gistfile1.rb

module AutoParams
    def auto_set(params={})
        params.each_pair do |key,value|
            self.instance_eval("@#{key} = '#{value}'")
        end
    end
end


class Human
    attr_reader :first, :last

    include AutoParams
    def initialize(params={})
        auto_set(params)
    end
end

d = Human.new(:first => 'Michal', :last => 'Kurek')
pp d.inspect

# "#<Human:0x168aa50 @first=\"Michal\", @last=\"Kurek\">"