Welcome! Today, we focus on writing maintainable and scalable software through Code Decoupling and Modularization. We will explore techniques to minimize dependencies, making our code more modular, manageable, and easier to maintain using TypeScript.

Decoupling ensures our code components are independent by reducing the connections among them. Consider the following TypeScript example:

In the coupled code, calculateArea performs multiple operations, calculating areas for different shapes. In the decoupled code, we split these operations into independent functions, leading to cleaner code.

Conversely, modularization breaks down a program into manageable units or modules.

Code dependencies occur when one part of the code relies on another part to function. In tightly coupled code, these dependencies are complex, making management and maintenance difficult. By employing decoupling and modularization, we reduce dependencies, leading to cleaner, more organized code.

Consider the following scenario in an e-commerce application: