Welcome! Are you ready to dive deep into simple data structures using TypeScript? To aid our journey, we'll explore the utility of TypeScript's Map, a key-value pair data structure that caters to a diverse range of data types.

A TypeScript Map is an efficient repository of unique key-value pairs, mirroring JavaScript's Map feature. However, TypeScript enhances this feature by enforcing types for keys and values.

Generics in TypeScript are used to create a Map to specify the types of keys and values it will hold, ensuring type safety. This way, the compiler can check that all keys and values added to the map are of the correct type.

Here's how we create and populate a Map in TypeScript:

In real-world scenarios, you might need a Map to be more flexible. For instance, what if some celestial bodies are identified by their name (a string) and others by a catalog ID (a number)?

In TypeScript, you can use with the pipe () symbol to allow multiple types for keys or values: