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• Designing Web Service Using Ruby on Rails - Mapping ActiveRecord Models

  - by michaeldelorenzo

  I've put together a RoR application and would now like to publish a RESTful web service for interacting with my application. I'm not sure where to go exactly, I don't want to simply expose my ActiveRecord models since there is some data on each model that isn't needed or shouldn't be exposed via an API like this. I also don't want to create a SOAP solution. My application is built using Rails 2.3.5 and I hope to move to Rails 3.0 soon after its released. I'm basically looking for a way to map my ActiveRecord models to "models" that would be exposed via the web service. Is ActiveResource the correct thing to use? What about ActionWebService?

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• What does the "ApplicaionDirectory" Membership condition mean in .NET Code Access Security?

  - by smwikipedia

  I am not sure about the semantic of "ApplicationDirectory" membership condition. I am trying to use it in the .NET Framework 2.0 configuration tool. The tool's explanation to it is as below: The Application Directory membership condition is true for all assemblies in the same directory or in a child directory of the running application. Assemblies that meet this membership condition will be granted the permissions associated with this code group. All the other membership conditions such as strong name, hash, need me to input some criterias, only the Application Directory has not. How to use it? Could someone give an explanation by example? Many thanks.

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• Resin server giving 200 OK response but tomcat 6.0 not giving 404 Not Found

  - by Suryanarayan Panda

  Hi, We have an application running in resin. We are sending HTTP get and post request to this application & it gives 200 ok response with some text in the response body, as expected. But when same application deployed on tomcat6.0 ,and HTTP get and post request are made , the url gets excuted as expected ,but 404 not found response is coming with nothig in the response body. Can anybody please point out the issue ,and give suggetion what is going wrong.Its urgent Thanks in Advance. Surya

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• Problem with command line in windows

  - by Hoang Pham

  I copy the cmd.exe to a new location, then I run it to get the current directory location at that folder. But just recently, there is always this message: Impossibile trovare il testo del messaggio per il numero di messaggio 0x2350 nel file di messaggio per Application. Impossibile trovare il testo del messaggio per il numero di messaggio 0x2334 nel file di messaggio per Application. C:\cygwin\home\Hoang> Someone know how to solve it?

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• How do I use LDAP proxy user authentication from .net?

  - by DN

  I have a .net web application that uses simple bind to query the LDAP. The application uses integrated windows authentication. Do you have any recommendations on which option to use to authenticate against the LDAP: 1. simple LDAP bind using the logged in user's credentials 2. simple LDAP bind using a service account created for the application's use 3. LDAP proxy user authentication - I dont have enough info about this, so i'd be grateful if someone could explain it's benefit, recommended use and sample .net code to do the query.

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• Why aren't double quotes and backslashes allowed in strings in the JSON standard?

  - by Dan Herbert

  If I run this in a JavaScript console in Chrome or Firebug, it works fine. JSON.parse('"\u0027"') // Escaped single-quote But if I run either of these 2 lines in a Javascript console, it throws an error. JSON.parse('"\u0022"') // Escaped double-quote JSON.parse('"\u005C"') // Escaped backslash RFC 4627 section 2.5 seems to imply that \ and " are allowed characters as long as they're properly escaped. The 2 browsers I've tried this in don't seem to allow it, however. Is there something I'm doing wrong here or are they really not allowed in strings? I've also tried using \" and \\ in place of \u0022 and \u005C respectively. I feel like I'm just doing something very wrong, because I find it hard to believe that JSON would not allow these characters in strings, especially since the specification doesn't seem to mention anything that I could find saying they're not allowed.

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• Yahoo YQL Rate Limits

  - by catlan

  I'm a bit unsure about the Usage Information and Limits of Yahoo YQL. Per application limit (identified by your Access Key): 100,000 calls per day. Per IP limits: /v1/public/: 1,000 calls per hour; /v1/yql/: 10,000 calls per hour. Do I require an application/access key for the /v1/public/ interface, non of the examples uses one. If I don't need an application key and only access the /v1/public/ interface I only have do worry about the IP limits of 1,000 calls per hour, right?

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• Web scraping: how to get scraper implementation from text link?

  - by isme

  I'm building a java web media-scraping application for extracting content from a variety of popular websites: youtube, facebook, rapidshare, and so on. The application will include a search capability to find content urls, but should also allow the user to paste a url into the application if they already where the media is. Youtube Downloader already does this for a variety of video sites. When the program is supplied with a URL, it decides which kind of scraper to use to get the content; for example, a youtube watch link returns a YoutubeScraper, a Facebook fanpage link returns a FacebookScraper and so on. Should I use the factory pattern to do this? My idea is that the factory has one public method. It takes a String argument representing a link, and returns a suitable implementation of the Scraper interface. I guess the Factory would hold a list of Scraper implementations, and would match the link against each Scraper until it finds a suitable one. If there is no suitable one, it throws an Exception instead.

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• How reusable should ViewModel classes be?

  - by stiank81

  I'm working on a WPF application, and I'm structuring it using the MVVM pattern. Initially I had an idea that the ViewModels should be reusable, but now I'm not too sure anymore. Should I be able to reuse my ViewModels if I need similar functionality for a WinForms application? Silverlight doesn't support all things WPF does - should I be able to reuse for Silverlight applications? What if I want to make a Linux GUI for my application. Then I need the ViewModel to build in Mono - is this something I should strive for? And so on.. So; should one write ViewModel classes with one specific View in mind, or think of reusability?

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• Embedding .net remoting program in WEB

  - by flufferok

  So, here is a deal. I have client-server application(dotNet remoting). Client side has few trackbars, checkboxes, buttons and picturebox. Server is a console application and does only calculation from client. Client's picturebox make some visualisation of calculation in picturebox. All calulations and relative classes are in dll file. Now I have to embed client application in web site. All kind of technologies are accepted, but I want to minimize forces applied to embedding. So, what is the best way to do embedding?

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• Use same project to create multiple applications on same device

  - by Mark.Prof

  I am deploying a reader application with it's document packaged in the asset folder. Any branding is done by dynamically generating xml and resources as appropriate. The application name itself is also generated. Since it is the tag's "package" property that needs to be unique, I nevertheless have a problem installing more than one instance of this app. I would like to dynamically edit the manifest package attribute's value to reflect the document and brand that I am building. But this causes build problems, specifically the location of R.java is no longer available to the component package under which the code resides. Originally, the component package is the same as the application manifest package. But precisely this manifest package name is the part that needs to be variable. How should I best proceed?

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• Acquiring Table Lock in Database - Interview Question

  - by harigm

  One of my interview Questions, if multiple users across the world are accessing the application, in which it uses a Table which has a Primary Key as Auto Increment Field. The Question how can you prevent the other user getting the Same Primary key when the other user is executing? My answer was I will obtain the Lock on the table and I will make the user to wait Until that user is released with the Primary key. But the Question How do you acquire the Table lock programmatically and implement this? If there are 1000 users coming every minute to the application, if you explicity hold the lock on the table, then the application will become slower? How do you manage this? Please suggest the possible answers for the above question

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• Adding help button for each window

  - by Miraaj

  Hi all, I have found that user can associate help with his application using Help Viewer. Users typically launch Help Viewer by choosing the application help item from the Help menu, or by typing a query in the Spotlight For Help text field in the Help menu. I have some different requirement: I want to associate component specific help to my application, means that there will be a small '?' marked icon at bottom left corner of a window and when user clicks it, appropriate help page will open. This case is similar to 'print' panels where there is a small '?' icon. Can anyone suggest me some way to accomplish it, if it is possible? Thanks, Miraaj

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• Hosting a WCF service in a Windows service. Works, but I can't reach it from Silverlight.

  - by BaBu

  I've made me an application hosted WCF service for my Silverlight application to consume. When I host the WCF service in a forms application everything works fine. But when I host my WCF service in a windows service (as explained brilliantly here) I get the dreaded 'NotFound' Web Exception when I call it from Silverlight. The 'WCF Test Client' tool does not complain. I'm' exposing a decent clientaccesspolicy.xml at root. Yet Silverlight won't have it. I'm stumped. Anybody have an idea about what could be going on here?

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• What is this technique called in Java?

  - by ShaChris23

  I'm a C++ programmer, and I was reading this site when I came across the example below. What is this technique called in Java? How is it useful? class Application { ... public void run() { View v = createView(); v.display(); ... protected View createView() { return new View(); } ... } class ApplicationTest extends TestCase { MockView mockView = new MockView(); public void testApplication { Application a = new Application() { <--- protected View createView() { <--- return mockView; <--- whao, what is this? } <--- }; <--- a.run(); mockView.validate(); } private class MockView extends View { boolean isDisplayed = false; public void display() { isDisplayed = true; } public void validate() { assertTrue(isDisplayed); } } }

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• MooTools events not firing in IE8

  - by gregory

  I have a Mootools asset created like so: // Create a new asset var asset = new Asset.image(path, { title: this.language.download, events: {click: this.download.bind(this, link)}, }); I have a method of a MooTools object defined as such: download: function(e) { // The path to download console.log('download: ' + e); }, In Firefox the console.log print shows up. In IE8, however, I have no luck. Am I missing something? Any tips or advice would be greatly appreciated. TIA!

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• Django doctests in views.py

  - by Brian M. Hunt

  The Django documentation on tests states: For a given Django application, the test runner looks for doctests in two places: The models.py file. You can define module-level doctests and/or a doctest for individual models. It's common practice to put application-level doctests in the module docstring and model-level doctests in the model docstrings. A file called tests.py in the application directory -- i.e., the directory that holds models.py. This file is a hook for any and all doctests you want to write that aren't necessarily related to models. Out of curiosity I'd like to know why Django's testrunner is limited to the doctests in models.py, but more practically I'd like to know how one could expand the testrunner's doctests to include (for example) views.py and other modules when running manage.py test. I'd be grateful for any input. Thank you. Brian

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• Is adding indexes to a SQL Server ever a bad idea?

  - by Aerik

  We have a mid-size SQL Server based application that has no indexes defined. Not even on the the identity columns. I suggested to our moderately expensive application consultant that perhaps we might get better performance (particularly as our database grows) by creating some indexes on appropriate fields, and he said: "Indexes will significantly impact other areas of the application and customers should not create them under any circumstances." Anybody ever heard of anything like this? Are there ever circumstances where one should not create any indexes? I can see nothing special about this app - it's got int identity columns, then lots of string columns, bunch of relational tables but nothing special or weird that I can see. Thanks!

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• Debug .Net Framework's source code only shows disassembly in Visual Studio 2010

  - by jdecuyper

  Hi! I'm trying to debug .Net Framework's source code using Visual Studio 2010 Professional. I followed the steps described in Raj Kaimal's post but I must be doing something wrong since the only code I'm getting to see is the disassembly code: As you can see in the image, the Go to Source Code and the Load Symbols options are disabled. Nevertheless, symbols are downloaded from Microsoft's server since I can see them inside the local cache directory. The code I'm debugging goes as follow: var wr = WebRequest.Create("http://www.google.com"); Console.WriteLine("Web request created"); var req = wr.GetRequestStream(); Console.Read(); When I hit F11 to step into the first line of code, a window pops us looking for the "WebRequst.cs" file inside "f:\dd\ndp\fx\src\Net\System\Net\WebRequest.cs" which does not exists on my machine. What am I missing? Thanks a lot for your help.

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• MS SQL 2005/2008: Identify current user

  - by Torben H.

  Hello I have a web application, which is using a MS SQL 2005 database. My problem is, that the application has no rolemanagement. So the application always accesses the database with one default user. But now I have to save and access a value only for the current user. Is there any way to do this? Maybe something like a session on the webserver? The best way would be, if there is any possibility to access the current session id of the webserver from T-SQL. Do anyone understand my problem? :) Torben

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• How to create a custom ADO Multi Dimensional Catalog with no database

  - by Alan Clark

  Does anyone know of an example of how to dynamically define and build ADO MD (ActiveX Data Objects Multidimensional) catalogs and cube definitions with a set of data other than a database? Background: we have a huge amount of data in our application that we export to a database and then query using the usual SQL joins, groups, sums etc to produce reports. The data in the application is originally in objects and arrays. The problem is the amount of data is so large the export can take 2 hours. So I am trying to figure out a good way of querying the objects in memory, either by a custom OLAP algorithm or library, or ADO MD. But I haven't been able to find an example of using ADO MD without a database behind it. We are using Delphi 2010 so would use ADO ActiveX but I imagine the ADO.NET MD is similar. I realize that if the application data was already stored in a database the problem would solve itself. Also if Delphi had LINQ capability I could query the objects and arrays that way.

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• Using multiple PaaS Vendors

  - by jpabluz

  I am developing a SaaS App, and I want to decide for a PaaS Vendor. Since one of my biggest concerns is uptime, is there an application or service, that allows me to use several PaaS Vendors (like Azure, Google App Engine, Amazon Web Services, etc.)? I want my application to be able to respond from one PaaS Vendor to another almost instantly without any downtime, to use the redundancy that this provides. This means that I need to be able to use the different services homogeneously.

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• Can I import sql with php?

  - by shin

  Please bear with me(beginner). I am planning to set up an application where visitors can login and play/mess around with my application. So I want to refresh my php application once a day with a cron job. But I never wrote a cron job script before. I understand that I have to truncate all the tables/data and add the initial data. With phpmyadmin, I can import data. Is there any way I can import sql file after truncate the tables? What is the best way? Do I have to create table and insert all data? Help and resources will be appreciated. Thanks in advance.

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• Is there a way to tell JVM to optimize my code before processing?

  - by Rogach

  I have a method, which takes much time to execute first time. But after several invocations, it takes about 30 times less time. So, to make my application respond to user interaction faster, I "warm-up" this method (5 times) with some sample data on initialization of application. But this increases app start-up time. I read, that JVM's can optimize and compile my java code to native, thus speeding things up. I wanted to know - maybe there is some way to explicitly tell JVM that I want this method to be compiled on startup of application?

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• Show UIAlertView that is same as UIRemoteNotification when app is running in foreground

  - by Sidwyn Koh

  I understand that we can handle push notifications via the method: - (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo and we can check if the app was running in the foreground: if (application.applicationState == UIApplicationStateActive ) { ... } How do we show the exact same notification with localisation? NSString *message = [[[userInfo valueForKey:@"aps"] valueForKey:@"alert"] valueForKey:@"loc-key"]; NSString *trueMessage = NSLocalizedString(message, nil); UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Alert" message:trueMessage cancelButtonItem:@"OK" otherButtonItems:@"Show", nil]; [alertView show]; This shows the raw unlocalized text, e.g. "You have a new alert from %1@ on %2@." My question is, how can we place the loc-args inside the UIAlertView as well, when the app is running in the foreground?

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