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How to reshape data from long to wide format
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answered May 4 '11 at 23:20
ChaseChase
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How do I draw a grid onto a plot in Python?
...lot using pylab in Python and now I would like to superimpose a grid of 10x10 onto the scatter plot. How do I do that?
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lua和c/c++互相调用实例分析 - C/C++ - 清泛网 - 专注C/C++及内核技术
... do{printf("[%s:%d]"fmt"\n",__FILE__,__LINE__,##args);exit(num);} while(0)
#define err_return(num,fmt,args) \
do{printf("[%s:%d]"fmt"\n",__FILE__,__LINE__,##args);return(num);} while(0)
//lua中调用的c函数定义,实现加法
int csum(lua_State* l)
{
int a = lua_tointeger(l,1...
Generate random integers between 0 and 9
How can I generate random integers between 0 and 9 (inclusive) in Python?
19 Answers
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How do I achieve the theoretical maximum of 4 FLOPs per cycle?
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+150
I've done this exact task before. But it was mainly to measure power consumption and CPU temperatures. The following code (which is fa...
Detect if Visual C++ Redistributable for Visual Studio 2012 is installed
How to detect if Visual C++ Redistributable for Visual Studio 2012 is installed?
20 Answers
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Regex to validate password strength
...itive look ahead assertions:
^(?=.*[A-Z].*[A-Z])(?=.*[!@#$&*])(?=.*[0-9].*[0-9])(?=.*[a-z].*[a-z].*[a-z]).{8}$
Rubular link
Explanation:
^ Start anchor
(?=.*[A-Z].*[A-Z]) Ensure string has two uppercase letters.
(?=.*[!@#$&*]) Ensure string ha...
What does |= (ior) do in Python?
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Here we apply merge (|) and update (|=) to dicts:
>>> d1 = {"a": 0, "b": 1, "c": 2}
>>> d2 = {"c": 20, "d": 30}
>>> # Merge, |
>>> d1 | d2
{"a": 0, "b": 1, "c": 20, "d": 30}
>>> d1
{"a": 0, "b": 1, "c": 2}
>>> # Update, |=
>>> d1 |=...
Given an RGB value, how do I create a tint (or shade)?
Given an RGB value, like 168, 0, 255 , how do I create tints (make it lighter) and shades (make it darker) of the color?
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Getting random numbers in Java [duplicate]
I would like to get a random value between 1 to 50 in Java.
2 Answers
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