>>>>> Lluís Revilla >>>>> on Tue, 12 Apr 2022 09:16:36 +0200 writes:
> Hi all, > This change is documented on the man page so I think it is intentional. yes, also if you look at the (svn) log messages of the code changes (or its git mirrors). >> From https://search.r-project.org/R/refmans/base/html/sets.html: > For union, a vector of a common mode. > For intersect, a vector of a common mode, or NULL if x or y is NULL. > For setdiff, a vector of the same mode as x. > Now the results are symmetrical to intersect( "foo", list()) indeed, and that *is* very desirable. > Probably it is worth mentioning in the NEWS as it was found to cause > some test to fail on a Bioconductor package some months ago. > This could affect other packages and analysis too. > Best, > Lluís I agree and have added an entry there ... still to be back ported to R 4.2.0 beta. Martin > On Tue, 12 Apr 2022 at 01:22, Gábor Csárdi <csardi.ga...@gmail.com> wrote: >> >> I wonder if this change is intentional, and if it is, whether it is >> worth mentioning in the NEWS. >> >> ❯ R-4.1 -q -e 'intersect(list(), "foo")' >> > intersect(list(), "foo") >> character(0) >> >> ❯ R-4.2 -q -e 'intersect(list(), "foo")' >> > intersect(list(), "foo") >> list() >> >> ______________________________________________ >> R-devel@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-devel > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel