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Use cases for the 'setdefault' dict method

The addition of collections.defaultdict in Python 2.5 greatly reduced the need for dict 's setdefault method. This question is for our collective education: ...
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Sort JavaScript object by key

I need to sort JavaScript objects by key. 31 Answers 31 ...
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How to verify if a file exists in a batch file?

I have to create a .BAT file that does this: 3 Answers 3 ...
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Java: Class.this

I have a Java program that looks like this. 5 Answers 5 ...
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HTTP vs HTTPS performance

Are there any major differences in performance between http and https? I seem to recall reading that HTTPS can be a fifth as fast as HTTP. Is this valid with the current generation webservers/browsers? If so, are there any whitepapers to support it? ...
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How do I iterate through the files in a directory in Java?

I need to get a list of all the files in a directory, including files in all the sub-directories. What is the standard way to accomplish directory iteration with Java? ...
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How do I revert a Git repository to a previous commit?

How do I revert from my current state to a snapshot made on a certain commit? 41 Answers ...
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Does “untyped” also mean “dynamically typed” in the academic CS world?

I'm reading a slide deck that states "JavaScript is untyped." This contradicted what I thought to be true so I started digging to try and learn more. ...
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Should enums in C# have their own file? [closed]

I have a class which uses an enumeration, the enum is currently in its own file which seems wasteful. 15 Answers ...
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Are there any O(1/n) algorithms?

Are there any O(1/n) algorithms? 32 Answers 32 ...