Error inferring build function type during bloc testing - flutter

Couldn't infer type parameter 'B'.
Tried to infer 'CounterCubit?' for 'B' which doesn't work:
Type parameter 'B' is declared to extend 'BlocBase' producing 'BlocBase<_>'.
The type 'CounterCubit?' was inferred from:
Parameter 'build' declared as 'B Function()'
but argument is 'CounterCubit? Function()'.
Consider passing explicit type argument(s) to the generic.

Related

how do I solve this flutter problem The argument type 'dynamic Function(Map<String, bool>)' can't be assigned to the parameter type 'void Function()?'

The argument type 'dynamic Function(Map<String, bool>)' can't be assigned to the parameter type 'void Function()?'
was trying to pass a function of type Map<String, bool> to a function()

Couldn't infer type parameter 'T'. when using Map.reduce(max)

I want to get the max value from a List. But since i migrated to null safety my code doesnt work anymore:
weightChart = [45.3, 21.5, 521.3];
weightChart.reduce(max)
I get the error:
Couldn't infer type parameter 'T'. Tried to infer 'double?' for 'T' which doesn't work: Type
parameter 'T' is declared to extend 'num' producing 'num'. The type 'double?' was inferred from:
Function type declared as 'T Function<T extends num>(T, T)' used where 'double? Function(double?,
double?)' is required. Consider passing explicit type argument(s) to the generic.

Let's try
import 'dart:math';
void main() {
List<double> weightChart = [45.3, 21.5, 521.3];
print(weightChart.reduce(max));
}

Flutter Problem about Constructor return type

The constructor returns type 'dynamic' that isn't of expected type 'Widget'.dart(invalid_cast_new_expr)

Argument type '{directives: any[];}' is not assignable to parameter of type 'NgModule'

I am getting this error:
Argument type '{directives: any[];}' is not assignable to parameter of type 'NgModule'
Here is a screenshot:

Cannot convert value of type 'UIImage?' to expected argument type 'UIView'

Cannot convert value of type 'UIImage?' to expected argument type
'UIView' to expected argument type 'UIView'

Try with this:
ScrollView1.addSubview(imageView)
Basically, You are adding the image instance in the scrollView but the required param is a type of UIVIew and the image wrapper is UIImageView so you need to add the wrapper not the image directly.