interface

问题 I am curious as to why just printing the memory address on a var directly works but trying to do the same action through an interface doesn't print out the memory address? package main import "fmt" type address struct { a int } type this interface { memory() } func (ad address) memory() { fmt.Println("a - ", ad) fmt.Println("a's memory address --> ", &ad) } func main() { ad := 43 fmt.Println("a - ", ad) fmt.Println("a's memory address --> ", &ad) //code init in here thisAddress := address{ a:

问题 Say I had a business object library which was using IoC to implement a data access library. Where should I define the Data Access Interface? Which library does it belong? Or should it be in a separate library just for interfaces? 回答1: I would define the interfaces within the business domain. Then the implementations of the interfaces would be in a library that references the business domain (and is referenced by whatever the application context is, or by an IoC library which is referenced by

问题 What's a good way to implement something similar to a Delphi/C# interface or abstract class in Python? A class that will force all its subclasses to implement a particular set of methods? 回答1: The simplest way to do this is to use the abstract base class implementation that has been included in Python since version 2.7. This lets you mark a base class as abstract by using the abc.ABCMeta metaclass. You may then mark methods and properties as abstract. When you instantiate a class with the

问题 For example if I wanted to see what my .NET options were for something implementing IList or IDictionary. Is there a way to find that for example in the MSDN documentation? 回答1: To find it in MSDN, I usually go to Google, type something like "MSDN IList", and to get to IList Interface which has a section "Classes that Implement IList". That's true for any of the interface classes. If you find a base class such as DictionaryBase, there will be a link called Derived Classes which will take you

问题 I'm trying to wrap my head around inheritance/interfaces/implementation a bit better in .NET. I have a class that's defined as follows (sort of): Public Class Sheet Property Name As String Property Steps As List(Of [Step]) End Class The thing is, [Step] is just a virtual, base class. There are 5 different concrete implementations of [Step]. To make matters a bit more complex, there are 3 DIRECT implementations of [Step], 2 of which are virtual. Each of those 2 has 2 subclasses that would

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 6 years ago . Edit: This snipped worked in the end. I had been trying this before but was actually experiencing a scoping issue with my javascript. I had appBack() defined in document.onready. Simply re-scoping that function

问题 I was reading Dart's documentation and I was a little bit confused, maybe because I'm coming from Ruby, as to how to use interfaces. Of course, interfaces are not unique to Dart and there are quite a number of explanations out there on when one should use an interface. This one, for example, seems to be saying that interfaces are only useful when you're in a team. What is it even supposed to mean in the open source world, where everybody reads and reuses somebody else's code? One interesting

问题 I have a very big class with lots of methods, is it possible to build an interface from this class using Resharper? 回答1: Yes. My shortcut is Ctrl + Shift + R to bring up the refactoring options. Doing this on the class name allows you to" Extract Interface..." Optionally, you can choose from the menu > ReSharper > Refactor > Extract Interface... 回答2: Uh, maybe I'm missing something here (I've never used resharper) but you can extract an interface from a class using the standard VS IDE

问题 What is the difference between Public Variable As Integer and Private pVariable As Integer Public Property Let Variable(ByVal lVariable As Integer) pVariable = lVariable End Property Public Property Get Variable() Variable = pVariable End Property in a VBA class module? And why would I use the second version? 回答1: As much as VBA is object-oriented it's still limited in many ways, but as far as this example goes it should be sufficient to just understand the basics of the OOP in VBA. Your code

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 6 years ago . I have a C++ Windows Program and I want to convert and visualize some data from this C++ app in an existing Matlab Program. Currently