Ruby

ri
Ruby documentation through the ri CLI, and console.
On Ruby methods
A look on writing Ruby methods that reveal their intent.
Ruby Magic Comments
Ruby interpreter settings through comments.
Git gems
How to get Ruby gems from any git server.
Data Structure Basics pt.6
Strengths and weaknesses of some data structures.
Brief Intro to Algorithms pt.1
Notes on basic algorithm theory.
Data Structure Basics pt.5
Notes on tree data structures.