# findFirst

Find the first value satisfying a predicate.

## Signatures

```ts
export declare const findFirst: {
    <A>(predicate: (a: A) => boolean): <E, R>(ref: RefChunk<A, E, R>) => RefSubject.Filtered<A, E, R>;
    <A, E, R>(ref: RefChunk<A, E, R>, predicate: (a: A) => boolean): RefSubject.Filtered<A, E, R>;
};
```

## Why

Models the possibly absent result of find first as Filtered state, so absence stays explicit
while later source versions can make a value available.

## Ownership and lifetime

The find first view retains no independent value. Its Effect read fails with NoSuchElement
while absent; the observing Scope owns and finalizes its Fx subscription.