javascript对象创建

Question

我有一个像这样的javascript对象

 var student = function () {
     this.id = 1;
     this.Name = "Shohel";
     this.Roll = "04115407";
     this.Session = "03-04";
     this.Subject = "CSE";
 };

我有一个像这样的javascript数组列表

var students = [];

现在我想把学生推向学生,如下所示

students.push(new student())  //no prolem

students.push(new student[id = 3]) //Problem

这里第二行出现异常,如何将javascript对象推送为c#add list,这是代表第二行？谢谢

Answer 1

你根本做不到,你可以做的虽然是接受一个配置作为你的构造函数的参数,并像这样读取它

var student = function (config) {
                config = config || {};
                this.id = config.id || 1;
                this.Name = config.Name || "Shohel";
                this.Roll = config.Roll || "04115407";
                this.Session = config.Session || "03-04";
                this.Subject = config.Subject || "CSE";
            };

并称之为这样

students.push(new student({id: 3}));

编辑,首选

正如adeneo所指出的,如果你想摆脱||默认值的重复,你可以使用jQuery传递它们

var student = function (config) {
                    var defaults = {
                        id: 1,
                        Name: "Shohel",
                        Roll: "04115407",
                        Session: "03-04",
                        Subject: "CSE"
                    };
                    config = $.extend(defaults, config || {});
                    this.id = config.id;
                    this.Name = config.Name;
                    this.Roll = config.Roll;
                    this.Session = config.Session;
                    this.Subject = config.Subject;
                };

Answer 2

使值成为函数的可变参数.例如:

var Student = function (id) {
  this.id = id;
  // ...
};

students.push(new Student(3));

我建议阅读有关函数的JavaScript教程:

• MDN - JavaScript指南
• 雄辩的JavaScript - 功能
• quirksmode.org - 功能