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• building bittorrent client from scratch

  - by Bill

  I'm new to programming. I find reading introductory programming books boring. I think these doesn't teach enough of the problem solving skills that I need. So I decided to build a bitTorrent client. I think I understand to some point how the protocol works. I have also downloaded the source code of deluge bittorrent client. I have access to python documentation too. I need to know if there are some resources available that can help me build a bitTorrent client that are more detailed than the wikipedia article here: http://en.wikipedia.org/wiki/BitTorrent

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• OPN Knowledge Zones: Have you Signed Up for Specific Updates?

  - by Meghan Fritz-Oracle

  Hi there, partners! Do you want access to OPN resources, tools and product updates? Want to receive customized information relevant to your personal interests? You can now easily manage your communication preferences for the Oracle product Knowledge Zones you consider informative and useful by checking your Oracle Partner Store (OPS) account and specifying your preferences. Even better, you can come back at any time to update your preferences to receive only what’s relevant for your business. It’s easy to do and the benefits are endless! Just follow these simple steps in this video: There is a lot of great information you may be missing out on if you haven’t signed up for the OPN Knowledge Zone, partners. So what are you waiting for?Cheers,Your always-on OPN Communications team

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• Windows Phone 8 detected as mass storage

  - by legends2k

  From version 8 onwards Windows Phone supports MTP (media transfer protocol) to transfer audio and I thought I could use Rhythmbox to upload music onto my device. Thing is Rhythmbox doesn't display the device under Devices pane (there's no Device pane for that matter). I searched other questions here and tried out installing mtp-tools, mtpfs and also tried gMTP, which doesn't seem to detect the device as a portable player. I see that the device's icon looks like a Camera in dash bar and when I see the address location, it shows gphoto2://[usb:002,013]/, which makes me doubt that it's detected as a camera or as a mass storage device. /.gvfs/gphoto2 mount on usb%3A002,003 is where the actual mount is. What do I do to fix this? I tried creating .is_audio_player too.

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• Speaking at the VS 2010 Launch at TechEd India this week

  Ill be speaking at TechEd India and the Visual Studio 2010 Launch in Bangalore, India this week. Ill be doing three sessions: Tuesday 2:30- Building RESTful Applications with the Open Data Protocol Wednesday 12:30-Building Applications with Silverlight 4.0 and WCF RIA Services Wednesday 2:30-Exploring the Silverlight 4.0 Business Features In addition, Team Telerik will be staffing a booth with Tee-shirts (hopefully if they get out of customs on time!) and live demos of our products and our brand new product to be announced today! See you at my sessions or at the booth! Technorati Tags: Telerik,TechEd Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• System that splits passwords across two servers

  - by Burning the Codeigniter

  I stumbled upon this news article on BBC, RSA splits passwords in two to foil hackers' attacks tl;dr - a (randomized) password is split in half and is stored across two separate servers, to foil hackers that gained access to either server upon a security breach. Now the main question is, how would this kind of system would be made... codespeaking, for PHP which I commonly develop on my web applications, the database password is normally stored in a configuration file, i.e. config.php with the username and password, in that case it is understandable that the passwords can be stolen if the security was compromised. However when splitting and sending the other half to the other server, how would this go on when making a communication to the other server (keeping in mind with PHP) since the other server password would be stored in a configuration file, wouldn't it? In terms of security is to keep the other server password away from the main one, just exactly how would the main server communicate, without exposing any other password, apart from the first server. This certainly makes me think...

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• Webcast Replay: Extreme Performance for Consolidated Workloads with Oracle Exadata

  - by kimberly.billings

  If you missed our live webcast Extreme Performance for Consolidated Workloads with Oracle Exadata last week, the replay is now available. Watch the free on-demand webcast in which Tim Shetler, Vice President of Oracle Database Product Management, and Richard Exley, Consulting Member of Technical Staff, discuss how Oracle Exadata can help you can significantly improve application performance and reduce infrastructure costs by consolidating transaction processing, data warehousing, or mixed workloads on Oracle Exadata. Note: (1) Turn off pop-up blockers if the slides do not advance automatically. (2) Slides are available for download. var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); try { var pageTracker = _gat._getTracker("UA-13185312-1"); pageTracker._trackPageview(); } catch(err) {}

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• Ububtu 13.04 Rename Computer

  - by Sourabh

  How can I rename my computer? Renaming it in /etc/hosts and /etc/hostname does something weird. Before renaming it, I am able to open these files via sublime using sudo subl /etc/hosts but when I rename my Computer (using nano) and open any of these files using subl, I get this message: No protocol specified (sublime_text:20071): Gtk-WARNING **: cannot open display: :0.0 So I guess renaming in the above files is not the only thing I have to do. PS: If I rename using sublime, after renaming one of the files, I get same message when I try to open other file

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• Optimization of a Hybrid Pagination Scheme

  - by Kaustubh Karkare

  I'm working on a Web Application using node.js in which I'm building a partial copy of the database on the client-side to decrease the load on my server. Right now, I have a function like this (expressed as python-style pseudocode, but implemented in JavaScript): get(table_name,primary_key): if primary_key in cache[table_name]: return cache[table_name][primary_key] else: x = get_data_from_server(table_name,primary_key) # socket.io return cache[table_name][primary_key] = x While this scheme works perfectly well for caching individual rows, I'd like to extend it to support the creation of paginated tables ordered according to the primary_key, and loading additional data using the above function for only the current and possibly the adjacent pages. Now, I don't want to keep the list of primary keys on the server to be retrieved every time I need to change the page (which, for reasons beyond the scope here, will be very frequent), and keeping it on the client side, subject to real-time create/delete events from the server, doesn't seem that good an idea, even after compression (using ranges, instead of individual values). What is the best way to calculate which items are to be displayed on a random page, minimizing the space requirements & the need for communication with the server?

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• ipv6 just wont go away 12.10 server

  - by VladoPortos

  After very long time using Ubuntu old LTS version I have re-installed to new LTS 12.10, but I can't get rid of ipv6 ! I have did: in /etc/modprobe.d/blacklist.conf: blacklist ipv6 blacklist ip6table_filter blacklist ip6_tables in /etc/sysctl.conf net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 net.ipv6.conf.lo.disable_ipv6 = 1 But ufw happily use v6 protocol, and in dmesg: ip6_tables: (C) 2000-2006 Netfilter Core Team . . IPv6: ADDRCONF(NETDEV_CHANGE): em1: link becomes ready What is going to take to get rid of IPv6 ? I swear Terminator didn't put so much fight.

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• Document Foundation : pas de LibreOffice OnLine cette année mais un feuille de route officielle, le portage pour Android progresse

  La Document Foundation : pas de LibreOffice OnLine cette année Mais un feuille de route officielle, le portage pour Android progresse Edit 16h : La Document Foundation vient de corriger une confusion dans la communication autour des déclinaisons Cloud et mobiles de son fork d'OpenOffice.org. Elle annonce une feuille de route. La Document Foundation a posé hier la dernière pierre de la dernière version de la branche 3.4 de sa suite bureautique open-source. Résultat, son énergie va à présent être entièrement tournée vers la branche 3.5 de LibreOffice. Et vers les nouvelles déclinaisons de son fork d'OpenOffice.org. La première...

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• Document Foundation : pas de LibreOffice OnLine cette année mais une feuille de route officielle, le portage pour Android progresse

  La Document Foundation : pas de LibreOffice OnLine cette année Mais un feuille de route officielle, le portage pour Android progresse Edit 16h : La Document Foundation vient de corriger une confusion dans la communication autour des déclinaisons Cloud et mobiles de son fork d'OpenOffice.org. Elle annonce une feuille de route. La Document Foundation a posé hier la dernière pierre de la dernière version de la branche 3.4 de sa suite bureautique open-source. Résultat, son énergie va à présent être entièrement tournée vers la branche 3.5 de LibreOffice. Et vers les nouvelles déclinaisons de son fork d'OpenOffice.org. La première...

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• What software do you use to help plan your team work, and why?

  - by Alex Feinman

  Planning is very difficult. We are not naturally good at estimating our own future, and many cognitive biases exacerbate the problem. Group planning is even harder. Incomplete information, inconsistent views of a situation, and communication problems compound the difficulty. Agile methods provide one framework for organizing group planning--making planning visible to everyone (user stories), breaking it into smaller chunks (sprints), and providing retrospective analysis so you get better at planning. But finding good tools to support these practices is proving tricky. What software tools do you use to achieve these goals? Why are you using that tool? What successes have you had with a particular tool?

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• OpenJDK In The News: Oracle Outlines Roadmap for Java SE and JavaFX at JavaOne 2012

  - by $utils.escapeXML($entry.author)

  The OpenJDK Community continues to host the development of the reference implementation of Java SE 8. Weekly developer preview builds of JDK 8 continue to be available from jdk8.java.net.OpenJDK continues to thrive with contributions from Oracle, as well as other companies, researchers and individuals.The OpenJDK Web Site Terms of Use was recently updated to allow work on Java Specification Requests (JSRs) for Java SE to take place in the OpenJDK Community, alongside their corresponding reference implementations, so that specification leads can satisfy the new transparency requirements of the Java Community Process (JCP 2.8).“The recent decision by the Java SE 8 Expert Group to defer modularity to Java SE 9 will allow us to focus on the highly-anticipated Project Lambda, the Nashorn JavaScript engine, the new Date/Time API, and Type Annotations, along with numerous other performance, simplification, and usability enhancements,” said Georges Saab, vice president, Software Development, Java Platform Group at Oracle. “We are continuing to increase our communication and transparency by developing the reference implementation and the Oracle-led JSRs in the OpenJDK community.”Quotes taken from the 14th press release from Oracle mentioning OpenJDK, titled "Oracle Outlines Roadmap for Java SE and JavaFX at JavaOne 2012".

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• IPC linux huge transaction

  - by poly

  I'm building and application that requires huge transactions/sec of data and I need to use IPC to for the mutithreaded mutliprocceses communication, I know that there are a lot of methods to be used but not sure which one to choose for this application. This is what the application is gonna have, 4 processes, each process has 4 threads, the data chunk that needs to be transferred between two or more threads is around 400KB. I found that fifo is good choice except that it's 64K which is not that big so i'll need to modify and recompile the kernel but not sure if this is the right thing to do? Anyway, I'm open to any suggestions and I'd like to squeeze your experience in this :) and I appreciate it in advance.

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• Configuring SQL Server Express Edition for remote access

  - by rohancragg

  Originally posted on: http://geekswithblogs.net/rohancragg/archive/2013/07/24/configuring-sql-server-express-edition-for-remote-access.aspxI wanted to access SQL Express on my local machine from within a Client Hyper=V virtual machine on the same Domain. This article got me most of the way there: http://akawn.com/blog/2012/01/configuring-sql-server-2008-r2-express-edition-for-remote-access/ But it was a bit out of date. My steps were: Enable TCP/IP Protocol in SNAC Restart SQL Server Configure (Windows 8) Firewall to allow all Inbound for sqlservr.exe Footnote: I thought this might be relevant (nice to be able to script it): http://support.microsoft.com/kb/968872/en-us But the problem is that this is for fixed ports and not compatible with the (default) Dynamic Ports settings above.

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• Futures/Monads vs Events

  - by c69

  So, the question is quite simple: in an application framework, when performance impact can be ignored (10-20 events per second at max), what is more maintainable and flexible to use as a preferred medium for communication between modules - Events or Futures/Promices/Monads ? Its often being said, that Events (pub/sub, mediator) allow loose-coupling and thus - more maintainable app... My experience deny this: once you have more that 20+ events - debugging becomes hard, and so is refactoring - because it is very hard to see: who, when and why uses what. Promices (i'm coding in javascript) are much uglier and dumber, than Events. But: you can clearly see connections between function calls, so application logic becomes more straight-forward. What i'm afraid. though, is that Promices will bring more hard-coupling with them... p.s: the answer does not have to be based on JS, experience from other functional languages is much welcome.

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• WebCenter in Action: ResCare

  - by Kellsey Ruppel

  Register Now for this webcast. ResCare Solves Content Lifecycle Challenges with Oracle WebCenter Complex documents must be created, assembled, reviewed, and tracked. To avoid fragmented, chaotic information processes, organizations must adopt an integrated set of strategies, standards, best practices, and technologies for managing information. Attend this webcast to learn how Oracle WebCenter has allowed ResCare to: Solve content lifecycle challenges Reduce compliance and business risks Increase adoption of intranet as primary business communication tool Register now for this webcast.  REGISTER NOW Register now for this exclusive event. Tuesday, October 30, 2012 10:00 a.m. PT / 1:00 p.m. ET Presented by: Joe Lichtefeld, VP of Application Services & PMO, ResCare Wayne Boerger, Product Manager, TEAM Informatics Doug Thompson, EVP Global Development, TEAM Informatics Presented by : Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Contact Us | Legal Notices and Terms of Use | Privacy Statement

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• Laptop won't get to grub after meddling with kernels

  - by Joren

  I recently found out I had different kernel versions installed, so I removed the 3.9 kernel as proposed in this answer on my earlier question. After that, I updated my grub, but My laptop won't seem to reach it. Output of aptitude search linux | grep ^i: i libselinux1 - SELinux runtime shared libraries i libselinux1:i386 - SELinux runtime shared libraries i linux-firmware - Firmware for Linux kernel drivers i A linux-headers-3.11.0-12 - Header files related to Linux kernel versi i A linux-headers-3.11.0-12-generic - Linux kernel headers for version 3.11.0 on i linux-headers-3.11.4-031104 - Header files related to Linux kernel versi i linux-headers-3.11.4-031104-gen - Linux kernel headers for version 3.11.4 on i linux-headers-generic - Generic Linux kernel headers i linux-libc-dev - Linux Kernel Headers for development i linux-sound-base - base package for ALSA and OSS sound system i pptp-linux - Point-to-Point Tunneling Protocol (PPTP) C i syslinux - collection of boot loaders i syslinux-common - collection of boot loaders (common files) i syslinux-legacy - Bootloader for Linux/i386 using MS-DOS flo i util-linux - Miscellaneous system utilities How do I proceed to fix this error from my live cd?

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• What failure can kill a long running IRC client? [closed]

  - by Xeoncross

  I have an IRC bot that I built in PHP using sockets that attempts to run forever and (if disconnected) reconnects again. I have it listening to several channels. Apparently it's fairly resilient, because it can run for several days before the process ends and CRON has to start it up again. However, based on the fact the process ends I'm assuming there are other conditions I'm not accounting for that are causing problems. I have nothing in my error logs giving me a hint. In addition, sometimes the process will continue running - but I notice it's no longer present in any of the channels on the IRC server which makes me think it violated some part of the protocol. I have logic setup to handle: reply to PING's correctly reconnect on disconnect (and reconnect to channels) respond to private messages (so someone doesn't ban it) prevent memory leaks What other failure could be killing my long-running IRC client?

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• Advice Required Regarding Creating a Self Learning, Self Organizing Programming Team....

  - by tGilani

  Hello I'm a senior student at my university and chairperson of IEEE Student Branch there. Recently I was thinking of some idea to acquaint students with the professional environment, how software is produced in the industry and get a practical experience.. Obviously trips to software houses are not enough and we cannot provide this many internships. So the idea of simulating a software house within the university popped in. Resources at my disposal are students with their own laptops, university UPS and lan network with internet access, and a reasonably sized room with a whiteboard and three hours free time daily.. :) However, I have absolutely no idea where to begin with. Milestones or whatever it may be called, are Requirements Document generation, sharing of resources, delegation of tasks, version controlling etc... I'd really appreciate some advice, programming tools (for JAVA), communication tools etc and other things used in a decent software house... Technologies to be targeted shall be random possibly starting with J2EE Spring Hibernate and Later Visual Programming in .NET C# and ASP.NET MVC as well as Android or iPhone development....

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• svn-based versioning tool, problem with network timeout

  - by Scarlet

  My dev team was committed a versioning tool based on Subversion to run on Windows (our svn client is sliksvn). We're developing with Delphi XE2, should that matter. We're asked to implement a "check for updates availability" feature, which has to work as follows: Connect to the SVN repo via svn+ssh protocol; See if there are changes to receive and list them; Let the user decide if he wants to receive changes or not. We don't have a great knowledge on svn, so we thought to implement that thing client side by a certain number of CreateProcess calls that wrap directly proper svn commands. Anyways what we perceived is that if network problems should arise, such like a connection drop, svn client hangs forever waiting for the operation to close instead of failing for timeout. We know that CreateProcess can be given a timeout argument, but it wouldn't be correct to use it, as we can't know from outside how long will be the svn operation taking to complete. Is there any way to avoid that deadlock?

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• Why do XML namespace URIs use the http scheme?

  - by svick

  A XML namespace should be a URI, but it can use any URI scheme, including those that are not URLs. Then why do all widely used XML namespaces use the http scheme (e.g. http://www.w3.org/XML/1998/namespace), considering that trying to use the URI as an URL by retrieving that document using the HTTP protocol is not guaranteed to do anything useful (and often doesn't)? I understand the usefulness of DNS domains in namespace names to help guarantee uniqueness. But that doesn't require the http scheme, there could be a separate scheme for that (something like namespace:w3.org/XML/1998/namespace). This would avoid the confusion between URIs and URLs, while maintaining domain-based uniqueness.

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• Two "subdomains" crossing search results

  - by LuckySpoon

  My question relates to two websites, each of which is a "Calvary Christian College", however in two totally different locations and unrelated to each other entirely (except by name, and domain). All schools in the state are issued a .qld.edu.au, in this case calvary.qld.edu.au and calvarycc.qld.edu.au. Now what's interesting is that these domains are crossing each other in sitelinks for searches such as "calvary christian college townsville" (if you check the sitelinks 2/6 are to a different domain). I've put a demotion in for this ages ago (we control calvary.qld.edu.au), however we're seeing no change on the results page. I have been able to get the owners of calvarycc.qld.edu.au to submit demotions for our domain, which should go in sometime this week. What can we do to tell Google that these websites are not interchangeable, despite both appearing as "subdomains" of qld.edu.au. We can possibly open channels of communication with the administrators of qld.edu.au but will need to tell them what we need to change, and at this point I'm out of ideas.

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• Restricting access to sites

  - by Paul

  I'm having some problems configuring my local proxy server so that it would restrict access to certain websites. The proxy server I'm using is Squid; I edited its configuration file found in /etc/squid/squid.conf to include the following: acl wikipedia dstdomain .wikipedia.org http_access deny wikipedia I tried to redirect elinks to use Squid. According to Squid's config file, it listens to port 3128, so in /etc/elinks/elinks.conf I added the following: set protocol.http.proxy.host = "localhost:3128" I also restarted Squid with sudo /etc/init.d/squid restart, but I can still access the banned websites using Elinks. What did I do wrong?

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• Need a really simple client manage script to deliver graphics and revisions, please help?

  - by Mark R

  I am looking for a very simple client management script. The process flow of the script should be: Client orders (paypal etc) while giving specs on what they need given login details and thanked for their order backend for them consists of a 2 way communication. They ask questions we answer. We also upload the graphics here where they either accept them or as for revision. process complete. Now I cannot for the life of me find something as simple as this. It seems all the scripts out there are way too complicated. Does anyone know of one I can use to do this?

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