Javascript Array remove(from, to)

Array.prototype.remove = function(from, to) {
  var rest = this.slice((to || from) + 1 || this.length);
  this.length = from < 0 ? this.length + from : from;
  return this.push.apply(this, rest);
};

Array.prototype.remove = function(from, to) {
  var rest = this.slice((to || from) + 1 || this.length);
  this.length = from < 0 ? this.length + from : from;
  return this.push.apply(this, rest);
};

[1,2,3,4].remove(2);/*from   w  w  w.j ava2  s  . c o m*/

/**/*  w ww  .  j  av  a2  s. co  m*/
 * A  much nicer way to remove from the built-in array
 * @param from {number} The first element to remove.
 *                      If the "to" parameter is blank, this is the only
 *                      element that will be removed.
 * @param to {number} The last element to remove.
 */
Array.prototype.remove = function(from, to) {
    var rest = this.slice((to || from) + 1 || this.length);
    this.length = from < 0 ? this.length + from : from;
    return this.push.apply(this, rest);
};

function print(str) {
  console.log(str);//ww  w  .  j a  v a 2 s . co  m
}

Array.prototype.remove = function(from, to) {
  var rest = this.slice( (to || from) + 1 || this.length);
  console.log("rest:"+ rest);

  this.length = from < 0 ? this.length + from : from;

  console.log("this:" + this);
  return this.push.apply(this, rest);
}


var array = ["one", "two","three","four","five","six"];

print(array);

array.remove(1,2);
print(array);

Array.prototype.remove = function(from, to) {
    var rest = this.slice((to || from) + 1 || this.length);
    this.length = from < 0 ? this.length + from : from;
    this.push.apply(this, rest)//w w  w .j a  v  a 2  s.  c o m
    return this;
};

function permutate(n, a) {
  if (a.length === 0) {
     all.push(n);
  }

  else {
     for(var i = 0; i < a.length; i++) {         
         var n_new = n.slice(0);
         n_new.push(a[i]);
         permutate(n_new, a.slice(0).remove(i,i));
     }
  }
}

var all = [];
permutate([], [1, 2, 3, 4]);

for(var i = 0; i < all.length; i++) {
    console.log(all[i]);
}