9. Flutter Enum

   What is enum ?

   • Enum in dart is enumerated, iterable
   • Enum is used for defining named constant values.

   How to use ?

   • Synstax

   enum PlatformEnum {
       android, ios, windown
   }
   

   • Iterate over enum values

   PlatformEnum.values.forEach((value) => print('value: $value, index: ${value.index}'));
   

   • Extension enum

   extension PlatformEnumExtension on PlatformEnum {
       String? get title {
           switch …

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10. Flutter Buttons

    ElevatedButton

    ElevatedButton(
      onPressed: () {},
      child: Text('Button'),
      style: ElevatedButton.styleFrom(shape: StadiumBorder()),
    )
    
    shape types: RoundedRectangleBorder / StadiumBorder / CircleBorder / BeveledRectangleBorder
    

    OutlinedButton

    OutlinedButton(
        onPressed: () {},
        child: Text('Button'),
        style: OutlinedButton.styleFrom(
            shape: StadiumBorder(),
        ),
    )
    

    TextButton:

    • You can always use TextButton if you don't want an outline or color fill.
    • Don't forget, there's also an .icon constructor …

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11. (Regex) Detect urls in string

    Easy done:

    (http|ftp|https):\/\/([\w_-]+(?:(?:\.[\w_-]+)+))([\w.,@?^=%&:\/~+#-]*[\w@?^=%&\/~+#-])
    

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