What are the Enums in Flutter and How it is Used?
Flutter 3.0 is one of the long-awaited macOS and Linux platforms that gained stable features. These extensively allow for easily developing the app for running on any platform. Flutter 3.0 also comes with the majority of updates, especially enums. You can easily hire Flutter developer who is well versed in the enums for the Flutter projects.
Enums are enabled with ultimate power in the Flutter 3 or Dart 2.17. Built-in Flutter enums feature gives more options for implementing the added features. These are also an excellent way to handle a wide range of cases along with refactors Flutter 3.0.
What Are Enums in Flutter?
Enumerated types or Enums are the data type with the set of named values. These can be called members, elements, enumerators, or numerals. Enum also provides the Flutter engineers with the custom type restricted set of values.
It will be quite a convenient option for adding an integer to represent the set of values. Enum involves the type of data with predefined values. The Enum is the special class that is used for representing the fixed number of values in Dart. One of the simple examples of the Enum class is the enum Operating System { macOS, Windows, Linux}.
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Features Of Enums in Flutter
Normally, all the Enums extend with the Enum class, so these can be easily sealed. These do not involve the subclasses or are even implemented explicitly instantiated.
Abstract classes are also enabled with the mixins, which gives the absolute way of implementing or even extending the Enum. No objects will be implemented with the type of class or mixin.
- Allows the programmer to use a custom type
- Data type having a set of named values
- Variables are equal to one of the values
Flutter 3 provides complete support for the Universal Binaries. These Flutter application development would also extensively work along with adding more features such as the enums.
Before Flutter 3.0 was introduced, the Enums were used in the specific platform type that is built for the app. These can be extensively used for iOS devices to assure maximum stability.
Adding A Property To The Enums in Flutter
Normally, it is quite an efficient way to add a unique property for the Enums. Below are some of the popular options for creating extension methods.
extension OperatingSystemExtension on OperatingSystem {
bool switch (this) {
case OperatingSystem.macOS:
return true;
case OperatingSystem.windows:
case OperatingSystem.linux:
return false;
}
}
}
Moving the enum into the class is also added with the internal constructor. These would be delivering the constant gaining better stability for the “enum” values.
Most Flutter experts have been using this method to increase stability in the results. These play an important role in representing the fixed numbers for any constant value.
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Creating A Flutter Enum
The enumerated type will be displayed with the keyword called the “enum.” Usually, the Enum is not a unique feature across the Dart language, so they are used for various applications.
These also exist along with many other languages. You can also extensively develop the programmable interface with various techniques such as Flutter Enums. Below are examples of the Flutter Enums with rainbow colors. The enum could represent the data in the Dart.
enum MyColors {
red,
orange,
yellow,
green,
blue,
indigo,
violet
}
In Flutter, these are not defined with integer values. Inputting values is unnecessary with the Dart, so these can be extensively denoted as symbols along with an enumeration list. It is enabled with the integer value to assure the stability of the results.
Normally, the value of the first enumeration symbol used will be 0. These would especially denote an index on items that are used in Enum. It is quite a convenient option for running the code with an enum.
enum MyColors {
red,
orange,
yellow,
green,
blue,
indigo,
violet
}
void main() {
print(MyColors.values);
}
Upon displaying the Enums in Flutter, it will be enabled with better stability in achieving the results. The function can also take a value of the enum, so these are added with the value suitable for it.
The method also restricts various parameters on values added with an enum. These could be extensively passed values without the error. These errors could be added with the editor plugins.
// RESULT // [MyColors.red, MyColors.orange, MyColors.yellow, MyColors.green, MyColors.blue]
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Setting Values On Flutter Enum
You cannot set the value of the enum after the compilations. These are not listed for the mutable. The main reason is that they allow the developers to enable the Dart feature. The Dart enums will not be mutable structures, and these are suitable for attaining results with the value.
To get the values from the Enum in Flutter, you are required to set the appropriate value for the Enum in the Flutter. You can simply access the value for the enum in the Dart, so they are added with the specific property. These can also be added with an index on the value that you require.
enum MyColors {
red,
orange,
yellow,
green,
blue,
indigo,
violet
}
Enum with Values (Dart 2.17+)
Enums have a special class suitable for representing the fixed numbers in the Dart. These extensively have constant values especially added with declarations in a straightforward manner.
Enum classes are enabled with the Dart languages with the zero-based index. These can also be defined with an enum type, so they give better stability with the index value. You can also update the changes in the dart, as these would provide your enum with the custom values. For example, you have value for the Sedan = 0, SUV = 1, Truck = 2, then // enhanced enum will be constant class
enum CarType {
none("),
suv("ABC-1"),
sedan("CDE-2");
// can add more properties or getters/methods if needed
final String value;
// can use named parameters if you want
const CarType(this.value);
}
Adding the enums in Dart language becomes quite an efficient manner. These state the stability in accessing the storage type with the enum of CarType. These methods will represent the type of car that is available in the data. Normally, the Enums involve various properties, such as
enum OperatingSystem {
macOS(true, true),
windows(false, true),
Linux(false, true);
const OperatingSystem(this.canBuildForIos, this.canBuildForAndroid);
final bool canBuildForIos;
final bool canBuildForAndroid;
}
Enhanced Enum is quite similar to that of the normal class. These play a significant role in implementing the interface with the mixins in dart. Classes are also implemented based on the types and values with the enum declaration.
Conclusion
Usually, there are various methods the enums can be implemented in Flutter. These can also be a suitable option for overcoming fundamental enum limitations. With the recent changes in Flutter 3.0, it is convenient to use Enums for various applications. The enumeration in Dart will set the symbolic names so they can be set with constant values.
Therefore, Enums make your code more readable and can be used to restrict the range of values assigned to a variable. They can also provide a convenient way to map numbers to meaningful values. So, you can integrate the enum in Flutter depending on the requirements, and it is maintained by concentrating on the high-end documents.
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Frequently Asked Questions (FAQs)
1. What is the purpose of an enum?
An enum is a specific data type that enables a variable to be set to predefined constants. A variable must be equal to one of the values predefined for it. A typical example is compass direction and days of the week.
2. Why use an enum class in Flutter?
Enums are an essential part of programming languages. It helps the developers define the small set of a predefined set of values utilized across a logic they have built. Dart language, which is used to create Flutter, has limited functionality.
3. What are mixins in Flutter?
Mixins are a way of reusing the class code in multiple class hierarchies. Hence, to use a mixin, use the keyword followed by one or more mixin names.
4. Why use an enum rather than an array?
The array collects the various values, whereas the enum value is the simple one value. An array is used to iterate among several values using an index. An enum is assigned to some atomic value and iterated so that we can iterate the type.
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