lazy-loading

问题 I have the following JOINED inheritance root entity for geographic areas (like continents, countries, states etc.): @Entity @Table(name = "GeoAreas") @Inheritance(strategy = InheritanceType.JOINED) public abstract class GeoArea implements Serializable { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @Column protected Integer id; @Column protected String name; @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name = "parent_id", referencedColumnName = "id") protected GeoArea parent; ...

问题 Lazy loading is a commonly used technique. However, in Angular it seems that the granularity level of this technique stops at the module level. That means that you can have module main that loads in the browser, and then on special occasion module B and C and D can be loaded lazily. Almost all tutorials on web explain that. However, is there a way to load components lazily? Consider this simple example that user goes inside the application, and when clicks "invoices" link, URL changes to the

问题 I was looking for ways to do lazy initialization and found Lazy<T> which is included in .NET 4. I was thinking of rolling my own implementation of Lazy<T> for .NET 3.5 (with a simpler multi-thread policy), and I bumped into the following problem: Lazy has basically two types of constructors: class Lazy<T> { public Lazy(){...} // ctor #1 which uses T's default constructor for creating an instance of T, and public Lazy(Func<T> func){...} // ctor #2 which lets the caller decide how the instance

问题 Is there a common term / catch-phrase for the opposite of lazy loading? 回答1: The oposite term for lazy loading is eager loading. Eager loading is essentially computing the tasks when you ask for it. Lazy Loading is when you only do the computation when it is required. 回答2: I've seen the terms "Eager Loading" and "Aggressive Initialization" both used. 回答3: I'd say that the opposite of lazy is proactive loading , i.e. loading something in advance, before it's really needed. However it's hard to

问题 I'm struggling with updating existing lecturer's data in database. Every lecturer has Name , AcademicDegree and Courses which are taught by him/her ( Courses==Lessons ). In fact there are more properties in class Lecturer but they are not relevant. For simplicity lets assume that POCO class is defined this way: // POCO class (Entity Framework Reverse Engineering Code First) public class Lecturer { public Lecturer() { this.Courses = new List<Course>(); } public int Id_Lecturer { get; set; } //

问题 Is there such jQuery plugin? More specific: I want to use some elegant and easy way to postpone some code execution until it's really needed (some event happens). And when this event happens, the postponed code should get executed only once. Some kind of lazy initialization. For example, apply some animation to an element not when document is ready, but when user hovers over that element. I know how to do it the manual way but I don't like it because I have to think about checking and setting

问题 I'm working on a big angluar project and obviously we need a way to lazy load our scripts. I've worked with require.js before and it's quite good, but the problem is that after we concatenating and minifying our files, we got a 1.5M js file. So i just encountered OcLazyload and it looks promising but i saw a lot of examples on the web that use both require and ocLazyLoad, I'm a bit confused as to why you would want to use both. Aren't they both doing the same thing? 回答1: You need both

问题 I have DTAttributedTextContentView in UITableViewCell and try to load it with html (with image), but can't find a proper way to do this. I have look into DemoTextViewController.m in Demo which have image load with - (void)lazyImageView:(DTLazyImageView *)lazyImageView didChangeImageSize:(CGSize)size { NSURL *url = lazyImageView.url; CGSize imageSize = size; NSPredicate *pred = [NSPredicate predicateWithFormat:@"contentURL == %@", url]; // update all attachments that matchin this URL (possibly

问题 I've been learning scala and I gotta say that it's a really cool language. I especially like its pattern matching capabilities and function literals but I come from a javascript, ruby background and one of my favorite patterns in those languages is the lazy function and method definition pattern. An example in javascript is var foo = function() { var t = new Date(); foo = function() { return t; }; return foo(); }; The same code with minor tweaks works in ruby where you just use the singleton

问题 My problem is connected when the user scrolls the ListView. I looked around and saw numerous examples of 'listview lazy image', has also watched the video of the Google IO which speaks of 'good practice ' to make this work. But my problem continues when the user moves up and down the ListView. What happens is that when scrolling the list, the images that were loaded on each item are shuffled, and the avatar of each item going to the next item ends. I do not know if I'm being clear but I will