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SQL Server IN vs. EXISTS Performance

I'm curious which of the following below would be more efficient? 9 Answers 9 ...
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Best Practice: Initialize JUnit class fields in setUp() or at declaration?

Should I initialize class fields at declaration like this? 9 Answers 9 ...
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How do you create a static class in C++?

How do you create a static class in C++? I should be able to do something like: 13 Answers ...
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List comprehension vs map

Is there a reason to prefer using map() over list comprehension or vice versa? Is either of them generally more efficient or considered generally more pythonic than the other? ...
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Checking in of “commented out” code [closed]

Ok, here is something that has caused some friction at my current job and I really didn't expect it to. Organized in house software development is a new concept here and I have drawn up a first draft of some coding guidelines. ...
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“var” or no “var” in JavaScript's “for-in” loop?

What's the correct way to write a for-in loop in JavaScript? The browser doesn't issue a complaint about either of the two approaches I show here. First, there is this approach where the iteration variable x is explicitly declared: ...
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When to use extern in C++

I'm reading "Think in C++" and it just introduced the extern declaration. For example: 4 Answers ...
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A monad is just a monoid in the category of endofunctors, what's the problem?

Who first said the following? 5 Answers 5 ...
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What is the difference between i++ and ++i?

I've seen them both being used in numerous pieces of C# code, and I'd like to know when to use i++ or ++i ( i being a number variable like int , float , double , etc). Anyone who knows this? ...
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Fast way of finding lines in one file that are not in another?

I have two large files (sets of filenames). Roughly 30.000 lines in each file. I am trying to find a fast way of finding lines in file1 that are not present in file2. ...