# head_while and tail_while require predicate function Code head_while(1:3, ~NA) Condition Error in `head_while()`: ! `.p()` must return a single `TRUE` or `FALSE`, not `NA`. --- Code tail_while(1:3, ~ c(TRUE, FALSE)) Condition Error in `tail_while()`: ! `.p()` must return a single `TRUE` or `FALSE`, not a logical vector.
Generated by dwww version 1.15 on Thu Jun 20 14:12:12 CEST 2024.