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Why does [5,6,8,7][1,2] = 8 in JavaScript?
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Because (1,2) == 2. You've stumbled across the comma operator (or simpler explanation here).
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How do I byte-compile everything in my .emacs.d directory?
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edited Jan 13 '10 at 15:43
answered Aug 1 '09 at 19:07
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How to get a random number in Ruby
...get for that feature).
For instance, in this game where you need to guess 10 numbers, you can initialize them with:
10.times.map{ 20 + Random.rand(11) }
#=> [26, 26, 22, 20, 30, 26, 23, 23, 25, 22]
Note:
Using Random.new.rand(20..30) (using Random.new) generally would not be a good idea, ...
Double not (!!) operator in PHP
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answered Jan 24 '10 at 14:13
TheoTheo
122k1717 gold badges130130 silver badges172172 bronze badges
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std::back_inserter for a std::set?
... is faster
– marton78
Nov 14 '14 at 10:39
@marton78 But shouldn't it only be faster by a very small margin, if at all?...
Serializing a list to JSON
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edited Nov 18 '19 at 10:17
answered Feb 2 '12 at 10:46
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How to compile tests with SBT without running them
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answered Jan 30 '17 at 10:55
Brendan MaguireBrendan Maguire
2,87433 gold badges1818 silver badges2323 bronze badges
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Should I add .vcxproj.filter files to source control?
While evaluating Visual Studio 2010 Beta 2, I see that in the converted directory, my vcproj files became vcxproj files. There are also vcxproj.filter files alongside each project which appear to contain a description of the folder structure (\Source Files, \Header Files, etc.).
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Iterating over each line of ls -l output
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answered May 18 '10 at 18:50
Randy ProctorRandy Proctor
6,39011 gold badge2121 silver badges2626 bronze badges
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MYSQL Dump only certain rows
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For IN condition, we can simply use --where="id IN(1,2,6,10)". Where id is column in table. Ref --where
– Yogesh
Aug 26 '16 at 6:58
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