[morse]Clone an Array / Object

Clone an Array :

const myClonedArray  = Object.assign([], myArray);

Clone an object :

const myClonedObject = Object.assign({}, myObject);

Example:

        this.arsCalendarRows.map(
          row => {
            const a = Object.assign({}, row);
                     delete a['emp_no'];
                     delete a['emp_name'];
            this.arsCalendarRows2.push(a);
          });