Instruction: Discuss the differences between Namespaces and Modules in TypeScript and provide examples on when to use each.
Context: This question assesses the candidate's knowledge of code organization in TypeScript, particularly the use of Namespaces and Modules, and their ability to apply these concepts in a scalable application structure.
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TypeScript, as a superset of JavaScript, introduces several powerful features for organizing code, two of which are Namespaces and Modules. The distinction between them primarily hinges on their scope and modularity. Let me clarify the differences before diving into when to use each.
Namespaces, historically known as "internal modules", are TypeScript's way of grouping logically related code blocks, functions, interfaces, classes, etc., under a named scope. This is particularly useful in a scenario where your application doesn't require multiple modules or when you're working within a single file. Namespaces are compiled down to a single JavaScript file, making them ideal for small to medium projects where namespace pollution is a concern but external module loading isn't necessary. For example, in a TypeScript project where all components are closely related and will be used within the same environment, namespaces can encapsulate all related functionalities neatly....