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Set value for particular cell in pandas DataFrame using index
...y df.
In [18]: %timeit df.set_value('C', 'x', 10)
100000 loops, best of 3: 2.9 µs per loop
In [20]: %timeit df['x']['C'] = 10
100000 loops, best of 3: 6.31 µs per loop
In [81]: %timeit df.at['C', 'x'] = 10
100000 loops, best of 3: 9.2 µs per loop
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Is std::vector so much slower than plain arrays?
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Using the following:
g++ -O3 Time.cpp -I <MyBoost>
./a.out
UseArray completed in 2.196 seconds
UseVector completed in 4.412 seconds
UseVectorPushBack completed in 8.017 seconds
The whole thing completed in 14.626 seconds
So array is...
Forced naming of parameters in Python
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223
In Python 3 - Yes, you can specify * in the argument list.
From docs:
Parameters after “*...
Design for Facebook authentication in an iOS app that also accesses a secured web service
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n00bProgrammer
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answered Jan 7 '11 at 13:40
Dan RayDan Ray
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How to detect the currently pressed key?
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163
if ((Control.ModifierKeys & Keys.Shift) != 0)
This will also be true if Ctrl+Shift is dow...
Correct way to find max in an Array in Swift
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302
Given:
let numbers = [1, 2, 3, 4, 5]
Swift 3:
numbers.min() // equals 1
numbers.max() // e...
Move an item inside a list?
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answered Jul 3 '10 at 23:15
David ZDavid Z
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Rails 3 check if attribute changed
Need to check if a block of attributes has changed before update in Rails 3.
5 Answers
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reference assignment is atomic so why is Interlocked.Exchange(ref Object, Object) needed?
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answered Feb 3 '10 at 16:20
Eric LippertEric Lippert
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