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flutter make parameters of a class optional

Isijola Ademie answered on February 20, 2023 Popularity 9/10 Helpfulness 2/10

answer flutter make parameters of a class optional

related flutter optional parameter

flutter make parameters of a class optional

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class TextInputWithIcon extends StatefulWidget {
  final String iconPath;
  final String placeHolder;
  final Function(bool)? onFocusChange; // nullable and optional
  
  const TextInputWithIcon(
      {Key? key,
      required this.iconPath, // non-nullable and required
      this.placeHolder = "", // non-nullable but optional with a default value
      this.onFocusChange, // nullable and optional
      })
      : super(key: key); 

  @override
  _TextInputWithIconState createState() => _TextInputWithIconState();

}

https://levelup.gitconnected.com/3-types-of-dart-parameters-and-using-them-correctly-61d4204d53a5#69be

Popularity 9/10 Helpfulness 2/10 Language javascript

Source: stackoverflow.com

Tags: class flutter parameters whatever

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Contributed on Feb 20 2023

Isijola Ademie

0 Answers Avg Quality 2/10

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flutter optional parameter

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void greet(String name, {String prefix = 'Hello'}) {
  print('$prefix, $name!');
}

void main() {
  greet('Alice'); // Output: Hello, Alice!
  greet('Bob', prefix: 'Hi'); // Output: Hi, Bob!
}

Popularity 9/10 Helpfulness 1/10 Language dart

Source: Grepper

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Contributed on Sep 11 2023

YOU.com

0 Answers Avg Quality 2/10

flutter make parameters of a class optional

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