jvascript array 경우의 수 구하기 (permute)

var permute_list = [];

function permute(_arr, _temp)
{
    if (_temp.length === _arr.length)
    {
        permute_list.push(_temp.slice());
        return;
    }

    _arr.forEach(num => {
        if (!_temp.includes(num))
        {
            _temp.push(num);
            permute(_arr, _temp);
            _temp.pop();
        }
    });
}

permute([0, 1, 2], []); 

console.log(permute_list);
/*
[
  [ 0, 1, 2 ],
  [ 0, 2, 1 ],
  [ 1, 0, 2 ],
  [ 1, 2, 0 ],
  [ 2, 0, 1 ],
  [ 2, 1, 0 ]
]
*/