/** Returns the last index of an item based on a given criteria. */
export function findLastIndex<T>(array: T[], predicate: (item: T) => boolean) {
  for (let i = array.length - 1; i >= 0; i--) {
    if (predicate(array[i])) {
      return i;
    }
  }
  return -1;
}

/** Returns a list of items that intersect between two given arrays. */
export function intersecting<T>(a: T[], b: T[]): T[] {
  const [c, d] = a.length > b.length ? [a, b] : [b, a];
  return c.filter((value) => d.includes(value));
}