Last active
December 31, 2015 20:09
-
-
Save jakobmattsson/8038195 to your computer and use it in GitHub Desktop.
Combinations - kodapor
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| flatten = (arrays) -> | |
| result = [] | |
| arrays.forEach (array) -> | |
| result = result.concat(array) | |
| result | |
| combinations = (n, values) -> | |
| return [[]] if n <= 0 | |
| flatten [0 ... values.length].map (x) -> | |
| head = values[x] | |
| rest = values.slice(x+1) | |
| subCombinations = combinations(n-1, rest) | |
| subCombinations.map (subCombination) -> [head].concat(subCombination) | |
| allCombinations = (n, values) -> | |
| flatten [1 .. n].map (newN) -> | |
| combinations(newN, values) | |
| console.log allCombinations(4, [5, 4, 3, 2, 1]) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment