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What is “Argument-Dependent Lookup” (aka ADL, or “Koenig Lookup”)?
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grep a file, but show several surrounding lines?
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For BSD or GNU grep you can use -B num to set how many lines before the match and -A num for ...
Java regex email
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Gaurav Jeswani
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answered Nov 20 '11 at 21:04
Jason BuberelJason Bu...
Passing variable number of arguments around
... Servy
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answered Oct 15 '08 at 17:11
SmacLSmacL
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PHP 5: const vs static
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edited Mar 5 '18 at 14:30
ajmedway
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answered Nov 6 '09 at ...
PostgreSQL: Difference between text and varchar (character varying)
...tailed testing to show that the performance of inserts and selects for all 4 data types are similar. It also takes a detailed look at alternate ways on constraining the length when needed. Function based constraints or domains provide the advantage of instant increase of the length constraint, and o...
How to extract the n-th elements from a list of tuples?
... cs95
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answered Jul 22 '10 at 11:04
lucluc
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Is there a way to detect if an image is blurry?
...rovide such a metric. Convolve the image with a Laplacian kernel:
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1 -4 1
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And use a robust maximum metric on the output to get a number which you can use for thresholding. Try to avoid smoothing too much the images before computing the Laplacian, because you will only find out that a sm...
How to convert list of tuples to multiple lists?
...nction zip() will almost do what you want:
>>> zip(*[(1, 2), (3, 4), (5, 6)])
[(1, 3, 5), (2, 4, 6)]
The only difference is that you get tuples instead of lists. You can convert them to lists using
map(list, zip(*[(1, 2), (3, 4), (5, 6)]))
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