wrapper

问题 I have a third party library containing a class which performs a function asynchronously. The class inherits from the Form. The function basically performs a calculation based on data stored in a database. Once it has finished, it calls a _Complete event in the calling form. What I would like to do is call the function synchronously but from a non-windows form application. The problem is, no matter what I do, my application blocks and the _Complete event handler never fires. From a windows

问题 I'd like to wrap std::cout for formatting, like so: mycout([what type?] x, [optional args]) { ... // do some formatting on x first std::cout << x; } and still be able to use expressive syntax like mycout("test" << i << endl << somevar, indent) instead of being forced to be more verbose like mycout(std::stringstream("test") << i ...) How can I implement this? What type to make x ? Edit: added consideration for optional arguments 回答1: How about this: struct MyCout {}; extern MyCout myCout;

问题 How can I write my component to wrap another vue component, while my wrapper component get some extra props? My wrapper template component should be: <wrapper-component> <v-table></v-table> <!-- pass to v-table all the props beside prop1 and prop2 --> </wrapper-component> and the wrapper props: props: { prop1: String, prop2: String } Here I want to wrap a table component, and pass to the table component all the props and events that were passed to the wrapper, beside two extra props prop1 and

问题 Is there a tool that can generate extract and generate interfaces for existing classes? I know Visual Studio will extract an Interface for an existing class. However, I would also like to generate a wrapper class that implements that functionality. I believe this would help tremendously for unit testing. Example Existing Class: public class ThirdPartyClass { public void Method1(){} public void Method2(){} } This can be generated by Visual Studio (Extract Interface): public interface

问题 since I am new to Servlet programming, it is possible that I ask a basic question. I am writing an application where a Filter gets the response from a servlet, and does some computation with it. I found out that I need a wrapper class to catch the response. My question now is why the wrapper is needed? Thanks in advance! 回答1: 1) Lets first understand how Request and Request Filter work: When, lets say client, makes a request to servlet, it goes through container. Container decides what

问题 I am using defaultdict(set) to populate an internal mapping in a very large data structure. After it's populated, the whole structure (including the mapping) is exposed to the client code. At that point, I don't want anyone modifying the mapping. And nobody does, intentionally. But sometimes, client code may by accident refer to an element that doesn't exist. At that point, a normal dictionary would have raised KeyError , but since the mapping is defaultdict , it simply creates a new element

问题 Widening and Boxing Java primitives. I know it is not possible to widen a wrapper class from one to another as they are not from the same inheritence tree. Why though is it not possible to widen a primitive to another primitive type and autobox the widened primitive? Given that a byte argument can be passed to a method that expects an int, why cant the byte in the following example be widened to an int and then boxed to an Integer? class ScjpTest{ static void goInteger(Integer x){ System.out

问题 I spent about 3 days reading about this topic... I am totally lost now thanks to the many tutorials and answered questions about how to create a native DLL. If you have some time to spare please care to explain a little about the topic and help me - if you don't have time then just go to the simple form of my question down there... Here is what I know about the topic so far: 1) I need to use a macro defined as __declspec(ddlexport) and __declspec(ddlimport) before class name to export all the

问题 I spent about 3 days reading about this topic... I am totally lost now thanks to the many tutorials and answered questions about how to create a native DLL. If you have some time to spare please care to explain a little about the topic and help me - if you don't have time then just go to the simple form of my question down there... Here is what I know about the topic so far: 1) I need to use a macro defined as __declspec(ddlexport) and __declspec(ddlimport) before class name to export all the

问题 Java Wrapper classes are supposed to be immutable. This means that once an object is being created, e.g., Integer i = new Integer(5); its value cannot be changed. However, doing i = 6; is perfectly valid. So, what does immutability in this context mean? Does this have to do with auto-boxing/unboxing? If so, is there any way to prevent the compiler from doing it? Thank you 回答1: i is a reference. Your code change the reference i to point to a different, equally immutable, Integer . final