makandra is responsible for maintaining about 75 Ruby projects. These projects use a large number of different versions for Ruby...

Rails is our web framework. Goals Be able to write a simple Rails application. Understand how Rails talks to the...

Understand the differences between git diff and git diff --staged (or git diff --cached) Understand the difference between git...

Method lookup Understand all the terms in How Ruby method lookup works, in particular: include extend singleton class