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my @hashrefs = map { foo => $_ }, 1..5;

        map {( "$foo$bar" => "barfoo" )} 1, ;      #no more syntax err
+or :-)
        map +( "$foo$bar" => "barfoo" ), 1, ;      #note unary + 
                                                   #to avoid "function
+-like" 
                                                   #interpretation of 
+()