/**
 * Maps a value.
 *
 * @example
 *
 * ```ts
 * assert.deepStrictEqual(pipe(1, map(n => n + 1)), 2)
 * ```
 */
export declare const map: <A, B>(f: (a: A) => B) => (a: A) => B;
/**
 * Uses a value to make a mapping.
 *
 * @example
 *
 * ```ts
 * assert.deepStrictEqual(use(1, n => n + 1), 2)
 * ```
 */
export declare const use: <A, B>(a: A, f: (a: A) => B) => B;
/**
 * Uses a value to do something extra.
 *
 * @example
 *
 * ```ts
 * assert.deepStrictEqual(also(1, () => void 0), 1)
 * ```
 */
export declare const also: <A>(a: A, f: (a: A) => void) => A;
/**
 * Returns onTrue result if the condition is Truthy, otherwise returns the onFalse result.
 *
 * @example
 *
 * ```ts
 * assert.deepStrictEqual(pipe(true, match(() => 1, () => 0)), 1)
 * assert.deepStrictEqual(pipe(false, match(() => 1, () => 0)), 0)
 * ```
 */
export declare const match: <A, B>(onTrue: () => A, onFalse: () => B) => (condition: boolean) => A | B;
/**
 * Gets a value from source by the given key.
 *
 * Sets a value with the initial function if source doesn't [has](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/hasOwn) the key.
 *
 * @example
 *
 * ```ts
 * const source: Record<string, number> = { a: 0 }
 * assert.deepStrictEqual(getOrSet(source, 'a', () => 1), 0)
 * assert.deepStrictEqual(getOrSet(source, 'b', () => 1), 1)
 * assert.deepStrictEqual(source['b']), 1)
 * ```
 */
export declare const getOrSet: <T extends Record<string, unknown>, K extends keyof T>(source: T, key: K, initialValue: () => T[K]) => T[K];
/**
 * Makes a try with a error callback.
 *
 * @example
 *
 * ```ts
 * assert.deepStrictEqual(tryWithCallback(() => 1, () => 2), 1))
 * assert.deepStrictEqual(tryWithCallback((): number => { throw 'error' }, () => 2), 2))
 * ```
 */
export declare const tryWithCallback: <A extends () => any>(a: A, callback: (err: unknown) => ReturnType<A>) => ReturnType<A>;