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How do I get a file extension in PHP?

This is a question you can read everywhere on the web with various answers: 28 Answers ...
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In Python, how do you convert a `datetime` object to seconds?

Apologies for the simple question... I'm new to Python... I have searched around and nothing seems to be working. 10 Answer...
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What is the difference between a directory and a folder?

Most people use the terms "folder" and "directory" interchangeably. From a programmer point of view, is there a difference, and if so, what is it? Does it depend on the OS, or is there a broad, general consensus? This at least suggests that there is a difference. ...
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Cocoa: What's the difference between the frame and the bounds?

UIView and its subclasses all have the properties frame and bounds . What's the difference? 12 Answers ...
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Can I combine :nth-child() or :nth-of-type() with an arbitrary selector?

Is there a way to select every nth child that matches (or does not match) an arbitrary selector ? For example, I want to select every odd table row, but within a subset of the rows: ...
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What are the details of “Objective-C Literals” mentioned in the Xcode 4.4 release notes?

I was going through the release notes for Xcode 4.4 and noticed this: 3 Answers 3 ...
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Official reasons for “Software caused connection abort: socket write error”

Given this stack trace snippet 14 Answers 14 ...
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Get selected value of a dropdown's item using jQuery

How can I get the selected value of a dropdown box using jQuery? I tried using 30 Answers ...
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What is the difference between __dirname and ./ in node.js?

When programming in Node.js and referencing files that are located somewhere in relation to your current directory, is there any reason to use the __dirname variable instead of just a regular ./ ? I've been using ./ thus far in my code and just discovered the existence of __dirname , and essenti...
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Showing Travis build status in GitHub repo

I remember recently seeing the Travis build status of a pr or commit in GitHub browsing the repository (but can't find where). I'm not talking about the Travis build status images in README.md but an actual GitHub feature (green box with a friendly check mark). ...