Import
import { RefArray } from "@typed/fx";Access RefArray.groupBy through the imported RefArray export. Its declaration below describes the member.
This public exposure is a re-export. Its import path is supported; declaration documentation is shared with the other public exposures below.
Signatures
export declare const groupBy: {
<A>(f: (a: A) => string): <E, R>(ref: RefArray<A, E, R>) => RefSubject.Computed<R, E, Record<string, ReadonlyArray<A>>>;
<A, E, R>(ref: RefArray<A, E, R>, f: (a: A) => string): RefSubject.Computed<R, E, Record<string, ReadonlyArray<A>>>;
};Why
Projects array state with group by for both current reads and future pushes, avoiding a second mutable cache of the derived value.
Ownership and lifetime
The group by view retains no independent state. An Effect read samples the source once; Fx observation follows later pushes and its observing Scope owns subscription cleanup.
Other public imports
These import paths expose the same declaration. Each page retains its own public name and signature.