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Weighted random numbers
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1) calculate the sum of all the weights
2) pick a random number that is 0 or greater and is less than the sum of the weights
3) go through the items one at a time, subtracting their weight from your random number, until you get the item where the random number is less than that item's weight
Ps...
Angularjs if-then-else construction in expression
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Rafael Almeida
8,10666 gold badges3939 silver badges5757 bronze badges
answered May 16 '13 at 11:16
Andre GoncalvesAndr...
Fastest way to duplicate an array in JavaScript - slice vs. 'for' loop
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790
There are at least 6 (!) ways to clone an array:
loop
slice
Array.from()
concat
spread operator...
Why do we need argc while there is always a null at the end of argv?
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106
Yes, argv[argc]==NULL is guaranteed. See C11 5.1.2.2.1 Program startup (my emphasis)
If th...
Calculate last day of month in JavaScript
If you provide 0 as the dayValue in Date.setFullYear you get the last day of the previous month:
20 Answers
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How to use a variable for the key part of a map
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– Michal Bernhard
Mar 2 '16 at 13:10
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Postgresql SELECT if string contains
... Frans van BuulFrans van Buul
1,65911 gold badge1010 silver badges66 bronze badges
5
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What is the rationale for all comparisons returning false for IEEE754 NaN values?
...s a similar property that does hold. Clause 5.11, paragraph 2 of the 754-2008 standard:
Four mutually exclusive relations are possible: less than, equal, greater than, and unordered. The last case arises when at least one operand is NaN. Every NaN shall compare unordered with everything, includ...
Django connection to PostgreSQL: “Peer authentication failed”
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edited Sep 18 '17 at 11:05
answered Nov 22 '11 at 18:39
T...
Rebasing a branch including all its children
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40
git branch --contains C | \
xargs -n 1 \
git rebase --committer-date-is-author-date --preserve-m...