Check List — chk_list • chk

Checks if is a list using

is.list(x)

Usage

chk_list(x, x_name = NULL)

vld_list(x)

Arguments

x: The object to check.
x_name: A string of the name of object x or NULL.

Value

The chk_ function throws an informative error if the test fails or returns the original object if successful so it can used in pipes.

The vld_ function returns a flag indicating whether the test was met.

Functions

vld_list(): Validate List

See also

Other chk_typeof: chk_character_or_factor(), chk_character(), chk_count(), chk_double(), chk_environment(), chk_factor(), chk_integer(), chk_logical()

Examples

# chk_list
chk_list(list())
try(chk_list(1))
#> Error in eval(expr, envir, enclos) : `1` must be a list.
# vld_list
vld_list(list())
#> [1] TRUE
vld_list(list(x = 1))
#> [1] TRUE
vld_list(mtcars)
#> [1] TRUE
vld_list(1)
#> [1] FALSE
vld_list(NULL)
#> [1] FALSE