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How to invert a grep expression
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344
Use command-line option -v or --invert-match,
ls -R |grep -v -E .*[\.exe]$\|.*[\.html]$
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How do I query using fields inside the new PostgreSQL JSON datatype?
...e performance:
Index for finding an element in a JSON array
Postgres 9.4
Adds jsonb (b for "binary", values are stored as native Postgres types) and yet more functionality for both types. In addition to expression indexes mentioned above, jsonb also supports GIN, btree and hash indexes, GIN bei...
#ifdef in C#
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edited Dec 30 '14 at 9:52
answered Jun 10 '09 at 12:52
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C++ convert vector to vector
...s McNellis
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What are all the possible values for HTTP “Content-Type” header?
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4 Answers
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From ND to 1D arrays
...or np.ndarray.flat (for an 1D iterator):
In [12]: a = np.array([[1,2,3], [4,5,6]])
In [13]: b = a.ravel()
In [14]: b
Out[14]: array([1, 2, 3, 4, 5, 6])
Note that ravel() returns a view of a when possible. So modifying b also modifies a. ravel() returns a view when the 1D elements are contiguous...
What's the point of 'meta viewport user-scalable=no' in the Google Maps API
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4 Answers
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redis-py : What's the difference between StrictRedis() and Redis()?
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143
This seems pretty clear:
redis-py exposes two client classes that implement these commands
Th...
How to call function from another file in go language?
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4 Answers
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