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• How to access uploaded files in Ruby

  - by Jeff King

  I am trying use a Java Uploader in a ROR app (for its ease of uploading entire directories). The selected uploader comes with some PHP code that saves the files to the server. I am trying to translate this code to Ruby, but am stumped on this point: PHP has a very convenient superglobal – $_FILES – that contains a hash of all files uploaded to the current script via the HTTP POST method. It appears Ruby does not have a similar resource. Lacking that, what is the best way to access and save the uploaded files? I am using the JavaPowUpload uploader ( http://www.element-it.com/OnlineHelpJavaPowUpload/index.html ).

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• How do I parse JSON from a Java HTTPResponse?

  - by Joe Ludwig

  I have an HttpResponse object for a web request I just made. The response is in the JSON format, so I need to parse it. I can do it in an absurdly complex way, but it seems like there must be a better way. Is this really the best I can do? HttpResponse response; // some response object Reader in = new BufferedReader( new InputStreamReader(response.getEntity().getContent(), "UTF-8")); StringBuilder builder= new StringBuilder(); char[] buf = new char[1000]; int l = 0; while (l >= 0) { builder.append(buf, 0, l); l = in.read(buf); } JSONTokener tokener = new JSONTokener( builder.toString() ); JSONArray finalResult = new JSONArray( tokener ); I'm on Android if that makes any difference.

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• WCF Data Services consuming data from EF based repository

  - by John Kattenhorn

  We have an existing repository which is based on EF4 / POCO and is working well. We want to add a service layer using WCF Data Services and looking for some best practice advice. So far we have developed a class which has a IQueryable property and the getter triggers the repository 'get all users' method. The problem so far have been two-fold: 1) It required us to decorate the ID field of the poco object to tell data service what field was the id. This now means that our POCO object is not 'pure'. 2) It cannot figure out the relationships between the objects (which is obvious i guess). I've now stopped this approach and i'm thinking that maybe we should expose the OBjectContext from the repository and use more 'automatic' functionality of EF. Has anybody got any advice or examples of using the repository pattern with WCF Data Services ?

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• Symfony2: automatically logging in users from their Windows session

  - by Paul Maclean

  In Symfony2 I have built an intranet. It currently uses the FOSUserBundle and an LDAP bundle to log users in, and I would like to add the functionality to log in user from their session in Windows. I found an NTLM script for PHP and an updated version of it, but I haven't been able to incorporate them into Symfony2. I also found an NTLM bundle for Symfony2, but it was written for an older version of Symfony and it is not maintained anymore. I was unable to rewrite it and get it to work. My question is; how could I automatically log in users from their Windows session in my Symfony2-app, in addition to the already present LDAP functionality? What would be the best and easiest way?

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• chat application: pubsubhub vs xmpp

  - by sofia

  I'm unsure on the best stack to build a chat application. Currently I'm thinking of two main options: facebook tornado cons: does not use the main chat protocol xmpp but pubsubhubbub pros: i really like its simplicity for development (webserver + webframework); pubsubhubbub also seems simpler as a protocol than xmpp; and i know python xmpp + bosch, punjab, ejabberd cons: don't know erlang; overall seems a bit harder to develop pros: uses xmpp protocol The chat app will need to have the following: Private messages Public rooms Private rooms Chat history for rooms (not forever, just the last n messages) html embedding url to chat room Both options seem scalable so that's not really my worry (we're thinking of running the app in amazon's ec2 as well). I know there's a project that builds a xmpp server using tornado but it's not ready for production use and our deadline isn't that big. Basically my main worry is ease of development vs somehow regretting later using pubsubhubbub to develop a chat app but I read somewhere that PubSubHubbub might eventually replace XMPP as REST replaced SOAP - so what do you think?

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• Database theory - relationship between two tables

  - by iansinke

  I have a database with two tables - let's call them Foo and Bar. Each foo may be related to any number of bars, and each bar may be related to any number of foos. I want to be able to retrieve, with one query, the foos that are associated with a certain bar, and the bars that are associated with a certain foo. My question is, what is the best way of recording these relationships? Should I have a separate table with records of each relationship (e.g. two columns, foo and bar)? Should the foo table have a column for a list of bars, and vice versa? Is there another option that I'm overlooking? I'm using SQL Server, if that makes a difference.

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• Javascript || or operator with a undefinded variable

  - by bryan sammon

  I have been doing some reading lately one article I read was from Opera. http://dev.opera.com/articles/view/javascript-best-practices/ In that article they write this: Another common situation in JavaScript is providing a preset value for a variable if it is not defined, like so: if(v){ var x = v; } else { var x = 10; } The shortcut notation for this is the double pipe character: var x = v || 10; For some reason I cant get this to work for me. Is it really possible to check to see if v is defined, if not x = 10? --Thanks. Bryan

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• issues horizontal scrolling using jQuery.ScrollTo / jQuery.SerialScroll

  - by kapil.israni

  Hi, I am trying to develop auto horizontal scrolling for our website using - jQuery.ScrollTo / jQuery.SerialScroll. I am not sure if this is the best jquery library to do that, but if there's something better, please let me know. Here's the behavior that I want, check out foursquare's "Recent Activity" list. The data that will refresh will come from a ajax request that I make every few seconds using window.setInterval. I am not really a CSS/java script guy so I havent been able to figure out jQuery.SerialScroll. Here's the website - look at the "Live job Feeds" list. Currently the list does refresh the data coming from the ajax call, but I dont see the effect, the animation, in fact I dont even think serialScroll is being used. Right now I am doing a - $('#feed-ticker').prepend(content) to pre-append the newly arrived data. You can do a view source to look at the current code. Any help would be really appreciated. Thanks.

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• Memory efficient way of inserting an array of objects with Core Data

  - by randombits

  I'm working on a piece of code for an iPhone application that fetches a bunch of data from a server and builds objects from it on the client. It ends up creating roughly 40,000 objects. They aren't displayed to the user, I just need to create instances of NSManagedObject and store them to persistent storage. Am I wrong in thinking that the only way to do this is to create a single object, then save the context? is it best to create the objects all at once, then somehow save them to the context after they're created and stored in some set or array? If so, can one show some example code for how this is done or point me in the direction to code where this is done? The objects themselves are relatively straight forward models with string or integer attributes and don't contain any complex relationships.

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• How to make developers follow coding standards?

  - by Josh

  How can I make developers follow coding standards? In our company: I've given documents and they don't have the patience to read it and follow it. I've tried telling them again and again "please do it this way" they nod their heads, but still do it the wrong way We're doing a project for the third time and still they don't seem to follow it properly. I'm now so tired of this. What is the best way to set standards for coding and make sure they follow them? Edit: There are just about 10 developers in my team. They're over pressurized and do not take the time to put comments and do the code neatly since there's more pressure to complete the product from our management. What would be the solution for this?

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• Cannot convert the value in attribute '[attr]' to object of type 'System.Windows.TemplateBindingExte

  - by Krimson

  Hi, I get this error when I define my attached dependency properties in a class outside the class hierarchy and set the owner to a common parent class. Attached dependency property in WindowBase class (outside class hierarchy = generated error): public static readonly DependencyProperty AreaColorProperty = DependencyProperty.RegisterAttached("AreaColor", typeof(AreaColor), typeof(Window)); TemplateBinding that fails {TemplateBinding local:WindowBase.AreaColor} If I instead define the attached dependency property in a class within the class heirarchy and set the owner to this class, then I don't get any errors, why is this? Attached dependency property in WindowBase (within class hierarchy = no errors): public static readonly DependencyProperty AreaColorProperty = DependencyProperty.RegisterAttached("AreaColor", typeof(AreaColor), typeof(WindowBase)); Best Regards, Jesper

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• java annotations: library to override annotations with xml files

  - by flybywire

  Java has annotations and that is good. However, some developers feel that it is best to annotate code with metadata using xml files - others prefer annotations but would use metadata to override annotations in source code. I am writing a Java framework that uses annotations. The question is: is there a standard way to define and parse metadata from xml files. I think this is something every framework that uses annotations could benefit from but I can seem to find something like this on the Internet. Must I roll my own xml parsing/validation or has someone already done something like this?

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• creating new usercontrols at runtime in ASP.NET MVC

  - by Paul Connolly

  Hi everyone, My situation is that the user is creating an entity on my site which contains the particlars of the driectors of that company, name address etc.. The Director form is a separate user control with the appropriate textboxes etc. At run time we don't know how many of these directors there will be so I need one to be able to use something like an "ADD DIRECTOR" or "DELETE DIRECTOR" button which will present or delete the another usercontrol to add the additional director. Currently I am trying to make this happen within a pane of the JQuery Accordion control. I have looked many places for how to do this but to no avail. Can anyone tell me where I might find some inforamation about how I can do this? All the best Paul

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• How can I convert Perl one-liners into complete scripts?

  - by Stefan Lasiewski

  I find a lot of Perl one-liners online. Sometimes I want to convert these one-liners into a script, because otherwise I'll forget the syntax of the one-liner. For example, I'm using the following command (from nagios.com): tail -f /var/log/nagios/nagios.log | perl -pe 's/(\d+)/localtime($1)/e' I'd to replace it with something like this: tail -f /var/log/nagios/nagios.log | ~/bin/nagiostime.pl However, I can't figure out the best way to quickly throw this stuff into a script. Does anyone have a quick way to throw these one-liners into a Bash or Perl script?

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• Accessing html form input type=text using jquery from a windows forms webbrowser-control

  - by simply-tom

  I have two elements on my Windows Forms application: Webbrowser-Control Button Inside of the webbrowser-control I show a very simple html-form with two input type=text. I press the button and get access to both text fields. Last year at the Qt developer conference there was a quite good presentation: http://labs.trolltech.com/blogs/2009/04/17/jquery-and-qwebelement/ void highlightAllLinks() { QString code = "$('a').each( function () { $(this).css('background-color', 'yellow') } )"; view-page()-mainFrame()-evaluateJavaScript(code); } But I have to do this with .net and Windows Forms. Anyone knowing a good tutorial? Best regards,Tom

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• Understanding what SPARQL is

  - by user73119

  This is a terribly beginner series of questions, but after reading through a good 30 SPARQL tutorials I can't seem to wrap my head around what SPARQL is or how to begin using it. Is it executed on the client side? Is microsoft somehow going to be able to mess this up? Can you use a common relational database (SQL)? Are there particular resources you recommend over others for learning? Do you feel it is premature to begin investing myself in this? Best way to get set up and running to start tinkering? The RDFA examples I have seen are very inspiring. I am currently a big proponent of using microformats but would really like to take it further. I currently develop in PHP, but have only found a Java library.

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• Parse an HTTP request Authorization header with Python

  - by Kris Walker

  I need to take a header like this: Authorization: Digest qop="chap", realm="[email protected]", username="Foobear", response="6629fae49393a05397450978507c4ef1", cnonce="5ccc069c403ebaf9f0171e9517f40e41" And parse it into this using Python: {'protocol':'Digest', 'qop':'chap', 'realm':'[email protected]', 'username':'Foobear', 'response':'6629fae49393a05397450978507c4ef1', 'cnonce':'5ccc069c403ebaf9f0171e9517f40e41'} Is there a library to do this, or something I could look at for inspiration? I'm doing this on Google App Engine, and I'm not sure if the Pyparsing library is available, but maybe I could include it with my app if it is the best solution. Currently I'm creating my own MyHeaderParser object and using it with reduce() on the header string. It's working, but very fragile. Brilliant solution by nadia below: import re reg = re.compile('(\w+)[=] ?"?(\w+)"?') s = """Digest realm="stackoverflow.com", username="kixx" """ print str(dict(reg.findall(s)))

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• Which ORM to use with SQL Azure?

  - by Jamie Chapman

  Just wondering what everyones thoughts on what ORM to use for SQL Azure? I'm fairly comfortable using LINQ-to-SQL and I believe it is possible to get it working with SQL Azure. However, from my understanding (correct me if I'm wrong), no further improvements will be made to Linq-to-SQL in future releases of the .NET framework? Alternatively, there is the entity framework... and further afield from the Microsoft Camp is NHibernate. Ideally, any additional suggestions made should be free or open source. I have seen Telerik's ORM but this of course, is a commercial product. I can get the definitions/benefits of each ORM myself by doing a Google search, but I was just interested in peoples opinions as to which ORM seems to work best for them (even if it is none of the above).

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• WinForms - Localization - UI controls positions different in additional Culture

  - by binball

  Hi, I did my UI settings.Original language is English. After that I set Localizable property to True. Copied original resx file to frmMain.de-De.resx (for example). Translated all strings. Everything works. But now I would like to change positions of controls. After that changes are visible only for original/primary Culture (En). When I change Culture to de-De then UI controls are on the "old positions"(?!) Is this normal behaviour? :O I'm unable to change controls positions on my form after localization? Can someone explain me this and give some best solution. I really have to change UI design but I don't want to manual copy all translated strings again. If my description is not clear then I can post source code, just please let me know. I use VS 2008. Greetz!

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• How can I get TFS 2010 to build each project to a separate directory?

  - by Jonathan Schuster

  In our project, we'd like to have our TFS build put each project into its own folder under the drop folder, instead of dropping all of the files into one flat structure. To illustrate, we'd like to see something like this: DropFolder/ Foo/ foo.exe Bar/ bar.dll Baz baz.dll This is basically the same question as was asked here, but now that we're using workflow-based builds, those solutions don't seem to work. The solution using the CustomizableOutDir property looked like it would work best for us, but I can't get that property to be recognized. I customized our workflow to pass it in to MSBuild as a command line argument (/p:CustomizableOutDir=true), but it seems MSBuild just ignores it and puts the output into the OutDir given by the workflow. I looked at the build logs, and I can see that the CustomizableOutDir and OutDir properties are both getting set in the command line args to MSBuild. I still need OutDir to be passed in so that I can copy my files to TeamBuildOutDir at the end. Any idea why my CustomizableOutDir parameter isn't getting recognized, or if there's a better way to achieve this?

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• Good GUI Design Tool to mock up iPhone & Android applications

  - by Peter Delaney

  I am about to embark on developing a mobile application for both the iPhone and the Android based phone. I have most of my gui mock ups written down on a white board and some in my head. I need to put them down on paper so I can relay my designs to others in my team. I was wondering what the best on-line gui mockup tool I could use? I have a lot of experience with Visio and I truly like it. I want a tool that would be web based so I could collaborate with others on the team. Does anyone have a suggestion for an easy gui mockup tool that I could use?

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• UIScrollView issue with autorotation and content scaling

  - by boliva

  Hi, I'm building a new (autorotating) iPad app that consists mainly of a screen sized UIScrollView that contains an UIImageView for an image which is 5 times the iPad screen resolution while in portrait mode (3840x1024). What I haven't been able to accomplish is that whenever the device rotates (to whichever orientation) the imageView bounds and the scrollView contentSize asjusts the image for the new height (maintaining its aspect ratio), making the height of the image to always fit the device height for the given orientation (so in the particular case of this image, it would get shown as 2880x768). I tried different combinations of autoresizingMask and contentMode for the imageView but the closer I've been able to get is to effectively display the image at the desired size but with a white padding around it and into the scrollView content (to make up for the original orientation contentSize). I also tried recalculating the scrollView contentSize in the didRotate.../viewWillAnimate... rotation-related methods in my viewController class, with no avail. Best regards and thanks for your time

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• Composite Key Dictionary

  - by AaronLS

  I have some objects in List, let's say List<MyClass> and MyClass has several properties. I would like to create an index of the list based on 3 properties of of MyClass. In this case 2 of the properties are int's, and one property is a datetime. Basically I would like to be able to do something like: Dictionary< CompositeKey , MyClass > MyClassListIndex = Dictionary< CompositeKey , MyClass >(); //Populate dictionary with items from the List<MyClass> MyClassList MyClass aMyClass = Dicitonary[(keyTripletHere)]; I sometimes create multiple dictionaries on a list to index different properties of the classes it holds. I am not sure how best to handle composite keys though. I considered doing a checksum of the three values but this runs the risk of collisions.

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• Silverlight DataGrid set cell IsReadOnly programatically

  - by Brandon Montgomery

  I am binding a data grid to a collection of Task objects. A particular column needs some special rules pertaining to editing: <!--Percent Complete--> <data:DataGridTextColumn Header="%" ElementStyle="{StaticResource RightAlignStyle}" Binding="{Binding PercentComplete, Mode=TwoWay, Converter={StaticResource PercentConverter}}" /> What I want to do is set the IsReadOnly property only for each task's percent complete cell based on a property on the actual Task object. I've tried this: <!--Percent Complete--> <data:DataGridTextColumn Header="%" ElementStyle="{StaticResource RightAlignStyle}" Binding="{Binding PercentComplete, Mode=TwoWay, Converter={StaticResource PercentConverter}}" IsReadOnly={Binding IsNotLocalID} /> but apparently you can't bind to the IsReadOnly property on a data grid column. What is the best way do to do what I am trying to do?

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• X.509 Certificate validation with Java and Bouncycastle

  - by Rob

  Hi, through the bouncycastle wiki page I was able to understand how to create a X.509 root certificate and a certification request, but I do not quite understand how to proceed concept- and programming wise after that. Lets assume party A does a cert request and gets his client certificate from the CA. How can some party B validate A's certificate? What kind of certificate does A need? A root certificate? A 'normal' client certificate? And how does the validation work on programming level, if we assume that A has successfully send his certificate in DER or PEM format to B? Any help is much appreciated. Best Regards, Rob

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