大约有 46,000 项符合查询结果（耗时：0.0473秒） [XML]
Checking if output of a command contains a certain string in a shell script
...lperreal
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ActiveRecord: size vs count
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Jo Liss
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answered May 21 '11 at 17:10
apneadivingapneadiving
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Check if key exists and iterate the JSON array using Python
...inspectorG4dgetinspectorG4dget
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is_file or file_exists in PHP
...o 10k. The result is:
when the file exists:
is_file x 10000 1.5651218891144 seconds
file_exists x 10000 1.5016479492188 seconds
is_readable x 10000 3.7882499694824 seconds
when the file does not exist:
is_file x 10000 0.23920488357544 seconds
file_exists x 10000 0.22103786468506 seconds ...
How can I check if a key is pressed during the click event with jQuery?
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edited May 23 '17 at 11:54
Community♦
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answered Mar 15 '10 at 7:33
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Why does `a == b or c or d` always evaluate to True?
... C, Python evaluates the logical value of a non zero integer as True.
In [11]: if 3:
...: print ("yey")
...:
yey
Now, Python builds on that logic and let you use logic literals such as or on integers, and so
In [9]: False or 3
Out[9]: 3
Finally
In [4]: a==b or c or d
Out[4]: 3
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python's re: return True if string contains regex pattern
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radtek
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answered Jan 25 '12 at 23:39
mattbornskimattbornski
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How can I efficiently select a Standard Library container in C++11?
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answered May 22 '12 at 11:26
Matthieu M.Matthieu M.
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When do you need to explicitly call a superclass constructor?
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edited Jun 11 '11 at 21:34
answered Jun 11 '11 at 21:25
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`elif` in list comprehension conditionals
...-AbramsIgnacio Vazquez-Abrams
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