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Arrays and tuples are essential for working with collections in TypeScript. While arrays hold multiple values of the same type, tuples allow you to work with fixed-length arrays where each position has a specific type. This guide covers array types, readonly patterns, tuple best practices, and practical examples that you'll use in real applications. Learn how to leverage TypeScript's type system for safer, more maintainable collection handling.

TypeScript's type system starts with fundamental building blocks: primitive types like string, number, and boolean, along with arrays and type annotations. Understanding these basic types is essential for writing type-safe code. This comprehensive guide walks you through each primitive type, shows you how to use type annotations effectively, and teaches you best practices for working with arrays and basic data structures in TypeScript.

The TypeScript compiler (tsc) is the engine that transforms your TypeScript code into JavaScript. Understanding how it works, what happens during compilation, and how to leverage features like watch mode will make you a more effective TypeScript developer. This guide demystifies the compilation process and shows you how to optimize your workflow with the TypeScript compiler.