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str performance in python
...tly) faster than str:
>>> Timer('str(x)', 'x=100').timeit()
0.25641703605651855
>>> Timer('"%s" % x', 'x=100').timeit()
0.2169809341430664
Do note that str is still slightly slower, as @DietrichEpp said, this is because str involves lookup and function call operations, while % c...
CSS 3 slide-in from left transition
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edited Feb 14 '14 at 8:27
answered Jun 8 '13 at 8:28
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Which regular expression operator means 'Don't' match this character?
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4 Answers
4
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Creating a zero-filled pandas data frame
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140
You can try this:
d = pd.DataFrame(0, index=np.arange(len(data)), columns=feature_list)
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Numpy how to iterate over columns of array?
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49
For those wondering, array.T isn't costly, as it just changes the 'strides' of array (see this answer for an interesting discussion)
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Which is better, number(x) or parseFloat(x)?
...x10'; // => 16
Number('10x'); // => NaN
+'10x'; // => NaN
Number('40'); // => 40
+'40'; // => 40
So I usually just use + for short. As long as you know what it does, I find it easy to read.
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how to override left:0 using CSS or Jquery?
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Jan HančičJan Hančič
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If vs. Switch Speed
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answered Jan 14 '09 at 23:16
Konrad RudolphKonrad Rudolph
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How to base64 encode image in linux bash / shell
I'm trying to base64 encode an image in a shell script and put it into variable:
6 Answers
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Bash: If/Else statement in one line
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William PursellWilliam Pursell
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