Function hashGroupKey

packages/effect/src/RequestResolver.ts:305–316

(get: (entry: Request.Entry<A>) => K)

  })

const hashGroupKey = <A, K>(get: (entry: Request.Entry<A>) => K) => {
  const groupKeys = MutableHashMap.empty<K, K>()
  return (entry: Request.Entry<A>): unknown => {
    const key = get(entry)
    const okey = MutableHashMap.get(groupKeys, key)
    if (okey._tag === "Some") {
      return okey.value
    }
    MutableHashMap.set(groupKeys, key, key)
    return key
  }
}

/**
 * Constructs a request resolver from a pure function.