Nodejs Array Last last(func)

Method Source Code

Array.prototype.last = function (func) {
    var length = this.length - 1,
        item = null;//from  w  w w . j ava2  s . c  om

    for (var i = length; i >= 0; i--) {
        if (func(this[i])) {
            item = this[i];
            break;
        }
    }

    return item;
}

Related

1. last()

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

2. last()

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

3. last()

   Array.prototype.last = function() {
       if (this.length == 0) return null
       return this.slice(this.length - 1)[0]
   

4. last(arr)

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

5. 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");
   ...
   

6. last(n)

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

7. 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);
   };
   

8. last(num)

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

9. last(predicate, def)

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