Is this a class based on map? or maybe class with two types?
On a flutter example project I stumbled upon those lines:
abstract class BlocEvent extends Object {}
abstract class BlocState extends Object {}
abstract class BlocEventStateBase<BlocEvent, BlocState> {}
Is this a class based on map? or maybe class with two types?
What is the meaning of <BlocEvent, BlocState>?
dart
flutter asked Dec 30 '18 at 9:32
michaelbnmichaelbn
4,50712537
add a comment |
On a flutter example project I stumbled upon those lines:
abstract class BlocEvent extends Object {}
abstract class BlocState extends Object {}
abstract class BlocEventStateBase<BlocEvent, BlocState> {}
Is this a class based on map? or maybe class with two types?
What is the meaning of <BlocEvent, BlocState>?
dart
flutter asked Dec 30 '18 at 9:32
michaelbnmichaelbn
4,50712537
1
It's wrong code, no need to define abstract class BlocEvent,BlocState. The below is Generic class. The above BlocState & the below BlocState are not related at all
– yelliver
Dec 30 '18 at 11:00
@yelliver thx, good to know. Non the less, I still dont understand what is the meaning ofclass WhatEver<x, y> {}
– michaelbn
Dec 30 '18 at 13:24
add a comment |
On a flutter example project I stumbled upon those lines:
abstract class BlocEvent extends Object {}
abstract class BlocState extends Object {}
abstract class BlocEventStateBase<BlocEvent, BlocState> {}
Is this a class based on map? or maybe class with two types?
What is the meaning of <BlocEvent, BlocState>?
dart
flutter asked Dec 30 '18 at 9:32
michaelbnmichaelbn
4,50712537
On a flutter example project I stumbled upon those lines:
abstract class BlocEvent extends Object {}
abstract class BlocState extends Object {}
abstract class BlocEventStateBase<BlocEvent, BlocState> {}
Is this a class based on map? or maybe class with two types?
What is the meaning of <BlocEvent, BlocState>?
dart
flutter dart
flutter asked Dec 30 '18 at 9:32
michaelbnmichaelbn
4,50712537
asked Dec 30 '18 at 9:32
michaelbnmichaelbn
4,50712537
asked Dec 30 '18 at 9:32
michaelbnmichaelbn
4,50712537
asked Dec 30 '18 at 9:32
michaelbnmichaelbn
4,50712537
asked Dec 30 '18 at 9:32
michaelbnmichaelbn
4,50712537
4,50712537
1
It's wrong code, no need to define abstract class BlocEvent,BlocState. The below is Generic class. The above BlocState & the below BlocState are not related at all
– yelliver
Dec 30 '18 at 11:00
@yelliver thx, good to know. Non the less, I still dont understand what is the meaning ofclass WhatEver<x, y> {}
– michaelbn
Dec 30 '18 at 13:24
add a comment |
1
It's wrong code, no need to define abstract class BlocEvent,BlocState. The below is Generic class. The above BlocState & the below BlocState are not related at all
– yelliver
Dec 30 '18 at 11:00
@yelliver thx, good to know. Non the less, I still dont understand what is the meaning ofclass WhatEver<x, y> {}
– michaelbn
Dec 30 '18 at 13:24
1
1
It's wrong code, no need to define abstract class BlocEvent,BlocState. The below is Generic class. The above BlocState & the below BlocState are not related at all
– yelliver
Dec 30 '18 at 11:00
It's wrong code, no need to define abstract class BlocEvent,BlocState. The below is Generic class. The above BlocState & the below BlocState are not related at all
– yelliver
Dec 30 '18 at 11:00
@yelliver thx, good to know. Non the less, I still dont understand what is the meaning of
class WhatEver<x, y> {}– michaelbn
Dec 30 '18 at 13:24
@yelliver thx, good to know. Non the less, I still dont understand what is the meaning of
class WhatEver<x, y> {}– michaelbn
Dec 30 '18 at 13:24
add a comment |
1 Answer
1
active
oldest
votes
It's a generic type declaration, but as @yelliver pointed out, the example you posted is not correct, since BlocEvent and BlocState inside <> are just interpreted as generic type identifiers (unrelated to the classes with the same name).
This would make sense:
abstract class BlocEvent extends Object {}
abstract class BlocState extends Object {}
abstract class BlocEventStateBase<T extends BlocEvent, S extends BlocState> {}
Also, note that there are conventions for naming type parameters.
answered Dec 30 '18 at 14:11
Vinicius PintoVinicius Pinto
6,33033455
add a comment |
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It's a generic type declaration, but as @yelliver pointed out, the example you posted is not correct, since BlocEvent and BlocState inside <> are just interpreted as generic type identifiers (unrelated to the classes with the same name).
This would make sense:
abstract class BlocEvent extends Object {}
abstract class BlocState extends Object {}
abstract class BlocEventStateBase<T extends BlocEvent, S extends BlocState> {}
Also, note that there are conventions for naming type parameters.
answered Dec 30 '18 at 14:11
Vinicius PintoVinicius Pinto
6,33033455
add a comment |
It's a generic type declaration, but as @yelliver pointed out, the example you posted is not correct, since BlocEvent and BlocState inside <> are just interpreted as generic type identifiers (unrelated to the classes with the same name).
This would make sense:
abstract class BlocEvent extends Object {}
abstract class BlocState extends Object {}
abstract class BlocEventStateBase<T extends BlocEvent, S extends BlocState> {}
Also, note that there are conventions for naming type parameters.
answered Dec 30 '18 at 14:11
Vinicius PintoVinicius Pinto
6,33033455
add a comment |
It's a generic type declaration, but as @yelliver pointed out, the example you posted is not correct, since BlocEvent and BlocState inside <> are just interpreted as generic type identifiers (unrelated to the classes with the same name).
This would make sense:
abstract class BlocEvent extends Object {}
abstract class BlocState extends Object {}
abstract class BlocEventStateBase<T extends BlocEvent, S extends BlocState> {}
Also, note that there are conventions for naming type parameters.
answered Dec 30 '18 at 14:11
Vinicius PintoVinicius Pinto
6,33033455
It's a generic type declaration, but as @yelliver pointed out, the example you posted is not correct, since BlocEvent and BlocState inside <> are just interpreted as generic type identifiers (unrelated to the classes with the same name).
This would make sense:
abstract class BlocEvent extends Object {}
abstract class BlocState extends Object {}
abstract class BlocEventStateBase<T extends BlocEvent, S extends BlocState> {}
Also, note that there are conventions for naming type parameters.
answered Dec 30 '18 at 14:11
Vinicius PintoVinicius Pinto
6,33033455
answered Dec 30 '18 at 14:11
Vinicius PintoVinicius Pinto
6,33033455
answered Dec 30 '18 at 14:11
Vinicius PintoVinicius Pinto
6,33033455
answered Dec 30 '18 at 14:11
Vinicius PintoVinicius Pinto
6,33033455
6,33033455
add a comment |
add a comment |
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1
It's wrong code, no need to define abstract class BlocEvent,BlocState. The below is Generic class. The above BlocState & the below BlocState are not related at all
– yelliver
Dec 30 '18 at 11:00
@yelliver thx, good to know. Non the less, I still dont understand what is the meaning of
class WhatEver<x, y> {}– michaelbn
Dec 30 '18 at 13:24