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Bootstrap carousel multiple frames at once
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14 Answers
14
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Java String - See if a string contains only numbers and not letters
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17 Answers
17
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ValueError: math domain error
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134
Your code is doing a log of a number that is less than or equal to zero. That's mathematically...
Best way of returning a random boolean value
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edited Aug 23 '15 at 7:45
answered Nov 4 '11 at 16:43
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Pandas dataframe get first row of each group
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>>> df.groupby('id').first()
value
id
1 first
2 first
3 first
4 second
5 first
6 first
7 fourth
If you need id as column:
>>> df.groupby('id').first().reset_index()
id value
0 1 first
1 2 first
2 3 first
3 4 seco...
C# 5 async CTP: why is internal “state” set to 0 in generated code before EndAwait call?
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71
Okay, I finally have a real answer. I sort of worked it out on my own, but only after Lucian Wis...
What does the constant 0.0039215689 represent?
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0.0039215689 is approximately equal to 1/255.
Seeing that this is OpenGL, performance is probably important. So it's probably safe to guess that this was done for performance reasons.
Multiplying by the reciprocal is faster than r...
Javascript seconds to minutes and seconds
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function str_pad_left(string,pad,length) {
return (new Array(length+1).join(pad)+string).slice(-length);
}
var finalTime = str_pad_left(minutes,'0',2)+':'+str_pad_left(seconds,'0',2);
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