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What is PostgreSQL explain telling me exactly?
...'s explain output is pretty straightforward. PostgreSQL's is a little more complicated. I haven't been able to find a good resource that explains it either.
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Store query result in a variable using in PL/pgSQL
...le. Don't leave out the table name prefix on test_table.name or you'll get complaints about an ambiguous reference.
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Filtering a list based on a list of booleans
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You're looking for itertools.compress:
>>> from itertools import compress
>>> list_a = [1, 2, 4, 6]
>>> fil = [True, False, True, False]
>>> list(compress(list_a, fil))
[1, 4]
Timing comparisons(py3.x):
>>>...
What is pseudopolynomial time? How does it differ from polynomial time?
...me, we need to start off by formalizing what "polynomial time" means.
The common intuition for polynomial time is "time O(nk) for some k." For example, selection sort runs in time O(n2), which is polynomial time, while brute-force solving TSP takes time O(n · n!), which isn't polynomial time.
The...
How to color System.out.println output? [duplicate]
..., but there are third party API's that can handle it
http://www.javaworld.com/javaworld/javaqa/2002-12/02-qa-1220-console.html
Edit: of course there are newer articles than that one I posted, the information is still viable though.
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Fastest method of screen capturing on Windows
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How to suppress Update Links warning?
...s in his updated answer (shared for your convenience): https://www.dropbox.com/s/mv88vyc27eljqaq/Book1withLinkToBook2.xlsx Linked book was then deleted so that link in the shared book is unavailable (for sure).
Manual Opening
The above shared file shows on opening (having the above listed Excel op...
Timeout function if it takes too long to finish [duplicate]
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Nice. Also, it is recommended to decorate the function wrapper with @functools.wraps(func)
– shx2
Oct 31 '13 at 19:58
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Is there a performance difference between a for loop and a for-each loop?
...and the opportunity for error by
hiding the iterator or index variable
completely. The resulting idiom
applies equally to collections and
arrays:
// The preferred idiom for iterating over collections and arrays
for (Element e : elements) {
doSomething(e);
}
When you see the colon ...
How to specify font attributes for all elements on an html web page?
...ly" (unless of course it's a webfont) - Arial,helvetica,sans-serif is more compatible.
– rob74
Apr 15 '15 at 18:14
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