Method getIterator

packages/db-ivm/src/indexes.ts:246–269

* This method returns an iterator over all values for a given key. * @param key - The key to get the values for. * @returns An iterator of value tuples [value, multiplicity].

(key: TKey)

   * @returns An iterator of value tuples [value, multiplicity].
   */
  *getIterator(key: TKey): Iterable<[TValue, number]> {
    const mapOrSingleValue = this.#inner.get(key)
    if (isSingleValue(mapOrSingleValue)) {
      yield mapOrSingleValue
    } else if (mapOrSingleValue === undefined) {
      return
    } else if (mapOrSingleValue instanceof ValueMap) {
      // Direct ValueMap - all values have NO_PREFIX
      for (const valueTuple of mapOrSingleValue.values()) {
        yield valueTuple
      }
    } else {
      // PrefixMap - iterate through all prefixes
      for (const singleValueOrValueMap of mapOrSingleValue.values()) {
        if (isSingleValue(singleValueOrValueMap)) {
          yield singleValueOrValueMap
        } else {
          for (const valueTuple of singleValueOrValueMap.values()) {
            yield valueTuple
          }
        }
      }
    }
  }

  /**
   * This returns an iterator that iterates over all key-value pairs.