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Extract a number from a string (JavaScript)
... all leading non-digits with nothing
in the general case:
thenum = "foo3bar5".match(/\d+/)[0] // "3"
Since this answer gained popularity for some reason, here's a bonus: regex generator.
function getre(str, num) {
if(str === num) return 'nice try';
var res = [/^\D+/g,/\D+$/g,/^\D+|\...
Specifying rails version to use when creating a new application
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edited Sep 20 '11 at 16:23
Paweł Gościcki
7,05755 gold badges5555 silver badges7474 bronze badges
ans...
Splitting a string into chunks of a certain size
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36 Answers
36
Active
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Overflow:hidden dots at the end
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308
You can use text-overflow: ellipsis; which according to caniuse is supported by all the major ...
Find a pair of elements from an array whose sum equals a given number
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30 Answers
30
Active
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How is Python's List Implemented?
...al proof: Indexing takes (of course with extremely small differences (0.0013 µsecs!)) the same time regardless of index:
...>python -m timeit --setup="x = [None]*1000" "x[500]"
10000000 loops, best of 3: 0.0579 usec per loop
...>python -m timeit --setup="x = [None]*1000" "x[0]"
10000000 loo...
An efficient way to transpose a file in Bash
...,j];
}
print str
}
}' file
output
$ more file
0 1 2
3 4 5
6 7 8
9 10 11
$ ./shell.sh
0 3 6 9
1 4 7 10
2 5 8 11
Performance against Perl solution by Jonathan on a 10000 lines file
$ head -5 file
1 0 1 2
2 3 4 5
3 6 7 8
4 9 10 11
1 0 1 2
$ wc -l < file
10000
$ time per...
How to recognize swipe in all 4 directions
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324
You need to have one UISwipeGestureRecognizer for each direction. It's a little weird because ...
generate days from date range
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323
This solution uses no loops, procedures, or temp tables. The subquery generates dates for the ...
How can I iterate over an enum?
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edited Oct 4 '19 at 13:37
David Tóth
1,17788 silver badges2929 bronze badges
answered Nov 4 '08 at...