loading | 易学教程

How can the delay before displaying meteor collections be best addressed?

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问题 Before displaying the items from a collection, meteor seems to do some processing that leaves the client window without updates. You can see this live if you surf to http://madewith.meteor.com on a reasonable machine. My 2.6GHz 4GB RAM laptop takes about 5 seconds to render the items in the list, during which there is no indication of progress and a new user in a hurry could reasonably believe the page has finished loading. Is there a way to incrementally display items from a collection, such

Loader not working during synchronous ajax call in chrome

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问题 Loader not working during a synchronous(Async:false) ajax call in google chrome. Working fine in Firefox & IE. During my debug testing, Loader showing until ajax request start. getting struck off or disappears when request sent to server, where I kept a debug point. I have tried other solutions like use of ajaxStart, beforeSend & ajax loader ect., But no use. Please give valid solution <div id="LoaderDiv" style="display: none"> <img id="ImageLoader" src="Images/loading.gif" /> </div> $('

Is the class loaded when it's reference is declared?

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问题 Does creating a reference to an object of a class cause the class to be loaded ? Static variables are initialized when the class is loaded, so considering the following code the answer is no, am I right? class A{ static int f(){ System.out.println("initializing!"); return 0; } static final int i = f(); } public class Main { public static void main(String[] args) { A a; } } The code gives no output. 回答1: Yes. Static initializers are called when a class method is called or an instance is

numpy arrays: filling and extracting data quickly

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问题 See important clarification at bottom of this question. I am using numpy to speed up some processing of longitude/latitude coordinates. Unfortunately, my numpy "optimizations" made my code run about 5x more slowly than it ran without using numpy. The bottleneck seems to be in filling the numpy array with my data, and then extracting out that data after I have done the mathematical transformations. To fill the array I basically have a loop like: point_list = GetMyPoints() # returns a long list

Class Loading Application Context Spring

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问题 I have a Spring web project and I need load some classes after application context has been initialized because those classes will eventually used in future. Thus, I try to preload them before use to improve performance. How to do it ? Please help. Thanks. 回答1: To load a class into JVM it is enough simply to call Class.forName('com.foo.bar.MyClassToPreLoad') method. You can do it e.g. in your own implementation of javax.servlet.ServletContextListener and then register it in web.xml <listener>

Rails 3.2.9 and models in subfolders

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问题 Since rails 3.2.9 I'm unable to store models in subfolders. In my app I have this tree: models -type_models -assets -user -concerns Also in application.rb there is config.autoload_paths += Dir["#{config.root}/app/models/*"] All things was ok till rails 3.2.9. Now I have "Unknown constant" error. I don't want to namespace tons of model and fix all app to use namespaced models. Warning: Error loading /var/www/my_app/app/models/type_models/context_type.rb: uninitialized constant TypeModels:

how to show div #loading whilst div #content loads

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问题 i am wanting to implement a solution where: whilst contents in div #content are loading, hide div #content, show div #loading, then when div #content has loaded, hide div #loading, fade in div #content i have tried: html: <div id="content">  <img src="http://lorempixel.com/1920/1920/"> </div> <div id="loading">  <img src="http://lorempixel.com/400/200/"> </div> js: // when user browses to page $('#content').hide(); $('

Flexslider Slide Width Issue

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问题 I have a strange issue using flexslider. The Slide LIs don't get the correct width so that all slides are shown. This only occurs on first page load. As soon as I switch to another tab and switch back everything looks fine. Maybe a JS Loading Problem?! Screenshot: here flexslider.css .flexslider {margin: 0; padding: 0;} .flexslider .slides > li {text-align: center; display: none; -webkit-backface-visibility: hidden;} /* Hide the slides before the JS is loaded. Avoids image jumping */

Loading Screen from any Class in Swift

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I am trying to implement a loading screen in swift, that I can reuse from any class in the project (I have a few classes that will handle 'long running' activities) The public function is, from another answer: public class LoadingOverlay{ var overlayView = UIView() var activityIndicator = UIActivityIndicatorView() class var shared: LoadingOverlay { struct Static { static let instance: LoadingOverlay = LoadingOverlay() } return Static.instance } public func showOverlay(view: UIView) { overlayView.frame = CGRectMake(0, 0, 80, 80) overlayView.center = view.center overlayView.backgroundColor =

Egret制作Loading页面及分步加载资源教程

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我们都知道，当游戏越做越大，资源越来越多的时候，加载资源会造成大量时间的浪费。为避免加载资源时游戏黑屏，导致玩家误认为游戏非正常运行，Loading界面起到至关重要的作用。今天就为大家带来用Egret制作Loading页面及分步加载资源的教程。本文涉及以下内容： · RES加载Loading界面所使用的资源 · 分步加载资源加载LoadingUI所需要的资源把LoadingUI所需要的资源配置到default.res.json的loading组中，组名任意。如下：在Main.ts修改loadResource()函数资源的加载顺序，先把LoadingUI所需要的资源异步加载成功，再创建LoadingUI的实例。 private async loadResource() { try { await RES.loadConfig("resource/default.res.json", "resource/");//加载配置表 await RES.loadGroup("loading");//加载loading组 const loadingView = new LoadingUI();//创建loadingUI实例 this.stage.addChild(loadingView); await RES.loadGroup("preload", 0, loadingView);/