Using split "regex" does backslash interpretation first. Then when the regex is compiled, it sees m/(, |\p=n-\)/ with the right parenthesis escaped. Use split /regex/ instead.

You should avoid using a quoted string as the first parameter to split, except for the special split " " form. It leads to people forgetting that it's actually a regex and doing split "|", etc. (though that's not quite what you've run into).

In reply to Re: small help with map function by ysth
in thread small help with map function by nganesh

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