vue 数组添加数据「建议收藏」

<template>
  	<div>
		<ul>
		  <li v-for="(time,index) of listTable" :key="index" @click="copyNew(time,index)">
		    {
  
  {time.id}}{
  
  {time.name1}}{
  
  {time.name2}} 添加
		  </li>
		</ul>
	</div>
</template>

<script>
export default {
	 data(){
	    return{
	      listTable:[
	        {id:'1',name1:'a1',name2:'b1'},
	        {id:'2',name1:'a2',name2:'b2'},
	        {id:'3',name1:'a3',name2:'b3'},
	      ],
	    }
	  },
 }
 </script>

let newList = {
   id:'4'
   name1:'a4',
   name2:'b4',
 }
this.listTable.unshift(newList)  //unshift()在数组头部添加一条数据 
console.log(this.listTable)

this.listTable.push(newList)  //push()在数组末端添加一条数据 
console.log(this.listTable)

 copyNew(time,index){
   console.log(time)
   let newList = {
     id:time.id,
     name1:time.name1,
     name2:time.name2,
   }
   //第一个参数为需要操作数据的下标，第二个参数为操作添加/删除(0为添加，1为不操作，2为删除，3为删除多条数据)，第三个参数可选
   this.listTable.splice(index,0,newList) 
   console.log(this.listTable)
 }

let arrA = [1,2,3]
let arrB = [4,5]
arrA.concat(arrB) // 输出 1,2,3,4,5

let arrC = [6,7]
arrA.concat(arrB,arrC) // 输出 1,2,3,4,5,6,7