assertive (version 0.1-7)

assert_is_a_non_empty_string: Is the input of type character?

Description

Checks to see if the input is of type character.

Usage

assert_is_a_non_empty_string(x)

  assert_is_a_string(x)

  assert_is_an_empty_string(x)

  assert_all_are_numeric_strings(x)

  assert_any_are_numeric_strings(x)

  assert_all_strings_are_missing_or_empty(x)

  assert_any_strings_are_missing_or_empty(x)

  assert_all_strings_are_not_missing_nor_empty(x)

  assert_any_strings_are_not_missing_nor_empty(x)

  assert_is_character(x)

  is_a_non_empty_string(x, .xname = get_name_in_parent(x))

  is_a_string(x, .xname = get_name_in_parent(x))

  is_an_empty_string(x, .xname = get_name_in_parent(x))

  is_missing_or_empty_character(x)

  is_not_missing_nor_empty_character(x)

  is_numeric_string(x)

  is_character(x, .xname = get_name_in_parent(x))

Arguments

x

Input to check.

.xname

Not intended to be used directly.

Value

• is_character wraps is.character, providing more information on failure. is_a_string returns TRUE if the input is character and scalar. is_an_empty_string returns TRUE if the input is "". is_numeric_string is vectorised, returning TRUE when the inputs are not NA after conversion to character and then numeric. is_missing_or_empty_string is also vectorised, returning TRUE when the input is "" or NA. The assert_* functions return nothing but throw an error if the corresponding is_* function returns FALSE.

See Also

is.character and is_scalar.

Examples

assert_is_character(letters)
assert_is_a_string("foo bar baz")
assert_is_an_empty_string("")
assert_all_are_numeric_strings(c("1", "2.3", "-4.5", "6e7", "8E-9"))
assert_any_are_numeric_strings(c("1", "Not a number"))
assert_all_strings_are_missing_or_empty(c("", NA))
assert_any_strings_are_missing_or_empty(c("a", NA, "b"))