Javascript Array trim(deleteValue)

Array.prototype.trim = function(deleteValue) {
  var i;//from w ww .  j a  v  a  2  s. c o m

  // Remove from start
  for (i = 0; i < this.length && this[i] == deleteValue;) {
    this.splice(i, 1);
  }

  // Remove from end
  for (i = this.length-1; i >= 0 && this[i] == deleteValue; --i) {
    this.splice(i, 1);
  }

  return this;
};