http://www.perlmonks.org?node_id=954789


in reply to Re^2: Using Number Ranges in a Dispatch Table
in thread Using Number Ranges in a Dispatch Table

No need to double up on the parentheses 
    (map { $_ => 2 } 'B','C'),
    (map { $_ => 3 } 'D','E'),

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In Section Seekers of Perl Wisdom