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This guide aims to help software developers think more clearly about how to build systems that are not only functional today but maintainable into the future. It focuses on three architectural “ilities”: readability, reusability, and refactorability, presenting them in a hierarchical framework so developers can evaluate and improve their code and system design. The project uses a simple shopping-cart application written in JavaScript and React/Redux to illustrate how code evolves from “bad” via “better” to “good” across those three dimensions. By examining common smells—poor naming, deep nesting, long functions, tight coupling—readers learn how to restructure code to improve maintainability. It is targeted at developers of any experience level, though beginners will find its concrete examples especially useful. The tutorial-style repository includes code with comments and comparisons between less readable and more readable versions, promoting intentional design.
Features
- Structured exploration of readability, reusability, and refactorability
- Worked example application (JavaScript + React/Redux) showing “bad” → “good” code
- Code walkthroughs highlighting naming, function size, nesting, coupling issues
- Clear mental model for thinking about architecture rather than blueprint for a system
- Practical guidelines on naming, arguments, module boundaries, dependencies
- Free, open-source under MIT license for wide adoption
Project Samples
