Nodejs Array Last last(predicate, def)

Method Source Code

Array.prototype.last = function (predicate, def) {
   var l = this.length;
   if (!predicate) return l ? this[l - 1] : def == null ? null : def;
   while (l-- > 0){
      if (predicate(this[l], l, this))
         return this[l];
   }//from w w w  . ja  v a  2 s . c o  m

   return def == null ? null : def;
};

Related

1. last(fn, scope)

   Array.prototype.last = function(fn, scope) {
       if (Object.prototype.toString.call(this) !== '[object Array]') {
           throw new TypeError("`this` must be Array, not " + typeof this);
       if (typeof fn === 'undefined') {
           return this[this.length - 1];
       if (typeof fn !== 'function') {
           throw new TypeError("Optional argument[0] must be predicate function if defined");
   ...
   

2. last(func)

   Array.prototype.last = function (func) {
       var length = this.length - 1,
           item = null;
       for (var i = length; i >= 0; i--) {
           if (func(this[i])) {
               item = this[i];
               break;
       return item;
   

3. last(n)

   Array.prototype.last = function (n) {
       'use strict';
       return this.slice(this.length - (n || 1), this.length);
   };
   

4. last(n)

   Array.prototype.last = function(n) {
     if (this.length == 0 || n < 0) return void 0;
     if (n == undefined) return this[this.length - 1];
     if (n == 0) return [];
     return this.rest(this.length - n);
   };
   

5. last(num)

   Array.prototype.last = function (num) {
      if (num !== undefined) {
         return this.slice(-num);
      return this[this.length - 1];
   };
   

6. last(t)

   Array.prototype.last = function(t) {
     if (t !== undefined) {
       this[this.length - 1] = t;
     } else {
       return this[this.length - 1];
   

7. last(value)

   Array.prototype.last = function(value) {
     if (this.length) {
       var last = this[this.length-1];
       if (value != undefined)
         return (value == last) ? true : false;
       else  
         return last;
     return '';
   ...
   

8. last(value)

   Array.prototype.last = function(value) {
     if (this.length) {
       var last = this[this.length-1];
       if (value != undefined)
         return (value == last) ? true : false;
       else  
         return last;
     return '';
   ...
   

9. last100()

   Array.prototype.last100 = function () {
       if (this.length < 100) return this;
       var last100 = [];
       var start = this.length-101;
       for (var i = 0; i < 100; i++)
         last100.push(this[i + start]);
       return last100;