--- collect {|item| ... }
--- map {|item| ... }

    ǤФƥ֥åɾ̤ƴޤ֤ޤ

    ֥åά硢

        obj.collect {|item| item}

    Ԥޤ Enumerable#to_a [Enumerable/to_a] Ʊ
    

