/**
 * Finds all indexes of a given iterable which match the given predicate.
 */
export declare function findAllIndex<X>(arr: Iterable<X>, predicate: (x: X) => boolean): number[];
/**
 * Checks whether the larger array contains the passed sub-array at any index. O(n*m).
 */
export declare function arrayContainsSub<X>(arr: X[], sub: X[]): boolean;
/**
 * Finds the first index of the subarray in the larger array. This is O(n*m).
 *
 * Returns `-1` if not found.
 */
export declare function findSubArray<X>(arr: X[], sub: X[]): number;
/**
 * Removes the given index from the array, returning it if the index is valid.
 *
 * Swaps the last value of the array into the new position.
 *
 * Has {@link Array.at}-like semantics, supporting negative addressing.
 */
export declare function arraySwapRemoveAt<X>(arr: X[], at: number): X | undefined;
/**
 * Inserts a value at the given index in the array by swapping any previous value to the end.
 *
 * This 'always works' because indexes <=0 are treated as zero, and indexes >=length are treated as a push.
 *
 * Has {@link Array.at}-like semantics, supporting negative addressing.
 */
export declare function arraySwapInsertAt<X>(arr: X[], at: number, value: X): void;