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• question regarding pointer in c language

  - by din

  char *sample = "String Value"; &sample is a pointer to the pointer of "String Value" is the above statement right? If the above statement right, what is the equivalent of &sample if my declaration is char sample[] = "String Value"

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• IBOutlet on properties and exposition of the class

  - by Espuz

  Apple, for memory management issues, recommend defining outlets on properties, not in the attribute declaration. But, as far as I know, declaring properties exposes the class to external classes, so this could be dangerous. On UIViewController we have the main view definition and the logic, so MVC is slightly cheated in this cases. What is the beteer approach, Apples's recommendation for memory-management or armored classes?

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• Need help with NSString that returns (null)

  - by Guy Dor

  Hi, I have a problem with my string that returns (null) Here's the MainViewController: NSString *leftWebViewUrl; MainViewController *mainViewController; @property (nonatomic, retain) NSString *leftWebViewUrl; @property (nonatomic, retain) MainViewController *mainViewController; leftWebViewUrl = [NSString stringWithString:leftWebView.request.URL.absoluteString]; leftSharingViewController.leftWebViewUrl = leftWebViewUrl; Here's the leftSharingViewController (just the NSString declaration) NSString *leftWebViewUrl; @property (nonatomic, retain) NSString *leftWebViewUrl; From some reason I get (null) Thanks

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• NHibernate - ISession

  - by Guilherme Cardoso

  Hi About the declaration of ISession. Should we close the Session everytime we use it, or should we keep it open? I'm asking this because in manual of NHibernate (nhforge.org) they recommend us to declare it once in Application_Start for example, but i don't know if we should close it everytime we use. Thanks

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• Odd behaviour with scala method syntax

  - by Ceilingfish

  Hi chaps, I hit a bit of a quirk of scala's syntax I don't really understand object Board { def getObjectAt(x:Int, y:Int):Placeable = return locations(x)(y) } works fine. But object Board { def getObjectAt(x:Int, y:Int):Placeable { return locations(x)(y) } } returns the error Board.scala:8: error: illegal start of declaration return locations(x)(y) I found some stuff that says the second form convinces the scala compiler you're trying to specify an expansion to the return type Placeable. Is there a way I can fix this, or should I just avoid specifying a return type here?

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• Problem with C function of type char pointer, can someone explain?

  - by JJ

  Find the errors from following C function : char* f(int i) { int i; char buffer[20]; switch ( i ) { 1: strcpy( buffer, "string1"); 2: strcpy( buffer, "string2"); 3: strcpy( buffer, "string3"); default: strcpy(buffer, "defaultstring"); } return buffer; } this is c funtion not C++, I think it has to do with type conversion my compiler give warning that declaration of int i shadows a parameter.

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• struct size is different from typedef version?

  - by samoz

  I have the following struct declaration and typedef in my code: struct blockHeaderStruct { bool allocated; unsigned int length; }; typedef struct blockHeaderStruct blockHeader; When I do sizeof(blockheader), I get the value of 4 bytes back, but when I do sizeof(blockHeaderStruct), I get 8 bytes. Why is this happening? Why am I not getting 5 back instead?

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• #Define's scope throughout library?

  - by Mohit Deshpande

  Say I have a constant: #define PI 3.14 Say I have a static library with multiple header and source files. If I declare this in the header file, will its scope apply to all of the source files? Or do the source files need to include the header with the declaration of PI?

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• Difference between "+" and "-" before function name in iPhone

  - by user280556

  Hello Everyone, What is the difference between "+" and "-" before the function name interface declaration in an iPhone program. Example: - (void)continueSpeaking; + (NSArray *)availableVoices; What's the difference?

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• Only static and const varibles can be assign to a class ??

  - by numerical25

  I am learning c++. Just curious, can only Static and constant varibles be assigned a value from within the class declaration ?? is this mainly why when you assign values to normal members, they have a special way doing it void myClass::Init():member1(0), member2(1) { }

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• How do you make a private member in the base class become a public member in the base class?

  - by jasonline

  Consider the following code: class Base { void f() { } }; class Derived: public Base { public: }; What can you change in the derived class, such that you can perform the following: Derived d; d.f(); If the member is declared as public in the base class, adding a using declaration for Base::f in the derived class public section would've fix the problem. But if it is declared as private in the base class, this doesn't seem to work.

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• What is the difference between <E extends Number> and <Number>?

  - by kunjaan

  What is the difference between this method declaration: public static <E extends Number> List<E> process(List<E> nums){ and public static List<Number> process(List<Number> nums){ Where would you use the former?

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• How to create an array, array list, array stack and array queue in Java?

  - by theband

  I was reading a Java article, but found no differences in the declaration and was confused over. Can anyone list me out this?

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• why do java programmers like to name a variable 'clazz' ?

  - by Tony

  I've seen lots of codes have declaration like Class clazz , where does this originate from ? Is this some kind of convention ? I think 'clazz' is not even a English word , has no meaning at all .

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• django display m2m elements in a template

  - by dana

  if a have a declaration like theclass = Classroom.objects.get(classname = classname) members = theclass.members.all() and i want to display all the members(of a class) in a template, how should i do it?? if i write: {{theclass.members.all}} the output is an empty list(though the class has some members) How should the elements of a m2m table be displayed in a template? thanks!

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• shared_ptr as class member

  - by idimba

  It's common to declared contained objects as a pointers to that class, while "forward declarating" them in header file. This in order to reduce physical dependencies in code. For example class B; // forward declaration class A { private: B* pB; }; Would it be good idea to declare such a member as shared_ptr, instead of naked pointer? I would prefer scoped_ptr, but AFAIKit it won't be in standard.

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• Visual C# Express 2010: how to set language to C# 2.0

  - by luqui

  I am using Visual C# Express 2010 to develop an application for the Unity3D game engine, which only supports C# 2.0. That is, I am only using it to edit code, but the compilation is done by Unity. I'm wondering if there is a way to configure Visual C# to edit C# 2.0, so that, for example, it yells if I (out of habit) try to use a var declaration or foo => bar function. Thanks!

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• Serialize ASP.NET Web Service HTTP POST request results

  - by nigative

  I am trying to serialize my webmethod output (rename XML element with results), So far [return: System.Xml.Serialization.SoapElementAttribute("results")] before method declaration works fine with soap requests, but I am looking for something that would work the same way with HTTP POST/GET requests as well (right now I get return class name as element name)

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• Getting An Array Result From A C# Method

  - by Soo

  I am trying to write some code to return an array in C#, but don't know the proper syntax. I think my method is set up correctly, but to set an array to the result of the method is what I'm having difficulty with. Method Declaration: double[,] function(double variable) { ... code ... return array }

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• LaTeX - Changing the font sizxe for a document, but in the preamble, not the document class?

  - by Rory

  I have a LaTeX document. I want to change the font size of all the text, to make it smaller. Normally I would just change the documentclass part. However I am generating LaTeX files from another programme, and it is setting the documentclass, I can't change that. However I can put things in the preamble. Is there anyway to change the font size in the preamble, without touching the documentclass declaration.

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• Working with wchar in C

  - by Richard Mar.

  I have this code: #include <stdio.h> #include <wchar.h> int main() { wchar_t *foo = L"ðh"; wprintf(L"[%ls]\n", foo); return 0; } And when I compile it, it gives me the implicit declaration of function ‘wprintf’ warning. I know that I should link the wchar library during compilation, but how do I do that?

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• patter matching for custom read function

  - by altair211

  Hi, I am writing a custom read function for one of the data types in my module. For eg, when I do read "(1 + 1)" :: Data, I want it to return Plus 1 1. My data declaration is data Data = Plus Int Int. Thanks

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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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• Automatic creation of method definitions from declarations

  - by heeen

  Is there a tool, macro or plugin that can generate a method or function body automatically from a declaration in a header file? I have tried Intellisense and Refactor! 3.0.5 which both only seem to work with C#.

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• Flexible array member in C-structure

  - by Arpan

  Quoting from the C-std section 6.7.2.1, struct s { int n; double d[]; }; This is a valid structure declaration. I am looking for some practical use of this kind of syntax. To be precise, how is this construct any more or less powerful than keeping a double* as the 2nd element? Or is this another case of 'you-can-do-it-in-multiple-ways'? Arpan

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