import { R } from "https://deno.land/x/ahh@v0.10.1/mod.ts";
Returns res if it is an Ok, or returns default_.
Examples
import { R } from "./mod.ts";
console.log(R.unwrapOr<number, Error>(1, 2)); // 1
console.log(R.unwrapOr(Error(), 2)); // 2