Write an Interpreter in Ruby

Summary

we need three things: • A w a y to communic a te with our host l a ngu a ge. We will c a ll it the Object System • https://github.com/M a rioAri a sC/pep a /blob/m a in/lib/objects.rb • Where to store v a lues a nd their scopes, e.g. Identi f iers, p a r a meters. We will c a ll it the Environment • The ev a lu a tor, in our c a se, is a Tree-W a lking ev a lu a tor • https://github.com/M a rioAri a sC/pep a /blob/m a in/lib/ev a lu a tor.rb 15