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Looping over arrays, printing both index and value
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edited Feb 22 '19 at 20:38
Community♦
111 silver badge
answered Jul 17 '11 at 11:26
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Double not (!!) operator in PHP
...rrays, etc.) you will get the boolean value TRUE, and for any false value (0, 0.0, NULL, empty strings or empty arrays) you will get the boolean value FALSE.
It is functionally equivalent to a cast to boolean:
return (bool)$row;
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using gitignore to ignore (but not delete) files
... will never mark it as changed. Read more at:
http://blog.pagebakers.nl/2009/01/29/git-ignoring-changes-in-tracked-files/ - was reported dead at some time (sorry, not mine)
http://archive.robwilkerson.org/2010/03/02/git-tip-ignore-changes-to-tracked-files/ - another one covering the same topic
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Python - write() versus writelines() and concatenated strings
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150
writelines expects an iterable of strings
write expects a single string.
line1 + "\n" + line...
MongoDB with redis
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Didier SpeziaDidier Spezia
60.6k1010 gold badges156156 silver badges139139 bronze badges
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How to make a great R reproducible example
...sed for making factors.
A few examples :
random values : x <- rnorm(10) for normal distribution, x <- runif(10) for uniform distribution, ...
a permutation of some values : x <- sample(1:10) for vector 1:10 in random order.
a random factor : x <- sample(letters[1:4], 20, replace = TRU...
Histogram Matplotlib
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240
import matplotlib.pyplot as plt
import numpy as np
mu, sigma = 100, 15
x = mu + sigma * np.rand...
What is the purpose of AsQueryable()?
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ServyServy
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font-style: italic vs oblique in CSS
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edited May 22 '14 at 15:10
BoltClock♦
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Why JSF saves the state of UI components on server?
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201
Why does JSF need to save the state of UI components on the server side ?
Because HTTP is sta...