Question

I have a hash, whose values are true or false. What is the most Ruby-esque way to see if all the values of a given sub-hash of this hash are the same?

h[:a] = true 
h[:b] = true 
h[:c] = true 
h[:d] = false
[h[:a], h[:b], h[:c]].include? false 
[h[:a], h[:b], h[:c]].include? true  

Is there a better way to write this?

Answer 1

values_at is the method to get a collection of values out of a Hash:

h.values_at(:a,:b,:c).all?  #are they all true?
h.values_at(:a,:b,:c).any?  #is at least one of them true?
h.values_at(:a,:b,:c).none? #are they all false?