How to use

anagrams

method

in

snippets.Snippets

public static List<String> anagrams(String input) {
  if (input.length() <= 2) {
    return input.length() == 2
        ? Arrays.asList(input, input.substring(1) + input.substring(0, 1))
        : Collections.singletonList(input);
  }
  return IntStream.range(0, input.length())
      .mapToObj(i -> new SimpleEntry<>(i, input.substring(i, i + 1)))
      .flatMap(entry ->
          anagrams(input.substring(0, entry.getKey()) + input.substring(entry.getKey() + 1))
              .stream()
              .map(s -> entry.getValue() + s))
      .collect(Collectors.toList());
}

public static List<String> anagrams(String input) {
  if (input.length() <= 2) {
    return input.length() == 2
        ? Arrays.asList(input, input.substring(1) + input.substring(0, 1))
        : Collections.singletonList(input);
  }
  return IntStream.range(0, input.length())
      .mapToObj(i -> new SimpleEntry<>(i, input.substring(i, i + 1)))
      .flatMap(entry ->
          anagrams(input.substring(0, entry.getKey()) + input.substring(entry.getKey() + 1))
              .stream()
              .map(s -> entry.getValue() + s))
      .collect(Collectors.toList());
}