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How to sort a dataframe by multiple column(s)
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Ari B. FriedmanAri B. Friedman
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How to compute the similarity between two text documents?
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<5x5 sparse matrix of type '<class 'numpy.float64'>'
with 17 stored elements in Compressed Sparse Row format>
You can convert the sparse array to a NumPy array via .toarray() or .A:
>>> pairwise_similarity.toarray() ...
Correct way to use StringBuilder in SQL
...have been 26 to start with, then doubled to 52, then 104, 208, 416, 832, 1664, 3328, and finally 6656). Only significant if this is a hotspot, but still, if you know in advance... :-)
– T.J. Crowder
Jan 4 '12 at 12:24
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Do HTML WebSockets maintain an open connection for each client? Does this scale?
...ction consists of destination ip & destination port. That means that ±64k ports limit is actually ONLY for a single client. Theoretically, the server can have any number of open connections, limited ONLY by its hardware.
– Rizon
Dec 21 '13 at 1:35
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Git ignore file for Xcode projects
...ource projects
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# Apple bugs, waiting for Apple to fix/respond:
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# 15564624 - what does the xccheckout file in Xcode5 do? Where's the documentation?
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# Version 2.6
# For latest version, see: http://stackoverflow.com/questions/49478/git-ignore-file-for-xcode-projects
#
# 2015 updates:
# - Fixed...
how to split the ng-repeat data with three columns using bootstrap
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64
This solution is very simple:
JSON:
[{id:"1",name:"testA"},{id:"2",name:"test B"},{id:"3",nam...
Autoincrement VersionCode with gradle extra properties
...n properties would need to look like this:
VERSION_NUMBER=1
VERSION_BUILD=645
VERSION_PATCH=1
Obviously start with 0. :)
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facebook: permanent Page Access Token?
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643
Following the instructions laid out in Facebook's extending page tokens documentation I was ab...
Are (non-void) self-closing tags valid in HTML5?
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64
In practice, using self-closing tags in HTML should work just like you'd expect. But if you are...
C# Sort and OrderBy comparison
...f they improved this in newer .NET versions, but on my machine (i7 3rd gen 64-bit .NET 4.5 release) Sort outperforms OrderBy in all cases. Furthermore, by looking at OrderedEnumerable<T> source code, it seems that it creates three additional arrays (first a Buffer<T>, then an array of pr...