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Convert seconds to Hour:Minute:Second
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answered Jul 3 '10 at 18:03
animuson♦animuson
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Disable assertions in Python
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Michael CurrieMichael Currie
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add a...
Is it possible to specify your own distance function using scikit-learn K-Means Clustering?
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def kmeans( X, centres, delta=.001, maxiter=10, metric="euclidean", p=2, verbose=1 ):
""" centres, Xtocentre, distances = kmeans( X, initial centres ... )
in:
X N x dim may be sparse
centres k x dim: initial centres, e.g. random.sample( X, k )
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What is the documents directory (NSDocumentDirectory)?
...ibrary/CoreServices)
NSAutosavedInformationDirectory NS_ENUM_AVAILABLE(10_6, 4_0) = 11, // location of autosaved documents (Documents/Autosaved)
NSDesktopDirectory = 12, // location of user's desktop
NSCachesDirectory = 13, // location of discardable cach...
Carriage Return/Line Feed in .Net Resource File (App_GlobalResources)
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bluish
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answered May 31 '09 at 6:49
shahkalpeshshahkalpesh
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Git Cherry-pick vs Merge Workflow
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edited May 23 '17 at 10:31
Community♦
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answered Aug 6 '09 at 22:14
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Show MySQL host via SQL Command
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ajrealajreal
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What's the difference between “groups” and “captures” in .NET regular expressions?
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answered Jul 23 '10 at 17:41
AbelAbel
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How to detect duplicate values in PHP array?
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What is the purpose of setting a key in data.table?
... "cold" by
require(data.table)
DT <- data.table(x=rep(1:5, each=2), y=1:10)
DT[, mean(y), by=x] # no key is set, order of groups preserved in result
However, prior to v1.9.6, joins of the form x[i] required key to be set on x. With the new on= argument from v1.9.6+, this is not true anymore, an...