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Joining three tables using MySQL

I have three tables named 8 Answers 8 ...
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Just what is an IntPtr exactly?

Through using IntelliSense and looking at other people's code, I have come across this IntPtr type; every time it has needed to be used I have simply put null or IntPtr.Zero and found most functions to work. What exactly is it and when/why is it used? ...
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Easiest way to compare arrays in C#

In Java, Arrays.equals() allows to easily compare the content of two basic arrays (overloads are available for all the basic types). ...
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filename and line number of python script

How can I get the file name and line number in python script. 9 Answers 9 ...
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Convert base class to derived class [duplicate]

Is it possible in C# to explicitly convert a base class object to one of it's derived classes? Currently thinking I have to create a constructor for my derived classes that accept a base class object as a parameter and copy over the property values. I don't really like this idea, so I'd like to avoi...
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Git error when trying to push — pre-receive hook declined

When I try and push a change I've commited, I get the following error ... 27 Answers 2...
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What is the most efficient Java Collections library? [closed]

What is the most efficient Java Collections library? 12 Answers 12 ...
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How do I URL encode a string

I have a URL string ( NSString ) with spaces and & characters. How do I url encode the entire string (including the & ampersand character and spaces)? ...
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Can an abstract class have a constructor?

Can an abstract class have a constructor? 22 Answers 22 ...
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Catch a thread's exception in the caller thread in Python

I'm very new to Python and multithreaded programming in general. Basically, I have a script that will copy files to another location. I would like this to be placed in another thread so I can output .... to indicate that the script is still running. ...