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Flutter constructor optional parameters

How do you make a parameter optional in a constructor?

1 April 2022 Enpatika.com Genel

keyword is used in the argument to make it optional for the constructor . All the optional arguments of a constructor should be placed after all the mandatory arguments only in a constructor.

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Can you have a constructor with no parameters?

1 April 2022 Enpatika.com Genel

A constructor that takes no parameters is called a parameterless constructor . Parameterless constructors are invoked whenever an object is instantiated by using the new operator and no arguments are provided to new .

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Can you have a constructor with no parameters?

1 April 2022 Enpatika.com Genel

A constructor that takes no parameters is called a parameterless constructor . Parameterless constructors are invoked whenever an object is instantiated by using the new operator and no arguments are provided to new .

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How many types of optional parameters are in Dart?

1 April 2022 Enpatika.com Genel

Dart has two types of optional parameters: named and positional. Before I discuss the differences, let me first discuss the similarities. Dart’s optional parameters are optional in that the caller isn’t required to specify a value for the parameter when calling the function.

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Can we override default value of parameter?

1 April 2022 Enpatika.com Genel

Override Default Values. This is not allowed and results in a compiler error. Overriding functions cannot specify default values for their parameters . Kotlin requires that default values can only be specified in the base class functions.

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How many types of optional parameters are in flutter Dart?

1 April 2022 Enpatika.com Genel

Dart has two types of optional parameters: named and positional.

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Can we give default value in function with optional positional parameter?

1 April 2022 Enpatika.com Genel

OptionalAttribute parameters do not require a default value .

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