Seems roughly appropriate (thinking in zero-values): nil.to_i => 0 nil.to_s => "" nil.to_a => [] nil.to_h => {} nil.to_set # error; nil.to_a.to_set =

Seems roughly appropriate (thinking in zero-values): nil.to_i => 0 nil.to_s => "" nil.to_a => [] nil.to_h => {} nil.to_set # error; nil.to_a.to_set => #<Set: {}>