Returns (<T>(f) => ((opt) => U))

The mapped value or init.

Examples

import { some, mapOr, none } from "./option.ts";
import { assertEquals } from "../deps.ts";

const strLenOrAnswer = mapOr(42)((str: string) => str.length);

assertEquals(strLenOrAnswer(some("Hello, World!")), 13);
assertEquals(strLenOrAnswer(none()), 42);
Copy

• • <T>(f): ((opt) => U)

  • Type Parameters

    • T

    Parameters

    • f: ((t) => U)

      • • (t): U

        • Parameters

          • t: T

          Returns U

    Returns ((opt) => U)

    • • (opt): U

      • Parameters

        • opt: Option<T>

        Returns U