lazy-loading | 易学教程

“Lazy load” of data from a context processor

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问题 In each view of my application I need to have navigation menu prepared. So right now in every view I execute complicated query and store the menu in a dictionary which is passed to a template. In templates the variable in which I have the data is surrounded with "cache", so even though the queries are quite costly, it doesn't bother me. But I don't want to repeat myself in every view. I guessed that the best place to prepare the menu is in my own context processor. And so I did write one, but

Is there a helper to know whether a property has been loaded by Hibernate?

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问题 I need a helper to know whether a property has been loaded as a way to avoid LazyInitializationException . Is it possible? @Entity public class Parent { @OneToMany private List<Child> childList; } @Entity public class Child { } "select distinct p from Parent p left join fetch p.childList"; // Answer goes here // I want to avoid LazyInitializationException SomeHelper.isLoaded(p.getChildList()); 回答1: There are two methods, actually. To find out whether a lazy property has been initialized you

LazyLoad images not appearing until after a scroll

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问题 I'm using the lazyload plugin for jQuery. It's working fine, except one issue: The images src is not being swapped out for the data-original until you scroll. Once you scroll, even a tad, the images load - but I need them to load right when the page is ready. A note: This is purely a Chrome/Safari Issue. I am not having this issue in Firefox or Opera, or even IE9. I've tried following the suggestion of this post: http://sumanrs.wordpress.com/2011/02/08/jquery-lazy-loading-images-no-scrolling/

Combining LazyLoad and Jquery Masonry

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I have been trying to piece together masonry and moo tools lazyload however they both dont seem to go very well together although it possibly could just be because I am slightly useless at coding! The masonry works on this page . However when I try to put it together with lazyload it seems to totally mess up. Does anyone have any idea how to implement both plugins together? I have spent 6 days trying to figure it out and this is my final hope ha! Thanks Nathan Do Recently, I gotta solve this for one of my website. I have tried a couple of ways and it seems working. 1. First Method: Load

Lazy fetching single column (class attribute) with Hibernate

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What is Lazy Loading?

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What is Lazy Loading? [Edit after reading a few answers] Why do people use this term so often? Say you just use a ASP/ADO recordset and load it with data or ADO.NET Datasource for a gridview. I guess I should have asked why people use the term Lazy Loading, what "other" types are their? It's called lazy loading because, like a lazy person, you are putting off doing something you don't want to. The opposite is Eager Loading, where you load something right away, long before you need it. If you are curious why people might use lazy loading, consider an application that takes a LOOOOONG time to

iOS lazy-loading of table images

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问题 I have successfully implemented lazy-loading of images in my app using the example provided by apple here. The thing is that, I want the image to load as I am scrolling, but the image loads into the cell only when I finish dragging (Release my finger from the screen. Until then the cell remains empty). I have modified the code as follows: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { //NSLog(@"cell for row at indexpath, size - %f,

Lazy Loading with Ninject

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问题 I'm evaluating ninject2 but can't seem to figure out how to do lazy loading other than through the kernel. From what I can see that kind of defeats the purpose of using the [Inject] attributes. Is it possible to use the InjectAttribute but get lazy loading? I'd hate to force complete construction of an object graph every time I instantiated an object. To specify, I'm really just curious about the performance. 回答1: Update: My original answer was written before the .NET Framework 4 was released

Angular2 doesn't work Custom Reuse Strategy with Lazy module loading

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问题 I tried to use custom reuse strategy in my angular2 project, but I found it doesn't work with lazy module loading . Anyone who know about this? My project is angular 2.6.4 reuse-strategy.ts import {RouteReuseStrategy, ActivatedRouteSnapshot, DetachedRouteHandle} from "@angular/router"; export class CustomReuseStrategy implements RouteReuseStrategy { handlers: {[key: string]: DetachedRouteHandle} = {}; shouldDetach(route: ActivatedRouteSnapshot): boolean { console.debug('CustomReuseStrategy

AngularJS - load google map script async in directive for multiple maps

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问题 I am currently trying to load multiple google maps on a single page. I don't want to include google map API script into the HTML code as I don't want the script to be loaded unless the maps are in the current page. I want my maps to be called inside a single directive that will also perform the google map API script lazy loading. So I searched around and found a solution that I tweaked a bit, but my problem is that it will only load one map but not the others. My HTML looks like this: <div id