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• Testing harness for online teaching?

  - by candeira

  I have been asked to teach an online programming course, and I am looking for a test harness especially geared to education. Some students will have significant coding experience, but others will be total newbies. The course is an introduction to software development, mostly taught in C with some C++ and Java thrown in. In any case, I would like to read their source code only after a test suite has made sure that it compiles and executes properly. The students will also benefit from having a tool they can check their code against before submitting it. However, the Learning Management System my employer is using doesn't have such a system. Do you know of any LMS software that includes this feature? Which testing harness would you recommend in case I have to roll my own?

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• How do You Get a Specific Value From a System.Data.DataTable Object?

  - by Giffyguy

  I'm a low-level algorithm programmer, and databases are not really my thing - so this'll be a n00b question if ever there was one. I'm running a simple SELECT query through our development team's DAO. The DAO returns a System.Data.DataTable object containing the results of the query. This is all working fine so far. The problem I have run into now: I need to pull a value out of one of the fields of the first row in the resulting DataTable - and I have no idea where to even start. Microsoft is so confusing about this! Arrrg! Any advice would be appreciated. I'm not providing any code samples, because I believe that context is unnecessary here. I'm assuming that all DataTable objects work the same way, no matter how you run your queries - and therefore any additional information would just make this more confusing for everyone.

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• Running a GWT application inside an IFRAME from an ASP.NET 3.5 app?

  - by Jay Stevens

  We are looking at integrating a full-blown GWT (Google Web Toolkit 2.0) application with an existing ASP.NET 3.5 application. My first gut reaction is that this is a horrible frankenstein idea. However, the customer has insisted that we use this application developed by a third-party. I have almost NO CONTROL over the development of the GWT app. My first thought is to actually attempt to embed this in an iFrame. Because GWT is running under Tomcat/Jakarta, it is hosted on a different server from the .NET app so the iFrame src will be to a URL on the other machine. I need to utilize our own ASP.NET authorization scheme to restrict access to the embedded GWT application. The GWT app also uses embedded java applets, which don't seem to be working right now inside the iframe. Any major problems with this approach that anyone can see? Will GWT work on an iframe while hosted on a different machine?

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• Emacs key binding in Eclipse IDE

  - by Peter Delaney

  Hello; I am an Emacs lover probably because I love the key binding and I am able to do things very quickly. I also use Eclipse IDE for my Java/Android/Python/ development because it is free, most of my peers use it, and it works. I find myself switching between emacs and Eclipse and the workflow just isn't great. What I would like to do is setup the key bindings in Eclipse so that they are like Emacs. Can someone suggest the best Eclipse plugin I could use for this. Or can anyone talk about how they've used Eclipse to be more Emacs like. Thanks in advance

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• Why a very good PHP framework - Qcodo (or Qcubed - its branch) - is so unpopular?

  - by Pawel

  I am wondering why this framework (QCodo) is almost forgotten and totally unpopular. I've started using it a few years ago and it is the only thing that keeps me with PHP. Yeah ... its development is stuck (that's why there is now more active branch Qcubed) but it is still very good piece of software. Its main advantages: Event driven (something like asp.net) no spaghetti code Powerful code generation good ORM follows DRY very simple AJAX support is fun to write Since then I wanted to be trendy and checked Django but I cannot write normal request-based web application (it just doesn't feel right). Don't believe? chess.com is written with it and surely there are plenty others. My 2 questions are: Have you heard of it (PHP people)? If you are using it what is your opinion about it (show us examples of your work) Thanks

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• Asp.Net 1 -> Asp.Net 2 upgrade - Machine.Config - unrecognized parameter

  - by Chris

  Hi All, I am working on upgrading a web app to asp.net 2 from 1. VS 2008 did its conversion things, and everything is building successfully and has been converted to a web application via the appropriate menu item in VS 2008. On launching the site using the Asp.net development server I am receiving a configuration error on the appsettings line in the machine config of Unrecognized attribute 'restartOnExternalChanges'. The app targets asp.net 2 in the projects properties in VS, and the error page indicates similar : Version Information: Microsoft .NET Framework Version:2.0.50727.3053; ASP.NET Version:2.0.50727.3053 The error message seems to indicate I am trying to run this in an asp.net 1 environment, but surely that isnt the case, and if so how do I rectify this. Any help would be appreciated Thanks,

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• iTunes Visualization -- What type of code is it written in and what does that code look like?

  - by Christopher Altman

  Being a web developer, I know how event driven user interfaces are written, but do not have insight into other families of code (embedded software like automotive software, automation software on assembly lines, drivers, or the crawling lower-thirds on CNN, etc.) I was looking at the iTunes visualizer (example) and am curious: What code is used to write the visualizer? Objective C? Does it use Core Animation? What type of abstraction does that library offer? What does the code look like? Is it a list of mathematical equations for producing the crazy graphics? Is it a list of key frames with tweening? Is there an array of images, fractals, worm holes, flowers, sparkles, and some magic mixes them together. Or something totally different? I am not looking for a tutorial, just an understanding of how something very different than web development works. Oh yah, I know iTunes is closed source, so all of this is conjecture.

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• Error With Foundation.h

  - by Nathan Campos

  Hello, I learning Objective-C in Linux(Ubuntu), but when i tryed to compile my application that needs the Foundation headers i got an error saying that the file cannot be found, but i have installed the GNUstep development package(gnustep-devel). Here is my code: // Fraction.h #import <Foundation/NSObject.h> @interface Fraction: NSObject { int numerator; int denominator; } - (void) print; - (void) setNumerator: (int) n; - (void) setDenominator: (int) d; - (void) numerator; - (void) denominator; @end And here is the console log: ubuntu@eeepc:~$ gcc main.m -o frac -lobjc In file included from main.m:3: Fraction.h:2:26: error: objc/NSObject.h: No such file or directory In file included from main.m:3: Fraction.h:4: error: cannot find interface declaration for ‘NSObject’, superclass of ‘Fraction’ ubuntu@eeepc:~$ What i need to do?

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• Rspec-rails doesn't seem to find my models

  - by sa125

  Hi - I'm trying out rspec, and immediately hit a wall when it doesn't seem to load db records I know exist. Here's my fairly simple spec (no tests yet). require File.expand_path(File.dirname(__FILE__) + '../spec_helper') describe SomeModel do before :each do @user1 = User.find(1) @user2 = User.find(2) end it "should do something fancy" end I get an ActiveRecord::RecordNotFound exception, saying it couldn't find User w/ ID=1 or ID=2, which I know for a fact exist. I set both test and development databases to point to the same schema in database.yml, so this shouldn't be database mixup. I also ran script/generate rspec after installing the gems (rspec, rspec-rails), and gem.config both environment.rb and test.rb. Any idea what I'm missing? thanks. EDIT Seems I was running the tests with rake spec:models, which emptied the db and thus no records were found. When I used % spec spec/models/some_model_spec.rb, everything worked as expected.

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• Connect rails application to MsSQL 2005 from Windows

  - by Enrico Carlesso

  Hi guys. I (sadly) have to deploy a rails application on Windows XP which has to connect to Microsoft SQL Server 2005. Surfing in the web there are a lot of hits for connect from Linux to MsSQL, but cannot find out how to do it from Windows. Basically I followed these steps: Install dbi gem Install activerecord-sql-server-adapter gem My database.yml now looks like this: development: adapter: sqlserver mode: odbc dsn: test_dj host: HOSTNAME\SQLEXPRESS database: test_dj username: guest password: guest But I'm unable to connect it. When I run rake db:migrate I get IM002 (0) [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified I'm not a Windows user, so cannot understand really well the meaning of dsn element or so. Does someone have an idea how to solve this? Thanks in advance

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• Conditional configuration in maven pom.xml

  - by David Zhao

  I'd like to ONLY exclude certain files in maven-war-plugin when property "skipCompress" set to true, I thought I could do something like this, but it doesn't work for me. BTW, I can't use profile to achieve this even I want to use skipCompress to turn on and off the compression in both development and deployment profiles. <plugin> <artifactId>maven-war-plugin</artifactId> <configuration> <if> <not> <equals arg1="${skipCompress}" arg2 = "true"/> </not> <then> <warSourceExcludes>**/external/dojo/**/*.js</warSourceExcludes> </then> </if> </configuration> </plugin> Thanks, David

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• Invoking active_record error - can not load file in Ruby on Rails

  - by user1623624

  When I try to run rails generate scaffold test the following error always shows C:\Lab\railapps\dbtest>rails generate scaffold test invoke active_record C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activesupport-3.2.1/lib/active_support/dependencies.rb:251:in `require': Please install the oracle_enhanced_adapter: `gem install activerecord-oracle_enhanced-adapter` (cannot load such file -- active_record/connection_adapters/oracle_enhanced_adapter) (LoadError) from C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activesupport-3.2.1/lib/active_support/dependencies.rb:251:in `block in require'" I did install gem oci8 then activerecord-oracle-enhanced-adapter. Can you help me by having a look? Thanks a lot. Version information C:\Lab\railapps\dbtest>gem list ruby-oci8 *** LOCAL GEMS *** ruby-oci8 (2.1.2 ruby x86-mingw32, 2.0.6) C:\Lab\railapps\dbtestgem list activerecord-oracle_enhanced-adapter *** LOCAL GEMS *** activerecord-oracle_enhanced-adapter (1.4.1) database.yml under configure development: adapter: oracle_enhanced database: cvrman.cablevision.com username: ruby password: ruby

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• iPhone dev question: "No provisioned iPhone OS is connected" error, I don't know what else to try fo

  - by dsobol

  Howdy, I am trying to compile and install my first application onto my iPhone after setting up a profile and certificate. At this point I am getting the "No provisioned iPhone OS is connected" error when I Build & Go. I am using iPhone OS 3.1.3, and Xcode 3.2.2 on 10.6.3. • I have verified that my iPhone is connected to my development machine (it is seen on the computer by both iTunes and Xcode Organizer (in Organizer, it has the green dot next to it)). • I have rebooted the iPhone and restarted Xcode multiple times. • I have verified that the Bundle Identifier in my appname.plist is set to com.. (with the appropriate values between the angle brackets). I have looked the error message up on the web, and so far have not found a hint that has gotten me over the hump.... Thanks for any and all assistance! Regards, Steve O'Sullivan

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• Scripting.dictionary to c#

  - by naresh

  Facing one problem please help me.... We are product development company and our existing application is in ASP, I am trying to send scripting.dictionary object to c#'s com visible class. I am using the System.Collections.Generic class here is my code ASP: dim dictForm set dictForm=CreateObject("scripting.dictionary") dictForm("First") ="one" dictForm("Second") ="two" SET OBJMSGBOX = Server.CreateObject("DictionarySerializer.DictionarySerializer") call OBJMSGBOX.ConvertDictionary(dictForm) c#: [ComVisible(true)] public class DictionarySerializer : IXmlSerializable { Dictionary dict = new Dictionary(); public void ConvertDictionary(Dictionary dictionary) { this.dict = dictionary; } } I am getting error Invalid procedure call or argument: 'ConvertDictionary' Please tell me where I am going in wrong way.

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• Multilangual Unicode rendering in opengl

  - by sum1stolemyname

  Hi Folks, I have to extend an OpenGL-Rendering System to support international characters (especially Hebrew, Arabic and cyrillic). Development Platform is Windows(XP|Vista|7), Alas using Embercardero Delphi 2010. I currently use wglOutLineFont(...) to build my font's display list and glCallLists(length(m_Text), UNSIGNED_SHORT, PWchar(m_Text) ) to render my strings. While this is feasable for Latin-1 Characters, building the full unicode character set in advanced is pretty time-consuming (about 8.5 minutes on my machine), so i am looking for a more efficient solution. I thought about limiting the range from u+0020 - u+077f (latin, greek, cyrillic, arbaic and hebrew) to include just the glyphs i need, but that would just be a solution for my current needs, and will become insufficent once other encoding is needed. On the upside, i do not have to worry about left-to right or right-to left direction as our application can handle this already. I would expect this to be a well-known problem, so i would like to ask if there is any reference material on this on the web, or if you could share some insight on this?

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• Best practice? iphone: sync data

  - by Andy Jacobs

  So i'm working on a project where there is data visualization. My ultimate goal is that i have a set of data shipped with the download of the iphone app. But i want it connected to a backend, that if the iphone has a connection with the internet. it can sync the changes from the backend. The syncing is no problem or the connection between the backend & the iphone. But what should i use as data storage on my iphone? what is the best way. my data is purely text and doesn't have to be secure. But it's main feature should be updating certain parts of data ( adding and deleting are not so important ) so what is the easiest (read: least time consuming development ) or the best way? sqlite? plist? ..?

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• Which is the best alternative for Java Serialization?

  - by Alotor

  I'm currently working on a project which needs to persist any kind of objects (of which implementation we don't have any control) so these objects could be recovered afterwards. We can't implement a ORM because we can't restrict the users of our library at development time. Our first alternative was to serialize it with the Java default serialization but we had a lot of trouble recovering the objects when the users started to pass different versions of the same object (attributes changed types, names, ...). We have tried with the XMLEncoder class (transforms an object into a XML), but we have found that there is a lack of functionality (doesn't support Enums for example). Finally, we also tried JAXB but this impose our users to annotate their classes. Any good alternative?

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• Moving a C# Program to a different language

  - by waiwai933

  I am currently in charge of the development of the second version of program that was created in Microsoft .NET C#. I'm not doing any actual programming, but I am writing the specification for the programmer. I'd like to take it off the .NET codebase, but since Joel said on his blog never to rewrite code, and he does provide good reasoning, I'm inclined to think carefully. So my question is, (1) Are there any easy ways to transition? (Languages like .NET C#) (2) Would you take it off .NET? (3) If so, what language would you use? The reason I want to take it off of .NET is as far as my understanding of .NET, it has to be installed on the client. I'd prefer not to inconvenience my customers when there's a better way.

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• Links to official style guides

  - by User1

  C++ has several types of styles: MFC, Boost, Google, etc. I would like to examine these styles and determine which one is best for my projects, but I want to read from the official style guidebook. Does anyone have an official guide that they typically use? Here are two that I found. I bet there are more: http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml http://www.boost.org/development/requirements.html Note: This is NOT a discussion about which styleis best..only a call for official style guides that people currently use. Please refrain from bashing other style guides that you don't like. Side question: Is there a good tool that can examine source code and tell if it matches a given style guide?

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• Whats the significance of named scope in rails?

  - by piemesons

  Before going for details. Question 1:-- Whats the meaning of scope here (ie named scope)? whats the benefits of using named scope? Now:- from agile development with rails book:-- class Order < ActiveRecord::Base named_scope :last_n_days, lambda { |days| {:conditions => ['updated < ?' , days] } } named_scope :checks, :conditions => {:pay_type => :check} end Such a named scope would make finding the last weeks worth of orders a snap. orders = Orders.last_n_days(7) Scopes can also be combined orders = Orders.checks.last_n_days(7) why we are using named_scope here. We can do the same using methods. Whats special thing we got using named_scope.

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• jQuery - Iframe validation - cannot get values

  - by Henry

  See demo: http://tinyurl.com/3xow97t The editor is under development. Now we check if it has an value - this works well with all form fields that have the class .required... but it does not work with the iframe. the iframe has a div with id #content. $('form .meet').focus(function() { $('iframe').each(function() { ** if($(this).contents().find('#content').val() == '') { ** $(this).addClass('warning'); } }) }); That means it should add the class .warning if the iframe is empty. But it always does, so what am i doing wrong? Does it not work, because the JS does not see the text i currently typed in? ^^ Regards Henry

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• "Filtering" Cells in a UITableView. Multiple Views? Subviews?

  - by Bryan Veloso

  (First question related to iPhone development, so apologies for sounding off-track.) I'm creating a view that has a few things; a UITabBarController controlling 3 UITableViews. Two of these TableViews are filtered versions of the 3rd. All of them will be making a JSON call (still working on that) to retrieve a list of objects. So, because these views are related in some way, would there be a more "sane" way to display this data? With say, subviews? Or would I have to just create 1 view for each that returns the desired data and be done with it? If it helps at all, I have full control over the API I'm talking with, so changes to that that help with this don't really matter to me too much. Thanks in advance!

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• What's the best way to do literate programming in Python on Windows?

  - by JasonFruit

  I've been playing with various ways of doing literate programming in Python. I like noweb, but I have two main problems with it: first, it is hard to build on Windows, where I spend about half my development time; and second, it requires me to indent each chunk of code as it will be in the final program --- which I don't necessarily know when I write it. I don't want to use Leo, because I'm very attached to Emacs. Is there a good literate programming tool that: Runs on Windows Allows me to set the indentation of the chunks when they're used, not when they're written Still lets me work in Emacs Thanks! Correction: noweb does allow me to indent later --- I misread the paper I found on it. By default, notangle preserves whitespace and maintains indentation when expanding chunks. It can therefore be used with languages like Miranda and Haskell, in which indentation is significant That leaves me with only the "Runs on Windows" problem.

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• Unable to allocate new pages in table space "XXXX" ... but it's 250 megs and I'm only running DDL

  - by Sylvia

  Hello, I'm a DB2 newbie, so I'd appreciate even any pointers on where to start looking. We have great DB2 admins but they're swamped with other issues now, so I'm trying to do some troubleshooting on a development database. My situation is that I have a tablespace that's giving me this error message Unable to allocate new pages in table space "[MyTableSpace]". However, all I'm doing is running multiple (hundreds) of DDL statements, mainly creating tables but also indexes and pk scripts. So, considering that the tablespace has about 250 mg, I shouldn't be running out of space, right? Here's another thing - it appears that after I leave my script for a while, something "resets" and works for a while, then I begin to have the tablespace issue again. thanks, Sylvia

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• Frustrated with Objective-c code...

  - by Moshe

  Well, I've started with iPod/iPhone programming using Head First iPhone Development (O'reilly) and I'm typing code out of the book. There are two problems, one is programming related and the other is not. I don't understand the format of objective-c methods. I'm getting an few errors now, based on source code from the book. Which leads me to my next issue. Some of the code is buggy. I think so because I couldn't get the code to run without modifying it. The book has some typos in the text since it's a first edition and whatnot, but could my "fixing" the code have to do with it? So... Where can I learn more about objective-c methods and how they work in terms of structure and where the return type and arguments go? For those with the book, I'm in the middle of the InstaTweet app towards the beginning. Thanks.

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