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Pharo in a Nutshell: A Dummy’s Guide to Smalltalk Programming
- Alan Kay, known for coining the term 'Object Oriented Programming,' envisioned encapsulated mini-computers communicating via message passing inspired by biological systems.
- Smalltalk was developed by Alan Kay, Dan Ingalls, Adele Goldberg, and others at Xerox PARC, emphasizing messaging over objects themselves in OOP.
- Object-oriented programming essentials include message passing, encapsulation, and dynamic binding, with a focus on dynamic behavior rather than class hierarchies.
- Smalltalk evolved from Smalltalk-71 to Smalltalk-80, with the latter becoming widely known for its minimal syntax and focus on message passing.
- In Smalltalk, everything is an object, including control structures implemented as methods, emphasizing pure object-oriented principles.
- Objects in Smalltalk can hold state, receive messages, and send messages, with message passing being the core mechanism for computation.
- Pharo is a modern Smalltalk implementation, emphasizing the importance of understanding message passing for effective Smalltalk programming.
- Pharo provides a user-friendly interface with components like the Playground, Transcript, and Class Browser for writing, displaying output, and managing classes respectively.
- Smalltalk's message passing philosophy in Pharo differs from popular OOP languages, reflecting its pure object-oriented nature and adherence to Alan Kay's vision.
- This summary provides a foundational understanding of Smalltalk, message passing, and the unique approach to programming in Pharo.
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