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Why is this F# code so slow?
A Levenshtein implementation in C# and F#. The C# version is 10 times faster for two strings of about 1500 chars. C#: 69 ms, F# 867 ms. Why? As far as I can tell, they do the exact same thing? Doesn't matter if it is a Release or a Debug build.
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The modulo operation on negative numbers in Python
...nually fix it up by adding 7:
int result = (2 - N) % 7;
return result < 0 ? result + 7 : result;
(See http://en.wikipedia.org/wiki/Modulo_operator for how the sign of result is determined for different languages.)
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.NET JIT potential error?
...o, and running the release outside Visual Studio. I'm using Visual Studio 2008 and targeting .NET 3.5. I've also tried .NET 3.5 SP1.
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Iterating over a numpy array
...>>> for (x,y), value in numpy.ndenumerate(a):
... print x,y
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0 0
0 1
1 0
1 1
2 0
2 1
Regarding the performance. It is a bit slower than a list comprehension.
X = np.zeros((100, 100, 100))
%timeit list([((i,j,k), X[i,j,k]) for i in range(X.shape[0]) for j in range(X.shape[1]) for k...
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...
Running a cron job at 2:30 AM everyday
How to configure a cron job to run every night at 2:30? I know how to make it run at 2, but not 2:30.
6 Answers
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Implement Stack using Two Queues
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Richard
40.9k2222 gold badges134134 silver badges203203 bronze badges
answered Mar 27 '09 at 2:17
SvanteSvante...
HTML tag affecting line height, how to make it consistent?
...e font size further to make it fit:
sup { vertical-align: top; font-size: 0.6em; }
Another hack you could try is to use positioning to move it up a bit without affecting the line box:
sup { vertical-align: top; position: relative; top: -0.5em; }
Of course this runs the risk of crashing into th...
Making an iframe responsive
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108
I present to you The Incredible Singing Cat solution =)
.wrapper {
position: relative;
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Are HTTP cookies port specific?
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The current cookie specification is RFC 6265, which replaces RFC 2109 and RFC 2965 (both RFCs are now marked as "Historic") and formalizes the syntax for real-world usages of cookies. It clearly states:
Introduction
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For historical reasons, cookies contain a number of...