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  • Can someone explain how a GUI works and when I should start using one?

    - by David
    I've been learning C++ for about a month now, and before I go any further, I'd like to clear up this tedious question I keep on having. I know what a GUI is, but I don't really know how it works, and maybe examples of popular ones...? Although I know command line programming is the bare fundamentals, I think it'd be fun messing around with a GUI. Although I have around 3 million other questions, I'll save them :D

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  • ESG research note: "Oracle Exadata Covers the Bases"

    - by Javier Puerta
    ESG has published a non-commissioned research note "Oracle Exadata Covers the Bases". The author interviewed several Exadata customers and concludes "Oracle Exadata should lead the pack due to its maturity, and a clear value-added match to several use cases". You can download the full report at http://www.oracle.com/us/corporate/analystreports/enterprise-application/esg-exadata-september2012-1843433.pdf

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  • What are the common pitfalls that would stop Authorised Key SSH access, and how do I find and correct for them?

    - by Ashimema
    EDIT: This question was reworked to make it more useful to the community and less specific to me. Questions seem to come up reasonably often regarding ssh and problems with authorised keys access, but very few seem to have a clear answer anywhere; Server keeps asking for password after I've copied my SSH Public Key to authorized_keys ssh not accepting public key how do I use ssh with key access in 11.10 passwordless ssh not working So, In the communities opinion, what is the tried and tested method for getting to the bottom of such problems?

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  • PowerPivot: Putting two stocks on the same PivotChart

    - by AlbertoFerrari
    In a previous post , I have used a stock exchange scenario to speak about how to compute moving averages in a complex scenario. Playing with the same scenario, I felt the need to compare two stocks on the same chart, choosing the stock names with a slicer. As always, a picture is worth a thousand words, the final result I want to achieve is something like this, where I am comparing Microsoft over Apple during the last 10 years. It is clear that I am not going to comment in any way why traders seem...(read more)

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  • SQL Server Storage Internals 101

    This article is an extract from the book Tribal SQL. In this article, Mark S. Rasmussen offers a concise introduction to the physical storage internals behind SQL Server databases. He doesn't dive into every detail, but provides a simple, clear picture of how SQL Server stores data. Deployment Manager 2 is now free!The new version includes tons of new features and we've launched a completely free Starter Edition! Get Deployment Manager here

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  • Alternatives to multiple inheritance for my architecture (NPCs in a Realtime Strategy game)?

    - by Brettetete
    Coding isn't that hard actually. The hard part is to write code that makes sense, is readable and understandable. So I want to get a better developer and create some solid architecture. So I want to do create an architecture for NPCs in a video-game. It is a Realtime Strategy game like Starcraft, Age of Empires, Command & Conquers, etc etc.. So I'll have different kinds of NPCs. A NPC can have one to many abilities (methods) of these: Build(), Farm() and Attack(). Examples: Worker can Build() and Farm() Warrior can Attack() Citizen can Build(), Farm() and Attack() Fisherman can Farm() and Attack() I hope everything is clear so far. So now I do have my NPC Types and their abilities. But lets come to the technical / programmatical aspect. What would be a good programmatic architecture for my different kinds of NPCs? Okay I could have a base class. Actually I think this is a good way to stick with the DRY principle. So I can have methods like WalkTo(x,y) in my base class since every NPC will be able to move. But now lets come to the real problem. Where do I implement my abilities? (remember: Build(), Farm() and Attack()) Since the abilities will consists of the same logic it would be annoying / break DRY principle to implement them for each NPC (Worker,Warrior, ..). Okay I could implement the abilities within the base class. This would require some kind of logic that verifies if a NPC can use ability X. IsBuilder, CanBuild, .. I think it is clear what I want to express. But I don't feel very well with this idea. This sounds like a bloated base class with too much functionality. I do use C# as programming language. So multiple inheritance isn't an opinion here. Means: Having extra base classes like Fisherman : Farmer, Attacker won't work.

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  • Validation Meta tag for Bing [closed]

    - by Yannis Dran
    Note of the author: I did my research before posting and the old "duplicate" generated over a year ago and things have changed since then. In addition, it was generic question but mine is targeting only ONE search engine machine: BING. FAQ is not clear about how should we deal with these, "duplicate" cases. The "duplicate" can be found here: Validation Meta tags for search engines Should I remove the validation meta tag for the Bing search engine after I validate the website?

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  • Why is MaybeChannelBound callable?

    - by William Payne
    The Queue class in the python kombu library inherits from MaybeChannelBound, which in turn implements the call method (making it callable). The call() method itself is a thin wrapper around the bind() method. It is not clear why this was done, as calling the bind() method seems (to my simple mind, at least) to be clearer and more descriptive of the intent of the function. Why would somebody use the call() method in a situation like this?

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  • Resource Governor

    If you suffer from runaway queries, if you have several database applications with unpredictable fluctuation in workload, or if you need to ensure that workloads get the memory or CPU they need according to certain priorities, then you need Resource Governer, and you need Roy Ernest's clear explanation of the technology. Get Smart with SQL Backup Pro Powerful centralised management, encryption and more.SQL Backup Pro was the smartest kid at school Discover why.

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  • Ubuntu/Windows XP - Joint systems

    - by Brian Buck
    I have a computer sectioned to run both Ubuntu 10.10 and Windows XP but as XP refuses to log in (If I select XP the log in starts with the Windows logo being shown on the screen for a few seconds before the screen goes blank and the page showing the option of selecting Windows or Ubuntu the re-appears), I would like to clear it completely from the system and just run Ubuntu. Can this be done, and if so, how do I proceed with doing it?

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  • Is there an official Ubuntu free technical support team?

    - by João Pinto
    I have found that there is an "Ubuntu Support Team" at https://launchpad.net/~ubuntu-helpteam but I am not sure it's official or active. Please note that I am not referring to bug fixing support, I am referring to the broader OS support, with people available to engage users needing support with a problem and drive it to a proper resolution. Is there an official team for this purpose with a clear scope and activity plan ?

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  • PowerPivot: Putting two stocks on the same PivotChart

    - by AlbertoFerrari
    In a previous post , I have used a stock exchange scenario to speak about how to compute moving averages in a complex scenario. Playing with the same scenario, I felt the need to compare two stocks on the same chart, choosing the stock names with a slicer. As always, a picture is worth a thousand words, the final result I want to achieve is something like this, where I am comparing Microsoft over Apple during the last 10 years. It is clear that I am not going to comment in any way why traders seem...(read more)

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  • Refactoring obscurely commented code

    - by wraith808
    In refactoring code, I came across code that had comments. Looking closer at the comments, I could see that the code was clearly not doing what the comments said. Without access to the coder nor documentation, and without clear direction regarding the code (i.e. defects as to the fact that the code is operating incorrectly), is the best practice to assume that the code is correct, and clean up the comments?

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  • cracked dreamweaver and photoshop - private & professional use [closed]

    - by Céline Chevalier
    I am thinking of downloading the cracked versions of dreamweaver and photoshop. Am planning to do some private projects but also use it when working as a developer (professionally). Is it risky and likely to get caught? How? Not sure if they hack into my pc, find out who I am and accuse me once it is clear that I am (or my pc is) using it, or is this just naive thinking of a new inexperienced web developer?

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  • Certification Progress

    - by NeilHambly
    Like a lot of us, I had set myself some goals @ the start of the year, and I did not make them all that easy I had set myself the goal to become Microsoft certified in SQL Server 2008 & 2012 {the details on what exactly where the 2012 certifications where not clear when the goal was initially set} I duly spent the best part of the 1st half of the year, in studies for and taking the 4 exams to become an MCITP 2008 SQL Server for both Database Administrator & Developer Exam 70-432 This was...(read more)

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  • why client can not receive message from server (java) [migrated]

    - by user1745931
    I have just started learning java. I modified the client side code for a server/client communication program, by creating two threads for the client side, main thread for receiving user's input, and inputThread for receiving server's response. I am sure that server has sent the response to client, however, no response message is obtain at client. Here is my code. Can anyone help me to figure it out? Thanks package clientnio; import java.net.*; import java.nio.*; import java.io.*; import java.nio.channels.*; import java.util.Scanner; public class ClientNIO { public static int bufferLen = 50; public static SocketChannel client; public static ByteBuffer writeBuffer; public static ByteBuffer readBuffer; public static void main(String[] args) { writeBuffer = ByteBuffer.allocate(bufferLen); readBuffer = ByteBuffer.allocate(bufferLen); try { SocketAddress address = new InetSocketAddress("localhost",5505); System.out.println("Local address: "+ address); client=SocketChannel.open(address); client.configureBlocking(false); //readBuffer.flip(); new inputThread(readBuffer); /* String a="asdasdasdasddffasfas"; writeBuffer.put(a.getBytes()); writeBuffer.clear(); int d=client.write(writeBuffer); writeBuffer.flip(); */ while (true) { InputStream inStream = System.in; Scanner scan = new Scanner(inStream); if (scan.hasNext()==true) { String inputLine = scan.nextLine(); writeBuffer.put(inputLine.getBytes()); //writeBuffer.clear(); System.out.println(writeBuffer.remaining()); client.write(writeBuffer); System.out.println("Sending data: "+new String(writeBuffer.array())); writeBuffer.flip(); Thread.sleep(300); } } } catch(Exception e) { System.out.println(e); } } } class inputThread extends Thread { private ByteBuffer readBuffer; public inputThread(ByteBuffer readBuffer1) { System.out.println("Receiving thread starts."); this.readBuffer = readBuffer1; start(); } @Override public void run() { try { while (true) { readBuffer.flip(); int i=ClientNIO.client.read(readBuffer); if(i>0) { byte[] b=readBuffer.array(); System.out.println("Receiving data: "+new String(b)); //client.close(); //System.out.println("Connection closed."); //break; } Thread.sleep(100); } } catch (Exception e) { System.out.println(e); } } }

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  • How to customize live Ubuntu CD?

    - by karthick87
    I would like to customize Ubuntu live CD by installing some additional packages. I have followed this link but it doesn't seems to work. Can anyone provide clear instructions? Thanks in advance! Customization Packages that I want to install: Thunderbird Samba SSH Changes that I need: Remove Games menu from the Application menu Firefox shortcut on desktop Radiance as the default theme Different default Ubuntu wallpaper Note I do not prefer Remastersys, manual way will be appreciated.

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  • How do I toggle the wifi hardware switch for a Dell XPS 17 L702X?

    - by Sparhawk
    Every now and then, I disable my wireless via the menu icon in Ubuntu. Then, when I try to enable the wifi, it tells me that "wireless is disabled" or "wireless is disabled by hardware switch". There is a red icon on the F2 key that looks like a wireless icon, and in Windows, pressing the (red) Fn key and F2 toggles the wifi. This does not work in Ubuntu, leaving me no clear way to turn wifi back on. How can I restart wifi in Ubuntu?

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  • How do I succesfully compile Slingshot?

    - by Tigull
    I've been trying to compile Slingshot for a preview of Elementary OS. Even after replacing Gtk.Stock.CLEAR and Gtk.Stock.add with Gtk.STOCK_CLEAR and Gtk.Stock_add in slingshot/widget/entries .vala I still get the following error when executing sudo ./build_run: frontend/widgets/Entries.vala:130.13-130.25: error: The name `Stock_add' does not exist in the context of `Gtk' Gtk.Stock_add ({stock_item}); ^^^^^^^^^^^^^ Compilation failed: 1 error(s), 0 warning(s) mv: cannot stat `slingshot': No such file or directory ./build_run: 7: slingshot: not found I haven't found yet a soulution, therefore any help is appreciated, thanks!

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  • Export to XML Using SSIS

    Exporting data to XML format using SSIS initially seems like it should be straight forward – just dump it in a flat file and give it a name xml type, however SSIS has no XML destination just an XML source. I had no luck dumping the XML in flat file. My solution was to use a script task which worked well. Check SQL Server performance at a glanceWe consulted 1000 SQL Server professionals to make SQL Monitor’s UI as clear as possible. Start monitoring with a free trial.

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  • apache2 Webdav using VirtualDocumentRoot

    - by picca
    I'm trying to get up dynamical WebDav on my virtual hosts <VirtualHost *:80> # http://www.example.com/test.txt -> /var/www/example.com/www/test.txt VirtualDocumentRoot /var/www/%-2.0.%-1.0/%-3+/ <Location /webdav> Dav On AuthType Basic AuthName "example.com" AuthUserFile /var/www/[PROBLEM-1]/passwd.dav Require valid-user </Location> </VirtualHost> Is there any way I can set dynamically PROBLEM-1 placeholder based on whatever comes with *HTTP_HOST*? More precisely part of it? Example: HTTP_HOST = www.example.com - PROBLEM-1 = example.com HTTP_HOST = example.com - PROBLEM-1 = example.com What I'm trying to do here is to load dav passwd file dynamically based on which domain is requested. It is something like "groups" if you wish. So that owner of domainA is not allowed to access files of domainB. So maybe there is some other solution based on AuthGroupFile directive?

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  • Tutorial: Why Use GRUB2? Good Question! (part 3)

    As we come to the end of Akkana Peck's excellent series on mastering GRUB2, it's not clear what advantages it has over legacy GRUB, or even good old LILO. It seems it's gone backwards. In today's installment we learn how to translate some common and mysterious error messages, and how to manage a multi-boot system with GRUB2.

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