util_extract_matches: return all matches of an expression

In dataquieR: Data Quality in Epidemiological Research

return all matches of an expression

Description

return all matches of an expression

Usage

util_extract_matches(data, pattern)

Arguments

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

Value

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

Author(s)

Josh O'Brien

See Also

Stack Overflow

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

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)

dataquieR documentation built on May 29, 2024, 7:18 a.m.