lazy-loading

问题 I have some 4500 entries in my database. What is the best way to show them in a ListView. Should I load them all in one stretch when the application initializes or should I use lazy loading? The list will also be searchable and filterable. Could you also point me to some nice articles that would gimme a better idea. Please do give me suggestions. 回答1: I would like to point you to here first but I also have some experience I would like to share. First, showing anything more than say 500 items

问题 I have got all images of iphone using AssetsLibrary.I am passing UIImage object in imageview and display images in scrollview. There are more than 200 images in iphone and i have to display all images in scrollview vertically without use of paging.This takes lots of time to display images and it has also memory issues. Is there any code for lazy loading of iphone images in scrollview 回答1: I've been working on this recently and have checked out loads of example code on the web. None of it

问题 Loading related object in MVC can be pretty confusing. There are lots of terms you need to be aware of and learn if you really want to know what you're doing when writing your entity model classes and controllers. A couple of questions that I've had for a very long time are: How does the virtual keyword work and when should I use it? And how does the Include extension method work and when should I use it? Here's what I'm talking about; virtual keyword: using System; using System.Collections

问题 And my next problem. I made a little Map, showing some points. I thought it is a good idea to split the map into 200x200px tiles for easy loading. But with every zoom level the map dragging becomes slower. I guess I made a logical mistake in my algorithm. The algorithms are: function LazyLoad(img) { //Viewport data var top = m.viewingBox.offset().top; var left = m.viewingBox.offset().left; var right = m.viewingBox.offset().left + m.viewingBox.width(); var bot = m.viewingBox.offset().top + m

问题 <div *ngFor="let header of headers"> <widget [header]="header" (loaded)="onLoaded($event)"></widget> </div> How to bind headers one by one based on the 'onLoaded' emit. Basically, I want the widget to load one by one after each successful data load(output method onLoaded emits boolean). 回答1: Its very weird requirement so you can start like this 1) create empty new array forLoop: any[] = []; 2) Before displaying headers values( may be in ngonint()) add first element from the headers array to

问题 I would like to check, if there are more than tho large images on my php-generated forum-page, and only if so, then I would like to load jquery and do some jquerystuff . How can I dynamically load the library only if the condition succeeds? 回答1: (function() { if (something) { var s = document.createElement('script'); s.type = 'text/javascript'; s.async = true; s.src = '//ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js'; (document.getElementsByTagName('head')[0] || document

问题 I am new to NHibernate. I have created two tables in sql server like UserDetails and its corresponding Products table. The mapping are like! My entity classes public class UserDetails { [Required(ErrorMessage = "Please enter User Id")] public virtual string UserId { get; set; } [Required(ErrorMessage = "Please enter User Name")] public virtual string UserName { get; set; } [Required(ErrorMessage = "Please enter Password")] public virtual string Password { get; set; } [Required(ErrorMessage =

问题 I have some difficulties with Spring and Hibernate and lazy loading. There are a lot of questions and answers, but not really what i am looking for. So lets say i have a Car class. With an id , name and one to many relationships with doors , windows and wheels . As they are oneToMany, they are default lazy loaded which is preferred because when i want to view the name of the car i dont want to see the tires and stuff. This works in my case, using the default findOne() methods of my

问题 When querying nhibernate, I'm seeing some odd behavior When I write a query like this Repository.QueryOver<Entity>() .Fetch(x => x.Child1).Eager .Fetch(x => x.child2).Eager It will eagerly grab child1 and child2 entities, but there are grandchildren for child1 and child2 that aren't lazily loaded. I'm a bit confused on how to achieve this. In my nhibernate mappings, it seems to have no affect on the laziness or eagerness of grandchildren and I require at least some entities be eagerly loaded

问题 I use Angular & UI router and I need for one of my parent states's resolves to be lazy. The reason for this is that I have a state called authenticated that is inherited by a whole hierarchy of child states. I need the resolve called isAuthenticated to be resolved lazily (i.e. each time a child of the authenticated state is entered). Here is my parent authenticated state: .state('authenticated', { abstract: true, parent: 'root', views: { 'header@': { controller: 'NavbarCtrl', templateUrl: