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• System broken after installing Gtk+-3.4.1 with broadway backend enabled

  - by Roman D. Boiko

  I am running Ubuntu 11.10 from VirtualBox. I installed Gtk+ 3.4.1 (latest stable release) from sources with X11 and broadway backends enabled. In order to do that, I also installed latest versions of glib, libffi, libtiff, libjped, gdk-pixbuf, and pango. Each of them was configured with default options. I.e., they were installed to /usr/local (at least, I see respective folders in /usr/local/include). After reboot and login (regardless which user), desktop is grey for about 30 sec, nothing is displayed. Then Nautilus starts, but nothing else (my locale is Ukrainian, but there is nothing important in text): . During boot, I can access command prompt as root, use dpkg, etc. But I don't know what to do. One idea is to reinstall Gtk+ and other libraries with prefix /usr or /usr/shared. I will try that, but it is quite time-consuming, so any ideas would be welcome. Reverting to earlier snapshot is still possible, but it is 6 days old and I would like to try to solve the problem.

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• How do I copy a package from Debian to my PPA?

  - by Bernhard Reiter

  I'd like to add the latest gourmet package from Debian sid to our team's PPA so Ubuntu users who would like to run an up-to-date version of Gourmet can add that PPA to their software sources. (Dependency-wise, that shouldn't be much of an issue as pretty much all our current dependencies are already available in all currently supported Ubuntu versions.) I've downloaded the *.dsc file and debian and orig tarballs, and even figured out I could use this for the package's source.changes file. I also downloaded the Debian maintainer's public key so dput can validate the package. I then tried to upload the package to our PPA using dput ppa:~gourmet/ppa gourmet_0.17.3-1_source.changes (I also tried without the tilda.) This seemed to succeed, but I didn't get a confirmation email, and no packages are now displayed at our PPA, which leads me to believe that the package was rejected because the Debian maintainer's key is obviously not among our team members' keys. So what's the easiest way to "copy" a package from Debian (sid) to a Launchpad PPA? Do I really need to rebuild the entire package locally before I can upload it?

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• Cannot enable Additional drivers for Broadcom in 12.10

  - by Compt

  tl;dr version: Additional Drivers does not work for enabling a driver in Ubuntu 12.10, however it worked in 12.04. I upgraded to Ubuntu 12.10 from 12.04 via a live USB. I did a fresh install to avoid any conflicts. From 12.04 I know that my wireless card has proprietary drivers that could be installed via Additional Drivers. I did eventually find additional drivers in the software sources menu, however when I attempt to switch to Broadcom 802.11 Linux STA wireless driver source from bcmwl-kernel-source, it not only does not work, it in fact disables my wireless completely. The only way to revert this is to restart, and revert back to "do not use the device". Then upon another restart, my wireless will function once again. I was curious if anyone else had this issue, and if there was a fix for it as of yet. I looked on launchpad and it may be a potential bug, but I am unsure. Any help would be greatly appreciated (and sorry for that wall of text). Until then, I'll continue to use my wireless as it is (or revert to 12.04), but I do notice a slower connection without it enabled.

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• Master Data Management – A Foundation for Big Data Analysis

  - by Manouj Tahiliani

  While Master Data Management has crossed the proverbial chasm and is on its way to becoming mainstream, businesses are being hammered by a new megatrend called Big Data. Big Data is characterized by massive volumes, its high frequency, the variety of less structured data sources such as email, sensors, smart meters, social networks, and Weblogs, and the need to analyze vast amounts of data to determine value to improve upon management decisions. Businesses that have embraced MDM to get a single, enriched and unified view of Master data by resolving semantic discrepancies and augmenting the explicit master data information from within the enterprise with implicit data from outside the enterprise like social profiles will have a leg up in embracing Big Data solutions. This is especially true for large and medium-sized businesses in industries like Retail, Communications, Financial Services, etc that would find it very challenging to get comprehensive analytical coverage and derive long-term success without resolving the limitations of the heterogeneous topology that leads to disparate, fragmented and incomplete master data. For analytical success from Big Data or in other words ROI from Big Data Investments, businesses need to acquire, organize and analyze the deluge of data to make better decisions. There will need to be a coexistence of structured and unstructured data and to maintain a tight link between the two to extract maximum insights. MDM is the catalyst that helps maintain that tight linkage by providing an understanding about the identity, characteristics of Persons, Companies, Products, Suppliers, etc. associated with the Big Data and thereby help accelerate ROI. In my next post I will discuss about patterns for co-existing Big Data Solutions and MDM. Feel free to provide comments and thoughts on above as well as Integration or Architectural patterns.

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• How to hide the mouse cursor

  - by MvG

  I'm building a kiosk using Ubuntu Precise on a touch screen. Now I'm looking for the appropriate way to make the mouse cursor disappear. As people know where they are pointing, displaying an arrow under their finger is useless, and having an error where they last pointed even more so. My best bet would be some kind of cursor theme consisting only of transparent cursors. I'm a bit surprised to find no UI to switch and maybe install cursor themes the default Unity UI, but as I won't be using Unity, that's not much of a problem. It appears that the alternatives listed in update-alternatives --list x-cursor-theme all refer to .theme files, so I searched the package list for those. The resulting list does not list any likely candidates, i.e. no packages containing “invisible” or “transparent” in their name. So far, some googled result yielding a readme for “XCursor Transparent Theme” is my best bet. That would mean compiling those sources myself, perhaps putting them into my PPA. I'm also a bit sceptical about that result as said readme is dated from 2003. And I'm not sure that I'm not making things overly complicated. After all, there is quite some support in Precise for touch devices, so I don't believe I'm the first one who wants to get rid of his mouse cursor. Is there another way which doesn't involve user-compiled binary code? Is there a theme package for transparent cursors which I've overlooked? Is there some other mechanism to make the cursor disappear without changing the cursor theme? I'll be using Matchbox WM, Firefox and Java applets, so I'll be happy with any solution working under such a setup. I'm not interested in any solutions twiddling with Gnome or Compiz, as I'll not be running either.

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• How do I source a shell script for Node Version Manager?

  - by Matthew Patrick Cashatt

  Hi and thanks for looking! I am new to Linux/Ubuntu, but I have set up an Ubuntu box on which to run Node.js. I have had moderate success, but now I need to be able to easily upgrade my version of Node. Many folks recommend using Node Version Manager. I followed the directions, but when I try to do something like this: nvm ls I get a messaging stating that No command NVM found I have gone back to check the steps I followed to install NVM, but there is one part that is tricky for may and I think to be the culprit: sourcing the file for bash. From the instructions: To activate nvm, you need to source it from your bash shell . ~/nvm/nvm.sh I always add this line to my ~/.bashrc or ~/.profile file to have it automatically sources upon login. Often I also put in a line to use a specific version of node. So which file should I add this to? I am guessing profile since it's ubuntu?? Also, where in the file do I add this line? After I have added this line, do I need to reboot or anything? Any help would be deeply appreciated--especially if you can show me an example profile file with . ~/nvm/nvm.sh integrated so that I can see usage. Thanks, Matt

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• ArchBeat Link-o-Rama for October 18, 2013

  - by OTN ArchBeat

  Enriching XMLType data using relational data – XQuery and fn:collection in action | Lucas Jellema Another detailed technical post from the always prolific Lucas Jellema. Evil Behind ChangeEventPolicy PPR in CRUD ADF 12c and WebLogic Stuck Threads | Andrejus Baranovskis The latest post from Oracle ACE Director Andrejus Baranovskis is a bit of a preview of his presentation at the upcoming UKOUG 2013 event. Podcast: Interview with authors of "Hudson Continuous Integration in Practice" For your listening pleasure... Here's an Oracle Author Podcast Interview with "Hudson Continuous Integration in Practice" authors Ed Burns and Winston Prakash. Manual Recovery Mechanisms in SOA Suite and AIA | Shreenidhi Raghuram Solution architect Shreenidhi Raghuram's post combines information from several sources to provide "a quick reference for Manual Recovery of Faults within the SOA and AIA contexts." Event: Harnessing Oracle Weblogic and Oracle Coherence This OTN Virtual Developer Day event features eight sessions in two tracks, with presentations and hands-on labs for developers and architects delivered by experts in Weblogic, Coherence, and ADF. Registration is free. November 5th, 2013. 9am-1pm PT / 12pm-4pm ET / 1pm-5pm BRT Podcast: IoT Challenges and Opportunities - Part 2 Part 2 of the OTN ArchBeat Internet of Things podcast features a roundtable discussion of IoT challenges: massive data streams, security and privacy issues, evolving standards and protocols. Listen! Video: Design - ADF Architectural Patterns - Two for One Deal | Chris Muir Chris Muir explores the reuse of BTF workspaces across multiple applications and the advantages and disadvantages of reuse at the application level. Thought for the Day "Can't nothing make your life work if you ain't the architect." — Terry McMillan, American author (Born October 18, 1951) Source: brainyquote.com

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• Hidden Gems: Accelerating Oracle Data Integrator with SOA, Groovy, SDK, and XML

  - by Alex Kotopoulis

  On the last day of Oracle OpenWorld, we had a final advanced session on getting the most out of Oracle Data Integrator through the use of various advanced techniques. The primary way to improve your ODI processes is to choose the optimal knowledge modules for your load and take advantage of the optimized tools of your database, such as OracleDataPump and similar mechanisms in other databases. Knowledge modules also allow you to customize tasks, allowing you to codify best practices that are consistently applied by all integration developers. ODI SDK is another very powerful means to automate and speed up your integration development process. This allows you to automate Life Cycle Management, code comparison, repetitive code generation and change of your integration projects. The SDK is easily accessible through Java or scripting languages such as Groovy and Jython. Finally, all Oracle Data Integration products provide services that can be integrated into a larger Service Oriented Architecture. This moved data integration from an isolated environment into an agile part of a larger business process environment. All Oracle data integration products can play a part in thisracle GoldenGate can integrate into business event streams by processing JMS queues or publishing new events based on database transactions. Oracle GoldenGate can integrate into business event streams by processing JMS queues or publishing new events based on database transactions. Oracle Data Integrator allows full control of its runtime sessions through web services, so that integration jobs can become part of business processes. Oracle Data Service Integrator provides a data virtualization layer over your distributed sources, allowing unified reading and updating for heterogeneous data without replicating and moving data. Oracle Enterprise Data Quality provides data quality services to cleanse and deduplicate your records through web services.

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• Terminal closing itself after 14.04 upgrade

  - by David

  All was fine in 12.04, in this case I'm using virtualbox in Windows. Last days the warning message about my Ubuntu version no longer being supported was coming up pretty often, so, yesterday I finally decided to upgrade. The upgrading process ran ok, no errors, no warnings. After rebooting the errors started to happen. Just after booting up there were some errors about video, gnome, and video textures (sorry I didn't care in that moment so I don't remember well). Luckly that went away after installing VirtualBox additions. But the big problem here is that I can't use the terminal. It opens Ok when pressing control+alt+t, but most of the commands cause instant closing. For example, df, ls, mv, cd... usually work, although it has closed few times. But 'find' causes instant close. 'apt-get' update kills it too, just after it gets the package list from the sources, when it starts processing them. I've tried xterm, everything works and I have none of that problems. I have tried reinstalling konsole, bash-static, bash-completion, but nothing worked. I have no idea what to do as there is no error message to search for the cause. It seems something related to bash, but that's all I know.

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• Eclipse Java Code Formatter in NetBeans Plugin Manager

  - by Geertjan

  Great news for Eclipse refugees everywhere. Benno Markiewicz forked the Eclipse formatter plugin that I blogged about sometime ago (here and here)... and he fixed many bugs, while also adding new features. It's a handy plugin when you're (a) switching from Eclipse to NetBeans and want to continue using your old formatting rules and (b) working in a polyglot IDE team, i.e., now the formatting rules defined in Eclipse can be imported into NetBeans IDE and everyone will happily be able to conform to the same set of formatting standards. And now you can get it directly from Tools | Plugins in NetBeans IDE 7.4: News from Benno on the plugin, received from him today: The plugin is verified by the NetBeans community and available in the Plugin Manager in NetBeans IDE 7.4 (as shown above) and also at the NetBeans Plugin Portal here, where you can also read quite some info about the plugin:  http://plugins.netbeans.org/plugin/50877/eclipse-code-formatter-for-java The issue with empty undo buffer was solved with the help of junichi11: https://github.com/markiewb/eclipsecodeformatter_for_netbeans/issues/18 The issue with the lost breakpoints remains unsolved and there was no further feedback. That is the main reason why the save action isn't activated by default. See also the open known issues at https://github.com/markiewb/eclipsecodeformatter_for_netbeans/issues?state=open Features are as follows:  Global configuration and project specific configuration.  On save action, which is disabled by default. Show the used formatter as a notification, which is enabled by default.  Finally, Benno testifies to the usefulness, stability, and reliability of the plugin: I use the Eclipse formatter provided by this plugin every day at work. Before I commit, I format the sources. It works and that's it. I am pleased with it. Here's where the Eclipse formatter is defined globally in Tools | Options: And here is per-project configuration, i.e., use the Project Properties dialog of any project to override the global settings:  Interested to hear from anyone who tries the plugin and has any feedback of any kind! 

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• What music players (or related applications) are there that would allow displaying/editing embedded lyrics of music tracks?

  - by cipricus

  I use OSD Lyrics and CoverGloobus. They are good, they search and eventually download lyrics, when they can find them. The sources used by OSD Lyrics, for example, are rather limited (although I love the way it displays them. The latter accesses a reacher database, but the display is not adjustable as far as I know). Couldn't find a way to make these programs see lyrics from a file selected by me. What I want is to be able to add the lyrics myself, and even to embed them into the music file - and, of course, to display them from there. The last feature alone would be very valuable to me, as I have a large music database with lyrics already embedded, but I cannot see them with these programs: they are just looking for new lyrics on the Internet, although the lyrics are on my computer. In Windows I used Foobar2000 to find, display and embed lyrics (with the add-on lyricsgrabber) and when I needed to add the lyrics manually I used to embed them in MediaMonkey (this player allows finding them, but also editing and embedding - just by copy/paste). I am not able to run MediaMonkey in Wine. Foobar works, but with a lot of problems. And anyway, Wine is of last resort. I am looking for a Linux program that would be able to do something similar to what I have described above.

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• apt-get update stuck on "Waiting for Headers"

  - by crasic

  I'm setting up a Maverick server on a spare PC. The install completes fine and the system boots up into the shell. However, when I try to do a apt-get update , apt hangs on almost every entry with the message 99% [Waiting for headers] sometimes a message of 96 b/s appears on the far right. The actual percent that it claims also varies. Searching around online gave a potential solution by using the option Acquire::http::Pipeline-Depth="0" this somewhat alleviates the problem, i.e. it stalls on every other entry with the same message as above. If you wait it out (the whole update took about 4 hours), the update still fails as a good portion of the hits show a "unable to connect" or similar message, despite the fact that I can ping the server from the pc just fine. The problem is also unrelated to the mirror used since I've tried about a dozen mirrors with no success, I've even tried commenting out everything but the main entry in sources.list and it still refuses to update. The network connection is fine since I can ping and wget (apt won't let me install lynx until I run a successful update) just fine. I've also reinstalled the distro with no luck. The only thing weird about the setup is that the PC is connecting to the internet through my windows laptop with ICS configured properly, but as I've said before, the network connection is fine.

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• JDK8 New Build Infrastructure

  - by kto

  I unintentionally posted this before I verified everything, so once I have verified it all works, I'll updated this post. But this is what should work... Most Interesting Builder in the World: "I don't always build the jdk, but when I do, I prefer The New JDK8 Build Infrastructure. Stay built, my friends." So the new Build Infrastructure changes have been integrated into the jdk8/build forest along side the older Makefiles (newer in makefiles/ and older ones in make/). The default is still the older makefiles. Instructions can be found in the Build-Infra Project User Guide. The Build-Infra project's goal is to create the fastest build possible and correct many of the build issues we have been carrying around for years. I cannot take credit for much of this work, and wish to recognize the people who do so much work on this (and will probably still do more), see the New Build Infrastructure Changeset for a list of these talented and hard working JDK engineers. A big "THANK YOU" from me. Of course, every OS and system is different, and the focus has been on Linux X64 to start, Ubuntu 11.10 X64 in particular. So there are at least a base set of system packages you need. On Ubuntu 11.10 X64, you should run the following after getting into a root permissions situation (e.g. have run "sudo bash"): apt-get install aptitude aptitude update aptitude install mercurial openjdk-7-jdk rpm ssh expect tcsh csh ksh gawk g++ build-essential lesstif2-dev Then get the jdk8/build sources: hg clone http://hg.openjdk.java.net/jdk8/build jdk8-build cd jdk8-build sh ./get_source.sh Then do your build: cd common/makefiles bash ../autoconf/configure make We still have lots to do, but this is a tremendous start. -kto

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• Why the clip space in OpenGL has 4 dimensions?

  - by user827992

  I will use this as a generic reference, but the more i browser online docs and books, the less i understand about this. const float vertexPositions[] = { 0.75f, 0.75f, 0.0f, 1.0f, 0.75f, -0.75f, 0.0f, 1.0f, -0.75f, -0.75f, 0.0f, 1.0f, }; in this online book there is an example about how to draw the first and classic hello world for OpenGL about making a triangle. The vertex structure for the triangle is declared as stated in the code above. The book, as all the other sources about this, stress the point that the Clip Space is a 4D structure that is used to basically decide what will be rasterized and rendered to the screen. Here I have my questions: i can't imagine something in 4D, i don't think that a human can do that, what is a 4D for this Clip space ? the most human-readable doc that i have read speaks about a camera, which is just an abstraction over the clipping concept, and i get that, the problem is, why not using the concept of a camera in the first place which is a more familiar 3D structure? The only problem with the concept of a camera is that you need to define the prospective in other way and so you basically have to add another statement about what kind of camera you wish to have. How i'm supposed to read this 0.75f, 0.75f, 0.0f, 1.0f ? All i get is that they are all float values and i get the meaning of the first 3 values, what does it mean the last one?

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• Class Design - Space Simulator

  - by Peteyslatts

  I have pretty much taught myself everything I know about programming, so while I know how to teach myself (books, internet and reading API's), I'm finding that there hasn't been a whole lot in the way of good programming. So I have two questions: First the broad one: Does anyone have suggestions as to sources for learning about good programming habits and techniques? I'd prefer it if the resource wasn't a 5000 page tome. The more I can read it in installments the better. More specifically: I am finishing up learning the basics of XNA and I want to create a space simulator to test my knowledge. This isn't a full scale simulator, but just something that covers everything I learned. It's also going to be modular so I can build on it, after I get the basics down. One of the early features I want to implement is AI. And I want to take this into account as I'm designing my classes so I can minimize rewriting code. So my question: How should I design ship classes so that both the player and AI can use them? The only idea I have so far is: Create a ship class that contains stats, models, textures, collision data etc. The player and AI would then have the data for position, rotation, health, etc and would base their status off of the ship stats.

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• Unable to run 'sudo apt-get dist-upgrade' due to authentication issues

  - by TobyG

  I've just attempted to run sudo apt-get dist-upgrade on my Ubuntu box, but am getting the following error... WARNING: The following packages cannot be authenticated! librdbmspp php5-ioncube-loader sw-libboost-date-time1.49.0 sw-libboost-system1.49.0 sw-libboost-filesystem1.49.0 sw-libboost-program-options1.49.0 sw-libboost-regex1.49.0 sw-libboost-serialization1.49.0 sw-libpoco I've tried running... $ sudo apt-key update $ sudo apt-get update ... as found in this question, but I'm still getting the error. Can anyone help, please? Update on 5th June Repos currently in /etc/apt/sources.list (links broken due to reputation being too low to include more than 2 links)… deb http: //gb.archive.ubuntu.com/ubuntu/ precise main restricted universe multiverse deb http: //gb.archive.ubuntu.com/ubuntu/ precise-updates main restricted universe multiverse deb http: //gb.archive.ubuntu.com/ubuntu precise-security main restricted universe multiverse deb http: //archive.canonical.com/ubuntu precise partner deb-src http://archive.canonical.com/ubuntu precise partner deb http: //security.ubuntu.com/ubuntu precise-security main restricted universe multiverse deb-src http://security.ubuntu.com/ubuntu precise-security main restricted universe multiverse deb http: //autoinstall.plesk.com/ubuntu/PSA_11.5.30 precise all deb http: //autoinstall.plesk.com/debian/SITEBUILDER_11.5.10 all all deb http: //autoinstall.plesk.com/debian/BILLING_11.5.30 all all

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• The tale of how the PowerShell CmdLets got installed with Azure SDK 1.4

  - by Enrique Lima

  I installed the Azure SDK 1.4 while rebuilding my laptop and ran the installation for the Windows Azure Service Management PowerShell CmdLets. Kicked off the installation script for the WASM PowerShell CmdLets by locating the path to which WASM PowerShell CmdLets was deployed to. Double clicked the startHere command. It will then open the WASM installation dialog. Click Next. Click Next. Notice the red x next to the Azure SDK 1.3, the problem is I have SDK 1.4 Here is the workaround, I go back to the location of the deployed WASM sources. Go into the setup path, then scripts>dependencies>check. Now, locate the CheckAzureSDK.ps1 file, and right-click, then edit. This is the content in the ps1 file, it check for the specific version of the Azure SDK, in this case, it is looking for version 1.3.11133.0038. We need for it to check for version 1.4.20227.1419 Now, save your ps1 file, go back to the open WASM install dialog, and click rescan. This time it should pass, then click next. A Command prompt window will appear, click any key. This completes the installation, click Close.

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• Oracle as a Service in the Cloud

  - by Jason Williamson

  This should really be a Tweet, but I guess I'm writing a bit more. In theme of data migration and legacy modernization, I am seeing more and more of a push to consolidate data sources, especially from non-oracle to oracle in an effort to save dollars. From a modernization perspective, this fits in quite well. We are able to migrate things like Terradata, Sybase and DB2 and put that all into an Oracle database and then provide that as a OaaS (Oracle as a Service) Cloud offering. This seems to be a growing trend, and not unlike the cool RDS Amazon Database cloud being built on Oracle as well. We again find ourselves back in the similar theme of migration, however. The target technology sounds like a winner (COBOL to Java/SOA...DB2/Datacom/Adabas to Oracle) but the age-old problem of how to get there still persists. It it not trivial to migrate large amounts of pre-relational or "devolved" relational data. To do this, we again must revert back to a tight roadmap to migration and leverage the growing tools and services that we have. I'm working on a couple of new sections and chapters for a book that Tom and Prakash and I are writing around Database Migration and Consolidation. I'll share some snipits shortly.

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• Sandcastle Help File Builder - October 2010 release

  - by TATWORTH

  At http://shfb.codeplex.com/releases/view/92191, the latest Sandcastle has been released. I am pleased to say that it incorporates the generic version of a fix, I originated that allows projects including Crystal Reports to be documented.Here is the relevant passage from the help file:"The default configuration for MRefBuilder has been updated to ignore the Crystal Reports licensing assembly (BusinessObjects.Licensing.KeycodeDecoder) if it fails to get resolved. This assembly does not appear to be available and ignoring it prevents projects that include Crystal Reports assemblies from failing and being unbuildable."There are many other fixes. Here are the release notes:IMPORTANT: On some systems, the content of the ZIP file is blocked and the installer may fail to run. Before extracting it, right click on the ZIP file, select Properties, and click on the Unblock button if it is present in the lower right corner of the General tab in the properties dialog.This release supports the Sandcastle October 2012 Release (v2.7.1.0). It includes full support for generating, installing, and removing MS Help Viewer files. This new release supports Visual Studio 2010 and 2012 solutions and projects as documentation sources, and adds support for projects targeting the .NET 4.5 Framework, .NET Portable Library 4.5, and .NET for Windows Store Apps.See the Sandcastle 2.7.1.0 Release Notes for details on all of the changes made to the underlying Sandcastle tools and presentation styles.This release uses the Sandcastle Guided Installation package. Download and extract to a folder and then runSandcastleInstaller.exe to run the guided installation of Sandcastle, the various extra items, the Sandcastle Help File Builder core components, and the Visual Studio extension package.What's IncludedHelp 1 compiler check and instructions on where to download it and how to install it if neededHelp 2 compiler check and instructions on where to download it and how to install it if neededSandcastle October 2012 2.7.1.0An option to install the MAML schemas in Visual Studio to provide IntelliSense for MAML topicsSandcastle Help File Builder 1.9.5.0SHFB Visual Studio Extension PackageFor more information about the Visual Studio extension package, see the Visual Studio Package help file topic.

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• My Only Gripe With Programming

  - by David Espejo

  Is that im having trouble practicing problems. Even if I decide to practice the problems from my C++ book, they dont give any idea of the way the solution(program) should look like, so that I may compare to see if my program is similar in anyway. My book gives me to many generic "Write a program to do "this" " projects without really showing a concrete example of what "this" really is. In other words How Do I Know That I did "that". One problem in my book said to write a program that calculates the sales tax on a given item????? First of all slase tax differs on state(whats the state,) whats the item(a house, a dog,) How can I check this to see if im right. Programming books dont have answer keys! I know that there is no ABSOLUTE answer, thats just silly, programs can be written in many ways, but a sample of what one would look like based of the difficulty of the problem would really help! Is there a solution to this, maby a book that has worked out examples for the problems they give , or online sources that do something similar.(is there such thing as a programming book with an answer key?)

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• SQL Server Database Settings

  - by rbishop

  For those using Data Relationship Management on Oracle DB this does not apply, but for those using Microsoft SQL Server it is highly recommended that you run with Snapshot Isolation Mode. The Data Governance module will not function correctly without this mode enabled. All new Data Relationship Management repositories are created with this mode enabled by default. This mode makes SQL Server (2005+) behave more like Oracle DB where readers simply see older versions of rows while a write is in progress, instead of readers being blocked by locks while a write takes place. Many common sources of deadlocks are eliminated. For example, if one user starts a 5 minute transaction updating half the rows in a table, without snapshot isolation everyone else reading the table will be blocked waiting. With snapshot isolation, they will see the rows as they were before the write transaction started. Conversely, if the readers had started first, the writer won't be stuck waiting for them to finish reading... the writes can begin immediately without affecting the current transactions. To make this change, make sure no one is using the target database (eg: put it into single-user mode), then run these commands: ALTER DATABASE [DB] SET ALLOW_SNAPSHOT_ISOLATION ONALTER DATABASE [DB] SET READ_COMMITTED_SNAPSHOT ON Please make sure you coordinate with your DBA team to ensure tempdb is appropriately setup to support snapshot isolation mode, as the extra row versions are stored in tempdb until the transactions are committed. Let me take this opportunity to extremely strongly highly recommend that you use solid state storage for your databases with appropriate iSCSI, FiberChannel, or SAN bandwidth. The performance gains are significant and there is no excuse for not using 100% solid state storage in 2013. Actually unless you need to store petabytes of archival data, there is no excuse for using hard drives in any systems, whether laptops, desktops, application servers, or database servers. The productivity benefits alone are tremendous, not to mention power consumption, heat, etc.

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• Why is CS never a topic of conversation of the layman? [closed]

  - by hydroparadise

  Granted, every profession has it's technicalities. If you are an MD, you better know the anatomy of the human body, and if you are astronomer, you better know your calculus. Yet, you don't have to know these more advance topics to know that smoking might give you lung cancer because of carcinogens or the moon revolves around the earth because of gravity (thank you Discovery Channel). There's sort of a common knowledge (at least in more developed countries) of these more advanced topics. With that said, why are things like recursive descent parsing, BNF, or Turing machines hardly ever mentioned outsided 3000 or 4000 level classes in a university setting or between colleagues? Even back in my days before college in my pursuit of knowledge on how computers work, these very important topics (IMHO) never seem to get the light of day. Many different sources and sites go into "What is a processor?" or "What is RAM?", or "What is an OS?". You might get lucky and discover something about programming languages and how they play a role in how applications are created, but nothing about the tools for creating the language itself. To extend this idea, Dennis Ritchie died shortly after Steve Jobs, yet Dennis Ritchie got very little press compared to Steve Jobs. So, the heart of my question: Does the public in general not care to hear about computer science topics that make the technology in their lives work, or does the computer science community not lend itself to the general public to close the knowledge gap? Am I wrong to think the general public has the same thirst for knowledge on how things work as I do? Please consider the question carefully before answering or vote closing please.

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• Baseline for GIS Applications

  - by Geertjan

  The application I introduced here yesterday can best be understood via its author's explanation: "As I developed several different WorldWind-based applications, I noticed that they all started out the same. Terramenta was born so I wouldn't have to recreate the baseline every time, I could just provide NetBeans plugin modules to introduce the new features required by different projects." So, to try it out for myself, I checked out the sources from the Mercurial repo today, built them, and ran them. hg clone https://bitbucket.org/heidtmare/terramenta On Windows, things worked fine, on Ubuntu they didn't because the relevant native libraries aren't provided yet out of the box. Here's the result: The above provides the WorldWind globe, together with all the standard options, e.g., for showing names and other WorldWind features, together with several features that I don't understand yet, such as tools for creating shapes and a recorder for replaying sequences. The complete application is like this, i.e., one single functionality module is provided, which exposes several API packages that can be extended: It would really be cool if the above module could also be added to a Maven-based application via a reference to a Maven repository, in the way that Timon Veenstra and the AgroSense team have made available their GeoViewer. One cool thing from the GeoViewer solution is the Flamingo menubar, which I added to Terramenta by simply putting the dependency below into the application POM: <dependency>    <groupId>nl.cloudfarming.client</groupId>    <artifactId>menu</artifactId>    <version>1.0.24</version></dependency> The result, without doing anything other than the above: I am looking forward to helping to document the use cases and developer scenarios for Terramenta! Something like this, created by Timon to demonstrate the GeoViewer use case would be cool to have: http://java.net/projects/agrosense/pages/ExampleGeoviewerNormal

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• With the outcome of the Oracle vs Google trial, does that mean Mono is now safe from Microsoft [closed]

  - by Evan Plaice

  According to the an article on ArsTechnica the judge of the case ruled that APIs are not patent-able. He referred to the structure of modules/methods/classes/functions as being like libraries/books/chapters. To patent an API would be putting a patent on thought itself. It's the internal implementations that really matter. With that in mind, Mono (C# clone for Linux/Mac) has always been viewed tentatively because, even though C# and the CLI are ECMA standards, Microsoft holds a patent on the technology. Microsoft holds a covenant not to sue open source developers based on their patents but has maintained the ability to pull the plug on the Mono development team if they felt the project was a threat. With the recent ruling, is Mono finally out of the woods. A firm precedent has been established that patents can't be applied to APIs. From what I understand, none of the Mono implementation is copied verbatim, only the API structure and functionality. It's a topic I have been personally interested in for years now as I have spent a lot of time developing cross-platform C# libraries in MonoDevelop. I acknowledge that this is a controversial topic, if you have opinions that's what commenting is for. Try to keep the answers factual and based on established sources.

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• what's the difference between Routed Events and Attached Events?

  - by vverma01

  I tried to find through various sources but still unable to understand difference between routed events and attached events in WPF. Most of the places of reference for attached event following example is used: <StackPanel Button.Click="StackPanel_Click"> <Button Content="Click Me!" Height="35" Width="150" Margin="5" /> </StackPanel> Explained as: stack panel do not contain Click event and hence Button.Click event is attached to Stack Panel. Where as msdn says: You can also name any event from any object that is accessible through the default namespace by using a typename.event partially qualified name; this syntax supports attaching handlers for routed events where the handler is intended to handle events routing from child elements, but the parent element does not also have that event in its members table. This syntax resembles an attached event syntax, but the event here is not a true attached event. Instead, you are referencing an event with a qualified name. According to MSDN information as pasted above, the above example of Buttons and StackPanel is actually a routed event example and not true attached event example. In case if above example is truly about usage of attached event (Button.Click="StackPanel_Click") then it's in contradiction to the information as provided at MSDN which says Another syntax usage that resembles typename.eventname attached event syntax but is not strictly speaking an attached event usage is when you attach handlers for routed events that are raised by child elements. You attach the handlers to a common parent, to take advantage of event routing, even though the common parent might not have the relevant routed event as a member. A similar question was raised in this Stack Overflow post, but unfortunately this question was closed before it could collect any response. Please help me to understand how attached events are different from routed events and also clarify the ambiguity as pointed above.

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