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Omit rows containing specific column of NA
...dy? Take all columns that do not have NAs at all.
– Léo Léopold Hertz 준영
Jul 18 '17 at 15:33
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Resolve absolute path from relative path and/or file name
...ou need to support both relative and absolute paths, you can make use of Frédéric Ménez's solution: temporarily change the current working directory.
Here's an example that'll demonstrate each of these techniques:
@echo off
echo %%~dp0 is "%~dp0"
echo %%0 is "%0"
echo %%~dpnx0 is "%~dpnx0"
ech...
How to create circle with Bézier curves?
... a circle radius. There also exists an engine that can create a path from Bézier curve points.
10 Answers
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How to get a random number in Ruby
...ust need a random float, just call rand with no arguments.
As Marc-André Lafortune mentions in his answer below (go upvote it), Ruby 1.9.2 has its own Random class (that Marc-André himself helped to debug, hence the 1.9.2 target for that feature).
For instance, in this game where you need to ...
Request is not available in this context
... answered Apr 4 '14 at 9:17
FrédéricFrédéric
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Why does !{}[true] evaluate to true in JavaScript?
... answered Oct 31 '13 at 9:43
Frédéric HamidiFrédéric Hamidi
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Last segment of URL in jquery
... answered Jan 21 '11 at 11:18
Frédéric HamidiFrédéric Hamidi
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How do I get the n-th level parent of an element in jQuery?
... answered Aug 17 '11 at 13:37
Frédéric HamidiFrédéric Hamidi
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Easy interview question got harder: given numbers 1..100, find the missing number(s) given exactly k
...omial (x-a1)...(x-ak) the coefficients will be exactly c1, ..., ck - see Viète's formulas. Since every polynomial factors uniquely (ring of polynomials is an Euclidean domain), this means ai are uniquely determined, up to permutation.
This ends a proof that remembering powers is enough to recover ...
JQuery .on() method with multiple event handlers to one selector
... answered Dec 22 '11 at 18:18
Frédéric HamidiFrédéric Hamidi
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