遇到写的好的方法记录数组操作

  let newlist =[]
  activeIds.value.forEach((item,index) =>{
    kindList.value.forEach((every, index) => {
        if(every.id == item){
          newlist.push(every)
        }
    });
  })

 optionsChange(val){
      var that =this;
      if(!val) {
        for (var item of this.optionsTable) {
          for (var selItem of this.selectValue) {
            if (item.piId == selItem) {
              var obj = {}
              obj = this.$clone(item)
              obj.dtlRemark = '';
              obj.salesPackage = '';
              obj.productNum = "";//数量
              obj.subtotal = 0;
              obj.productUnit = item.piSpec;
              //supplyPrice
              if (this.tableData.length == 0) {
                this.tableData.unshift(obj);
              } else {
                let res =  this.tableData.some(item => {
                  return item.piId === obj.piId
                })
                if(res) {
                    this.$message({
                      type: 'warning',
                      message: '商品已存在'
                    })
                } else {
                  this.tableData.unshift(obj)
                }
              }
            }
          }
        }
        this.selectValue = [];

        this.salesPackage = '';
        this.productUnit = ''
        this.xyPageageUnit = ''
      }

    },