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What does -> mean in Python function definitions?
...to attach a metadata string to various types of object. This is amazingly handy, so Python 3 extends the feature by allowing you to attach metadata to functions describing their parameters and return values.
There's no preconceived use case, but the PEP suggests several. One very handy one is to al...
What is the difference between precision and scale?
What is the difference between precision and scale in Oracle? In tutorials they usually leave scale empty and set precision to 6 when creating a primary key.
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Why use Abstract Base Classes in Python?
...cause I am used to the old ways of duck typing in Python, I fail to understand the need for ABC (abstract base classes). The help is good on how to use them.
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A std::map that keep track of the order of insertion?
...ring,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 are sorted according to the string; but ...
Visual Studio : short cut Key : Duplicate Line
Is there a shortcut for Duplicate Line command in Visual Studio 2008?
30 Answers
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Swapping column values in MySQL
I have a MySQL table with coordinates, the column names are X and Y. Now I want to swap the column values in this table, so that X becomes Y and Y becomes X. The most apparent solution would be renaming the columns, but I don't want to make structure changes since I don't necessarily have permission...
What is difference between cacerts and keystore?
What's the difference between the two, cacerts and keystore?
4 Answers
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What is the difference D3 datum vs. data?
Can someone please explain the difference between datum() and data() in D3.js? I see both being used and I am not sure why you should choose one over the other?
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Should methods in a Java interface be declared with or without a public access modifier?
...d, but discouraged as a matter of style, to redundantly specify the public and/or abstract modifier for a method declared in an interface.
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Simplest way to do a fire and forget method in C#?
...perationContract(IsOneWay = true)] attribute. But WCF seems kind of slow and heavy just to do create a nonblocking function. Ideally there would be something like static void nonblocking MethodFoo(){} , but I don't think that exists.
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