/**
 * 添加一行，默认添加到最后一行
 *
 * @category Utils
 * @template T
 * @param {T[]} arr
 * @param {T} addItem
 * @param {number} [insertIndex=arr.length]
 * @return {*}
 */
export const onAddData = <T = any>(
  arr: T[],
  addItem: T,
  insertIndex: number = arr.length,
) => {
  const newArr = [...arr];
  newArr.splice(insertIndex, 0, addItem);
  return newArr;
};