Code
flatten(1)
Condition
Error in `flatten()`:
! `.x` must be a list, not a number.
Code
flatten_dbl(1)
Condition
Error in `flatten_dbl()`:
! `.x` must be a list, not a number.
Code
flatten(list(quote(a)))
Condition
Error in `flatten()`:
! `.x[[1]]` must be a vector, not a symbol.
Code
flatten(list(expression(a)))
Condition
Error in `flatten()`:
! `.x[[1]]` must be a vector, not an expression vector.
Code
flatten_lgl(1)
Condition
Error in `flatten_lgl()`:
! `.x` must be a list, not a number.
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