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What is Rack middleware?
What is Rack middleware in Ruby? I couldn't find any good explanation for what they mean by "middleware".
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How does Git handle symbolic links?
If I have a file or directory that is a symbolic link and I commit it to a Git repository, what happens to it?
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What is std::move(), and when should it be used?
Good links are appreciated.
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Performance surprise with “as” and nullable types
I'm just revising chapter 4 of C# in Depth which deals with nullable types, and I'm adding a section about using the "as" operator, which allows you to write:
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When is the init() function run?
I've tried to find a precise explanation of what the init() function does in Go. I read what Effective Go says but I was unsure if I understood fully what it said. The exact sentence I am unsure is the following:
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List directory tree structure in python?
I know that we can use os.walk() to list all sub-directories or all files in a directory. However, I would like to list the full directory tree content:
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throwing exceptions out of a destructor
Most people say never throw an exception out of a destructor - doing so results in undefined behavior. Stroustrup makes the point that "the vector destructor explicitly invokes the destructor for every element. This implies that if an element destructor throws, the vector destruction fails... The...
Setup RSpec to test a gem (not Rails)
It is pretty easy with the added generator of rspec-rails to setup RSpec for testing a Rails application. But how about adding RSpec for testing a gem in development?
I am not using jeweler or such tools. I just used Bundler ( bundle gem my_gem ) to setup the structure for the new gem and edit the *...
Why should casting be avoided? [closed]
I generally avoid casting types as much as possible since I am under the impression that it's poor coding practice and may incur a performance penalty.
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Covariance and contravariance real world example
I'm having a little trouble understanding how I would use covariance and contravariance in the real world.
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