vue抽取两个数组的数据组装一个新数组

实际开发场景中，后台返回的数据不一定满足功能需求，这时候就需要根据条件将数据重新组装 ：

GetPermissionList() {
               this.loading = true
                   this.$axios({
                       method: "post",
                       url: this.postUrl.GetProjectListUrl,
                       data: this.$qs.stringify({ 
                       isGlobal:this.formselect.IsGlobal
                                     })
                                  })
                   .then(res => {
                       this.formselect.totals = res.data.Total
                       let tableData = [];
                       let tableChildrenData = [];
                       res.data.Data.forEach((it, inx) => {
                           if (it.ParentId == 0) {
                               tableData.push(it)
                           } else {
                               tableChildrenData.push(it)
                           }
                       });
                       tableData.forEach((it0, inx0) => {
                           it0.Children = [];
                           tableChildrenData.forEach((it1, inx1) => {
                               if (it1.ParentId == it0.ID) {
                                   it0.Children.push(it1)
                               }
                           });
                       });
                       this.tableData = tableData;
                       this.loading = false
                   })
                   .catch(res => {
                   })
                  }