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Random row selection in Pandas dataframe
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6 Answers
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Active
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Javascript regex returning true.. then false.. then true.. etc [duplicate]
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/^[^-_]([a-z0-9-_]{4,20})[^-_]$/gi;
You're using a g (global) RegExp. In JavaScript, global regexen have state: you call them (with exec, test etc.) the first time, you get the first match in a given string. Call them again and ...
Does C++ support 'finally' blocks? (And what's this 'RAII' I keep hearing about?)
...ing a mutex:
// A class with implements RAII
class lock
{
mutex &m_;
public:
lock(mutex &m)
: m_(m)
{
m.acquire();
}
~lock()
{
m_.release();
}
};
// A class which uses 'mutex' and 'lock' objects
class foo
{
mutex mutex_; // mutex for l...
Unit testing private methods in C#
... needs to be tested.
– AxD
Aug 25 '16 at 23:48
8
its not intrinsic, some OO languages don't have...
Learning Python from Ruby; Differences and Similarities
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answered Jan 22 '11 at 16:41
Clint MillerClint Miller
13.7k33 gold badges3333 silver badges3838 bronze badges
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How to print a dictionary line by line in Python?
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I do print(json.dumps(cars, indent=4, ensure_ascii=False)) because otherwise non-ASCII characters are unreadable.
– Boris
Apr 22 at 16:36
add a ...
Namespace not recognized (even though it is there)
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261
Check to make sure that your project isn't set up to use the .NET Framework 4 Client Profile.
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Using “super” in C++
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156
Bjarne Stroustrup mentions in Design and Evolution of C++ that super as a keyword was considered...
Managing constructors with many parameters in Java
...er the following example
public class StudentBuilder
{
private String _name;
private int _age = 14; // this has a default
private String _motto = ""; // most students don't have one
public StudentBuilder() { }
public Student buildStudent()
{
return new Student...
VIM Disable Automatic Newline At End Of File
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gcbgcb
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