Function spliceOne

src/array.ts:25–44

(arr: T[], index: number)

 * @return {Array} the array instance
 */
export function spliceOne<T = any>(arr: T[], index: number): T[] {
  if (index < 0) {
    index = arr.length + index;
    // still negative, not found element
    if (index < 0) {
      return arr;
    }
  }

  // don't touch
  if (index >= arr.length) {
    return arr;
  }

  for (let i = index, k = i + 1, n = arr.length; k < n; i += 1, k += 1) {
    arr[i] = arr[k];
  }
  arr.pop();
  return arr;
}