import { option } from "https://deno.land/x/fun@v2.0.0/mod.ts";
const { isNone } = option;
Tests wether an Option is None, returning true if the passed option is None and false if it is Some.
Examples
Example 1
Example 1
import * as O from "./option.ts";
const result1 = O.isNone(O.none); // true
const result2 = O.isNone(O.some(1)); // false