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• WCF Custom Delegation/Authentication without Kerberos

  - by MichaelGG

  I'm building a simple WCF service, probably exposed via HTTPS, using NTLM security. Since not all users are going to be capable of using the service directly, we're writing a simple web front-end for the service. Users will auth with HTML to the web front-end. What we want is a way to delegate the user of the web site all the way to the WCF service. I understand Kerberos delegation can do this, but that's not available to us. What I want to do is make the web front-end account a specially trusted account, so that if a request hits the WCF service authenticated as "DOMAIN\WebApp", we read a WCF message header containing the real identity, then switch the principal to that and continue as normal. Is there any "simple" way of achieving this? Should I give up entirely on this idea, and instead make users "sign-in" to the WCF app and then do complete custom auth? The WCF extensibility and security options seem so vast, I'd like to get a heads up on which path to start heading down.

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• How to create a rails habtm that deletes/destroys without error?

  - by Bradley

  I created a simple example as a sanity check and still can not seem to destroy an item on either side of a has_and_belongs_to_many relationship in rails. Whenever I try to delete an object from either table, I get the dreaded NameError / "uninitialized constant" error message. To demonstrate, I created a sample rails app with a Boy class and Dog class. I used the basic scaffold for each and created a linking table called boys_dogs. I then added a simple before_save routine to create a new 'dog' any time a boy was created and establish a relationship, just to get things setup easily. dog.rb class Dog < ActiveRecord::Base has_and_belongs_to_many :Boys end boy.rb class Boy < ActiveRecord::Base has_and_belongs_to_many :Dogs def before_save self.Dogs.build( :name => "Rover" ) end end schema.rb ActiveRecord::Schema.define(:version => 20100118034401) do create_table "boys", :force => true do |t| t.string "name" t.datetime "created_at" t.datetime "updated_at" end create_table "boys_dogs", :id => false, :force => true do |t| t.integer "boy_id" t.integer "dog_id" t.datetime "created_at" t.datetime "updated_at" end create_table "dogs", :force => true do |t| t.string "name" t.datetime "created_at" t.datetime "updated_at" end end I've seen lots of posts here and elsewhere about similar problems, but the solutions are normally using belongs_to and the plural/singular class names being confused. I don't think that is the case here, but I tried switching the habtm statement to use the singular name just to see if it helped (with no luck). I seem to be missing something simple here. The actual error message is: NameError in BoysController#destroy uninitialized constant Boy::Dogs The trace looks like: /Library/Ruby/Gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:105:in const_missing' (eval):3:indestroy_without_callbacks' /Library/Ruby/Gems/1.8/gems/activerecord-2.3.4/lib/active_record/callbacks.rb:337:in destroy_without_transactions' /Library/Ruby/Gems/1.8/gems/activerecord-2.3.4/lib/active_record/transactions.rb:229:insend' ... Thanks.

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• looking for a license key algorithm.

  - by giulio

  There are a lot of questions relating to license keys asked on stackoverflow. But they don't answer this question. Can anyone provide a simple license key algorithm that is technology independent and doesn't required a diploma in mathematics to understand ? The license key algorithm is similar to public key encryption. I just need something simple that can be implemented in any platform .Net/Java and uses simple data like characters. Preferably no byte translations required. So if a person presents a string, a complementary string can be generated that is the authorisation code. Below is a common scenario that it would be used for. Customer downloads s/w which generates a unique key upon initial startup/installation. S/w runs during trial period. At end of trial period an authorisation key is required. Customer goes to designated web-site, enters their code and get authorisation code to enable s/w, after paying :) Don't be afraid to describe your answer as though you're talking to a 5 yr old as I am not a mathemtician. Just need a decent basic algorithm, we're not launching nukes... NB: Please no philosophy on encryption nor who is Diffie-Hellman. I just need a basic solution.

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• Delivery of JMS message before the transaction is committed

  - by ewernli

  Hi, I have a very simple scenario involving a database and a JMS in an application server (Glassfish). The scenario is dead simple: 1. an EJB inserts a row in the database and sends a message. 2. when the message is delivered with an MDB, the row is read and updated. The problem is that sometimes the message is delivered before the insert has been committed in the database. This is actually understandable if we consider the 2 phase commit protocol: 1. prepare JMS 2. prepare database 3. commit JMS 4. ( tiny little gap where message can be delivered before insert has been committed) 5. commit database I've discussed this problem with others, but the answer was always: "Strange, it should work out of the box". My questions are then: How could it work out-of-the box? My scenario sounds fairly simple, why isn't there more people with similar troubles? Am I doing something wrong? Is there a way to solve this issue correctly? Here are a bit more details about my understanding of the problem: This timing issue exist only if the participant are treated in this order. If the 2PC treats the participants in the reverse order (database first then message broker) that should be fine. The problem was randomly happening but completely reproducible. I found no way to control the order of the participants in the distributed transactions in the JTA, JCA and JPA specifications neither in the Glassfish documentation. We could assume they will be enlisted in the distributed transaction according to the order when they are used, but with an ORM such as JPA, it's difficult to know when the data are flushed and when the database connection is really used. Any idea?

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• looking for a license key algorithm.

  - by giulio

  There are alot of questions relating to license keys asked on stackoverflow. But they don't answer this question. Can anyone provide a simple license key algorithm that is technology independent and doesn't required a diploma in mathematics to understand ? The license key algorithm is similar to public key encryption. I just need something simple that can be implemented in any platform .Net/Java and uses simple data like characters. Written as Pseudo code is perfect. So if a person presents a string, a complementary string can be generated that is the authorisation code. Below is a common scenario that it would be used for. Customer downloads s/w which generates a unique key upon initial startup/installation. S/w runs during trial period. At end of trial period an authorisation key is required. Customer goes to designated web-site, enters their code and get authorisation code to enable s/w, after paying :) Don't be afraid to describe your answer as though you're talking to a 5 yr old as I am not a mathemtician.

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• Connect two client sockets

  - by Hernán Eche

  Good morning, let's say Java has two kind of sockets... server sockets "ServerSocket" client sockets or just "Socket" ////so Simple ! Imagine the situation of two processes: X Client <-- Y Server The server process Y : has a "ServerSocket", that is listening to a TCP port The client process X : send a connection request through a -client type- "Socket" X ////so Simple ! then the accept() method (in server Y) returns a new client type "Socket", when it occurs, great the two Sockets get "interconected", so the -client socket- in client process, is connected with the -client socket- in the server process then (reading/writing in socket X is like reading/writing in socket Y, and viceversa. ) TWO CLIENT SOCKETS GET INTERCONECTED!! ////so Simple ! BUT... (there is always a But..) What if I create the two CLIENT sockets in same process, and I want to get them "interconected" ? ////mmm Complex =(... even posible? Let's say how to have TWO CLIENT SOCKETS GET INTERCONECTED WITHOUT using an intermediate ServerSocket ? I 've solved it.. by creating two threads for continuously reading A and writing B, and other for reading B and writng A... but I think could be a better way..(or should!) (Those world-energy-consuming threads are not necessary with the client-server aproach) Any help or advice would be appreciated!! Thanks

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• Export SWC from Flash and Access Child from Flex

  - by php html

  I'm creating an actionscript project in Flex Builder. I succeed to export from Flash a SWC file, and to use it succesfully in Flex. I have a good programming background and Flex looks very simple for me, but I have difficult times in flash. I'm trying to achieve something that might be very simple(not for me of course): I create a simple shape in Flash, convert it to symbol. Then I create a TextField. The I select both the elements and convert them to another symbol, and Export it as a movieclip in swc. In flex I want to change the value from the textfield. How should I do? I'm trying to do: var t:ExportedMC = new ExportedMC(); t....(what should I write here) As I mentioned when I open flash I feel like an elephant in a porcelain store. I have 2 questions here: - how to assign a name to the textfield in flash? I'm using CS4. - how to access it as a child in flex?

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• PRISM - Creating mouseoverbehavior causes a Silverlight library to not be visible in main Silverligh

  - by RHLopez

  Created a simple Silverlight 4 application (SimpleApp) then added a Silverlight 4 library (LibraryA). Added code to the library (LibraryA) to implement MouseOverBehavior by inheriting from CommandBaseBehavior along with the appropriate attached property class/methods. Added reference in SimpleApp to LibraryA and went to MainPage.xaml to add namespace reference but it does not show up with Intellisense. Typing the namespace manually and then adding the attached MouseOver command works as it should as far as intellisense showing my attached property name, i.e. ... commands:MouseOver.Command="{Binding MousedOver}". However when I try to run it I get a XAML parser error saying that the "Command" attached property does not exist in MouseOver. If I move my class definitions from LibraryA to SimpleApp then everything works. I removed everything from LibraryA and just put one class with this in it: public class MouseOverBehavior : CommandBehaviorBase<Control> { public MouseOverBehavior(Control element) : base(element) {} } With this simple class in LibraryA it will not show up in XAML intellisense in SimpleApp. XAML intellisense works with other libraries that I have written that don't use PRISM. Don't know what I am missing hopefully it's something simple. I am using the latest SL4 build for PRISM change set 42969. Visual Studio 2010 RTM Professional in Windows 7 Ultimate 64-bit.

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• jQuery .load() and sub-pages

  - by user354051

  Hi, I am not just a newbie with Javascript. I am developing a simple site to get my hands on web programming. The web site is simple and structure is like this: A simple ul/li/css based navigation menu Sub pages are loaded in "div" using jQuery, when ever user click appropriate menu item. Some of the sub-pages are using different jQuery based plugins such as LightWindow, jTip etc. The jQuery function that loads the sub-page is like this: function loadContent(htmlfile){ jQuery("#content").load(htmlfile); }; The menu items fires loadContent method like this: <li><a href="javascript:void(0)" onclick="loadContent('overview.html');return false">overview</a></li> This loads a sub-page name "overview.html" inside the "div". That's it. Now this is working fine but some of the sub-pages using jQuery based plugins are not working well when loaded inside the "div". If you load them individually in the browser they are working fine. Based on above I have few qustions: Most of the plugins are based on jQuery and sub-pages are loaded inside the "index.html" using "loadContent" function. Do I have to call <script type="text/javascript" src="js/jquery-1.4.2.min.js"></script> on each and every sub-page? If a page is using a custom jQuery plugin, then where do I call it? In "index.html" or on the page where I am using it? I think what ever script you will call in "index.html", you don't to have call them again in any of the sub pages you are using. Am I right here? Thanks Prashant

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• Object oriented design of game in Java: How to handle a party of NPCs?

  - by Arvanem

  Hi folks, I'm making a very simple 2D RPG in Java. My goal is to do this in as simple code as possible. Stripped down to basics, my class structure at the moment is like this: Physical objects have an x and y dimension. Roaming objects are physical objects that can move(). Humanoid objects are roaming objects that have inventories of GameItems. The Player is a singleton humanoid object that can hire up to 4 NPC Humanoids to join his or her party, and do other actions, such as fight non-humanoid objects. NPC Humanoids can be hired by the Player object to join his or her party, and once hired can fight for the Player. So far I have given the Player class a "party" ArrayList of NPC Humanoids, and the NPC Humanoids class a "hired" Boolean. However, my fight method is clunky, using an if to check the party size before implementing combat, e.g. public class Player extends Humanoids { private ArrayList<Humanoids> party; // GETTERS AND SETTERS for party here //... public void fightEnemy(Enemy eneObj) { if (this.getParty().size() == 0) // Do combat without party issues else if (this.getParty().size() == 1) // Do combat with party of 1 else if (this.getParty().size() == 2) // Do combat with party of 2 // etc. My question is, thinking in object oriented design, am I on the right track to do this in as simple code as possible? Is there a better way?

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• Problem calling web service from within JBOSS EJB Service

  - by Rob Goodwin

  I have a simple web service sitting on our internal network. I used SOAPUI to do a bit of testing, generated the service classes from the WSDL , and wrote some java code to access the service. All went as expected as I was able to create the service proxy classes and make calls. Pretty simple stuff. The only speed bump was getting java to trust the certificate from the machine providing the web service. That was not a technical problem, but rather my lack of experience with SSL based web services. Now onto my problem. I coded up a simple EJB service and deployed it into JBoss Application Server 4.3 and now get the following error in the code that previously worked. 12:21:50,235 WARN [ServiceDelegateImpl] Cannot access wsdlURL: https://WS-Test/TestService/v2/TestService?wsdl I can access the wsdl file from a web browser running on the same machine as the application server using the URL in the error message. I am at a loss as to where to go from here. I turned on the debug logs in JBOSS and got nothing more than what I showed above. I have done some searching on the net and found the same error in some questions, but those questions had no answers. The web services classes where generated with JAX-WS 2.2 using the wsimport ant task and placed in a jar that is included in the ejb package. JBoss is deployed in RHEL 5.4, where the standalone testing was done on Windows XP.

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• How do I use a custom authentication mechanism for a Java web application with Spring Security?

  - by Adam

  Hi, I'm working on a project to convert an existing Java web application to use Spring Web MVC. As a part of this I will migrate the existing log-on/log-off mechanism to use Spring Security. The idea at this stage is to replicate the existing functionality and replace only the web layer, leaving the service classes and objects in place. The required functionality is simple. Access is controlled to URLs and to access certain pages the user must log on. Authentication is performed with a simple username and password along with an extra static piece of information that comes from the login page. There is no notion of a role: once a user has logged on they have access to all of the pages. Behind the scenes, the service layer has a class with a simple authentication method: doAuthenticate(String username, String password, String info) throws ServiceException An exception is thrown if the login fails. I'd like to leave this existing service object that does the authentication intact but to "plug it into" the Spring Security mechanism. Can somebody suggest the best approach to take for this please? Naturally, I'd like to take the path of least resistance and leave the work where possible to Spring... Thanks in advance, Adam.

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• Embedding Lua functions as member variables in Java

  - by Zarion

  Although the program I'm working on is in Java, answering this from a C perspective is also fine, considering that most of this is either language-agnostic, or happens on the Lua side of things. In the outline I have for the architecture of a game I'm programming, individual types of game objects within a particular class (eg: creatures, items, spells, etc.) are loaded from a data file. Most of their properties are simple data types, but I'd like a few of these members to actually contain simple scripts that define, for example, what an item does when it's used. The scripts will be extremely simple, since all fundamental game actions will be exposed through an API from Java. The Lua is simply responsible for stringing a couple of these basic functions together, and setting arguments. The question is largely about the best way to store a reference to a specific Lua function as a member of a Java class. I understand that if I store the Lua code as a string and call lua_dostring, Lua will compile the code fresh every time it's called. So the function needs to be defined somehow, and a reference to this specific function wrapped in a Java function object. One possibility that I've considered is, during the data loading process, when the loader encounters a script definition in a data file, it extracts this string, decorates the function name using the associated object's unique ID, calls lua_dostring on the string containing a full function definition, and then wraps the generated function name in a Java function object. A function declared in script run with lua_dostring should still be added to the global function table, correct? I'm just wondering if there's a better way of going about this. I admit that my knowledge of Lua at this point is rather superficial and theoretical, so it's possible that I'm overlooking something obvious.

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• [UNIX] Sort lines of massive file by number of words on line (ideally in parallel)

  - by conradlee

  I am working on a community detection algorithm for analyzing social network data from Facebook. The first task, detecting all cliques in the graph, can be done efficiently in parallel, and leaves me with an output like this: 17118 17136 17392 17064 17093 17376 17118 17136 17356 17318 12345 17118 17136 17356 17283 17007 17059 17116 Each of these lines represents a unique clique (a collection of node ids), and I want to sort these lines in descending order by the number of ids per line. In the case of the example above, here's what the output should look like: 17118 17136 17356 17318 12345 17118 17136 17356 17283 17118 17136 17392 17064 17093 17376 17007 17059 17116 (Ties---i.e., lines with the same number of ids---can be sorted arbitrarily.) What is the most efficient way of sorting these lines. Keep the following points in mind: The file I want to sort could be larger than the physical memory of the machine Most of the machines that I'm running this on have several processors, so a parallel solution would be ideal An ideal solution would just be a shell script (probably using sort), but I'm open to simple solutions in python or perl (or any language, as long as it makes the task simple) This task is in some sense very easy---I'm not just looking for any old solution, but rather for a simple and above all efficient solution

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• Clean up domain list in Excel - regex / macros?

  - by Tim

  I have a huge spreadsheet of domains that I need to clean up as follows: Remove all http:// (simple replace all - "http://" with "") Remove any www. (simple replace all - "www." with "") Delete any sub-domains (delete the actual row completely, not just the subdomain from the url) Remove anything after the domain extension (i.e. website.com/blah/blahbah/ becomes just website.com (simple replace all - "/*" with "", then replace all "/" with "") So what I'm left with is just a spreadsheet of clean domains like "website.com". I think I've got 1, 2 and 4 sorted (as above), but I'm really struggling with 3. Any ideas? Can I do this with regexp / vba, and actually delete the row completely? Sample data: http://www.scholastic.com/kids/stacks/games/ http://imgworld.teamworkonline.com/ http://topfreegraphics.com/ http://www.workcircle.co.uk/ http://www.healthycanadians.gc.ca/index-eng.php http://gsociology.icaap.org/methods/soft.html Post 1, 2 and 4 would leave me with: scholastic.com imgworld.teamworkonline.com topfreegraphics.com workcircle.co.uk healthycanadians.gc.ca gsociology.icaap.org It's those pesky sub-domains I need to just delete completely, just delete the row. I've realised I can't just search for 2 x ".", because obviously plenty of domain extensions (i.e .co.uk) include that. Any help appreciated.

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• Open PDF Content files in ASP.NET MVC 2

  - by mcbingo

  I want to provide simple href links to my PDF forms that reside in my Forms folder. I have a created a simple Index.aspx and FormController Index action that simple iterates through the list of PDF files using my FormMetaData.xml file. The links get created just fine but when you click on the links I get a 404 exception. That looks like this: Server Error in '/' Application. The resource cannot be found. Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly. Requested URL: /Forms/ccindteamgolfform.pdf Version Information: Microsoft .NET Framework Version:2.0.50727.4927; ASP.NET Version:2.0.50727.4927 This seems like this should open up a new browser window with the PDF in it but perhaps I am making a bad assumption. The PDF content files have Build Action of Content and Copy to Output set to Copy Always. Here is an example output html for the link from my Index.aspx page: <span class="form"> <a href="Forms/ccindteamgolfform.pdf" target="_blank"> <span class="description">Entry Form</span></span> I must be missing something because this does not work. Do I need to add a MapRoute for these documents? Or am I missing something else with the routing? This seems like it should not be that difficult.

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• Simplemodal AJAX

  - by Maxime

  Hello guys, I'm trying to implement Simplemodal on my website. Simple text boxes are really easy to do, but I can't find a way to have another page showing through AJAX. I know very little about Jquery and there is no documentation on how to do it, so could somebody help me? Thanks. This is the default code of a Simple Modal box: jQuery(function ($) { $('#basic-modal .basic').click(function (e) { $('#basic-modal-content').modal(); return false; });}); This is some code I took from the Simple Modal contact form that works with AJAX. I've been trying to tweak it but I don't really understand the structure of it. As I said, I'm completely new to Jquery. $.get("data/contact.php", function(data){ // create a modal dialog with the data $(data).modal({ closeHTML: "<a href='#' title='Close' class='modal-close'>x</a>", position: ["15%",], overlayId: 'contact-overlay', containerId: 'contact-container', onOpen: contact.open, onShow: contact.show, onClose: contact.close }); }); });

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• Objective-C: How to access methods in other classes

  - by Adam

  I have what I know is a simple question, but after many searches in books and on the Internet, I can't seem to come up with a solution. I have a standard iPhone project that contains, among other things, a ViewController. My app works just fine at this point. I now want to create a generic class (extending NSObject) that will have some basic utility methods. Let's call this class Util.m (along with the associated .h file). I create the Util class (and .h file) in my project, and now I want to access the methods contained in that class class from my ViewController. Here's an example of a simple version of Util.h #import <Foundation/Foundation.h> @interface Util : NSObject { } - (void)myMethod; @end Then the Util.m file would look something like this: #import "Util.h" @implementation Util - (void)myMethod { NSLog(@"myMethod Called"); } @end Now that my Util class is created, I want to call the "myMethod" method from my ViewController. In my ViewController's .h file, I do the following: #import "Util.h" @interface MyViewController : UIViewController { Util *utils; } @property (assign) Util *utils; @end Finally, in the ViewController.m, I do the following: #import "Util.h" @implementation MyViewController @synthesize utils; - (void)viewDidLoad { [super viewDidLoad]; utils.myMethod; //this doesn't work [utils myMethod]; //this doesn't work either NSLog(@"utils = %@", utils); //in the console, this prints "utils = (null)" } What am I doing wrong? I'd like to not only be able to directly reference other classes/methods in a simple util class like this, but I'd also like to directly reference other ViewControllers and their properties and methods as well. I'm stumped! Please Help.

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• UIView Login screen to tabbar logic

  - by Benjamin De Bos

  Folks, i'm having trouble with some navigation logic. Currently i have a simple two tabbed tabbar application. But i want to show a loginscreen in front. So that would be an UIView. Currently the code is as follows: - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; UIViewController *viewController1 = [[roosterViewController alloc] initWithNibName:@"roosterViewController" bundle:nil]; UIViewController *viewController2 = [[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil]; self.tabBarController = [[UITabBarController alloc] init]; self.tabBarController.viewControllers = @[viewController1, viewController2]; self.window.rootViewController = self.tabBarController; [self.window makeKeyAndVisible]; return YES; } SO this pushes a simple tabcontroller. Well, now i want to have a login screen. So that would be a simple UIView which pushes the tabbar controller. But i can't seem to see the logic on how to do this. I've been trying to present a modal view controller, but the thing is: the tabbar will be loaded on the background. Since i need the username/password information to work on the tabbarview, this won't work. My Logic would be: delegate load loginViewController load tabbar controller But, then i need to be able to "logout". So i need to destroy the tabbar controller and present the login screen. Any thoughts on this?

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• Unit testing opaque structure based C API

  - by Nicolas Goy

  I have a library I wrote with API based on opaque structures. Using opaque structures has a lot of benefits and I am very happy with it. Now that my API are stable in term of specifications, I'd like to write a complete battery of unit test to ensure a solid base before releasing it. My concern is simple, how do you unit test API based on opaque structures where the main goal is to hide the internal logic? For example, let's take a very simple object, an array with a very simple test: WSArray a = WSArrayCreate(); int foo = 5; WSArrayAppendValue(a, &foo); int *bar = WSArrayGetValueAtIndex(a, 0); if(&foo != bar) printf("Eroneous value returned\n"); else printf("Good value returned\n"); WSRelease(a); Of course, this tests some facts, like the array actually acts as wanted with 1 value, but when I write unit tests, at least in C, I usualy compare the memory footprint of my datastructures with a known state. In my example, I don't know if some internal state of the array is broken. How would you handle that? I'd really like to avoid adding codes in the implementation files only for unit testings, I really emphasis loose coupling of modules, and injecting unit tests into the implementation would seem rather invasive to me. My first thought was to include the implementation file into my unit test, linking my unit test statically to my library. For example: #include <WS/WS.h> #include <WS/Collection/Array.c> static void TestArray(void) { WSArray a = WSArrayCreate(); /* Structure members are available because we included Array.c */ printf("%d\n", a->count); } Is that a good idea? Of course, the unit tests won't benefit from encapsulation, but they are here to ensure it's actually working.

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• Reversible pseudo-random sequence generator

  - by user350651

  I would like some sort of method to create a fairly long sequence of random numbers that I can flip through backwards and forwards. Like a machine with "next" and "previous" buttons, that will give you random numbers. Something like 10-bit resolution (i.e. positive integers in a range from 0 to 1023) is enough, and a sequence of 100k numbers. It's for a simple game-type app, I don't need encryption-strength randomness or anything, but I want it to feel fairly random. I have a limited amount of memory available though, so I can't just generate a chunk of random data and go through it. I need to get the numbers in "interactive time" - I can easily spend a few ms thinking about the next number, but not comfortably much more than that. Eventually it will run on some sort of microcontroller, probably just an Arduino. I could do it with a simple linear congruential generator (LCG). Going forwards is simple, to go backwards I'd have to cache the most recent numbers and store some points at intervals so I can recreate the sequence from there. But maybe there IS some pseudo-random generator that allows you to go both forwards and forwards? It should be possible to hook up two linear feedback shift registers (LFSRs) to roll in different directions, no? Or maybe I can just get by with garbling the index number using a hash function of some sort? I'm going to try that first. Any other ideas?

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• javascript plugin - singleton pattern?

  - by Adam Kiss

  intro Hello, I'm trying to develop some plugin or/*and* object in javascript, which will control some properties over some object. It will also use jQuery, to ease development. idea This is in pseudocode to give you an idea, since I can't really describe it in english with the right words, it's impossible to go and use google to find out what I want to use (and learn). I will have plugin (maybe object?) with some variables and methods: plugin hideshow(startupconfig){ var c, //collection add: function(what){ c += what; }, do: function(){ c.show().hide().stop(); //example code } } and I will use it this way (or sort-of): var p = new Plugin(); p .add($('p#simple')) .add($('p#simple2')) .do(); note I'm not really looking for jQuery plugin tutorials - it's more like usage of singleton pattern in document in javascript, jQuery is mentione only because it will be used to modify dom and simplify selectors, jQuery plugin maybe just for that one little function add. I'm looking for something, that will sit on top of my document and call functions from itselft based on timer, or user actions, or whatever. problems I don't really know where to start with construction of this object/plugin I'm not really sure how to maintain one variable, which is collection of jQuery objects (something like $('#simple, #simple2');) I would maybe like to extedn jQuery with $.fn.addToPlugin to use chaining of objects, but that should be simple (really just each( p.add($(this)); )) I hope I make any sense, ideas, links or advices appreciated.

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• NHibernate slow mapping

  - by Rob A

  My question is what can I do to determine the cause of the slowness, or what can I do to speed it up without knowing the exact cause. I am running a simple query and it appears that the mapping back to the entities is taking taking forever. The result set is 350, which is not much data in my opinion. IRepository repo = ObjectFactory.GetInstance<IRepository>(); var q = repo.Query<Order>(item => item.Ordereddate > DateTime.Now.AddDays(-40)); foreach (var order in q) { Console.WriteLine(order.TransactionNumber); } The profiler is telling me it is executing the query 7ms / 35257ms, I am assuming that the former is the actual response from the db and the latter is the time it takes NH to do it's magic. 35 seconds is too long. This is a simple mapping, one table, nested components, using fluent interface to do mappings. I just start up a simple console app and run the one query, the slowness is measured after the SessionFactory is initialized, there should only be one session, and I am not using a transaction. Thanks

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• .net layered design: return error code to forms indicating which controls have an error

  - by David Casillas

  Let's say I have a simple application. It tries to add a new entry to a database grabing the info from the user. The information is a tipical MasterDetail objetc like an invoice. The Invoice object used to collect the data has some simple atributes (Id, Date, etc...) and a List of InvoiceDetail, consisting of some simple atributes (invoiceId, productId, quantity, etc...) A form in the UI Layer collects the data from the user, creates an instance of Invoice and sends it to the Bussiness Layer. The Bussines layer sends the data to a Validation Module. If any error in the input is detected it has to return some kind of error code. The Bussiness Layer has to send the error code back to the Form to let the user correct the worng information. I want the application to display some kind of warning (a different background color for example) in every form control with an error. ¿What's a good aproach to I manage the errors to be able to inform the form which controls are wrong? ¿Can I create an error object?¿Use delegates?. I'm using VB.net but don't think this is relevant to the solution of the problem. P.D: Please suggest me some tags to this post.

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• Retrieving and displaying a contact name from a contact id while using a SimpleCursorAdapter

  - by Henrique

  I am storing information on the phone's contacts using a sqlite database. The fields I am storing are: _id, contact_id, body where _id is the row's id, contact_id is the phone contact's id and body is just a simple text which is the actual information I am storing. I'm using a SimpleCursorAdapter to map the data to the view, like so: Cursor cursor = database.fetchInformation(); // fetch info from DB String[] from = new String[] { CONTACT_ID, BODY }; int[] to = new int[] { R.id.contact, R.id.body }; SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, R.layout.row, cursor, from, to); getListView().setAdapter(adapter); What I would actually want is to get the contact name that is associated with this CONTACT_ID, and have that be shown in the view. I can't seem to find a simple solution. I've tried implementing my own SimpleCursorAdapter and rewriting setViewText(TextView, String) but it didn't work. Also, it just seems overly complicated for such a simple task. Any help? Thanks.

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