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Unable to install gem - Failed to build gem native extension - cannot load such file — mkmf (LoadErr
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edited Sep 29 '17 at 13:05
answered Dec 7 '12 at 17:13
MrY...
Uncaught TypeError: Cannot read property 'msie' of undefined - jQuery tools
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answered Feb 17 '13 at 16:50
AlexanderAlexander
21.9k1010 gold badges5353 silver badges7373 bronze badges
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How do you convert a JavaScript date to UTC?
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edited Aug 13 '18 at 12:35
user1063287
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answ...
How to bring back “Browser mode” in IE11?
...t emulate conditional comments. For example, if you use them to enable HTML5 support in legacy IEs, you will no longer be able to debug your site in IE11.
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Finding the average of a list
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On Python 3.4+ you can use statistics.mean()
l = [15, 18, 2, 36, 12, 78, 5, 6, 9]
import statistics
statistics.mean(l) # 20.11111111111111
On older versions of Python you can do
sum(l) / len(l)
On Python 2 you need to convert len to a float to get float division
sum(l...
Why use the 'ref' keyword when passing an object?
...nged after the method returns:
int x = 1;
Change(ref x);
Debug.Assert(x == 5);
WillNotChange(x);
Debug.Assert(x == 5); // Note: x doesn't become 10
void Change(ref int x)
{
x = 5;
}
void WillNotChange(int x)
{
x = 10;
}
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“document.getElementByClass is not a function”
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252
You probably meant document.getElementsByClassName() (and then grabbing the first item off the ...
Check if character is number?
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GregLGregL
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1
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android splash screen sizes for ldpi,mdpi, hdpi, xhdpi displays ? - eg : 1024X768 pixels for ldpi
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edited Apr 15 '16 at 0:20
answered Nov 21 '12 at 5:54
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PHP Sort Array By SubArray Value
...ptionNumber"];
}
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usort($array, "cmp_by_optionNumber");
In PHP ≥5.3, you should use an anonymous function instead:
usort($array, function ($a, $b) {
return $a['optionNumber'] - $b['optionNumber'];
});
Note that both code above assume $a['optionNumber'] is an integer. Use @St. John ...