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A semantics for Bash scripts?
...e:
Positional parameters are not sparse. If $12 is set, you can be sure $11 is set, too. (It could be set to the empty string, but $# will not be smaller than 12.) If "${arr[12]}" is set, there's no guarantee that "${arr[11]}" is set, and the length of the array could be as small as 1.
The zeroth ...
How to sum up elements of a C++ vector?
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What is the difference between quiet NaN and signaling NaN?
...FPU. Whether the exception is thrown depends on the state of the FPU.
C++11 adds a few language controls over the floating-point environment and provides standardized ways to create and test for NaNs. However, whether the controls are implemented is not well standardized and floating-point except...
How can I scan barcodes on iOS?
... licence agreement ?
– Radu
Apr 21 '11 at 13:36
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How to jQuery clone() and change id?
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Community♦
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answered Apr 12 '12 at 15:09
Selvakumar ArumugamSelvakumar Arumugam
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Find column whose name contains a specific string
... {'spike-2': [1,2,3], 'hey spke': [4,5,6], 'spiked-in': [7,8,9], 'no': [10,11,12]}
df = pd.DataFrame(data)
spike_cols = [col for col in df.columns if 'spike' in col]
print(list(df.columns))
print(spike_cols)
Output:
['hey spke', 'no', 'spike-2', 'spiked-in']
['spike-2', 'spiked-in']
Explanatio...
Convert Int to String in Swift
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answered Jun 11 '14 at 11:08
ShaiShai
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Real life example, when to use OUTER / CROSS APPLY in SQL
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answered Feb 14 '12 at 11:12
Martin SmithMartin Smith
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NSAttributedString add text alignment
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Bo A
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answered Jul 23 '11 at 16:54
omzomz
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Multiple levels of 'collection.defaultdict' in Python
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StevenWernerCS
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answered Apr 8 '10 at 14:40
interjayinterjay
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