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Flutter - why do they instantiate the class and then throw that instance away?

CounterService._internal(); Is a private named constructor that creates an object and can be called only within the class (privacy). factory CounterService.instance() => _instance; Is a public named...

Tags: Flutter, dart, service

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Android - How to get success or error data without folding the response while using fpdart in flutter?

I mostly create extension for this. extension EitherExt on Either { ///! use only after checking the type get asLeft => (this as Left).value; get asRight => (this as Right).value; } And you can...

Tags: android, Flutter, dart

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Adding a Future<String> to a NotifierProvider in flutter app?

Instead of Future clientId= firestoreService.saveNewClient(toMap(newClient); Await the future use this to get the unboxed future: String? clientId = await firestoreService.saveNewClient(toM...

Tags: Flutter, dart

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Flutter - Exception caught by gesture: type 'double' is not a subtype of type 'Double' in type cast?

I think you have mistakenly written Double instead of double change this line of code cart.addItem(product.id, product.price as Double, product.title); to this cart.addItem(product.id, product.price...

Tags: Flutter, dart

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Flutter/Dart: A simple data stream required?

I don't see why you would need a stream at all. a simple onDoubleTap: () => setState(() => board[row][col].currentHealth -= 1), might be all you need

Tags: Flutter, dart

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Adding Column as child to Container in flutter is not working. How to solve it?

Try wrapping the Container in Scaffold. @override Widget build(BuildContext context) { return Scaffold( body: Container( child: Center( child: Column( mainAxisAlignme...

Tags: Flutter, dart

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flutter column inside scaffold not accounting for top bar?

you should use SafeArea like this: @override Widget build(BuildContext context) { return Scaffold( body: SafeArea( Column( children: [ Container( height: 50...

Tags: Flutter, dart

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flutter ClipRect has no borderRadius property?

I think you are looking for ClipRRect which has borderRadius property.

Tags: Flutter, dart

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flutter build apk running error migrating cause?

To solve this the easy ways is to delete the android folder in your project and run flutter create . command in project directory and add any you have previously done in the android folder like permis...

Tags: Flutter, dart, gradle

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Flutter - The argument type 'Null' can not be assigned to the parameter type 'String'. (argument_type_not_assignable)?

First of all, you need to learn what the null safety is. If you create some variables with ?, that is nullable variable, so that variable can receive null. For example, if you create variable like thi...

Tags: Flutter, dart

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