Dart Generic All In One

Dart Generic All In One

Dart 泛型

https://dart.dev/guides/language/language-tour#generics

/**
 *
 * @author xgqfrms
 * @license MIT
 * @copyright xgqfrms
 * @created 2019-01-01
 *
 * @description
 * @augments
 * @example
 *
 */

void main() {
  dynamic d;
  print("d default = $d");
  print("\n");
  d = 1;
  print("d num = $d");
  d = "str";
  print("d string = $d");
  d = true;
  print("d bool = $d");
  // 泛型 generic
  var list = new List<dynamic>();
  print("\n");
  print("list = $list");
  list.add(1);
  list.add('hello');
  list.add(true);
  print("list = $list");
}

/*

d default = null

d num = 1
d string = str
d bool = true

list = []
list = [1, hello, true]

 */

Flutter Generics

https://flutter.dev/docs/release/breaking-changes/parent-data-widget-generic-type

TypeScript Generics

https://www.typescriptlang.org/docs/handbook/generics.html

function identity(arg: number): number {
  return arg;
}

function identity(arg: any): any {
  return arg;
}

<T> T

function identity<T>(arg: T): T {
  return arg;
}

refs

https://api.dart.dev/stable/2.9.1/dart-core/Invocation/Invocation.genericMethod.html

https://stackoverflow.com/questions/59677862/how-to-create-objects-of-generic-types-in-flutter-dart

https://stackoverflow.com/questions/53365051/usage-of-generics-in-flutter-dart

https://dart.academy/generics-in-dart-and-flutter

Chrome 黑科技, hash query text & selected text highlight

https://dart.academy/generics-in-dart-and-flutter/#:~:text=Flutter code uses Dart generics,one%2C while remaining type safe.

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xgqfrms 2012-2020

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