fritools (version 3.3.0)

is_of_length_zero: Is an Object of Length Zero?

Description

Some expressions evaluate to integer(0) or the like.

Usage

is_of_length_zero(x, class = NULL)

Arguments

x

The object.

class

An optional character vector of length 1 giving the class. See examples.

Value

TRUE on success, FALSE otherwise.

See Also

Other logical helpers: get_run_r_tests(), is_batch(), is_cran(), is_false(), is_force(), is_installed(), is_not_false(), is_null_or_true(), is_r_cmd_check(), is_r_package_installed(), is_running_on_fvafrcu_machines(), is_running_on_gitlab_com(), is_success(), is_version_sufficient(), is_windows()

Examples

# NOT RUN {
x <- ""; length(x); is_of_length_zero(x)
x <- grep(" ", "")
print(x)
is_of_length_zero(x)
is_of_length_zero(x, "character")
is_of_length_zero(x, "numeric")
is_of_length_zero(x, "integer")
# }