In dart language, How to initialize default value for Generic type variable?

[Ashok Kuvaraja]

 How to initialize default value for Generic type variable?   

   class RangeValuePair<T>
   {
      T _value ;
      RangeValuePair(int start)
      {
         this._value = ?(how to define) ;
      } 
   }

[Suzuki Tomohiro]

Here you are: https://stackoverflow.com/questions/42864913/how-do-i-initialize-a-final-class-property-in-a-constructor

RangeValuePair(int start): _value = dosomething;

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[Ashok Kuvaraja]

Hi, 

     Thank you for your response. I need to set the default value of generic type in runtime. In c#, default(T) function can use to set the default value of generic type in runtime. I need to perform this action in dart language. How to initialize?

On Wednesday, March 18, 2020 at 7:19:26 PM UTC+5:30, Suzuki Tomohiro wrote:

Here you are: https://stackoverflow.com/questions/42864913/how-do-i-initialize-a-final-class-property-in-a-constructor

RangeValuePair(int start): _value = dosomething;

On Wed, Mar 18, 2020 at 8:59 AM Ashok Kuvaraja <kuvara...@gmail.com> wrote:

 How to initialize default value for Generic type variable?   

   class RangeValuePair<T>
   {
      T _value ;
      RangeValuePair(int start)
      {
         this._value = ?(how to define) ;
      } 
   }

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[tomohiro suzuki]

I don’t think of the solution. If you cannot tell the concrete type, you don’t know the initial value. Curious; what is your logic in C#?

Sent from my iPad

On Mar 19, 2020, at 1:40 AM, Ashok Kuvaraja <kuvara...@gmail.com> wrote:



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[Terje A. Bergesen]

In C# all types have a default value. Objects and strings are null. Numbers tend to be zero etc. So, if you have a generic type in C#, you can always do

var t = default(T);

The run-time environment knows what the default value of whatever T is and it sets it accordingly.

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--

Terje A Bergesen - te...@bergesen.info

"Vae, puto deus fio" -- Vespasian, not his last words though

[Tom Gilmour]

Maybe this is the Dart code you're looking for?

class RangeValuePair<T>{
T _value;

//Constructor
RangeValuePair(this._value);

// getter
get value {return this._value;}

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