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10. `measure` now supports user-specified `cols` argument, which can be useful to specify a subset of columns to `melt`, without having to use a regex, [#5063](https://github.com/Rdatatable/data.table/issues/5063). Thanks to @UweBlock and @Henrik-P for reporting, and @tdhock for the PR.
11. `setcolorder()` gains `skip_absent` to drop columns that aren'tpresent, [#6044, #6068](https://github.com/Rdatatable/data.table/pull/6044). Default behavior (`skip_absent=FALSE`) remains unchanged, i.e. unrecognized columns result in an error. Thanks to @sluga for the suggestion and @sluga & @Nj221102 for the PRs.
11. `setcolorder()` gains `skip_absent` to ignore unrecognized columns (i.e. columns included in `neworder` but not present in the data), [#6044, #6068](https://github.com/Rdatatable/data.table/pull/6044). Default behavior (`skip_absent=FALSE`) remains unchanged, i.e. unrecognized columns result in an error. Thanks to @sluga for the suggestion and @sluga & @Nj221102 for the PRs.
