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• When is the right time to join open source project for programmer?

  - by Mahesh

  Most of the newcomers in programming start with basic projects to start with programming. Most of the C++ progammers spend some time with puzzles and contests but this is not always helpful. Sometimes you've to spend some time on real projects. Starting your own open source project could be a problem in self-learning for newbie cause of lack of mentors and peers who can't look at your code and give suggestions. Open source projects can solve this problem, some projects could be best suited for new programmers. Besides everybody is newbie at some point. So i'll try and make this question a bit from beginners perspective. I tried few questions on stack overflow before asking this like How do i join & Bare minimum you need and how to get involved with open source and what level of programming etc. But this is not helping me when it comes to self-evaluating with skills. How to find that out ? How can i check what it takes to join open source project and am i really that comfortable with huge source code etc. My question is when to consider yourself comfortable joining open source programming ? I mean how will you test yourself that you're ready to take burden of big/small projects of open source ? how will you test yourself to see if you could work with version control/other programmers/tight schedule etc ?

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• How to restore default iPod playlists on Amarok?

  - by obvio171

  I wanted to "reset" the collection on my iPod and ended up accidentally deleting, through Amarok, all the playlists, including the default ones like "Most Played" and "Highest Rated". Since these are dynamic playlists with a special meaning for iPod, I don't think creating new, normal playlists with the same name will bring their special behavior back. How do I restore them with the same dynamic functionality? Is there a way to do that on Amarok? Rhythmbox? GTKPod? Command line? P.S.: not entirely sure what the policy about iPod questions are, but this one in particular seems to me to be very computer-related because, although it's about interfacing with a device, everything has to be done on my computer, using standard PC libraries/programs, etc. If it's still off-topic, please point me to where I could post it.

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• What tools and knowledge do I need to create an application which generates bespoke automated e-mails? [on hold]

  - by Seraphina

  I'd like some suggestions as to how to best go about creating an application which can generate bespoke automated e-mails- i.e. send a personalized reply to a particular individual, interpreting the context of the message as intelligently as possible... (This is perhaps too big a question to be under one title?) What would be a good starting point? What concepts do I need to know? I'd imagine that the program needs to be able trawl through e-mails as and when they come in, and search for keywords in e-mail content, in order to write an appropriate reply. So there needs to be some form of automated response embedded in the code. Machine learning and databases come to mind here, as I'm aware that google incorporates machine learning already in gmail etc. It is quite tricky to google the above topic, and find the perfect tutorial. But there are some interesting articles and papers out there: Machine Learning in Automated Text Categorization (2002) by Fabrizio Sebastiani , Consiglio Nazionale Delle Ricerche However, this is not exactly a quick start guide. I intend to add to this question, and no doubt other questions will spark off this one. I look forward to suggestions.

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• MVC: Nasty __o not declared

  - by xamlnotes

  I ran into this little error with MVC where a bunch of errors showed up about  __o  not declared. This was driving me nuts. Then I ran across this link that solved it. http://stackoverflow.com/questions/750902/how-do-i-get-rid-of-o-is-not-declared So, the solution is to put this into the top of the page like VS does for your site.master. <%-- The following line works around an ASP.NET compiler warning --%> <%: ""%> But what about other pages? Lets say you have a view that’s using your site master and that view is throwing this error. Just add the items into the content section where the error occurs like so: <asp:Content ID="indexContent" ContentPlaceHolderID="MainContent" runat="server"> <%-- The following line works around an ASP.NET compiler warning --%> <%: ""%>   Then add the rest of your code. That seems to fix it and its pretty simple too.

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• How can one-handed work in Ubuntu be eased?

  - by N.N.

  My right hand is temporarily immobilized and I would like to do some minor general work on my computer. Mostly web browsing, mailing and file and directory browsing and editing. For this I currently use Firefox, Thunderbird, Nautilus and the GNOME terminal (I have already asked a specific question about Emacs). Are there ways to ease such, or any other general, one-handed work in Ubuntu? I have found http://stackoverflow.com/questions/2391805/how-can-i-remain-productive-with-one-hand-completely-immobilized but that is not exactly what I am asking for. I want to ease whatever little time spent one-handed in Ubuntu and this is also interesting for situations where there is no injury involved, such as when one hand is occupied. I do realize I should avoid unnecessary strain. The main thing that is much slower one-handed is writing. Since I am only temporarily immobilized it seems to make no sense learn a new keyboard layout. I would be surprised if I managed to learn and become more effective with a new keyboard layout (than one-handed QWERTY) before I can use my other hand again. What I have already found: Sticky keys for making it easier to enter keyboard commands. When writing one-handed there are more cases of where it is useful to paste in phrases rather than to reenter them. It is easier to use Super+S rather than CtrlAlt+arrow keys to switch work space.

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• Changing wallpaper depending on time of day via script or batch file?

  - by Patrick

  I want to have 2 different wallpapers that change according to time of day (6 and 22 hours respectively) and only want to display the night one after 22 hours and the day one only after 6 hours and until 22 hours. I didn't find a program that can do this after a standby, so I thought it should be easy to realize with the task scheduler running a script. Now the question is not only how to realize such a script, but also if the script should include the time checking or the task scheduler. I'm not sure what would work better with long times of the PC being in standby. I tried a few scripts already from similar questions and hoped I could modify to them to my needs, but they didn't work at all. Anyone able to help me? TIA.

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• What do light purple color mean in uTorrent

  - by blasteralfred

  I run uTorrent 3.1.2 in my Windows 7 PC. When I download one file, I see some purple colored lines under Files Tab Pieces. Below is an image of what I am telling (little resized); I think that the light green color indicates downloaded parts. But I have no idea about purple lines. The file is a streamable mp3 file. The connection speed is very low, about 5KB/s down and 1KB/s up. The done file size is not progressing in a smooth way (usually changes in KB are visible), it stays as it is for sometime and then changes to a size (changes in MB), and again the same thing. Questions: Why does this happen? What does the purple color mean? Thank you.

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• Why obfuscating a serial number of a device? What is the risk?

  - by Horst Walter

  In one of my xx.stackexchange questions I've got an answer, in which the user has obfuscated his disk's SN (serial number). Recently I have seen this in several photos as well, the SN was blurred out. I' am just curious, because I have never paid attention to this. What could be the potential risk in publishing a device's SN? I do see some sense when it comes to a MAC address, OK, this could be used for tracking. But a SN of a disk, iPad, whatsoever? Maybe there is an important reason for not publishing it, which I haven't seen so far.

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• Java University Pre-Conference Training Is Back

  - by Tori Wieldt

  The Java University pre-conference training will be back again this year at JavaOne!  Java University gives conference attendees a chance to get even more from your conference experience by giving you the option to attend a full day of in-depth Java training delivered by the experts on the Sunday prior to the conference.  We are working to make this event even better in 2012 and want to find out which technical sessions you would like to see offered.  Web Services? Developing Rich Client Applications with Java SE 7? Developing Portable Java EE Applications with the Enterprise JavaBeans 3.1 API and Java Persistence API 2.0? Performance Tuning?  There are so many hot topics to choose from we need your help to decide.  Get a preview of the full list of sessions we are considering and tell us which ones pique your interest most in our short survey.  There are only four questions so it shouldn’t take you much time and it will help make for a better event in 2012.

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• X server not starting up after new kernel compilation

  - by tech_learner

  I have compiled the Kernel on my 64-bit Debian XPS Studio 1340 Dell system. srikanth@debian:~ - 05:40:52 PM - $ uname -a Linux debian 2.6.32-5-amd64 #1 SMP Thu Mar 22 17:26:33 UTC 2012 x86_64 GNU/Linux Kernel version that I have used and compiled from kernel.org is 2.6.35.13 I have nvidia installed on old kernel. I got the old config and I used the same config to compile the new kernel. Everything went well and I got two debian packages ( image and headers ) which I have installed on my system. When I select the new kernel on the boot menu and I go into it, the X server is not starting up possibly because I have to "rebuild" ( not sure how to do that ) according to this link: http://www.linuxquestions.org/questions/slackware-14/x-server-not-starting-after-kernel-compilation-605265/ Can you suggest how to do the rebuild on nvidia module so that I can start x ( without seeing any blank screen or error saying nvidia module is missing ) ? PS: The link that I have used to compile the kernel is https://help.ubuntu.com/community/Kernel/Compile#Alternate_Build_Method:_The_Old-Fashioned_Debian_Way

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• Wireless on ThinkPad Edge E420s

  - by user21820

  I have installed Kubuntu 11.04 (Natty) on my ThinkPad Edge E420 laptop. Unfortunately, the wireless is not working. I have got Windows 7 installed besides Kubuntu, and wireless is working with no problems there, so it has to be problem of the OS. What I tried: I installed the official driver from Realtek RLT8192CE. After reboot the wireless didn't work, but at least the system was able to detect that it is present in the system. However, after executing lscpi -v, under the card's details there was a line "Currently used driver" which said "r8169". Why is this? I did all of this according to a manual on http://www.php-architect.com/blog/2010/05/01/getting-wireless-to-work-on-lenovo-thinkpad-t400-with-ubuntu-10-4-lucid/. There a meany other similar ones, but don't work for me either. My questions are: 1) Is there any way to get this fixed? If yes, how to do so? 2) Do you think OpenSUSE (or any other distro) is better distribution concerning such hardware issues, so should I give it a try? If yes, which distro gives me the best chance?

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• Now Released: "Oracle WebLogic Server 12c: Administration I" Certification Exam (1Z0-133)

  - by Brandye Barrington

  Oracle Certification is pleased to announce the production release of the Oracle WebLogic Server 12c: Administration I Certification Exam (1Z0-133). Passing this exam results in the "Oracle Certified Associate (OCA) - Oracle WebLogic Server 12c Administrator" certification. Oracle WebLogic Server sets the industry standard for Java application servers, and the "Oracle Certified Associate (OCA) - Oracle WebLogic Server 12c Administrator" certification sets the standard for WLS administrators. Obtaining this certification proves that you have the skills to set up server environments, tune performance and troubleshoot with confidence and raises the bar for your peers.  While training is not required for certification, the Oracle WebLogic Server 12c: Administration I course from Oracle University, can expedite you towards your certification - helping you gain the skills and knowledge to increase the performance and scalability of your organization’s applications and services with the #1 application server. Becoming certified gives you a competitive edge through proven expertise. The Oracle WebLogic Server 12c: Administration I exam (1Z0-133) is now available in production. Get all preparation details, including exam objectives, number of questions, time allotments, and pricing on the Oracle Certification website. Register now for exam 1Z0-133 at www.pearsonvue.com/oracle. QUICK LINKS: Certification Track: Oracle Certified Associate (OCA) - Oracle WebLogic Server 12c Administrator Certification Exam: Oracle WebLogic Server 12c: Administration I Certification Exam (1Z0-133) Recommended Training: Oracle WebLogic Server 12c: Administration I Register Now: Pearson VUE

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• HUGE MAC FILTER and scripting

  - by user195917

  I make an dhcp server on CentOS, and i apply a mac filter for my clients. Now, with a small number of clients (max 10) ,is not that hard, but what I will do with 2000 clients? My idea was to create a list (ex. "macfilter.lst") and this list, to be updated after a database. I have tow questions. First: How do i create a filter in IPTABLES that takes info`s from a file (file hosted on server) Second: Any idea about how to write a script, that update a file after a database?? Thanks so much for your help.

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• Is having a single `IndexWriter` instance in Lucene a good idea?

  - by Dragos

  I am trying to understand how Lucene should be used. From what I have read, creating an IndexReader is costly, so using a Search Manager shoulg be the right choice. However, a SearchManager should be produced by a NRTManager(which, by the way, should replace the IndexWriter for every add or delete operation performed). But in order to have a NRTManager, I should first have an IndexWriter, and here comes my problem. The documentation says: an IndexWriter is thread-safe the constructor of this class takes a Directory object, so it seems creating an instace should be costly(as in the case of an IndexReader) all changes are buffered and flushed periodically(so they seem to encourage using a single instance) but: the changes, although flushed will only be visible after commit or close after finished making updates(add/delete), the instance should be closed I also found this: http://stackoverflow.com/questions/5374419/forgot-to-close-the-lucene-indexwriter-after-adding-documents-to-the-index where it is said that not closing a writer might ruin everything So what am I really supposed to do? Is having a single IndexWriter instance a good idea (make only commit and never close it)? EDIT: What is more, if I use NRTManager, how can I make acommit`? Is it even possible?

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• Can I remove a RAR file's (known) password without recompressing the archive?

  - by Abluescarab

  Long title. Anyway, I haven't been able to find an answer to this question. I know the password to the RAR file, I locked it myself, but now all I want to do is remove the password because it's too much of a pain in the butt to type it in every time. Is there a way to do this in WinRAR or an equivalent program? The only thing I knew to do was to extract it, then create a new RAR without the password. It's not a life-or-death issue, but it would be nice to know. Thanks for your time! EDIT: I just saw a bunch of related questions that appear to ask the same thing. The only solution I saw was using a DOS command to yadda yadda yadda. Here it is: How to remove password protection from compressed files Is there an easier way? Thanks again!

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• nginx: URL rewrites and performance

  - by j0nes

  I have a website where I need to change the URL structure. The old URLs look like /olddir/part1_de.htm, the new ones will look like /newdir/sub/category/anotherpage.htm. There are a lot of URL rewrites I need to do, I assume about 500 distinct rewrites in the end. As my website gets quite a lot of traffic, my main concern is about performance at the moment. My questions are: I assume that for each request, the rewrites block will be parsed and the regex will be evaluated. Am I right? Will there be a performance penalty if I use these rewrites? Can nginx handle this? Are there any "best practices" to follow when doing a lot of rewrites?

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• Is Your Company Social on the Inside?

  - by Mike Stiles

  As we talk about the extension of social from an outbound-facing marketing tool to a platform that will reach across the entire enterprise, servicing multiple functions of that enterprise, it might be time to take a look at how social can be effectively employed for internal communications. Remember the printed company newsletter? Yeah, nobody reads it. Remember the emailed company newsletter? Yeah, nobody reads it. Why not? Shouldn’t your employees care about the company more than anything else in life and be voraciously hungry for any information related to it? The more realistic prospect is that a company’s employees don’t behave much differently at work where information is concerned than they do in their personal lives. They “tune in” to information that’s immediately relevant to them, that peaks their interest, and/or that’s presented in a visually engaging way. That currently makes an internal social platform the most ideal way to communicate within the organization. It not only facilitates more immediate, more targeted (and thus more relevant) messaging from the company out to employees, it sets a stage for employees to communicate with each other and efficiently get answers to questions from peers. It’s a collaboration tool on steroids. If you build such an internal social portal and you do it right, will employees use it? Considering social media has officially been declared more addictive than cigarettes, booze and sex…probably. But what does it mean to do an internal social platform “right”? The bar has been set pretty high. Your employees are used to Twitter and Facebook, and would roll their eyes at anything less simple or harder to navigate than those. All the Facebook best practices would apply to your internal social as well, including the importance of managing posting frequency, using photos and video, moderation & response, etc. And don’t worry, you won’t be the first to jump in. WPP's global digital agency Possible has its own social network called Colab. Nestle has “The Nest.” Red Robin’s got one. I myself got an in-depth look at McGraw-Hill’s internal social platform at Blogwell NYC. Some of these companies are building their own platforms, others are buying them off the shelf or customizing readymade solutions. But you won’t be the last either. Prescient Digital Media and the IABC learned 39% of companies don’t offer employees any social tools. Not a social network, not discussion forums, not even IM. And a great many continue to ban the use of Facebook and Twitter on the premises. That’s pretty astonishing since social has become as essential a modern day communications tool as the telephone. But such holdouts will pay a big price for being mired in fear while competitors exploit social connections unchallenged. Fish where the fish are. If social has become the way people communicate and take in information, let that be the way communication is trafficked in the organization.

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• Packaging MATLAB (or, more generally, a large binary, proprietary piece of software)

  - by nfirvine

  I'm trying to package MATLAB for internal distribution, but this could apply to any piece of software with the same architecture. In fact, I'm packaging multiple releases of MATLAB to be installed concurrently. Key things Very large installation size (~4 GB) Composed of a core, and several plugins (toolboxes) Initially, I created a single "source" package (matlab2011b) that builds several .debs (mainly matlab2011b-core and matlab2011b-toolbox-* for each toolbox). The control file is just the standard all: dh $@ There is no Makefile; only copying files. I use a number of debian/*.install files to specify files to copy from a copy of an installation to /usr/lib/. The problem is, every time I build the thing (say, to make a correction to the core package), it recopies every file listed in the *.install file to e.g debian/$packagename/usr/ (the build phase), and then has to bundle that into a .deb file. It takes a long time, on the order of hours, and is doing a lot of extra work. So my questions are: Can you make dh_install do a hardlink copy (like cp -l) to save time? (AFAICT from the man page, no.) Maybe I should just get it to do this in the Makefile? (That's gonna b e big Makefile.) Can you make debuild only rebuild .debs that need rebuilding? Or specify which .debs to rebuild? Is my approach completely stupid? Should I break each of the toolboxes into its own source package too? (I'll have to do some silly templating or something, because there's hundreds of them. :/)

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• DVD stops working in windows 7 64 bit

  - by Skadlig

  I have the same problem as described in this question: http://superuser.com/questions/105928/dvd-cd-rom-drives-stop-working-in-windows-7 I know I have got some games that are using starforce and/or securerom. What I don't have is the upper and lower filter in my registry tag. Oh and a reboot temporarily fixes my problem. After a random time though it goes missing again. I found a Microsoft knowledge base article regarding this but since I didn't have the filter tags they couldn't help me. Does anyone have any other tips bar removing the despicable drm:s? I would like to go on playing my games so that is not really an option for me.

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• ideal memory configuration 4 bank, ddr3, AM3+ FX - 1 vs 2 vs 4 dimms?

  - by TardisGuy

  Ok, so ive been looking around, trying to learn and understand the way that ram works. Ive gotten one answer that said "The addressing is best for 2 sticks, and when you use 4; it slows down" Another answer said something like: Theres bank/channel interleave that makes the memory read like one stick Also I read something about the memory density also being a factor. I dug further and found out that theres a higher speed limit on my board for 2 sticks vs 4, so now im trying to put an image in my head of how and why, and... pfft. Can anyone explain, or recommend a resource that would answer these questions?

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• Ubuntu One - Files API - Cloud - More detailed info somehwere?

  - by Brian McCavour

  I am just starting on a mobile app for Ubuntu One, and I'm reviewing the info at https://one.ubuntu.com/developer/files/store_files/cloud I find the information a bit lacking though. It's a nice reference, but for someone not familiar with it, I had to goggle search to find out what a "volume" was exactly (its kind of obvious, but never hurts to know the specifics) There's also things like: GET /api/file_storage/v1/volumes Return a JSON list of Volume Representations, one for each volume. A volume is a synced folder, or the Ubuntu One folder, owned by the user. Note that all volume paths begin with ~.: ... but there's no such thing as a JSON "list". Does it mean array ? And other things... So I was wondering if here existed another page with more detailed information. Maybe some sample request / responses or something? I could just write a little proof of concept app to answer some of these questions... but I prefer not to unless I have to. Thanks

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• Trade In, Trade Up Promotion: SPARC Consolidation Now Through May 31st

  - by swalker

  Dear Partner, Installed Base Business (IBB) technology refresh is one of the most important activities for Oracle, for you and for your customers. It allows your existing customers to benefit from the most up-to-date, best-of-breed Oracle products. And it’s an exciting time to perform a technology refresh: a new SPARC promotion is available now, closing 31st May 2012. Customers trading in older SPARC systems and upgrading to a new SPARC SuperCluster T4-4 or SPARC Enterprise M8000/M9000 can get $4,000 per CPU. Discount is pre-approved and upfront (maximum discounts apply). The major highlights are as follows: Targeted Systems: Upgrade to SPARC M8000, M9000, SuperCluster Qualified installed base upgrade from: All older-generations of SPARC systemsPromotional offer: Trade-in Value: $4K per CPU Pre-approved maximum discount (including trade-in) not to exceed 60% on M8/9000 systems and 25% on SuperCluster No-cost dock-to-dock shipping, and environmentally safe disposal of the returned hardware through Oracle best-of-class recycling processes. Recommendations: We recommend you to take the following actions: As usual, please register your opportunities in OMM When you do so, please make sure you place the following Campaign Names in the “Marketing Initiative” field of OMM: Campaign Name : EMEA_Tech Refresh-IBB Campaign_12H1_Follow Up_O For all the details: Please view rules, and FAQs. For more information, please visit the Promo Partner Site here. For more information on IBB and the Oracle Upgrade Advantage Program (UAP):http://www.oracle.com/us/products/servers-storage/upgrade-advantage-program/index.html http://www.oracle.com/partners/secure/sales/oracle-ibb-program-for-partners-184291.html Contacts: For questions, please contact your favorite Oracle Partner Account Manager.

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• need for tcp fine-tuning on heavily used proxy server

  - by Vijay Gharge

  Hi all, I am using squid like Internet proxy server on RHEL 4 update 6 & 8 with quite heavy load i.e. 8k established connections during peak hour. Without depending much on application provider's expertise I want to achieve maximum o/p from linux. W.r.t. that I have certain questions as following: How to find out if there is scope for further tcp fine-tuning (without exhausting available resources) as the benchmark values given by vendor looks poor! Is there any parameter value that is available from OS / network stack that will show me the results. If at all there is scope, how shall I identify & configure OS tcp stack parameters i.e. using sysctl or any specific parameter Post tuning how shall I clearly measure performance enhancement / degradation ?

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• Web Site Monitoring/Tracking Freeware

  - by jsmith

  I need to be able to track Web Sites visited on a computer and send them to an email address on a daily basis. Keylogger software seems like too much, I want something lightweight that simply monitors websites visited and forwards them on. I was hoping for freeware, but if it's cheap/simple and easy to use I'm willing to pay. I know similar questions have been asked about website traffic monitoring, but it's not quite the same thing, and I can't seem to find an answer to this question anywhere. Thank you ahead of time.

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• Calculation of Milestones/Task list

  - by sugar

  My project manager assigned me a task to estimate the development time for an iPad application. Lets assume that I gave estimation of 15 working days. He thought that the number of days where too many and client needed the changes to the application urgently (as in most of cases). So, he told me: "I am going to assign two developer including you and as per my understandings and experience it won't take more than seven working days." Clarifications I was given the task of estimating development time for an individual. How could I be sure that 2 developers are going to finish it within 7 days? (I am new to team & I hardly know the others abilities) Questions Why do most of project managers / team leaders have understandings like: If one developer requires N days, Then two developers would require N/2 days, Do they think something like developer = s/w production machines? Should a team member (developer, not team lead or any higher post) estimate other developers work? I didn't deny anything in the meeting and didn't said, but what should be the appropriate answer to convince them that N/2 formula that they follow is not correct?

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