问题如下，已经完成单个对象的简单应用，希望定义一个数组，能包含多个student。
var student = new Object();
student.name = "Lanny";
student.age = "25";
student.location = "China";
var json = JSON.stringify(student);
方法一：
var students = [];
students[students.length] = new Object();
students[students.length].name = "Lanny";
students[students.length].age = "25";
students[students.length].location = "China";
var json = JSON.stringify(students);
方法二：
var student = new Object();
student.name = "Lanny";
student.age = "25";
student.location = "China";
students = (students || []).push(student);
var json = JSON.stringify(students);