This PR contains 4 new helper functions for dplyr-join functions:
_(1) argumentscheck() and _(2) set_colnames() use existing pieces of code and aim at reducing repetitions, while _(3) newunmatched keys() and (4) _process_byvector() have been developed from scratch, to make the option unmatched = "error" work as it should.
It also contains the necessary adjustments to the *_join functions and corresponding tests.
This PR contains 4 new helper functions for dplyr-join functions: _(1) argumentscheck() and _(2) set_colnames() use existing pieces of code and aim at reducing repetitions, while _(3) newunmatched keys() and (4) _process_byvector() have been developed from scratch, to make the option
unmatched = "error"
work as it should. It also contains the necessary adjustments to the *_join functions and corresponding tests.