Confident Ruby Notes

notes.md

Confident Ruby Notes

Chapter 1 – Introduction

Four parts of a method

1. Collecting input
2. Performing work
3. Delivering output
4. Handling failures

Methods should group these parts together and in that particular order. When these parts of a method are mixed-up, it causes extra congnitive overload (like trying to read a choose your own adventure book from start to end).

Chapter 2 – Performing Work

• A fundamental feature of OOP is sending messages (SM)

Basics to writing maintanable code

1. Identify the messages to perform a task
2. Identify the roles that receive those messages
3. Map those roles onto existing objects.

• Roles are duck types
• Switch statement smell