Question

I have a hash table with multiple values being passed to a function I dont know the names of the keys but i know that the values of the keys must be equal to characters A S or X.
How can i easily check that all values in the hash table are equal to those characters?

Answer 1

NullUserException is good, you could also

match_values = %w(A S X)
hash.values.all? { |value| match_values.include?(value) }