Javascript Array insertAt(index, item)

Array.prototype.insertAt = function(index, item) {
  this.splice(index, 0, item);// ww w .  j a  va2 s .  co m
  return this;
};

Array.prototype.insertAt = function(index, item) {
  this.splice(index, 0, item);//from   w w w .  ja v  a  2  s  .c  om
  return this;
};

String.prototype.capitalizeFirst = function() {
  return this.charAt(0).toUpperCase() + this.slice(1);
};