On Thu, 19 Jun 2025 at 15:27, Simone Ivan Conte <[email protected]> wrote: > > 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.
According to the Javadoc [1], CollectionUtils.collate expects the collections to be sorted. That is not the case for the second List, which is presumably why the assertion fails. [1] https://commons.apache.org/proper/commons-collections/apidocs/org/apache/commons/collections4/CollectionUtils.html#collate(java.lang.Iterable,java.lang.Iterable,boolean) > 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) --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
