数组比较的n

模拟数据

    data () {    return {      array: [        {          id: 1,          name: 云朵,          statevoid: false        },        {          id: 2,          name: 白云,          statevoid: false        },        {          id: 3,          name: 彩虹,          statevoid: false        }     ],     parray: [       {         id: 2,         name: 云朵,         statevoid: false      },      {        id: 6,        name: 白云,        statevoid: false      },      {        id: 7,        name: 彩虹,        statevoid: false      }    ]  }}

js部分

var mapper = {}this.array.forEach(function (item, index, array) {  mapper[item.id] = index})// console.log(mapper)let that = thisthis.parray.forEach(function (item, index, array) {  let value = mapper[item.id]  // console.log(value)  if (value !== undefined) {    that.array[value].statevoid = true  }})console.log(this.array)