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• Differentiate between TCHAR and _TCHAR

  - by Vulcan Eager

  What are the various differences between the two symbols TCHAR and _TCHAR type defined in the Windows header tchar.h? Explain with examples. Briefly describe scenarios where you would use TCHAR as opposed to _TCHAR in your code. (10 marks)

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• Create a new instance in a static function of an abstract class

  - by arno

  abstract class db_table { static function get_all_rows() { ... while(...) { $rows[] = new self(); ... } return $rows; } } class user extends db_table { } $rows = user::get_all_rows(); I want to create instances of a class from a static method defined in the abstract parent class but PHP tells me "Fatal error: Cannot instantiate abstract class ..." How should I implement it correctly?

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• C++ Pass a hidden arg to a class constructor?

  - by JP

  I would like to define a class that accept the pointer to it's parent class as an Argument, but would it be possible to somehow pass it without needing to pass it directly such as: class Child { public: Child(Parent* hiddenArg); }; class Parent { public: Child myChild; }; I know this is weird, but I am making my own Signal/Slot implementation and Child would be a signal defined, but I would like to get the parent so I can use it's Event Dispatcher...

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• how to detect if a property exists on a dynamic object in C# ?

  - by Softion

  In javascript you can detect if a property is defined by using the undefined keyword: if( data.myProperty == undefined ) ... How would you do this in C# using the dynamic keyword with an ExpandeObject and without throwing an exception ?

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• Calling a C function in a pro*C file

  - by Sachin Chourasiya

  I have these line in my pro*C program. The function initAerage is defined in a C language and I am trying to call this function in a .pcc (pro C++) file. I am getting an error Error: initAverage(int i);was declared before with a different language extern "C" { int initAverage(int i); } Please help

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• Does Entity Framework currently support custom functions in the Where clause?

  - by André Pena

  Entity Framework currently supports table valued functions and custom functions defined in the SSDL, but I can't find any example of it being used as a criteria, in the where clause. Example: var query = this.db.People; query = query.Where(p = FullText.ContainsInName(p.Id, "George")); In this example, ContainsInName is my custom function that I want to be executed in the where clause of the query. Is it supported?

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• Where to initialize a NSMutableArray?

  - by eco_bach

  Hi having an issue using a NSMutableArray; In my implementation file applicationDidFinishLaunching method I have _imgArray = [NSMutableArray array]; and _imgArray is defined in my .h file as NSMutableArray *_imgArray; After populating it, it traces out correctly. The problem is, in another method in my implementation file, I can't seem to acces the _imgArray array. It traces out to _imgArray= ar.lproj What gives?

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• Displaying validation control in a div tag

  - by JaiGanesh

  I have a div tag for which i have defined a border. i have given the validation control inside the div tag Now before clicking the "submit" i get to see the div tag and border. - how to avoid this Now after clicking the "submit" i get to see the div tag and border- which is exptected and correct. My question how to hide the border in the div tag before clicking the "submit" button or on the click of the "cancel" button

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• problem with selecting a rows in advanced datagrid using keydown event

  - by user365559

  Hi, I have advanced datagrid with list of items is displayed.I am using keydown for selecting the rows.But the actual problem is when i am selecting the items after the 2nd item it should move to the 3rd item but instead of that its moving back to the 1st item.I have defined selectionmode property to singlerows even then the result same to be same.can any one give me the soloution.

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• Is there a way to stop all javascript on the page?

  - by M28

  I need to stop all the javascript running on the page, but I have a limitation: I cannot control the tags content, I am editing the page after it's being loaded. Also, I need to remove all the variables defined by the old script that was running and stop all the intervals.

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• Mocking view helpers with rspec-rails 2.0.0.beta.8

  - by snl

  I am trying to mock a view helper with rspec2. The old way of doing this throws an error, complaining the template object is not defined: template.should_receive(:current_user).and_return(mock("user")) Am I missing something here, or is this not implemented in rspec2 (yet)?

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• VIM plugin for updating C++ function definition

  - by Sunny

  I'm looking for a VIM plugin that can do these kind of thing. Let's say I have a function in a .cpp file void myFunction(int arg1, int arg2, int arg3){ //code } The function definition is defined in the .h file. So every time I change the function name or add a new argument to the function, I have to go back the the .h file to do the same. Is there a VIM plugin that can automate this task?

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• [CakePHP] Dynamic fields on insert/edit form

  - by user198003

  hi all, let's say that i have 3 tables: books properties book_properties of course, i would like that when i want to insert new book (or update existing), to fill the form. fields that exist on form have to be defined as records in table properties. when i fill up those fields, data has to be saved in table book_properties. can you help me by giving some advices and references, how to achieve that? thank you very much in advance!

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• Visual Studio: how does VS decide to build a release or debug exe

  - by Snake

  Hi, I just created a new project configuration. I named it 'Blah' So no 'debug' in it. Now how does Visual Studio know when to compile a debug file or a release file. is this merely defined by the DEBUG constant? Or am I wrong? :) Thanks

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• What is DEFAULT_CC in function declaration?

  - by humoeba

  I'm relatively new to C, and am curious what this syntax means in a function declaration: int DEFAULT_CC foo(void) where DEFAULT_CC is probably defined somewhere else as: #define DEFAULT_CC "cc" Is this a direction to use a certain compiler or something?

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• Under what conditions will you get unresolved external symbol for __declspec(dllimport)?

  - by Mark

  I am converting an application to use .dlls and I'm riddled with linker errors stating unersolved external symbol"__declspec(dllimport) public: void __thiscall Rail::SetNextrail(class Rail *)" There is more gibberish at the end of this error message. Why should this happen and how do you fix it? __declspec(dllimport) is being placed with a macro defined as: #ifdef LUDOAI_EXPORT #define DECLSPECAI __declspec(dllexport) #else #define DECLSPECAI __declspec(dllimport) #endif

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• Getting text boxes on a webpage

  - by C-UNIT

  So what I am trying to do is make an application (just for fun, not a lot of purpose), where when you launch it a interface comes up consisting of Username: textboxhere Password: textbox2here then a connect button, and when you fill out your information in the textboxs' then click Connect, it navigates to facebook.com and puts in your information that you defined in the textbox and logs you in. Any ideas guys?

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• Why can't decrease the size of a struct when substitute old library?

  - by solotim

  As for C programming, one of the rules when we create new version of existing shared library is that we can't decrease the size of struct defined in that library. Why does this have to be obeyed?

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• How and where do you define your own Exception hierarchy in Java?

  - by EugeneP

  How and where do you define your own Exception hierarchy in Java? My main question concerns package location where they your Exception classes must be defined. Do we create a special package ourexceptions and put all classes inside it?

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• Haskell and random numbers

  - by John D.

  Hi, I've been messing with Haskell few days and stumbled into a problem. I need a method that returns a random list of integers ( Rand [[Int]] ). So, I defined a type: type Rand a = StdGen -> (a, StdGen). I was able to produce Rand IO Integer and Rand [IO Integer] ( (returnR lst) :: StdGen -> ([IO Integer], StdGen) ) somehow. Any tips how to produce Rand [[Int]]?

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• Help using recursion in Java

  - by Mercer

  I have a class Group. In the class I have two fields, idGroup IdGroupGroup. Groups may be part of other groups. My class Group is defined in a HashMap<Integer,Integer>; the key is IdGroupGroup and value is idGroup. I want to search the map for a particular idGroup; can I use recursion to do this?

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• How do I Make Management Studio Express use proxy settings to connect to online SQL service

  - by TheAgent

  It doesn't seem like SQL Management Studio Express 2005 considers Internet Options proxy settings defined for the LAN when trying to connect to SQL Server 2005. Is there a way to make it use the proxy settings?

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• What is the difference between a Map and a Dictionary?

  - by devoured elysium

  What is the difference between a Map and a Dictionary? I am not asking for how they are defined in language X or Y(which seems to be what generally people are asking here on SO), I want to know what is their difference in theory. I know a Map is an object that maps keys to values. Isn't a Dictionary the same? Thanks

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• Lookups in Multi-Tenant Database

  - by Huthaifa Afanah

  I am developing a SaaS application and I am looking for the best way to design lookup tables, taking in consideration: The look-up tables will have predefined data shared among all the tenants Each tenant must have the ability to extend the look-up table with his own data e.g adding a car class not defined I am thinking about adding TenantID column to each lookup and add the predefined data with setting that column to some value which represents the "Super Tenant" that belongs to the system itself

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• Constant member

  - by TGadfly

  I have structure defined in some header (D3DXVECTOR3) How can I declare: static member in the class of that type and initialize it? maybe constant member of that type and init it? when i use some constructor i get error only integral can be initialized.

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