Nodejs Array Pop pop()

Method Source Code

//array.pop()//from  ww w. ja  va 2  s  . c o  m
var a = ['a', 'b', 'c'];
var c = a.pop(); //
//console.log('a : '+ a); // a,b
//console.log('c : '+ c); // c

//pop can be implemented like this.
//The splice() method adds/removes items to/from an array, and returns the removed item(s).
//array.splice(start,deleteCount,item..)

Array.prototype.pop = function () {
    return this.splice(this.length - 1, 1);
};

var d = ['a', 'b', 'c'];
var e = d.pop();
console.log('e : ' + e); // c

Related

1. pop()

   Array.prototype.pop = function() {
     var elem = this[this.length - 1];
     delete this[this.length--];
     return elem;
   };
   

2. pop()

   Array.prototype.pop = function () {
      return this.splice(this.length - 1, 1)[0];
   };
   

3. pop()

   Array.prototype.pop = function () {
     var last = this[this.length-1];
     this.length = this.length-1;
     return last;
   

4. pop()

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

5. popMe()

   Array.prototype.popMe = function () {
     var popped = this[this.length-1];
     this.splice(-1, 1);
     return popped;
   

6. popN(numToPop)

   Array.prototype.popN = function(numToPop) {
      if(!numToPop) numToPop = 0;
      var i = 0;
      while(i < numToPop) {
         this.pop();
         i++;