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RubyConf 2019 - Less abstract! Surprising effects of expressing rules of OOP in pictures by Ivan Nemytchenko Abstractions are both our blessing and our curse. Because of them, we're so powerful. But also we so often fall into the trap of miscommunication :( Abstract rules, operating with abstract terms, built on top of other abstract ideas. Ugh... In this talk, we're going to build a visual language to make things LESS ABSTRACT. We'll see how it helps in: refactoring messy code tracking codebase changes teaching others explaining non-obvious concepts #rubyconf2019 #confreaks
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In his talk titled "OOP in Pictures" at RubyConf 2019, Ivan Nemytchenko explores the challenges of teaching and understanding Object-Oriented Programming (OOP) concepts due to their inherent abstraction. He outlines how visual representations can bridge the gap between high-level concepts and concrete code, ultimately making it easier for learners to grasp complex ideas. The talk is structured into three parts: establishing a foundation for the visual language, explaining advanced concepts, and applying these ideas in practical scenarios. **Key Points Discussed:** - **Abstract Nature of Programming:** The discussion begins with the importance of recognizing the difficulty in communicating abstract concepts, noting the frequent misalignment in understanding among programmers. Traditional tools like UML are not widely adopted or effective, highlighting the need for a more intuitive approach. - **Artistic Soldiers Method:** As a pedagogical tool, Ivan introduces the "Artistic Soldiers Method," where students must develop an electric kettle without code. This method encourages students to visualize roles and responsibilities, fostering a deeper understanding of class and method interactions. - **Visualizing Methods and Classes:** The talk uses analogies to illustrate how methods and arguments interact. For example, methods are depicted as hands with varying numbers of fingers, representing the number of arguments they can accept. Private methods are likened to internal arms, showing their restricted access. - **Design Patterns and Issues:** Ivan illustrates common design issues using visual representations, such as a hand with too many fingers indicating methods that are overly complex. This approach aids in diagnosing structural problems in code. - **Advanced Concepts:** The visualization of polymorphism demonstrates how methods across different objects can hold similar characteristics. Classes are represented as blueprints guiding object creation and behavior. - **Dependency Injection:** The process of managing dependencies in methods is illustrated by visual metaphors like holes in arms, emphasizing the importance of their management for effective programming practices. - **Refactoring with Visualizations:** Towards the conclusion, Ivan demonstrates how these visual tools can facilitate code refactoring, transforming chaotic representations into simplified ones, thereby fostering a clearer understanding of code structure. **Conclusions and Takeaways:** - Ivan emphasizes the practical utility of the developed visual language, which aids in teaching programming principles and documenting processes. While the models may not be perfect, they serve as effective tools for enhancing comprehension and communication in software development. For those interested in further exploration, Ivan invites the audience to engage with additional resources related to his "Painless Rails" project.
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