add example of a module that uses a callback to extend the class its being added to
Merge branch 'master' of github.com:nirds/Advanced-Ruby-3-Day-Class
sample code for beginning to see concurrency effects
update stackprof example
add stub #self.types on Monster
fix typo in Monster class
day 3 code
add resources
collection practice
code from day 3
updated materials
update answers
working enumerable