dart-3-updates

To refactor if-else chains into switch expressions in Dart 3, replace conditional branching with switch statements and switch expressions using exhaustive handling and logical-or cases for clearer logic.

Modeling data with Dart 3 sealed classes and records involves choosing between reusable type-safe data structures, leveraging sealed hierarchies for exhaustive matching, and using records for structured value destructuring.

Destructuring lists, maps, records, and objects in Dart 3 uses pattern matching with if-case statements, guards, and nested patterns to bind values directly and simplify complex data extraction.

Migrating a pre-Dart-3 codebase to idiomatic Dart 3 patterns involves updating branching styles and data handling to use null-aware matching, exhaustive switches, and logical-or cases for safer maintainability.

Use sealed classes instead of records for data modeling in Dart 3 when you need exhaustive type hierarchies for exhaustive matching, whereas records suit simple, structured value destructuring without subtyping.