Enumerated Types (enums)
Explore how to define and use enumerated types, or enums, in Dart to manage fixed sets of constant values. Understand basic enums, exhaustive switch handling, and advanced enhanced enums that include custom properties and methods to support clean and reliable state management in applications.
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An enum, short for enumerated type, is a special kind of class in Dart. It is used to represent a fixed, limited set of constant values. When we create a variable and assign it an enum type, we restrict that variable so it can only ever hold one of the predefined values from that specific list. It cannot hold arbitrary data.
When to use enums
We use enums whenever our application handles data that has a small, specific, and predictable set of possible states.
Common real-world scenarios include:
Network states: connected, disconnected, or connecting.
UI themes: light mode, dark mode, or system default.
User roles: admin, editor, or viewer.
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