interface

问题 In a Going Native 2013 talk, the panel had suggested avoiding unsigned integer types when specifying variables that "can't be negative". 12:15: "Use signed integers unless you need 2's compliment arithmetic or a bit pattern." 12:55: "Use ints until you have a reason not to. Don't use unsigned unless you are fiddling with bit patterns, and never mix signed and unsigned." 42:45: "Whenever you mix signed and unsigned numbers you get trouble. The rules are just very surprising, and they turn up

问题 This is my current HiLo game, I want to integrate a menu with 4 options, 1. read csv file 2. play game 3. show results and 4. exit, any help is appreciated. Because I don't know where to start. import\ random n = random.randint(1,20) print(n) guesses = 0 while guesses < 5: print("Guess the number between 1 and 20") trial = input() trial = int(trial) guesses = guesses + 1 if trial < n: print("higher") if trial > n: print("lower") if trial == n: print("you win") break if trial == n: guesses =

问题 my current task needs to pay attention on mapping between different object types and so I recognized the very nice AutoMapper library. So far easy to handle but these different objects contains complex interface type properties. Let me show you a code snippet: public inferface IInterface { string TextProperty { get; set;} } public class A : IInterface { string TextProperty { get; set; } } public class B : IInterface { string TextProperty { get; set; } } public inferface IComplexInterface {

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . As part of my on-going attempt to come to terms with WPF/XAML, I've become interested in the application of fluent interfaces to UI coding. I am aware of Fluent Silverlight (http://code.google.com/p/fluent-silverlight/), but I can't seem to find anything equivalent for WPF. Just as a personal note, I'm finding

问题 I was wondering if it is somehow possible to define a derived type in Fortran which automatically returns the right type, without calling the type specifically e.g. var%real ? Here's an example to explain what I mean: module DervType implicit none type, public :: mytype real(8) :: r integer :: i logical :: l end type end module DervType program TestType use DervType implicit none type(mytype) :: test test = 1. !! <-- I don't want to use test%r here end program TestType Would this be possible

问题 Here's the scenario: public class A { public A {} void doSomething() { // do something here... } } Right now, the class is setup where you can create multiple instances. But I also see a need where I might want to restrict the class to only one instance, i.e. Singleton class. The problem is I'm not sure how to go about the design of accomplishing both goals: Multiple instances and one instance. It doesn't sound possible to do in just one class. I imagine I'll need to use a derived class, an

问题 I have come across a problem with protobuf-net and have narrowed it down to this simplest case. I want a linked list type structure, where a class has a property of the same type. When I serialize this it works great. However if the type is an interface instead of a class I get the following error: The type cannot be changed once a serializer has been generated for ConsoleApplication1.foo (ConsoleApplication1.ifoo) This is the code I have to generate this error: class Program { static void

问题 Is it possible to define an interface (e.g. MyClass Implements MyInterface) whose method/property definitions already match some of the methods/properties defined on a third-party (or a native) class? For example, the DataRow class has a number of properties/methods that make it "row-like". What if I want to implement an interface (i.e. IRowLike) that defines certain methods and properties already existing on the native DataRow class (which I cannot directly touch or extend). I simply want

问题 I have a utility class that needs to work on a generic Class but must be restricted to those that are an enum and implement a particular interface. // These two work Class<? extends Enum<?>> enumClass; Class<? extends MyInterface> interfaceClass; // This is what I want but does not work Class<? extends MyInterface & Enum<?>> enumAndInterfaceClass; For generics I can successfully use this public class MyClass<T extends Enum<T> & MyInterface> { public MyClass(Class<T> theClass) { ... } }

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 read lots of threads about the clone() method of Object and the Cloneable Interface but I couldn't find a legitimate answer to my