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Add possibility to use Perl-like regular expressions in matches()
iris$S <- 10
#> Error in grep(needle, haystack, ...): invalid regular expression '^s(?!e)', reason 'Invalid regexp'
I'm asking to add argument perl only and not ... as in #58
The text was updated successfully, but these errors were encountered:
[fix r-lib#71] add perl argument to matches()
Add perl argument to matches() (#98)
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