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numpy: most efficient frequency counts for unique values in an array
...x = np.array([1,1,1,2,2,2,5,25,1,1])
y = np.bincount(x)
ii = np.nonzero(y)[0]
And then:
zip(ii,y[ii])
# [(1, 5), (2, 3), (5, 1), (25, 1)]
or:
np.vstack((ii,y[ii])).T
# array([[ 1, 5],
[ 2, 3],
[ 5, 1],
[25, 1]])
or however you want to combine the counts and th...
How to unpack and pack pkg file?
...a file but I dont know how pack again to pkg.
http://emresaglam.com/blog/1035
http://ilostmynotes.blogspot.com/2012/06/mac-os-x-pkg-bom-files-package.html
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What is ApplicationException for in .NET?
...
103
According to the remarks in msdn:
User applications, not the common language runtime, throw cu...
Converting A String To Hexadecimal In Java
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200
Here's a short way to convert it to hex:
public String toHex(String arg) {
return String.f...
How can I get file extensions with JavaScript?
...egex twice?
– Andrew Hedges
Oct 11 '08 at 7:39
6
The highly-rated answer below is much better.
...
Useful code which uses reduce()? [closed]
...in(map(str, [1,2,3,4,5,6,7,8])))
Pretty reduce way:
reduce(lambda a,d: 10*a+d, [1,2,3,4,5,6,7,8], 0)
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Git - deleted some files locally, how do I get them from a remote repository
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answered Nov 20 '10 at 23:20
CascabelCascabel
398k6464 gold badges352352 silver badges307307 bronze badges
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How to update a pull request from forked repo?
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answered Mar 20 '12 at 16:09
shelhamershelhamer
24.3k22 gold badges2626 silver badges3232 bronze badges
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RSA Public Key format
...-v -- ----- | tr -d '\n' | base64 -d | openssl asn1parse -inform DER:
0:d=0 hl=4 l= 266 cons: SEQUENCE
4:d=1 hl=4 l= 257 prim: INTEGER :FB1199FF0733F6E805A4FD3B36CA68E94D7B974621162169C71538A539372E27F3F51DF3B08B2E111C2D6BBF9F5887F13A8DB4F1EB6DFE386C92256875212DDD00468...
sqlalchemy: how to join several tables by one query?
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answered May 18 '11 at 13:04
Abdul KaderAbdul Kader
5,09733 gold badges1919 silver badges3737 bronze badges
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