Function copyArrayItem

src/cdk/drag-drop/drag-utils.ts:63–74

(
  currentArray: T[],
  targetArray: T[],
  currentIndex: number,
  targetIndex: number,
)

 *
 */
export function copyArrayItem<T = any>(
  currentArray: T[],
  targetArray: T[],
  currentIndex: number,
  targetIndex: number,
): void {
  const to = clamp(targetIndex, targetArray.length);

  if (currentArray.length) {
    targetArray.splice(to, 0, currentArray[currentIndex]);
  }
}

/** Clamps a number between zero and a maximum. */
function clamp(value: number, max: number): number {