Created
December 15, 2014 12:44
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combination-js
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| n_combination: (sets, n) -> | |
| if sets.length < n or n <= 0 | |
| return [] | |
| if sets.length == n | |
| return [sets] | |
| if n == 1 | |
| return (c for c in sets) | |
| combs = [] | |
| for i in [0...sets.length - n + 1] | |
| head = sets.slice(i, i + 1); | |
| tailcombs = n_combination(sets.slice(i+1), n - 1) | |
| for j in [0...tailcombs.length] | |
| combs.push(head.concat(tailcombs[j])) | |
| return combs |
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