Распечатать все перестановки из N цифр

var arr = [1,2,3,4,5];
function combinator(matrix){
  return matrix.reduceRight(function(combination, x){
    var result = [];
    x.forEach(function(a){
      combination.forEach(function(b){
        result.push( [ a ].concat( b ) );
      });
    });
    return result;
  });
};
 
console.log( combinator([ arr, arr, arr, arr, arr ] ).length);

function mutation(def, move, len){
  var result = [], arr = Array(len), tmp;
  for (var i = 0; i < len; i++) arr[i] = def;
  while (len--) {
    tmp = arr.slice();
    tmp[len] = move;
    result.push(tmp);
  }
  return result;
}
 
 
console.log(mutation(1, 7, 5));

Array.prototype.uniq = function () {
  for (var tmp = {}, len = this.length; len--; tmp[this[len]] = 1);
  return Object.keys(tmp);
};
 
function combinator(arr, len, data){
  var count = arr.length, tmp = [], tmpArr;
  data = data || arr;
  if(--len === 0){
    return data;
  }
  data.forEach(function(val){
    arr.forEach(function(v){
      tmpArr = [ v ].concat( val );
      len === 1
      ? (tmpArr.uniq().length === count && tmp.push(tmpArr))
      : tmp.push(tmpArr);
    });
  });
  return combinator(arr, len, tmp);
};
 
var arr = [1,2,3,4,5];
var result = combinator(arr, 5);
console.log(result.length); //120
console.dir(result);

let mutation = (arr, len)=> {
  let table = {}, temp = [],
    uniqAndHashTable = arr=> {
      return arr.filter((a)=> {
        table[a] = ++table[a] || 1;
        return table[a] === 1;
      });
    },
    limit = (data, value)=> {
      return table[value] === data.reduce((previous, current) => {
          return previous += current === value ? 1 : 0;
        }, 0);
    };
  arr = uniqAndHashTable(arr);
  while (len--) temp[len] = arr;
  return temp.reduce((previous, current)=> {
    let result = [];
    current.forEach((a)=> {
      previous.forEach((b)=> {
        if ((Array.isArray(b) && limit(b, a)) || (a === b && table[a] === 1)) return true;
        result.push([a].concat(b));
      });
    });
    return result;
  });
};
 
console.dir(mutation([1, 2, 3, 4, 4], 4));
console.log(mutation([1, 2, 3, 4, 4], 5).length); //60
console.log(mutation([1, 2, 3, 4, 5], 5).length); //120