月: 2018年12月

1. (function() {
2. var base = [1,2,3,4,5];
3. var num = 2;
5. var combi = get_combi(base, num);
6. console.log(combi);
7. })();
9. function get_combi(base, num, ary = [], idx = 0) {
10. var result = [];
11. for (var i = idx; i <= base.length - num; i++) {
12. var newary = ary.concat(base[i]);
13. if (num > 1) {
14. var r = get_combi(base, num-1, newary, i+1);
15. Array.prototype.push.apply(result, r);
16. } else {
17. result.push(newary);
18. }
19. }
20. return result;
21. }

(function() {
  var base = [1,2,3,4,5];
  var num = 2;

  var combi = get_combi(base, num);
  console.log(combi);
})();

function get_combi(base, num, ary = [], idx = 0) {
  var result = [];
  for (var i = idx; i <= base.length - num; i++) {
    var newary = ary.concat(base[i]);
    if (num > 1) {
      var r = get_combi(base, num-1, newary, i+1);
      Array.prototype.push.apply(result, r);
    } else {
      result.push(newary);
    }
  }
  return result;
}