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• MVC 4 and the App_Start folder

  - by pjohnson

  I've been delving into ASP.NET MVC 4 a little since its release last month. One thing I was chomping at the bit to explore was its bundling and minification functionality, for which I'd previously used Cassette, and been fairly happy with it. MVC 4's functionality seems very similar to Cassette's; the latter's CassetteConfiguration class matches the former's BundleConfig class, specified in a new directory called App_Start.At first glance, this seems like another special ASP.NET folder, like App_Data, App_GlobalResources, App_LocalResources, and App_Browsers. But Visual Studio 2010's lack of knowledge about it (no Solution Explorer option to add the folder, nor a fancy icon for it) made me suspicious. I found the MVC 4 project template has five classes there--AuthConfig, BundleConfig, FilterConfig, RouteConfig, and WebApiConfig. Each of these is called explicitly in Global.asax's Application_Start method. Why create separate classes, each with a single static method? Maybe they anticipate a lot more code being added there for large applications, but for small ones, it seems like overkill. (And they seem hastily implemented--some declared as static and some not, in the base namespace instead of an App_Start/AppStart one.) Even for a large application I work on with a substantial amount of code in Global.asax.cs, a RouteConfig might be warranted, but the other classes would remain tiny.More importantly, it appears App_Start has no special magic like the other folders--it's just convention. I found it first described in the MVC 3 timeframe by Microsoft architect David Ebbo, for the benefit of NuGet and WebActivator; apparently some packages will add their own classes to that directory as well. One of the first appears to be Ninject, as most mentions of that folder mention it, and there's not much information elsewhere about this new folder.

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• Pygame surfaces and their Rects

  - by Jaka Novak

  I am trying to understand how pygame surfaces work. I am confused about Rect position of Surface object. If I try blit surface on screen at some position then Surface is drawn at right position, but Rect of the surface is still at position (0, 0)... I tried write my own surface class with new rect, but i am not sure if is that right solution. My goal is that i could move surface like image with rect.move() or something like that. If there is any solution to do that i would be happy to read it. Thanks for answer and time for reading this awful English If helps i write some code for better understanding my problem. (run it first, and then uncomment two lines of code and run again to see the diference): import pygame from pygame.locals import * class SurfaceR(pygame.Surface): def __init__(self, size, position): pygame.Surface.__init__(self, size) self.rect = pygame.Rect(position, size) self.position = position self.size = size def get_rect(self): return self.rect def main(): pygame.init() screen = pygame.display.set_mode((640, 480)) pygame.display.set_caption("Screen!?") clock = pygame.time.Clock() fps = 30 white = (255, 255, 255) red = (255, 0, 0) green = (0, 255, 0) blue = (0, 0, 255) surface = pygame.Surface((70,200)) surface.fill(red) surface_re = SurfaceR((300, 50), (100, 300)) surface_re.fill(blue) while True: for event in pygame.event.get(): if event.type == QUIT: return 0 screen.blit(surface, (100,50)) screen.blit(surface_re, surface_re.position) #pygame.draw.rect(screen, white, surface.get_rect()) #pygame.draw.rect(screen, white, surface_re.get_rect()) pygame.display.update() clock.tick(fps) if __name__ == "__main__": main()

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• How do I prevent skype from starting another instance when it's already running?

  - by con-f-use

  Just a little unnecessary annoyance to fix here: Suppose you have Skype for Ubuntu running. You accidentally click on the launcher again. The way it is now, Skype starts a second instance, which promptly tells you it can't log in. There is another instance already running. To make things worse: On the next regular start of Skype it you will have to re-enter your saved password, due to the "Sign in failure". I thought this would be fixed soon but neither Canonical nor Microsoft care enough. The annoyance continues to exist for the last three updates at least. So in an approach to provide a workaround I will post what I've done to prevent this behaviour. Maybe it's useful for some of you. Maybe it will rise awareness and cause a fix. I'm happy for any better solution btw. and that's the real purpose of my question. Usually I don't answer them myself. So doesn anyone know of a better solution to fix dual instancing of Skype?

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• How to work around a possible XNA Game Studio or Windows Phone SDK install failure on Windows 8

  - by Laurent Bugnion

  I am not sure if you guys know Aaron Stebner. Aaron works at Microsoft, and has pulled thorns from my side many many times already. His blog is at http://blogs.msdn.com/b/astebner and it is a gold mine of tips and tricks to debug and solve many cryptic issues happening during installation and removal of programs. For example, Aaron taught me how to remove programs that do not appear in the Programs and Features list, amongst many other things. The last nugget I used from Aaron’s blog saved my butt just before a presentation where I had to run both Visual Studio 10 with the Windows Phone SDK, and Visual Studio 11 for WinRT development. Of course this had to be on Windows 8. Unfortunately when you install the Windows Phone SDK on Windows 8, you may (or may not, I saw both scenarios) encounter an issue with XNA, and the installation fails. Unfortunately, even if you don’t use XNA in your apps, this will prevent even normal Windows Phone app development. Fortunately, Aaron has a fix for that. I hope that this helps spread the word, and increase Aaron’s blog’s visibility! Happy coding, Laurent   Laurent Bugnion (GalaSoft) Subscribe | Twitter | Facebook | Flickr | LinkedIn

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• unit level testing, agile, and refactoring

  - by dsollen

  I'm working on a very agile development system, a small number of people with my doing the vast majority of progaming myself. I've gotten to the testing phase and find myself writing mostly functional level testing, which I should in theory be leavning for our tester (in practice I don't entirely...trust our tester to detect and identify defects enough to leave him the sole writter of functional tests). In theory what I should be writing is Unit level tests. However, I'm not sure it's worth the expense. Unit testing takes some time to do, more then functional testing since I have to set up mocks and plugs into smaller units that weren't design to run in issolation. More importantly, I find I refactor and redesign heavily-part of this is due to my inherriting code that needed heavy redesign and is still being cleaned up, but even once I've finished removing parts that need work I'm sure in the act of expanding the code I'll still do a decent amount of refactoring and redesign. It feels as if I will break my unit tests, forcing wasted time to refactor them as well, often due to unit test, by definition, having to be coupled so closely to the code structure. So.is it worth all the wasted time when functional tests, that will never break when I refactor/redesign, should find most defects? Do unit tests really provide that much extra defect detetection over through functional? and how does one create good unit tests that work with very quick and agile code that is modified rapidly? ps, I would be fine/happy with links to anything one considers an excellent resource for how to 'do' unit testing in a highly changing enviroment. edit: to clarify I am doing a bit of very unoffical TDD, I just seem to be writing tests on what would be considered a functional level rather then unit level. I think part of this is becaus I own nearly all of the project I don't feel I need to limit the scope as much; and part of it is that it's daunting to think of trying to go back and retroactively add the unit tests needed to cover enough code that I can feel comfortable testing only a unit without the full functionality and trust that unit still works with the rest of the units.

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• How can we make agile enjoyable for developers that like to personally, independently own large chunks from start to finish

  - by Kris

  We’re roughly midway through our transition from waterfall to agile using scrum; we’ve changed from large teams in technology/discipline silos to smaller cross-functional teams. As expected, the change to agile doesn’t suit everyone. There are a handful of developers that are having a difficult time adjusting to agile. I really want to keep them engaged and challenged, and ultimately enjoying coming to work each day. These are smart, happy, motivated people that I respect on both a personal and a professional level. The basic issue is this: Some developers are primarily motivated by the joy of taking a piece of difficult work, thinking through a design, thinking through potential issues, then solving the problem piece by piece, with only minimal interaction with others, over an extended period of time. They generally complete work to a high level of quality and in a timely way; their work is maintainable and fits with the overall architecture. Transitioning to a cross-functional team that values interaction and shared responsibility for work, and delivery of working functionality within shorter intervals, the teams evolve such that the entire team knocks that difficult problem over. Many people find this to be a positive change; someone that loves to take a problem and own it independently from start to finish loses the opportunity for work like that. This is not an issue with people being open to change. Certainly we’ve seen a few people that don’t like change, but in the cases I’m concerned about, the individuals are good performers, genuinely open to change, they make an effort, they see how the rest of the team is changing and they want to fit in. It’s not a case of someone being difficult or obstructionist, or wanting to hoard the juiciest work. They just don’t find joy in work like they used to. I’m sure we can’t be the only place that hasn’t bumped up on this. How have others approached this? If you’re a developer that is motivated by personally owning a big chunk of work from end to end, and you’ve adjusted to a different way of working, what did it for you?

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• Friday Spotlight: Network Troubleshooting with Oracle Linux

  - by Chris Kawalek

  Happy Friday, everyone! Our Spotlight this week is on a fantastic new article by Oracle's Robert Chase and posted on Oracle Technology Network. The article steps through, with command line examples, several strategies for tracking down network connectivity issues. From the article: "When applications that use network connectivity for communication are not working, the cause is often a mystery. Despite advances in modern operating systems, many users believe there is no way to directly "see" what's going over the wire, and that often leads to confusion and difficulties when something goes wrong. The reality is that you can actually see what's going over the wire, and there are a number of tools built into Oracle Linux for troubleshooting network issues. This article will help solve some of the mystery and make network connectivity a bit more user friendly." I highly recommend checking this article out, it's a good one! Network Troubleshooting with Oracle Linux  We'll see you next week! -Chris 

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• pdflatex reads .eps files saved in OS/X, but not in Ubuntu

  - by David B Borenstein

  Sorry if this is a stupid question; I'm a newbie. I am preparing a manuscript in LaTeX. The journal (Physical Biology, an IOP publication) requires that figures be saved in .eps format, so I am trying to do that. However, I cannot get my LaTeX file to build when I have generated the .eps files on my Ubuntu computer. If I save the images on my Mac, the file build just fine. So far, I have tried saving images in ImageJ, FIJI and Inkscape. The same problem occurs in all three. When using kile, I get the following error: /usr/share/texmf-texlive/tex/latex/oberdiek/epstopdf-base.sty:0: Shell escape feature is not enabled. In TexWorks, the error is different, but still there: Package pdftex.def Error: File `./figures4/figure4a-eps-converted-to.pdf' not found. Now, if I fire up Inkscape, FIJI or ImageJ on OS/X, everything works fine. The Mac also can't build with the Ubuntu-saved images. The images generated on the Ubuntu machine open fine using Document Viewer. I am building the same LaTeX file on both computers, with the exact same results. The header of my LaTeX file is: \documentclass[12pt]{iopart} \usepackage{graphicx} \usepackage{epstopdf} \usepackage{parskip} \usepackage{color} \usepackage{iopams} And then the code for the figure is: \begin{figure} \center{\includegraphics[width=4in] {./figures4/figure4a.eps}} \footnotesize{\caption{ \label{fig:4a} (4a) lorem ipsum dolor sic amet.}} \end{figure} I'd be happy to send an example of both .eps files. Again, sorry if this is a dumb question. I tried everything I could think of before posting here. Thanks, David

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• What You Said: How You Track Your Time

  - by Jason Fitzpatrick

  Earlier this week we asked you to share your favorite time tracking tips, tricks, and tools. Now we’re back to highlight the techniques HTG readers use to keep tabs on their time. While more than one of you expressed confusion over the idea of tracking how you spend all your time, many of you were more than happy to share the reasons for and the methods you use to stay on top of your time expenditures. Scott uses a fluid and flexible project management tool: I use kanbanflow.com, with two boards to manage task prioritisation and backlog. One board called ‘Current Work’ has three columns ‘Do Today’, ‘In Progress’ and ‘Done’. The other is called ‘Backlog’, which splits tasks into priority groups – ‘Distractions (NU+NI)’, ‘Goals (NU+I)’, ‘Interruptions (U+NI)’, ‘Interruptions (U+NI)’ and ‘Critical (U+I)’, where U is Urgent and I is Important (and N is Not). At the end of each day, I move things from my Backlog to my ‘Current Work’ board, with the idea to keep complete Goals before they become Critical. That way I can focus on ‘Current Work’ Do Today so I don’t feel overwhelmed and can plan my day. As priorities change or interruptions pop up, it’s just a matter of moving tasks between boards. I have both tabs open in my browser all day – this is probably good for knowledge workers strapped to their desk, not so good for those in meetings all day. In that case, go with the calendar on your phone. While the above description might make it sound really technical, we took the cloud-based app for a spin and found the interface to be very flexible and easy to use. Can Dust Actually Damage My Computer? What To Do If You Get a Virus on Your Computer Why Enabling “Do Not Track” Doesn’t Stop You From Being Tracked

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• Sun2Oracle: Upgrading from DSEE to the next generation Oracle Unified Directory - webcast follow up

  - by Darin Pendergraft

  Thanks to all of the guest speakers on our Sun2Oracle webcast: Steve from Hub City Media, Albert from UCLA and our own Scott Bonell. During the webcast, we tried to answer as many questions as we could, but there were a few that we needed a bit more time to answer.  Albert from UCLA sent me the following information: Alternate Directory EvaluationWe were happy with Sun DSEE. OUD, based on the research we had done, was a logical continuation of DSEE.  If we moved away, it was to to go open source. UCLA evaluated OpenLDAP, OpenDS, Red Hat's 389 Directory. We also briefly entertained Active Directory. Ultimately, we decided to stay with OUD for the Enterprise Directory, and adopt OpenLDAP for the non-critical edge directories.HardwareFor Enterprise Directory, UCLA runs 3 Dell PowerEdge R710 servers. Each server has 12GB RAM and 2 2.4GHz Intel Xeon E5 645 processors. We run 2 of those servers at UCLA's Data Center in a semi active-passive configuration. The 3rd server is located at UCLA Berkeley. All three are multi master replicated. At run time, the bulk of LDAP query requests go to 1 server. Essentially, all of our authn/authz traffic is being handled by 1 server, with the other 2 acting as redundant back ups.

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• How to Reach German Developers: dotnet Cologne 2011

  - by WeigeltRo

  If you want to promote tools, technologies, libraries, trainings or anything else of interest to software developers, you want to reach the right audience. Not the 9-to-5 people, but those who have the knowledge and passion that make them important multipliers. A great way to reach these people are community conferences. They are not the kind of conference that the 9-to-5 folks are “sent to” by their company, but that the right people hear of via Twitter, Facebook, blogs or plain old word-of-mouth and choose to go to, often covering the costs for the day themselves (travel, entrance fee, hotel, taking the day off). If you want to reach German developers there is one conference that has emerged as the large .NET community conference in Germany, quickly growing beyond being just a local event: The dotnet Cologne, that will be held for the third time on May 6, 2011 and that I’m co-organizing (this interview gives you a good idea of the history). This year’s dotnet Cologne 2010 with its 300 attendees was a huge success. As in the year before, the conference was sold out weeks in advance, and feedback by attendees and sponsors was positive throughout. And the list of speakers and attendees sounded like a “who is who” of the German .NET community. Whether you‘d like to present a product, a service or your company: you will meet the right target audience at dotnet Cologne. We’re offering a broad variety of sponsorship opportunities, ranging from being a donor for the large raffle at the end of the day (software licenses, books, training vouchers, etc.) up to having a booth and/or giving a sponsored talk about your product (not necessarily in German, English is not a problem). Among the various sponsorship levels (bronze/silver/gold/platinum) there’s most likely a package that will suit your needs – and if not, we’re open for suggestions. We’re happy to announce that already at this point in time (with over five months to go) we have a steadily growing list of partners: Microsoft, Intel, IDesign, SubMain, Comma Soft AG, GFU Köln, and EC Software. If you want to become a sponsor for the dotnet Cologne 2011, drop me a line at Roland.Weigelt at dotnet-koelnbonn.de and I’ll send you our sponsor info.

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• Central Ohio Day of .Net 2010 Slides and Files

  - by Brian Jackett

  This weekend I presented my “The Power of PowerShell + SharePoint 2007” session at the Central Ohio Day of .Net conference in Wilmington, OH this weekend.  This is the second year I’ve attended this conference, first time as a presenter.  For those unfamiliar Day of .Net conferences are a one-day conference on all things .NET organized by developers for developers.  These events are usually offered at no cost to anyone interested in .NET development.     The attendees of my session had some great questions and I hope they all got something worthwhile out of it.  Below are my slides and demo scripts (some of which I didn’t have time to demo) along with my sample profiles.  If you have any questions, comments, or feedback feel free to leave comments here or send me an email at [email protected].   Slides and Files SkyDrive link   Technology and Friends Interview Experience     On a side note, any of you familiar with one of my Sogeti co-workers in Detroit David Giard may know that he hosts a web series called Technology and Friends.  After my session David tracked me down and asked to interview me about PowerShell.  I was happy to oblige so we sat down and taped some material.  I don’t know when that interview will be going live, but look for it on www.davidgiard.com.   Conclusion     A big thanks goes out to all of the sponsors, speakers, and attendees for the Central Ohio Day of .Net conference.  Without all of them this conference couldn’t have been possible.  I had a great time at the conference and look forward to coming back next year whether that is as a speaker or attendee.       -Frog Out

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• 24 Hours of PASS scheduling

  - by Rob Farley

  I have a new appreciation for Tom LaRock (@sqlrockstar), who is doing a tremendous job leading the organising committee for the 24 Hours of PASS event (Twitter: #24hop). We’ve just been going through the list of speakers and their preferences for time slots, and hopefully we’ve kept everyone fairly happy. All the submitted sessions (59 of them) were put up for a vote, and over a thousand of you picking your favourites. The top 28 sessions as voted were all included (24 sessions plus 4 reserves), and duplicates (when a single presenter had two sessions in the top 28) were swapped out for others. For example, both sessions submitted by Cindy Gross were in the top 28. These swaps were chosen by the committee to get a good balance of topics. Amazingly, some big names missed out, and even the top ten included some surprises. T-SQL, Indexes and Reporting featured well in the top ten, and in the end, the mix between BI, Dev and DBA ended up quite nicely too. The ten most voted-for sessions were (in order): Jennifer McCown - T-SQL Code Sins: The Worst Things We Do to Code and Why Michelle Ufford - Index Internals for Mere Mortals Audrey Hammonds - T-SQL Awesomeness: 3 Ways to Write Cool SQL Cindy Gross - SQL Server Performance Tools Jes Borland - Reporting Services 201: the Next Level Isabel de la Barra - SQL Server Performance Karen Lopez - Five Physical Database Design Blunders and How to Avoid Them Julie Smith - Cool Tricks to Pull From Your SSIS Hat Kim Tessereau - Indexes and Execution Plans Jen Stirrup - Dashboards Design and Practice using SSRS I think you’ll all agree this is shaping up to be an excellent event.

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• Oracle SQL Developer: Fetching SQL Statement Result Sets

  - by thatjeffsmith

  Running queries, browsing tables – you are often faced with many thousands, if not millions, of rows. Most people are happy with looking at the first few rows. But occasionally you need to see more. SQL Developer doesn’t show you all records, all at once. Instead, it brings the records down in ‘chunks,’ or as-needed. How It Works There is a preference that tells SQL Developer how many records to get in a single request, or ‘fetch’ of records. The default is 50… So if I run a query that returns MORE than 50 rows: There’s more than 50 records in this resultset, but we have 50 in the grid to start with. We don’t know how many records are in this result set actually. To show the record count here, we actually go physically query the database with a row count type query. All we know is that the query has finished executing, and that there are rows available to go fetch. It tells us when it’s done. As you scroll through the grid, if you get to record 50 and scroll more, we’ll get 50 more records. Or, you can cheat to get to the ‘bottom’ of the result set. You can ask SQL Developer to just to get all the records at once… Once all the records have been fetched, you’ll see this: All rows fetched! A word of caution There’s a reason we have the default set to 50 and not 1000. Bringing back data can get expensive and heavy. We’ve found the best performance to be found in that 50 to 200 record range.

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• Speaker at the German Visual FoxPro Developer Conference 2005

  The following is an excerpt from the UniversalThread conference coverage of the German Visual FoxPro Developer Conference 2005 written by Armin Neudert and Jan Vit. Unfortunately, my sessions were not covered at all but I was there as a speaker after all: [...] We are happy to welcome back several speakers that have already been giving sessions in previous DevCons, but hadn’t been here for one or more years. In detail: Steven Black is back after several years. Marcia Akins and her husband Andy Kramek couldn’t come in 2004 and are back again now. Regarding German speakers, Andreas Flohr and Torsten Weggen are also here again, after not doing sessions for two, respectively four years at this conference. At this point we would like to send some regards to the speakers that couldn’t come to Frankfurt this year, since they are very busy at the moment or are doing sessions anywhere else in the world right now. We are also proud to announce several speakers that are here for the very first time. Welcome to Doug Hennig, Rick Schumer, Craig Berntson, Marcus Luz and Benjamin Anders. And of course, there all the well known speakers which did great sessions over the last years: Sebastian Flucke, Uwe Habermann, Peter Herzog, Venelina Jordanova, Dan Jurden, Jochen Kirstätter, Nathalie Mengel, Lisa Slater Nichols, Michael Niethammer, Rick Strahl, Markus Winhard, Eugen Wirsing, Christof Wollenhaupt and myself - Armin Neudert :-) [...]

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• Sponsor the Hottest .NET Community Event in Germany: dotnet Cologne 2011

  - by WeigeltRo

  The “dotnet Cologne” conference organized by the NET usergroups Bonn and Cologne quickly has become the .NET community event in Germany. So when we opened the registration for dotnet Cologne 2011 on Monday, we expected some interest. But we didn’t expect the 200 “early bird” seats to be gone in less than three hours! And the registrations at normal price keep coming in, so it looks like this event will sell out even earlier than last year. In December I wrote about sponsorship opportunities at the dotnet Cologne 2011 – and why it’s a good idea to be a sponsor at this particular conference. If you are interested in becoming a sponsor: We still offer a wide variety of sponsorship packages in different sizes. At our new, larger, event location, we still have space for exhibition booths. Last year’s exhibitors were very happy and had many interesting conversations with the attendees. And this year we planned for longer breaks between sessions, which means event more time for presenting your products. And yes, German developers understand English demos. But maybe a booth is a bit too much for you. With the Bronze package, you can make sure the attendees receive promotional material of your company in their bags – for a fraction of what you’d pay at a commercial conference. Or you could sponsor a couple of licenses of your product for the raffle at the end of the day. If you want to learn more, just send an email to Roland.Weigelt at dotnet-koelnbonn.de and I’ll send you our sponsor information.

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• Learning to code first game, few questions on basic game development and 3D

  - by ProgrammerByDay

  I've been programming for a while, and I'm concurrently learning how to make a basic game and slimdx, and wanted to talk to someone to hopefully get a few pointers. I've read that Tetris is the "Hello, world" of game programming, which made sense to me, so I decided to give it a shot. I've been able to code up a basic version in a few hours, which I'm quite happy with, but I had a few questions about 3D programming. Right now I'm using Direct3D to do display the blocks without any textures (just colored squares). I have a data structure (2d array of bytes, where each byte denotes the presence of a block and its color) which is the "game board," and on every render() call I create a new vertex buffer of the existing squares in the game board, and draw those primitives. This feels very inefficient, and I wondering what would be the idiomatic way of doing this in a 3D world, with matrix/rotations/translation operations. I know 3D is overkill for such a project, but I want to learn any 3d concepts that I can while I'm doing it. I understand that what you'd usually want to do is keep the same vertices/vertex buffers but manipulate them with matrices to achieve rotations/translations, etc. To do so, I assume what would happen is I'd have one vertex buffer for the "active" piece, since that'll be constantly rotated and moved, and have one vertex buffer for the frozen pieces on the bottom of the board, which is pretty much stationary, but will need to be changed/recreated when the active piece becomes frozen. Right now I'm just clearing and redrawing on every render call, which seems like the easiest way to do things, although I wonder if there's a more efficient way to deal with changes. Obviously there are a lot of questions I'm asking here, but if you can even just point me a step or two ahead in terms of how I should be thinking, it'd be great. Thanks

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• Correct level of abstraction for a 3d rendering component?

  - by JohnB

  I've seen lots of questions around this area but not this exact question so apologies if this is a duplicate. I'm making a small 3d game. Well to be honest, it's just a little hobby project and likely won't turn out to be an actual game, I'll be happy to make a nice graphics demo and learn about 3d rendering and c++ design. My intent is to use direct3d9 for rendering as I have some little experience of it, and it seems to meet my requirements. However if I've learned one thing as a programmer it's to ask "is there any conceivable reason that this component might be replaced by a different implmentation" and if the answer is yes then I need to design a proper abstraction and interface to that component. So even though I intend to implment d3d9 I need to design a 3d interface that could be implemented for d3d11, opengl... My question then is what level is it best to do this at? I'm thinking that an interface capable of creating and later drawing Vertex buffers and index buffers Textures Vertex and Pixel "shaders" Some representation of drawing state (blending modes etc...) In other words a fairly low level interface where my code to draw for example an animated model would use the interface to obtain abstract vertex buffers etc. I worry though that it's too low level to abstract out all the functionallity I need efficiently. The alternative is to do this at a higher level where the interface can draw objects, animations, landscapes etc, and implement them for each system. This seems like more work, but it more flexible I guess. So that's my question really, when abstracting out the drawing system, what level of interface works best?

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• Haskell: Best tools to validate textual input?

  - by Ana

  In Haskell, there are a few different options to "parsing text". I know of Alex & Happy, Parsec and Attoparsec. Probably some others. I'd like to put together a library where the user can input pieces of a URL (scheme e.g. HTTP, hostname, username, port, path, query, etc.) I'd like to validate the pieces according to the ABNF specified in RFC 3986. In other words, I'd like to put together a set of functions such as: validateScheme :: String -> Bool validateUsername :: String -> Bool validatePassword :: String -> Bool validateAuthority :: String -> Bool validatePath :: String -> Bool validateQuery :: String -> Bool What is the most appropriate tool to use to write these functions? Alex's regexps is very concise, but it's a tokenizer and doesn't straightforwardly allow you to parse using specific rules, so it's not quite what I'm looking for, but perhaps it can be wrangled into doing this easily. I've written Parsec code that does some of the above, but it looks very different from the original ABNF and unnecessarily long. So, there must be an easier and/or more appropriate way. Recommendations?

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• Want to be part of the most meaningful Customer Experience conversation today?

  - by Tony Berk

  v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Today's entry is written by Chris Warner, Director, Product Strategy at Oracle. By now you’ve undoubtedly seen the blogs and announcements about Oracle OpenWorld. And perhaps you’ve also seen the news about OpenWorld’s newest sister event: Oracle Customer Experience (CX) Summit @ OpenWorld. Oracle CX Summit was created to be the most meaningful CX event, to be truly unique, to serve as the place to discover what it takes and what it really means to put the customer at the center of your business success. One long-time Oracle customer, when told about the Oracle CX Summit, put it this way: ‘This makes me rethink how I think about Oracle and Customer Experience’. Listen to what she heard and you be the judge. We believe Customer Experience (‘CX’) is a movement, not just the latest ‘IT’ tech trend. CX isn’t something you can simply ‘install’. CX is one of the most strategic initiatives an organization can undertake. Customer Experience is about connecting with an organization’s most important asset, the customer, and the critical role that connection has to an organization’s success. And there’s never been a bigger gathering of the smartest CX minds, most successful CX companies, and innovative CX examples than Oracle CX Summit. Take Subaru, for example. The company fully embraced the CX opportunity and their CX leadership will be on stage at the Oracle CX Summit to share their CX journey. They radically changed the way they interact with their customers, empower their employees, and differentiate their brand. And this is a story with a phenomenal happy ending: in a stagnant market and shrinking economy, they GREW their business and outpaced their competition. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} At Oracle CX Summit, you will be surrounded by dozens of CX leaders, visionaries and innovators like Subaru. This three-day event brings together the largest collection of thought leaders and practitioners in Customer Experience ever. Notable presenters include: v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Calibri","sans-serif"; mso-bidi-font-family:"Times New Roman";} Seth Godin - World-renowned blogger and one ‘the World’s Top 21 Speakers’, author of 14 best-selling books like “Permission Marketing”, and founder of dozens of startups such as Squidoo.com (ranked one of the top 125 sites in the US). Kerry Bodine - VP Principal Analyst at Forrester for Customer Experience, author of the just-published book “Outside In - The Power of Putting Customers at the Center of Your Business”, and renowned author of “The Customer Experience Ecosystem”. Bruce Temkin - Co-founder and Chair of the Customer Experience Professionals Association, revered blogger of “Customer Experience Matters”, former VP Principal Analyst at Forrester for Customer Experience, Founder and Managing Partner of The Temkin Group, a leading Customer Experience research and consulting firm. George Kembel - Executive Director and Co-founder of the Stanford Design School, an established, recognized thought leader in design thinking and innovation, and a Silicon Valley based-CEO, venture capitalist and educator. Gene Alvarez - VP Research Analyst at Gartner and a recognized authority in the Retail and Consumer Goods industry. Gene has been published, featured and referenced in a variety of trade publications for Customer Experience insights. Senior Executives from innovative Customer Experience brands and agencies like AT&T, Intuit, Southwest Airlines, Marriott, Quiksilver, and Sapient. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Calibri","sans-serif"; mso-bidi-font-family:"Times New Roman";} But the CX Summit includes much, much more. There are over 30+ role-driven sessions and rountables as well as one-of-a-kind events including: v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Calibri","sans-serif"; mso-bidi-font-family:"Times New Roman";} The Customer Experience Innovation Tent featuring hands-on demonstrations of bleeding-edge customer experiences like the Share Happy Ice Cream Machine A hands-on Customer Journey Mapping Workshop that lets you learn design thinking techniques for innovating differentiated experiences that drive cross-functional alignment Access to the Oracle OpenWorld Exhibition Halls and DEMOgrounds as well as a week-long Live Music Festival and the Oracle Appreciation Event featuring Pearl Jam and Kings of Leon Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Calibri","sans-serif"; mso-bidi-font-family:"Times New Roman";} At Oracle, we are quite proud of our award-winning suite of CX products, a suite of solutions that can help an organization greatly accelerate their CX journey. But Oracle CX Summit isn’t about products. It’s about how an organization can succeed in its CX initiative. There’s never been a bigger gathering of the smartest CX minds, most successful CX companies, and innovative CX examples than Oracle CX Summit. Come join the Customer Experience Revolution. Register for Oracle CX Summit @ OpenWorld here. v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Calibri","sans-serif"; mso-bidi-font-family:"Times New Roman";} --

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• A bounce-rate attack to manipulate SEO ?

  - by Denis Volovik

  This is a question to experienced people that might help us shed some light on the issue. We noticed a very strange behavior on our site, in Google Analytics. Some dude from Finland, namely, from Kouvola city is hitting one of our pages - only one page on our site, 'bout a hundred times per day, all with an average bounce rate of 90%+... This is causing our overall bounce rate to go up by 1 to 3% per day... which is very disturbing.. since we're trying to do our best in order to keep it as low as possible. And obviously having it jumped from ~24% to 27%, just because of that crazy dude is not making us happy at all... We tried implementing a geo-targeted script in order to catch this particular visitor and deliver him a juicy message, and it seemed like it helped in the beginning, it has stopped for a day or two, but now he's back... The geo-targeted script was also logging all IP addresses for page requests originating from Finland in order to find out more details and (in order to block them on the server level, later).. but thing is, it was all mainly cable or DSL connections with various, but not constantly repeating IPs... we are all wondering what is he up to really ? I think that this page should be kept updated with ideas on how to combat this and perhaps someone could also shed light on what it might be ? What is the reason for doing this "bounce-rate attack", as I call it? There was a similar question asked on stackoverflow earlier, with no meaningful answer - here - How to stop bounce rate manipulation.

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• Distinct operator in Linq

  - by Jalpesh P. Vadgama

  Linq operator provides great flexibility and easy way of coding. Let’s again take one more example of distinct operator. As name suggest it will find the distinct elements from IEnumerable. Let’s take an example of array in console application and then we will again print array to see is it working or not. Below is the code for that. In this application I have integer array which contains duplicate elements and then I will apply distinct operator to this and then I will print again result of distinct operators to actually see whether its working or not. using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Experiment { class Program { static void Main(string[] args) { int[] intArray = { 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5 }; var uniqueIntegers = intArray.Distinct(); foreach (var uInteger in uniqueIntegers) { Console.WriteLine(uInteger); } Console.ReadKey(); } } } Below is output as expected.. That’s cool..Stay tuned for more.. Happy programming. Technorati Tags: Linq,Distinct

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• Single Responsibility Principle - How Can I Avoid Code Fragmentation?

  - by Dean Chalk

  I'm working on a team where the team leader is a virulent advocate of SOLID development principles. However, he lacks a lot of experience in getting complex software out of the door. We have a situation where he has applied SRP to what was already quite a complex code base, which has now become very highly fragmented and difficult to understand and debug. We now have a problem not only with code fragmentation, but also encapsulation, as methods within a class that may have been private or protected have been judged to represent a 'reason to change' and have been extracted to public or internal classes and interfaces which is not in keeping with the encapsulation goals of the application. We have some class constructors which take over 20 interface parameters, so our IoC registration and resolution is becoming a monster in its own right. I want to know if there is any 'refactor away from SRP' approach we could use to help fix some of these issues. I have read that it doesn't violate SOLID if I create a number of empty courser-grained classes that 'wrap' a number of closely related classes to provide a single-point of access to the sum of their functionality (i.e. mimicking a less overly SRP'd class implementation). Apart from that, I cannot think of a solution which will allow us to pragmatically continue with our development efforts, while keeping everyone happy. Any suggestions ?

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• Check Out Eye Tracking, Mobile, and Fusion Apps at Apps UX Demo Pods

  - by Oracle OpenWorld Blog Team

  By Kathy Miedema, Oracle Applications User Experience Among the many cool things to see at the Oracle OpenWorld DEMOgrounds this year will be demo pods featuring some of the cutting-edge tools in Oracle’s arsenal of usability evaluation methods.OK, so we’re bragging a little. But past conference goers agree – these demos consistently hit the Top 10 for number of visits. Why? Because you get to try out our eye-tracking tool, which follows where a user looks on a screen and helps the UX team decipher issues with navigation design. Or you can see our facial gesture analysis tool in action, which helps us read the emotions you might be experiencing as you look at a screen – happy, sad, or dismayed, to name a few. Are you interested in Oracle’s strategy for user experience? Come to the Apps UX pods for a look at enterprise applications on mobile devices including smart phones and the iPad. Stay for a demo of self-service or CRM tasks in the Fusion Applications welcome experience. The DEMOgrounds for Oracle Applications are located on the lower level of Moscone West. Hours for the Exhibition Hall are Monday, October 1: 9:30 a.m. to 6:00 p.m. Tuesday, October 2: 9:45 a.m. to 6:00 p.m. Wednesday, October 3: 9:45 a.m. to 4:00 p.m.  Not yet registered for Oracle OpenWorld? Register now!

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• Need help understanding XNA 4.0 BoundingBox vs BoundingSphere Intersection

  - by nerdherd

  I am new to both game programming and XNA, so I apologize if I'm missing a simple concept or something. I have created a simple 3D game with a player and a crate and I'm working on getting my collision detection working properly. Right now I am using a BoundingSphere for my player, and a BoundingBox for the crate. For some reason, XNA only detects a collision when my player's sphere touches the front face of the crate. I'm rendering all the BoundingSpheres and BoundingBoxes as wire frames so I can see what's going on, and everything visually appears to be correct, but I can't figure out this behavior. I have tried these checks: playerSphere.Intersects(crate.getBoundingBox()) playerSphere.Contains(crate.getBoundingBox(), ContainmentType.Intersects) playerSphere.Contains(crate.getBoundingBox()) != ContainmentType.Disjoint But they all seem to produce the same behavior (in other words, they are only true when I hit the front face of the crate). The interesting thing is that when I use a BoundingSphere for my crate the collision is detected as I would expect, but of course this makes the edges less accurate. Any thoughts or ideas? Have I missed something about how BoundingSpheres and BoundingBoxes compute their intersections? I'd be happy to post more code or screenshots to clarify if needed. Thanks!

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