Select a table of data deletion function

deleteData() {

                if (! this.selection.length) this $ Message.warning ( "Please select the rows to be deleted!");

                let _arr = [];

                this.tableData.forEach((ele, index) => {

                    if (this.selection.indexOf(index) < 0) _arr.push(ele);

                });

                this.tableData = _arr;

                this.selection = [];

            }