Check if an argument is named

Check if an argument is named

checkNamed(x, type = "named")

check_named(x, type = "named")

assertNamed(x, type = "named", .var.name = vname(x), add = NULL)

assert_named(x, type = "named", .var.name = vname(x), add = NULL)

testNamed(x, type = "named")

test_named(x, type = "named")

Arguments

x

[any]
Object to check.

type

[character(1)]
Select the check(s) to perform. “unnamed” checks x to be unnamed. “named” (default) checks x to be named which excludes names to be NA or empty (""). “unique” additionally tests for non-duplicated names. “strict” checks for unique names which comply to R's variable name restrictions. Note that for zero-length x every name check evaluates to TRUE.

.var.name

[character(1)]
Name of the checked object to print in assertions. Defaults to the heuristic implemented in vname.

add

[AssertCollection]
Collection to store assertion messages. See AssertCollection.

Value

Depending on the function prefix: If the check is successful, the functions

assertNamed/assert_named return

x invisibly, whereas

checkNamed/check_named and

testNamed/test_named return

TRUE. If the check is not successful,

assertNamed/assert_named

throws an error message,

testNamed/test_named

returns FALSE, and checkNamed/check_named

return a string with the error message. The function expect_named always returns an

expectation.

Note

These function are deprecated and will be removed in a future version. Please use checkNames instead.

See also

Other attributes: checkClass(), checkMultiClass(), checkNames()

Examples

x = 1:3
testNamed(x, "unnamed")
#> [1] TRUE
names(x) = letters[1:3]
testNamed(x, "unique")
#> [1] TRUE