Javascript Array reverses()

Array.prototype.reverses = function() {
 let i,// www  . ja  v a 2 s  .co  m
     j;
    
    for (i = 0, j = this.length - 1; i < j; i++, j--) {
  let current = this[i];

  this[i] = this[j];
  this[j] = current;
 }

 return this;
}

let a = [1,2,3,4,5];

console.log( a.reverses() );