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When should I use Lazy?
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answered Jul 27 '11 at 16:16
James Michael HareJames Michael Hare
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Python中的X[:,0]和X[:,1] - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
Python中的X[:,0]和X[:,1]X[:,0]是numpy中数组的一种写法，表示对一个二维数组，取该二维数组第一维中的所有数据，第二维中取第0个数据，直观来说，X[:,0]就是取所有 X[:,0]是numpy中数组的一种写法，表示对一个二维数组，取该二维...
String formatting in Python 3
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174
Here are the docs about the "new" format syntax. An example would be:
"({:d} goals, ${:d})".f...
Most efficient way of making an if-elif-elif-else statement when the else is done the most?
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100
The code...
options.get(something, doThisMostOfTheTime)()
...looks like it ought to be fast...
Format decimal for percentage values?
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answered Nov 24 '09 at 15:56
Michael HarenMichael Haren
93.9k3939 gold badges157157 silver badges198198 bronze badges
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Difference between var_dump,var_export & print_r
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194
var_dump is for debugging purposes. var_dump always prints the result.
// var_dump(array('', ...
C# Regex for Guid
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184
This one is quite simple and does not require a delegate as you say.
resultString = Regex.Rep...
Getting image dimensions without reading the entire file
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106
Your best bet as always is to find a well tested library. However, you said that is difficult,...
What is more efficient? Using pow to square or just multiply it with itself?
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std::cout << elapsed << " "; \
\
return x; \
}
TEST(1, b)
TEST(2, b*b)
TEST(3, b*b*b)
TEST(4, b*b*b*b)
TEST(5, b*b*b*b*b)
template <int exponent>
double testpow(double base, long loops)
{
double x = 0.0;
boost::posix_time::ptime startTime = now();
for (long...