Initial commit
Add bundler Gemfile
Initialize RSpec configuration and folder structure
Create our custom enumerable module and array class, as well as the blank spec for the methods to implement
Write the spec for the 'each' method
Write the implementation for the 'each' method
Use explicit block invocation in the implementation of the 'each' method
Write the spec for the 'select' method
Write the implementation for the 'select' method
Write the spec for the 'map' method
Write the implementation for the 'map' method
Write the spec for the 'inject' method
Write the implementation for the 'inject' method
Add a new spec for the 'inject' method in order to be aware of an initial value
Implement the new spec for the 'inject' method