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Call int() function on every list element?
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This is what list comprehensions are for:
numbers = [ int(x) for x in numbers ]
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What breaking changes are introduced in C++11?
...+11 that will cause some old code to stop compiling: the introduction of explicit operator bool() in the standard library, replacing old instances of operator void*() . Granted, the code that this will break is probably code that should not have been valid in the first place, but it's still a bre...
What is a Question Mark “?” and Colon “:” Operator Used for? [duplicate]
...'s not the only ternary operator, just the most common one.
Here's a good example from Wikipedia demonstrating how it works:
A traditional if-else construct in C, Java and JavaScript is written:
if (a > b) {
result = x;
} else {
result = y;
}
This can be rewritten as the following state...
How to install Java SDK on CentOS?
I have CentOS 5, but I don't know the steps to install Java SDK on Linux.
12 Answers
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Select by partial string from a pandas DataFrame
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Since str.* methods treat the input pattern as a regular expression, you can use df[df['A'].str.contains("Hello|Britain")]
– Garrett
Jun 27 '13 at 19:20
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What languages are Windows, Mac OS X and Linux written in?
I was just wondering who knows what programming languages Windows, Mac OS X and Linux are made up from and what languages are used for each part of the OS (ie: Kernel, plug-in architecture, GUI components, etc).
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How to Sort a List by a property in the object
...e Sort method, passing a Comparison<T> delegate:
objListOrder.Sort((x, y) => x.OrderDate.CompareTo(y.OrderDate));
If you prefer to create a new, sorted sequence rather than sort in-place then you can use LINQ's OrderBy method, as mentioned in the other answers.
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Deep null checking, is there a better way?
...of the language.
Update (2014):
The ?. operator is now planned for the next Roslyn compiler release. Note that there is still some debate over the exact syntactic and semantic analysis of the operator.
Update (July 2015): Visual Studio 2015 has been released and ships with a C# compiler that supp...
C/C++ NaN constant (literal)?
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Or you can compare the number to itself – x == x returns false iff x is NaN.
– Archie
May 22 '13 at 12:10
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How to use Boost in Visual Studio 2010
What is a good step by step explanation on how to use the Boost library in an empty project in Visual Studio?
13 Answers
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