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Check if database exists in PostgreSQL using shell
...s
(4 rows)
Using the naive approach means that searching for a database called "List, "Access" or "rows" will succeed. So we pipe this output through a bunch of built-in command line tools to only search in the first column.
The -t flag removes headers and footers:
my_db | my_user | UTF...
Is it possible to make abstract classes in Python?
...nitions of those methods:
>>> Abstract()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: Can't instantiate abstract class Abstract with abstract methods foo
>>> class StillAbstract(Abstract):
... pass
...
>>> StillAbstr...
Dynamically set local variable [duplicate]
How do you dynamically set local variable in Python (where the variable name is dynamic)?
7 Answers
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Read a variable in bash with a default value
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This doesn't actually answer the question. The default value should be displayed in the prompt.
– Dr. Person Person II
Oct 26 '11 at 0:47
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Efficient way to return a std::vector in c++
...urn value (by value) is: instead of 'been moved', the return value in the callee is created on the caller's stack, so all operations in the callee are in-place, there is nothing to move in RVO. Is that correct?
– r0ng
Sep 5 '18 at 5:59
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What is the use of Enumerable.Zip extension method in Linq?
What is the use of Enumerable.Zip extension method in Linq?
9 Answers
9
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Delete column from SQLite table
...the columns, whereas something like the accepted answer seems to result in all columns to be of type TEXT.
– Uwe Keim
Jul 10 '17 at 15:05
2
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How to crop an image in OpenCV using Python
...copy region of interest
If we consider (0,0) as top left corner of image called im with left-to-right as x direction and top-to-bottom as y direction. and we have (x1,y1) as the top-left vertex and (x2,y2) as the bottom-right vertex of a rectangle region within that image, then:
roi = im[y1:y2, x1...
Can git operate in “silent mode”?
...ng the new branch has been setup. Is there someway (some flag) using which all such output can be silenced ?
– Ankur
Jan 6 '15 at 8:57
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