If you have nested parentheses, the solution is somewhat more complex: 
use 5.014;

my $s = "a (d (b) (e (f) ) ) c";
say remove_par($s);

sub remove_par {
    my ( $result, $open );
    foreach my $ch ( split // => shift ) {        
        $open++ if $ch eq '(';
        $open-- if $ch eq ')';
        $result .= $ch if !$open && $ch ne ')';
    }
    die "non-matching parentheses" if $open;
    return $result;
};

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In reply to Re: Remove text within parenthesis by jnyman
in thread Remove text within parenthesis by firmament

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