@varkoly You might want to try yourself in `irb`

I've omitted `[s]` in this example as this `s` key always exists, because it comes from the `each_key` loop.

    locilka@bestie:~> irb
    irb(main):001:0> @params = {}
    => {}
    irb(main):002:0> puts "There was something" if @params['a']
    => nil
    irb(main):003:0> puts "There was not anything" if ! @params['a']
    There was not anything
    => nil
    irb(main):004:0>