Those things are all just Objects in Ruby, just with some syntactic sugar, not built in data types. `/a?/` is just syntactic sugar for `Regexp.new('a?')`, ['a',

Those things are all just Objects in Ruby, just with some syntactic sugar, not built in data types. `/a?/` is just syntactic sugar for `Regexp.new('a?')`, ['a','b','c'] is just `Array.[]( 'a', 'b', 'c')` everything is an object being sent messages.