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• best way to host multiple wordpress site on single vps [migrated]

  - by Ben

  Not sure if this is webmaster or a WordPress question, it's a bit half and half, sorry if I'm posting in the wrong place. Without using Multi-Site or installing new WordPress CMS' in second-level domains, what's the best way to get multiple WordPress installs running on my VPS (running Linux powered CentOS 6 with WHM and cPanel)? It's currently working but only by setting the permalinks option to the default setting, so the URLs aren't human-friendly. I have come across something called WPSiteStack, though I'd really rather not go down this route. Long story short, I need the following: Seperate installs so one core / theme / plugin update doesn't affect all sites and increases security of all sites; 'Pretty' permalinks; Each WordPress install must be in the root of it's own domain to ensure that I can accurately measure my clients' quotas; It may also be worth noting that some functions within each install use the $_SERVER['DOCUMENT_ROOT'] and $_SERVER['HOST'] variables. I have already edited the httpd-vhosts.conf, httpd.conf and .htaccess files but this hasn't made any changes. So any ideas what I'm missing or doing wrong? Any help is much appreciated.

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• When can you call yourself good at language X?

  - by SoulBeaver

  This goes back to a conversation I've had with my girlfriend. I tried to tell her that I simply don't feel adequate enough in my programming language (C++) to call myself good. She then asked me, "Well, when do you consider yourself good enough?" That's an interesting question. I didn't know what to tell her. So I'm asking you. For any programming language, framework or the like, when do you reach a point were you sit back, look at what you've done and say, "Hey, I'm actually pretty good at this."? How do you define "good" so that you can tell others, honestly, "Yeah, I'm good at X". Additionally, do you reach these conclusions by comparing what others can do? Additional Info I have read the canonical paper on how it takes ten-thousand hours before you are an expert on the field. (Props to anybody that knows what this paper is called again) I have also read various articles from Coding Horror about interviewing people. Some people, it was said, "Cannot function outside of a framework." So they may be "good" for that framework, but not otherwise in the language. Is this true?

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• VBScript and Xpath excluding duplicates [closed]

  - by Malachi

  I am trying to pull names from an XML Document using a vbscript. XML Document structure <Aliases> <Alias PartyType="DF" CaseID="000000" NameType=""> Name Name</Alias> <Alias PartyType="DF" CaseID="000000" NameType=""> Name Name</Alias> <Alias PartyType="DF" CaseID="000000" NameType=""> Name Name</Alias> ... </Aliases> the XML File might have 100 rows with the same name coming from several different CaseID's because for this part of my vbscript I am trying to pull all the different Names from all cases, but here is the issue, I don't want to return duplicates. is there a way to do this with an xPath Expression or should I try to do this with VBScript? EDIT I am pretty sure that I am going to have to do this with VBScript. Would it be Faster and more efficient to solve this issue in VBScript, xPath, or in populating the XML I am retrieving information from ( this might prove more difficult than the other two options ) I am also asking a Similar question on stackoverflow

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• MVC Scaffold Template Not Generating?

  - by monkey9987

  Been working on an MVC project and my templates were not generating. I first created my Model inside my "Models" folder, then did a quick compile. Next I went to the Views folder to get it created, right click and say "Add View" then I clicked the checkbox to create an edit page. What happened was the template would never seem to pull in my Model, it would just have the default header items, but the entire model was missing.  My model was defined as follows: public class LogOnModel { [Required][Display(Name = "User name")]public string UserName;[Required][DataType(DataType.Password)][Display(Name = "Password")]public string Password;[Display(Name = "Remember me?")]public bool RememberMe; } See anything wrong with that? I couldn't figure out why each time I created my View and selected the option to create the "Edit" scaffold automatically, it would come up blank. Turns out I'm missing my get / set methods on the Model class items. Here's my code with the correct setup: public class LogOnModel { [Required][Display(Name = "User name")]public string UserName { get; set; } [Required][DataType(DataType.Password)][Display(Name = "Password")]public string Password { get; set; }[Display(Name = "Remember me?")]public bool RememberMe { get; set; } }  I hope that helps someone out, it's pretty simple when I look at it now, but that's always the case!  ~ Steve

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• What should a developer know before building a public web site?

  - by Joel Coehoorn

  What things should a programmer implementing the technical details of a web site address before making the site public? If Jeff Atwood can forget about HttpOnly cookies, sitemaps, and cross-site request forgeries all in the same site, what important thing could I be forgetting as well? I'm thinking about this from a web developer's perspective, such that someone else is creating the actual design and content for the site. So while usability and content may be more important than the platform, you the programmer have little say in that. What you do need to worry about is that your implementation of the platform is stable, performs well, is secure, and meets any other business goals (like not cost too much, take too long to build, and rank as well with Google as the content supports). Think of this from the perspective of a developer who's done some work for intranet-type applications in a fairly trusted environment, and is about to have his first shot and putting out a potentially popular site for the entire big bad world wide web. Also: I'm looking for something more specific than just a vague "web standards" response. I mean, HTML, JavaScript, and CSS over HTTP are pretty much a given, especially when I've already specified that you're a professional web developer. So going beyond that, Which standards? In what circumstances, and why? Provide a link to the standard's specification. This question is community wiki, so please feel free to edit that answer to add links to good articles that will help explain or teach each particular point. To search in only the answers from this question, use the inquestion:this option.

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• Moving all UI logic to Client Side?

  - by Mag20

  Our team originally consisted of mostly server side developers with minimum expertise in Javascript. In ASP.NET we used to write a lot of UI logic in code-behind or more recently through controllers in MVC. A little while ago 2 high level client side developers joined our team. They can do in HTMl/CSS/Javascript pretty much anything that we could previously do with server-side code and server-side web controls: Show/hide controls Do validation Control AJAX refreshing So I started to think that maybe it would be more efficient to just create a high level API around our business logic, kinda like Amazon Fulfillment API: http://docs.amazonwebservices.com/fws/latest/APIReference/, so that client side developers would fully take over the UI, while server side developers would only concentrate on business logic. So for ordering system you would have a high level API like: OrderService.asmx CreateOrderResponse CreateOrder(CreateOrderRequest) AddOrderItem AddPayment - SubmitPayment - GetOrderByID FindOrdersByCriteria ... There would be JSON/REST access to API, so it would be easy to consume from client-side UI. We could use this API for both internal UI development and also for 3-rd parties to create their own applications. With advances in Javascript and availability of good client side developers, is it a good time to get rid of code-behind/controllers and just concentrate on developing high level APIs (ala Amazon) that client side developers can consume?

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• Calling a .NET C# class from XSLT

  - by HanSolo

  If you've ever worked with XSLT, you'd know that it's pretty limited when it comes to its programming capabilities. Try writing a for loop in XSLT and you'd know what I mean. XSLT is not designed to be a programming language so you should never put too much programming logic in your XSLT. That code can be a pain to write and maintain and so it should be avoided at all costs. Keep your xslt simple and put any complex logic that your xslt transformation requires in a class. Here is how you can create a helper class and call that from your xslt. For example, this is my helper class:  public class XsltHelper     {         public string GetStringHash(string originalString)         {             return originalString.GetHashCode().ToString();         }     }   And this is my xslt file(notice the namespace declaration that references the helper class): <?xml version="1.0" encoding="UTF-8" ?> <xsl:stylesheet  xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0" xmlns:ext="http://MyNamespace">     <xsl:output method="text" indent="yes" omit-xml-declaration="yes"/>     <xsl:template  match="/">The hash code of "<xsl:value-of select="stringList/string1" />" is "<xsl:value-of select="ext:GetStringHash(stringList/string1)" />".     </xsl:template> </xsl:stylesheet>   Here is how you can include the helper class as part of the transformation: string xml = "<stringList><string1>test</string1></stringList>";             XmlDocument xmlDocument = new XmlDocument();             xmlDocument.LoadXml(xml);               XslCompiledTransform xslCompiledTransform = new XslCompiledTransform();             xslCompiledTransform.Load("XSLTFile1.xslt");               XsltArgumentList xsltArgs = new XsltArgumentList();                        xsltArgs.AddExtensionObject("http://MyNamespace", Activator.CreateInstance(typeof(XsltHelper)));               using (FileStream fileStream = new FileStream("TransformResults.txt", FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite))             {                 // transform the xml and output to the output file ...                 xslCompiledTransform.Transform(xmlDocument, xsltArgs, fileStream);                            }

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• What is a Coding Dojo?

  - by huwyss

  Recently i found out that there is a thing called "coding dojo". The point behind it is that software developers want to have a space to learn new stuff like processes, methods, coding details, languages, and whatnot in an environment without stress. Just for fun. No competition. No results required. No deadlines.Some days ago I joined the Zurich coding dojo. We were three programmers with different backgrounds.We gave ourselves the task to develop a method that takes an input value and returns its prime factors. We did pair programming and every few minutes we switched positions. We used test driven development. The chosen programming language was Ruby.I haven't really done TDD before. It was pretty interesting to see the algorithm develop following the testcases.We started with the first test input=1 then developed the most simple productive program that passed this very first test. Then we added the next test input=2 and implemented the productive code. We kept adding tests and made sure all tests are passed until we had the general solution.When we improved the performance of our code we saw the value of the tests we wrote before. Of course our first performance improvement broke several tests.It was a very interesting experience to see how other developers think and how they work. I will participate at the dojo again and can warmly recommend it to anyone. There are  coding dojos all over the world.Have fun!

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• Usual Suspects: Typical 3rd Party Entities in E-Commerce [closed]

  - by zharvey

  I am doing some requirements/analysis for a web app that I'd like to build (Ruby/Java developer here). This web app would have a store front, shopping cart and would need to be totally compliant with all e-com best practices. It's amazing how much non-technical info comes up when you search for phrases like "how does e-commerce work", but very little comes up in the way of technical details. As such, I'm having extreme frustration finding answers to what I consider pretty straight-forward questions. I came here because I believe this question is not off-topic; if it is, please leave a comment as to why this question does not belong here and I will happily remove it myself (upvotes if your comment can point me to the correct place for this question!). So then: What 3rd parties will I need to work with to have a modern, web-compliant e-com site? So far I can account for a payment gateway provider like Authorize.net and an SSL certificate provider like Trustwave. Any others? What other standards besides PCI compliance will I be held to (besides governing laws, of course!)? Vulnerability scans: PCI compliance requires quarterly scans: if I'm a "Level 4" (low volume) Merchant does that still apply to me? Irregardless, my backend architecture is quite huge, with web servers, app servers, database, message brokers and more. Do each of these servers need to be scanned?!? If not what servers do need to get these quarterly scans? I usually hate to ask micro-questions inside of one large one, but these are so closely-related I just felt like asking them all separately would be spamming the site with too many petty questions. Thanks in advance!

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• Help with dual booting Windows 8.1 Professional and Ubuntu 13.10

  - by user1292548

  I recently installed a clean version of Windows 8.1 Professional on my Lenovo Y500 (with Samsung 256GB 840 Pro SSD). I have Windows all set up and running normally. I am trying to dual boot Windows 8.1 and Ubuntu 13.10, but the installation procedure don't allow me to either "Install alongside..." or shows my SSD partitions correctly when I chose the "Something Else" option. I have created a 25GB partition of free space in the Windows disk manager, but on the installation screen on Ubuntu, it shows the whole drive as a free space. I have tried installing with a burned .ISO disk and a bootable USB, the results are the same for both. Windows Disk Management screen: http://imageshack.us/a/img855/9504/59zu.jpg The Ubuntu installation screen: http://imageshack.us/a/img62/2712/9g6i.jpg I've ran into this problem before when trying to dual boot Ubuntu and Windows 7 Professional a month ago. But I gave up and never resolved the issue. --EDIT-- I tried what Eero Aaltonen suggested, and this is my result: ubuntu@ubuntu:~$ sudo parted /dev/sda print Warning: /dev/sda contains GPT signatures, indicating that it has a GPT table. However, it does not have a valid fake msdos partition table, as it should. Perhaps it was corrupted -- possibly by a program that doesn't understand GPT partition tables. Or perhaps you deleted the GPT table, and are now using an msdos partition table. Is this a GPT partition table? Yes/No? yes Model: ATA Samsung SSD 840 (scsi) Disk /dev/sda: 256GB Sector size (logical/physical): 512B/512B Partition Table: gpt Number Start End Size File system Name Flags ubuntu@ubuntu:~$

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• Shutdown issue on persistent LiveUSB

  - by John K

  A) Downloaded Ubuntu to a Windows 7 temp directory from: http://www.ubuntu.com/download/ubuntu/download (Ubuntu 11.10 - Latest version / 32-bit). The output was a .iso file. B) Created a bootable USB stick using Universal USB Installer: http://www.pendrivelinux.com/universal-usb-installer-easy-as-1-2-3/. Did not select "Persistent file". Result: Tried it in a Dell Latitude D630 Dell laptop: works every time, many startups and shutdowns. C) Repeated B) but with "Persistent file" set. Works once or twice, but then, just locks on the Ubuntu splash screen. E) Downloaded LiveUSB Install from http://live.learnfree.eu/download, which created a file on Windows 7 called live-usb-install-2.3.2.exe. F) Ran the above installer with "Persistent file" to a 4GB ScanDisk (formatted) thumb drive. Result: Worked pretty good for a while. Shutdown and rebooted several times. Changed items like creating a new directories - all worked. Then: Setup an Admin account with a password and no auto login. On next reboot, it required the password and logged in correctly. Tried to shutdown via the top left icon - Shutdown menu option. Key issue: Would not shutdown, but would always go back to the login prompt. Could successfully login. Finally, shutdown (which just put me back to the login window), and hard shutdown with the power switch. Result: On reboot, just locks on the Ubuntu splash screen. Questions (note, very new to Linux): Did I shutdown wrong (I mean prior to the hard power off)? Is the persistence option very unstable, or am I doing something else completely wrong?

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• Name for Osherove's modified singleton pattern?

  - by Kazark

  I'm pretty well sold on the "singletons are evil" line of thought. Nevertheless, there are limited occurrences when you want to limit the creation of an object. Roy Osherove advises, If you're planning to use a singleton in your design, separate the logic of the singleton class and the logic that makes it a singleton (the part that initializes a static variables, for example) into two separate classes. That way, you can keep the single responsibility principle (SRP) and also have a way to override singleton logic. (The Art of Unit Testing 261-262) This pattern still perpetuates the global state. However, it does result in a testable design, so it seems to me to be a good pattern for mitigating the damage of a singleton. However, Osherove does not give a name to this pattern; but naming a pattern, according to the Gang of Four, is important: Naming a pattern immediately increases our design vocabulary. It lets us design at a higher level of abstraction. (3) Is there a standard name for this pattern? It seems different enough from a standard singleton to deserve a separate name. Decoupled Singleton, perhaps?

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• Account Listings on APress and O'Reilly

  - by TATWORTH

  Originally posted on: http://geekswithblogs.net/TATWORTH/archive/2013/06/20/e-books-from-apress-and-oreilly.aspxIn recent days both APress and O'Reilly have radically improved the way they display items registered against your account with them.APress now show only one line per e-book and the multitude of formats is handled by a drop-down list. The result is that the list of APress books I have bought now requires less paging through. The only things that the APress lacks are:The ability to show all on the page (currently options for 10,20 and 50 per page)The ability to sort on title or date bought or date updatedO'Reilly have always shown the formats available by a series of hyperlinks along one line. They have improved their list as follows:You can sort on title or date bought or date updatedClicking on a line shows full detail of the item (include image, download details, errata link and catalog page). Clicking again collapses the detail.You can select all your purchased items together or just show E-Books or Print or VideosNow why is the date updated important? Updates are issued for various books  (particularly those made available whilst still being written) - the publishers very kindly email you when an update is available but finding it in the list to download it again is not as easy as you think, however sort on release date and they are easy to find!

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• Too many heap subpools might break the upgrade

  - by Mike Dietrich

  Recently one of our new upcoming Oracle Database 11.2 reference customers did upgrade their production database - a huge EBS system - from Oracle 9.2.0.8 to Oracle Database 11.2.0.2. They've tested very well, we've optimized the upgrade process, the recompilation timings etc.  But once the live upgrade was done it did fail in the JAVA component piece with this error: begin if initjvmaux.startstep('CREATE_JAVA_SYSTEM') then * ORA-29553: classw in use: SYS.javax/mail/folder ORA-06512: at "SYS.INITJVMAUX", line 23 ORA-06512: at line 5 Support diagnosis was pretty quick - and refered to:Bug 10165223 - ORA-29553: class in use: sys.javax/mail/folder during database upgrade But how could this happen? Actually I don't know as we have used the same init.ora setup on test and production. The only difference: the prod system has more CPUs and RAM. Anyway, the bug names as workarounds to either decrease the SGA to less than 1GB or decrease the number of heap subpools to 1. Finally this query did help to diagnose the number of heap subpools: select count(distinct kghluidx) num_subpools from x$kghlu where kghlushrpool = 1; The result was 2 - so we did run the upgrade now with this parameter set: _kghdsidx_count=1 And finally it did work well. One sad thing:After the upgrade did fail Support did recommend to restore the whole database - which took an additional 3-4 hours. As the ORACLE SERVER component has been already upgraded successfully at the stage where the error did happen it would have been fine to go on with the manual upgrade and start catupgrd.sql script. It would have been detected that the ORACLE SERVER is upgraded already and just picked up the non-upgraded components. The good news:Finally I had one extra slide to add to our workshop presentation

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• When to use each user research method

  - by user12277104

  There are a lot of user research methods out there, but sometimes we get stuck in a rut, conducting all formative usability testing before coding, or running surveys to gather satisfaction data. I'll be the first to admit that it happens to me, but to get out of a rut, it just takes a minute to look at where I am in the design & development cycle, what kind(s) of data I need, and what methods are available to me. We need reminders, or refreshers, every once in a while. One tool I've found useful is a graphic organizer that I created many years ago. It's been through several revisions, as I've adapted it to the product cycles of the places I've worked, changed my mind about how to categorize it, and added methods that I've used or created over time. I shared a version of this table at the 2012 International UPA conference, and I was contacted by someone yesterday who wanted to use it in a university course on user-center design. I was flattered at the the thought, but embarrassed, because I was sure it needed updating -- that was a year ago, after all. But I opened it today, and really, there's not much I'd change -- sure, I could add some nuance regarding what types of formative testing, such as modality (remote, unmoderated remote, or in-person) or flavor of testing (RITE, RITE-Krug, comparative, performance), but I think it's pretty much ok as is. Click on the image below, to get the full-size PDF. And whether it's entirely "right" or "wrong" isn't the whole value of looking at these methods across the product lifecycle. The real value lies in the reminder that I have options. And what those options are change as the field changes, so while I don't expect this graphic to have an eternal shelf life, it's still ok a year after I last updated it. That said, if you find something missing or out of place, let me know :) 

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• Network connection fails when downloading data

  - by Guus

  In the past few weeks, I've noticed my network connection becoming unstable while downloading files. I'm not sure how to diagnose this issue. I've found that my network connections appear to be temporarily unresponsive (for periods up to a minute or so) while I'm downloading a file (that's large enough to not be downloaded instantly). The problem occurs when downloading data through a webbrowser, but also when using SCP to download data from a remote location. During the period in which network connections are unresponsive, every resource that I try to access over the network is unavailable. This includes: The download itself (SCP reports a 'stalled' download) Web pages (won't load - browsers report 'resource unavailable') SSH sessions (CLI freezes) VPN connections (connections terminate) IM client connections (client starts reconnection attempts) ... (everything is pretty much dead) I've noticed that during such a period, I cannot even access the (web-based) administrative console of the router on my LAN at home (although it remains reachable for other devices). The problem occurs when connected to my home network, but also when I'm in the office. Other devices than my laptop are not affected. Given the above two characteristics I assume the problem cause lies within my laptop, not the network infrastructure. I'm running Ubuntu 11.10. Apart from applying automatic updates from Ubuntu, I can't think of a change that I applied to the OS that could have started the problems. I'm absolutely positive that this issue did not occur up to a few weeks ago (as it's very noticeable, and only started to annoy me in the last few days). When the problem occurs, applications that make use of a network connection fail visibly (I get popups telling me that a VPN connection is broken, for instance). The network manager does not report any issues related to my wifi-connection though. Help?

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• FREE goodies if you are a UK based software house already live on the Windows Azure Platform

  - by Eric Nelson

  In the UK we have seen some fantastic take up around the Windows Azure Platform and we have lined up some great stuff in 2011 to help companies fully exploit the Cloud – but we need you to tell us what you are up to! Once you tell us about your plans around Windows Azure, you will get access to FREE benefits including email based developer support and free monthly allowance of Windows Azure, SQL Azure and AppFabric from Jan 2011 – and more! (This offer is referred to as Cloud Essentials and is explained here) And… we will be able to plan the right amount of activity to continue to help early adopters through 2011. Step 1: Sign up your company to Microsoft Platform Ready (you will need a windows live id to do this) Step 2: Add your applications For each application, state your intention around Windows Azure (and SQL etc if you so wish) Step 3: Verify your application works on the Windows Azure Platform Step 4 (Optional): Test your application works on the Windows Azure Platform Download the FREE test tool. Test your application with it and upload the successful results. Step 5: Revisit the MPR site in early January to get details of Cloud Essentials and other benefits P.S. You might want some background on the “fantastic take up” bit: We helped over 3000 UK companies deploy test applications during the beta phase of Windows Azure We directly trained over 1000 UK developers during 2010 We already have over 100 UK applications profiled on the Microsoft Platform Ready site And in a recent survey of UK ISVs you all look pretty excited around Cloud – 42% already offer their solution on the Cloud or plan to.

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• The Most Ridiculous Computer Cameos of All Time

  - by Jason Fitzpatrick

  For the last half century computers have played all sorts of major and minor roles in movies; check out this collection to see some of the more quirky and out-of-place appearances. Wired magazine rounds up some of the more oddball appearances of computers in film. Like, for example, the scene shown above from Soylent Green: Spoiler alert: Soylent Green is people! But that’s not the only thing we’re gonna spoil. Soylent Green is set in 2022, and at one point, you’ll notice that a government facility is still using a remote calculator that plugs into the CDC 6600, a machine that was state-of-the-art in 1971. Come to think of it, we should scratch this from the list. This is pretty close to completely accurate. Hit up the link below to check out the full gallery, including a really interesting bit about how the U.S. Government’s largest computer project–once decommissioned and sold as surplus–ended up on the sets of dozens of movies and television shows. The Most Wonderfully Ridiculous Movie Computers of All Time [Wired] Why Enabling “Do Not Track” Doesn’t Stop You From Being Tracked HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference

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• Is a big name computer science degree worth the cost?

  - by Serplat

  I'm currently in High School and trying to look into what I want to do after I graduate. I know that I will be going to college, and that I want a degree in Computer Science, however, I'm not entirely sure where I want to go (I haven't started the application process yet). I already have built up a decent amount of experience in programming (over the summers I have been hired to program at a local university), and I'm pretty capable of teaching myself most of the material I've come across through either books or web documentation. I'm interested in whether it is worth it to get a degree from a major, big-name computer science university for $50,000 each year, as opposed to going to a local state school for only $20,000. For my Bachelor's degree alone, this would be $120,000 more than the state school. I've also heard that where you get your Bachelor's doesn't matter much if you plan to get a Master's degree. Many people recommend going somewhere like a state school for your Bachelor's, and then try to get into a more major school for your Master's. Has anybody found any truth in this? Basically, is going to a big name computer science school for a Bachelor's degree really worth the added expense?

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• After upgrading to trusty, ALSA midi connection (aconnect) doesn't seem to work right

  - by SougonNaTakumi

  Previously in kubuntu 13.10 I was able to open vmpk or plug in a midi keyboard, and provided that TiMidity was running in server mode, I could run aconnect [keyboard port (129:0 for vmpk)] 14:0 aconnect 14:0 128:0 and I could play the keyboard and get sound. But now, a while after upgrading to trusty, I tried to do that, and didn't get any sound. TiMidity itself still plays files fine, but if I try to play them with aplaymidi, I still just get silence. Oddly, the midi files are clearly being read. When I ran (where 130:0 was vmpk's input port) aplaymidi -p 130:0 ~/path/to/midi.mid vmpk was highlighting notes on the piano as if it were playing the midi. One time I tried this, TiMidity (?) very briefly played a fraction of a second of the first chord of my song before everything went silent and vmpk just highlighted the first voice on the keyboard as usual. Now the weirdest part of this is that probably about 40% of the time, when I've played at least one note with either aplaymidi or vmpk, when I run aconnect -x I get a sudden burst of a note or chord from my speakers (that is, if I played one note, I get a note; if I played multiple sequential notes, they turn into a chord), as if the notes were being queued up but not being played and that somehow liberated them. I have no idea what's going on there. A little while ago I remember having a problem with Audacity playing wav files sped up and also locking up if I tried to pause it, which it stopped doing when I set the audio devices to the actual audio devices rather than pulse. But now when I checked again, it's doing the opposite: it won't play audio at all and/or acts weirdly if I don't set the audio devices to pulse, and either way will very occasionally randomly do the speeding up thing regardless. Oddly in the midst of what's looking like a pretty screwed up sound system, sound in VLC and Firefox has been working fine and if I play a wav file with aplay ~/path/to/sound.wav that works fine too. Any idea what I could do to figure out what's wrong with ALSA and/or fix it?

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• Example of DOD design

  - by Jeffrey

  I can't seem to find a nice explanation of the Data Oriented Design for a generic zombie game (it's just an example, pretty common example). Could you make an example of the Data Oriented Design on creating a generic zombie class? Is the following good? Zombie list class: class ZombieList { GLuint vbo; // generic zombie vertex model std::vector<color>; // object default color std::vector<texture>; // objects textures std::vector<vector3D>; // objects positions public: unsigned int create(); // return object id void move(unsigned int objId, vector3D offset); void rotate(unsigned int objId, float angle); void setColor(unsigned int objId, color c); void setPosition(unsigned int objId, color c); void setTexture(unsigned int, unsigned int); ... void update(Player*); // move towards player, attack if near } Example: Player p; Zombielist zl; unsigned int first = zl.create(); zl.setPosition(first, vector3D(50, 50)); zl.setTexture(first, texture("zombie1.png")); ... while (running) { // main loop ... zl.update(&p); zl.draw(); // draw every zombie } Or would creating a generic World container that contains every action from bite(zombieId, playerId) to moveTo(playerId, vector) to createPlayer() to shoot(playerId, vector) to face(radians)/face(vector); and contains: std::vector<zombie> std::vector<player> ... std::vector<mapchunk> ... std::vector<vbobufferid> player_run_animation; ... be a good example? Whats the proper way to organize a game with DOD?

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• What's the best way to manage error logging for exceptions?

  - by Peter Boughton

  Introduction If an error occurs on a website or system, it is of course useful to log it, and show the user a polite message with a reference code for the error. And if you have lots of systems, you don't want this information dotted around - it is good to have a single centralised place for it. At the simplest level, all that's needed is an incrementing id and a serialized dump of the error details. (And possibly the "centralised place" being an email inbox.) At the other end of the spectrum is perhaps a fully normalised database that also allows you to press a button and see a graph of errors per day, or identifying what the most common type of error on system X is, whether server A has more database connection errors than server B, and so on. What I'm referring to here is logging code-level errors/exceptions by a remote system - not "human-based" issue tracking, such as done with Jira,Trac,etc. Questions I'm looking for thoughts from developers who have used this type of system, specifically with regards to: What are essential features you couldn't do without? What are good to have features that really save you time? What features might seem a good idea, but aren't actually that useful? For example, I'd say a "show duplicates" function that identifies multiple occurrence of an error (without worrying about 'unimportant' details that might differ) is pretty essential. A button to "create an issue in [Jira/etc] for this error" sounds like a good time-saver. Just to re-iterate, what I'm after is practical experiences from people that have used such systems, preferably backed-up with why a feature is awesome/terrible. (If you're going to theorise anyway, at the very least mark your answer as such.)

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• Sitecore Item Web API and Json.Net Test Drive (Part II –Strongly Typed)

  - by jonel

  In the earlier post I did related to this topic, I have talked about using Json.Net to consume the result of Sitecore Item Web API. In that post, I have used the keyword dynamic to express my intention of consuming the returned json of the API. In this article, I will create some useful classes to write our implementation of consuming the API using strongly-typed. We will start of with the Record class which will hold the top most elements the API will present us. Pretty straight forward class. It has 2 properties to hold the statuscode and the result elements. If you intend to use a different property name in your class from the json property, you can do so by passing a string literal of the json property name to the JsonProperty attribute and name your class property differently. If you look at the earlier post, you will notice that the API returns an array of items that contains all of the Sitecore content item or items and stores them under the result->items array element. To be able to map that array of items, we have to write a collection property and decorate that with the JsonProperty attribute. The JsonItem class is a simple class which will map to the corresponding item property contained in the array. If you notice, these properties are just the basic Sitecore fields. And here’s the main portion of this post that will binds them all together. And here’s the output of this code. In closing, the same result can be achieved using the dynamic keyword or defining classes to map the json propery returned by the Sitecore Item Web API. With a little bit more of coding, you can take advantage of power of strongly-typed solution. Have a good week ahead of you.

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• How should I architect a personal schedule manager that runs 24/7?

  - by Crawford Comeaux

  I've developed an ADHD management system for myself that's attempting to change multiple habits at once. I know this is counter to conventional wisdom, but I've tried the conventional for years & am now trying it my way. (just wanted to say that to try and prevent it from distracting people from the actual question) Anyway, I'd like to write something to run on a remote server that monitors me, helps me build/avoid certain habits, etc. What this amounts to is a system that: runs 24/7 may have multiple independent tasks to run at once may have tasks that require other tasks to run first lets tasks be scheduled by specific time, recurrence (ie. "run every 5 mins"), or interval (ie. "run from 2pm to 3pm") My first naive attempt at this was just a single PHP script scheduled to run every minute by cron (language was chosen in order to use a certain library, but no longer necessary). The logic behind when to run this or that portion of code got hairy pretty quick. So my question is how should I approach this from here? I'm not tied to any one language, though I'm partial to python/javascript. Thoughts: Could be done as a set of scripts that include a scheduling mechanism with one script per bit of logic...but the idea just feels wrong to me. Building it as a daemon could be helpful, but still unsure what to do about dozens of if-else statements for detecting the current time

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• Pulling in changes from a forked repo without a request on GitHub?

  - by Alec

  I'm new to the social coding community and don't know how to proceed properly in this situation: I've created a GitHub Repository a couple weeks ago. Someone forked the project and has made some small changes that have been on my to-do. I'm thrilled someone forked my project and took the time to add to it. I'd like to pull the changes into my own code, but have a couple of concerns. 1) I don't know how to pull in the changes via git from a forked repo. My understanding is that there is an easy way to merge the changes via a pull request, but it appears as though the forker has to issue that request? 2) Is it acceptable to pull in changes without a pull request? This relates to the first one. I'd put the code aside for a couple of weeks and come back to find that what I was going to work on next was done by someone else, and don't want to just copy their code without giving them credit in some way. Shouldn't there be a to pull the changes in even if they don't explicitly ask you to? What's the etiquette here I may be over thinking this, but thanks for your input in advance. I'm pretty new to the hacker community, but I want to do what I can to contribute!

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