import { Maybe } from 'monet';
/**
 * Gets the value of an object at the specified key.
 * @param key - the key to get
 * @returns a Some of the value at the key, or a None otherwise
 * ```typescript
 * pipe(
 *   { x: 3 },
 *   Objects.get('x') // -> Some(3)
 * );
 * ```
 */
export declare function get<T extends object>(key: keyof T): (obj: T) => Maybe<T[typeof key]>;
/**
 * Gets the keys of an object.
 * @returns an array of all the keys the object contains
 * ```typescript
 * pipe(
 *   { x: 2, y: 3 },
 *   Objects.keys() // -> ['x','y']
 * );
 * ```
 */
export declare function keys<T extends object>(noArg?: never): (obj: T) => (keyof T)[];
/**
 * Gets the values of an object.
 * @returns an array of all the values the object contains
 * ```typescript
 * pipe(
 *   { x: 2, y: 3 },
 *   Objects.values() // -> [2,3]
 * );
 * ```
 */
export declare function values<T extends object>(noArg?: never): (obj: T) => T[keyof T][];
/**
 * Gets the entries of an object.
 * @returns an array of all the key/value pairs the object contains
 * ```typescript
 * pipe(
 *   { x: 2, y: 3 },
 *   Objects.entries() // -> [['x', 2], ['y', 3]]
 * );
 * ```
 */
export declare function entries<T extends object>(noArg?: never): (obj: T) => [keyof T, T[keyof T]][];
/**
 * Checks whether the object has a property.
 * @param key - the key to check
 * @returns true if the object has own property for the given key
 * ```typescript
 * pipe(
 *   { x: number },
 *   Objects.has('x') // -> true
 * );
 * ```
 */
export declare const has: <T>(key: any) => (obj: T) => boolean;