Function dropUndefined

packages/effect-app/src/utils.ts:123–131

(
  input: Dictionary<A | undefined>
)

}

export function dropUndefined<A>(
  input: Dictionary<A | undefined>
): Dictionary<A> {
  const newR = pipe(
    input,
    Record.filter((x): x is A => x !== undefined)
  )
  return newR
}

type GetTag<T> = T extends { _tag: infer K } ? K : never
export const isOfType = <T extends { _tag: string }>(tag: GetTag<T>) => (e: { _tag: string }): e is T => e._tag === tag