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How to calculate date difference in JavaScript?

... milliseconds to years. You must be aware of bissextile year, of timezone, and some days have 23 or 25 hours. Some years have 365,25 days, so there is no simple arithmetic here (still looking for an accurate solution). – Alexandre Salomé May 20 '14 at 12:50 ...
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Converting a Uniform Distribution to a Normal Distribution

How can I convert a uniform distribution (as most random number generators produce, e.g. between 0.0 and 1.0) into a normal distribution? What if I want a mean and standard deviation of my choosing? ...
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What does |= (ior) do in Python?

.... See examples below. Sets For example, the union of two assigned sets s1 and s2 share the following equivalent expressions: >>> s1 = s1 | s12 # 1 >>> s1 |= s2 # 2 >>> s1.__ior__(s2) ...
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Easy interview question got harder: given numbers 1..100, find the missing number(s) given exactly k

... Here's a summary of Dimitris Andreou's link. Remember sum of i-th powers, where i=1,2,..,k. This reduces the problem to solving the system of equations a1 + a2 + ... + ak = b1 a12 + a22 + ... + ak2 = b2 ... a1k + a2k + ... + akk = bk Using Newton's...
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Convert light frequency to RGB?

... And the Fourmilab article makes the important point that some colours are not representable in RGB (bright oranges being a good example) because you cannot "make" arbitrary colours of light by adding three primary colours tog...
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How to change Android version and code version number?

How to change Android version and code version number Android Studio? I want to change apk file (app) on Google Play and I need to change Android version and code version number. I tried with this in AndroidManifest.xml file in Android Studio: ...
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Count work days between two dates

... @greektreat It works fine. It's just that both @StartDate and @EndDate are included in the count. If you want Monday to Tuesday to count as 1 day, just remove the "+ 1" after the first DATEDIFF. Then you'll also get Fri->Sat=0, Fri->Sun=0, Fri->Mon=1. –...
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~x + ~y == ~(x + y) is always false?

... Assume for the sake of contradiction that there exists some x and some y (mod 2n) such that ~(x+y) == ~x + ~y By two's complement*, we know that, -x == ~x + 1 <==> -1 == ~x + x Noting this result, we have, ~(x+y) == ~x + ~y <==> ~(x+y) + (x+y) == ~x + ~y...
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Optimal way to concatenate/aggregate strings

...on to facilitate this would be nice. I've tried solutions using COALESCE and FOR XML , but they just don't cut it for me. ...
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Move entire line up and down in Vim

...++, I can use Ctrl + Shift + Up / Down to move the current line up and down. Is there a similar command to this in Vim? I have looked through endless guides, but have found nothing. ...