export {};

declare global {
  // Manual implementation of https://github.com/microsoft/TypeScript/issues/48829

  interface Array<T> {
    /**
     * Returns the value of the last element in the array where predicate is true, and undefined
     * otherwise.
     * @param predicate findLast calls predicate once for each element of the array, in descending
     * order, until it finds one where predicate returns true. If such an element is found, findLast
     * immediately returns that element value. Otherwise, findLast returns undefined.
     * @param thisArg If provided, it will be used as the this value for each invocation of
     * predicate. If it is not provided, undefined is used instead.
     */
    findLast<S extends T>(
      predicate: (this: void, value: T, index: number, obj: T[]) => value is S,
      thisArg?: unknown
    ): S | undefined;
    findLast(
      predicate: (value: T, index: number, obj: T[]) => unknown,
      thisArg?: unknown
    ): T | undefined;

    /**
     * Returns the index of the last element in the array where predicate is true, and -1
     * otherwise.
     * @param predicate findLastIndex calls predicate once for each element of the array, in descending
     * order, until it finds one where predicate returns true. If such an element is found,
     * findLastIndex immediately returns that element index. Otherwise, findLastIndex returns -1.
     * @param thisArg If provided, it will be used as the this value for each invocation of
     * predicate. If it is not provided, undefined is used instead.
     */
    findLastIndex(
      predicate: (value: T, index: number, obj: T[]) => unknown,
      thisArg?: unknown
    ): number;
  }
}