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Difference between setUp() and setUpBeforeClass()

When unit testing with JUnit, there are two similar methods, setUp() and setUpBeforeClass() . What is the difference between these methods? Also, what is the difference between tearDown() and tearDownAfterClass() ? ...
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How can I find the first occurrence of a sub-string in a python string?

... @Regressor: look into regex and word boundaries. – mechanical_meat Apr 12 at 23:29 add a comment  |  ...
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How to discard local commits in Git?

I'd been working on something, and decided it was completely screwed...after having committed some of it. So I tried the following sequence: ...
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Detect & Record Audio in Python

...ssing. The problem is that I need to determine when there is audio present and then record it, stop when it goes silent and then pass that file to the processing module. ...
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Fixed position but relative to container

...on. It is now possible to center content of an dynamic size (horizontally and vertically) with the help of the magic of CSS3 transform. The same principle applies, but instead of using margin to offset your container, you can use translateX(-50%). This doesn't work with the above margin trick bec...
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In git, what is the difference between merge --squash and rebase?

I'm new to git and I'm trying to understand the difference between a squash and a rebase. As I understand it you perform a squash when doing a rebase. ...
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How to take column-slices of dataframe in pandas

...achine learning data from a CSV file. The first 2 columns are observations and the remaining columns are features. 10 Answe...
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Convert XML to JSON (and back) using Javascript

How would you convert from XML to JSON and then back to XML? 12 Answers 12 ...
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How to add reference to System.Web.Optimization for MVC-3-converted-to-4 app

...e Microsoft.Web.Optimization package is now obsolete. With ASP.NET (MVC) 4 and higher you should install the Microsoft ASP.NET Web Optimization Framework: Install the package from nuget: Install-Package Microsoft.AspNet.Web.Optimization Create and configure bundle(s) in App_Start\BundleConfig.cs...
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Difference between socket and websocket?

...lications that require a permanent connection to its server. On the other hand, plain sockets are more powerful and generic. They run over TCP/IP but they are not restricted to browsers or HTTP protocol. They could be used to implement any kind of communication. No. There is no reason. ...