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What's the difference between require and require-dev? [duplicate]

I'm new to the composer and I would like to know the difference between require and require-dev . The composer website doesn't offer a good explanation the difference between these two. ...
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Check existence of directory and create if doesn't exist

...ry(s). What I've written below will check for the existence of a directory and move into it, or create the directory and then move into it. Is there a better way to approach this? ...
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What are some common uses for Python decorators? [closed]

...ple! No idea what it does though. An explanation what you are doing there, and how the decorator solves the problem would be very nice. – MeLight Jun 15 '14 at 16:00 8 ...
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JSHint and jQuery: '$' is not defined

...ferred approach is to create a .jshintrc file in the root of your project, and put this config in it: { "globals": { "$": false } } This declares to JSHint that $ is a global variable, and the false indicates that it should not be overridden. The .jshintrc file was not supported ...
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Type List vs type ArrayList in Java [duplicate]

I understand that with (1), implementations of the List interface can be swapped. It seems that (1) is typically used in an application regardless of need (myself I always use this). ...
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Can I set subject/content of email using mailto:?

... Yes, look all tips and tricks with mailto: http://www.angelfire.com/dc/html-webmaster/mailto.htm mailto subject example: <a href="mailto:no-one@snai1mai1.com?subject=free chocolate">example</a> mailto with content: ...
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Difference between Convert.ToString() and .ToString()

What is the difference between Convert.ToString() and .ToString() ? 19 Answers 19 ...
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Convert int to ASCII and back in Python

I'm working on making a URL shortener for my site, and my current plan (I'm open to suggestions) is to use a node ID to generate the shortened URL. So, in theory, node 26 might be short.com/z , node 1 might be short.com/a , node 52 might be short.com/Z , and node 104 might be short.com/ZZ . When...
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How to understand nil vs. empty vs. blank in Ruby

...dly looking for a clear definition of the differences of nil? , blank? , and empty? in Ruby on Rails. Here's the closest I've come: ...
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You have already activated rake 0.9.0, but your Gemfile requires rake 0.8.7

... to make sure that rake is mentioned in your Gemfile. If it's not, add it, and specify the version "you already activated". Then, you'll need to tell bundle to update the rake version it's using for your app: bundle update rake It'll update your Gemfile.lock for you. ...