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  • How to return a const QString reference in case of failure?

    - by moala
    Hi, consider the following code: const QString& MyClass::getID(int index) const { if (i < myArraySize && myArray[i]) { return myArray[i]->id; // id is a QString } else { return my_global_empty_qstring; // is a global empty QString } } How can I avoid to have an empty QString without changing the return type of the method? (It seems that returning an empty QString allocated on the stack is a bad idea) Thanks.

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  • How can I detect if a request and response cookies are different?

    - by Malcolm Frexner
    I need to detect if a request cookie - value is different from a response cookie - value. Its not as easy as: if(cookiesArePresent) { bool isDifferent = HttpContext.Current.Response.Cookies[".ASPXANONYMOUS"].value == HttpContext.Current.Response.Cookies[".ASPXANONYMOUS"].value; } But I read that changing the Response.Cookies changes the Request.Cookies. That would mean they are always the same if HttpContext.Current.Response.Cookies[".ASPXANONYMOUS"] was changed. Is there an easy way around this? http://chance.lindseydev.com/2009/04/aspnet-httprequestcookies-and.html

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  • Best way to get started with Facebook and Ruby on Rails

    - by TMB
    I'm looking to develop my first Facebook application and therefore looking for some advice on where to get started. I've spent a few hours browsing Facebook's Developer Wiki, Facebooker library, looking at the sample chapters in "Developing Facebook Applications with Rails" by Pragmatic Programmers, etc. Since FB is constantly changing their API, and Facebook Connect is newer than the aforementioned book, does anyone have any advice on where to get started?

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  • How are classes more secure than structures ?

    - by Asad Hanif
    Structure's member are public by default ans class's members are private by default. We can access private data members through a proper channel (using member function). If we have access to member functions we can read/write data in private data member, so how it is secure...we are accessing it and we are changing data too.....

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  • is const (c++) optional?

    - by Dr Deo
    according to some tutorials i read a while back, the "const" declaration makes a variable "constant" ie it cannot change later. But i find this const declaration abit inconveniencing since the compiler sometimes gives errors like "cannot convert const int to int" or something like that. and i find myself cheating by removing it anyway. question: assuming that i am careful about not changing a variable in my source code, can i happily forget about this const stuff? Thanks in advance

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  • How to delete a "Recurly" account completely from ruby api

    - by Subrahmanyam Konduri
    Can anyone please tell me how to delete a recurly account. As, I have tried with the following commands, r = Recurly::Account.find(account_code) r.delete And also, I have tried with "r.destroy". But, it only changing the state of recurly account from "active" to "closed" and not deleting the account completely. I am using rails 2.3.11 for this application. Thanks in advance. K. Subrahmanyam.

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  • Center current record in DataGridView

    - by Max
    When programmatically changing the current record in the DataGridView is it possible to make it in such way that this record would be centered (vertically) in the grid? When I change the current record it is shown either as the top row or as the bottom row. I'd like it to be in the middle. Would this be possible/simpler in WPF?

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  • How classes are secure than structures ?

    - by Asad Hanif
    Structure's member are public by default ans class's members are private by default. We can access private data members through a proper channel (using member function). If we have access to member functions we can read/write data in private data member, so how it is secure...we are accessing it and we are changing data too.....

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  • Can I change an NSDictionaries key?

    - by Mark Reid
    I have an NSDictionary object that is populated by NSMutableStrings for its keys and objects. I have been able to change the key by changing the original NSMutableString with the setString: method. They key however remains the same regardless of the contents of the string used to set the key initially. My question is, is the key protected from being changed meaning it will always be the same unless I remove it and add another to the dictionary? Thanks.

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  • Asp.Net (c#) - Read Excel Sheet.

    - by Pino
    I have a requirment to do some imports from an Excel spread sheet and have been looking at various examples on the web, they all seem to use the "Jet" driver which is not compatible with 64Bit. Now I am fully aware of the workarounds available (in changing how IIS runs etc) however I would like to know if there is repalcment for the "Jet" driver so I can read and generate excel sheets from Asp.Net running on a 64Bit server with no IIS modifications.

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  • How to generate unique serial number of machine in Delphi?

    - by noxwow
    Hi, I have question how to generate unique serial number of machine in Delphi? I tried to do this using the ID the motherboard or processor, but unfortunately it's unfortunately supported. Partition serial numbers, etc. fall off, because it is changing after the formatted. I'm looking for something that doesn't change after the formatted. Has anyone any idea?

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  • Mysql console slow on import of huge sql files

    - by Kennethvr
    My import of sql via the mysql console is rather slow and as our sql file is increasing every day I would like to know if there are any alternatives on how to import a sql file faster. Changing to oracle or other systems is no option, the configuration has to stay the same. Currently the sql file is: 1.5 Gb I'm on Wamp with Apache 2.2.14, PHP 5.2.11 and MySQL 5.1.41. Any suggestions?

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  • how to embed a webpage using wx?

    - by Giorgio Gelardi
    I need to show a webpage (a complex page with script and stuff, no static html) in a frame or something. It's for a desktop application, I'm using python 2.6 + wxPython 2.8.10.1. I need to catch some events too (mostly about changing page). I've found some samples using the webview module in a gtk application, but I couldn't have it works on wx.

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  • jquery animate - dead simple

    - by danit
    All I want to do is on .click() is .animate #slip, essentially Im changing the css at the moment from top: 10px to top: 0px Instead of it being quite clunky i'd like to animate the movement on the change of CSS. Currently use .toggleClass to achieve this: $("#div1").click(function() { $("#div2t").toggleClass('min'); });

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  • Is there a link to the "latest" jquery library on Google APIs?

    - by Nick Pierpoint
    I use the following for a jquery link in my <script> tags: http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.js Just wondered if anyone had discovered whether there's a link to the "latest" version: Something like the following (which doesn't work): http://ajax.googleapis.com/ajax/libs/jquery/latest/jquery.js (Obviously not necessarily a great plan to link your code to potentially changing libraries but useful in development)

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  • How to use another type of EditingControl in a single .NET 3.5 DataGridView column ?

    - by too
    Is this possible to have two (or more) different kinds of cells to be displayed interchangeably in single column of C# .Net 3.5 WinForms DataGridView? I know one column has specified single EditingControl type, yet I think grid is flexible enough to do some tricks, I may think of only: Adding as many invisible columns to grid as required types of cells and on CellBeginEdit somehow exchange current cell with other column's cell Creating custom column and custom cell with possibility of changing EditingControl for single cell Which approach is better, is there any other solution, are there any examples ?

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  • Using the same variable across multiple files in C++

    - by Sam152
    In the process of changing some code, I have spilt some functions into multiple files. I have the files controls.cpp and display.cpp and I would like to be able to have access to the same set of variables in both files. I don't mind where they are initialized or declared, as long as the functions in both files can use them. This was not an issue when the functions were in the same file, but now it seems almost impossible after an hour of googling and trying various things.

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