Constructor Detail

• CollectionUtils

  CollectionUtils()

Method Detail

• some

   static <E> boolean some(@NonNull() Collection<E> collection, @NonNull() Function1<E, Boolean> filter)

  Check whether any element of the collection passes the filter

  Returns:

  True if condition is true for any element in the collection

• every

   static <E> boolean every(@NonNull() Collection<E> collection, @NonNull() Function1<E, Boolean> filter)

  Check whether all elements of the collection pass the filter

  Returns:

  True if condition is true for all elements in the collection

• find

  @Nullable() static <E> E find(@NonNull() Collection<E> collection, @NonNull() Function1<E, Boolean> filter)

  Find the first element which passes the filter

  Returns:

  Element if found, otherwise null

• findLast

  @Nullable() static <E> E findLast(@NonNull() Collection<E> collection, @NonNull() Function1<E, Boolean> filter)

  Find the last element which passes the filter

  Returns:

  Element if found, otherwise null

• findIndex

   static <E> int findIndex(@NonNull() List<E> list, @NonNull() Function1<E, Boolean> filter)

  Find the index of the first element which passes the filter

  Returns:

  Index if found, otherwise -1

• findLastIndex

   static <E> int findLastIndex(@NonNull() List<E> list, @NonNull() Function1<E, Boolean> filter)

  Find the index of the last element which passes the filter

  Returns:

  Index if found, otherwise -1

• filter

  @NonNull() static <E> List<E> filter(@NonNull() Collection<E> collection, @NonNull() Function1<E, Boolean> filter)

  Returns a new Array containing only the elements which passed the filter

  Returns:

  Filtered Collection

• map

  @NonNull() static <E, R> List<R> map(@NonNull() Collection<E> collection, @NonNull() Function1<E, R> transform)

  Returns a new Array containing the results of the transform function for all elements

  Returns:

  Filtered Collection

• removeIf

   static <E> boolean removeIf(@NonNull() Collection<E> collection, @NonNull() Function1<E, Boolean> filter)

  Removes all elements from the collection which pass the filter

  Returns:

  Whether an element was removed

• partition

   static <E> Pair<List<E>, List<E>> partition(@NonNull() Collection<E> collection, @NonNull() Function1<E, Boolean> filter)

  Partition the collection into two Arrays. The first array has all elements which passed the filter, the second one has the rest

  Returns:

  A Pair containing the two arrays

• splice

   static <E> List<E> splice(List<E> list, int start)

  Removes all elements after the specified start index

  Returns:

  The removed elements

• splice

  @SafeVarargs() static <E> List<E> splice(List<E> list, int start, int deleteCount, Array<E> items)

  Removes the specified amount of elements after the specified start index and inserts the specified items

  Parameters:

  list - The list of splice

  start - The start index

  deleteCount - The amount of items to remove

  items - The items to insert

  Returns:

  The removed elements