generics

问题 I have a (for me) complex Java generics problem. I read through some documentation and understand some but certainly not all of what I should. Basically, for me, trying to solve it would result in try and error. In the following, I give a condensed example of my code, once without any generics (so one can hopefully understand what I want to achieve) and the other with some additions that come closer to the solution. Please correct my second version and/or point me to specific documentation.

问题 This question already has answers here : What are alternatives to generic collections for COM Interop? (4 answers) Closed 6 years ago . COM doesn't support generics?What would be the best way to replicate this List<T> so that it's COM visible in the tlh file. EDIT:: c#:: [ComVisible(true)] [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] [Guid("FA677671-5E26-4307-AD2B-19BF1E7AFF8B")] public interface IEvents { IEvents[] CreateListeners(); } in C++ i have, CComSafeArray<CSharp::IEvents>

问题 I am not sure if this is possible, but I have started a new project and I am trying to clean up the way I work with the DbContext . I am trying to do this by using generics. The first part is easy. I create a Repository class like this: public class Repository<T> where T : class { protected readonly DbContext _dbContext; protected readonly DbSet<T> _dbEntitySet; public Repository(InteractiveChoicesContext dbContext) { _dbContext = dbContext; _dbEntitySet = dbContext.Set<T>(); } /// <summary>

问题 I'm in the process of learning Go and the documentation and interactive lessons say that an empty interface can hold any type, as it requires no additionally implemented methods. So for an example: func describe(i interace{}) { fmt.Printf("Type: %T | Value: %v\n", i, i) } ...would print out... "Type: int | Value: 5" // for i := 5 "Type: string | Value: test" // for i := "test" ... etc So I guess my question is if this is Go's way of implementing generic functions or if there is another, more

问题 I'm in the process of learning Go and the documentation and interactive lessons say that an empty interface can hold any type, as it requires no additionally implemented methods. So for an example: func describe(i interace{}) { fmt.Printf("Type: %T | Value: %v\n", i, i) } ...would print out... "Type: int | Value: 5" // for i := 5 "Type: string | Value: test" // for i := "test" ... etc So I guess my question is if this is Go's way of implementing generic functions or if there is another, more

问题 I have /var/www/cool_codebase on www.example.com AND I have /var/www/cool_codebase on www.example.net The codebases are for the same web app running on different servers. There is some specialisation between the codebases (client-specific bits and bobs etc) - but not too much. One codebase has files that the other doesn't and vice-versa. Some bits of programming are different too. I have downloaded each codebase to my localhost and my question is: How can I merge these two folders into one

问题 I have /var/www/cool_codebase on www.example.com AND I have /var/www/cool_codebase on www.example.net The codebases are for the same web app running on different servers. There is some specialisation between the codebases (client-specific bits and bobs etc) - but not too much. One codebase has files that the other doesn't and vice-versa. Some bits of programming are different too. I have downloaded each codebase to my localhost and my question is: How can I merge these two folders into one

问题 FYI, looks like this question already has a LISP equivalent. Recently I wanted to create a dataframe extension to the R base function setdiff and thought a generic would be nice. The following works but is clunky: #' @export setdiff.default setdiff.default <- setdiff #' @export setdiff <- function(x, ...) { UseMethod("setdiff") } #' @export setdiff.data.frame <- function(A, B) { A[!duplicated(rbind(B, A))[nrow(B) + 1:nrow(A)], ] } When you load the package, the base function is masked. If I

问题 FYI, looks like this question already has a LISP equivalent. Recently I wanted to create a dataframe extension to the R base function setdiff and thought a generic would be nice. The following works but is clunky: #' @export setdiff.default setdiff.default <- setdiff #' @export setdiff <- function(x, ...) { UseMethod("setdiff") } #' @export setdiff.data.frame <- function(A, B) { A[!duplicated(rbind(B, A))[nrow(B) + 1:nrow(A)], ] } When you load the package, the base function is masked. If I

问题 I now have a working JavaScript autocomplete function, thanks to help from many of you. Now I want to make the function reusable. There are three variables that need to be specified for each instance of the function, as shown below. What I don't know how to do is instantiate this function with different values for these three vars. Here is my HTML field: <div class="ui-widget"> Text or Value: <input type="text" id="dotmatch" /> </div> And here is the JavaScript code which I want to keep in