Recent questions tagged inheritance

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inheritance - How to find what class(es) implements an interface (.Net)

The closest I could find to this question was this one: Getting all types that implement an interface But ... given interface? Thanks, Jeff See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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inheritance - Swift 2.0 Get Mirrored Superclass Properties

I need to get the properties of my class as a dictionary. For simplicity, I created a protocol which has ... of the superclass etc)? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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inheritance - Can't not downcast in java at runtime

I have a class Animal and a class Dog as following: class Animal{} class Dog extend Animal{} And the main ... cannot be cast to com.example.Dog See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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inheritance - Boost Python Runtime error when passing object of derived type from python to C++ function expecting a shared_ptr to base type

I have a function that takes a std::shared_ptr, and I want to pass an object of Derived type to this ... function expecting a shared_ptr<Base>? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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inheritance - Extending libraries in C++

Is it possible to extend a class from a C++ library without the source code? Would having the header be enough to ... but I don't know how. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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inheritance - C#, access child properties from parent reference?

public void GetProps(Parent p){ // want to access lots of child properties here string childProp1 = p.prop1; bool ... that can handle all this. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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inheritance - Is it possible to override a property and return a derived type in VB.NET?

Consider the following classes representing an Ordering system: Public Class OrderBase Public MustOverride Property OrderItem ... allow this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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inheritance - C# GetMethod doesn't return a parent method

I have the following class tree: public class A { public static object GetMe(SomeOtherClass something) { return ... no avail. Any help? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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inheritance - Want to create a Generic AsyncTask

In my project. For almost every Activity I have to make an AsyncTask .. And Almost the work is same for all of ... it. It will be very helpful.. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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inheritance - C#: override a property of the parent class

I have a class that inherits from X509Certificate2. I want the NotAfter property to be in UTC rather than ... suitable property for override" See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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666 views

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inheritance - Python: unable to inherit from a C extension

I am trying to add a few extra methods to a matrix type from the pysparse library. Apart from that I want the ... the same way as the original? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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642 views

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inheritance - C# Cannot convert from IEnumerable<Base> to IEnumerable<Derived>

I recently run into trouble when trying to AddRange(IEnumerable) to a List. Probably a classic issue, but I do not ... in the future, too...? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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inheritance - Determining Django Model Instance Types after a Query on a Base-class

Is there a way to determine what the 'real' class of a Django database object is, after it has been returned ... that doesn't seem to work. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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587 views

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inheritance - Is int an object in Java?

More precisely, is int a part of the Integer class (a stripped down version or something) or is it ... was just chosen for convenience) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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554 views

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inheritance - No provider for ConnectionBackend while inheriting from Http

I am trying to make a wrapper around built in Http service in angular 2 to have a possibility to add custom ... me? Where is the problem? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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590 views

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inheritance - Does java.util.HashMap not implement java.util.Map in Kotlin?

I have trouble understanding why a Java HashMap is incompatible with a Java Map in Kotlin: val map : java.util.Map<Int, ... ) // is now OK } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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inheritance - “every class in java extends the MetaClass Object” does it imply that every subclass causes a Diamond issue

These two facts in java Fact 1 Every class in java by default extends the java meta class Object and ... 't the two statements contradictory? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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559 views

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inheritance - How do I call PHP parent methods from within an inherited method?

In PHP, I'm trying to reference a method defined in an object's parent class, from a method inherited from ... that extend (say) top_class? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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664 views

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inheritance - Java Constructor and Field Initialization Order

I aware that Java object constructors implicitly initialize their instance's non-static fields. However, I'm ... am missing something obvious. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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inheritance - Java, anonymous inner class definition

I've seen a couple of examples similar to this in Java, and am hoping someone can explain what is ... original apple second: modified apple See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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728 views

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inheritance - How to Inherit or Extend typeDefs in GraphQL

I have a type User. Users can also be a type TeamMember. The only difference between a User and TeamMember ... more like javascript's prototype See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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512 views

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inheritance - Hibernate @Embeddable class which extends another @Embeddable class, Properties not found for @OneToMany mapping

We are translating old xml based configuration to Annotation based configuration Situation There is a class which is annotated ... " /> </set> See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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751 views

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inheritance - Sub-classing Fixnum in ruby

So I understand you aren't supposed to to directly subclass Fixnum, Float or Integer, as they don't have a #new ... .increment + 4 # => 10 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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570 views

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inheritance - How JVM loads parent classes in Java

Code: class A { static { System.out.println("loading A static 1"); } static { System.out.println(" ... so how JVM loads class hierarchies? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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540 views

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inheritance - Objective-C detect if class overrides inherited method

Is there a way to dynamically detect from within a child class if its overriding its parents methods? Class ... methods versus keeping track. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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714 views

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inheritance - Find all subclasses in dart

I have three classes in dart: class A {} class B extends A{} class C extends A{} There is a way to ... findAllSubclasses('A'); print(result); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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708 views

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inheritance - C++ Calling a copy constructor on an unknown derived class through an abstract base class

I'm making a tree that has several different node types: a binary node, a unary node, and a terminal node. I ... copy constructor I need it to? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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515 views

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inheritance - C++: Accessing parent methods and variables

In which way should I access this parent method and parent variable? class Base { public: std::string mWords; ... what if there is ambiguity? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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