extension-methods

问题 Swift protocols can provide default implementations for functions and computed properties by adding extensions to them. I've done that plenty of times. It is my understanding that the default implementation is only used as a "fallback" : It's executed when a type conforms to the protocol but doesn't provide its own implementation. At least that's how I read The Swift Programming Language guide: If a conforming type provides its own implementation of a required method or property, that

问题 Swift protocols can provide default implementations for functions and computed properties by adding extensions to them. I've done that plenty of times. It is my understanding that the default implementation is only used as a "fallback" : It's executed when a type conforms to the protocol but doesn't provide its own implementation. At least that's how I read The Swift Programming Language guide: If a conforming type provides its own implementation of a required method or property, that

问题 I have the following program: public class Hit { readonly Hits _hits; readonly int _index; public Hit(Hits hits, int index) { this._hits = hits; this._index = index; } public int id { get { return _hits.Id(_index); } } public float score { get { return _hits.Score(_index); } } public string this[string key] { get { return _hits.Doc(_index).Get(key); } } } class HitList : IList<Hit> { protected Hits hits; public HitList(Hits hits) { this.hits = hits; } #region IList Members public int Add

问题 I am creating a "kind of" Extension method that will help me debug my future codes there's a Listview "LV_MyAppLog" with columns record # , MethodName, Method's OutPut, Time. only that the time part i was unable to decide which is the simplest but non the less The professional way to implement. this is the code i already built : public int LogCounter = 1; public void AHLog_AddRecord(string FunctionName = "N/A", string FunctionOutPut = "N/A") { ListViewItem MyItem= new ListViewItem(); MyItem

问题 I'd like to extend an RXSwift protocol, namely OsbervableConvertibleType, but I only want to create an extension method only on OsbervableConvertibleTypes, that has a Result object in them. Now, Result is generic again. But I'd like to retain the generic type in my extension function, so the return type of my function is generic as well. Something like this: extension ObservableConvertibleType where E: Result<T> { public func asResultDriver() -> RxCocoa.SharedSequence<RxCocoa

问题 I created a extension in typo3 and would like to make it live .Can any one explain the step to be follow? 回答1: create an account in typo3.org. Then in the typo3 backend (of your website)"Extension Manager > Settings" tab - enter your typo3.org account login credentials and save it. "Extension Manager > Available extensions" tab - click on your extension and then use the "TER upload" option. Have a nice day :) ! 回答2: Your question seems a bit general. In order to create your own extension in

问题 I have a requirement to connect to the server and collect data for processing. Below is my core class, which is responsible for looping through all the servers and try connecting them for processing. public class CoreDataProcessingEngine : ICoreDataProcessingEngine { private readonly COMLib.ServerGateway _aServerGw; private COMLib.ServerErrorInfo _aServerErrorInfo; Public CoreDataProcessingEngine() { _aServerGw = new COMLib.ServerGateway(); _aServerErrorInfo = new COMLib.ServerErrorInfo(); }

问题 One can call many LINQ methods in PowerShell with this simple notation: [int[]] $numbers = 1..10000 [Linq.Enumerable]::Sum($numbers) It is even a relatively simple matter to include a lambda in a call: [Func[int,int]] $delegate = { $n = $args[0]; if ($n % 3) { $n } else { -$n } } [Linq.Enumerable]::Sum($numbers, $delegate) What I am wondering, though, is how to call a generic LINQ method from PowerShell: is it even possible? I found this SO question that seems to indicate one can, but I have

问题 I want to convert this code into Swift. The Objective-C code here is making a singleton object(if I can describe as such). I can use dispatch_once_t to convert it, but I want to use a more elegant way which should be similar to " static let bundle: NSBundle! ". But " static let bundle: NSBundle! " is not allowed in an extension since it doesn't allow stored properties. So is it possible to convert the code without dispatch_once_t ? And I faced a problem that I can not have stored properties

问题 I was trying NBuilder in my unit test. An excellent library. However, I could not explain the following structure of classes and interfaces. In FizzWare.NBuilder namespace: ISingleObjectBuilder SingleObjectBuilderExtensions In FizzWare.NBuilder.Implementation IObjectBuilder` ObjectBuilder SingleObjectBuilderExtensions is simply a wrapper on IObjectBuilder . The client code should usually use a class named Builder which has a static method that gives you ISingleObjectBuilder . You never need