# filterValues

Filter values creating a Computed value.

## Signatures

```ts
export declare const filterValues: {
    <V>(predicate: (value: V) => boolean): <E, R>(ref: RefHashSet<V, E, R>) => RefSubject.Computed<HashSet.HashSet<V>, E, R>;
    <V, E, R>(ref: RefHashSet<V, E, R>, predicate: (value: V) => boolean): RefSubject.Computed<HashSet.HashSet<V>, E, R>;
};
```

## Why

Projects hash set state with filter values for both current reads and future pushes, avoiding a
second mutable cache of the derived value.

## Ownership and lifetime

The filter values view retains no independent state. An Effect read samples the source once; Fx
observation follows later pushes and its observing Scope owns subscription cleanup.