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How to Test a Concern in Rails

...test your concerns against the actual classes that use them (e.g., models) and you'll be able to test them everywhere they're used. And you only have to write the tests once and then just include them in any model spec that uses your concern. In your case, this might look something like this: # app...
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python: Change the scripts working directory to the script's own directory

... @EliCourtwright If __file__ is not already an absolute path, and the user has changed the working directory, then os.path.abspath will fail anyway. – Arthur Tacca Jan 17 '17 at 16:16 ...
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“You don't have a SNAPSHOT project in the reactor projects list.” when using Jenkins Maven release p

I'm using SVN, Maven 3.0.3 on the latest version of Jenkins and the Maven Release plugin. I'm trying to use the Maven release plugin (through Jenkins) do a dry run and so am executing the options … ...
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CSS3 transform not working

... My CSS works in Firefox but I've failed to replicate the effect in Chrome and Safari. I know IE doesn't support this CSS3 property so that's not a problem. ...
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Python dict how to create key or append an element to key?

...his answer suggests a far better way. In fact it gets set() as an argument and allows you to use add() method... – fatih_dur Feb 9 '16 at 2:27 ...
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What exactly is Heroku?

I just started learning Ruby on rails and I was wondering what Heroku really is? I know that its a cloud that helps us to avoid using servers? When do we actually use it? ...
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Is there an R function for finding the index of an element in a vector?

In R, I have an element x and a vector v . I want to find the first index of an element in v that is equal to x . I know that one way to do this is: which(x == v)[[1]] , but that seems excessively inefficient. Is there a more direct way to do it? ...
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Are Roslyn SyntaxNodes reused?

I've been taking a look to Roslyn CTP and, while it solves a similar problem to the Expression tree API , both are immutable but Roslyn does so in a quite different way: ...
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ICollection Vs List in Entity Framework

...ntity Framework applications. I really didn't read that much documentation and I feel like I am suffering for it now. 4 Ans...
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When would you use .git/info/exclude instead of .gitignore to exclude files?

I am a bit confused about the pros and cons of using .git/info/exclude and .gitignore to exclude files. 4 Answers ...