Returns ((opt) => Option<U>)

The function from Option<T> to Option<U>.

Examples

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

const strLen = map((str: string) => str.length);

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

• • (opt): Option<U>

  • Parameters

    • opt: Option<T>

    Returns Option<U>