scope

问题 Take the following code: ### Dependencies require 'rubygems' require 'sinatra' require 'datamapper' ### Configuration config = YAML::load(File.read('config.yml')) name = config['config']['name'] description = config['config']['description'] username = config['config']['username'] password = config['config']['password'] theme = config['config']['theme'] set :public, 'views/themes/#{theme}/static' ### Models DataMapper.setup(:default, "sqlite3://#{Dir.pwd}/marvin.db") class Post include

问题 What's the scope of System.setProperty in Android? If I set a property (say System.setProperty("http.keepAlive", "false") ), does it affect all apps in the system, the current app, the current task or the current thread only? Where is this documented? 回答1: Java "system" properties do not cross process boundaries, they are held in memory and are tied to a single instance of the virtual machine. Therefore if you set a system property within application it will not be visible to other

问题 Is there a way to remove a scope from the digest cycles? In other words, to suspend/resume a scope digest cycle? In my case, I have all pages already loaded, but not all of them visible. So I'd like to suspend the ones that aren't visible to avoid useless processing. I don't want to use ng-view + $route , I don't want/need deep-linking. I saw this thread and arrived to this fiddle. It probably does the work, but it's pretty invasive and not very framework-update-friendly. Is there any other

问题 I'm looking for a way to set the scope of require_once() to the global scope, when require_once() is used inside a function. Something like the following code should work: file `foo.php': <?php $foo = 42; actual code: <?php function includeFooFile() { require_once("foo.php"); // scope of "foo.php" will be the function scope } $foo = 23; includeFooFile(); echo($foo."\n"); // will print 23, but I want it to print 42. Is there a way to explicitly set the scope of require_once() ? Is there a nice

问题 Object are passed with their reference in javascript. Meaning change in that object from any where should be reflected. In this case, the expected output was {} for console.log(a) function change(a,b) { a.x = 'added'; a = b;//assigning a as {} to b } a={} b={} change(a,b); console.log(a); //expected {} but output {x:'added'} console.log(b) What is happening here? It should not be because of functional scope as far as I know. Thank you 回答1: If you added another line you can get a clearer

问题 I was practicing some scenario and find a case: Here is fiddle According to closure bar function should have access to var x so I expected to alert 1 and condition get false due to if(!1) but it alerted undefined and condition get true and second alert is with value 10. var x = 1; function bar() { alert(x); if (!x) { var x = 10; } alert(x); } bar(); So I am confused why it is prompting undefined? According to hoisting in a particular scope you define a variable anywhere it is considered as

问题 Ok, so that title probably doesn't explain my question well. Hopefully this makes sense. This is also my first application with jQuery, so forgive me if I'm doing something dumb. I have the following function: function getRandomImages(limit) { imagesArray = new Array(); $.getJSON('createImageArray.php', {limit: limit}, function(data) { $.each(data, function(i) { imagesArray[i] = data[i]; //imagesArray is declared globally. }); }); } The getJSON is correctly grabbing the JSON object. It

问题 I want to invoke the window.setTimeot function with my custom scope so I use the call method, but there is something wrong. function foo() { this.bar = function() { console.log("keep going"); window.setTimeout.call(this,this.bar,100); } this.bar(); } new foo; under Firefox this prints to the console only 1 line and then nothing, and under google chrome it throws a TypeError. What is the problem in my code? 回答1: Using call does not help here: it calls setTimeout with your this object, but the

问题 Here is my script code: // ==UserScript== // @name test // @description test // @include http://* // @copyright Bruno Tyndall // ==/UserScript== var main = function() { var b = document.getElementsByTagName('body')[0]; var t = document.createElement('div'); t.innerHTML = '<a href="javascript:void(0);" style="color:white;">Hello World</a>'; t.style.position = 'absolute'; t.style.zIndex = 1000; t.style.bottom = '5px'; t.style.right = '5px'; t.firstChild.setAttribute('onclick', 'test();'); b

问题 I have 2 JSF managed beans A and B and I need to expire/destruct/destroy A after 2 minutes and B after 5 minutes. I checked this related question Timing out from a bean, but it is expiring whole session. I do not want to expire whole session. How can I achieve this with a custom scope? 回答1: Given that you're using JSF bean management facility (and thus not CDI, which would require a completely different answer), you can achieve this with @CustomScoped. The @CustomScoped value must refer a Map