Hello, This is my first time writing to this mailing list. I hope it is the right one to reach out the Apache Commons community.
I was looking at the use of CollectionUtils.collate and there is an option to NOT include duplicates: var collated = CollectionUtils.collate(List.of("a", "b"), List.of("b", "a"), false); assertThat(collated) .containsExactly("a", "b"); At least that is my understanding. However the test above fails, as the item "a" is not identified as a duplicate. I would be more than happy to look at this issue and contribute myself to a fix, but wanted to reach out first to make sure this is an issue in the first place or I have just misinterpreted the javadocs. Thanks and best regards, Simone (sic2)