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How to properly compare two Integers in Java?
...n(x == y);
This will print true, due to the rules of boxing (JLS section 5.1.7). It's still reference equality being used, but the references genuinely are equal.
If the value p being boxed is an integer literal of type int between
-128 and 127 inclusive (§3.10.1), or the boolean literal tr...
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
...
answered May 15 '10 at 16:56
tanasciustanascius
48.8k1515 gold badges105105 silver badges129129 bronze badges
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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:
...