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• JavaOne Blog RSS is here!

  - by Cassandra Clark

  tweetmeme_url = 'http://blogs.oracle.com/javaone/2010/06/javaone_blog_rss_is_here.html'; Share .FBConnectButton_Small{background-position:-5px -232px !important;border-left:1px solid #1A356E;} .FBConnectButton_Text{margin-left:12px !important ;padding:2px 3px 3px !important;} Don't be the last one to know all the juicy details about JavaOne.  Subscribe to the newly implemented RSS feed and see the news as soon as it is posted.  We have a long list of updates to come in the next few weeks; Java University, Schedule Builder, contests, quizzes and much much more. 

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• Qt question: hard-coded shortcuts

  - by miLo

  I have asked this question on several places but I still can't figure it out. What I am trying to do is to have a QKeySequence(Qt::CTRL + Qt::Key_X, Qt::CTRL + Qt::Key_C) in a MainWindow with QTextEdit as a central widget. The problem is that I have a shorcut for Cut(Ctrl+X) and when I press Ctrl+X,Ctrl+C it doesn't work. When the focus is on diffrent widget the shorcut works perfectly. I tried with overriding the QWidget::keyPressEvent and QWidget::event but it is the same. I have one more question: if I have these two shorcuts Ctrl+X and Ctrl+XCtrl+C why I don't receive the signal activatedAmbigiously() when I press Ctrl+X? According to the Qt documentation When a key sequence is being typed at the keyboard, it is said to be ambiguous as long as it matches the start of more than one shortcut.

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• Storing lots of large strings with frequent "appends" and few reads

  - by Thiago Moraes

  In my current project, I need to store a very long ASCII string to each instance of a given object. This string will receive an 2 appends per minute and will not be retrieved so frequently. The worst case scenario is a 5-10MB string. I'll have thousands of instances of my object and I'm worried that storing all those strings in the filesystem would not be optimal, but I can't think of a better solution. Can anyone suggest an alternative? Maybe a key-value store? In this case, which one? Any other thoughts?

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• Flash isn't working in Chrome on 64 bit Ubuntu 10.10 fresh install

  - by IanBalisy

  I just installed Ubuntu 10.10 64 bit last night on my laptop and installed Google Chrome ver. 8.0.552.237. So far flash works on Firefox and Chromium, but not at all on Chrome. I did the sevenmachines install for flashplugin64 and that worked for firefox and chromium. Anyone know how to make it work on Chrome? I really would prefer to use Chrome over Chromium, but if it's not an easy fix I can switch. I'm not too Ubuntu literate, but I can figure things out if necessary. (In short, long explanations are not necessary).

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• How to Install the MATE Desktop & Go Back to GNOME 2 on Ubuntu

  - by Chris Hoffman

  If you long for the days of GNOME 2 and just can’t get along with Unity or GNOME 3, MATE is here to save you. It’s an actively developed fork of GNOME 2, and it’s easily installable on Ubuntu. MATE isn’t available in Ubuntu’s repositories, but the MATE developers offer an official repository for Ubuntu. Unlike some methods that recommend you use Linux Mint’s repository on Ubuntu, this won’t mess up your system. How to Own Your Own Website (Even If You Can’t Build One) Pt 1 What’s the Difference Between Sleep and Hibernate in Windows? Screenshot Tour: XBMC 11 Eden Rocks Improved iOS Support, AirPlay, and Even a Custom XBMC OS

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• Can't upgrade Firefox

  - by Deb Vorndran

  When I first got Ubuntu and got used to it, I decided to install lots of packages, and I overwhelmed the update manager. I had to interrupt it, because the download time was crazy long. That was 2 years ago. I haven't been able to upgrade anything since then. But now, some things I need will not work in my 2-year-old version of Firefox. I want to cancel all of the package installations that I started, and was not able to finish, and I need to upgrade Firefox. What should I do?

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• IIM Calcutta &ndash; EPBM 14 &ndash; Campus Visit - Arrival

  - by Ram Shankar Yadav

  Here I’m in the Mecca of Management, India’s premier institute of management, to learn great things about management with the management Gurus!! As they say a picture is worth thousand words, so I’ll say it by thousand Pictures ;) EPBM, yep that’s an acronym for Executive Programme in Business Management. It’s a year long program having 14 different management subject, designed to suit working professionals. For more info on EPBM please visit : http://www.iimcal.ac.in/edp/ld.asp or http://www.hnge.in/retail/iimc/iimc_epbm_15.htm   I’m gonna post my experiences, and hope that it will be useful for someone, who is interested in doing this programme. The collage above depicts my full day i.e., 25th April 2010, which started by taking pictures of beautiful moon night @ 3 AM, followed by air travel from 11 AM - 5 PM , meeting with friends/batch mates at Kolkata airport, one and half hour ride to Joka Campus by Yellow Taxi, “New Building” hostel…etc. Things that I didn’t captured on camera : Sweat after reaching campus, IPL Final watching in Common Room, Lot of GAGS and things that you can only experience by being here ….!~ Stay tuned for more…. ram :)

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• unseen/unknown function definition in linux source

  - by Broncha

  Can any one please explain this piece of code I found in the linux kernel source. I see a lots of code like this in linux and minix kernel but dont seem to find what it does (even if C compilers support that kind of function definition) /* IRQs are disabled and uidhash_lock is held upon function entry. * IRQ state (as stored in flags) is restored and uidhash_lock released * upon function exit. */ static void free_user(struct user_struct *up, unsigned long flags) __releases(&uidhash_lock) { uid_hash_remove(up); spin_unlock_irqrestore(&uidhash_lock, flags); key_put(up->uid_keyring); key_put(up->session_keyring); kmem_cache_free(uid_cachep, up); } I cannot find out if this reference __releases(&uidhash_lock) before the parenthesis starts is allowed OR supported. (It sure is supported as it is in the linux kernel)

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• Ubuntu Software Center does not proceed from applying changes

  - by aneal

  I have a problem with Ubuntu software center. It is "Searching" and "applying changes" for long period of time. I tired to cancel by clicking cross(X) mark. However, it is now stuck at "cancelling". It won't let me download any new application even from terminal i guess. neal@neal-G50VT:~$ sudo apt-get install gnome-tweak-tool E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable) E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it? neal@neal-G50VT:~$ sudo dpkg --configure -a dpkg: error: dpkg status database is locked by another process There are similar question here, but with no answers: Software Center stuck for Dropbox Software Center freezes during “applying changes

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• Return to the old C days.

  - by RPK

  Long back I used to program on C and than VB exploitation changed the career path. After VB came the .NET that proved to be a HoneyPot of Microsoft for old VB programmers and frustrated programmers of other hard to learn languages. The label on this HoneyPot was: "Getting things done." I now want to contribute to the Linux and other GNU projects. I feel whatever programming language you learn today, but if programming is your bread-and-butter, you must remain in touch with C. Many things have changed now. From the old Turbo-C for DOS to the present ...? Please advise me how to get back on the C track again. Reading again whole thing, chapter-by-chapter is not possible now, but I can learn by writing small utilities type of things, but sure GUI based. And yes, I hope, learning is going to be easy now with so many live forums and active community spots like StackOverflow etc.

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• Do most programmers copy and paste code?

  - by John MacIntyre

  I learned very early on that cutting & pasting somebody else's code takes longer in the long run that writing it yourself. In my opinion unless you really understand it, cut & paste code will probably have issues which will be a nightmare to resolve. Don't get me wrong, I mean finding other peoples code and learning from it is essential, but we don't just paste it into our app. We rewrite the concepts into our app. But I'm constantly hearing about people who cut & paste, and they talk about it like it's common practice. I also see comments by others which indicate it's common practice. So, do most programmers cut & paste code?

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• How do you approach tutorials

  - by aurel

  Hi I get lots of interesting tutorials through feeds and sometimes I implement them step by step, other times I just read through them and note anything that I do not know. when ever I implement them I takes a long time - starting the project, typing the code (as I feel there is no point to copy and paste ), then going back and forth between browser and editing program All in all, I am interested to know how do you learn from the tutorials (I'm no where close to being an expert). Or if you don't use tutorials, is there any other way to learn? Thanks a lot

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• Software Craftsman Pilgrimage Comes Together

  - by Liam McLennan

  Last week on Software Craftsman Pilgrimage I was trying to organise where I will be travelling, and the companies I will be pairing with. I now have a confirmed itinerary. 9 - 11th April Alt.NET Seattle 12th April Craftsman visit with Didit (Long Island) 13th April rest day :) 14th April Craftsman visit with Obtiva (Chicago) 15th – 16th April Craftsman visit with 8th Light (Chicago) 17th – 18th April Seattle Code Camp I am looking forward to all of my visits and talking to all the smart people who work there. I will be blogging my progress and hopefully shooting some video. If you are in Seattle, New York or Chicago and would like to meet up to chat about craftsmanship, programming, ruby or .NET please email me.

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• Fix for EF4 Profiler Issue Coming in next Cumulative Update

  - by Ajarn Mark Caldwell

  Hey!  What do you know?  Microsoft Connect really works! I was very happy this morning to open my email and find a notice from Umachandar on the SQL Programmability Team that they have created a fix for the Odd Profiler Results with EF4 issue that I wrote about last June.  Not only did I blog about it, but I logged an item to Connect with repro steps and sample code.  And now, they have announced that they have a fix for this problem and that it will be included in the next Cumulative Update for SQL Server 2008 R2. For those of you not running 2008 R2, or who prefer to wait for full Service Packs rather than install the latest Cumulative Updates, I also wrote about a workaround for the issue, as long as you do not require the Multiple Active Result Sets feature to be enabled. It is easy with Microsoft to get the feeling that you’re just shouting in the wind, and it is nice to get validation once in a while that they really are listening.

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• Code Monster Helps Introduce Kids (and Curious Adults) to the Basics of Programming

  - by Jason Fitzpatrick

  If you’re looking for a fun way to introduce a kid to programming (or sate your own curiosity), Crunchzilla’s Code Monster is a real-time introduction to basic programming concepts. How does Code Monster work? Users are guided through the programming experience (using JavaScript) by a talkative blue monster that asks questions about the code and suggests courses of action. Play long enough and you travel from simple variables to more complex ideas like conditionals, expressions, and more. It’s not a comprehensive programming curriculum (nor does it claim to be) but it’s a great way to introduce people of all ages to programming. Hit up the link below to take it for a spin. Code Monster [via O'Reilly Radar] 8 Deadly Commands You Should Never Run on Linux 14 Special Google Searches That Show Instant Answers How To Create a Customized Windows 7 Installation Disc With Integrated Updates

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• Learning Python is good?

  - by user15220

  Recently I have seen some videos from MIT on computer programming topics. I found it's really worth watching. Especially the concepts of algorithms and fundamental stuffs. The programs were written and explained in Python. I never had looked into this language before as I learned and doing stuffs with C/C++ programming. But the cleanliness and better readability of syntax attracted me. Of course as a C++ programmer for long time it's the most readable language for me. Also I heard Python library contains solid algorithms and data-structures implementations. Can you share your experience in this language?

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• Simplified knapsack in PHP

  - by Mikhail

  I have two instances where I'd like to display information in a "justified" alignment - but I don't care if the values are switched in order. One example being displaying the usernames of people online: Anton Brother68 Commissar Dougheater Elflord Foobar Goop Hoo Iee Joo Rearranging them we could get exactly 22 characters long on each line: Anton Brother68 Foobar Commissar Elflord Goop Dougheater Hoo Iee Joo This is kind of a knapsack, except seems like there ought to be a P solution since I don't care about perfection, and I have multiple lines. Second instance is identical, except instead of names and character count I would be displaying random images and use their width.

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• AutoVue Success at Siemens Energy!

  - by prasenjit.niyogi(at)oracle.com

  Siemens Improves Review and Collaboration with Visually Enabled Engineering Platform Siemens Energy Incorporated offers products, solutions, and services for the entire energy conversion chain--from power generation and transmission to distribution. The organization primarily serves energy utilities and industrial companies. Siemens faced challenges in the form of: Long design review cycles and potential field service delays that stemmed from users' inability to digitally access, view, and collaborate on design documents for energy-related projects stored in SAP High costs and IT administration complexity that was caused by multiple design visualization tools Learn how the customized integration of Oracle's AutoVue with SAP, thanks to Oracle partner Lifecycle Technology, significantly streamlined design review processes, improved productivity, and eliminated paper-based collaboration for the field service technicians and engineers. Read the complete snapshot here

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• Open source level editor for HTML5 platform game?

  - by Lai Yu-Hsuan

  A natty GUI editor is very helpful to create level map. I want to use some open-source choices rather than build my own from scratch. I found Tiled Map Editor but it doesn't work for what I want. Though I'm building HTML5 game, I don't have to use a HTML5 level editor as long as it can output well-formatted map files which my javascript can read. Edit: Sorry for the confusion. Tiled does not work for me because to make the player perform a 'tricky' jump, sometimes I want to set the distance between two platforms to, say, 7/3 or 8/3 tiles. But in Tiled I get only 2 or 3. If Tiled can do this, please teach me.

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• Not getting GUI mode on ubuntu 12.04 desktop edition after installation on vmware workstation 7

  - by Salil Naik

  I installed Ubuntu 12.04 desktop edition on my PC using VMWare workstation 7. I assigned 1GB RAM and 20 GB Hard disk to Ubuntu. While starting Ubuntu virtual machine, It is not starting up with GUI mode. In is prompting me my Login ID in textual mode always. After waiting for long time as well the GUI mode is not appearing. I tried running sudo apt-get install updates sudo apt-get install xinit sudo apt-get install ubuntu-desktop Honestly, i don't know the meaning of all these.I am very new to ubuntu.Please help me here what to do? Below is my Laptop configuration OS: Genuine Windows 7 Home Basic(64 bit) RAM: 3 GB Processor: Intel core i3 Regards Salil

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• Avatar (spoiler alert!)

  - by Dave Yasko

  This past weekend we finally saw “Avatar,” or as I like to call it “Dances with Smurfs.”  It was rather light on the story, heavy on the message, and incredibly well done.  The eye for detail is what blew me away, especially the visual distortion (presumably due to density) when the two atmospheres mixed.  The only thing I thought they might have missed was why so many (presumably) mammals had 6 appendages (4 arms + 2 legs) and breathed through passages near their clavicles, but the Na’vi (sp?) didn’t have/do either.  Also, James Cameron just loves to telegraph upcoming events: Riding the big red bird thing has only happened 5 times before – Sully is on the job.  The tree is going to download dying Ripley to her avatar body – Sully is going to do that too.  I’ve seen worse foreshadowing, but not in a long time. I give it 4 Papa Smurfs out of 5.

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• Which tool to use for "home banking"?

  - by Huygens

  I would like to manage my bank accounts in a secure manner on Ubuntu. I saw several applications in the Software Centre, but I don't know which one to choose. I don't need fancy features like stock options. I just have regular accounts which I want to follow, I don't want complicated stuff. As bank data are quite sensitive, I would highly prefer an application that does encryption of the data. Though, if you have a really cool app but it does not have this feature, as long as it offers to store the data in one dedicated place, I could do with encrypting that place. So what tool do you use that could fit my needs?

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• Difference in fans on Windows 7 and Ubuntu 12.04

  - by Timo

  I have bought a Hp Pavilion DV7 with Core i7 CPU and installed Ubuntu 12.04 on dual boot with Windows 7 alongside. Apart from the difference in battery life (although that's fixed with Jupiter), I have another problem with the fans. On Windows my fans work perfectly and the laptop is cool, but it seems to overheat in Ubuntu. It becomes quite hot and it looks like my fans are not working under Ubuntu. I think I'm having the same problem as How can I keep the cpu temp low?, but since I cannot comment because of the lack of reputation (?), I post the question as a new thread. I think the result of the overheating is that my keyboard doesn't seem to follow when I start typing a long text. It just freezes and types the last letter multiple times. For example: when I type the word freezes, it shows freeeee so the zes changed into eee...

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• Roll Your Own DIY Solar-Powered Security Camera Setup

  - by Jason Fitzpatrick

  If you’re looking to set up a security camera without running power or video lines, this solar-powered version combines a cheap Wi-Fi cam with a home-rolled solar setup to provide surveillance without wires. Courtesy of Reddit user CheapGuitar, the setup combines a dirt cheap off-brand Wi-Fi security camera, a Tupperware container spray painted black, some old camping solar panels, and a battery into a security camera that checks in as long as it’s in range of a Wi-Fi router or repeater. Hit up the link below to check out the build guide. Solar Powered Camera [via Hack A Day] HTG Explains: What Is Windows RT & What Does It Mean To Me? HTG Explains: How Windows 8′s Secure Boot Feature Works & What It Means for Linux Hack Your Kindle for Easy Font Customization

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• How do I approach large companies if I have a killer mobile game idea?

  - by Balázs Dávid

  I have an idea for a game that has potential, but I'm not a programmer. How do I tell this to development companies without having my idea stolen? All I want from the company is for somebody to watch a three minute long video presentation about my idea and if they see potential in it then we can talk about the details. I have already sent an e-mail to several big companies that have the expertise needed to code the game, they haven't answered me. Actually the idea is nothing fancy, no 3D, but fun and unique.

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