Nodejs Array Peek peek()

Method Source Code

/**//from  w w w  .j  a  v  a2  s. com
 * Add peek() to the Javascript Array prototype
 * Returns the top of the stack or null
 * if the stack is empty without pop()ing it off.
 * http://ajax.sys-con.com/node/347048 accessed 06/02/2010
 * Reprint of Real-World AJAX: Secrets of the Masters published by SYS-CON ISBN 0-9777622-0-3 
 */
Array.prototype.peek = function(){
    if (this.length > 0){
        return this[this.length - 1];
    } else {
        return null;
    }
}

Related

1. peek()

   Array.prototype.peek = function () {
     return this[this.length - 1];
   };
   

2. peek()

   Array.prototype.peek = function() {
       var index = Math.floor(Math.random() * this.length);
       return this[index];
   };
   

3. peek(index)

   Array.prototype.peek = function(index) {
      if(!index) index = 0;
      return this[this.length - index - 1];
   

4. _peek()

   Array.prototype._peek = function(){
       if(this.length > 0) return this[this.length - 1];
       return null;
     };