gistfile1.rb

def test(x, get_user_ids, get_user_ids)
    get_user_ids.call(x) do | y |
        get_user_ids.call(y)
    end
end

def get_user_ids x
    for i in 1 .. 5
        yield x * i
    end
end

def print_user_ids y
    puts y
end


test(2, method(:get_user_ids), method(:print_user_ids))