In this chapter, we will cover the following recipes:
- Using Symbol to create a local instance
- Using Symbol.for to create a global instance
- Using Symbol to simulate enums
- Setting and deleting entries from Map
- Creating a Map from the existing data
- Creating a class that wraps Map to work with specific complex types
- Setting and deleting entries from WeakMap
- Creating a WeakMap from existing data
- Creating a class that uses WeakMap to work with specific complex types
