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• Why can't I get a working session with vnc4server

  - by ysap

  We have a couple of (identical) Ubuntu 11.10 machines, configured with gnome-classic, which we use as remote servers, and let our clients log into personal user accounts we create for them using vnc4server. We configured all the machines in the same way, following a short manual we compiled, describing how to download, install and prepare a few tools and our software. The connection usually works fine, but today I set up a fresh machine, and experienced problems. After installing vnc4server, I ran vncpasswd and copied the following startup file to ~/.vnc/xstartup: #!/bin/sh unset SESSION_MANAGER unset DBUS_SESSION_BUS_ADDRESS gnome-session --session=gnome-classic & [ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup [ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources xsetroot -solid grey vncconfig -iconic & Then, I started vnc4server and used two viewers (the Ubuntu Remote Desktop Viewer and Windows RealVNC Client) in two other machines, but instead of getting my desktop, I see an empty window with a grey-ish background pattern like this: and the cursor is a bold X. What is wrong with the setup and why don't I get a remote session as expected?

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• HTTP 303 redirection and robots.txt

  - by Ian Dickinson

  On a site I'm working on, we're using the HTTP 303 redirect pattern (see this article for background) to distinguish between information and non-information resources. So: some URL's under /id get redirected to dynamically-created pages under /doc. These dynamic pages are built from a database, and contain links to other /doc/ resources, so in general we don't want them to be crawled. Our robots.txt contains: Disallow: /doc However, we do want the non-redirected pages under /id to get indexed by Google et al: Allow: /id So the question I have, which I can't find an answer to so far, is: if an allowed /id page 303-redirects to a /doc page, will it still be blocked by robots.txt? If yes, we're OK, but otherwise I'm going to disallow all /id resources in the robots file, as having the crawler hammer the db would be worse than losing search indexing for the /id pages.

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• New Procurement Report for Transportation Sourcing

  - by John Murphy

  Welcome to our fourth annual transportation procurement benchmark report. American Shipper, in partnership with the Council of Supply Chain Management Professionals (CSCMP) and the Retail Industry Leaders Association (RILA), surveyed roughly 275 transportation buyers and sellers on procurement practices, processes, technologies and results. Some key findings: • Manual, spreadsheet-based procurement processes remain the most prevalent among transportation buyers, with 42 percent of the total • Another 25 percent of respondents use a hybrid platform, which presumably means these buyers are using spreadsheets for at least one mode and/or geography • Only 23 percent of buyers are using a completely systems-based approach of some kind • Shippers were in a holding pattern with regards to investment in procurement systems the past year • Roughly three-quarters of survey respondents report that transportation spend has increased in 2012, although the pace has declined slightly from last year’s increases • Nearly every survey respondent purchases multiple modes of transportation • The number of respondents with plans to address technology to support the procurement process has increased in 2012. About one quarter of respondents who do not have a system report they have a budget for this investment in the next two years.

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• Sub Domain tracking with Analytics filters

  - by Nick

  Hi All, We currently have Analytics tracking codes running throughout our site including our Sub Domains. What I would like to do is create different Profiles under the same account segmenting the sub domains by means of filters. Currently I am just excluding the hostname of the main website by using the following custom filter: Exclude: Hostname Filter pattern: ^www.mydomain.co.za(.*) I know this isn't the proper method of doing this though and have some of the main domains links coming through in the data. Ideally I would just like to include anything from: sub.domain.co.za Any help would be greatly appreciated. Thanks

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• Is "watermarking" code with random trailing whitespace a good way to detect plagiarism?

  - by paperjam

  Consider this: int f(int x) { return 2 * x * x; } and this int squareAndDouble(int y) { return 2*y*y; } If you found these in independent bodies of code, you might give the two programmers the benefit of the doubt and assume they came up with more-or-less the same function independently. But look at the whitespace at the end of each line of code. Same pattern in both. Surely evidence of copying. On a larger piece of code, correlation of random whitespace at line ends would be irrefutable evidence of a shared origin. Now aside from the obvious weaknesses: e.g. visible or obvious in some editors, easily removed, I was wondering if it was worth deploying something like this in my open source project. My industry has a history of companies ripping off open source projects.

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• Is it OK to have a team with same abilities but different skill levels?

  - by A. Karimi

  I believe that in an ideal team, members should have different but complementary abilities. But is that true about software development teams? As an example we are a small team of 5. We almost have the same abilities and interests but with different levels of skills. Regarding such situation I think we don't cover our teammates' weaknesses. Is there any pattern to follow to manage and improve such team? Should I setup a team with different abilities and interests to maximize the performance and productivity? -- EDIT -- Our current team has a specific lifetime. We work together in a per-project manner. In another word we may change the team arrangement for each project depending on the project and developers situation. Actually we've provided a sort of floating situation. In short, we are a network of developers rather than a fixed-size development team.

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• How to install GIMP 2.7?

  - by Bucic

  Here I ask this question since Beta 2 is usable and this question would come up sooner then later ;) After issuing the standard sudo add-apt-repository ppa:matthaeus123/mrw-gimp-svn sudo apt-get update I get W: Failed to fetch http://ppa.launchpad.net/matthaeus123/mrw-gimp-svn/ubuntu/dists/precise/main/source/Sources 404 Not Found W: Failed to fetch http://ppa.launchpad.net/matthaeus123/mrw-gimp-svn/ubuntu/dists/precise/main/binary-amd64/Packages 404 Not Found W: Failed to fetch http://ppa.launchpad.net/matthaeus123/mrw-gimp-svn/ubuntu/dists /precise/main/binary-i386/Packages 404 Not Found E: Some index files failed to download. They have been ignored, or old ones used instead. Is there any way to get around this. Excluding compiling from source as it usually introduces even more multilevel errors.

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• sun.com - SMTP 521

  - by alexismp

  reason: 521 5.0.0 messages are no longer accepted for sun.com It's been planned for a while now - sun.com email addresses are no longer accepted and no longer forwarded to oracle.com. So check you contacts and update old Sun email addresses. While this will probably cut down the spam for a number of us you may need the new stable email address - most Oracle email addresses use the same first.last @ oracle.com pattern (but there are a few homonyms in a company with 100k+ employees). If you need to contact us (TheAquarium), the email address is in the "Contact Us" section on the blog.

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• JavaOne Content Catalog Live!

  - by programmarketingOTN

  The JavaOne Content Catalog—the central repository for information on sessions, demos, labs, user groups, exhibitors, and more for San Francisco 2012—is live!In the Content Catalog you can search on tracks, session types, session categories, keywords, and tags. Or, you can search for your favorite speakers to see what they’re presenting this year. And, directly from the catalog, you can share sessions you’re interested in with friends and colleagues through a broad array of social media channels.Start checking out JavaOne content now to plan your week at the conference. Then you’ll be ready to sign up for all of your sessions in mid-July when the scheduling tool goes live. Happy browsing! 

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• How to get rid of the background gradient of the inline GtkToolbar?

  - by Dima

  When you run the below code, it will show an inline toolbar in a window. Notice how the inline toolbar has a stand-out backbround. Is there a way to apply CSS to get rid of it and make blend with regular window color? #!/usr/bin/python3 from gi.repository import Gtk button_names = [Gtk.STOCK_ABOUT, Gtk.STOCK_ADD, Gtk.STOCK_REMOVE, Gtk.STOCK_QUIT] buttons = [Gtk.ToolButton.new_from_stock(name) for name in button_names] toolbar = Gtk.Toolbar() toolbar.set_show_arrow(False) for button in buttons: toolbar.insert(button, -1) style_context = toolbar.get_style_context() style_context.add_class(Gtk.STYLE_CLASS_INLINE_TOOLBAR) grid = Gtk.Grid() grid.add(toolbar) label = Gtk.Label() grid.add(label) window = Gtk.Window() window.set_size_request(200, 50) window.add(grid) window.connect('delete-event', Gtk.main_quit) window.show_all() Gtk.main()

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• Top 10 Oracle Solaris How To Articles

  - by Glynn Foster

  While generating new technical content for Oracle Solaris 11 is one of our higher priorities here at Oracle, it's always fun to have a look at some web stats to see what existing published content is popular among our audience. So here's the top ten as voted by your browsers. Interestingly it's a great mix of technologies. What's your favourite? Let us know! RankHow To Articles 1.Taking your first steps with Oracle Solaris 11 2.How to get started creating Zones on Oracle Solaris 11 3.How to script Oracle Solaris 11 Zone creation for a network in a box configuration 4.How to configure Oracle Solaris 11 using the sysconfig command 5.How to update Oracle Solaris 11 systems using Support Repository Updates 6.How to perform system archival and recovery with Oracle Solaris 11 7.Introducing the basics of IPS on Oracle Solaris 11 8.How to update to Oracle Solaris 11.1 using IPS 9.How to set up Automated Installer services on Oracle Solaris 11 10.How to live install from Oracle Solaris 10 to Oracle Solaris 11 11/11

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• Will these type of 403 errors affect my ranking?

  - by Gkhan14

  Let's say I have a directory that has a 403 forbidden error for all of the content in it, however a few of the images in the subdirectoies of the main diretory do NOT have a 403 forbidden error. Will this fact affect my ranking? For example: test.com/system/ (HAS 403 ERROR FOR ALL FILES) - test.com/system/pie/ (HAS 403 ERROR FOR ALL FILES) - test.com/system/pie/image.png (DOES NOT HAVE A 403 ERROR, AND THIS IMAGE IS EMBEDED ON A PAGE ON test.com e.g(test.com/pie/)) This sort of pattern repeats for about 10 different images. This directory is like a secret "system", however all of the content on the main site (test.com) is still accessible to everyone from the public.

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• C# WebForms and Ninject

  - by ipohfly

  I'm re-working on the design of an existing application which is build using WebForms. Currently the plan is to work it into a MVP pattern application while using Ninject as the IoC container. The reason for Ninject to be there is that the boss had wanted a certain flexibility within the system so that we can build in different flavor of business logic in the model and let the programmer to choose which to use based on the client request, either via XML configuration or database setting. I know that Ninject have no need for XML configuration, however I'm confused on how it can help to dynamically inject the dependency into the system? Imagine I have a interface IMember and I need to bind this interface to the class decided by a xml or database configuration at the launch of the application, how can I achieve that?

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• How to implement soft edge areas with particles

  - by OpherV

  My game is created using Phaser, but the question itself is engine-agnostic. In my game I have several environments, essentially polygonal areas that player characters can move into and be affected by. For example ice, fire, poison etc' The graphic element of these areas is the color filled polygon area itself, and particles of the suitable type (in this example ice shards). This is how I'm currently implementing this - with a polygon mask covering a tilesprite with the particle pattern: The hard edge looks bad. I'd like to improve by doing two things: 1. Making the polygon fill area to have a soft edge, and blend into the background. 2. Have some of the shards go out of the polygon area, so that they are not cut in the middle and the area doesn't have a straight line for example (mockup): I think 1 can be achieved with blurring the polygon, but I'm not sure how to go about with 2. How would you go about implementing this?

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• Standard -server to server- and -browser to server- authentication method

  - by jeruki

  I have server with some resources; until now all these resources were requested through a browser by a human user, and the authentication was made with an username/password method, that generates a cookie with a token (to have the session open for some time). Right now the system requires that other servers make GET requests to this resource server but they have to authenticate to get them. We have been using a list of authorized IPs but having two authentication methods makes the code more complex. My questions are: Is there any standard method or pattern to authenticate human users and servers using the same code? If there is not, are the methods I'm using now the right ones or is there a better / more standard way to accomplish what I need? Thanks in advance for any suggestion.

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• Simpler alternative to AngelScript

  - by Vee

  I want to give players the ability to create and share bullet patterns for a shoot'em up. The pattern scripts should have all the common programming stuff like loops, if/else, variables, and so on. But in the end, I just want them to call a "spawn bullet at X, Y with Z angle and A speed" in the C++ game. To spawn a circle of bullets, the user should only have to write a script with a for loop that goes from 0 to 360 and calls the spawn bullet function on every iteration. I tried integrating AngelScript, but I am getting nowhere - it looks way to complex for a simple task like this one. Is there an easy to integrate library that can solve my problem? Thanks.

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• Can you recommend a good tutorial on building custom package versions?

  - by Ivan

  After installing Ubuntu 11.04 I was disappointed by the fact there are still Scala 2.7 (when 2.8 is long ago current actual branch) and Mono 2.6 (when pretty a time has passed after 2.8 release). I am not sure I could build all the packages for Mono myself, but I'd like to try making my own custom version of Scala package (and I want my system to accept it not as a different package but a version of the original, so that if I put it into a configured repository, the system will automatically upgrade to it from currently installed original 2.7). Can you recommend a good tutorial on this subject (Ubuntu deb packages building and hacking for beginners)?

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• Cannot Update through Manager or Terminal/ Software Center Does Not Work

  - by BROBA

  I installed Tor a few days ago via the terminal. I deleted some hashtags in the gedit polipo, and changed my proxy settings in chrome, but was unable to make it work and have since changed all of it back. I then downloaded the Tor browser bundle which works great, but ever since then have been unable to download updates or new software. The update manager says to "check internet connection" and the software center displays a mostly blank screen under apps like "rhythmbox" and just says "available from main source" when I click on "use this source" a refresh symbol appears on the upper right corner of the software center for a split second, and then nothing happens. The app does not download and isn't available in the dash. When I try via the terminal it says it's unable to connect to my ip address. I tried changing the server and unchecking all the repository options for software sources, all to no avail. WHAT DID I DO?????

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• Oversizing images to produce better looking pages?

  - by Joannes Vermorel

  In the past, improper image resizing used to be a big no-no of web design (not mentioning improper compression format). Hence, for years I have been sticking to the policy where images (PNG or JPG) are resized on the server to match the resolution pixel-wise they will have with the rendered page. Now, recently, I hastily designed a HTML draft with oversized images, using inline CSS style such as width:123px and height:123px to resize the images. To my (slight) surprise, the page turned out to look much better that way. Indeed, with better screen resolution, some people (like me), tend to browse with some level of zoom (aka 125% or even 150% zoom), otherwise fonts are just too small on-screen. Then, if the image is strictly sized, the enlarged image appears blurry (pixel interpolation effect), but if the image is oversized the results is much better. Obviously, oversizing images is not an acceptable pattern if your website is intended for mobile browsing, but is there case where it would be considered as acceptable? Especially if the extra page weight is small anyway.

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• What is it going here in my solution?

  - by bbb

  I am a asp.net mvc programmer and if I want to start a project I do this: I make a class library named Model for my models. I make a class library named Infrastructure.Repository for database processes I make a class library named Application for business logic layer And finally I make a MVC project for the UI. But now some things are confusing me. Am I using 3-tier programming? If yes so what is n-tier programming and which one is better? If no so what is 3-tier programming? Some where I see that the tiers namings are DAL and BIZ. Which one is correct according to the naming convention?

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• Drawing different per-pixel data on the screen

  - by Amir Eldor

  I want to draw different per-pixel data on the screen, where each pixel has a specific value according to my needs. An example may be a random noise pattern where each pixel is randomly generated. I'm not sure what is the correct and fastest way to do this. Locking a texture/surface and manipulating the raw pixel data? How is this done in modern graphics programming? I'm currently trying to do this in Pygame but realized I will face the same problem if I go for C/SDL or OpenGL/DirectX.

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• MVC .Net, WebMatrix talk presentations and webinars

  - by subodhnpushpak

  I presented sessions on MVC .Net and webmatrix. I covered stuff like what’s new in MVC .net and the architecture goodness of MVC pattern. I also demonstrated how MVC 3 / MVC 4 harness HTML 5 / mobile along with Jquery and Modernizr.  PHP coding using MVC and Webmatrix and other advanced stuff like hosting PHP on windows or porting MYSQL Db to MSSQL is also is also part of the demo in the sessions. The slide decks are available at below link and all the demo is recorded and also shared at below link.   WebMatrix View more presentations from Subodh Pushpak.   WebMatrix2 View more presentations from Subodh Pushpak.   The recordings / Demo can be accessed at and If you have any suggestions / ideas / comments; please do post.

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• ASP.NET 4.0 and the Entity Framework 4 - Part 4 - A 3 Layered Approach to the Entity Framework

  In this article, Vince suggests a pattern to use when developing a three layered application using the Entity Framework 4. After providing a short introduction he demonstrates the creation of the database, data access layer, business logic layer, and a web form. He does so with the help of detailed explanations, source code examples and related screenshots. He also examines how to select records to load a Drop Down List, including adding, editing and deleting records.Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Android application Database Framework

  - by Marek Sebera

  When creating mobile (specially Android) application, I usually come to touch with similar pattern of working with data. Usually I need to fetch some remote data (covered by authorization process) to local cache. And on next request: Check networking Check presence of cache file Check version of cache file (if networking) Get new version and save cache (if networking and file not in cache, or outdated) Data store is no-SQL JSON Document-Based (and yes, I know about CouchDB Android version, but it doesn't fit my needs yet.) Process of authorizing to data source and code for check version of local cache is adapted to application. But the other code (handling network, saving cache, handling exceptions,...) is always the same. Is there any Data Store helper I can use, which provides functions I described above?

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• Hello NHibernate! Quickstart with NHibernate (Part 1)

  - by BobPalmer

  When I first learned NHibernate, I could best describe the experience as less of a learning curve and more like a learning cliff.  A large part of that was the availability of tutorials.  In this first of a series of articles, I will be taking a crack at providing people new to NHibernate the information they need to quickly ramp up with NHibernate. For the first article, I've decided to address the gap of just giving folks enough code to get started.  No UI, no fluff - just enough to connect to a database and do some basic CRUD operations.  In future articles, I will discuss a repository pattern for NHibernate, parent-child relationships, and other more advanced topics. You can find the entire article via this Google Docs link: http://docs.google.com/Doc?docid=0AUP-rKyyUMKhZGczejdxeHZfOGMydHNqdGc0&hl=en Enjoy! -Bob

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