Are all elements in a list null or data.frames?

Checks if A) `x` is a list, B) All elements in `x` are either null or data.frame.

Usage

is_all_list_elements_null_or_df(x)

Arguments

x

An object

Value

Boolean.

Examples

is_all_list_elements_null_or_df(data.frame())
#> [1] FALSE
is_all_list_elements_null_or_df(list(data.frame()))
#> [1] TRUE
is_all_list_elements_null_or_df(list(1, NULL))
#> [1] FALSE
is_all_list_elements_null_or_df(list(data.frame(), NULL))
#> [1] TRUE
is_all_list_elements_null_or_df(list("a"=1, 2))
#> [1] FALSE