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Recent questions tagged polymorphism

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polymorphism - Private virtual method in C++

What is the advantage of making a private method virtual in C++? I have noticed this in an ... createElement(const AtomicString& tagName, ExceptionCode&); }; Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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polymorphism - Vector of objects belonging to a trait

Consider the following code: trait Animal { fn make_sound(&self) -> String; } struct Cat; impl Animal ... calls the corresponding trait method on each element? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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polymorphism - Pure virtual destructor in C++

Is it wrong to write: class A { public: virtual ~A() = 0; }; for an abstract base class? At least that compiles in MSVC... Will it crash at run time? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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polymorphism - Why do we need virtual functions in C++?

I'm learning C++ and I'm just getting into virtual functions. From what I've read (in the book and ... I just can't find a straightforward answer online. Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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polymorphism - What is the formal name for RTTI information, vtables etc. stored in a polymorphic type in C++?

From [intro.object] (emphasis mine): Some objects are polymorphic ([class.virtual]); the implementation generates ... name-for-rtti-information-vtables-etc-stored-in-a-polymorph...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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690 views

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polymorphism - Handle single-column custom polymorphic relation in Laravel

I'm trying to get a polymorphic relation to work against a table that has the relation defined in ... questions/65860816/handle-single-column-custom-polymorphic-relation-in-laravel...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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polymorphism - static vs dynamic heterogeneous collection in rust

I'm brand new to rust so all the lifetimes are probably wrong, please ignore. Assume that the objects ... .com/questions/65903095/static-vs-dynamic-heterogeneous-collection-in-rust...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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468 views

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polymorphism - Why can't you reduce the visibility of a method in a Java subclass?

Why does the compiler give an error message when you reduce the visibility of a method while overriding it in the ... you-reduce-the-visibility-of-a-method-in-a-java-subclass...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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polymorphism - Why can't you reduce the visibility of a method in a Java subclass?

Why does the compiler give an error message when you reduce the visibility of a method while overriding it in the ... you-reduce-the-visibility-of-a-method-in-a-java-subclass...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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372 views

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polymorphism - Metamorphic Code Examples

I understand the concept of Polymorphic and Metamorphic code but I recently read the Wikipedia page on ... https://stackoverflow.com/questions/10113254/metamorphic-code-examples...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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383 views

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polymorphism - Metamorphic Code Examples

I understand the concept of Polymorphic and Metamorphic code but I recently read the Wikipedia page on ... https://stackoverflow.com/questions/10113254/metamorphic-code-examples...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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502 views

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polymorphism - Java : set generic parameters for a method

I have a method that can take ResponseEntity as parameter. private ResponseEntity<OfferRest> mappedOfferByImagesEnabled( ResponseEntity< ... . My question, How can I do it?...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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