On Wed, 12 Jun 2019 15:45:04 +1000
nevil amos <nevil.a...@gmail.com> wrote:
> # my desired desired output:
> # [1] "" "(B)" "(C)"
(function(s) regmatches(
s,
gregexpr('\\([^)]+\\)', s)
))(c("ABC","A(B)C","AB(C)"))
# [[1]]
# character(0)
#
# [[2]]
# [1] "(B)"
#
# [[3]]
# [1] "(C)"
This matches all substrings that start with an ( and are followed by
non-zero amount of non-) characters, then terminated by ). If there are
multiple such substrings, all are returned.
--
Best regards,
Ivan
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