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• Why doesn't NSDateFormatter return a NSString?

  - by TheLearner

  Why does this message not return a string: NSDate *today = [NSDate date]; NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; NSString *formattedDate = (@"Date for today %@:", [dateFormatter stringFromDate:today]);

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• Java > SimpleDateFormat > Month + 1 Why ?

  - by Natim

  Hello, I am using SimpleDateFormat to display a Calendar like this : public String getDate() { String DATE_FORMAT = "EEEE, dd/MM/yyyy HH:mm:ss"; SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT); System.err.println(date.getTime().getMonth()); return sdf.format(date.getTime()); } The shell returns 6 and the display : mardi, 06/07/2010 12:44:52 It can't be possible ? Why ? Thanks

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• Why did git set us on (no branch)?

  - by e-satis

  This morning we pull from our repo, and git put us on (no branch). I don't understand this, why did this happen? And how get out of it without losing our changes?

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• Why is mscorsvw.exe maxing out my CPU?

  - by Heckflosse_230

  I installed my .NET windows service and right after installing I noticed mscorsvw.exe maxing out my CPU; this happens when I do a new install of my service. Why is mscorsvw "interfering" with my windows service?

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• Why does this compile?

  - by akf

  I was taken aback earlier today when debugging some code to find that something like the following does not throw a compile-time exception: public Test () { HashMap map = (HashMap) getList(); } private List getList(){ return new ArrayList(); } As you can imagine, a ClassCastException is thrown at runtime, but can someone explain why the casting of a List to a HashMap is considered legal at compile time?

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• Why does this throw NullPointerException?

  - by Parhs

  e.getCategory() != null ? e.getCategory().getName() : ""; This throws a NullPointerException and I do not understand why. Can anyone explain?

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• why i am getting Undefinedlabel error in java?

  - by rohit

  hi, why i am getting undefined label error in following code?? i am ignoring code as it is of no use... loopLabel: for(i=0;;i++) { { some code; } { come code; } } if(condition) { if(condition) { some code } else { some code; continue loopLabel; } }

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• Why is used umask ?

  - by fabrizioM

  I am reading some source code and I found at the very begin of the main routine this statement: umask(077); What could be the reason for that? The man page (man 2 umask) states: umask -- set file creation mode mask This clearing allows each user to restrict the default access to his files But is not clear to me why would do that? as a shortcut ?

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• Why can't i capture this breakpoint (debugger) when using firefox's firebug

  - by ooo

  I have this code below and as a test i have that alert below. When i open firebug and i put a break point on the "debugger" and it doesn't fire but the alert does get called as a i get a alert popup. Any idea why i can't capture this breakpoint ? <script type="text/javascript"> $(function() { $("#tabs").tabs({ selected: 0, load: function(event, ui) { debugger; alert(ui.panel.id); } });

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• Why does a programming language need keywords?

  - by eSKay

  For example (in C): int break = 1; int for = 2; Why will the compiler have any problems at all in deducing that break and for are variables here?

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• Why is my BeginInvoke method not async?

  - by Petr

  Hi, In order to avoid freezing of GUI, I wanted to run method connecting to DB asynchronously. Therefore I have written this: DelegatLoginu dl = ConnectDB; IAsyncResult ar=dl.BeginInvoke(null, null); bool result = (bool)dl.EndInvoke(ar); But it is still freezing and I do not understand why - I though BeginInvoke assures that method it references is run in another thread. Thank you!

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• Why is abs(0x80000000) == 0x80000000?

  - by sigjuice

  I just started reading Hacker's Delight and it defines abs(-231) as -231. Why is that? I tried printf("%x", abs(0x80000000)) on a few different systems and I get back 0x80000000 on all of them.

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• why grouping Design pattern in three parts?

  - by Phsika

  Design pattern can separeted 3 important part: "http://www.dofactory.com/Patterns/Patterns.aspx". why three part? Creational Patterns Structural Patterns Behavioral Patterns How can i separete it into three part? According to what?

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• Why are pushpins automatically added to my VEShapeType.Polyline object

  - by cocoliscious

  Hi, I am trying to create a number of polylines in Javascript. For some reason, bing maps automatically/randomly adds pushpins in the middle of some of these polylines. Does anyone know why this is the default behaviour and how I can override it? Thanks!

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• Why isn't my variable expanded in this string?

  - by Steven

  $q = $_GET['q']; // Load and parse the XML document $rss = simplexml_load_file('http://search.twitter.com/search.atom?lang=en&q=$q&rpp=100&page=1'); This returns results containing "$q" instead of results containing the value of $q. Why won't it work?

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• Why should Java ThreadLocal variables be static

  - by kellyfj

  I was reading that JavaDoc for Threadlocal here http://java.sun.com/j2se/1.5.0/docs/api/java/lang/ThreadLocal.html and it says "ThreadLocal instances are typically private static fields in classes that wish to associate state with a thread (e.g., a user ID or Transaction ID). " But my question is why did they choose to make it static (typically) - it makes it a bit confusing to have "per thread" state but its static?

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• Why no iphone app linking contacts to calendar?

  - by Den

  I am not a programmer. I would pay for an application that allowed me to create a link between a calendar appointment and one or more of my contacts. This seems like an obvious applications with a huge market Why is it not possible to do this?

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• Why are Nested Comments forbidden?

  - by primalpop

  Why are nested comments forbidden in C++, Java inspite of the fact that nested comments are useful, neat, and elegant and can be used to comment out statements that have comments?

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• Why are filename underscores better than hyphens

  - by Jasie

  From Building Skills in Python: "A file name like exercise_1.py is better than the name execise-1.py. We can run both programs equally well from the command line, but the name with the hyphen limits our ability to write larger and more sophisticated programs." Why?

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• Why do we need a Grid Control?

  - by Nam Gi VU

  I don't know why we need a grid when building a Windows form! What can't we do without a grid control in a Windows form then? Please discuss.

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• Bad Request (400): Why?

  - by ProfK

  Why do I get a 400 - bad request error using the following URL? It is encoded using Server.UrlEncode. The actual path query parameter is C:\Development\Chase\Exports\ChaseExport-090312073930.zip http://localhost:50199/Common/Forms/Export_Stream.aspx%3fpath%3dC%3a%5CDevelopment%5CChase%5CExports%5CChaseExport-090312073930.zip

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• in jQuery, why are we using this ({ })

  - by uzay95

  I wonder that, why are we using ({ }) ? Is it delegate ? What does it mean to use this syntax ? What are we wrapping with it ? For ex: $.ajaxSetup ({ // <-- THIS error: fError, compelete: fComp, success: fSucc }); // <-- AND THIS

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• Why is `goog.Disposable.call(this);` necessary?

  - by David Faux

  In this snippet of Google Closure javascript code involving a constructor, why is goog.Disposable.call(this); necessary? Doesn't Foo already inherit from Disposable with goog.inherits(foo, goog.Disposable);? goog.provide('foo'); /** * @constructor */ foo = function(){ goog.Disposable.call(this); } goog.inherits(foo, goog.Disposable); foo.prototype.doSomething = function(){ ... } foo.prototype.disposeInternal = function(){ ... }

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• Why dll can't be used in c++?

  - by Mask

  It's pointed out by this answer: http://stackoverflow.com/questions/2532280/failed-to-link-mysql5-1-39-bin-libmysql-dll-in-a-c-project/2532382#2532382 But I don't understand why,.dll is essentially the same as .lib except for there is only one copy of it used by different processes. Does it have anything to do with the IDE?I'm using visual c++ 2008 express

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• Why do people run Java GUI's on the Event Queue

  - by asmo

  In Java, to create and show a new JFrame, I simply do this: public static void main(String[] args) { new JFrame().setVisible(true); } However, I have seen many people doing it like this: public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { new JFrame().setVisible(true); } }); } Why? Are there any advantages?

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