map
import { map } from "https://github.gh-proxy.cn/raw.githubusercontent.com/baetheus/fun/main/pair.ts";Creates a new Pair with the same second value and a new first value determined by the output of the fai function.
@example
import * as P from "./pair.ts";
import { pipe } from "./fn.ts";
const result = pipe(
P.pair(1, 2),
P.map(String),
); // ['1', 2]