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NoSuchMethod in dart?


NoSuchMethod in dart?

By : Selva Dhinakaran
Date : November 22 2020, 04:01 AM
seems to work fine According to the official docs for invoking an unimplemented method, you have to satisfy one of the following points:
The receiver has the static type dynamic. The receiver has a static type that defines the unimplemented method (abstract is OK), and the dynamic type of the receiver has an implemention of noSuchMethod() that’s different from the one in class Object.
code :
class Person {
  @override  //overring noSuchMethod
    noSuchMethod(Invocation invocation) => 'Got the ${invocation.memberName} with arguments ${invocation.positionalArguments}';
}

main(List<String> args) {
  dynamic person = new Person(); // person is declared dynamic hence staifies the first point
  print(person.missing('20','shubham'));  //We are calling an unimplemented method called 'missing'
}
class Person {
  missing(int age,String name);

  @override //overriding noSuchMethod
    noSuchMethod(Invocation invocation) => 'Got the ${invocation.memberName} with arguments ${invocation.positionalArguments}';
}

main(List<String> args) {
  dynamic person = new Person(); //person could be var, Person or dynamic
  print(person.missing(20,'shubham')); //calling abstract method
}


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Get Line Highlighting (or at Least a Stack Trace) for noSuchMethod Exception Dart

Get Line Highlighting (or at Least a Stack Trace) for noSuchMethod Exception Dart


By : ideate
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further In Tools > Preferences > Run and Debug you can change the policy for Breaking on exceptions. By selecting all the editor will break on every exceptions and you will be able to see stacktraces in the debugger panel.
Dart, how does noSuchMethod work with mixins?

Dart, how does noSuchMethod work with mixins?


By : Sandipan Roy
Date : March 29 2020, 07:55 AM
hop of those help? When you make a mixin application with multiple mixins, like with A, B, C, they are applied in order. That means that the superclass of Object with A, B, C is Object with A, B, and the noSuchMethod of C is overriding the ones mixed in from A and B.
NosuchMethod in dart for JSON.decode

NosuchMethod in dart for JSON.decode


By : Alexey Vasilyev
Date : March 29 2020, 07:55 AM
help you fix your problem Firstly, when importing the dart:convert library you are giving it an alias called JSON. Which means you would have to use it like;
code :
JSON.JSON.decode(jsonString);
final jsonAsString = new File('./text.json').readAsString().then(print);
final jsonAsString = new File('./text.json').readAsStringSync();
print(jsonAsString);
final json = JSON.decode(jsonAsString);
print('$json');
new File('./text.json').readAsString().then((String jsonAsString) {
  print(jsonAsString);
  final json = JSON.decode(jsonAsString);
  print('$json');
});
Flutter: I have changed the Dart entrypoint to Login.dart , while building apks error shows that lib\main.dart not found

Flutter: I have changed the Dart entrypoint to Login.dart , while building apks error shows that lib\main.dart not found


By : user3371059
Date : March 29 2020, 07:55 AM
Any of those help C:\flutter\flutter_windows_v1.9.1+hotfix.2-stable\flutter\bin\flutter.bat --no-color build apk Target file "lib\main.dart" not found. Process finished with exit code 1 , You can set an entry point like this:
code :
flutter run --target=lib/Login.dart
flutter build apk --target=lib/Login.dart
In Dart, how do I get code completion when using noSuchMethod?

In Dart, how do I get code completion when using noSuchMethod?


By : ZyborgJames
Date : March 29 2020, 07:55 AM
may help you . I'd like to use noSuchMethod to reduce boilerplate when writing a lot of similar methods. But then the API is worse for my library's users because code completion no longer works. I tried this but I get warnings about unimplemented methods: , The trick is to define the API in a separate class:
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