count.md
In forcats: Tools for Working with Categorical Variables (Factors)

validates its inputs

Code
  fct_count(1)
Condition
  Error in `fct_count()`:
  ! `f` must be a factor or character vector, not a number.
Code
  fct_count("x", sort = 1)
Condition
  Error in `fct_count()`:
  ! `sort` must be `TRUE` or `FALSE`, not the number 1.
Code
  fct_count("x", prop = 1)
Condition
  Error in `fct_count()`:
  ! `prop` must be `TRUE` or `FALSE`, not the number 1.