Closure

WithNamespace

//IIEF don't populate window namespace
(function () {
    // Create a name space  
    var answers = answers || {};
    answers = {

        meta: function (fn) {
            console.log("en meta");
            fn();
        },
        fun: function () {
            console.log("funcion");
        },
        makeClosure: function (fn) {
            var _this = this;
            return function () {
                return fn(_this.fun);
            };
        },
        testIIFE: function (lista) {
            var _this = this;
            for (var i = 0; i < lista.length; i++) {
                (function () {
                    return lista[i](_this.fun);
                }());
            }
        },
        testClosure: function (lista) {
            for (var i = 0; i < lista.length; i++) {
                this.makeClosure(lista[i])();
            }
        }

    };

    var lista = [answers.meta, answers.meta, answers.meta];
    answers.testIIFE(lista);
    answers.testClosure(lista);
    
}());

wtf.js

(function () {

    function meta(f) {
        console.log("en meta");
        //Invoke f
        f();
    }
    var lista = [meta, meta, meta];
    var fun = function () {
        console.log("funcion");
    }

    var makeClosure = function (fn) {
        return function () {
            return fn(fun);
        };
    };
    //Using function create scope
    for (var i = 0; i < lista.length; i++) {
        makeClosure(lista[i])();
    }
    //Using an IIFE 
    for (var i = 0; i < lista.length; i++) {
        (function () {
            return lista[i](fun);
        }())
    }

    fun();
}());