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

The filtered optional.

Examples

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

const isEven = filter((x: number) => x % 2 == 0);

assertEquals(isEven(none()), none());
assertEquals(isEven(some(3)), none());
assertEquals(isEven(some(4)), some(4));
Copy

• • (opt): Option<T>

  • Parameters

    • opt: Option<T>

    Returns Option<T>