让智能感知对jquery each()回调中的对象起作用

Question

在VS2015中(我也相信在2013年)，我如何让智能感知来识别jquery回调中的对象？在下面的代码(‘测试’函数)中，在非jquery循环中，智能感知知道'person‘是什么，但$.each()回调不知道。

var Person = (function () {
    "use strict";
    var person = function (name, age) {
        this.name = name;
        this.age = age;
    };
    return person;
}());
var People = (function () {
    "use strict";
    var people = function (lang) {
        this.language = lang;
        this.population = [];
    };
    return people;
}());
var test = (function () {
    "use strict";
    var i, person, people = new People('English');
    people.population.push(new Person('joe', 30));
    people.population.push(new Person('jane', 31));

    // method1 : intellisense works - knows what a 'person' is.
    for (i = 0; i < people.population.length; i++) {
        person = people.population[i];
        person.age++;
    }
    // method2 : intellisense does not work
    $.each(people.population, function (index, person) {
        person.age++;
    });
    person = people.population[0];
    alert(person.name + "'s age is now" + person.age);
 }());

Answer 1

使用javascript array.forEach()方法，而不是jquery each()，确实允许智能感知理解数组元素。

people.population.forEach(function (person) {
    person.age += 1;
});

但这两种方法似乎都比基本的' for‘循环慢得多，所以对于大型数组，我将坚持使用它。