garydgregory commented on a change in pull request #91: Add drain method to CollectionUtils URL: https://github.com/apache/commons-collections/pull/91#discussion_r339282776
########## File path: src/main/java/org/apache/commons/collections4/CollectionUtils.java ########## @@ -1791,6 +1791,63 @@ public static int maxSize(final Collection<? extends Object> coll) { return list; } + /** + * Removes elements whose index are between startIndex and endIndex in the collection and returns them. + * This method would have the side-effect of modifying the input collections. + * + * @param <E> the type of object the {@link Collection} contains + * @param input the collection will be operated,can't be null + * @param startIndex the start index to remove element,can't be less than 0 + * @param endIndex the end index to remove,can't be less than startIndex + * @return collection of elements that removed from the input collection + */ + public static <E> Collection<E> removeRange(Collection<E> input, int startIndex, int endIndex) { + if (endIndex < startIndex) { + throw new IllegalArgumentException("The start index can't less than the end index."); Review comment: This message is backward. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services