anonymous

问题 I've got a service with a method that takes two Action s, one for success and one for failure. Each Action takes a Result parameter that contains additional information... void AuthoriseUser(AuthDetails loginDetails, Action<AuthResult> onSuccess, Action<AuthResult> onFailure); I'm writing a unit test for a class that is dependant on that service, and I want to test that this class does the correct things in the onSuccess(...) and onFailure(...) callbacks. These are either private or anonymous

问题 I'm not a java guy but I've inherited some code I need to patch up. I pulled the source into netbeans and I'm getting the error: Anonymous class implements interface; cannot have arguments. Here's the code: Executor background = Executors.newSingleThreadExecutor(); Runnable mylookupThread = new Runnable(FilePath, SearchIndex) { public void run() { MainWindow.this.processFile(this.val$FilePath); Thread t = new Thread(new lookupThread(MainWindow.arrFile, true, false, this.val$SearchIndex)); t

问题 I'm reviewing a collegue's code, and I see he has several constants defined in the global scope as: const string& SomeConstant = "This is some constant text"; Personally, this smells bad to me because the reference is referring to what I'm assuming is an "anonymous" object constructed from the given char array. Syntactically, it's legal (at least in VC++ 7), and it seems to run, but really I'd rather have him remove the & so there's no ambiguity as to what it's doing. So, is this TRULY safe

问题 If I had a poll on my site, and I didn't want to require a registration to vote, but I only wanted each visit one, how might I do this? Let's say a visitor from IP 123.34.243.57 visits the site and votes. Would it then be safe to disallow anyone from 123.34.243.* from voting? Is this a good strategy? What's another one? 回答1: This is a fundamental challenge with all voting sites on the Internet, and you're just breaking the surface of the problem. The way you've phrased it, you "only want to

问题 I have a third party Java library which an object with interface like this: public interface Handler<C> { void call(C context) throws Exception; } How can I concisely implement it in Kotlin similar to Java anonymous class like this: Handler<MyContext> handler = new Handler<MyContext> { @Override public void call(MyContext context) throws Exception { System.out.println("Hello world"); } } handler.call(myContext) // Prints "Hello world" 回答1: Assuming the interface has only a single method you

问题 My data are in the form of a cell array of structs. I am trying to implement a cellfun call that takes structfun as its function that, at the end of the day, will resize all of the vectors in the struct to the passed-in size. E.g. I have a 4-cell array each with a struct that contains one vector (going to be multiple vectors once I figure this out), and I want to resize each vector from index1 to index2 fun = function(foo, index1, index2) cellfun(@structfun(@(x) x(index1:index2), foo,

问题 I've got this error: "Anonymous blocks are not allowed unless they are part of a mixin" with this Jade file: html body style(type='text/css', media='screen') div#div_name display: block height: 300px obviously the problem is with display: block - any ideas \ solutions? 回答1: The following Jade style(type='text/css', media='screen') div#div_name display: block height: 300px will not compile. <style type="text/css" media="screen"></style> <div id="div_name"> <display><block></block></display>

问题 I have a model defined as below: class Example(models.Model): user = models.ForeignKey(User, null=True) other = models.CharField(max_length=100) The problem is Django refuses to assign django.contrib.auth.models.AnonymousUser directly to Example.user as null field so everytime I have to check if request.user.is_authenticated() ans assign Example.user = None manually. Is there a default value for AnonymousUser to use in a model field? 回答1: Only users actually in django.contrib.auth.models.User

问题 Sorry the question wasn't properly stated by me earlier. I try to implent the Factory Pattern. A better example: It is an abstract class Human with a function create. Based on the arguments that is passed to create it decides whether to return an instance of its subclass Man or an instance of subclass Woman. So you call create with: Human john = Human.create("Man"); The subclasses Man and Woman are inherited from the abstract class Human and are defined in the same file as Human. I don't want

问题 What is the difference between using a symfun and an anonymous function in Matlab? Which one is better i.e. faster? It seems like, I can use both for symbolic and real numbers. Here they discuss the difference between inline and anonymous functions, but don't mention symfun. 回答1: Basic MATLAB functionality is designed for numerical calculations, i.e. working with floating-point numbers. By default MATLAB variables and functions are numeric, and this is why in your linked discussion only