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  • What does 'Lock Version' do?

    - by richzilla
    Having installed an experimental version of dropbox and installed in manually, i dont want the deb in synaptic to download any updates (as theyll over write the changes ive done manually i assume). Ive found the lock version option in synaptic, im assuming this stops a particular deb from downloading any new versions of itself? Also can i just unlock it again when the version from the deb catches up with the experimental version that i have installed? Am i correct or does it serve another function?

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  • SEO Basics - Keywords

    How to use keywords for a better search engine position? First, analyze carefully the keywords related to your website. Choose 2 or 3 keywords and write them down.

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  • Why don't languages include implication as a logical operator?

    - by Maciej Piechotka
    It might be a strange question, but why there is no implication as a logical operator in many languages (Java, C, C++, Python Haskell - although as last one have user defined operators its trivial to add it)? I find logical implication much clearer to write (particularly in asserts or assert-like expressions) then negation with or: encrypt(buf, key, mode, iv = null) { assert (mode != ECB --> iv != null); assert (mode == ECB || iv != null); assert (implies(mode != ECB, iv != null)); // User-defined function }

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  • Curser blinking with any change of referesh rate of any window

    - by samer226047
    my problem is my courser is blinking for any windows that refresh. for example right now each litter i write the courser blink for it , well it's acceptable now but imagine what happen when i open facebook (each picture , each simple element in the web page the courser blink for it) , please help me i really want to move to Ubuntu but problems keep get in my way and push me back to windows PC status : Core i5 , 4G ram , Nvidia optimus 310m , 500G HDD. Condition : it was working good with Ubuntu 13.04 but after the ugprade to 13.10 the problem apear and thanks in advance

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  • Graphical disk surface check tool?

    - by sbergeron
    I need a program that can scan my hard drive for read and write errors so I can partition around them. I REALLY don't do well with numbers but if I can have something that shows an output like the graphical display on gparted that would be perfect. I know a lot of people would recommend replacing the disk but right now I can't as I NEED this laptop for school and can't wait for a hard drive to arrive (I have ordered one, yes, but I don't expect it to arrive for another couple weeks as I only figured out afterwards they still have to manufacture it)

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  • Do other developers feel that as they get better, it becomes harder to get jobs?

    - by nbv4
    When I was starting out, it seemed I had a much better time getting interviews and passing them. But now that I'm more experienced, I'm finding that its harder and harder to find a job. Do other developers out there feel the same way? I'll give you an example. I did an interview last Wednesday. It was a small start-up with only one other engineer and the CEO. They flew me in from Ohio (they are SF based). When I got there, they had me write them a link shortener, which took me about 10 minutes to write. I was supposed to be there all day working on this. When I finished it early, the interviewer seemed kind of shocked. After that, we were talking, and I asked him what they use to store data. He told me Mongo. I ask why he decided to use mongo. He then stammered and mumbled his answer, which basically boiled down to "We're using it because Mongo is a the trendy database technology and we don't want to be left out", which I've found is pretty much most common reason people use NoSQL these days. The interviewer quickly ended the interview and pretty much shoved me out the door. I was supposed to have lunch with the CEO, but I he kicked me out before I had a chance. The intervier wasn't mean or rude, (and neither was I). After I got back to Ohio, I got an email from them saying "I wasn't a fit". This sot of thing happens to me all the time. I'm starting to think "not a fit" can sometimes mean "are too high of a skill level that we are". Is this all in my head, or do other experienced developers notice the same thing happening? Back when I used to struggle with coding problems, I would work with the interviewer and it would be a positive thing and I'd get hired. But now I usually blow through the coding part, and the interviewer being left speechless is working against me. Should I feign struggling with coding problems?

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  • NUMA-aware constructs for java.util.concurrent

    - by Dave
    The constructs in the java.util.concurrent JSR-166 "JUC" concurrency library are currently NUMA-oblivious. That's because we currently don't have the topology discovery infrastructure and underpinnings in place that would allow and enable NUMA-awareness. But some quick throw-away prototypes show that it's possible to write NUMA-aware library code. I happened to use JUC Exchanger as a research vehicle. Another interesting idea is to adapt fork-join work-stealing to favor stealing from queues associated with 'nearby' threads.

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  • zfs raidz1-0 corrupted data, all disks are online

    - by gkcr2d2
    My zfs pool "datas" is unavailable but all my disks are online. Do you know how the problem can be fixed? root@oxygen:~# zpool status pool: datas state: UNAVAIL scan: none requested config: NAME STATE READ WRITE CKSUM datas UNAVAIL 0 0 0 insufficient replicas raidz1-0 UNAVAIL 0 0 0 corrupted data scsi-SATA_ST3000DM001-9YN_W1F0LBVX ONLINE 0 0 0 scsi-SATA_ST3000DM001-9YN_W1F0KYX9 ONLINE 0 0 0 scsi-SATA_ST3000DM001-9YN_W1F0LCC8 ONLINE 0 0 0 scsi-SATA_ST3000DM001-9YN_W1F0LBXZ ONLINE 0 0 0

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  • Does a good programmer need to have good spatial sense?

    - by user297318
    Do you need to have good spatial sense to be a good programmer? I have next to nothing of it (I think it has to do with the differing vision of my eyes). I've already coded quite little things but wonder if this interferes with the ability to 'imagine' the assembly of the code in case of a more complex program? Sorry for my english, I'm Austrian and not so used to write in English.. Thanks for your ansers..

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  • First steps on setting up a query based server [closed]

    - by asghar ashgari
    I got a physical server at home and I want to do the following silly project to learn the concept behind server-backend development, and then do a real project later on: Idea: Turn the server to a calculator. I want any person publicly send a query to the server (i.e., 2+2) from the terminal and the server give me the result. So the question is basically where to start, what sort of software I need to install, and what sort of program I need to write?.

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  • How to Make a Website That Actually Works

    About six weeks ago, one of my blog readers told me something that really pissed me off: "you don't put your actions where your mouth is. You write all these great articles on how to create effective websites but your own site doesn't follow the advice you give." She was right.

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  • What is the difference between "data hiding" and "encapsulation"?

    - by Software Engeneering Learner
    I'm reading "Java concurrency in practice" and there is said: "Fortunately, the same object-oriented techniques that help you write well-organized, maintainable classes - such as encapsulation and data hiding -can also help you create thread-safe classes." The problem #1 - I never heard about data hiding and don't know what it is. The problem #2 - I always thought that encapsulation is using private vs public, and is actually the data hiding. Can you please explain what data hiding is and how it differs from encapsulation?

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  • Easy Web Development With IIS Express

    - by The Official Microsoft IIS Site
    Triggered by a question in the forums the other day, I had started working on a blog post about IIS Express and how it works compared to Visual Studio Development web server, also known as Cassini. During my research I came across this well written and comprehensive post that covers everything that I was going to write about and more. Because of the quality of the information in this post, I wanted to have a quick reference to it in my blog and share it with you. http://www.codeproject.com/Articles...(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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  • Should accessible members of an internal class be internal too?

    - by Jeff Mercado
    I'm designing a set of APIs for some applications I'm working on. I want to keep the code style consistent in all the classes I write but I've found that there are a few inconsistencies that I'm introducing and I don't know what the best way to resolve them is. My example here is specific to C# but this would apply to any language with similar mechanisms. There are a few classes that I need for implementation purposes that I don't necessarily want to expose in the API so I make them internal whereever needed. Generally what I would do is design the class as I normally would (e.g., make members public/protected/private where necessary) and change the visibility level of the class itself to internal. So I might have a few classes that look like this: internal interface IMyItem { ItemSet AddTo(ItemSet set); } internal class _SmallItem : IMyItem { private readonly /* parameters */; public _SmallItem(/* small item parameters */) { /* ... */ } public ItemSet AddTo(ItemSet set) { /* ... */ } } internal abstract class _CompositeItem: IMyItem { private readonly /* parameters */; public _CompositeItem(/* composite item parameters */) { /* ... */ } public abstract object UsefulInformation { get; } protected void HelperMethod(/* parameters */) { /* ... */ } } internal class _BigItem : _CompositeItem { private readonly /* parameters */; public _BigItem(/* big item parameters */) { /* ... */ } public override object UsefulInformation { get { /* ... */ } } public ItemSet AddTo(ItemSet set) { /* ... */ } } In another generated class (part of a parser/scanner), there is a structure that contains fields for all possible values it can represent. The class generated is internal too but I have control over the visibility of the members and decided to make them internal as well. internal partial struct ValueType { internal string String; internal ItemSet ItemSet; internal IMyItem MyItem; } internal class TokenValue { internal static int EQ(ItemSetScanner scanner) { /* ... */ } internal static int NAME(ItemSetScanner scanner, string value) { /* ... */ } internal static int VALUE(ItemSetScanner scanner, string value) { /* ... */ } //... } To me, this feels odd because the first set of classes, I didn't necessarily have to make some members public, they very well could have been made internal. internal members of an internal type can only be accessed internally anyway so why make them public? I just don't like the idea that the way I write my classes has to change drastically (i.e., change all uses of public to internal) just because the class is internal. Any thoughts on what I should do here? It makes sense to me that I might want to make some members of a class declared public, internal. But it's less clear to me when the class is declared internal.

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  • Software emulated OpenGL with higher version than my graphics card supports

    - by leemes
    I have an Intel GMA 950 chipset in my netbook. I want to learn how to write OpenGL shader programs with this fantastic tutorial and therefore need OpenGL 3.3. Sadly, my graphics card only supports OpenGL 1.4. I think that MESA can emulate OpenGL in software, so I'm wondering if it can emulate OpenGL 3.3 without any hardware accelleration (performance is very much no problem, since this is only for learning and testing puroses). Is there any possibility to do this?

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  • How can i enable my bluetooth and set-up its adapter config in my Ideapad S100

    - by RADKEL05
    I installed Ubuntu 12.04 in my Ideapad S100 it look seem perfect after I installed it, but when i tried to connect my phone via bluetooth, i cannot enable the slide button in the Bluetooth setting and it keeps returning back to "OFF" and the visible button is also in Disable mode. I already tried other solution like installing Blueman, re-write code such as rfkill bluetooth and this echo disable /proc/acpi/ibm/bluetooth. It still doesn't work at all, and regarding to my Wi-Fi i don't have any issue on it.

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  • How to mount a drive for other user than root?

    - by Ondra Žižka
    I've attached a SSD disk though USB. Then: sudo su - mkdir /mnt/hx chown ondra /mnt/hx mount /dev/sdb1 /mnt/hx # It's FAT32 now, but was the same with EXT4 The last command changes dir owner to root. Whenever I create a file in the root dir, I need to be root and root is the owner. Can I set different user as owner of the mounted dir? Or, simply said, ensure that user XY can freely read/write on the drive.

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  • no wifi after grub 2 crash

    - by Omu
    on ubuntu 10.10 I used StartupManager to set windows 7 as the default boot, also chosen the 1024x768 resolution, 16 bit, time: 3sec, and checked "show splash screen". after the restart there was no GRUB menu at all, windows 7 booted, and in windows the clock was 0:03 instead of 10:03, also the wifi doesn't sees any connections anymore I reinstalled ubuntu 10.10 so the GRUB menu is back, changed the clock back from BIOS, but my wifi doesn't sees any connections in windows nor in ubuntu (I write this from another computer)

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  • How to get the blocks seen by the player?

    - by m4tx
    I'm writing a Minecraft-like game using Ogre engine and I have a problem. I must optimize my game, because when I try draw 10000 blocks, I have 2 FPS... So, I got the idea that blocks display of the plane and to hide the invisible blocks. But I have a problem - how do I know which blocks at a time are visible to the player? And - if you know of other optimization methods for such a game, write what and how to use them in Ogre.

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  • zfs raidz1-0 corrupted data, all disk are online

    - by gkcr2d2
    my zfs pool "datas" is unavailable but all my disk are online, Do you know how the problem can be fixed? Thank you for your help. root@oxygen:~# zpool status pool: datas state: UNAVAIL scan: none requested config: NAME STATE READ WRITE CKSUM datas UNAVAIL 0 0 0 insufficient replicas raidz1-0 UNAVAIL 0 0 0 corrupted data scsi-SATA_ST3000DM001-9YN_W1F0LBVX ONLINE 0 0 0 scsi-SATA_ST3000DM001-9YN_W1F0KYX9 ONLINE 0 0 0 scsi-SATA_ST3000DM001-9YN_W1F0LCC8 ONLINE 0 0 0 scsi-SATA_ST3000DM001-9YN_W1F0LBXZ ONLINE 0 0 0

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  • Large files in SharePoint 2010

    - by Sahil Malik
    SharePoint 2010 Training: more information Hoooorayy! My latest code-mag article is finally online. This is an article I’ve been wanting to write for a while now – there is just so much goo in the world around large file management in SharePoint. So I thought an article that sums up the things you need to consider for large file management projects in SharePoint was in order. Anyway, here is the article, enjoy Read full article ....

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  • What is the best method to start understanding BIG project source code? [closed]

    - by Mr.32
    Possible Duplicate: How do you dive into large code bases? Sometimes before developing new products we need to understand some existing products or existing source code. Sometimes to write another small module of that big project we need to understand that big source code. In our case we need to study and understand a project with lots of files and folders. What is the easiest and most comfortable way to do it ? (especially for C and C++ and under Linux)

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  • Dual Frame Buffer on Ubuntu 12.04 Intel HD Graphics 4600 i7-4770

    - by user3692512
    I have 2 monitors connected to the PC, one in HDMI, one in DVI. I have Intel integrated graphics HD4600 Now as far my understanding, both the monitors is connected at the same framebuffer /dev/fb0 How can I detach them and create 2 frame buffers at startup, so that I can directly write to the second monitor, by writing on the /dev/fb1, and not hamper the /dev/fb0, so that x-server can run normally on that?

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