After changing focus from Ruby to functional languages recently I've found that optional types can be really helpful in a lot of situations. Ruby also has anot

After changing focus from Ruby to functional languages recently I've found that optional types can be really helpful in a lot of situations. Ruby also has another popular and mature library that I am surprised nobody has mentioned yet named 'Contracts.ruby' https://github.com/egonSchiele/contracts.ruby https://github.com/egonSchiele/contracts.ruby This syntax is also more appealing to my eyes than what rdl provides. Contract Num => Num def double(x) x * 2 end