import { decoder } from "https://deno.land/x/fun@v.2.0.0-alpha.11/mod.ts";
const { contramap } = decoder;
Map over the input of a Decoder contravariantly. This allows one to use an existing decoder against a transformed input.
import { decoder } from "https://deno.land/x/fun@v.2.0.0-alpha.11/mod.ts";
const { contramap } = decoder;
Map over the input of a Decoder contravariantly. This allows one to use an existing decoder against a transformed input.