Function splitIndexInKeys

packages/effect/src/internal/configProvider.ts:656–675

(
  map: Map<string, string>,
  unmakePathString: (str: string) => ReadonlyArray<string>,
  makePathString: (chunk: ReadonlyArray<string>) => string
)

}

const splitIndexInKeys = (
  map: Map<string, string>,
  unmakePathString: (str: string) => ReadonlyArray<string>,
  makePathString: (chunk: ReadonlyArray<string>) => string
): Map<string, string> => {
  const newMap: Map<string, string> = new Map()
  for (const [pathString, value] of map) {
    const keyWithIndex = pipe(
      unmakePathString(pathString),
      Arr.flatMap((key) =>
        Option.match(splitIndexFrom(key), {
          onNone: () => Arr.of(key),
          onSome: ([key, index]) => Arr.make(key, `[${index}]`)
        })
      )
    )
    newMap.set(makePathString(keyWithIndex), value)
  }
  return newMap
}

const splitIndexFrom = (key: string): Option.Option<[string, number]> => {
  const match = key.match(STR_INDEX_REGEX)