JavaScript 365笔记第46天 apply,call实例和继承

1.apply，call的实例； 2.用apply，call实现继承；

// 用apply实例
		function Car(brand,color,displacement){
			this.brand = brand;
			this.color = color;
			this.displacement = displacement;
			this.info = function(){
				return '排量为'+this.displacement+'的'+this.color+this.brand;
			}
		}
		function person(opt){
			Car.call(this,opt.brand,opt.color,opt.displacement);
			// Car.apply(this,[opt.brand,opt.color,opt.displacement]);
			this.name = opt.name;
			this.age = opt.age;
			this.say = function(){
				console.log('年龄为'+this.age+'的'+this.name+'买了一辆'+this.info())
			}
		}

		var p = new person({
			brand:'benz',
			color:'红色的',
			displacement:'3.0',
			name:'张三',
			age:'25'
		})

		p.say();

  //2.用call，apply实现继承
  function Teacher(name,age){
		this.name = name;
		this.age = age;
	}

  function Student(name,age,skill,major){
		Teacher.apply(this,[name,age]);
		this.skill = skill;
		this.major = major
	}
  var student = new Student('张三',46,'computer','soft')
  console.log(student)
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