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• Choosing a non microsoft language for web development?

  - by Luke Lowrey

  I am resonably experienced with asp.net and would like to learn a new language with a focus on web development. Licensing and hosting costs are why I would like to use something not reliant on microsoft so something based on open source technologies is a plus. I have had a tiny bit of experience with php and did not like it but I guess I could be convinced otherwise. Basically I'd like to know peoples opinion on the the best language for future web development with regards to longivity, resources, frameworks, hosting etc.

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• LINQ to SQL: To Attach or Not To Attach

  - by bradhe

  So I'm have a really hard time figuring out when I should be attaching to an object and when I shouldn't be attaching to an object. First thing's first, here is a small diagram of my (very simplified) object model. Edit: Okay, apparently I'm not allowed to post images...here you go: http://i.imgur.com/2ROFI.png In my DAL I create a new DataContext every time I do a data-related operation. Say, for instance, I want to save a new user. In my business layer I create a new user. var user = new User(); user.FirstName = "Bob"; user.LastName = "Smith"; user.Username = "bob.smith"; user.Password = StringUtilities.EncodePassword("MyPassword123"); user.Organization = someOrganization; // Assume that someOrganization was loaded and it's data context has been garbage collected. Now I want to go save this user. var userRepository = new RepositoryFactory.GetRepository<UserRepository>(); userRepository.Save(user); Neato! Here is my save logic: public void Save(User user) { if (!DataContext.Users.Contains(user)) { user.Id = Guid.NewGuid(); user.CreatedDate = DateTime.Now; user.Disabled = false; //DataContext.Organizations.Attach(user.Organization); DataContext.Users.InsertOnSubmit(user); } else { DataContext.Users.Attach(user); } DataContext.SubmitChanges(); // Finished here as well. user.Detach(); } So, here we are. You'll notice that I comment out the bit where the DataContext attachs to the organization. If I attach to the organization I get the following exception: NotSupportedException: An attempt has been made to Attach or Add an entity that is not new, perhaps having been loaded from another DataContext. This is not supported. Hmm, that doesn't work. Let me try it without attaching (i.e. comment out that line about attaching to the organization). DuplicateKeyException: Cannot add an entity with a key that is already in use. WHAAAAT? I can only assume this is trying to insert a new organization which is obviously false. So, what's the deal guys? What should I do? What is the proper approach? It seems like L2S makes this quite a bit harder than it should be...

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• Converting Numeric String into Perl's Processable Number

  - by neversaint

  I have a file that contain list of numbers that looks like this: 10^-92 2 10^-14 10^-105 3 10^-20 To explain a bit further 10^-92 is essentially 1E-92 and 2 10^-14 is 2E^-14. Is there a compact way to convert the number in above file into Perl number? At the end I want to sort these number numerically.

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• Use of * in Objective C Syntax

  - by user263097

  I'm struggling a bit with some objective c syntax. Can someone please elaborate on the usage of * in the following instance method. - (IBAction)sliderChanged:(id)sender{ UISlider *slider = (UISlider *)sender; } I realize that we are creating a variable typed as UISlider and then setting it to sender once it is cast as a UISlider. However, I don't understand what the * are for and why UISlider slider = (UISlider)sender; won't work.

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• PHP queue jobs in centOS

  - by Soe Naung Win

  I wrote a PHP shell script which include queuing jobs in centOS with 'at' command. The queue jobs may vary in time and contents which means the system need to keep quite a large number of jobs. The application logic will also be a bit difficult to setup with cronjob. Is there a limit in number of queue jobs in centOS or is there any alternative way of queuing jobs?

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• Delay On Assembler?

  - by Norm

  Hey, I want to know how i can do delay (Timer) on assembler 16 bit on PC. Thank You for helping, Norm. OS: Windows CODE: delay: inc bx cmp bx,WORD ptr[time] je delay2 jmp delay delay2: inc dx cmp dx,WORD ptr[time2] je delay3 jmp delay mov bx,0 delay3: inc cx cmp cx,WORD ptr[time3] je Finish_delay jmp delay its not work good i need less complicated code

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• How to make ARGB transparency using bitwise operators.

  - by Smejda

  I need to make transparency, having 2 pixels: pixel1: {A, R, G, B} - foreground pixel pixel2: {A, R, G, B} - background pixel A,R,G,B are Byte values each color is represented by byte value now I'm calculating transparency as: newR = pixel2_R * alpha / 255 + pixel1_R * (255 - alpha) / 255 newG = pixel2_G * alpha / 255 + pixel1_G * (255 - alpha) / 255 newB = pixel2_B * alpha / 255 + pixel1_B * (255 - alpha) / 255 but it is too slow I need to do it with bitwise operators (AND,OR,XOR, NEGATION, BIT MOVE)

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• Lazy load pages in UIScrollView

  - by jean

  I have a UIScrollView that contains large images and am using paging to scroll between images. In order to save memory, I am loading only one image before and after the currently visible one and loading/releasing new images after a scroll has completed. The problem occurs when one scrolls quickly and scrollViewDidEndDecelerating is not called. How can I detect continuous scrolling? I could check item location on every scrollViewDidScroll but this seems a bit heavy...

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• echo XML values

  - by danit

  Here is my XML: object(SimpleXMLElement)#1 (2) { ["@attributes"]=> array(1) { ["type"]=> string(5) "array" } ["feed"]=> array(3) { [0]=> object(SimpleXMLElement)#2 (6) { ["title"]=> string(34) "Twitter / Favorites from bob" ["id"]=> string(27) "tag:twitter.com,2007:Status" ["link"]=> array(2) { [0]=> object(SimpleXMLElement)#5 (1) { ["@attributes"]=> array(3) { ["type"]=> string(9) "text/html" ["href"]=> string(38) "http://twitter.com/bob/favorites" ["rel"]=> string(9) "alternate" } } [1]=> object(SimpleXMLElement)#6 (1) { ["@attributes"]=> array(3) { ["type"]=> string(20) "application/atom+xml" ["href"]=> string(40) "http://twitter.com/favorites.atom?page=1" ["rel"]=> string(4) "self" } } } ["updated"]=> string(25) "2010-04-01T10:44:19+00:00" ["subtitle"]=> string(56) "Twitter updates favorited by Dan Humpherson / MoodleDan." ["entry"]=> array(20) { [0]=> object(SimpleXMLElement)#7 (7) { ["title"]=> string(104) "smashingmag: Sikuli: a visual technology to search and automate GUIs using images - http://bit.ly/6ArwzP" ["content"]=> string(104) "smashingmag: Sikuli: a visual technology to search and automate GUIs using images - http://bit.ly/6ArwzP" ["id"]=> string(72) "tag:twitter.com,2007:http://twitter.com/smashingmag/statuses/11389386545" ["published"]=> string(25) "2010-03-31T22:06:41+00:00" ["updated"]=> string(25) "2010-03-31T22:06:41+00:00" ["link"]=> array(2) { [0]=> object(SimpleXMLElement)#27 (1) { ["@attributes"]=> array(3) { ["type"]=> string(9) "text/html" ["href"]=> string(51) "http://twitter.com/smashingmag/statuses/11389386545" ["rel"]=> string(9) "alternate" } } [1]=> object(SimpleXMLElement)#28 (1) { ["@attributes"]=> array(3) { ["type"]=> string(10) "image/jpeg" ["href"]=> string(64) "http://a3.twimg.com/profile_images/572829723/original_normal.jpg" ["rel"]=> string(5) "image" } } } ["author"]=> object(SimpleXMLElement)#29 (2) { ["name"]=> string(17) "Smashing Magazine" ["uri"]=> string(31) "http://www.smashingmagazine.com" } } For the life of me I cannot get my code to work, all I want to do is echo the entry->content string but no matter what I try I get nothing. Can anyone assist an inept PHP n00b?

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• Microsoft Robotics Studio with Wine ? Is it possible ?

  - by Arkapravo

  I am using Ubuntu 9.10 and I am a bit of a robotics enthusiast. I have used KiKS (in MATLAB for simulating Khepera robots), MobotSim (in Windows, simulates a point like robot using a BASIC editor) and Player Stage/Gazebo (with C/C++ on Ubuntu Linux). My question, can MS Robotics Studio be installed in Ubuntu Linux using Wine (I am using 1.1.31) ? Has anyone done it ? Thanks for your reply !

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• Regex slow on Windows Server 2008

  - by pjmyburg

  Hi I have a situation where my regular expressions compile extremely slowly on Windows Server 2008. I wrote a small console application to highlight this issue. The app generates its own input and builds up a Regex from words in an XML file. I built a release version of this app and ran it both on my personal laptop (running XP) and the Windows 2008 server. The regular expression took 0.21 seconds to compile on my laptop, but 23 seconds to compile on the server. Any ideas what could be causing this? The problem is only on first use of the Regex (when it is first compiled - thereafter it is fine) I have also found another problem - when using \s+ in the regular expression on the same Windows 2008 server, the memory balloons (uses 4GB+) and the compilation of the Regex never finishes. Is there a known issue with Regex and 64 bit .net? Is there a fix/patch available for this? I cannot really find any info on the net, but I have found a few articles about this same issues in Framework 2.0 - surely this has been fixed by now? More info: The server is running the 64 bit version of the .net framework (3.5 SP1) and on my laptop I have Visual Studio 2008 and the 3.5 framework installed. The regular expression is of the following pattern: ^word$|^word$|^word$ and is constructed with the following flags: RegexOptions.IgnoreCase | RegexOptions.Compiled Edit: Here is a code snippet: StringBuilder regexString = new StringBuilder(); if (!String.IsNullOrEmpty(fileLocation)) { XmlTextReader textReader = new XmlTextReader(fileLocation); textReader.Read(); while (textReader.Read()) { textReader.MoveToElement(); if (textReader.Name == "word") { regexString.Append("^" + textReader.GetAttribute(0) + "$|"); } } ProfanityFilter = new Regex(regexString.ToString(0, regexString.Length - 1), RegexOptions.IgnoreCase | RegexOptions.Compiled); } DateTime time = DateTime.Now; Console.WriteLine("\nIsProfane:\n" + ProfanityFilter.IsMatch("test")); Console.WriteLine("\nTime: " + (DateTime.Now - time).TotalSeconds); Console.ReadKey(); This results in a time of 0.21 seconds on my laptop and 23 seconds on the 2008 server. The XML file consists of 168 words in the following format: <word text="test" />

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• C# Putting the required DLLs somewhere other than the root of the output

  - by aip.cd.aish

  I am using EmguCV for a project and when our program runs it needs some dlls like "cxcore.dll" etc. (or it throws runtime exceptions). At the moment, I put the files in the root of the output folder (selected "Copy Always" in the file's properties in Visual Studio). However it looks a bit messy, to have about 10 different dlls just there. Is there someway where I can move it to a subfolder in the output folder and it'll still find it.

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• In WPF, What is the best way to create toolbar buttons so that the images are properly scaled?

  - by T.R.

  Specifically, I'm looking to use the 16*16 32-bit png images included with the VS2008ImageLibrary. I've tried manually setting the Height and Width attributes of the image, adjusting margins and padding, adjusting Stretch and RenderOptions. My attempts to create toolbar buttons have all led to either Improper Scaling (blurry icons), the bottom row of pixels on the icon being truncated, or the toolbar button being improperly sized - not to mention the disappearing icons already mentioned Here. Has anyone found the best way to make standard, VisualStudio/WinForms-style toolbar buttons that display properly in WPF?

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• Fluent interface and task based applications

  - by Mmarquee

  We have a number of applications that are now looking tired and a bit drab. Looking at the MS style fluent interface looks nice but seems (to me) to be more document based rather than task based. Is there a nice 'modern' ui style that lends itself to task based applications?

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• Handling empty UITableView in UITableViewController

  - by Travis

  I have a UITableViewController that is populated with some data. If the data comes back empty, obviously the table is empty. What is the appropriate method to use to handle this case and put up something like a UILabel with "No Data Available". I have been using - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section but it's proven a bit cumbersome and I'm not longer confident it's the best place to do this.

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• Return ArrayList from .net web service to android application using kSoap

  - by benjamin schultz

  My web service is returning quite a bit of data, so i'm storing it in an arraylist and returning that to my application. I don't know whether or not this is the preferred method or not. When the arraylist is returned and displayed in my application, it also displays the arraylists "anyType" section. I'm new to this whole process so i'm sure i'm missing something somewhere or going about this incorrectly. Can anyone point me in the right direction please?

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• Map /dev/bus/usb node to /sys node on Linux

  - by Cody Brocious

  I'm using libusb to find and access a USB device, but once I get the information I need from there, I need to map it to a /sys node. This could be to the actual USB bus it's on, the /sys/bus/usb-serial node (which is where I'm going to get eventually), or effectively anywhere else since I can walk the tree from there. I can get to a /dev/bus/usb node easily enough, but I'm a bit lost from there. What would be the best route to perform this mapping?

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• App.Config or XAML

  - by Florian Doyon

  Hi ladies(?) and gents, I am currently evaluating my options for a rewrite of the projects I'm working on and I am a bit miffed by the stringly-typed nature of our app.config files. I'd like to move to a more structured approach, so I have two options: Use custom SectionHandlers in the app.config Scrap app.config and use XAML instead. I'd like to get your opinions and horror stories on this, what are the pros and cons of using XAML for this? Cheers, Florian

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• Executing Custom Actions immediately in WIX

  - by jbloomer

  Is there any way to execute a custom action in WIX as soon as the first dialog (welcome) appears? The requirement is to check prerequisites, and some of those require a custom action. The custom action could be executed as we click to the next dialog, but then the standard WIX prereqs are determined apart from our custom prereq. (The custom action we need is to check that IIS 6 Metabase Compatibility is turned on and a registry search does not work on x64 machines with a 32-bit installer)

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• setTimeout() not executing

  - by Ben Shelock

  I've got this simple function which displays a message to the user. If I add the timeout parameter it will slide back up automatically if not the user has to click it to get rid. But the timeout bit isn't working. function feedback(text, timeout){ $('#feedback').text(text).slideDown('fast'); $('#feedback').click(function(){ $(this).slideUp(); }); if(timeout){ setTimeout(function(){ $('#feedback').slideup(); }, timeout); } }

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• Navbar List Items Not Showing in Internet Explorer 6

  - by Theo

  Hi everyone, I have a bit of a problem with a navbar not displaying correctly in IE6. http://classicpartsltd.com/ - this is the page, and if you hover over a nav item such as 'Goggles' in IE6 you will see that some of the list items are showing up, but that they will in IE7 and IE8... Does anyone know why this would be the case? Many thanks, Theo.

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• Blogs / books with advise, tips and information from developers

  - by Wizzard

  Good Morning. I've been reading Joel Spolsky's (joelonsoftware) articles and they are full of good information and tips. He's a good writer and well worth reading. I am wondering what other good blogs/articles/books are out there written by similar people - really after leaders/managers/biz owners who are/were developers. Hope that makes a bit of sense ;-)

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• How do you setup the Audio plugin for Flowplayer?

  - by codeninja

  I'm having a bit of trouble getting the Audio player to work. Basically I want to initiate an mp3 player doing something like this <a href="path-to-my-audio.mp3" id="player" ></a> and then use the $f() call to initate the player. I've followed the instructions here (http://flowplayer.org/plugins/streaming/audio.html) This doesnt seem to be work and I'm not sure what's wrong because I'm able to play videos in this way. Thanks for your help!

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• How is parsing phase in a compiler different from a rule engine ?

  - by abhinav

  Hi, I have a rough understanding of how the compilers work (I mean languages, grammars, lexical analysis, parsing etc). The rule engines have various rules and associated action, just like you have rules in the grammars and you can associate actions with them in parser-generator tools like ANTLR. So I am a bit confused on how to differentiate between these two. Could anyone give a clearer, more formal explanation for the differences ? Thanks, Abhinav.

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• C# multi CPU for ThreadPool.QueueUserWorkItem

  - by ikurtz

  I have a program that uses: ThreadPool.QueueUserWorkItem(new WaitCallback(FireAttackProc), fireResult); On Windows7 and Vista it works fine. When I try to run it on XP the result is a bit different from the others. I was just wondering in order to execute QueueUserWorkItem properly do I need a dual CPU system? The XP I tried to test on had .Net 3.5 installed. Inputs most welcome.

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