Javascript Array extend(array)

// takes an array and add it's eliments to the end of this array
// a = [1, 2, 3]//from   www .  ja  va  2 s  . co m
// b = [4, 5, 6, 7]
// a.extend(b)
// a => [1, 2, 3, 4, 5, 6, 7]
Array.prototype.extend = function(array)
{
    this.push.apply(this, array)
}

// use native index of to test for inclution
Array.prototype.inArray = function(val)
{
    return (this.indexOf(val) > -1)
}

Array.prototype.extend = function(array){
  for (var j = array.length-1; j >= 0; j--) this.unshift(array[j]);
  return this;/*from w w w. j  a  v a 2 s  . co  m*/
};

Function.prototype.bind = function(bind,args){
  var self = this;
  var options = args;
  return function(){
    var args = (options != undefined) ? options.extend(arguments) : arguments;
    return (function(){
      return self.apply(bind || null, args);
    })();
  }
};