A set of predicates and assertions for checking the properties of strings. Most of the documentation is on the assertive page. End-users will usually want to use assertive directly.
To install the stable version, type:
install.packages("assertive.strings")To install the development version, you first need the devtools package.
install.packages("devtools")Then you can install the assertive.strings package using
library(devtools)
install_bitbucket("richierocks/assertive.strings")is_empty_character, is_non_empty_character,
is_missing_or_empty_character, and
is_non_missing_nor_empty_character check for empty and
missing (or not) character vectors.
is_an_empty_string, is_a_non_empty_string,
is_a_missing_or_empty_string, and
is_a_non_missing_nor_empty_string do the same, for single
strings.
is_numeric_string checks for strings that contain
numbers.
is_single_character checks for single characters.
is_matching_fixed, is_matching_regex,
is_not_matching_fixed, and
is_not_matching_regex all check whether a string matches a
pattern or not.
Predicates that return a vector have two corresponding assertions.
For example, is_numeric_string has
assert_all_are_numeric_strings and
assert_any_are_numeric_strings.
Predicates returning a single logical value have one corresponding
assertion. For example, is_an_empty_string has
assert_is_an_empty_string.
character_to_list_of_integer_vectors converts a
character vector of numbers to a list of integer vectors.