This is a follow up to this question, Restricted access for allocated arrays belonging to separate object, after discovering that returning by value across compilation units doesn't help to hint th...

Feature for deserializing Generic Classes was introduced to freeze a few months back. I am trying to follow the documentation, but I am facing a compile time error: The argument type 'NameOfClass F...

I have a Collection, I'm trying to use the Distinct method to remove duplicates. public static Collection<MediaInfo> imagePlaylist imagePlaylist = imagePlaylist.Distinct(new API.MediaInfoCo...

I've searched and have found answers that make sense when you have access to change an existing interface definition. In my case, I do not have that ability. I'm trying to create a new object with ...

Imagine I have the following struct: type MyGeneric[T string | int] struct { } I want to check whether the generic used to instantiate that struct was a string or a int when creating a new MyGener...

I can't figure out why I need a 'static bound in one case (bar) and not the other (baz): fn f<T>(_input: T) -> bool { false } fn bar<T>() -> Box<dyn Fn(T) -> bool + 'stati...

I am very new to TypeScript. My TypeScript version is 3.7.5. IMHO, it should be very easy, but I don't know why it does not work. function add<T> (a:T, b:T):T { return a + b ; } console.log...

It's incredibly impossible to find things for FreePascal because all searches end up at some sort of Delphi related site. Is there a built-in Dictionary object? This page references "TDictionary...

I know that in Java generics when using a type parameter with multiple bounds,the compiler erases the type information to "the leftmost bound" (i.e. the first class/enum or interface that's on the ...

I want to write my enum with custom attributes, for example: public enum SomeEnum: long { [SomeAttribute<MyClass1>] Sms = 1, [SomeAttribute<MyClass2>] Email = 2 } but attributes ...

a variable annotated with Type[C] may accept values that are classes themselves How do you do this with TypeVarTuples (PEP 646) from typing import TypeVar, TypeVarTuple T = TypeVar("T") ...

Crashes in Firebase Crashlytics appear with a note how to fix a problem: Fatal Exception: java.lang.IllegalStateException: TypeToken must be created with a type argument: new TypeToken<...>()...

I'm running PHPStan on a Symfony project where I have the following relation in a Doctrine entity: /** * @ORM\OneToMany(targetEntity="App\Entity\Course\Slide", mappedBy="chapter", cascade={"persi...

My type annotations I currently have look similar to the following, and I want to use an typing alias to not repeat myself so much: A class has class variables, which can be either: some specified...

I want to implement a function that loops over the properties of an object and applies updates to another object of the same type. interface Car { tires: number; name: string; } function updateC...

I have this class structure (simplified): public class InducingMedium { public required string File { get; set; } } public class InducingVideo : InducingMedium {} public class InducingAudio : Ind...

Assume you have a Python class that inherits from Generic[T]. Is there any way to get a hold of the actual type passed in from within the class/instance? For example, from typing import TypeVar, Ty...

Does C# offer some nice method to cast a single entity of type T to IEnumerable<T>? The only way I can think of is something like: T entity = new T(); IEnumerable<T> = new List { enti...

I have a JSON string and I created a function which parses this JSON as an object using Scala case class. I wrote the below code to parse it in a generic way. However, It gave me an error: def get...

In C# 8 with nullable enabled, is there a way to identify a nullable reference type for generic type? For nullable value type, there is a section dedicated to it. https://learn.microsoft.com/en-us...

I'm using Entity Framework 5 and have a generic repository, within which are several methods like the two Get() methods below: public TEntity GetById(int id) { return DbSet.Find(id); } public TE...

I am trying to refactor my code using the IntelliJ idea extension called sonarLint. In there, sonarLint suggests further modification like this picture below(I have marked the issue in red) SonarLi...

I've stared to use spring's @EventListener annotation to create event handlers that handle my non-spring specific events. Initially everything went pretty well. I used a test to verify that I could...

I want to add typing to a Python function that takes in a type as an argument (actually, a subtype of a specific class), and return an instance of that type. Think a factory that takes in the speci...

Suppose we have an interface with a single generic method: public interface IExtender { T GetValue<T>(string tag); } and a simple implementation A of it that returns instances of two diff...