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？感谢

Answer 1

你根本无法做到，你可以做的是接受一个配置作为你的构造函数的参数并像这样阅读

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";
            };

并像这样称呼它

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

编辑，首选

就像adeneo指出你想要删除重复||的默认值一样，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

创建函数的变量参数的值。例如：

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

students.push(new Student(3));

我建议您阅读有关函数的JavaScript教程：

javascript对象创建

2 个答案: