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Extract a regular expression match
...(stringr)
str_locate("aaa12xxx", "[0-9]+")
# start end
# [1,] 4 5
str_extract("aaa12xxx", "[0-9]+")
# [1] "12"
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What is the best java image processing library/approach? [closed]
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answered Mar 5 '09 at 23:58
IvanIvan
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How can I check for “undefined” in JavaScript? [duplicate]
...defined // true
As @CMS pointed out, this has been patched in ECMAScript 5th ed., and undefined is non-writable.
if (window.myVar) will also include these falsy values, so it's not very robust:
false
0
""
NaN
null
undefined
Thanks to @CMS for pointing out that your third case - if (myVariable...
How to use Boost in Visual Studio 2010
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512
While Nate's answer is pretty good already, I'm going to expand on it more specifically for Vi...
Get the closest number out of an array
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ES5 Version:
var counts = [4, 9, 15, 6, 2],
goal = 5;
var closest = counts.reduce(function(prev, curr) {
return (Math.abs(curr - goal) < Math.abs(prev - goal) ? curr : prev);
});
console.log(closest);
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DisplayName attribute from Resources?
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Jason
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answered Mar 12 '10 at 12:05
Darin DimitrovDarin D...
HTML Input=“file” Accept Attribute File Type (CSV)
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edited Mar 30 '16 at 5:15
Rikin Patel
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answe...
prevent refresh of page when button inside form clicked
... getData.
– Quentin
Oct 18 '11 at 8:51
1
That's what I ment, but okay, modified the answer so it'...
ASP.NET MVC on IIS 7.5
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edited Sep 5 '11 at 6:20
answered Mar 4 '10 at 2:20
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How can I set NODE_ENV=production on Windows?
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506
Current versions of Windows use Powershell as the default shell, so use:
$env:NODE_ENV="produ...