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\d is less efficient than [0-9]
I made a comment yesterday on an answer where someone had used [0123456789] in a regular expression rather than [0-9] or \d . I said it was probably more efficient to use a range or digit specifier than a character set.
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how to change directory using Windows command line
I'm using cmd.exe (C:\WINDOWS\System32\cmd.exe) and I have to change my current directory to "D:\temp" i.e. temp folder in the D drive.
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What is the best way to implement nested dictionaries?
I have a data structure which essentially amounts to a nested dictionary. Let's say it looks like this:
21 Answers
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How to convert milliseconds to “hh:mm:ss” format?
I'm confused. After stumbling upon this thread, I tried to figure out how to format a countdown timer that had the format hh:mm:ss .
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Go > operators
Could someone please explain to me the usage of << and >> in Go? I guess it is similar to some other languages.
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Run automatically program on startup under linux ubuntu [closed]
I'd need a program to be run every time I startup my ubuntu linux. So I'd need to add it to my startup programs list. Just one problem: I'd need to do it via terminal.
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C++ 取得系统当前时间 - C/C++ - 清泛网 - 专注C/C++及内核技术
C++ 取得系统当前时间方法一，只能精确到秒#include <time.h> time_t tt = time(NULL); 这句返回的只是一个时间戳 tm* t= localtime(&tt); printf("%d...方法一，只能精确到秒
#include <time.h>
time_t tt = time(NULL);//这句返回的只是一个时间戳
tm* t= l...
How does deriving work in Haskell?
Algebraic Data Types (ADTs) in Haskell can automatically become instances of some typeclasse s (like Show , Eq ) by deriving from them.
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More elegant way of declaring multiple variables at the same time
To declare multiple variables at the "same time" I would do:
10 Answers
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How to print a date in a regular format?
This is my code:
22 Answers
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