Nodejs Array First Item first()

Method Source Code

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

Related

1. first()

   Array.prototype.first = function () {
       this.current = 0;
       return jQuery.extend(true, [], this[this.current]);
   };
   Array.prototype.last = function () {
       this.current = this.length - 1;
       return jQuery.extend(true, [], this[this.length - 1]);
   };
   Array.prototype.next = function () {
   ...
   

2. first()

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

3. first()

   Array.prototype.first = function() {
     return this[0];
   Array.prototype.last = function() {
     return this[this.length-1];
   

4. first()

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

5. first()

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