Dart Singleton Pattern

In this tutorial we will learn what singleton is, when to use singleton pattern and how to implement singleton in Dart.

_______________________________________________

_______________________________________________

** -------------------------------------------------------------------------------- **
Let's get connected

[thongjoon]

Clear and simple as singleton. Thank you.

[nawalhussein]

This was very clear! Thank you very much. This helped me.

[bipbipbop]

thank you; and how should I do to create a database access with this singleton?

[kasandrop]

I would appreciate if you redo the video with dart type safety feature.

[santoshneupane]

Amazing Video .... Is there a video on dependency injection & flutter app architecture by you...

[orjihvy]

Not sure why but I could not get your example to work but overall excellent video, especially the first half. I duplicated the code below from my Dartpad:

void main() {
final singleton = Singleton._instance;
print(singleton.name);
}

class Singleton {
String name;
static Singleton _instance;

Singleton._internal() {
name = "Singleton Pattern";
}

static Singleton get instance {
if (_instance == null) {
_instance = Singleton._internal();
}
return _instance;
}
}

The error I got was: Uncaught TypeError: Cannot read property 'get$name' of nullError: TypeError: Cannot read property 'get$name' of null

[rohitshukla]

Hi man, please hide your face its not important, code is important