export declare function assert(condition: boolean, failureMessage?: string): asserts condition;
export declare function checkedAllCases(witness: never): never;
export declare function identity<T>(x: T): T;
export declare function zip<A, B>(arrayA: readonly A[], arrayB: readonly B[]): Generator<[A, B]>;
export declare function adjacentPairs<T>(array: readonly T[]): Generator<[T, T]>;
export declare function uniqWith<T>(array: T[], compare: (l: T, r: T) => number): T[];
export declare function hashNums(nums: number[], seed?: number): number;
export declare function hashStr(str: string, seed?: number): number;
export declare function xor(a: number, b: number): number;
export declare function minBy<T>(iterable: Iterable<T>, scoreOf: (item: T) => number): T | undefined;
export declare function sum(items: number[]): number;
export declare function isOneOf<T>(item: unknown, array: readonly T[]): item is T;
export declare function todo<T>(msg?: string): T;
export declare function assertSubtype<_Sub extends Super, Super>(): void;