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What do two question marks together mean in C#?

... It's the null coalescing operator, and quite like the ternary (immediate-if) operator. See also ?? Operator - MSDN. FormsAuth = formsAuth ?? new FormsAuthenticationWrapper(); expands to: FormsAuth = formsAuth != null ? fo...
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Swift and mutating struct

There is something that I don't entirely understand when it comes to mutating value types in Swift. 7 Answers ...
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Why do you need to invoke an anonymous function on the same line?

...ut closures and saw this everywhere, but there is no clear explanation how it works - everytime I was just told to use it...: ...
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Protect .NET code from reverse engineering?

Obfuscation is one way, but it can't protect from breaking the piracy protection security of the application. How do I make sure that the application is not tampered with, and how do I make sure that the registration mechanism can't be reverse engineered? ...
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What to do about a 11000 lines C++ source file?

...) mainmodule.cpp source file in our project and every time I have to touch it I cringe. 34 Answers ...
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What are the differences between virtual memory and physical memory?

I am often confused with the concept of virtualization in operating systems. Considering RAM as the physical memory, why do we need the virtual memory for executing a process? ...
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Should I use tag for icons instead of ? [closed]

Facebook's HTML and Twitter Bootstrap HTML (before v3) both use the <i> tag to display icons. 7 Answers ...
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What is the exact problem with multiple inheritance?

I can see people asking all the time whether multiple inheritance should be included into the next version of C# or Java. C++ folks, who are fortunate enough to have this ability, say that this is like giving someone a rope to eventually hang themselves. ...
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Big-O for Eight Year Olds? [duplicate]

... operation on a data structure, I understand that the number of operations it has to perform won't grow because there are more items. And an O(n) operation would mean that you would perform a set of operations on each element. Could somebody fill in the blanks here? ...
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2D cross-platform game engine for Android and iOS? [closed]

I've worked for some time with Unity3d and found it's 2D part with OnGUI() or GUITextures too clumsy. Also, even a smallest game done on Unity3d is at least 10MB download which is just too much for a 2D game. ...