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• What are the basic skills a beginner JavaScript programmer should have?

  - by Sanford

  In NYC, we are working on creating a collaborative community programming environment and trying to segment out software engineers into differing buckets. At present, we are trying to define: Beginners Intermediates Advanced Experts (and/or Masters) Similar to an apprenticeship, you would need to demonstrate specific skills to achieve different levels. Right now, we have identified beginner programming skills as: Object - method, attributes, inheritance Variable - math, string, array, boolean - all are objects Basic arithmetic functions - precedence of functions String manipulation Looping - flow control Conditionals - boolean algebra This is a first attempt, and it is a challenge since we know the natural tension between programming and software engineering. How would you create such a skills-based ranking for JavaScript in this manner? For example, what would be the beginner JavaScript skills that you would need to have to advance to the intermediate training? And so on.

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• How to extend a Linux PV partition online after virtual disk growth

  - by Yves Martin

  VMware allows to extend the size of a virtual disk online - when the VM is running. The next expected steps for Linux system are: extend the partition: delete and create a larger one with fdisk extend the PV size with pvresize use free extents for lvresize operations and then resize2fs for file system But I am stuck on the first step: fdisk and sfdisk still display the old size for the disk. My disk is a SCSI virtual disk connected thanks to the virtual LSI Logic controller. How to refresh the virtual disk size and partition table information available in Linux kernel without reboot ? As far as I know all that steps are possible for a running Windows, without reboot and even without any user actions thanks to VMWare tools. On Linux, I expects to do all steps online too and I already know steps 2, 3 and 4 work online. But the first one - change partition size declared in the partition table (still) seems to require a reboot. Update: My system is a Debian Lenny with kernel 2.6.26 and the disk I have extended is the main disk with a large PV containing the "root" LV for "/".

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• Open Source Shopping Cart Software

  - by Cecil

  Ive come into a bit of an issue lately regarding shopping cart software, and i would like some recommendations. I have been an OsCommerce developer for years now, and im finding alot of my clients are wanting updated looking backends ... OSC is fantastic, but the fact that its not being updated anymore and that its clunky and table based is taking up quite a bit of my time. I have built a few sites on Magento, and although it gives quite a good backend, it is the slowest shopping cart i have ever come across in my time, that and the fact that modifying it takes years, has convinced me not to use that again. So, i like any input as to what people are finding good in todays open source shopping cart software.

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• Potential issues with multiple home pages

  - by Maxim Zaslavsky

  I have a site where I want to have two different home pages: a general description page for anonymous users, and a dashboard page for logged-in users. I am debating between two implementations: Both pages live at / The page for anonymous users is located at / and the dashboard is at /dashboard, with automatic redirection between them based on whether a given user is logged in (e.g., if you're logged in and navigate to /, you are redirected to /dashboard. Is it cleaner to have both pages use the same URL or separate URLs? Also, I imagine that choices for that question will affect the following: Caching: the anonymous page would be completely cached, while the logged-in page would not be cached at all (except for static resources). This could lead to issues with server caching, request speed, and UX (such as if one version of the page is cached in a user's browser when the other version should be displayed, instead). SEO: how would search engines react to such canonical URLs? Load time (due to redirects or to the server having to always reevaluate which page to display)

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• An alternative way to request read reciepts

  - by lavanyadeepak

  An alternative way to request read reciepts Sometime or other we use messaging namespaces like System.Net.Mail or System.Web.Mail to send emails from our applications. When we would need to include headers to request delivery or return reciepts (often called as Message Disposition Notifications) we lock ourselves to the limitation that not all email servers/email clients can satisfy this. We can enhance this border a little now, thanks to a new innovation I discovered from Gawab. It embeds a small invisible image of 1x1 dimension and the image source reads as recieptimg.php?id=2323425324. When this image is requested by the web browser or email client, the serverside handler does a smart mapping based on the ID to indicate that the message was read. We call them as 'Web Bugs'. But wait it is not a fool proof solution since spammers misuse this technique to confirm activeness of an email address and most of the email clients suppress inline images for security reasons. I just thought anyway would share this observation for the benefit of others.

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• Help migrating from VB style programming to OO programming [closed]

  - by Agent47DarkSoul

  Being a hobbyist Java developer, I quickly took on with OO programming and understood its advantages over procedural code from C, that I did in college. But I couldn't grasp VB event based code (weird, right?). Bottom-line is OOP came natural to me. Curently I work in a small development firm developing C# applications. My peers here are a bit attached to VB style programming. Most of the C# code written is VB6 event handling code in C#'s skin. I tried explaining to them OOP with its advantages but it wasn't clear to them, maybe because I have never been much of a VB programmer. So can anybody provide any resources: books, web articles on how to migrate from VB style to OO style programming ?

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• Because of over incumbent patents, is it possible to safely develop any software without the risk of legal action?

  - by Chris Barry

  Take this System and method for restricting user access rights on the internet based on rating information stored in a relational database There are hundreds of thousands of them out there. So basically you can't program anything really without breaching one of thousands of software patents. If your program succeeds you will be sued by someone! Does this happen all the time and people get silenced? Do trendy startups get hit by things like this? Surely all major web properties would have been hit by the example above by AT&T?

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• 2d Ice movement

  - by Jeremy Clarkson

  I am building an top-down 2d RPG like zelda. I have been trying to implement ice sliding. I have a tile with the slide property. I thought it would be easy to get working. I figured that I would read the slide property, and move the character forward until the slide property no longer exists. So I tried a loop but all it did was stop at the first tile in an infinite loop. I then took the loop out and tried taking direct control of the character to move him along the slide path but I couldn't get it to move. Is there an easy way to do an ice sliding tile based movement in libgdx. I looked for a tutorial but none exist.

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• Google displaying swf menu in SiteLinks

  - by m90

  I have a website that uses a Flash based menu as its main navigation. A plain HTML fallback version is "lying underneath", the swf is embedded using swfobject. swfobject.embedSWF('MENU.swf', 'menu', '1000', '600', '8.0.0', 'ext/expressInstall.swf', {}, {wmode:'transparent',bgcolor:'#666666'}, {}); Somehow Google now started displaying a link to the swf-file in the SiteLinks (noting [SWF] beforehand) which is pretty ugly as the Flash content gets all scrambled and all you see is a random string of characters and numbers (it looks "hacked" to me, although I do know it is not). Also, the link to the swf is plain useless as it relies on JavaScript-functions in the HTML-document. I already demoted the swf in the Webmaster Tools, yet in some situations the link will still show up. Is anyone aware of this problem (I haven't found too much on this on the Internet) and knows how I can keep the search results from linking to the swf?

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• Grapeshot crawler ignoring robots.txt

  - by QF_Developer

  Has anyone come across a crawler called Grapeshot? They are hammering the same page repeatedly on our website. I believe they are looking for ad related keywords, based on previous content ad campaigns. The odd thing is we never ran any such campaigns on the page they are so interested in. We do have only a few pages running AdSense, is this what has attracted Grapeshot? I've added the following declaration to my robots.txt, but they don't seem to be honouring it? User-agent: grapeshot Disallow: / Any ideas on how to block this nuisance crawler? I'm starting to think the best way is by setting up IP rules in IIS?

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• Why should I use Bower? [closed]

  - by Wil

  I can fully appreciate the benefits of a package manager like Python PIP, Node npm, or Ruby Gems since they're doing much more than adding files to your applications path. Maybe I'm missing the point, or I'm being obtuse, but here are the negatives I can see: Separate step when building a project Separate dependency to install via another package manager (yo dawg) More clutter in the projects root with bower.json and / or .bowerrc Reliance on the registry being up to date, correct, and available Some imports / references to things like images won't work The positives I can see are these: I don't have to download the dependencies manually Optionally install packages as part of scaffolding based on user prompts or the like I'd really like to know of any benefits I'm unaware of, and I should say I'm not trying to be provocative I genuinely want to know.

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• Objected oriented approach to structure inside structure

  - by RishiD

  This is for C++ but should apply to any OO language. Trying to figure out the correct object oriented apporach to do the following (this is what I do in C). struct Container { enum type; union { TypeA a; TypeB b; }; } The type field determines if it TypeA or TypeB object. I am using this to handle responses coming back from a connection, they get parsed and get put into this structure and then based on the message type the appropriate fields get filled in. e.g. struct Container parseResponse(bufferIn, bufferLength); Is there an OO approach for doing this?

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• Ogre3D : seeking advices about game files management

  - by Tibor

  I'm working on a new game, and its related level editor, based on Ogre3D. I was thinking about how i could manage the game files, knowing that Ogre use .mesh files for models, .material for materials/texture information etc... . At first i thought about a common .zip folder decompressed at runtime (the same way Torchlight and Ogre samples do). But this way the game assets become a monolithic archive, loading takes time, and could be difficult to eventually patch them. So, let's say i have a game object named "Cube" i want to load in my program. Going for modularity, what if i create a compressed file (using zlib compression routines) named Cube.extname, containing its sub-files Cube.mesh, Cube.material and so on ? Are there any alternatives or should i stick with compressed objects? PS: Just to clear things, the answer is unrelated to my program code, at the moment i'm using "resources.cfg" pointing to the OgreSDK media directory.

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• NGINX Configuration Error using Codex Example: Is This a Typo in Codex?

  - by jw60660

  I installed NGINX using this tutorial: C3M Digital NGINX Tuturial but after reading this article on security issues with "cut and paste" configuration tutorials: Neal Poole's article regarding security and NGINX configuration I decided to follow Poole's suggestion to use the configuration suggested in the WordPress codex: Codex on NGINX Configuration I used the Codex configuration for a multisite installation using W3 Total Cache. When attempting to start NGINX I get an error saying that the /etc/nginx/nginx.conf test failed. The error message was: "Restarting nginx: nginx: [emerg] unknown directive "//" in /etc/nginx/sites-enabled/teambrazil.com:18" When I looked at my site specific configuration at that path I noticed the rewrite rule in the server block was: rewrite ^ $scheme://teambrazil.conf$request_uri redirect; That line in the Codex example was: rewrite ^ $scheme://mysite.conf$request_uri redirect; That looked like a mistake to me, and I changed my line to: rewrite ^ $scheme://teambrazil.com$request_uri redirect; I then attempted to restart NGINX but got the same error message. My question is: is that a mistake, and is there anything more I have to do aside from restarting NGINX after making this change. As suggested by both tutorials I set up the directories: /etc/nginx/sites-enabled and /etc/nginx/sites-available and created the appropriate symbolic links using: touch /etc/nginx/sites-available/teambrazil.com ln -s /etc/nginx/sites-available/teambrazil.com /etc/nginx/sites-enabled/teambrazil.com Is there something else I need to consider after making this correction? Or was it not an error in the first place? I'm pretty stuck here. BTW, I am using Debian squeeze as an OS on Amerinoc's VPS. I'm just getting familiar with VPS administration and am pretty much a noob. Thanks very much, would appreciate any input.

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• OpenVPN is installed but it is not an avaliable option in the network manager

  - by Relik

  I have installed and used openVPN once before in a previous install of Ubuntu 12.04. I have since reformatted, and now after reinstalling openVPN it will not show up in the network manager. I am trying to setup my VPN connection and the only option I have to choose from is PPTP. EDIT: I have Gnome Shell and KDE installed as well, Gnome being my primary. I cannot find OpenVPN in either Gnome or Unity, however I can add it without an issue in KDE. Not really an acceptable workaround, but it works for now. I would still like to be able to do it in GTK based desktops as well.

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• Issues with the intended behavior of a Service layer?

  - by Rafael Cichocki

  This analysis makes sense, and states anything that avoids code duplication and simplifies maintenance speaks for a service layer. What is the technical behavior? When a service client references a service, does it do so at runtime, or does it happen at compile time? When I change something in the service layer code, will this change be automatically taken into account in all it's clients, or do they need to be individually recompiled? How does this make sense from a testing point of view - I have working code, based on some code from a service, but if that service changes, my code might break?!

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• MAAS/Juju architecture and issues

  - by Massimo

  I recently deployed a MAAS/Juju environment based on a six nodes cluster, using Ubuntu 12.04 LTS, to run a "proof of concept". I could appreciate how interesting the architecture is, and I'd like to understand if I can really base my future business on this technology. Therefore I'd like to understand more about any involved limitations, constraints and necessities. In particular I'd like to understand: 1) how can MAAS be made reliable, i.e. deployed over two or more physical nodes able to fail-over ? 2) can the same physical cluster host multiple juju environments, under the assumption openstack/virtualization is not used ? 3) can the same physical node host different charms of the same juju environment, deployed in a standard, reliable way by juju ?

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• How come verification does not include actual testing?

  - by user970696

  Having read a lot about this topic, I still did not get it. Verification should prove that you are building the product right, while validation you build the right product. But only static techniques are mentioned as being verification methods (code reviews, requirements checks...). But how can you say if its implemented correctly if you do not test it? It is said that verification checks e.g. code for its correctnes. Verification - ensure that the product meet specified requirements. Again, if the function is specified to work somehow, only by testing I can say that it does. Could anyone explain this to me please? EDIT: As Wiki says: Verification:Preparing of the test cases (based on the analysis of the requireemnts) Validation: Running of the test cases

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• Large resolution differences

  - by Robin Betka

  I want to develop a game on multiple devices such as PC, Android or IOS. Want it to be in 1080p, but that means a massive scale down for the smartphones. I know how to do that, just render everything on a 1080p rendertarget and then render it on the screen smaller. But what should I do so that the scalling down doesn't look bad and blury? I can't do it vector based or anything because the sprites simply need a specific size. Should I make the sprites power of two size to get some nice mipmapping? And which other settings can I do? Or should I rather go with a lower resolution but then having a little bit worse look PC version? The performance seems not to be a problem for me, so would be sad not using 1080p because of other problems.

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• Canonical links for huge websites

  - by Florin

  Let's say I have 5 products that are identical but the product code, the product color specifications and the product image. The title, meta and description are identical (by the way the color is in a select form). I made 4 products link canonical to the 1 that is the master based on many factors. If the master becomes inactive or without a stock one product from the other 4 will become the new master and the rest will become canonical to it. The question is if that by becomeing master from canonical will the site suffer a penalty from Google or it will work just fine? What will Google think about this strategy?

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• First Windows Phone 7 &ndash; Mobile LOB App.

  - by Richard Jones

  So I spent a couple of hours yesterday building my first Windows 7 Phone Series. application.   I still can’t get used to saying Windows 7 Phone Series.   So I think I’ll just go with WP7.   I must say I’m really impressed.    Calling web-services a breeze laying out User Interface a very straight forward.   I had made called into Dynamics NAV using web-services in under 10 minutes. Working in XAML takes a bit of getting used to,  I’m not trying to-do anything too clever yet. One thing I will point out to transition from one XAML page to the next use this.NavigationService.Navigate(new Uri("/Primary.xaml", UriKind.Relative)); Going from Compact Framework this is equivalent of a Window.Show Its so nice to be able to talk nicely again, about Windows Based Mobile Development!

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• What is the best idea to put available OS (linux) and Web application to client?

  - by Fernando Costa

  After a year programming a web based business management system, I got my idea divided into two differents ways to do what I'm doing... I will try to explain in follow lines: First I will describe my enviroment: Webserver: apache, ngynx Programming Language: PHP, Shell Script, Java Script, SQL Database: Mysql Operating System: Linux, UNIX (All Distros) (If manually configured works on windows) Authentication Server: FreeRadius First situation I have my application running on this enviroment that I had just described before, as my application is a SaaS app, then I have my own server to run it all and customers pay to use it as a service accessed by webbrowser. Second Situation The same as before but with one big difference, everything (environment) is installed in the customer, then I need to cryptography all my codes (It includes PHP and Shell Scripts). I think this situation is most difficulty, but I would like to hear it from different points of view.

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• How can I delay dropbox from starting, but not disable it?

  - by jgbelacqua

  When I log into my user account on Ubuntu 10.10, there is a unsatisfying delay before my system becomes usable. Even launching a terminal, I have to wait a few seconds before the bash prompt appears. During this start-up period, the top process seems to be dropbox. I'm not sure what it's doing exactly (functionality is still fine as far as I can see), but I do know it really doesn't need to be doing it while I'm waiting for desktop to appear. (This is the standard Ubuntu with Gnome desktop, by the way.) What I would like to do is to be able to have a static or even dependency-based delay for dropbox to start. It would be nice if it waited for, e.g., 10 minutes, or for my browser tabs to load and a typing pause. Then it could churn away on file status or cache-chewing, and I would be happy. Is there a way to do this? Thanks!

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• Where can I find a good Hibernate Criteria tutorial that doesn't use cats and kittens? [closed]

  - by cbmeeks

  I've been using Hibernate a little while (HQL) and want to try Criteria's for a few scenarios we have here. I'm trying to get a few inner joins (2 layers deep) and am struggling a little. I go to the official site and they teach by cats and kittens. I don't care about cats and kittens and find the analogy hard to follow. Orders, details, shipments, etc. Nice, boring business references is what I enjoy. I tried to Google it but all I get are early 2000's websites with so many flashing GIF's, cluttered displays, flash overs and "tummy tuck" ads I want to puke. Why can't the java world have sites like http://guides.rubyonrails.org/? And no, I'm not advocating I volunteer to create a similar site. :-) Anyway, any good site that can give a nice tutorial on Criteria based searches would be appreciated.

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• How should I design a wizard for generating requirements and documentation

  - by user1777663

  I'm currently working in an industry where extensive documentation is required, but the apps I'm writing are all pretty much cookie cutter at a high level. What I'd like to do is build an app that asks a series of questions regarding business rules and marketing requirements to generate a requirements spec. For example, there might be a question set that asks "Does the user need to enter their age?" and a follow-up question of "What is the minimum age requirement?" If the inputs are "yes" and "18", then this app will generate requirements that look something like this: "The registration form shall include an age selector" "The registration form shall throw an error if the selected age is less than 18" Later on down the line, I'd like to extend this to do additional things like generate test cases and even code, but the idea is the same: generate some output based on rules determined by answering a set of questions. Are there any patterns I could research to better design the architecture of such an application? Is this something that I should be modeling as a finite state machine?

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