code 259 (0x103).
The thread 0x1978 has exited with code 259 (0x103).
The thread 0x1534 has exited with code 259 (0x103).
The thread 0x1ad8 has exited with code 259 (0x103).
The thread 0x2938 has exited with code 259 (0x103).
The thread 0x22c8 has exited with code 259 (0x103).
</code></pre>

I have a small MVC app that I use for practice reasons, but now I am encountering an error every time I try to debug:


    Could not load file or assembly &#39;System.Net.Http.Formatting&#39; or one of its dependencies. 
    The system cannot find the path specified.

I&#39;ve googled but cannot find a solution. I&#39;m using .NET 4.5.

It can&#39;t be the DLL file because I&#39;m using .Net 4.5.

Could not load file or assembly &#39;System.Net.Http.Formatting&#39; or one of its dependencies. The system cannot find the path specified

I came across [this MSDN page][1] that states:

&gt; Do not throw [Exception](https://docs.microsoft.com/en-us/dotnet/api/system.exception), [SystemException](https://docs.microsoft.com/en-us/dotnet/api/system.systemexception), [NullReferenceException](https://docs.microsoft.com/en-us/dotnet/api/system.nullreferenceexception), or [IndexOutOfRangeException](https://docs.microsoft.com/en-us/dotnet/api/system.indexoutofrangeexception) intentionally from your own source code.

Unfortunately, it does not bother to explain why. I can guess the reasons but I hope that someone more authoritative on the subject might offer their insight.

The first two make some obvious sense, but the latter two seem like ones you would want to employ (and in fact, I have).

Further, are these the only exceptions one should avoid? If there are others, what are they and why should they, too, be avoided?

  [1]: https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/exceptions/creating-and-throwing-exceptions

Why are we not to throw these exceptions?

I&#39;m aware that StackOverflowExceptions in .NET can&#39;t be caught, take down their process, and have no stack trace. This is officially documented [on MSDN][1]. However, I&#39;m wondering what the technical (or other) reasons are behind the behavior. All MSDN says is:

&gt; In prior versions of the .NET Framework, your application could catch
&gt; a StackOverflowException object (for example, to recover from
&gt; unbounded recursion). However, that practice is currently discouraged
&gt; because significant additional code is required to reliably catch a
&gt; stack overflow exception and continue program execution.

What is this &quot;significant additional code&quot;? Are there other documented reasons for this behavior? Even if we can&#39;t catch SOE, why can&#39;t we at least get a stack trace? Several co-workers and I just sunk several hours into debugging a production StackOverflowException that would have taken minutes with a stack trace, so I&#39;m wondering if there is a good reason for my suffering.

  [1]: http://msdn.microsoft.com/en-us/library/system.stackoverflowexception%28v=vs.110%29.aspx

Why does .NET behave so poorly when StackOverflowException is thrown?

With EF6 you have a new transaction which can be used like:

    using (var context = new PostEntityContainer())
            {
                using (var dbcxtransaction = context.Database.BeginTransaction())
                {
                    try
                    {
                        PostInformation NewPost = new PostInformation()
                        {
                            PostId = 101,
                            Content = &quot;This is my first Post related to Entity Model&quot;,
                            Title = &quot;Transaction in EF 6 beta&quot;
                        };
                        context.Post_Details.Add(NewPost);
                        context.SaveChanges();
                        PostAdditionalInformation PostInformation = new PostAdditionalInformation()
                        {
                            PostId = (101),
                            PostName = &quot;Working With Transaction in Entity Model 6 Beta Version&quot;
                        };

                        context.PostAddtional_Details.Add(PostInformation);
                        context.SaveChanges();

                        dbcxtransaction.Commit();
                    }
                    catch
                    {
                        dbcxtransaction.Rollback();
                    }
                }
            }

Is rollback actually needed when things go sideways? I&#39;m curious because the Commit description says: &quot;Commits the underlying store transaction.&quot;

Whereas the Rollback description says: &quot;Rolls back the underlying store transaction.&quot;

This makes me curious, because it looks to me that if Commit isn&#39;t called, the previously executed commands will not be stored (which seems logical to me). But if that is the case, what would the reason be to call the Rollback function? In EF5 I used TransactionScope which didn&#39;t have a Rollback function (only a Complete) which seemed logical to me. Due to MS DTC reasons I cannot use the TransactionScope anymore, but I also cannot use a try catch like the example above (i.e., I only need the Commit).



Entity Framework 6 transaction rollback

I am working on a project in which I have multiple interface and two Implementations classes which needs to implement these two interfaces.

Suppose my first Interface is -

	public Interface interfaceA {
		public void abc() throws Exception;
	}
                
And its implementation is - 

	public class TestA implements interfaceA {
					
	// abc method
	}
                
I am calling it like this - 

	TestA testA = new TestA();
	testA.abc();
                
Now my second interface is - 

	public Interface interfaceB {
		public void xyz() throws Exception;
	}
                
And its implementation is -

	public class TestB implements interfaceB {

	// xyz method   
	}
                
I am calling it like this - 

	TestB testB = new TestB();
	testB.xyz();
                                
**Problem Statement:-**

Now my question is - Is there any way, I can execute these two implementation classes in parallel? I don&#39;t want to run it in sequential.

Meaning, I want to run `TestA` and `TestB` implementation in parallel? Is this possible to do?

I was thinking to use Callable here but not sure how to use Callable with void return type here - 

Let&#39;s use TestB class as an example:

	public interface interfaceB {
		public void xyz() throws Exception;
	}

	public class TestB implements interfaceB, Callable&lt;?&gt;{

		@Override
		public void xyz() throws Exception
		{
			//do something
						
		}

		@Override
		public void call() throws Exception
		{
			xyz();
		}
	}
                
Above code gives compilation error..

**UPDATE:-**

It looks like lot of people are suggesting to use Runnable instead of callable. But not sure how do I use Runnable here so that I can execute `TestA and TestB` in parallel.

How to use Callable with void return type?

From the [docs][1]:
&gt; threading.RLock() --
&gt; A factory function that returns a new reentrant lock object. A reentrant lock must be released by the thread that acquired it. Once a thread has acquired a reentrant lock, the same thread may acquire it again without blocking; the thread must release it once for each time it has acquired it.


I am not sure why do we need this?
what&#39;s the difference between `Rlock` and `Lock`?


  [1]: https://docs.python.org/2/library/threading.html

What is the difference between Lock and RLock

What is the difference between `gcc -pthread` and `gcc -lpthread` which is used while compiling multithreaded programs?

Difference between -pthread and -lpthread while compiling

&gt; Instances of java.util.Random are threadsafe. However, the concurrent
&gt; use of the same java.util.Random instance across threads may encounter
&gt; contention and consequent poor performance. Consider instead using
&gt; ThreadLocalRandom in multithreaded designs.

What kind of contention and thus poor performance ? Can anybody please, explain me here ? I don&#39;t know what algorithm goes inside Random and ThreadLocalRandom that makes them different.

Random over ThreadLocalRandom

When trying to answer another [Stackoverflow question][1], I realized that this simple C++11 snippet is implicitly blocking the calling thread:

    std::async(std::launch::async, run_async_task)

To me this would have seemed the canonical C++11 way to launch a task asynchronously without caring about the result. Instead one has to apparently explicitly create and detach a thread (see [answer][2] to mentioned question) in order to achieve this.

So here&#39;s my question: Is there any reason in regards to safety/correctness that the destructor of a `std::future` has to be blocking? Wouldn&#39;t it be enough if it blocks on `get` only and otherwise, if I&#39;m not interested in the return value or exception, it&#39;s simply fire and forget?


  [1]: https://stackoverflow.com/questions/23454793/whats-the-c-11-way-to-fire-off-an-asynchronous-task-and-forget-about-it
  [2]: https://stackoverflow.com/a/23454840/369310

Why is the destructor of a future returned from `std::async` blocking?

My company is upgrading our Visual Studio 2012 to 2013 Premium. In the midst of this, we are also looking to start automating our tests using [Visual Studio Team Services][1]

I have read a couple of MSTest vs nUnit posts and articles in the past but most of it compares the older version of MSTest. Also, nUnit had a lot of favourable reviews as compared to MSTest.

My question is, considering Microsoft&#39;s commitment towards the ALM, Agile practices and all the new stuff they&#39;ve added into VS2013 Premium and Visual Studio Team Services to facilitate and encourage automated testing, how does MSTest compare to nUnit? 

What other considerations should I take before making a decision on a testing framework to use?


  [1]: https://www.visualstudio.com/products/tfs-overview-vs

Visual Studio 2013 MSTest vs NUnit

I have an ASP.NET MVC5 application that worked yesterday and now I am getting this error when I try to build:

&gt;This project references NuGet package(s) that are missing on this computer.

I have the two options checked that allow nuget to automatically download and install missing packages checked / turned ON. I have also tried deleting all of the files in the packages folder and then have nuget re-download them. Also when I open nuget and look for updates it says there are none that need to be installed. I can&#39;t figure what else to do to move beyond this amazingly annoying issue.

I have also enabled nuget restore by right clicking the project and selecting that option. It then added a nuget folder and three items in that folder and does nothing to resolve the problem. I&#39;ve tried re-building and still get the same error.

This project references NuGet package(s) that are missing on this computer

Visual Studio IntelliSense for VC++ includes the &quot;complete&quot; [EDG C++ parser][1] (also used by Intel and others). Since the C# Code DOM is accessible to addons (correct me if I&#39;m wrong), is the C++ Code DOM also accessible? Can this be used to analyse an open VC++ project within the VS environment?


  [1]: http://www.edg.com/?location=c_frontend

Is the VC++ code DOM accessible from VS addons?

I want to disable visual studios browser link. I found this question:
https://stackoverflow.com/questions/17390158/how-can-i-disable-vwd-js-artery-in-vs-net-2013
and many other resources saying I should untick &quot;Enable Browser Link&quot; in the toolbar, but that toolbar doesn&#39;t show up in my visual studio.  I&#39;ve enabled all the debug toolbars but still no browser link button.



Disable Browser Link - which toolbar

How do I change the font size used in Solution Explorer? The default font size is too small for me.

How do I change the font size of Solution Explorer (in Visual Studio)

What would be the best way to check the *exit status* in an `if` statement in order to echo a specific output?

I&#39;m thinking of it being:

```shell
if [ $? -eq 1 ] 
then
    echo &quot;blah blah blah&quot;
fi
```

The issue I am also having is that the `exit` statement is before the `if` statement simply because it has to have that exit code. Also, I know I&#39;m doing something wrong since the exit would obviously exit the program.

How to check the exit status using an &#39;if&#39; statement

I can run a bash command in node.js like so:

    var sys = require(&#39;sys&#39;)
    var exec = require(&#39;child_process&#39;).exec;
    
    function puts(error, stdout, stderr) { sys.puts(stdout) }
    exec(&quot;ls -la&quot;, function(err, stdout, stderr) {
      console.log(stdout);
    });

How do I get the exit code of that command (`ls -la` in this example)? I&#39;ve tried running

    exec(&quot;ls -la&quot;, function(err, stdout, stderr) {
      exec(&quot;echo $?&quot;, function(err, stdout, stderr) {
        console.log(stdout);
      });
    });

This somehow always returns 0 regardless of the the exit code of the previous command though. What am I missing?

    

Content Type	Original Author	Original Content on Stackoverflow
Question	Mark S	View Question on Stackoverflow
Solution 1 - C#	tweellt	View Answer on Stackoverflow

Why am I seeing multiple "The thread 0x22c8 has exited with code 259 (0x103)." messages

C# Problem Overview

C# Solutions

Solution 1 - C#

How to count integers between large A and B with a certain property?

404 error after adding Web API to an existing MVC Web Application

Attributions