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║ ║ class ║ module ║
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║ instantiation ║ can be instantiated ║ can *not* be instantiated ║
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║ usage ║ object creation ║ mixin facility. provide ║
║ ║ ║ a namespace. ║
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║ superclass ║ module ║ object ║
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║ methods ║ class methods and ║ module methods and ║
║ ║ instance methods ║ instance methods ║
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║ inheritance ║ inherits behaviour and can║ No inheritance ║
║ ║ be base for inheritance ║ ║
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║ inclusion ║ cannot be included ║ can be included in classes and ║
║ ║ ║ modules by using the include ║
║ ║ ║ command (includes all ║
║ ║ ║ instance methods as instance ║
║ ║ ║ methods in a class/module) ║
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║ extension ║ can not extend with ║ module can extend instance by ║
║ ║ extend command ║ using extend command (extends ║
║ ║ (only with inheritance) ║ given instance with singleton ║
║ ║ ║ methods from module) ║
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