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• Given a string of letters from alphabet insert frequency of each character in the string.in O(n) time and O(1) space [on hold]

  - by learner

  Below is my attempt void str_freq(char *str, int len) { char c; int cnt=0; c=str[0]; int i,j=0; for(i=0;i<len;i++) { if(c==str[i]) { cnt++; } else { c = str[i]; // printf(" %d ",cnt); str[j] = str[i-1]; str[j+1] = (char)(((int)'0')+cnt); j++; cnt=0; } } str[j+1]='\0'; printf("%s",str); } int main() { char str[] = "aaabbccccdeffgggg"; int length=strlen(str); str_freq(str,length); } I am getting wrong answer abcdef1 instead of a3b2c4d1e1f2g4. Please let me know where I am going wrong.

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• Help me understand a part of Java Language Specification

  - by Software Engeneering Learner

  I'm reading part 17.2.1 of Java language specification: http://docs.oracle.com/javase/specs/jls/se7/html/jls-17.html#jls-17.2.1 I won't copy a text, it's too long, but I would like to know, why for third step of sequence they're saying that If thread t was removed from m's wait set in step 2 due to an interrupt Thread couldn't get to step 2 it wasn't removed from wait set, because it written for the step 1: Thread t does not execute any further instructions until it has been removed from m's wait set Thus thread can't be removed from wait set in step 2 whatever it's due to, because it was already removed. Please help me understand this.

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• solve a partition misalignment?

  - by learner

  I have a new Dell XPS laptop which had Windows 7 installed in it. It also had a default extra partition for "Dell Utility". I installed Ubuntu in it on an Extended Partition along with windows and specified the logical partitions myself (for /,/home and swap). Now when I open Disk Utility , it shows this "Partition misaligned by 512 bytes" error for the Dell Utility partition and "Partition misaligned by 1024 bytes" for the entire Extended partition where Ubuntu is installed. Deleting the extended partition and re-installing Ubuntu may solve the problem of misalignment in the extended partition. But how about the Dell Utility partition? If I re-install Windows 7 Dell Utility wouldn't be a part of the re-install. So that may not solve it either. How do I fix this? Note: The extended partition I made contains an NTFS logical partition for holding data accessible by both OSes(basically a personal data partition). EDIT: I deleted all my Ubuntu partitions and re-installed Ubuntu like before,this time making them partitions with GParted via LiveCD. Now the only problem is that there is a misalignment in the Dell Utility partition. The other misalignment got fixed. Now how do I get rid of that issue?

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• The Ubuntu Advantage Service right for my non-profit?

  - by Robert

  My small 5 computer office currently runs on Ubuntu. 2 of the desktops run Windows7 in Sun Virtualbox software, and are used for Quickbooks. I am going off to college, and I am looking for a paid tech support solution to replace my IT position. I have an approx $300/mth budget, and I am wiling to discuss higher rates. Everyone in the office is currently comfortable with regular desktop usage, but I am handling all of the software installation and updates. I was hoping to get a total support package for all of their tech related questions, but I cannot find any services which will support linux. Is the Ubuntu Advantage Service something which can take my place? They would mostly need network help, printer help, and an occasional software compatibly troubleshooting session. If this is not a solution, does anyone know of a tech support forum/hotline which would cover all of this? Thank you for reading.

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• System Settings -> Additional Drivers is empty. How then do I install proprietary drivers?

  - by learner

  I use Ubuntu 12.04. My graphics card is Geforce GT540M. I opened Synaptic Package manager and installed the following: nvidia-common nvidia-settings-update nvidia-common nvidia-current nvidia-current-updates The following were installed before(when unity launcher looked normal): jockey-common psensor nvidia-settings jockey-gtk xserver-xorg-video-nouveau My intention was to use the right Nvidia drivers. But apparently it didn't rightly install the drivers and now I have Unity 2D running!

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• How are you coping with Ubuntu's Unity app launcher? (It auto-hides, can't minimize apps)

  - by Bad Learner

  [Firstly, let me tell you that this cannot be subjective in anyway, as I think at least Ubuntu beginners will have these questions boggling in their mind; and yes, this is a question that has a definite answer - - so, I am completely within the rules.] Okay, coming to the point, I see that Ubuntu uses Unity since v10.xx (netbook edition?) and carried the same to v11.04 & v11.10. As someone who's stuck to Windows for all these years, it's somewhat difficult to cope with Ubuntu's Unity, for the following reasons: [1] The Unity app launcher (to the screen's left) auto-hides when a window is maximized. [2]- And once launched, apps cannot be minimized by clicking the app's icon in the launcher. I have to go to the top-left of the screen and click the "_" button. I do know I can fix these issues by installing some configuration tool. But the thing is, if that's how it's meant to work, Canonical/Ubuntu would have designed it that way. But they didn't. Why? w.r.t above points [1], [2]: [1] EDITED: So, does it mean, it's good to work without maximizing the windows? Because if I maximize the window, the app launcher hides. And I need to hover the mouse to the left of the screen, wait a bit (even if it's a sec or even less, I can still feel the lag), and then click on the next app icon in the launcher to switch to it. I do know, I can use Alt+TAB to switch, but I am not sure which window comes next. This, I feel, isn't productive. Also, this makes me feel, Ubuntu is designed for large screens (it's nice on my 1920x1080p screen), because I can have two windows side-by-side or something like that on a large screen. This is not possible on smaller screens. [2]- Being able to minimize an application's window by clicking on its icon in the launcher (just like it works on Windows & probably elsewhere) would have been great, rather than having to go to the top-left and clicking the _ (minimize) button which brings up the app launcher itself (from hiding) most of the time. It's too tiring to have these small issues in the UI. I really would like to know how you are coping with these issues the way they are?

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• Design: How to model / where to store relational data between classes

  - by Walker

  I'm trying to figure out the best design here, and I can see multiple approaches, but none that seems "right." There are three relevant classes here: Base, TradingPost, and Resource. Each Base has a TradingPost which can offer various Resources depending on the Base's tech level. Where is the right place to store the minimum tech level a base must possess to offer any given resource? A database seems like overkill. Putting it in each subclass of Resource seems wrong--that's not an intrinsic property of the Resource. Do I have a mediating class, and if so, how does it work? It's important that I not be duplicating code; that I have one place where I set the required tech level for a given item. Essentially, where does this data belong? P.S. Feel free to change the title; I struggled to come up with one that fits.

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• Display turns off when watching videos (then video starts to lag), how to fix it?

  - by Bad Learner

  Okay, here's the thing - - On my Ubuntu 11.10 64-bit installation, I have the display set to turn off automatically after 3 minutes of inactivity. There are two problems now: the display turns off even when I am watching videos. But I don't want to keep fiddling my mouse or keyboard when I am watching a movie. Okay, like I said above, the display turns off, then I move the mouse a bit each time, and the display turns back on. But now, the video doesn't play properly, it lags. A lot actually. Are these issues common? Can these be fixed?

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• Places to share my new blog entry? [closed]

  - by TomasAlabes

  I started yesterday a tech blog called devhike and as my first entry I explained a palette behaviour made with RaphaelJS. I wanted to share the entry the tech people around the world, to see if they like it, find it useful, etc. I submitted the link to my post in dzone.com and hackernews which are the places from where I like to read tech articles, but I feel there should be other places where I could post my blog or entry too. If not, I feel my blog will never be read. Do you know any places or ways to be read?

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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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• Is there any complications or side effects for changing final field access/visibility modifier from private to protected?

  - by Software Engeneering Learner

  I have a private final field in one class and then I want to address that field in a subclass. I want to change field access/visibility modifier from private to protected, so I don't have to call getField() method from subclass and I can instead address that field directly (which is more clear and cohessive). Will there be any side effects or complications if I change private to protected for a final field? UPDATE: from logical point of view, it's obvious that descendant should be able to directly access all predecessor fields, right? But there are certain constraints that are imposed on private final fields by JVM, like 100% initialization guarantee after construction phase(useful for concurrency) and so on. So I would like to know, by changing from private to protected, won't that or any other constraints be compromised?

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• I spy a Live Framework portal

  - by jamiet

  Those that have followed my blogs for a while may know that I have a slightly banal interest in Windows Live and, more specifically, the Live Services developer platform'; if that doesn’t sound interesting to you then stop reading now. My interest mainly stems from the Live Mesh technology that was announced a couple of years ago and the data synchronisation platform API that underpins it; that platform is called the Live Framework or LiveFX for short. At the Professional Developer’s Conference (PDC) 2008 Microsoft made LiveFX available to the public as a Tech Preview and I spent some time learning to use it and also built a few test apps on it too. In August 2009 an announcement came that that tech preview was getting shut down: "At the Professional Developer Conference 2008, we gave the developer community access to the technical preview of the Live Framework. The Live Framework is core to our vision of providing you with a consistent programming interface. Now we are working to integrate existing services, controls and the Live Framework into the next release of Windows Live. Your feedback continues to help us build the best possible offerings for Windows Live users, for you and for your customers. " Since then news on LiveFX has disappeared save for a throwaway session at PDC09 and I was hoping that news was going to appear at this week’s MIX conference but nothing was forthcoming. Instead though today I stumbled upon an unannounced portal for future LiveFX applications on Microsoft’s Azure portal at http://live.azure.com. Check it out: I consider this to be very good news. This Azure portal was built after the LiveFX tech preview was decommissioned so seeing Live Services existing so prominently alongside Microsoft’s other cloud efforts like Windows Azure and SQL Azure vindicates my early investment in the platform and gives me hope that we’re going to see something get released very very soon. I believe that the potential uses for this platform are extremely compelling and I’m looking forward to trying some out in the near future. I am also expecting LiveFX to have a heavy dependency on the OData protocol that I talked about yesterday in my post OData.org updated - gives clues about future sql azure enhancements so you can tell where my interest in that stems from. In case you’re wondering the projects that you see listed above (Basic List Sample, JT-proj etc…) are projects that I built on the old Tech Preview platform so clearly that stuff has not gone for good which is also good news; not just because it means I’ll have access to the code I wrote before but I also assume it means that LiveFX won’t have changed much since its tech preview incarnation. I know there are other LiveFX buffs out there and hopefully this news reaches some of them. If you are one of them the please put a comment below and let me know your thoughts! @Jamiet Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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• SQLAuthority News – Community Service and Public Speaking Engagements

  - by pinaldave

  Today is the last day of the year and I was going over my memories for year 2010. Almost all of them are good and I feel for sure better person in terms of knowledge, nature and overall human being. Looking back at the year, it is very satisfying as I was able to go out in public and help community out at various capacity. Thought, most of the time my contribution was as speaker, many times, I have reached out and helped organized event and worked at any capacity to get the event out. I have taken parts in many TechEds, PASS events, Virtual Tech Days, Various Community Events around the Globe and my contribution is not limited to my country only. Overall – I feel good to be part of this wonderful and supportive community. SQLAuthority News – A Successful Community TechDays at Ahmedabad – December 11, 2010 SQLAuthority News – A Successful Performance Tuning Seminar at Pune – Dec 4-5, 2010 SQL SERVER – A Successful Performance Tuning Seminar – Hyderabad – Nov 27-28, 2010 – Next Pune SQLAuthority News – SQLPASS Nov 8-11, 2010-Seattle – An Alternative Look at Experience SQLAuthority News – Statistics and Best Practices – Virtual Tech Days – Nov 22, 2010 SQLAuthority News – SQL Server Performance Optimizations Seminar – Grand Success – Colombo, Sri Lanka – Oct 4 – 5, 2010 SQL SERVER – Visiting Alma Mater – Delivering Session on Database Performance and Career – Nirma Institute of Technology SQLAuthority News – Feedback Received for Virtual Tech Days Sessions on Spatial Database SQLAuthority News – Community Tech Days, Ahmedabad – July 24, 2010 SQLAuthority News – SQL Data Camp, Chennai, July 17, 2010 – A Huge Success SQLAuthority News – 2 Sessions at TechInsight 2010 – June 29 – July 1, 2010 SQLAuthority News – Author Visit – SQL Server 2008 R2 Launch SQLAuthority News – Professional Development and Community SQLAuthority News – TechEd India – April 12-14, 2010 Bangalore – An Unforgettable Experience – An Opportunity of A Lifetime SQLAuthority News – Speaking Sessions at TechEd India – 3 Sessions – 1 Panel Discussion SQLAuthority News – Meeting with Allen Bailochan Tuladhar – An Unlimited Experience SQLAuthority News – Author Visit Review – TechMela Nepal – March 29-30, 2010 SQLAuthority News – Excellent Event – TechEd Sri Lanka – Feb 8, 2010 SQLAuthority News – Hyderabad Techies February Fever Feb 11, 2010 – Indexing for Performance SQLAuthority News – MUGH – Microsoft User Group Hyderabad – Feb 2, 2010 Session Review SQLAuthority News – Ahmedabad Community Tech Days – Jan 30, 2010 – Huge Success For earlier year’s contribution you can check my webpage over here. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: About Me, Pinal Dave, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, SQLAuthority Book Review, SQLAuthority News, T SQL, Technology

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• Windows 7 Desktop/Start Menu Redirection: Server O/S: Windows Server 2003 And Server 2008

  - by Moody Tech

  Hi, I am new here so I am might be asking a question which has already been answered [however I can't see it in the suggested answers above] I manage a network which is split into a parent domain and a child domain. Recently I have been looking at when to migrate to Windows 7. The child domain users [authenticated by the 2008 based (child) domain] get the redirected Desktop [as expected] but not the Start Menu. The parent domain users [authenticated by the 2003 based (parent) domain] get neither desktop nor Start Menu redirected. Does anyone here know how to successfully redirect the properties for these users as desired? Many thanks.

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• How to run a command as admin in MSDos?

  - by tech

  I want to run a dos command in dos prompt, but this dos command is only executed using admin right. So, I can right click the command prompt to run as administrator, but I wanna to run one line of dos command using the admin right, can I run dos command in dos prompt like sudo in DOS cmd? thz u.

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• Xbox360 Universal Media Remote - out of sync?

  - by Traveling Tech Guy

  Hi, I have the Universal Media Remote from Microsoft, which was included with my HD-DVD package. I've been using it for over a year to watch videos/DVDs on my Xbox360 and it saved me the hassle of navigating with the game controller (which turns itself off every 5 minutes).All of a sudden (it didn't fall or suffer any severe trauma), it does not communicate with the Xbox anymore: it is on, I replaced batteries several times, but the Xbox does not respond to commands. The TV does - volume, channels, etc. - but I need the Xbox functionality.As far as I can see, there's no way to sync the remote with the Xbox - it lacks that small sync button that the game controllers have.I called Microsoft Support and spoke for an hour to someone who, I guess didn't know what to do at all. Bottom line - since it's been over a year, they won't fix/replace it - I have to get a new one.Before I do (if I do), I need to know if there's anything I can do with the existing remote, and will I have the same problem with a new one (i.e. the problem is with the Xbox itself)? Thanks!

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• Moving MySQL directory on an Amazon EC2 machine

  - by Traveling Tech Guy

  I'm trying to have MySQL point to a directory on an EBS volume I mounted on my EC2 machine. I took th following steps: Stopped MySQL (/etc/init.d/mysqld stop) - successful Created a MySQL directory on my volume, mounted on /vol (mkdir /vol/mysql) Copied the contents of /var/lib/mysql to /vol/mysql (cp -R /var/lib/mysql /vol/mysql) Chanded the owner and group of that directory to match the original (chown -R mysql:mysql /vol/mysql) - after this step, the 2 directories are identical. Edited the /etc/my.cnf file (commented 2 original lines): [mysqld] #datadir=/var/lib/mysql #socket=/var/lib/mysql/mysql.sock datadir=/vol/mysql socket=/vol/mysql/mysql.sock` Started MySQL (/etc/init.d/mysqld start) - FAILED The error file /var/log/mysqld.log contains the following lines: 100205 20:52:54 mysqld started 100205 20:52:54 InnoDB: Started; log sequence number 0 43665 100205 20:52:54 [Note] /usr/libexec/mysqld: ready for connections. Version: '5.0.45' socket: '/vol/mysql/mysql.sock' port: 3306 Source distribution No other errors are available. What am I doing wrong? Where can I find the error/s encountered by MySql? If I restore the original lines, MySQL starts, leading me to believe it may be a permissions issue - but permissions are the same for both directories? Thanks!

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• Install Nod32 antivirus silently?

  - by IT Tech

  Hi guys/gals, I was hoping that I could find someone on here that may know if it is possible to install Nod32 on a client PC silently. We have some software that will copy the MSI to the remote PC and run it with any specified parameters. The software needs you to import the license key file and tell it where the server is. Is there any way that these details can be pre specified so the user doesn't have to have any interaction on the remote computer. Many thanks in advance.

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• How can I run this batch file?

  - by tech

  OSQL -S 127.0.0.1 -U sa -P password RESTORE DATABASE DATA FROM DISK = C:\backup\data.dat GO EXIT This is the batch file. but after I run the OSQL -S 127.0.0.1 -U sa -P password, the dos command start with the line 1> After that, the batch cmd can't run. How can I fix this problem? thz.

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• How to convert lots of database file from MSSQL 2000 to MSSQL 2005?

  - by Tech

  Hi all, I am moving the SQL Server from MSSQL 2000 to MSSQL 2005, and I found the article in the web like this: http://www.aspfree.com/c/a/MS-SQL-Server/Moving-Data-from-SQL-Server-2000-to-SQL-Server-2005/ It works, but the problem is, it only move database one by one. Because I have so many database, is there any easy way to do so? or is there provides any batches / untitlty allow me to do so? thz u.

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• What are the quality metrics for RAM?

  - by Hi-Tech KitKat Android

  I have searched RAM and i found there are given some specification for the same capacity RAM, What are the difference and performance comparison between these? Like RAM1 General Brand Transcend Memory Type 2 GB (8 x 128 MB) DDR2 DIMM Memory Standard DDR2-800/PC-6400 Compatible Device PC Pins 240-pin Burst Length 4, 8 Buffered/Unbuffered Unbuffered Memory Memory Clock 400 MHz Technology DDR2 SDRAM Memory CAS Latency 4, 5, 6 RAM 2 General Brand Transcend Memory Type 2 GB (8 x 128 MB) DDR2 DIMM Memory Standard DDR2-667/PC2-5300 Compatible Device PC Pins 240-pin Burst Length 4, 8 Buffered/Unbuffered Unbuffered Memory Memory Clock 333 MHz Technology DDR2 SDRAM Memory CAS Latency 3, 4, 5 RAM3 General Brand Kingston Memory Type 2 GB (64 x 256 MB) 800 MHz DDR2 DIMM Compatible Device PC Pins 240-pin Error Check Non-ECC Buffered/Unbuffered Unbuffered Memory Memory Clock 200 MHz Technology DDR2 SDRAM Memory CAS Latency 6 What are the affect of the following Memory Type(given as 8 x 128 MB) Memory Clock (given in MHz) CAS Latency (given as 4,5,6) my Requirement is 2 GB DDR2 Type Desktop Please help

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• Thinkpad Bluetooth turns itself on upon restart/hibernate

  - by Traveling Tech Guy

  I have a T400 with Windows 7 64bit. About 3 weeks ago, the Lenovo update pushed a Bluetooth update that added a 2.1 driver and device experience. Since then, my bluetooth turns itself on whenever the OS comes up (full restarts as well as waking from hibernation). I can turn it of using the <Fn>+<F5> Radio menu, but it just turns itself on again the next time. If I forget to turn it off, it just eats my battery that much faster.I've been scouring the web and couldn't find similar occurrences. Is this a hardware issue, a BIOS issue (although no reference to BT in any of the BIOS menus), a driver issue or (shudder) a user issue? Thanks for your help.

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• How to convert lots of database file from MSSQL 2000 to MSSQL 2005?

  - by Tech

  Hi all, I am moving the SQL Server from MSSQL 2000 to MSSQL 2005, and I found the article in the web like this: http://www.aspfree.com/c/a/MS-SQL-Server/Moving-Data-from-SQL-Server-2000-to-SQL-Server-2005/ It works, but the problem is, it only move database one by one. Because I have so many database, is there any easy way to do so? or is there provides any batches / untitlty allow me to do so? thz u.

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• How to run a command as administrator in Windows?

  - by tech

  I want to run a console program in Windows, but it required administrative privileges. So, I can right click the command prompt to run as administrator, but I want to use something from the command line to elevate the program. Is there something like sudo in Windows?

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• What's the syntax to add a calendar reminder from Google Command Line?

  - by Traveling Tech Guy

  I've been using googlecl successfully to add events to my calendar. Things like: google calendar add "call Paul tomorrow at 8:30am" work great, and add the appropriate event t the right time. But no reminder is added for the event. I tried: google calendar add "call Paul tomorrow at 8:30am reminder 10 minutes" and other combinations. It just ends up adding the "reminder" instruction to the event description. What's the syntax I should use to add a, let's say, 10 minutes pop-up reminder? Thanks

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