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问题 I've to write a weighted load balancing algorithm and I'm looking for some references. Is there any book ? that you can suggest to understand such algorithms. Thanks! 回答1: A simple algorithm here isn't that complicated. Let's say you have a list of servers with the following weights: A 10 B 20 C 30 Where the higher weight represents it can handle more traffic. Just divide the amount of traffic sent to each server by the weight and sort smallest to largest. The server that comes out on top

问题 The R package I am developing requires several R data objects, such as pre-computed models and parameters. Currently I have each object in the 'data' directory of the package in individual .RData files. When using the package users can use the "data" function to attach these objects to their environment. The behaviour I would like instead would be that on loading the package the data objects are automatically attached to the internal package environment and not accessible to the user directly

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . It's been on the cards for a while, but now that Amazon have released Elastic Load balancing (ELB), what are your thoughts on deploying this solution for a high-traffic web application? Should we replace HAProxy or consider ELB as a complimentary service in front of HAProxy? 回答1: I've been running an ELB instead

问题 I am using the google web translate element on my page. For those that don't know what it is you can find it here: http://translate.google.com/translate_tools It loads on the page using javascript. I have it embedded on the top of my page which causes the rest of my content to stop loading until the translate bar has completed it's load. How can I delay the javascript running until my page has fully loaded?? This is the script: <div id="google_translate_element"></div><script> function

问题 This question already has answers here : Closed 8 years ago . Possible Duplicate: How can I save and load the alpha values of a UIButton in an app? I would like to save the state of the UIButton (e.g. its alpha value and whether it is hidden or not) and this would then load up when the user quits and reloads the app. I've tried some bits of code with NSUserDefaults but with no luck. Could somebody help with some sample code so that I can save and load the button's state? Thanks, James 回答1:

问题 i'm wondering what's the best method to save and load data in a iphone application. i'm trying to save strings into a text file or something like that and load them into a table view, so that the first entry in the text file is the first row in the table view and so on... somebody got an idea how I could realize that? thanks in advance. sean 回答1: There are basically three methods for saving data: Use File Manager to save the file to the file system. (But in your case, you should not do that)

问题 I have searched everywhere and tried lots of code but nothing seems to be working for me. All I need to do is to load (on viewDidLoad) a text field and save it when a button is pressed. What is the easiest method of doing this? I am working with a single window application, I don't have a view controller (this may make a difference?) Thanks, James 回答1: Using an SQLite database: -(IBAction) checkNotes{ sqlite3_stmt *statement; const char *dbpath = [databasePath UTF8String]; if (sqlite3_open

问题 I have searched everywhere and tried lots of code but nothing seems to be working for me. All I need to do is to load (on viewDidLoad) a text field and save it when a button is pressed. What is the easiest method of doing this? I am working with a single window application, I don't have a view controller (this may make a difference?) Thanks, James 回答1: Using an SQLite database: -(IBAction) checkNotes{ sqlite3_stmt *statement; const char *dbpath = [databasePath UTF8String]; if (sqlite3_open

问题 I am creating a mobile web app with jQuery Mobile and would like to hide the search bar above the visible area. So the user would need to pull the page down to see the search bar. I'm thinking the best way to do that is to define the search bar as usual then on page load manually set the scroll position, say down 55px. Here's my code: $(document).ready( function() { $("html,body").scrollTop(55); } The problem is, I can see upon refreshing the page it is hidden from view, but once it has fully

问题 I have simple script to check image, but it is not working properly on my ipad with ios 5.1. In image i receive stream of jpg's, so load must work on each frame (as in big safari), but in ipad it fires only once. May be some suggestions? $('#image').load(function(){ console.log(new Date().getTime();); }); 回答1: It is mentioned on the jQuery official website: Caveats of the load event when used with images A common challenge developers attempt to solve using the .load() shortcut is to execute a