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• 22:34, 26 November 2022 Will talk contribs created page Factory pattern (Created page with " = Basics = <blockquote> Given classes <code>Cat, Dog</code> that implement interface <code>Animal</code>,<br> We want a factory that chooses the desired pet. <syntaxhighlight lang="ruby"> module Animal interface! sig { abstract.returns(String) } def speak; end end class Cat include Animal sig { override.returns(String) } def speak "meow" end end class Dog include Animal sig { override.returns(String) } def speak "woof" end end </synta...")