lukew244 / Ruby-class-methods

Ruby class methods workshop.

Class methods

Learning objectives

• Understand that class method belongs to a class object
• Understand how class methods are used in the Builder pattern
• Understand how class methods are used to persist information
• Understand why class methods should not be overused

Assignment

• Investigate object properties of classes in pry;
• Read through team.rb. Understand the usage of the class method as Builder;
• Implement build method in the Team class to build a team from a list of players. The method should validate passed arguments: a roller derby team should have a jammer and 4 blockers one of whom is a pivot;
• Refactor the Team class to store team name in a class method;

Further reading

• "Design Patterns", Chapter 3, Builder
• "Design Patterns in Ruby", Chapter 14
• This blog post

These two chapters cover the Builder pattern, but not in relation to class methods.