Comments (1)
https://gist.github.com/axelpale/3118596
k combinations
const k_combinations = (set, k) => {
if (k > set.length || k <= 0) {
return []
}
if (k == set.length) {
return [set]
}
if (k == 1) {
return set.reduce((acc, cur) => [...acc, [cur]], [])
}
let combs = [], tail_combs = []
for (let i = 0; i <= set.length - k + 1; i++) {
tail_combs = k_combinations(set.slice(i + 1), k - 1)
for (let j = 0; j < tail_combs.length; j++) {
combs.push([set[i], ...tail_combs[j]])
}
}
return combs
}
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