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"R".match(%r[^R]) finds a match.
I don’t know much about regex but I thought ^ after a [ negates the character class, the characters between the brackets.
What am I missing?
in your case brackets are not part of regex, your case is similar to
%r|^R|or%r'^R'or place any character before%and afterRwhat you want is
%r|[^R]|or/[^R]/