标签:运算 obj == arguments nbsp 补充 数组 and const
class Human { constructor(name, age) { //name age 是传参 this.name = name; this.age = age } } let ren = new Human("小明", 100); // 使用Human类,实例化类 console.log(ren.name); console.log(ren.age); // 第二种写法推荐==================================== class Human1 { constructor() { //name age 是传参 let a = {...{name: "xiaoliu", age: 10}, ...arguments[0]}; this.name = a.name; this.age = a.age; //创建方法 this.eat= function (food="默认食物") { // 在方法中使用属性 console.log(this.name+"在吃",food); } } } let ren1 = new Human1({name: "小李", age: 30}); // 使用Human类,实例化类 console.log(ren1.name); console.log(ren1.age); ren1.eat("小面包"); console.log("++++++++++++++++++++++"); // =============================================== // 关于...的用法 //合并数组 console.log("合并数组") let obj1 = [10, 50, true, "Fly"]; console.log(obj1) let obj2 = [20, 60, false, "Land"]; let obj3 = [...obj1, ...obj2]; let objls=[obj1,obj2] console.log(obj3); console.log(objls) // ...扩展运算符 注意后来这居上 最后的结果是obj6=obj5 let obj4={name:"小明",age:10}; let obj5={name:"小娟",age:20}; let obj6={...obj4,...obj5}; console.log(obj6) // ==============================================
标签:运算 obj == arguments nbsp 补充 数组 and const
原文地址:https://www.cnblogs.com/defeat501514010/p/14856810.html