Question

我需要一个javascript的学生班，其中包括2个数据成员名称和年龄，以及2个方法get_record（）和set_record（名称，年龄）。我如何在javascript中创建并创建该类的多个对象。

Answer 1

var Student  = function(age, name){
  this.age = age;
  this.name = name;

  this.get_age = function(){
      return this.age;
  }
  this.get_name = function(){
      return this.name;
  }
  this.set_age = function(age){
      this.age = age;
  }
  this.set_name = function(name){
      this.name = name;
  }
}

var student = new Student(20,"XYZ");

Answer 2

您可以使用基于JavaScript的新语言对类进行建模。 Dart和TypeScript可能是这方面最受欢迎的。

此示例基于TypeScript类的JavaScript输出。

    var Student = (function() {
        function Student(name, age) {
            this.name = name;
            this.age = age;
        }

        Student.prototype.get_record = function() {
            return "Name: " + this.name + "\nAge: " + this.age;
        }

        Student.prototype.set_record = function(name, age) {
            this.name = name;
            this.age = age;
        }

        return Student;
    })();

// Usage

var a = new Student("John", 23);
var b = new Student("Joe", 12);
var c = new Student("Joan", 44);

Answer 3

function student (age,name) {
        this.name = name;
        this.age = age;
        this.get_record = function() {
              return "name:"+this.name+" , age:"+this.age;
        }
        this.set_record = function(_name,_age) {
             this.name=_name;
             this.age=_age;
        }
    }

Answer 4

您可以使用'构造函数'。

function Student() {
    this.get_record = function(){ return this.name; };
    this.set_record = function(name, age) { 
        this.name = name; 
        this.age = age; 
    };

    return this;
}

var student1 = new Student();
var student2 = new Student();

student1.set_record('Mike', 30);
student2.set_record('Jane', 30);

student1.get_record();
student2.get_record();

通过原型构建更复杂的类结构

如何在javascript中创建一个类

4 个答案: