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How to calculate the number of occurrence of a given character in each row of a column of strings?
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Quickly reading very large tables as dataframes
I have very large tables (30 million rows) that I would like to load as a dataframes in R. read.table() has a lot of convenient features, but it seems like there is a lot of logic in the implementation that would slow things down. In my case, I am assuming I know the types of the columns ahead o...
What are “named tuples” in Python?
Reading the changes in Python 3.1 , I found something... unexpected:
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Command copy exited with code 4 when building - Visual Studio restart solves it
... has stopped my builds from failing.
Another solution which only works on 32 bit is to use the unlocker tool to release the windows handles on the file before the copy.
Edit: I've just realised that it works under 64 bits too.
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Xcode Simulator: how to remove older unneeded devices?
I'm running Xcode 4.3.1 iOS-Simulator which originally only supports iOS 5.1.
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How to append contents of multiple files into one file
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317
You need the cat (short for concatenate) command, with shell redirection (>) into your outp...
Preferred method to store PHP arrays (json_encode vs serialize)
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"JSON converts UTF-8 characters to unicode escape sequences." No longer necessarily true: we now have JSON_UNESCAPED_UNICODE.
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Remove array element based on object property
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answered Mar 8 '13 at 6:19
jAndyjAndy
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RESTful URL design for search
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edited Feb 14 '13 at 13:06
Gaz_Edge
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Generate 'n' unique random numbers within a range [duplicate]
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396
If you just need sampling without replacement:
>>> import random
>>> random...