@onrails/maybe

Tagged Maybe for expected absence — cache miss, optional field, not-ready-yet. Not for failures (use @onrails/result).

Install

bun add @onrails/maybe
Copy

Usage

import { compactMap, fromNullable, isSome, match, some } from "@onrails/maybe";

const row = fromNullable(db.get(id));

const name = match(
  row,
  (r) => r.name,
  () => "guest",
);
Copy

Result boundary

import { toResult } from "@onrails/maybe/interop";

const user = toResult(fromNullable(row), () => ({ kind: "not_found" as const }));
Copy

Subpaths

See DESIGN.md.