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  • Technique to Solve Hard Programming logic

    - by Paresh Mayani
    I have heard about many techniques which are used by developer/software manager to solve hard programming logic or to create flow of an application and this flow will be implemented by developers to create an actual application. Some of the technique which i know, are: Flowchart Screen-Layout Data Flow Diagram E-R Diagram Algorithm of every programs I'd like to know about two facts: (1) Are there any techniques other than this ? (2) Which one is the most suitable to solve hard programming logic and process of application creation?

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  • Free Webinar: Monitoring your business, not just your servers – Getting the most out of SQL Monitor

    Wednesday July 25 2012, 6:00pm BST: Learn how you can use SQL Monitor to gather information and alert on extra performance data for your servers and applications, making this tool vital for keeping an eye on your business. In this free webinar David Bick, Product Manager at Red Gate, will give you an overview of SQL Monitor including the new custom metric functionality in v3. Repeatable deployment without fear of data lossUse your version control system with the SSMS plug-in SQL Source Control and SQL Compare for accurate deployments without the worry. Find out more.

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  • ubuntu 12.04 server doesn't resolve local domain name

    - by jdog
    After apt-get upgrade this morning, my Ubuntu 12.04 web server does no longer resolve a domain name hosted on it. I also received the error message: "resolvconf: Error: /etc/resolv.conf isn't a symlink, not doing anything." I found this question Network Manager not populating resolv.conf but the solutions provided there did not resolve the problem. Creating the symlink in fact caused websites to load very slowly, so I assume there is some sort of (reverse?) DNS lookup not working, when I create the symlink.

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  • Cannot boot normally, without restarting lightdm (or gdm)

    - by leventov
    I had a problem precisely described here: http://www.webupd8.org/2013/01/ubuntu-lightdm-black-screen-when-using.html, black screen with blinking cursor instead of login screen. I've switched to gdm using sudo dpkg-reconfigure gdm -- but faced the same problem, now loading process stops on "red-white Ubuntu dots" (without activity under this splash). And to login, I still need to restart display manager: Ctrl+Alt+F1 and sudo service gdm restart. How to make Ubuntu to boot normally?

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  • Remapping Alt + F2 in Unity

    - by Jesse
    I disabled the Alt + F2 default shortcut in unity (ubuntu 11.10) using ccsm and I set a new shortcut using the default system shortcut manager (system settings keyboard). And it works, until I execute a command like compiz --replace. After that, all shortcuts keep working normally, except for Alt + F2. It does nothing. Any suggetions to keep the custom Alt + F2 shortcut working after compiz --replace?

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  • KWin Can Cause A Performance Hit Too, But It's Different From Compiz

    <b>Phoronix:</b> "This surprised many so we published another article entitled The Cost Of Running Compiz where we showed the performance penalties of a compositing window manager with different hardware and drivers. This led some to ask whether the performance of KWin also causes the OpenGL frame-rate to drop, so here are those KDE benchmarks."

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  • After Re-opening Laptop, Programs Blink with Each Keystroke, Ubuntu 12.04, Dell Latitude D620

    - by Calhan
    I'm running Ubuntu version 12.04 on Dell D620 laptop and have been for months. Everything has been working fine until a week ago, when suddenly every time I close the laptop and open it again, the program in use blinks each time I make a keystroke. Only the program blinks, not the whole screen. Rebooting solves the issue until I close the lid again. I have installed all the updates recommended in the package manager. Clues?

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  • New: ZFS Storage Appliance Videos

    - by Roxana Babiciu
    Check out part one of a new video series for ZFS Storage Appliance. In video #1, you’ll learn about the advantages built into Oracle’s ZS3 Storage Appliance that come from the unique position that Oracle holds in the market. In video #2, you’ll learn how best to monitor large ZS3 installations as well as the use of Enterprise Manager as a complement to dtrace analytics at the ZFS Storage Appliance device level.

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  • Upcoming Technical Training by PTS

    - by Javier Puerta
    Oracle Big Data Workshop June 24-26, 2014: Paris, France July 09-11, 2014: Paris, France Upgrade Your Solution to Oracle Database 12c Workshop June 17-18, 2014: Lisbon, Portugal July 29-30, 2014: Milan, Italy Oracle 12c Multitenant Technical Workshop July 23-24, 2014: Istanbul, Turkey September 2-3, 2014: Ankara, Turkey Oracle Exadata X4 workshop June 4-5, 2014: Madrid, Spain If registration link is not available, please contact the OPN Enablement manager at your local Oracle office.

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  • How to connect Nokia Lumia 520 to Ubuntu 12.04

    - by pavankumar
    I have done the following steps: sudo add-apt-repository ppa:langdalepl/gvfs-mtp sudo apt-get update and updated some packages from update manager. After doing above steps I am able to see lumia phone name in file system. But when I try to mount device I am getting following errors: Unable to mount RM-914|Nokia Lumia 520 Unable to open MTP device '[usb:001,010]' Is there any way to solve these problem?

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  • Requires installation of untrusted packages?

    - by Isaiah Bugarin
    I tried installing VLC Player yesterday, and I got the Requires installation of untrusted packages error. I searched for hours for a solution to this problem, and finally came upon a suggestion that said to change servers for downloading updates from. I did this, and it gave me a 404 error when I clicked on "Check" in the Update Manager. I tried switching my server back to the main one (and after that, several other ones), but I am now still getting a 404 error: And the other error I get when downloading or updating:

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  • After update, grub is broken.

    - by Bryan Allan
    Some months back I used wubi to install ubuntu on an hp laptop with vista. After not using it for a month or so, I loaded ubuntu and installed many updates (including kernel update). Windows boot manager loads without any problems, and I can boot to vista without problems. However, if I choose ubuntu, the screen briefly flashes Try (hd0,0) : NTFS5 and then goes to black. I never get to the kernel image selection screen.

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  • Should I expose IObservable<T> on my interfaces?

    - by Alex
    My colleague and I have dispute. We are writing a .NET application that processes massive amounts of data. It receives data elements, groups subsets of them into blocks according to some criterion and processes those blocks. Let's say we have data items of type Foo arriving some source (from the network, for example) one by one. We wish to gather subsets of related objects of type Foo, construct an object of type Bar from each such subset and process objects of type Bar. One of us suggested the following design. Its main theme is exposing IObservable objects directly from the interfaces of our components. // ********* Interfaces ********** interface IFooSource { // this is the event-stream of objects of type Foo IObservable<Foo> FooArrivals { get; } } interface IBarSource { // this is the event-stream of objects of type Bar IObservable<Bar> BarArrivals { get; } } / ********* Implementations ********* class FooSource : IFooSource { // Here we put logic that receives Foo objects from the network and publishes them to the FooArrivals event stream. } class FooSubsetsToBarConverter : IBarSource { IFooSource fooSource; IObservable<Bar> BarArrivals { get { // Do some fancy Rx operators on fooSource.FooArrivals, like Buffer, Window, Join and others and return IObservable<Bar> } } } // this class will subscribe to the bar source and do processing class BarsProcessor { BarsProcessor(IBarSource barSource); void Subscribe(); } // ******************* Main ************************ class Program { public static void Main(string[] args) { var fooSource = FooSourceFactory.Create(); var barsProcessor = BarsProcessorFactory.Create(fooSource) // this will create FooSubsetToBarConverter and BarsProcessor barsProcessor.Subscribe(); fooSource.Run(); // this enters a loop of listening for Foo objects from the network and notifying about their arrival. } } The other suggested another design that its main theme is using our own publisher/subscriber interfaces and using Rx inside the implementations only when needed. //********** interfaces ********* interface IPublisher<T> { void Subscribe(ISubscriber<T> subscriber); } interface ISubscriber<T> { Action<T> Callback { get; } } //********** implementations ********* class FooSource : IPublisher<Foo> { public void Subscribe(ISubscriber<Foo> subscriber) { /* ... */ } // here we put logic that receives Foo objects from some source (the network?) publishes them to the registered subscribers } class FooSubsetsToBarConverter : ISubscriber<Foo>, IPublisher<Bar> { void Callback(Foo foo) { // here we put logic that aggregates Foo objects and publishes Bars when we have received a subset of Foos that match our criteria // maybe we use Rx here internally. } public void Subscribe(ISubscriber<Bar> subscriber) { /* ... */ } } class BarsProcessor : ISubscriber<Bar> { void Callback(Bar bar) { // here we put code that processes Bar objects } } //********** program ********* class Program { public static void Main(string[] args) { var fooSource = fooSourceFactory.Create(); var barsProcessor = barsProcessorFactory.Create(fooSource) // this will create BarsProcessor and perform all the necessary subscriptions fooSource.Run(); // this enters a loop of listening for Foo objects from the network and notifying about their arrival. } } Which one do you think is better? Exposing IObservable and making our components create new event streams from Rx operators, or defining our own publisher/subscriber interfaces and using Rx internally if needed? Here are some things to consider about the designs: In the first design the consumer of our interfaces has the whole power of Rx at his/her fingertips and can perform any Rx operators. One of us claims this is an advantage and the other claims that this is a drawback. The second design allows us to use any publisher/subscriber architecture under the hood. The first design ties us to Rx. If we wish to use the power of Rx, it requires more work in the second design because we need to translate the custom publisher/subscriber implementation to Rx and back. It requires writing glue code for every class that wishes to do some event processing.

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  • Why do I have to add a PPA twice (once to add it to the list of repo, second time to fix a BAD GPG)

    - by Luis Alvarado
    I notice the following: I add a ppa using add-apt-repository, for example the wine ppa, mozilla security, nvidia drivers, etc.. When I go to the Update Manager and tell it to CHECK for updates it throws me a PPA error. To solve the error I add the same PPA again. Why do I have to add the PPA again (This also can be done by adding the received key alone with apt-key) but why does this problem happen anyway.

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  • Learn SSIS in London 12-14 Sep 2012!

    - by andyleonard
    My friends at TechniTrain , the students, and I had a blast during the March 2012 London delivery of From Zero To SSIS ! We have decided to do it again in September 2012 with my new Learning SSIS 2012 3-day course ! Please find a course outline here . It is difficult to list everything I cover in the course, but the outline hits the high spots. This material grew out of my experiences serving as a consultant on short-term engagements and as a manager (and enterprise ETL architect) for a team of forty...(read more)

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  • {12.04} cannot open software center or use apt-get install

    - by d6braun
    i have been trying to get it working for over an hour and a half now, the code below is what i keep getting. the example is from me trying to install synaptic, but i get the errors on most apt-get commands and update manager. sudo apt-get install synaptic Reading package lists... Error! E: Encountered a section with no Package: header E: Problem with MergeList /var/lib/apt/lists/wine.budgetdedicated.com_apt_dists_edgy_main_binary-i386_Packages E: The package lists or status file could not be parsed or opened.

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  • Change the complete KDE Desktop Look like a Theme?

    - by piedro
    Is there any application to change the complete look of KDE like a theme in gnome? Without changing the colors, icons, styles, backgrounds, decorators and so forth individually but in one process instead? Something like a theme manager? I would like to create a complete KDE Desktop look & style and then share it with friends without setting up 8 sets of settings with all kinds of importing files and setups.

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  • Software Center seems to freeze system when installing, syslog has "blocked for more than 120 seconds" errors

    - by nbm
    12.04 (precise) 64-bit Kernel Linux 3.2.0-39 3.6GB memory Intel Core 2 Duo CPU @ 2.40GHz x2 WUBI-installed Ubuntu running on a MacBook Pro 7.1 with OSX running Vista via Boot Camp (hey, I like lots of OS's m'kay?) When installing from Ubuntu software center my system very frequently freezes. This has happened 4 of the last 5 installs. Most recently I was installing the Google Earth .deb from Google's website: clicking the .deb file automatically opens Software Center (otherwise I would have used Synaptic, as I've grown to expect Software Center to freeze my system and I'm rather tired of it.) By "freeze" I mean nothing works: no dash, no launcher, no mouse movement, no alt-tab, can't open terminal (keyboard does not work). Software center does show the "installing" icon but after that it greys out and I can't click anything. REISUB has no effect but a cold power-down and restart is possible. Occasionally, after 5-10 minutes, I'll be able to move the mouse / use the keyboard and run a launcher command or two, although other open apps (Chrome and Software Center) will still be greyed-out/frozen. (I've never waited longer than that - if still unresponsive after 15 minutes I just power down and restart.) Most recently, which is why I am finally posting a question, I waited about 15 minutes and was finally able to open System Monitor while this was going on. Processes tells me that System Monitor is using about 20% of CPU, and nothing else is using much (zeros mostly). In fact I didn't even see Software Center listed? However at this point the system finally partially unfroze, the installation completed, and while I wasn't about to close Software Center I was able to do a system shutdown and fresh restart and I went and took a look at the syslog. In /var/log/syslog I see a lot of ":blocked for more than 120 seconds" messages. Similar to ubuntu hang out with this message :blocked for more than 120 seconds Which has not been answered, and I'm not running a virtual machine. My full syslog with stack traces looks very, very similar to this: Why do tasks on Amazon Xen instance block for over 120 seconds causing server to hang? Note that that question was solved, but that's because the problem was being caused by Amazon and Amazon fixed the bug. I'm not running anything Amazon-related. My syslog does look very similar, however. My question is also similar to this: Troubleshooting server hang But the referenced "duplicate" in that question is about how to kill processes/restart when the system freezes. I know how to kill processes and restart. I want to figure out what is causing the problem so I can try to fix it. I realize that I could just use Synaptic instead of Ubuntu Software Center, but I'd like to try to solve the problem if possible. I'm thinking I should perhaps submit a bug report, but I wanted to first see if anyone else was having any similar problems, and if so what you all did to fix it. I see a number of questions about Software Center freezing and others, including those I linked, about the "blocked for more than 120 seconds" log error, but I didn't see any question that links the two. I did save a copy of the syslog report if anyone wants to see it, but as mentioned it's quite similar to the one posted in the Amazon-related question...and I didn't want to take up even more space unnecessarily as, my apologies - this question has already become extremely verbose!

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  • Deploying, but without those pesky test files!

    - by Chris Skardon
    Silverlight testing is great, we all know that (don’t we??), we’re expected to do it as part of the development process, but once we’ve got an awesome application written and we come to deploy it, we don’t want the test files going out with it… You might be like me, have the files in a Web project – let’s face it, that’s how we’re pushed into doing it… So let’s stick with it! Now. I’m deploying via the wonders of the Web Deployment shizzle, but this also applies to the classic ‘installer’ project as well.. Baaaasically, we’re going to use the ‘Debug’ / ‘Release’ configurations to include given files. ?? OK, you know in the top of your visual studio editor, you (usually) have a drop down which predominantly reads ‘Debug’? Those are ‘configurations’. Mostly we don’t bother changing it, primarily due to laziness, but also the fact that we generally don’t see ‘Release’ as actually doing anything other than making it harder to find problems :) Well today my friends we’re going to change that bad boy… The next few steps are just helping you set up a new ‘Debug’ configuration, but you can just switch to the ‘Release’ configuration and skip to the end… First let’s go to the Configuration Manager. There are multiple ways, through the ‘Build’ menu (at the bottom), or via the drop down which currently has ‘Debug’ in it :) Got it? Select ‘New’ from the ‘Active solution configuration’ drop down: Create a new configuration, kind of like the picture below shows (or for those graphically challenged – Name: DebugWithNoTests, and Copy settings from: ‘Debug’, ensuring the ‘Create new project configurations’ checkbox is checked). Press OK. VS will do some shizzle, and in the Configuration manager, you will see pretty much exactly what you did before, only with ‘Debug’ replaced with ‘DebugWithNoTests’. Turn off the build options for the test projects. We won’t need them.. IF you skipped down from the top, this is where you’ll be wanting to stop!!! Close and now we’re one notepad step away from achieving our goals. Yes, I said notepad. You can’t do what we’re going to do in VS. (Pity). Go to the folder where your web project is, and right click on the ‘.csproj’ file. Now open it with notepad. Head on down to the ‘<Content Include’ bits, they’ll look like this: <ItemGroup> <Content Include="ClientBin\Tests.xap" /> ... </ItemGroup> Take this and modify each of the files you don’t want deployed and change to: <Content Include="ClientBin\Tests.xap" Condition="'$(Configuration)' == 'Debug'" /> Once you’ve got that sorted publish your project, once with the Debug configuration selected, and another with any other configuration (‘Release’, ‘DebugWithNoTests’ etc).. No files! Huzzah!

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  • Compiz shortcut with two arrow keys

    - by l0b0
    The "Put" functionality of CompizConfig Settings Manager is great. I'd like to be able to move windows to the desktop corners by using Super+Down/Up+Left/Right for this; is that possible? Whenever I try to set something like that it is just reset to "Disabled". A workaround is of course to use the numeric pad, but I'd like to be able to do this on my EEE laptop as well without enabling and disabling NumLock all the time.

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  • 12.04 - Make Workspaces use the expose feature of compiz

    - by Teddy
    I'm running Ubuntu 12.04 and I just wanted to know if there's a possible way to use the "expose" feature found in CompizConfig Settings Manager as the "Workspaces" icon in the Unity Launcher? I know this feature is great but using Workspaces LAGS A LOT for me, However using Super+S to show up expose works smoothly without lag, is there anyway to use it instead of Workspaces and use expose in replace of it?

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  • Management - Level 9 in the Stairway to Reporting Services

    In the last article of the series, you will learn how to manage your reports once you've finished development, including how to use the Report Manager, deploy reports, and send reports to the appropriate end users. New! SQL Monitor 3.0 Red Gate's multi-server performance monitoring and alerting tool gets results from Day One.Simple to install and easy to use – download a free trial today.

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  • Unable to install openjdk7 from terminal [closed]

    - by Adil
    Possible Duplicate: How can I fix a 404 Error using a PPA? Update manager generates 404 error while attempting update. Will not update When i tried to install jdk from following command: sudo apt-get install openjdk-7-jdk Following error was displayed: Err http://us.archive.ubuntu.com/ubuntu/ precise-updates/universe openjdk-7-jre-lib all 7u7-2.3.2-1ubuntu0.12.04.1 404 Not Found [IP: 91.189.91.15 80] E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

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