lazy-loading

问题 Am trying to create a simple lazy image load to replace default image with main item image after page has loaded and image is fully downloaded. But am getting and error using below jquery code. HTML Example <img src="default.png" data-src="image-1.png" class="productImage"/> <img src="default.png" data-src="image-2.png" class="productImage"/> <img src="default.png" data-src="image-3.png" class="productImage"/> <img src="default.png" data-src="image-4.png" class="productImage"/> Jquery Example

问题 Simply put I have a many to one relation on the Child class with the Parent class. I want to load all the children without having to load their parent details. My child class is @Entity public class Child implements Serializable { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Long id; private String name; @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name = "parentId", referencedColumnName = "id") private Parent parent; public Child() { } // Getters and setters here } My

问题 I am currently using the jQuery lazyload plugin to load images. I am using javascript to replace the src and data-original attributes. This causes a slight flicker on load. I am wondering if there is a way with jquery to select only the images below the fold or above the fold so that I can avoid this flicker. var $imgs = $("img:not(.nolazy)"); $imgs.each( function(){ var imgSrc = $(this).attr("src"); $(this).attr("data-original",imgSrc).attr("src","gray.gif"); }); $imgs.lazyload({ effect :

问题 I have some way of building a data structure (out of some file contents, say): def loadfile(FILE): return # some data structure created from the contents of FILE So I can do things like puppies = loadfile("puppies.csv") # wait for loadfile to work kitties = loadfile("kitties.csv") # wait some more print len(puppies) print puppies[32] In the above example, I wasted a bunch of time actually reading kitties.csv and creating a data structure that I never used. I'd like to avoid that waste without

问题 I want to have multiple routing modules in order to keep my application clean and easy to read. I currently use lazy loading for the SubComponent but I don't want to do this. So I am looking for a way to change this. Anyways, here is the currently working code. I have the following two routing files. app-routing.module.ts : import { NgModule } from '@angular/core'; import { Routes, RouterModule } from '@angular/router'; const routes: Routes = [ { path: '', component: HomeComponent }, { path:

问题 I thought Lazy Loading and infinite scrolling are same things, But today I heard that these are two different things. Is that true? 回答1: Lazy loading refers to deferring loading of any kind of content until it becomes necessary. For example, on a long page, images which are not currently visible do not need to be loaded. Only when the user scrolls the page over or near them do they get fetched from the server. Infinite scrolling refers to new content being loaded when the end of the page is

问题 I have recently started using AngularJS but I have run into a problem when using md-tabs (https://material.angularjs.org/latest/demo/tabs). On my page, I have several tabs and there are approaximately 30 images placed in each tab via ng-repeat. The problem is that all of the images in all of the tabs are loading when the page is opened which is taking a long time. I would prefer if only the content of the first (active) tab was loaded when the page is opened and that the content of all the

问题 I'm using Rails 3.2.0 Let's say I have: class Comment < ActiveRecord::Base has_many :articles end c1 = Comment.last then c1.articles.class # => Array c1.articles.where('id NOT IN (999999)').class # => ActiveRecord::Relation Why is the result of an association not a type of ActiveRecord::Relation ? It clearly is / was at some point : c1.articles.to_orig # undefined method `to_orig' for #<ActiveRecord::Relation:0x007fd820cc80a8> c1.articles.class # => Array Certain evaluations act upon an

问题 I am using jQuery Tools to create a scrollable product box which works very well. However, I would like to load the images via AJAX ... I have looked at Lazy load but can not get it to work for a horizontal div - it loads all the images in the div rather than just the visible ones. I am using this: http://jquerytools.org/demos/scrollable/index.html I have found some code called unveil - http://luis-almeida.github.com/unveil/ which is nice lightweight code but I can not work out how to change

问题 I couldn't able to find how to achieve lazy loading(even in MyBatis docs). My mapper xml is shown below: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.example.FooMyBatisLazyFetch"> <select id="callFooProc" parameterType="com.example.FooProcBundle" statementType="CALLABLE"> {call FooProc( #{arg1, jdbcType=VARCHAR, mode=IN}, #{arg2, jdbcType=VARCHAR, mode=IN}, #{arg3,