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Get item in the list in Scala?
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answered Feb 13 '11 at 0:59
Rex KerrRex Kerr
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Does Ruby regular expression have a not match operator like “!~” in Perl?
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156
Yes: !~ works just fine – you probably thought it wouldn’t because it’s missing from the ...
Truncate a list to a given number of elements
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Dave Jarvis
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answered Aug 14 '09 at 18:42
Ben LingsBen Lin...
How to get a pixel's x,y coordinate color from an image?
...taining the pixel's R, G, B, and A values. For alpha, anything less than 255 represents some level of transparency with 0 being fully transparent.
Here is a jsFiddle example: http://jsfiddle.net/thirtydot/9SEMf/869/ I used jQuery for convenience in all of this, but it is by no means required.
No...
Python - Create a list with initial capacity
...LottS.Lott
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19
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space between divs - display table-cell
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5 Answers
5
Active
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Random row selection in Pandas dataframe
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58
Something like this?
import random
def some(x, n):
return x.ix[random.sample(x.index, n)]...
How to round to 2 decimals with Python?
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Boris
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answered Dec 8 '13 at 18:20
roliszrolisz
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How to create the most compact mapping n → isprime(n) up to a limit N?
...= 0:
return False
if n % 3 == 0:
return False
i = 5
w = 2
while i * i <= n:
if n % i == 0:
return False
i += w
w = 6 - w
return True
It's a variant of the classic O(sqrt(N)) algorithm. It uses the fact that a prime (exc...