Description Usage Arguments Value See Also Examples
Match function
1 2 3 4 5 6 7 8 |
data |
character vector to match against |
pattern |
regular expression to use for matching |
global |
use global matching |
options |
regular expression options |
locations |
rather than returning the values of the matched (or
captured) string, return a |
... |
options passed to regexpr or gregexpr |
if no captures, returns a logical vector the same length as the
input character vector specifying if the relevant value matched or not. If
there are captures in the regular expression, returns a data.frame
with a
column for each capture group. If global
is TRUE
, returns a
list of data.frame
s.
regexp
Section "Perl-like Regular Expressions" for a
discussion of the supported options
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | string <- c("this is a", "test string")
re_matches(string, rex("test")) # FALSE FALSE
# named capture
re_matches(string, rex(capture(alphas, name = "first_word"), space,
capture(alphas, name = "second_word")))
# first_word second_word
# 1 this is
# 2 test string
# capture returns NA when it fails to match
re_matches(string, rex(capture("test")))
# 1
# 1 test
# 2 <NA>
|
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