Learn how to create simple Domain-Specific Languages (DSLs) in Kotlin for configuration and data handling, using the builder pattern and lambdas with receiver. This approach enables you to write more expressive, reusable, and maintainable code.

Discover how to define classes, constructors, and methods in JavaScript, and explore their practical applications in web development, mobile app development, and desktop application development. Learn key concepts such as how to create instances of classes, define properties and methods, and implement Object-Oriented Programming principles.

Writing unit tests for Flask applications and debugging using built-in tools is crucial for ensuring the reliability and maintainability of your code. This topic covers the basics of writing unit tests for views, models, and APIs, as well as debugging using the pdb module.