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• Are strings created with + concatenation stored in the string pool?

  - by Support - multilanguage SO

  For instance String s = "Hello" + " World"; I know there are two strings in the pool "Hello" and "World" but, does: "Hello World" go into the string pool? If so, what about? String s2 = new String("Hola") + new String(" Mundo"); How many strings are there in the pool in each case?

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• Getting a shared pointer to a derived class when base class inherits from enable_shared_from_this

  - by Nikhil

  I have a class B which inherits from A which in turn derives from enabled_shared_from_this. Now, I want to get a shared pointer to B from an instance of B. shared_from_this will return shared_ptr<A>, not shared_ptr<B>. Should I use boost::static_pointer_cast here? Or is there a better way?

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• setAction for NSMatrix Not Working

  - by PF1

  Hi Everyone: I am attempting to call a function when any cell in a NSMatrix instance is selected. I am using the following code in order to accomplish this: [[cellArray objectAtIndex:0] setAction:@selector(testing:)]; [[cellArray objectAtIndex:1] setAction:@selector(testing:)]; However, when I toggle the selection of the two cells, the function isn't run. Is my method of setting the action of each cell incorrect, or is the problem located somewhere else? Thanks for any help.

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• clear properties from stylesheets

  - by jeremydouglas

  I'm wondering if anyone knows of a script to clear all the properties from a css stylesheet, but leave the selectors. For instance: body {background: #000; font-size:10px; width:100%;} becomes: body {} This would be done to the whole stylesheet. Thanks if anyone knows of a script to do this.

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• static NSStrings in Objective-C

  - by MikeyWard

  I frequently see a code snippet like this in class instance methods: static NSString *myString = @"This is a string."; I can't seem to figure out why this works. Is this simply the objc equivalent of a #define that's limited to the method's scope? I (think) I understand the static nature of the variable, but more specifically about NSStrings, why isn't it being alloc'd, init'd? Thanks~

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• Thread pool stack security issue

  - by elmatador

  In a naive implementation of a thread pool, can a piece of code that is being executed read the data left by some previous code on the stack (if it was running on the same thread instance)? Also, are there any other inherent security issues connected to thread pools?

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• Method parameters confusion

  - by elec

  Often time methods take more than 3 parameters which are all of the same type, eg. void mymethod (String param1, String param2, String param3) then it's very easy for the client to mix up the parameters orders, for instance inverting param1 and param2: mymethod (param2, param1, param3); ...which can be the cause of much time spent debugging what should be a trivial matter. Any tips on how to avoid this sort of mistake (apart from unit tests) ?

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• Is there an easier way to get start of current day time than this?

  - by Seymour Cakes

  I basically want to get zero or beginning hour for currrent day. def today = Calendar.instance today.set(Calendar.HOUR_OF_DAY, 0) today.set(Calendar.MINUTE, 0) today.set(Calendar.SECOND, 0) println today // Mon Mar 15 00:00:00 SGT 2010

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• Random Number Generator

  - by skinni

  - (IBAction)randomnum{ int randomNumber1 = 1+ arc4random() %(49); label1.text = [NSString stringWithFormat:@"d", randomNumber]; Local declaration of randomNumber hides instance variable. How can i get round this warning? thanks

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• Mod_rewrite on all website images

  - by Esteve Camps

  I'm designing an image repository. I want to uncouple the filename from the image html link. For instance: image in filesystem is called images/items/12543.jpg HTML is <img src="images/car.jpg" /> Does anyone strongly discourages me to rewrite all image requests using PHP so when retrieving images/car.jpg, Apache really replies content from images/items/12543.jpg? I don't know if I may get performance problems.

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• Instantiating and referencing models in MVC

  - by fig-gnuton

  In MVC, should each model be a globally accessible singleton accessible to any view/controller? Or should the models be singletons that are dependency injected into any component that requires them? Or should a new model instance be created for each component that needs one, in which case events would be used to propagate changes across model instances of the same class?

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• Error when connecting to hello world yesod example on Windows 8

  - by reltone

  I start the executable (after building it with cabal) and it says "Application launched, listening on port 3000." Next I connect to it with my web browser and the console says "threadWaitRead requires -threaded on Windows, or use System.IO.hWaitForInput." The web browser never connects. Not sure what this is actually recommending I do to resolve the problem. {-# LANGUAGE TypeFamilies, QuasiQuotes, MultiParamTypeClasses, TemplateHaskell, OverloadedStrings #-} import Yesod data HelloWorld = HelloWorld mkYesod "HelloWorld" [parseRoutes| / HomeR GET |] instance Yesod HelloWorld getHomeR :: Handler RepHtml getHomeR = defaultLayout [whamlet|Hello World!|] main :: IO () main = warpDebug 3000 HelloWorld

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• How do I set a static bool in another app domain?

  - by Martin

  How do I programatically set the value of a static boolean in another app domain? I'm testing an application where I need to change a bool value. Problem is that the bool value exists as a static instance on a type hosted in another app domain. (I'm doing this for test purposes, it won't be used in production code)

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• java:I am trying to create Shotcut of any abc.exe through java program.

  - by Sanjeev

  I am making an installer in java swing it almost completed only one thing is left to do that is to create desktop shortcut of our software.I do not want to copy software on desktop but I want to create instance of that software like other MS software. How it can be done please help me. I am already copied my software in c:/Program files by using copy directory and I want to create shortcut on desktop .

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• Cannot use ternary operator in LINQ query

  - by Nissan Fan

  I can't figure out why I get a Object reference not set to an instance of an object. error if I use a ternary operator in my LINQ query. var courses = from d in somesource orderby d.SourceName, d.SourceType select new { ID = d.InternalCode, Name = string.Format("{0} - {1}{2}", d.InternalCode, d.SourceName, (d.SourceType.Length > 0 ? ", " + d.SourceType : string.Empty)) }; Any thoughts?

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• Migrated SQL Server database suddenly in "Restoring" state

  - by Pete Montgomery

  I backed up a SQL Server 2005 database and restored it to a new SQL 2008 instance. The restore was quick and successful. Everything was fine for an hour or so. Suddenly, the database is now stuck in "(Restoring...)" state in Management Studio and has a green arrow icon, and my application login is failing! Any advice? :-)

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• Is there a method that returns a System.Web.UI.Page class given an URL?

  - by Aheho

  I'd like to be able to determine what class will be called given an URL. For instance, I have a page /First.aspx that has a hyperlink to /Second.aspx In the code behind for First.aspx.cs, I'd like to be able to determine what class will execute if someone clicks on the hyperlink that points to /Second.aspx.

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• Get Eclipse CDT + boost::shared_ptr<T> to work with syntax completion?

  - by Jeff V

  How to get Eclipse CDT to treat shared_ptr as T * for syntax completion? I'm using windows in this instance. I have 1.39 in the "Program Files" folder. I am about to try 1.37. I am using the Galileo release of Eclipse. Also, I am only editing and browsing the source in Eclipse and building in VC++ Express. (but that is another story)

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• example for Singleton pattern

  - by JavaUser

  Hi, Please give me a real time example for singleton pattern . Different threads accessing a shared file is singleton or not ? Since each thread access the same instance of the file not individual instances of their own .

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• How to get the type of the class for comparison

  - by Halo

  I have this object which is an instance of a superclass. I want to know which subclass that object really is, so that I can decide what to do with it. There is this getClass() method but it's apparently not used for comparison issues. How can I get the sub-type of my object?

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• use uiimagepicker as main view of the application

  - by AP

  Hello, More or less, everything is in the title: how to use a UIImagePicker as the main view of the application like for instance for an Augmented Reality App? Thanks in advance for your help, Regards,

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• Autocompleting MVC View Variables in Eclipse PDT/Zend Studio

  - by voidstate

  When using Zend Studio to write views for a MVC framework, is there any way of having those variables autocomplete, perhaps using PHPdoc? For example, I set a variable in a view called $cart which is an instance of my ShoppingCart class. When I type "$cart-", I'd like the IDE to pop up with all of the objects properties.

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• Replace Entity Framework object

  - by majkinetor

  In MVC app, I am having this big object that is used in classic view/edit/create pattern. When user edits the object I save it as: public bool SetMyObject(MyObject newObject) { MyObject current = GetObjectById(newObject.Id); current.Prop1 = newObject.Prop1 ... current.PropN = newObject.PropN db.SaveChanges(); } MyObject is pretty big so I am wondering is there any better way to do this, not involving per-property assignments. For instance something along the lines db.MyObject.UpdateObject(current, tnew). Ty.

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• Does a syntax for this exist? In any language?

  - by Michael

  It seems pretty common to me to have an argument, in a dynamically typed language that is either an Object or a key to lookup that object. For instance when I'm working with a database I might have a method getMyRelatedStuff(person) All I really need to lookup the related stuff is the id of the person so my method could look like this in python: def getMyRelatedStuff(person_or_id): id = person_or_id.id if isinstance(person,User) else person_or_id #do some lookup Or going the other direction: def someFileStuff(file_or_name): file = file_or_name if hasattr(file,'write') else open(file_or_name)

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• flash video dynamic width and height change in Action Script 3.0

  - by coderex

  hi I have a video player and the video file came from one xml file, The videos are in different dimension so how can i set the video dimension dynamically? _vid = new Video(); _vid.attachNetStream(_vidStream); How can i give the new dimension of the video, the default i get is http://livedocs.adobe.com/flash/9.0/ActionScriptLangRefV3/flash/media/Video.html Video(width:int = 320, height:int = 240) Creates a new Video instance. I need the height and width of the video, How

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