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可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Wondering if there’s a plugin or best way of setting up an ActiveRecord class so that, for example, when a record enter the "published" state, certain attributes are frozen so that they could not be tampered with. 回答1: You can freeze an entire AR::B object by setting @readonly to true (in a method), but that will lock out all attributes. The way I would recommend is by defining attribute setter methods that check for the current state before passing to super: class Post < ActiveRecord::Base def author=(author) super unless self.published?

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: As part of our project, we have created quite a bushy folder/file tree on S3 with all the files taking up about 6TB of data. We currently have no backup of this data which is bad. We want to do periodic back ups. Seems like Glacier is the way to go. The question is: what are the ways to keep the total cost of a back up down? Most of our files are text so we can compresses them and upload whole ZIP archives. This will require processing (on EC2) so I am curious whether there is any rule of thumb to compare extra cost of running an EC2

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I have a Hp envy notebook with Intel i7 and 8gb ram and 2gb graphics, still sometimes android studio stucks when I am working with xml or design the app. Is there any problem with my laptop or android studio? 回答1: It's probably because there's not enough heap memory for AS. You might want to try the first technique mentioned in this blog: Eliminate Lags & Stutters in Android Studio . Content of link Increasing Android Studio's Memory Heap: Android Studio, like other Java applications, is known for hogging an insane amount of memory

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have a web service that I have JAX-WS generated client bindings as below: // web service client generated by JAX-WS @WebServiceClient( ... ) public class WebService_Service extends Service { public WebService_Service(URL wsdlLocation, QName serviceName) { super(wsdlLocation, serviceName); } WebService getWebServiceSOAP() { // ... } } I want to be able to create an instance of this that points to a remote service like: WebService_Service svc = new WebService_Service( new URL("http://www.example.com/ws?wsdl"), new QName("http://www.example

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Is there any way to scroll down on the page while Chrome is paused in debugger mode without unpausing? 回答1: If your tools are docked, you can undock it to see a bit more. Another method: Go to the Elements tab. Right-click on any visible element (i.e. not hidden, display:none , etc.). Choose the "Scroll Into View" context menu entry. Chrome will scroll the page if necessary to get the element in the visible portion of the window. 回答2: Taken from here . An easy workaround for the scrolling lock-up is to just jump to the console, and: window

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am getting a lot of decimals in the output of this code (Fahrenheit to Celsius converter). My code currently looks like this: def main(): printC(formeln(typeHere())) def typeHere(): global Fahrenheit try: Fahrenheit = int(raw_input("Hi! Enter Fahrenheit value, and get it in Celsius!\n")) except ValueError: print "\nYour insertion was not a digit!" print "We've put your Fahrenheit value to 50!" Fahrenheit = 50 return Fahrenheit def formeln(c): Celsius = (Fahrenheit - 32.00) * 5.00/9.00 return Celsius def printC(answer): answer = str(answer)

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I want to restart an elasticsearch node with a new configuration. What is the best way to gracefully shut down an node? Is killing the process the best way of shutting the server down, or is there some magic URL I can use to shut the node down? 回答1: Updated answer. _shutdown API has been removed in elasticsearch 2.x. Some options: In your terminal (dev mode basically), just type "Ctrl-C" If you started it as a daemon ( -d ) find the PID and kill the process: SIGTERM will shut Elasticsearch down cleanly ( kill -15 PID ) If running as a

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am making country state and city drop down with the help of ajax in our codeigniter frame work . The structure of database given bellow. Country country_id,country_name State country_id,state_id,state_name city country_id,state_id,city_id,city_name user controler function country(){ $data['header']='Deal Management'; $data['page'] = 'admin/page/user-view'; $data['Country'] = $this->deal->getCountry(); $this->load->view($this->_admin_container,$data); } function get_cities($Country){ $this->load->model('city_model'); header('Content-Type:

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Currently I have the following code which detects when a user has started scrolling and if they've reached the center of the page. $(window).scroll(function() { if ($(window).scrollTop() > $(window).height() / 2) { //Load more posts } }); However the problem I have is that whenever a user starts scrolling, the above script fires. So if a user scrolls up to view previous posts, this loads more posts. If a user is in the center and scrolls just a tiny bit, the script loads more posts. My question is, is there a way to determine when a user has

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I can't find what I need. I have this code <hgroup id="subheader"> <h1>lorem ipsum</h1> <h2>ipsum lorem</h2> <a href="#" class="arrow-down">read More</a> </hgroup> I want the link to have a border with a down triangle at the bottom. But it has to be transparent, because it goes in front of an image. Is that possible? 回答1: The shape given in question is a bit complex to achieve with full transparency because of the area cut by the arrow having to be transparent too. Because of this, the techniques that are generally used for creating such