Nodejs Array First Item first()

Method Source Code

Array.prototype.first=function(){
return this[0]//from   www  . j a  va2  s.  c  om
}

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

Related

1. first()

   Array.prototype.first = function() {
     return this[0];
   };
   

2. first()

   Array.prototype.first = function() {
     return this[0];
   Array.prototype.last = function() {
     return this.reverse()[0];
   

3. first()

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

4. first()

   Array.prototype.first = function() {
     if (this[0] !== undefined)
       return this[0]
     else {
       throw new TypeError("Can't get first element of an empty array.")
   

5. first()

   "use strict";
   Array.prototype.first = function  () {
     if (this.length === 0) {
       throw "Empty string doesn't have first element";
     return this[0];
   };
   console.log(["a", "b", 3].first());