generics Archives - Page 6 of 11

Nullable type as a generic parameter possible?

I want to do something like this : myYear = record.GetValueOrNull<int?>("myYear"), Notice the nullable type as the generic parameter. Since the GetValueOrNull function ...

May 13, 2022
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Why is “extends T” allowed but not “implements T”?

Is there a special reason in Java for using always “extends” rather than “implements” for defining bounds of type parameters? For example: public ...

May 13, 2022
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Check if a class is derived from a generic class

I have a generic class in my project with derived classes. public class GenericClass<T> : GenericInterface<T> { } public class Test : GenericClass<SomeType> ...

May 12, 2022
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What does “where T : class, new()” mean?

Can you please explain to me what where T : class, new() means in the following line of code? void Add<T>(T item) where ...

May 12, 2022
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Using Mockito to mock classes with generic parameters

Is there a clean method of mocking a class with generic parameters? Say I have to mock a class Foo<T> which I need ...

May 11, 2022
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Can’t operator == be applied to generic types in C#?

According to the documentation of the == operator in MSDN, For predefined value types, the equality operator (==) returns true if the values ...

May 10, 2022
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Method has the same erasure as another method in type

Why is it not legal to have the following two methods in the same class? class Test{ void add(Set<Integer> ii){} void add(Set<String> ss){} ...

May 7, 2022
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Java Generics With a Class & an Interface – Together

I want to have a Class object, but I want to force whatever class it represents to extend class A and implement interface ...

May 7, 2022
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Passing a single item as IEnumerable

Is there a common way to pass a single item of type T to a method which expects an IEnumerable<T> parameter? Language is ...

May 6, 2022
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Is there a constraint that restricts my generic method to numeric types?

Can anyone tell me if there is a way with generics to limit a generic type argument T to only: Int16 Int32 Int64 ...

May 6, 2022
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