monad-ts/src/maybe.d.ts

Monad-ts is a small library implements some of key monads and way to chain them in a pipe (flow) in JavaScript and TypeScript. Angular 2+ compatible.

import { Monad } from "./monad";
import { MF } from "./types/mf";
import { Pr } from "./types/pr";
/**
 * Class Maybe - return given value or produce null if take nothing or get nothing after execution of f(v).
 * @extends {Monad}
 */
export declare class Maybe<T> extends Monad<T> {
    /**
     * Chains the operations on a monadic values.
     * @method bind
     * @param {MF<T, U>} f - transformation function for a monad.
     * @param {T} v - underlying value for a monad.
     * @return {Pr<U>} transformed by f() value v.
     */
    bind<T, U>(f: MF<T, U>, v: T): Pr<U>;
    /**
     * Return nothing (null).
     * @method nothing
     * @return {null}
     */
    nothing(): any;
}