// Like `Array.prototype.findIndex`, but searches from the end.
export function findLastIndex<T>(array: T[], fn: (item: T, index: number, arr: T[]) => void[]): number {
  for (let index = array.length - 1; index >= 0; index--) {
    if (fn(array[index], index, array)) return index;
  }

  // There are currently no usages of `findLastIndex` where nothing is found.
  // istanbul ignore next
  return -1;
}