Answer: Use the typeof operator If you want to check whether a variable has been initialized or defined (i.e. test whether a variable has been declared and assigned a value) you can use the typeof operator.
Read moreHow do you avoid late initialization in Flutter?
How to Solve Error? Remember: You have to assign something to the late variable before using it . Here, we have created a nullable variable, which is assigned to the Text() widget, When you use Text(name!) null check operator instead shown like above, you may get “Null check operator used on a null value” Error.
Read moreHow do you make a widget loop in Flutter?
“for loop widget flutter” Code Answer’s
Read moreHow do you make a widget loop in Flutter?
“for loop widget flutter” Code Answer’s
Read moreHow do I know if a widget is visible in a viewport?
print(‘Widget is visible in the viewport at position: $yPosition’); // do stuff… } else { print(‘Widget is not visible. ‘); // do stuff… }27 Haz 2018
Read moreIs visible widget a Flutter?
Flutter Visibility Widget Visibility is a widget that is useful to show or hide other widgets in flutter . We have to wrap the widget we want to show or hide inside the visibility widget as a child. This widget has a property called visible which controls the state (visible or invisible) of the child.
Read moreWhich of the following is ternary operator?
Answer: In computer programming, ?: is a ternary operator that is part of the syntax for basic conditional expressions in several programming languages.
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