MapHashMapToHashMap applies a transformation function to a hashmap and returns a new hashmap.

MapHashMapToHashMapReturnWithError applies a transformation function to a hashmap and handles errors.

MapHashMapToList applies a transformation function to a hashmap and returns a list.

MapHashMapToListReturnWithError applies a transformation function to a hashmap, returning a list with error handling.

MapToHashMap converts a list to a hashmap using a transformation function.

MapToHashMapReturnWithError converts a list to a hashmap with error handling.

SliceToHashMap converts a slice to a map with boolean values indicating presence.