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What is a difference between
What is the difference between <? super E> and <? extends E> ?
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How can I add an empty directory to a Git repository?
How can I add an empty directory (that contains no files) to a Git repository?
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Python using enumerate inside list comprehension
Lets suppose I have a list like this:
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Is there an alternative to bastard injection? (AKA poor man's injection via default constructor)
I most commonly am tempted to use "bastard injection" in a few cases. When I have a "proper" dependency-injection constructor:
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Why are private fields private to the type, not the instance?
In C# (and many other languages) it's perfectly legitimate to access private fields of other instances of the same type. For example:
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A std::map that keep track of the order of insertion?
I currently have a std::map<std::string,int> that stores an integer value to an unique string identifier, and I do look up with the string. It does mostly what I want, except for that it does not keep track of the insertion order. So when I iterate the the map to print out the values, they a...
What does %s mean in a python format string?
What does %s mean in Python? And what does the following bit of code do?
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Java generics type erasure: when and what happens?
I read about Java's type erasure on Oracle's website .
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Difference between Lookup() and Dictionary(Of list())
I'm trying to wrap my head around which data structures are the most efficient and when / where to use which ones.
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Why does .NET foreach loop throw NullRefException when collection is null?
So I frequently run into this situation... where Do.Something(...) returns a null collection, like so:
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