Partition.tsimport * as Array from 'fp-ts/Array'; import * as Separated from 'fp-ts/Separated'; import { pipe } from 'fp-ts/function'; type User = { name: string; isActive: boolean; }; const users = [ { name: 'Alice', isActive: true }, { name: 'Bob', isActive: true }, { name: 'Charlie', isActive: false }, ]; function userIsActive(user: User) { return user.isActive; } const deactivatedUsers = pipe( users, Array.partition(userIsActive), Separated.left ); // [{name: 'Charlie', isActive: false}] Back to Snippets