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How do I exchange keys with values in a dictionary?
I receive a dictionary as input, and would like to to return a dictionary whose keys will be the input's values and whose value will be the corresponding input keys. Values are unique.
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How do I check if a variable exists?
I want to check if a variable exists. Now I'm doing something like this:
11 Answers
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How to set Default Controller in asp.net MVC 4 & MVC 5
How do I set Default Controller for my ASP.NET MVC 4 project without making it HomeController ?
4 Answers
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Why are quaternions used for rotations?
I'm a physicist, and have been learning some programming, and have come across a lot of people using quaternions for rotations instead of writing things in matrix/vector form.
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Why not use always android:configChanges=“keyboardHidden|orientation”?
I was wondering why not use android:configChanges="keyboardHidden|orientation" in every (almost every ;)) activity?
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How using try catch for exception handling is best practice
while maintaining my colleague's code from even someone who claims to be a senior developer, I often see the following code:
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Use of Finalize/Dispose method in C#
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The recommended IDisposable pattern is here. When programming a class that uses IDisposable, generally you should use two patterns:
When implementing a sealed class that doesn't use unmanaged resources, you simply implement a Dispose method as with normal interface implementations:...
Why are function pointers and data pointers incompatible in C/C++?
I have read that converting a function pointer to a data pointer and vice versa works on most platforms but is not guaranteed to work. Why is this the case? Shouldn't both be simply addresses into main memory and therefore be compatible?
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IEnumerable and Recursion using yield return
I have an IEnumerable<T> method that I'm using to find controls in a WebForms page.
8 Answers
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Java's L number (long) specification
It appears that when you type in a number in Java, the compiler automatically reads it as an integer, which is why when you type in (long) 6000000000 (not in integer's range) it will complain that 6000000000 is not an integer. To correct this, I had to specify 6000000000L . I just learned abo...