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Select Row number in postgres
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You should also specify an order in OVER clause: OVER (ORDER BY id). Otherwise the order is not guaranteed.
– AlexM
Jun 14 '16 at 4:30
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Windows batch files: .bat vs .cmd?
...ution: FOR /F (existed before, has been enhanced)
Functions: CALL :label
Order of Execution:
If both .bat and .cmd versions of a script (test.bat, test.cmd) are in the same folder and you run the script without the extension (test), by default the .bat version of the script will run, even on 64-b...
What is Linux’s native GUI API?
...ystem will also have an entire "stack" of other software running on it, in order to provide a graphical user interface and other features. Each element of this stack will offer its own API.
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Algorithm to generate all possible permutations of a list?
Say I have a list of n elements, I know there are n! possible ways to order these elements. What is an algorithm to generate all possible orderings of this list? Example, I have list [a, b, c]. The algorithm would return [[a, b, c], [a, c, b,], [b, a, c], [b, c, a], [c, a, b], [c, b, a]].
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Accessing dict_keys element by index in Python3
...rted(dict) would do the exact same thing; produce a list of keys in sorted order. list(dict) will give you the list in dictionary order.
– Martijn Pieters♦
May 9 '18 at 16:11
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CMake: How to build external projects and include their targets
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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if/else in a list comprehension
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You can totally do that. It's just an ordering issue:
[unicode(x.strip()) if x is not None else '' for x in row]
In general,
[f(x) if condition else g(x) for x in sequence]
And, for list comprehensions with if conditions only,
[f(x) for x in sequence if co...
java SSL and cert keystore
...n searches for
and uses a keystore file in the
following locations (in order):
$JAVA_HOME/lib/security/jssecacerts
$JAVA_HOME/lib/security/cacerts
javax.net.ssl.trustStorePassword -
Password to unlock the keystore file
(store password) specified by
javax.net.ssl.trustSt...
Java Regex Capturing Groups
...d since it's any character, it'll match as many characters as there are in order to fulfill the condition for the next groups).
In short, your 1st group .* matches anything as long as the next group \\d+ can match something (in this case, the last digit).
As per the 3rd group, it will match anyt...
Compare two files line by line and generate the difference in another file
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What does "sorted" mean? That the lines have the same order? Then it's probably fine for most use cases - as in, checking for what lines have been added by comparing with a backed-up older version. If newly added lines cannot be between the existing lines, that's more of an issu...