European Smalltalk User Group

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What are Objects?

• Objects are not abstract data-types
• Objects are
  • Unit of responsibility
  • Unit of behavior
• Furniture vs. Tamagashi classes
  • Furniture is a dead object
  • A tamagashi is a living object
  • It gets hungry, sleeps...
  • It reacts to messages

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• What are Objects?
• Smalltalk
• Lots of ready-to-use material
• Smalltalk Object Model
• Smalltalk Syntax on a Postcard
• One lookup: look in the class of the receiver
• What is the Essence of ...
• Antropomorphism
• Antropomorphism (II)
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• Iterators: Closures at Work
• The Design is in the System
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