R | /mod.ts | ahh@v0.10.0

Idiomatic type-safety structures for TypeScript.

method R.map

import { R } from "https://deno.land/x/ahh@v0.10.0/mod.ts";

map<T, U, E extends Error>(res: Result<T, E>, f: (_: T) => U): Result<U, E>

Calls f with res, and returns the result.

Examples

import { R } from "./mod.ts";

console.log(R.map(1, (i) => i + 1)); // 2
console.log(R.map(Error(), (i: number) => i + 1)); // Error()

E extends Error

res: Result<T, E>

f: (_: T) => U