CuisUniversity and DenotativeObjects by Hernan Wilkinson
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The document outlines the advantages and objectives of the Cuis Smalltalk environment for teaching object-oriented programming. It emphasizes direct object manipulation to aid learning while offering tools for debugging and inspection from the outset. Additionally, it highlights the availability of pre-installed packages and support for various platforms in a customized distribution aimed at educational institutions.
CuisUniversity and DenotativeObjects by Hernan Wilkinson
- 1. CuisUniversity Hernán A. Wilkinson @hernanwilkinson agile software development & services
- 2. Teaching OO/Smalltalk Challenges Class or Instance? To subclass or not to subclass Where is the code? How do I share it? “The image crashed!! I lost everything!!” What class should I use? There are so many!
- 3. Cuis • Advantages: • Small Easier to learn • Fast UI response is immediate • Stable Very important for non-Smalltalkers! • Simple code sharing File in/out or packages with Git • Navigation from UI Tools to model (Halos) Helps inspection and learning • 32/64 bits, Mac/Win/Linux support and RaspberryPi • Appropriable
- 4. CuisUniversity (https://sites.google.com/view/cuis-university/cuisuniversity?authuser=0) • Customized Cuis distribution created to teach OO at Universities • Dedicated Web Site • Support in Spanish • Simpler Installation (different files for 32/64 & win/mac/linux) • Pre-installed packages • Aconcagua • Chalten • Refactorings • DenotativeObjects
- 5. Aconcagua
- 7. Chalten
- 9. Refactoring https://github.com/hernanwilkinson/Cuis-Smalltalk-Refactoring (more are coming… Implemented with TDD)
- 10. Improved TDD tool support
- 12. DenotativeObjects https://github.com/hernanwilkinson/Cuis-Smalltalk-DenotativeObject • Objectives: • To help learning OO with direct object manipulation • Avoid class-instance differentiation at the beginning • Reinforce representation (modeling) • Reinforce encapsulation and cohesion • Similar tools to facilitate transition (similar browser, inspector, debugger, etc.) • Be able to debug and inspect from the beginning • Denotative: The denotation of a word is its explicit definition as listed in a dictionary • Connotative: Association or set of associations that a word usually brings to mind • Implementation: Use classes as DenotativeObjects © Name & Ideas by Máximo Prieto, Implementation & Ideas by Hernán Wilkinson, Ideas by Juan Vuletich and Sponsored by 10Pines
- 13. only objects auto created Direct object reference Embedded workspace Simplified and applied only to denotative objects
- 14. Special menus Immediate send, inspect and debug Simple code & object sharing
- 15. Object creation Object definition Object using sharing
- 16. Delegation to parent (no super ) Delegation without special keyword… Delegation sending different message
- 17. Direct send or execution of test
- 18. Assert (implemented using TDD with itself!)
- 19. Denotative object contexts only Steps only into denotative objects Behaves as Through
- 21. Achievements • Concrete manipulation of Objects • Immediate feedback of computation • Better understanding of Objects • Easy migration from DenotativeObject’s tools to Smalltalk’s tools • Inspection from day one • Debugging from day one • 49 hrs implementation investment! Cuis showed to be simple & powerful enough
- 22. agile software development & services ¡Gracias!