Function arrayInsert2

packages/core/src/util/array_utils.ts:132–153

(array: any[], index: number, value1: any, value2: any)

 * @param value2 Value to add to array.
 */
export function arrayInsert2(array: any[], index: number, value1: any, value2: any): void {
  ngDevMode && assertLessThanOrEqual(index, array.length, "Can't insert past array end.");
  let end = array.length;
  if (end == index) {
    // inserting at the end.
    array.push(value1, value2);
  } else if (end === 1) {
    // corner case when we have less items in array than we have items to insert.
    array.push(value2, array[0]);
    array[0] = value1;
  } else {
    end--;
    array.push(array[end - 1], array[end]);
    while (end > index) {
      const previousEnd = end - 2;
      array[end] = array[previousEnd];
      end--;
    }
    array[index] = value1;
    array[index + 1] = value2;
  }
}

/**
 * Get an index of an `value` in a sorted `array`.