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How can I return pivot table output in MySQL?
...ivot-Tables-with-MySQL
http://datacharmer.org/downloads/pivot_tables_mysql_5.pdf
https://codingsight.com/pivot-tables-in-mysql/
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How to instantiate a File object in JavaScript?
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answered Oct 3 '14 at 14:51
AlainDAlainD
5,28433 gold badges1313 silver badges2929 bronze badges
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Maintain aspect ratio of div but fill screen width and height in CSS?
... and without scrollbars!
(PURE) CSS
div
{
width: 100vw;
height: 56.25vw; /* height:width ratio = 9/16 = .5625 */
background: pink;
max-height: 100vh;
max-width: 177.78vh; /* 16/9 = 1.778 */
margin: auto;
position: absolute;
top:0;bottom:0; /* vertical center */
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How does C compute sin() and other math functions?
...ently faster than the fsin assembly instruction. Source code: sysdeps/ieee754/dbl-64/s_sin.c, look for __sin (double x).
This code is very complex. No one software algorithm is as fast as possible and also accurate over the whole range of x values, so the library implements several different algori...
Dump a NumPy array into a csv file
...ves an array to a text file.
import numpy
a = numpy.asarray([ [1,2,3], [4,5,6], [7,8,9] ])
numpy.savetxt("foo.csv", a, delimiter=",")
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ExecJS::RuntimeError on Windows trying to follow rubytutorial
...results: https://github.com/sstephenson/execjs/issues/81#issuecomment-9892952
If this did not fix the issue, you can always overwrite the modified runtimes.rb with the backup copy you (hopefully) made and everything will be back to square one. In that case, consider option 3 and keep searching. Le...
Using HTML5/Canvas/JavaScript to take in-browser screenshots
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What is cardinality in MySQL?
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answered Apr 2 '10 at 10:55
Alexander TorstlingAlexander Torstling
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Dynamically creating keys in a JavaScript associative array
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tvanfossontvanfosson
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Iterate over the lines of a string
...python -mtimeit -s'import asp' 'list(asp.f1())'
10000 loops, best of 3: 61.5 usec per loop
Note we need the list() call to ensure the iterators are traversed, not just built.
IOW, the naive implementation is so much faster it isn't even funny: 6 times faster than my attempt with find calls, which...