code-reuse

问题 Note: I am modifying this post, after I gained more experience working with Angular and Java. This is to avoid posting a new question. Over the past few months, working with different models to implement reusable AngularJS parts within a JSP code, finally decided to use the jsp include directive <%@include file="form-part.jsp" %> . This works well, and the only issue now is readability problem when using C Tags. For example, the variables are defined in Eclipse resource file as follows:

问题 Is there a way to get ObjectQuery<T> for specfied generic type? Pseudo: public partial class MyObjectContext { public ObjectSet<TEntity> GetObjectSet<TEntity>() { return Helper.GetObjectSet<TEntity>(this); } } 回答1: Yes this is what you need: public partial class MyObjectContext { public ObjectSet<TEntity> GetObjectSet<TEntity>() { return this.CreateObjectSet<TEntity>(); } } As you can see your helper method is not needed because you can call CreateObjectSet directly on MyObjectContext

问题 As far as I know, you cannot inherit constructors in C++. But there are situations, where it might be required that it looks like you can instantiate inherited classes the same way you instantiate their base: struct Base { int i; int const j; Base(int i, int j) : i(i), j(j) {} }; // option 1) struct Derived1 : Base { Derived1(int i, int j) : Base(i,j) {} }; Base* baseFactory() { return new Derived1(42,47); } // option 2) struct Derived2 : Base { }; Base* baseFactory() { Base* b = new Derived2

问题 With Xamarin, I have a small UI element which acts as a content divider: <BoxView StyleClass="contentDivider" HeightRequest="2" WidthRequest="1000" Margin="3, 0"/> Since I use this a number of times I wanted to be able to have the code written down once, and reuse that code - just like a class with its instance (DRY). It's most likely me being a blind bat and not being able to find how it's done. So, how can I reuse XAML elements? 回答1: You can do this with ContentViews (https://docs.microsoft

问题 UPDATE: So pretty much everyone here has told me that I just need to start all over again on how I designed my classes (thank you folks for your excellent answers by the way!). Taking the hint, I started doing extensive reading on the strategy pattern. I want to create behavior classes (or strategy classes) that inherit from an abstract base class or classes. The Candidate class would then have properties w/ the different abstract base class/classes as the Type for the behaviors or strategies

问题 Suppose I have a complex lambda expression as follows: x => x.A.HasValue || (x.B.HasValue && x.C == q) || (!x.C.HasValue && !x.A.HasValue) || //...expression goes on I want to use this as an Expression<Func<T,bool> in (e.g. Linq-To-Entities) Queryable.Where method. I also want to use it in the Enumerable.Where method, but the Where method only accepts a Func<T,bool> , not an Expression<Func<T,bool> . The lambda syntax itself can be used to generate either an Expression<Func<T,bool>> or a Func

问题 The following simple code attempts to reuse a MenuItem defined in the Window.Resources on two separate Menus. <Window x:Class="WpfApplication.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:collections="clr-namespace:System.Collections;assembly=mscorlib" Title="MainWindow" Height="350" Width="525"> <Window.Resources> <collections:ArrayList x:Key="menuItemValues"> <MenuItem Header="First"/> <MenuItem

问题 I have created a custom component (named customtitlewindow) the code of which is as follows: <?xml version="1.0" encoding="utf-8"?> <mx:TitleWindow xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx" layout="vertical" width="400" height="300" xmlns:comp="components.*" showCloseButton="true" keyDown="detectescapekeypress(event)" creationComplete="this.setFocus();" close="PopUpManager.removePopUp(this);" paddingTop="40">

问题 I have the following ViewModel: public class EditViewModel { public int FooType { get; set; } public IEnumerable<SelectListItem> FooTypes { get; set; } } I originally populated it in my Edit action like so: public ActionResult Edit(int id) { EditViewModel model = new EditViewModel(); model.FooTypes = new SelectList(repository.GetFooTypes(), "Id", "Value"); return View(model); } When I created the action to POST the values I had to repeat the same code: public ActionResult Edit(int id,

问题 Is there any way I could save my block of code in Visual Studio 2010 and reuse it in my future web applications without having to " Add existing files" ? Is there a feature in VS2010 that lets you globally store these blocks of code? Thanks! 回答1: Oded pretty much covered it but I'll just reiterate here. There are three main ways you can do this depending on how much code you want to store. For a little code just copy the code to your Toolbox: http://blogs.msdn.com/b/zainnab/archive/2010/01/24