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Detect Chrome extension first run / update
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In newer versions of Chrome (since Chrome 22), you can use the chrome.runtime.onInstalled event, which is much cleaner.
Example:
// Check whether new version is installed
chrome.runtime.onInstalled.addListener(function(details){
if(details.reason == "install"){...
Why is whitespace sometimes needed around metacharacters?
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268
There is a list of characters that separate tokens in BASH. These characters are called metach...
Selecting the first “n” items with jQuery
...ed to select just the first "n" items from the page, for example the first 20 links instead of selecting all of them with the usual
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How do I set a cookie on HttpClient's HttpRequestMessage
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edited Jan 17 at 23:49
Todd Menier
30.2k1414 gold badges124124 silver badges146146 bronze badges
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Having links relative to root?
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298
A root-relative URL starts with a / character, to look something like <a href="/directoryIn...
Angular.js: How does $eval work and why is it different from vanilla eval?
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edited Aug 11 '14 at 19:23
answered Mar 27 '13 at 23:36
J...
Must qualify the allocation with an enclosing instance of type GeoLocation
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edited Dec 29 '12 at 15:09
knownasilya
5,26744 gold badges3030 silver badges5858 bronze badges
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Capistrano - clean up old releases
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Sharvy Ahmed
6,35811 gold badge2727 silver badges4242 bronze badges
answered Jan 23 '10 at 4:32
jcrossley3jcrossley3
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What's the fastest way to merge/join data.frames in R?
...s for duplicate keys. (continued after code)
DF1 = data.frame(a = c(1, 1, 2, 2), b = 1:4)
DF2 = data.frame(b = c(1, 2, 3, 3, 4), c = letters[1:5])
merge(DF1, DF2)
b a c
1 1 1 a
2 2 1 b
3 3 2 c
4 3 2 d
5 4 2 e
DF1$c = DF2$c[match(DF1$b, DF2$b)]
DF1$c
[1] a b c e
Levels: a b c d e
>...
What does `someObject.new` do in Java?
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120
It's the way to instantiate a non-static inner class from outside the containing class body, as...