map
import { map } from "https://github.gh-proxy.cn/raw.githubusercontent.com/baetheus/fun/main/datum.ts";Apply a function to the value in a Datum.
@example
import { map, replete, initial } from "./datum.ts";
import { pipe } from "./fn.ts";
const datum = pipe(
replete(5),
map(n => n * 2)
);
console.log(datum); // { tag: "Replete", value: 10 }