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How to detect my browser version and operating system using JavaScript?
...e = "Microsoft Internet Explorer";
fullVersion = nAgt.substring(verOffset+5);
}
// In Chrome, the true version is after "Chrome"
else if ((verOffset=nAgt.indexOf("Chrome"))!=-1) {
browserName = "Chrome";
fullVersion = nAgt.substring(verOffset+7);
}
// In Safari, the true version is after "Safari...
Find indices of elements equal to zero in a NumPy array
...numpy.where() is my favorite.
>>> x = numpy.array([1,0,2,0,3,0,4,5,6,7,8])
>>> numpy.where(x == 0)[0]
array([1, 3, 5])
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ReactJS: Modeling Bi-Directional Infinite Scrolling
...he image dimensions in your img tag: <img src="..." width="100" height="58" />. This way the browser doesn't have to wait to download it before knowing what size it is going to be displayed. This requires some infrastructure but it's really worth it.
If you can't know the size in advance, the...
git stash blunder: git stash pop and ended up with merge conflicts
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answered May 15 '10 at 16:56
tanasciustanascius
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What is data oriented design?
...nto an article.
– Erik Engheim
Apr 15 '14 at 14:11
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git merge: apply changes to code that moved to a different file
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edited Sep 22 at 18:54
Michael
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answered Fe...
What is the purpose of setting a key in data.table?
...r adhoc-by.
## "cold" by
require(data.table)
DT <- data.table(x=rep(1:5, each=2), y=1:10)
DT[, mean(y), by=x] # no key is set, order of groups preserved in result
However, prior to v1.9.6, joins of the form x[i] required key to be set on x. With the new on= argument from v1.9.6+, this is not ...
Clang optimization levels
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157
I found this related question.
To sum it up, to find out about compiler optimization passes:
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jQuery count child elements
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answered Nov 27 '10 at 10:25
Nick Craver♦Nick Craver
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How can I get nth element from a list?
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156
Look here, the operator used is !!.
I.e. [1,2,3]!!1 gives you 2, since lists are 0-indexed.
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