const in Flutter | ليش Flutter بطّل يطالبك فيها؟

لسنين الـ lint كان يطلع تنبيه على كل widget ناقصها const. وبإصدار flutter_lints 5.0.0 شالوا هالـ lints من الإعدادات الافتراضية. فهل const كانت كذبة، ولا القصة أعمق؟ بهالحلقة هنفوت بداخل Dart وFlutter لحتى نشوف شو بتعمل const فعليا. وبعدين هنقرأ الـ issue اللي شالت الـ lints، وشو طلع بالقياس على تطبيق حقيقي. Links: Introducing package:flutter_lints: https://docs.flutter.dev/release/brea... flutter_lints — Changelog: https://pub.dev/packages/flutter_lint... dart-lang/core # 833 — Remove the annoying const lints from flutter_lints: https://github.com/dart-lang/core/iss... flutter/flutter # 149932 — Investigate constness: https://github.com/flutter/flutter/is... flutter/flutter PR # 148261 — const vs. non-const widget build benchmark: https://github.com/flutter/flutter/pu... Dart — Final and const: https://dart.dev/language/variables#f... identical() — Dart API: https://api.dart.dev/dart-core/identi... Dart diagnostics — const_with_non_const: https://dart.dev/tools/diagnostics/co... Dart VM — Garbage Collection: https://github.com/dart-lang/sdk/blob... Flutter docs — Performance best practices: https://docs.flutter.dev/perf/best-pr... Element.updateChild — Flutter API: https://api.flutter.dev/flutter/widge... Widget.operator == — Flutter API: https://api.flutter.dev/flutter/widge... StatefulWidget — Performance considerations: https://api.flutter.dev/flutter/widge... AnimatedBuilder — Performance optimizations: https://api.flutter.dev/flutter/widge... #flutter #flutterdev #programming #dart #const #final #widget #element