Welcome! Today, we'll delve into Maps, a data structure that organizes data as key-value pairs, much like a treasure box with unique labels for each compartment. Imagine dozens of toys in a box. If each toy had a unique label (the key), you could directly select a toy (the value) using the label. No rummaging is required — that's the power of Maps! In this lesson, we'll understand Maps and learn how to implement them in TypeScript.

TypeScript implements Maps through the Map class. They hold data in key-value pairs with type safety. Let's create a Map, functioning as a catalog for a library:

In this Map, book1, book2, and book3 are keys, while the book titles serve as their respective values. The keys and values both specify types, ensuring type safety. Both keys and values are allowed to be of any type within typescript (primitives, objects, arrays and functions).