Ruby Pattern Get Started
Pattern for Pattern
Separate what it changes and what it doesn’t change
Make programs of interface, not implemented
Inheritance >> Aggregation
Delegation you do
Get Started
- Inheritance
- Aggregation
- Delegation
Inheritance
Extends basic class
class Vehicle def start_engine end def stop_engine end end
Add features
class Car < Vehicle def sunday_drive start_engine stop_engine end end [/ruby] <h3>Aggregation</h3> [ruby] class Engine def start end def stop end end class Car def initialize @engine = Engine.new end def sunday_drive @engine.start @engine.stop end end
Delegation
You did it! I ask you to do it!
class AKB def initialize @staff = Staff.new end def makeup @staff.makeup end def switch_to_super @staff = SuperStaff.new end def prepare @staff.prepare end end
class Staff def makeup end def prepare end end
Staff did all things
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