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• Advice for a computer science sophomore in college?

  - by RDas

  Hi Everyone! I'm a sophomore in college majoring in Computer Science and Math. I have always loved programming. I started programming in C when I was nine years old and over the years I've picked up Visual Basic, C#, Java, C++, JavaScript, Objective-C, Python, Ruby, elementary Haskell and elementary Erlang, and I learned Perl back in the day which I've mostly forgotten. I have not done much network programming. I have done CGI programming, but that was about six/seven years ago. I've done some socket programming and written (school) programs to do interprocess communication, which I understood and liked. I'm taking a course on client/server programming and another one on network security next semester, which I am really looking forward to. I'm seeking advice on how to proceed with future learning. I've mostly done application (mobile and desktop) development, not much of web development. I'd like to pick up some web development this coming semester. Since I know Ruby and Python, should I start by learning Django and/or Rails? Any other suggestions on starting web development? I have a good understanding of HTML and CSS. Also, I'd also like to know how hard it is to pick up and be good (read: productive) in functional programming languages coming from a purely structured/object oriented background? I've been reading up on Erlang and Haskell, and I'd like to know your opinions on whether it's worth my time trying to learn them. What about Lisp, Scheme and other functional languages? Any help/ideas would be really appreciated.

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• Common mistakes which lead to corrupted invariants

  - by Dave B.

  My main source of income is web development and through this I have come to enjoy the wonders of programming as my knowledge of different languages has increased over the years through work and personal play. At some point I reached a decision that my college education was not enough and that I wanted to go back to school to get a university degree in either computer science or software engineering. I have tried a number of things in my life and it took me a while before I found something that I feel is a passion and this is it. There is one aspect of this area of study that I find throws me off though. I find the formal methods of proving program correctness a challenge. It is not that I have trouble writing code correctly, I can look at an algorithm and see how it is correct or flawed but I struggle sometimes to translate this into formal definitions. I have gotten perfect or near perfect marks on every programming assignment I have done at the college level but I recently got a swath of textbooks from a guy from univeristy of waterloo and found that I have had trouble when it comes to a few of the formalisms. Well at this point its really just one thing specifically, It would really help me if some of you could provide to me some good examples of common mistakes which lead to corrupted invariants, especially in loops. I have a few software engineering and computer science textbooks but they only show how things should be. I would like to know how things go wrong so that it is easier to recognize when it happens. Its almost embarrassing to broach this subject because formalisms are really basic foundations upon which matters of substance are built. I want to overcome this now so that it does not hinder me later.

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• myToys.de GmbH announces integration of ZVT payment terminal interface with Oracle Retail Point-of-Service

  - by user801960

  In our latest guest post, Sascha Kraatz, Developer Oracle E-Business Suite of myToys.de announces the development and integration of its ZVT payment terminal interface with the Oracle Retail Point-of-Service solution. myToys.de GmbH, which runs Oracle Retail Point-of-Service (ORPOS) in its 13 retail stores in Germany (see press release), has developed and implemented a Java-based interface for integrating the ZVT payment terminal with ORPOS. Through the combined support of payment service provider, easycash GmbH, and Ingenico GmbH, Germany´s leading payment terminal provider, myToys.de has become the first organisation to create this new automated solution for the Oracle Retail Point-of-Service, which has eliminated input errors that could occur with manual payment terminals and is localised for the German market. Ingo Stober, head of retail business at myToys.de confirms: “With this solution, we can speed up the payment process, reduce manual errors and enhance the customer experience in our stores”. myToys.de GmbH is a member of the Otto Group and one of the leading multichannel retailers for toys and other kids products in Germany. Customers can choose from over 100,000 attractive products, starting with items for expectant mothers or basic baby equipment to items for school children and beyond. In 2006, the first of 13 myToys.de retail branches was opened. If you would like to find out more about this solution, please contact the head of Oracle E-Business Suite Development at myToys.de, Mr. Ralf Schmilewski, or leave a comment below.

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• How can I transition from being a "9-5er" to being self-employed?

  - by Stephen Furlani

  Hey, I posted this question last fall about moonlighting, and I feel like I've got a strong case to make to start transitioning from being a Full-Time Employee to being self-employed. So much so, that I find it hard to concentrate at work on the things I'm supposed to be doing. However, self-employment comes with things like no health benefits or guaranteed income... so I don't feel like I can just quit. (At least not in this economy with a house and family). I'm already working 40hrs/wk on my main job, going to school to get my MS, and trying to freelance on weekends and evenings, but I want to give it more time. If I can't take LWOP or just work less than 40hrs/wk I feel like I have to give up self-employment because I just can't give my day job all my best. Would it be reasonable to ask my employer if they can cut my hours (and pay)? Is there something else I can/should do? Has anyone done this transition and had it turn out well? or bad? I am in the USA and I understand answers are not legal advice. Thanks!

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• Office add on saves you time if you use Moodle

  - by Brian Scarbeau

  Moodle is a free elearning content management software program. It does take a great deal of time to set it up because you need to upload your Office files to Moodle. Now, Microsoft has made that job easier with their new Office Add on. With it you can save directly into Moodle.   Here are the instructions on how to use. Just change the URL you use for your Moodle site. 1. Go to this site and download and install the software. http://www.educationlabs.com/projects/officeaddinformoodle/Pages/default.aspx 2. Open your Office Word in this example and then select Save to Moodle (Notice you can also open files that you have stored in moodle make changes and then save back to moodle. (WOW) 3,  Now because this is the first time you are using this feature you will see a dialog box that looks like this: Enter the moodle website exactly as you see here along with your username and password for moodle. Click the checkbox to remember you. 4. After you click on Save to Moodle you should see a dialog box like this: 5.  Click the plus on the left Lake Highland Preparatory School-Online Learning 6. You will now see the listing of your moodle classes. Now click on the class that you your file to go to and save. Now you use this file in moodle. Good luck!

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• Silverlight Cream for June 12, 2010 -- #880

  - by Dave Campbell

  In this Issue: Michael Washington, Diego Poza, Viktor Larsson, Brian Noyes, Charles Petzold, Laurent Bugnion, Anjaiah Keesari, David Anson, and Jeremy Likness. From SilverlightCream.com: My MEF Rant Read Michael Washington's discussion about MEF from someone that's got some experience, but not enough to remember the pain points... how it works, and what he'd like to see. Prism 4: What’s new and what’s next Diego Poza Why Office Hub is important for WP7 Viktor Larsson has another WP7 post up and he's talking about the Office Hub ... good description and maybe the first I've seen on the Office Hub. WCF RIA Services Part 1: Getting Started Brian Noyes has part 1 of a 10-part tutorial series on WCF RIA Services up at SilverlightShow. This first is the intro, but it's a good one. CompositionTarget.Rendering and RenderEventArgs Charles Petzold talks about CompositionTarget.Rendering and using it for calculating time span ... and it works in WPF and WP7 too... cool example from his WPF book, and all the code. Two small issues with Windows Phone 7 ApplicationBar buttons (and workaround) Laurent Bugnion has a post up from earlier this week that I missed describing problems with the WP7 ApplicationBar ... oh, and a workaround for it :) Animation in Silverlight Anjaiah Keesari has a really extensive post up on Silverlight animation, and this is an all-XAML thing... so buckle up we're going old-school :) Two fixes for my Silverlight SplitButton/MenuButton implementation - and true WPF support David Anson revisits and revises his SplitButton code based on a couple problem reports he received. Source for the button and the test project is included. Tips and Tricks for INotifyPropertyChanged Jeremy Likness is discussing INotifyPropertyChanged and describes an extension method. He does bring up a problem associated with this, so check that out. He finishes the post off with a discussion of "Observable Enumerables" Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• How to Combine Rescue Disks to Create the Ultimate Windows Repair Disk

  - by The Geek

  We’ve covered loads of different anti-virus, Linux, and other boot disks that help you repair or recover your system, but why limit yourself to just one? Here’s how to combine your favorite repair disks together to create the ultimate repair toolkit for broken Windows systems—all on a single flash drive. The ones we’ve covered already? Here’s a quick list of all the ways you can recover your system with a rescue disk: How to Use the Avira Rescue CD to Clean Your Infected PC How to Use the BitDefender Rescue CD to Clean Your Infected PC How to Use the Kaspersky Rescue Disk to Clean Your Infected PC Change or Reset Windows Password from a Ubuntu Live CD The 10 Cleverest Ways to Use Linux to Fix Your Windows PC Change Your Forgotten Windows Password with the Linux System Rescue CD Use Ubuntu Live CD to Backup Files from Your Dead Windows Computer If you need to clean up an infected system, we’d absolutely recommend the BitDefender CD, since it’s auto-updating. Best bet? Create your ultimate boot disk with as many of the different utilities as your flash drive can hold Latest Features How-To Geek ETC How To Boot 10 Different Live CDs From 1 USB Flash Drive The 20 Best How-To Geek Linux Articles of 2010 The 50 Best How-To Geek Windows Articles of 2010 The 20 Best How-To Geek Explainer Topics for 2010 How to Disable Caps Lock Key in Windows 7 or Vista How to Use the Avira Rescue CD to Clean Your Infected PC Luigi Installs Any OS on Google’s Cr-48 Notebook DIY iPad Stylus Offers Pen-Based Interaction on the Cheap Serene Blue Ubuntu Wallpaper for Your Desktop Enjoy Old School Style Video Game Fun with Chicken Invaders Hide the Twitter “Litter” in Twitter’s Sidebar Area (Chrome and Iron) Public Domain Day: Reflections on Copyright and the Importance of Public Domain

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• How To Temporarily Disable The Touch Screen In X1 Carbon

  - by Daniel Cazzulino

  I know, why would anyone want to do that? Scott properly predicted: Don't knock a touchscreen until you've used one. Every laptop should (and will) have a touch screen in a year. Mark my words. And surely, less than a year later, the X1 Carbon (an amazing ultrabook for sure) has a touch model. And as of today, the price difference for the touch screen is a ridiculous $30 (actually $24 with a “back to school” coupon right now ;)): So why would you NOT get it? I know for some it works great. Now, let’s get real about touch *for a developer* for a minute. About 99.9% of my time in front of my laptop I’m either using Visual Studio or Chrome. I have my hands on the keyboard ALL THE TIME. I use the trackpoint ALL THE TIME. If I want to scroll, I only have to slightly move my fingers. I don’t click around much on pages: I READ them. So, in a few months of using the X1, I think I touched the screen like 10 times, and it was mostly to clear dust, which drives whatever app is in focus crazy. Plus, at home I have this simple setup:...Read full article

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• Compelling Keynotes Coming: Oracle OpenWorld Latin America

  - by Oracle OpenWorld Blog Team

  Make your plans now for 4-6 December in São Paulo! Again this year there are informative and inspiring keynotes lined up for Oracle OpenWorld Latin America. For the opening keynote on 4 December, Oracle President Mark Hurd and Chief Technology Officer Edward Screven will talk about the many elements that are defining the convergence of business and information technology. The next day's keynote will focus on cloud computing, diving deeply into how mobile and social technologies play into this critical way of delivering services. Featured speakers are Oracle executives Thomas Kurian, Andrew Mendelsohn, and Robert Shimp. On Thursday, 6 December, Anthony Lye, Oracle senior vice president, will discuss the customer experience revolution and how the analysis of customer behavior can help shape companies' ability to understand and adapt more effectively to their customers' needs and wants. And, of course, Oracle partners always have interesting and exciting things to say. Be sure to come hear about innovations from Odebrecht, CTIS Tecnologia, and Intel do Brasil executives on topics including technology adoption that drives business results; the "Model School" revolution; and the role of the data center as technology advances. You can still enjoy Early Bird savings through 3 December, so register now!

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• Oye! Help Build OTN America Latina!

  - by rickramsey

  Yes, tango is passion, but it is passion born of romance. Not passion born of lust. As it is so often portrayed today. Understand that, and you will begin to understand why life in Latin America is so rich. image courtesy of Continental Magazine. You don't often get a chance to shape the direction of a technical comunidad. Somebody else gets there first and pretty soon everyone is in a rathole about the relevance of rutabagas. Or rutabagels as my public-school-educated hijas prefer to call them. Well, OTN American Latina is just starting up. If you're a techie who speaks Spanish or Portuguese, or if you just like hanging out with techies latinoamericanos (and who doesn't?), here's how to get in on the fun: Why Portuguese Speaking Techies Should Join Why Spanish Speaking Techies Should Join And here are the sites themselves: OTN America Latina in Brazilian Portuguese OTN America Latina in Spanish If you're not sure which site to visit, just remember that Brazilian Portuguese is Spanish spoken with a little body English. Ricardo System Admin and Developer Community of the Oracle Technology Network

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• Converting 2D coordinates from multiple viewpoints into 3D coordinates

  - by Kirk Smith

  Here's the situation. I've got a set of 2D coordinates that specify a point on an image. These 2D coordinates relate to an event that happened in a 3D space (video game). I have 5 images with the same event point on it, so I have 5 sets of 2D coordinates for a single 3D coordinate. I've tried everything I can think to translate these 2D coordinates into 3D coordinates, but the math just escapes me. I have a good estimate of the coordinates from which each image was taken, they're not perfect but they're close. I tried simplifying this and opening up Cinema 4D, a 3D modeling application. I placed 5 cameras at the coordinates where the pictures were taken and lined up the pictures with the event points for each one and tried to find a link, but nothing was forthcoming. I know it's a math question, but like I said, I just can't get it. I took physics in high school 6 years ago, but we didn't deal with a whole lot of this sort of thing. Any help will be very much appreciated, I've been thinking on it for quite a while and I just can't come up with anything.

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• Week 11: Spring Break Destination: Specialization

  - by sandra.haan

  Oh how we miss Spring Break - a whole week off from school to play in the sun and get re-charged. You are probably sitting at your computer right now wishing your feet were in the sand on a warm beach somewhere instead of at your desk. Sadly, we can't transport you to a tropical paradise, but we can offer a quick Spring Break with OPN Specialized (shoes optional). Ingredients: 1 dose of Sun FAQ 1 pinch of OPN Specialized awareness 6 OPN Specialized Webcasts 1.5 months of promotional pricing Slather yourself in Sun knowledge by reviewing the FAQ. Once armed with the direction for Sun partners, relax and dive into a good read on OPN Specialized - ahh yes, that's right - the new OPN program offering you the ability to differentiate yourself. You must be exhausted from all of that work - you are on break after all. Once rested, map out an excursion and plan to attend 1 of 6 upcoming OPN Specialized sessions. These will walk you through the steps you need to take to become Specialized. Once completed, reflect on your journey and join OPN Specialized while the promotional pricing is still available. Just like any other trip, you want to know what others are saying about the destination - listen in as Judson talks about the OPN Specialized Webcast series: Feel free to add your own ingredients to this recipe and don't forget to reach out to the Oracle Partner Business Center with any of your questions on OPN Specialized. Happy Spring Break, The OPN Communications Team

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• Make Your Clock Creates a Custom Clock for your Android Homescreen

  - by ETC

  If you’d like to create a custom clock face your Android homescreen Make Your Clock makes it easy to create a clock face with customized colors, font, display style, and more. You can create a clock that looks like a digital watch face, an old fashioned flip clock, a combination of digital output and date, and other variations. You can also adjust the size of the clock to anywhere between 1×1 to 4×2. Currently the app is limited to displaying the time and date, future releases are slated to include weather and lunar phases in addition to the time. Check out the video below to see the app in action: Make Your Clock [AppBrain via Yahoo!] Latest Features How-To Geek ETC How To Remove People and Objects From Photographs In Photoshop Ask How-To Geek: How Can I Monitor My Bandwidth Usage? Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Here’s a Super Simple Trick to Defeating Fake Anti-Virus Malware How to Change the Default Application for Android Tasks Stop Believing TV’s Lies: The Real Truth About "Enhancing" Images The Legend of Zelda – 1980s High School Style [Video] Suspended Sentence is a Free Cross-Platform Point and Click Game Build a Batman-Style Hidden Bust Switch Make Your Clock Creates a Custom Clock for your Android Homescreen Download the Anime Angels Theme for Windows 7 CyanogenMod Updates; Rolls out Android 2.3 to the Less Fortunate

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• Frank Ludolph's Last Day at Work

  - by mprove

  Hi Frank, today is your last day at Oracle. I cannot belief that retirement is an alternative to designing software and improving products for decades. I might figure it out myself in a couple of years. Our ways have crossed several times. And I am extremely thankful for that. I still remember my first session on an Apple Lisa. It must have been around 1985. I was still in school, and we were visiting the University of Hamburg to get some orientation on the departments. When I started I chose Informatics. And I suppose the Apple Lisa played a significant role in my decision. Is it fate that I later wrote about Apple Lisa? I’ve attended your presentation and public demo of the Lisa System at CHI ’98 in Los Angeles. Maybe a video still exists. I should look it up and publish it somewhere. You had also booth duty for Sun Microsystems – presenting HotJava Views, a user interface for a network computer. And you were handing out VHS tapes (!) of Starfire. I still have mine – but no player anymore. Then I joined Sun in 2002, and I guess I popped up in your office each time when I came to Santa Clara. The SEED mentoring program finally made it possible that we exchanged and discussed many ideas on the past and future of HCI. Dueling Interaction Models of Personal-Computing and Web-Computing at MEDICI 2007 is one of the results. But do you remember for instance also our jam session with Phil Clevenger on Hello World? Marvelous! I will miss you at Oracle. Enjoy your life and let’s stay in touch.Matthias

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• "Give with Bing" - Help raise money for Sports relief while searching for whatever you want

  - by Testas

  While Sport Relief drives fundraising by challenging people to do physical activities such as running a mile, we’re introducing the ‘Bing Search Mile,’ which gives people the ability to search using Bing and raise money for charity. For every 10 searches made, Bing.com will donate 5p to Sport Relief 2010, enabling you, and your friends and family, to raise money just by searching with Bing until the end of March. With the average mile taking about 10 minutes to run, in the same time, you can make up to 150 searches online - that’s 75p raised for a good cause per ‘search mile’. And while you’re at it,  why not step it up a gear and aim to complete a ‘Search Mile’ each day or even a ‘Search Marathon’ over the 5 week campaign with your colleagues, friends and family? How to get involved: 1.      Visit GiveWithBing.com and download the Official Sport Relief Bing Counter. Once downloaded, the Sport Relief counter will count all the searches you do on Bing from that point on.  2.      Now that you’re registered (and signed in), invite your friends, family, colleagues or classmates to join in the fundraising with you – GiveWithBing.com automatically generates an email explaining how it works for you to send them – the more people who search with you, the more money you raise. People can also register a school 3.      Run your ‘search mile’ every day and watch how your searches turn into life-changing cash for charity, with every 10 searches equalling 5p for Sport Relief. You can check your progress by visiting your individual page (more info here).  This is such a positive initiative and I challenge everyone in the UK to invite their key contacts to be part of Give with Bing.   Chris

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• How to become a professional web developer from a C/C++ programmer?

  - by user1050165

  I am new here. This is my first post on stackoverflow. I am currently a high school student and know how to use Pascal and C/C++ to take part in competitions such as the Informatics in Olympiad. I have learnt data structure and many algorithms to solve various kinds of problems. Now, I want to move on to become a web developer. However, I know web development is quite different from competitive programming. To make a web application, I have to master HTML, Database, Backend programming etc. But these are all look like separate pieces of information. I don't know where to start and what order should I follow. Anybody who can give a comprehensive list of learning points? I know there are HTML, Ruby on Rails, CSS and Javascript. What else? More importantly, can someone give a brief outline of their relationship? I hope I can get help from you asap. Thanks!

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• Computer Science Programming Certificate vs. Computer Science Degree?

  - by Jess

  I'm kind of in a tough spot. My current living conditions require that I work a full-time job while attending school. I've attended a UC in the past but had to withdraw my junior year due to financial issues at home. I currently work an entry-level IT corp job but I'm looking to further my salary/skills by getting a degree, or a programming certificate like this one: http://www.lavc.edu/voced1/CSITCertCSP/CSITCertFrameCSP.htm Herein lies the problem. I prefer getting a CS degree from an accredited university but I looked at the schedules for classes and it is impossible to work around my current 40/hr work week. There are random morning classes, with the occasional evening class, but the times get even more construed as I move my way up to the upper divisions. So what I guess I'm trying to get at is, can anyone lay out the pros and cons of obtaining a certificate vs. the degree (besides obvious points like the latter being 100x better)? I'm aware that having a degree is always going to be a better route, but...is the programming certificate useless? Should I not even bother?

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• Future Air Plane – A new world

  - by Rekha

  For the first time in my life, I wished I had more number of years to live. The world has evolved from the cave man life to the man who is almost The Creator. When I was about 12 years old, I was taken to Chennai Planetarium for my school excursion. That day we were made to lie down in a dark room and the ceiling was full of stars and planets. All those were just videos but the day still stands in my mind. Same kind of experience in real is waiting for our future generations.Even though the English movies have gone beyond imaginations, we still have chances to bring those imaginations to real. You must be wondering why all these hype. Recently Airbus unveiled a news on transparent Airplane in 2050. This Airplane will have a body transparent to view the sky from all sides of the airplane when we are flying high above the grounds. And it will have all possible technologies under one roof that would give immense pleasure for the passengers. The journey would be an unforgettable one for each one of us. Image and News Credit: Daily Telegraph This article titled,Future Air Plane – A new world, was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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• Suspended Sentence is a Free Cross-Platform Point and Click Game

  - by Asian Angel

  Do you want a fun point and click game to play on your favorite operating system? Then get ready to play Suspended Sentence! In the game you are woken from cryogenic sleep to assist in repairing the ship you are traveling on. Can you successfully complete the repairs and get your prison sentence suspended in return? Note: Suspended Sentence is available for Linux, Windows, and Mac. Suspended Sentence Homepage [via OMG! Ubuntu!] Access the Walkthrough for Suspended Sentence Latest Features How-To Geek ETC How To Remove People and Objects From Photographs In Photoshop Ask How-To Geek: How Can I Monitor My Bandwidth Usage? Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Here’s a Super Simple Trick to Defeating Fake Anti-Virus Malware How to Change the Default Application for Android Tasks Stop Believing TV’s Lies: The Real Truth About "Enhancing" Images The Legend of Zelda – 1980s High School Style [Video] Suspended Sentence is a Free Cross-Platform Point and Click Game Build a Batman-Style Hidden Bust Switch Make Your Clock Creates a Custom Clock for your Android Homescreen Download the Anime Angels Theme for Windows 7 CyanogenMod Updates; Rolls out Android 2.3 to the Less Fortunate

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• Optimizing lifestyle and training

  - by Gabe

  I am a college freshman who has recently discovered a passion for computer science. Having had my first lick of formal python training last semester, I have cast aside my previously hedonist way of life and tunneled my sights on becoming the most rounded and proficient programmer I can be. I know that I'm taking strides in the right direction (I've stopped smoking, I've been exercising every day, I've taught myself C++ and OpenGL, and I've begun training in kung-fu and meditation), yet I am still finding myself struggling to achieve satisfactory results. I would like to be able to spend a good 3-4 hours every day burning through textbooks. I have the time cleared and the resources allocated. The problem lies in the logistics-- I have never taken anything seriously before. Recently I've realized that I am clueless when it comes to taking care of myself and gaining control of my mind, and it drastically hinders my productivity. My question is this: How can I learn to manage my time and take care of myself such that I can spend the maximum amount of time every day studying with steady concentration? Personal tricks would be key here: techniques you use to get yourself to sleep, a diet that yields focus, even computer break stretching routines or active reading techniques. Anything you could think of here would be great. I was a low-life in high school and I have the drive to turn my life around, I'm just quite a bit behind in the way of good habits :)

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• Life and Career guidance

  - by Andrei TheGiant Haxtor

  Hello programmers. I have a current dilemma I'm pondering over. I will be graduating from high school with ~60 credits worth of community college work (pre-engineering courses), and I am wondering what would experienced programmers suggest I do with my time since I have all of the bull courses out of the way. Should I start taking computer science/engineering courses or should I take some other courses that interest me?(psych, math) The reason I am asking this is, well , I like doing a lot of self studying, especially relating to software and tech. I don't like to have the pressure of hard classes on me, so I could make up for the time lost doing the CC courses and dive deep in programming and books. I've started getting into programming recently unfortunately, since I didn't have much time b/c of my course load. Right now I am doing Java and messing around with android. I would like to get involved in web&mobile development, operating systems, and finance software. If any of you experienced people could please give me some guidance and words of wisdom, I would greatly appreciated. Sorry that this isn't necessarily related to programming. All the best.

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• Does it matter the direction of a Huffman's tree child node?

  - by Omega

  So, I'm on my quest about creating a Java implementation of Huffman's algorithm for compressing/decompressing files (as you might know, ever since Why create a Huffman tree per character instead of a Node?) for a school assignment. I now have a better understanding of how is this thing supposed to work. Wikipedia has a great-looking algorithm here that seemed to make my life way easier. Taken from http://en.wikipedia.org/wiki/Huffman_coding: Create a leaf node for each symbol and add it to the priority queue. While there is more than one node in the queue: Remove the two nodes of highest priority (lowest probability) from the queue Create a new internal node with these two nodes as children and with probability equal to the sum of the two nodes' probabilities. Add the new node to the queue. The remaining node is the root node and the tree is complete. It looks simple and great. However, it left me wondering: when I "merge" two nodes (make them children of a new internal node), does it even matter what direction (left or right) will each node be afterwards? I still don't fully understand Huffman coding, and I'm not very sure if there is a criteria used to tell whether a node should go to the right or to the left. I assumed that, perhaps the highest-frequency node would go to the right, but I've seen some Huffman trees in the web that don't seem to follow such criteria. For instance, Wikipedia's example image http://upload.wikimedia.org/wikipedia/commons/thumb/8/82/Huffman_tree_2.svg/625px-Huffman_tree_2.svg.png seems to put the highest ones to the right. But other images like this one http://thalia.spec.gmu.edu/~pparis/classes/notes_101/img25.gif has them all to the left. However, they're never mixed up in the same image (some to the right and others to the left). So, does it matter? Why?

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• GRE subject Computer science

  - by Maddy.Shik

  How do I prepare for the GRE Computer Science subject test? Are there any standard text books I should follow? Agree that its under graduation level and one doesn't need to dig to deep for it. I have done my computer engineering from a college who ranks in top 20 in India. So may be my curriculum has not been that good as compared to international students. Since now i want to get admission in to world renowned university's Ph. D. program. I want to enhance my basic skills up to a level to beat other international students in competition. I want to know good book references which are recommended by professors in international school like CMU, MIT, Standford etc. Like for Algorithms Coreman is considered very good. Good books builds concepts from very basic so that one doesn't need to mug up even a basic concepts. Coreman is just too good with good blend of Mathematics and programming concepts. Definitely Test paper are must but that can be practiced once one has read text books thoroughly. Besides its been 2 years i passed out from college so its is essential for me to revise all concepts from text books. Please tell me standard text books for each subject like Computer Architecture, Database Design, Operating Systems, Discrete Maths etc.

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• OBJECT_Name parameters and dbid

  - by steveh99999

  If you've been using SQL Server for a long time, you may have been used to using the OBJECT_NAME system function in the past - especially useful when converting table IDs into table names when querying sysobjects and sysindexes..... However, if you're an old-school DBA  - did you know since SQL 2005 service pack 2 it  accepts a  second parameter ? database_id.. For example, this can be used to summarize some useful information from sys.dm_exec_query_stats. When reviewing SQL Server performance - it can be useful to look at the most heavily used stored procedures rather than inefficient less frequently used procedures.  Here's a query to summarize performance data on the most-heavily used stored procedures across all databases on a server  :-SELECT TOP 20 DENSE_RANK() OVER (ORDER BY SUM(execution_count) DESC) AS rank, OBJECT_NAME(qt.objectid, qt.dbid) AS 'proc name', (CASE WHEN qt.dbid = 32767 THEN 'mssqlresource' ELSE DB_NAME(qt.dbid) END ) AS 'Database', OBJECT_SCHEMA_NAME(qt.objectid,qt.dbid) AS 'schema', SUM(execution_count) AS 'TotalExecutions',SUM(total_worker_time) AS 'TotalCPUTimeMS', SUM(total_elapsed_time) AS 'TotalRunTimeMS', SUM(total_logical_reads) AS 'TotalLogicalReads',SUM(total_logical_writes) AS 'TotalLogicalWrites', MIN(creation_time) AS 'earliestPlan', MAX(last_execution_time) AS 'lastExecutionTime' FROM sys.dm_exec_query_stats qs CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) AS qt WHERE OBJECT_NAME(qt.objectid, qt.dbid) IS NOT NULL GROUP BY OBJECT_NAME(qt.objectid, qt.dbid),qt.dbid,OBJECT_SCHEMA_NAME(qt.objectid,qt.dbid)      

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• Am I too young to burn out?

  - by Steve McMesse

  I feel like I have burned out, even though I am only out of college for 5 years. For the first 3 years of my career, things were going awesome. I was never anything special in school, but I felt special at my company. Looking back, I could tell that I made all the right moves: I actively tried to improve myself daily. I made a point of helping anyone I could. I made a point (and read books about) being a good team member. I had fun. After 3 years in a row as being rated as a top employee, I converted that political capital into choosing to work on an interesting, glamorous project with only 2 developers: me and a highly respected senior technical leader. I worked HARD on that project, and it came out a huge success. High in quality, low in bugs, no delays, etc. The senior tech lead got a major promotion and a GIGANTIC bonus. I got nothing. I was so disappointed that I just stopped caring. Over the last year, I have just kind of floated. During my first 4 years I felt energized after a 10 hour day. Now I can barely be bothered to work 6 hours a day. Any advice? I don't even know what I'm asking. I am just hoping smart people see this and drop me a few pieces of wisdom.

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