vue中怎么删除一条数据

let arr = [1,2,3,4,5];
 
//方法一
let index = arr.indexOf('3');
arr.splice(index, 1)
//打印结果 [1,2,4,5]
//方法二
let index = arr .findIndex(item => {
            if (item == '3') {
              return true
            }
          })
arr.splice(index, 1)
//打印结果 [1,2,4,5]

let arr = [
    {
       id:1,
       name:'张三'
    },
    {
       id:2,
       name:'李四'
    },
    {
       id:3,
       name:'王二'
    },
    {
       id:4,
       name:'麻子'
    },
];
let id1 = arr.findIndex(item => {
      if (item.id == '3') {
          return true
      }
 })
 arr.splice(id1, 1)