combine_has_match_failed: Check for failed matches
Description
Provided with two equal length vectors, returns TRUE for indexes where both
entries are "NA" and FALSE otherwise.
Usage
combine_has_match_failed(number, body)
Arguments
number
A vector of address number(s). Integer or character string.
body
A character string vector of address body(/ies).
Value
A boolean vector: TRUE for indexes where both
number and body are "NA", FALSE otherwise.