strategy-pattern

来源： https://stackoverflow.com/questions/31608902/polymorphism-vs-strategy-pattern

问题 Our Angular application has a service which can have different implementations, aka. “strategies”. For simplicity, let’s assume it’s an “event reporting” service. The event reporting service has a function for reporting information. Depending on a runtime preference, the reporting can either turned off, go to the console , or be sent to a REST API, or go somewhere else. Using pure TS, this would look like: interface IReporter { report (message: string): void; } class NoReporter implements

问题 Our Angular application has a service which can have different implementations, aka. “strategies”. For simplicity, let’s assume it’s an “event reporting” service. The event reporting service has a function for reporting information. Depending on a runtime preference, the reporting can either turned off, go to the console , or be sent to a REST API, or go somewhere else. Using pure TS, this would look like: interface IReporter { report (message: string): void; } class NoReporter implements

问题 This is the long version of a question I asked earlier For the tl;dr version please see here: Link I am sorry for this wall of text, but please bear with me. I put a lot of effort into the question and I believe the problem at hand should interesting to many here. Background I am writing a UI Framework with a classic Scene Graph. I have an abstract Top-Level class called Component and many subclasses, some of which are concrete while others abstract as well. A concrete subclass might be

问题 This is the long version of a question I asked earlier For the tl;dr version please see here: Link I am sorry for this wall of text, but please bear with me. I put a lot of effort into the question and I believe the problem at hand should interesting to many here. Background I am writing a UI Framework with a classic Scene Graph. I have an abstract Top-Level class called Component and many subclasses, some of which are concrete while others abstract as well. A concrete subclass might be

问题 I'm trying to roll out a strategy pattern with entity framework and the repository pattern using a simple example such as User and Post in which a user has many posts. From this answer here, I have the following domain: public interface IUser { public Guid UserId { get; set; } public string UserName { get; set; } public IEnumerable<Post> Posts { get; set; } } Add interfaces to support the roles in which you will use the user. public interface IAddPostsToUser : IUser { public void AddPost(Post

问题 This is a design related question. Lets say we have a public API called ClientAPI with a few web methods like CreateAccount, GetAccount. Depending on the customer, we use a number of different providers to fulfil these requests. So say we have ProviderA and ProviderB and ProviderC. ProviderA has a method signature/implementation of CreateAccount that needs (Firstname, Lastname) only and creates an account with ProviderA. ProviderB has a method signature/implementation of CreateAccount that

问题 How do I get microsoft unity to 'construct' a list of classes for a given interface type. Very Simple example: List<IShippingCalculation> list = new List<IShippingCalculation>(); list.Add(new NewYorkShippingCalculation()); list.Add(new FloridaShippingCalculation()); list.Add(new AlaskShippingCalculation()); //Not What I want public void calcship(List<IShippingCalculation> list) { var info = new ShippingInfo(list); info.CalculateShippingAmount(State.Alaska) } //Somehow in unity, must i do this

问题 I need to develop a strategy pattern where i have a main class with other three classes where i need to refer to the objects of the other three classes using the main class object.To solve this is the strategy pattern will help me? If so please do give me the syntax in Objective-C? 回答1: You'll want to look at Objective-C's protocol mechanism. Here's a simple protocol with a single required method: @protocol Strategy <NSObject> @required - (void) execute; @end Then you declare a class that

问题 I am having following application : 1) Mvc app : Hangfire client from where i will just enqueue jobs and host dashboard.This app will contains reference of my class library. 2) Console App : Hangfire server will live in this console application. 3) Class library : Shared library between hangfire server(Console app) and hangfire client(asp.net mvc) where my long running code will reside.Hangfire server will execute code of this library. I am having structure like below in Class library