colwise-filter.md
In dplyr: A Grammar of Data Manipulation

colwise filter() give meaningful errors

Code
  (expect_error(filter_if(mtcars, is_character, all_vars(. > 0))))
Output
  <error/rlang_error>
  Error in `filter_if()`:
  ! `.predicate` must match at least one column.
Code
  (expect_error(filter_all(mtcars, list(~ . > 0))))
Output
  <error/rlang_error>
  Error in `filter_all()`:
  ! `.vars_predicate` must be a function or a call to `all_vars()` or `any_vars()`, not a list.