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singleton in dart

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Anurag Sah answered on April 12, 2020 Popularity 9/10 Helpfulness 4/10

answer singleton in dart

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singleton in dart

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class FileSystemManager {
  static final FileSystemManager _instance = FileSystemManager._internal();
 
  // using a factory is important
  // because it promises to return _an_ object of this type
  // but it doesn't promise to make a new one.
  factory FileSystemManager() {
    return _instance();
  }
  
  // This named constructor is the "real" constructor
  // It'll be called exactly once, by the static property assignment above
  // it's also private, so it can only be called in this class
  FileSystemManager._internal() {
    // initialization logic 
  }
  
  // rest of class as normal, for example:
  void openFile() {}
  void writeFile() {}
}

Popularity 9/10 Helpfulness 4/10 Language dart

Source: flutterbyexample.com

Tags: dart singleton

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Contributed on Oct 01 2022

Anurag Sah

0 Answers Avg Quality 2/10

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flutter singleton

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class Singleton {
  static final Singleton _instance = Singleton._internal();

  factory Singleton() => _instance;

  Singleton._internal();
}

// Whenever you need to get the singleton, call its factory constructor, e.g.:
//   var singleton = Singleton();
//
// You'll always get the same instance.

Popularity 10/10 Helpfulness 10/10 Language dart

Source: stackoverflow.com

Tags: dart

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Contributed on Apr 12 2020

Jumpy Monkey

0 Answers Avg Quality 2/10

singleton classes in dart example

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class Singleton {
  static Singleton _instance;

  Singleton._internal() {
    _instance = this;
  }

  factory Singleton() => _instance ?? Singleton._internal();
}

Popularity 9/10 Helpfulness 6/10 Language dart

Source: Grepper

Tags: dart

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Contributed on May 30 2021

Elated Eland

0 Answers Avg Quality 2/10

flutter singleton

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class Singleton {
  static final Singleton _singleton = Singleton._internal();

  factory Singleton() {
    return _singleton;
  }

  Singleton._internal();
}

Popularity 10/10 Helpfulness 4/10 Language dart

Source: Grepper

Tags: dart

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Contributed on Feb 21 2021

Kind Kinkajou

0 Answers Avg Quality 2/10

dart singleton

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main() {
  var s1 = Singleton();
  var s2 = Singleton();
  print(identical(s1, s2));  // true
  print(s1 == s2);           // true
}

Popularity 9/10 Helpfulness 1/10 Language dart

Source: stackoverflow.com

Tags: dart

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Contributed on Jul 22 2022

Jishnu P

0 Answers Avg Quality 2/10

singleton in dart

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