util_extract_matches function

return all matches of an expression

util_extract_matches(data, pattern)

Arguments

• data: a character vector
• pattern: a character string containing a regular expression

Returns

A list with matching elements or NULL (in case on non-matching elements)

Examples

## Not run:
 # not exported, so not tested
dat0 <- list("a sentence with citation (Ref. 12), (Ref. 13), and then (Ref. 14)",
  "another sentence without reference")
pat <- "Ref. (\\d+)"
util_extract_matches(dat0, pat)
## End(Not run)

See Also

Stack Overflow

Other process_functions: util_abbreviate(), util_all_is_integer(), util_attach_attr(), util_bQuote(), util_backtickQuote(), util_coord_flip(), util_par_pmap(), util_setup_rstudio_job(), util_suppress_output()

Author(s)

Josh O'Brien