is_valid_lc_call {libbib}

Check if LC Call Number is valid

Description

Takes a string representation of a Library of Congress call number and returns either TRUE or FALSE based on whether or not the input fits the canonical LC Call Number pattern

Usage

is_valid_lc_call(x, allow.bare = FALSE)

Arguments

x

A Library of Congress call number (string)

allow.bare

A logical indicating whether an LC Call with only the letters should be considered valid (default is FALSE)

Value

Returns either TRUE or FALSE based on whether the call number is valid

Examples

is_valid_lc_call("Q172.5.E77")
# TRUE
is_valid_lc_call("AF172.5.E77")
# FALSE

# vectorized
is_valid_lc_call(c("Q 172.5", "AF172", "PR6023.A93"))
# TRUE FALSE TRUE