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  • WebLogic Weekly for June 20th, 2011

    - by james.bayer
    Welcome the first the first edition of the WebLogic Weekly.  The WebLogic Server team has been trying to extend our community outreach to new mediums like an Oracle WebLogic Youtube Channel (how-to videos and feature showcases), Twitter (sharing WebLogic links, typically blogs), and a Facebook page to do a better job sharing information, providing learning alternatives to product documentation and perhaps most importantly collecting feedback from all of our users using the tools they prefer.  This is our attempt to provide a round-up what has been going on in WebLogic over the past week.  If you would like to have something shared here, use the #weblogic tag on tweets, post on the Oracle WebLogic facebook page, or comment on these blog entries. Blogs WebLogic Server: Listing Groups of an Authenticated User by Steve Button Weblogic, QBrowser And Topics by Eric Elzinga Weblogic, Topics And (Non)-Durable Subscribers by Eric Elzinga Database Web Service using Toplink DB Provider by Vishal Jain WebLogic Server – Use the Execution Context ID in Applications – Lessons From Hansel and Gretel by James Bayer Getting All Server’s Lifecycle State in a Domain by Jay SenSharma Steps to Move Messages From One Queue To Another Queue Using WLST (Updated Version) by Ravish Mody Events If you want to share a story of something innovative you or your organization has done with WebLogic Server or other Fusion Middleware, you could win a pass to Oracle Open World 2011 and share the story there.  See Ruma Sanyal's posting on the Application Grid blog for details.  The deadline for submissions is July 22nd, 2011.

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  • ArchBeat Link-o-Rama for 2012-03-23

    - by Bob Rhubart
    Why is Java EE 6 better than Spring? | Arun Gupta blogs.oracle.com "While Spring was revolutionary in its time and is still very popular and quite main stream in the same way Struts was circa 2003, it really is last generation's framework," says Arun Gupta. "Some people are even calling it legacy." OWSM vs. OEG - When to use which component - 11g | Prakash Yamuna blogs.oracle.com Prakash Yamuna shares a brief but informative summary. Webcast Q&A: Demystifying External Authorization blogs.oracle.com The slide deck, a transcript of the audience Q&A, and a link to replay of the recent Oracle Entitlements Server webcast featuring Tanya Baccam from SANS Institute. Anil Gaur on Cloud Computing Support in Java EE 7 www.infoq.com InfoQ's Srini Penchikala talks with Anil Gaur, Vice President of Software Development at Oracle, about cloud computing support in Java EE 7, project road map and timeline, cloud API in Java EE 7, and cloud development and deployment tools. Want to Patch your Red Hat Linux Kernel Without Rebooting? | Lenz Grimmer blogs.oracle.com Lenz Grimmer shares info an resources for those interested in learning more about KSplice. Oracle Linux Newsletter, March Edition www.oracle.com Get a spring dose of Linux goodness. Oracle Enterprise Gateway: Integration with Oracle Service Bus and Oracle Web Services Manager www.oracle.com Oracle Enterprise Gateway and Oracle Web Services Manager are central points of a SOA initiative when security is paramount. In this article, William Markito Oliveira and Fabio Mazanatti describe how to integrate these products with Oracle Service Bus. Thought for the Day "We always strain at the limits of our ability to comprehend the artifacts we construct — and that's true for software and for skyscrapers." — James Gosling

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  • Craftsmanship is ALL that Matters

    - by Wayne Molina
    Today, I'm going to talk about a touchy subject: the notion of working in a company that doesn't use the prescribed "best practices" in its software development endeavours.  Over the years I have, using a variety of pseudonyms, asked this question on popular programming forums.  Although I always add in some minor variation of the story to avoid suspicion that it's the same person posting, the crux of the tale remains the same: A Programmer’s Tale A junior software developer has just started a new job at an average company, creating average line-of-business applications for internal use (the most typical scenario programmers find themselves in).  This hypothetical newbie has spent a lot of time reading up on the "theory" of software development, devouring books, blogs and screencasts from well-known and respected software developers in the community in order to broaden his knowledge and "do what the pros do".  He begins his new job, eager to apply what he's learned on a real-world project only to discover that his new teammates doesn't use any of those concepts and techniques.  They hack their way through development, or in a best-case scenario use some homebrew, thrown-together semblance of a framework for their applications that follows not one of the best practices suggested by the “elite” in the software community - things like TDD (TDD as a "best practice" is the only subjective part of this post, but it's included here due to a very large following of respected developers who consider it one), the SOLID principles, well-known and venerable tools, even version control in a worst case and truly nightmarish scenario.  Our protagonist is frustrated that he isn't doing things the "proper" way - a way he's spent personal time digesting and learning about and, more importantly, a way that some of the top developers in the industry advocate - and turns to a forum to ask the advice of his peers. Invariably the answer I, in the guise of the concerned newbie, will receive is that A) I don't know anything and should just shut my mouth and sling code the bad way like everybody else on the team, and B) These "best practices" are fade or a joke, and the only thing that matters is shipping software to your customers. I am here today to say that anyone who says this, or anything like it, is not only full of crap but indicative of exactly the type of “developer” that has helped to give our industry a bad name.  Here is why: One Who Knows Nothing, Understands Nothing On one hand, you have the cognoscenti of the .NET development world.  Guys like James Avery, Jeremy Miller, Ayende Rahien and Rob Conery; all well-respected and noted programmers that are pretty much our version of celebrities.  These guys write blogs, books, and post videos outlining the "correct" way of writing software to make sure it not only works but is maintainable and extensible and a joy to work with.  They tout the virtues of the SOLID principles, or of using TDD/BDD, or using a mature ORM like NHibernate, Subsonic or even Entity Framework. On the other hand, you have Joe Everyman, Lead Software Developer at Initrode Corporation - in our hypothetical story Joe is the junior developer's new boss.  Joe's been with Initrode for 10 years, starting as the company’s very first programmer and over the years building up a little fiefdom of his own until at the present he’s in charge of all Initrode’s software development.  Joe writes code the same way he always has, without bothering to learn much, if anything.  He looked at NHibernate once and found it was "too hard", so he uses a primitive implementation of the TableDataGateway pattern as a wrapper around SqlClient.SqlConnection and SqlClient.SqlCommand instead of an actual ORM (or, in a better case scenario, has created his own ORM); the thought of using LINQ or Entity Framework or really anything other than his own hastily homebrew solution has never occurred to him.  He doesn't understand TDD and considers “testing” to be using the .NET debugger to step through code, or simply loading up an app and entering some values to see if it works.  He doesn't really understand SOLID, and he doesn't care to.  He's worked as a programmer for years, and that's all that counts.  Right?  WRONG. Who would you rather trust?  Someone with years of experience and who writes books, creates well-known software and is akin to a celebrity, or someone with no credibility outside their own minute environment who throws around their clout and company seniority as the "proof" of their ability?  Joe Everyman may have years of experience at Initrode as a programmer, and says to do things "his way" but someone like Jeremy Miller or Ayende Rahien have years of experience at companies just like Initrode, THEY know ten times more than Joe Everyman knows or could ever hope to know, and THEY say to do things "this way". Here's another way of thinking about it: If you wanted to get into politics and needed advice on the best way to do it, would you rather listen to the mayor of Hicktown, USA or Barack Obama?  One is a small-time nobody while the other is very well-known and, as such, would probably have much more accurate and beneficial advice. NOTE: The selection of Barack Obama as an example in no way, shape, or form suggests a political affiliation or political bent to this post or blog, and no political innuendo should be mistakenly read from it; the intent was merely to compare a small-time persona with a well-known persona in a non-software field.  Feel free to replace the name "Barack Obama" with any well-known Congressman, Senator or US President of your choice. DIY Considered Harmful I will say right now that the homebrew development environment is the WORST one for an aspiring programmer, because it relies on nothing outside it's own little box - no useful skill outside of the small pond.  If you are forced to use some half-baked, homebrew ORM created by your Director of Software, you are not learning anything valuable you can take with you in the future; now, if you plan to stay at Initrode for 10 years like Joe Everyman, this is fine and dandy.  However if, like most of us, you want to advance your career outside a very narrow space you will do more harm than good by sticking it out in an environment where you, to be frank, know better than everybody else because you are aware of alternative and, in almost most cases, better tools for the job.  A junior developer who understands why the SOLID principles are good to follow, or why TDD is beneficial, or who knows that it's better to use NHibernate/Subsonic/EF/LINQ/well-known ORM versus some in-house one knows better than a senior developer with 20 years experience who doesn't understand any of that, plain and simple.  Anyone who disagrees is either a liar, or someone who, just like Joe Everyman, Lead Developer, relies on seniority and tenure rather than adapting their knowledge as things evolve. In many cases, the Joe Everymans of the world act this way out of fear - they cannot possibly fathom that a “junior” could know more than them; after all, they’ve spent 10 or more years in the same company, doing the same job, cranking out the same shoddy software.  And here comes a newbie who hasn’t spent 10+ years doing the same things, with a fresh and often radical take on the craft, and Joe Everyman is afraid he might have to put some real effort into his career again instead of just pointing to his 10 years of service at Initrode as “proof” that he’s good, or that he might have to learn something new to improve; in most cases the problem is Joe Everyman, and by extension Initrode itself, has a mentality of just being “good enough”, and mediocrity is the rule of the day. A Thorn Bush is No Place for a Phoenix My advice is that if you work on a team where they don't use the best practices that some of the most famous developers in our field say is the "right" way to do things (and have legions of people who agree), and YOU are aware of these practices and can see why they work, then LEAVE the company.  Find a company where they DO care about quality, and craftsmanship, otherwise you will never be happy.  There is no point in "dumbing" yourself down to the level of your co-workers and slinging code without care to craftsmanship.  In 95% of these situations there will be no point in bringing it to the attention of Joe Everyman because he won't listen; he might even get upset that someone is trying to "upstage" him and fire the newbie, and replace someone with loads of untapped potential with a drone that will just nod affirmatively and grind out the tasks assigned without question. Find a company that has people smart enough to listen to the "best and brightest", and be happy.  Do not, I repeat, DO NOT waste away in a job working for ignorant people.  At the end of the day software development IS a craft, and a level of craftsmanship is REQUIRED for any serious professional.  When you have knowledgeable people with the credibility to back it up saying one thing, and small-time people who are, to put it bluntly, nobodies in the field saying and doing something totally different because they can't comprehend it, leave the nobodies to their own devices to fade into obscurity.  Work for a company that uses REAL software engineering techniques and really cares about craftsmanship.  The biggest issue affecting our career, and the reason software development has never been the respected, white-collar career it was meant to be, is because hacks and charlatans can pass themselves off as professional programmers without following a lick of good advice from programmers much better at the craft than they are.  These modern day snake-oil salesmen entrench themselves in companies by hoodwinking non-technical businesspeople and customers with their shoddy wares, end up in senior/lead/executive positions, and push their lack of knowledge on everybody unfortunate enough to work with/for/under them, crushing any dissent or voices of reason and change under their tyrannical heel and leaving behind a trail of dismayed and, often, unemployed junior developers who were made examples of to keep up the facade and avoid the shadow of doubt being cast upon them. To sum this up another way: If you surround yourself with learned people, you will learn.  Surround yourself with ignorant people who can't, as the saying goes, see the forest through the trees, and you'll learn nothing of any real value.  There is more to software development than just writing code, and the end goal should not be just "shipping software", it should be shipping software that is extensible, maintainable, and above all else software whose creation has broadened your knowledge in some capacity, even if a minor one.  An eager newbie who knows theory and thirsts for knowledge can easily be moulded and taught the advanced topics, but the same can't be said of someone who only cares about the finish line.  This industry needs more people espousing the benefits of software craftsmanship and proper software engineering techniques, and less Joe Everymans who are unwilling to adapt or foster new ways of thinking. Conclusion - I Cast “Protection from Fire” I am fairly certain this post will spark some controversy and might even invite the flames.  Please keep in mind these are opinions and nothing more.  A little healthy rant and subsequent flamewar can be good for the soul once in a while.  To paraphrase The Godfather: It helps to get rid of the bad blood.

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  • Aging vs. Coding Skills

    - by Renan Malke Stigliani
    A little background, since it can be part of my point fo view. I'm a C#/Java programmer with age of 23, coding since my 18's. I started studying C and working with Cobol, and after 1 year I quickly moved to C#/Java Web Development, and have worked with it in about 3/4 companies. (I've just moved again) In my (brief) professional career I encountered some older programmers, all the times it was very hard to work with them, since I was way better programmer than they. And it is not about just the language skills, some of them had seriously problems understanding basic logic. Now I wonder how theese programmer get jobs on the market since (I imagine) they have more expenses, and thus have to make more money, and are really counter-productives. In theese examples, others project member have to constantly keep stoping for helping them out. All the times, they eventually quit... So I wonder... May the aging process slow down the learning rate and logic thinking? Does the programmer has to, or at least should, move to a management area before getting old? Please, my intention is not to be disrespectful with older persons. I am fully aware that this is NOT the case of all older programmers, I often see around very good old programmers on the net, I just never met them for close.

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  • Creating Java Neural Networks

    - by Tori Wieldt
    A new article on OTN/Java, titled “Neural Networks on the NetBeans Platform,” by Zoran Sevarac, reports on Neuroph Studio, an open source Java neural network development environment built on top of the NetBeans Platform. This article shows how to create Java neural networks for classification.From the article:“Neural networks are artificial intelligence (machine learning technology) suitable for ill-defined problems, such as recognition, prediction, classification, and control. This article shows how to create some Java neural networks for classification. Note that Neuroph Studio also has support for image recognition, text character recognition, and handwritten letter recognition...”“Neuroph Studio is a Java neural network development environment built on top of the NetBeans Platform and Neuroph Framework. It is an IDE-like environment customized for neural network development. Neuroph Studio is a GUI that sits on top of Neuroph Framework. Neuroph Framework is a full-featured Java framework that provides classes for building neural networks…”The author, Zoran Sevarac, is a teaching assistant at Belgrade University, Department for Software Engineering, and a researcher at the Laboratory for Artificial Intelligence at Belgrade University. He is also a member of GOAI Research Network. Through his research, he has been working on the development of a Java neural network framework, which was released as the open source project Neuroph.Brainy stuff. Read the article here.

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  • Building Simple Workflows in Oozie

    - by dan.mcclary
    Introduction More often than not, data doesn't come packaged exactly as we'd like it for analysis. Transformation, match-merge operations, and a host of data munging tasks are usually needed before we can extract insights from our Big Data sources. Few people find data munging exciting, but it has to be done. Once we've suffered that boredom, we should take steps to automate the process. We want codify our work into repeatable units and create workflows which we can leverage over and over again without having to write new code. In this article, we'll look at how to use Oozie to create a workflow for the parallel machine learning task I described on Cloudera's site. Hive Actions: Prepping for Pig In my parallel machine learning article, I use data from the National Climatic Data Center to build weather models on a state-by-state basis. NCDC makes the data freely available as gzipped files of day-over-day observations stretching from the 1930s to today. In reading that post, one might get the impression that the data came in a handy, ready-to-model files with convenient delimiters. The truth of it is that I need to perform some parsing and projection on the dataset before it can be modeled. If I get more observations, I'll want to retrain and test those models, which will require more parsing and projection. This is a good opportunity to start building up a workflow with Oozie. I store the data from the NCDC in HDFS and create an external Hive table partitioned by year. This gives me flexibility of Hive's query language when I want it, but let's me put the dataset in a directory of my choosing in case I want to treat the same data with Pig or MapReduce code. CREATE EXTERNAL TABLE IF NOT EXISTS historic_weather(column 1, column2) PARTITIONED BY (yr string) STORED AS ... LOCATION '/user/oracle/weather/historic'; As new weather data comes in from NCDC, I'll need to add partitions to my table. That's an action I should put in the workflow. Similarly, the weather data requires parsing in order to be useful as a set of columns. Because of their long history, the weather data is broken up into fields of specific byte lengths: x bytes for the station ID, y bytes for the dew point, and so on. The delimiting is consistent from year to year, so writing SerDe or a parser for transformation is simple. Once that's done, I want to select columns on which to train, classify certain features, and place the training data in an HDFS directory for my Pig script to access. ALTER TABLE historic_weather ADD IF NOT EXISTS PARTITION (yr='2010') LOCATION '/user/oracle/weather/historic/yr=2011'; INSERT OVERWRITE DIRECTORY '/user/oracle/weather/cleaned_history' SELECT w.stn, w.wban, w.weather_year, w.weather_month, w.weather_day, w.temp, w.dewp, w.weather FROM ( FROM historic_weather SELECT TRANSFORM(...) USING '/path/to/hive/filters/ncdc_parser.py' as stn, wban, weather_year, weather_month, weather_day, temp, dewp, weather ) w; Since I'm going to prepare training directories with at least the same frequency that I add partitions, I should also add that to my workflow. Oozie is going to invoke these Hive actions using what's somewhat obviously referred to as a Hive action. Hive actions amount to Oozie running a script file containing our query language statements, so we can place them in a file called weather_train.hql. Starting Our Workflow Oozie offers two types of jobs: workflows and coordinator jobs. Workflows are straightforward: they define a set of actions to perform as a sequence or directed acyclic graph. Coordinator jobs can take all the same actions of Workflow jobs, but they can be automatically started either periodically or when new data arrives in a specified location. To keep things simple we'll make a workflow job; coordinator jobs simply require another XML file for scheduling. The bare minimum for workflow XML defines a name, a starting point, and an end point: <workflow-app name="WeatherMan" xmlns="uri:oozie:workflow:0.1"> <start to="ParseNCDCData"/> <end name="end"/> </workflow-app> To this we need to add an action, and within that we'll specify the hive parameters Also, keep in mind that actions require <ok> and <error> tags to direct the next action on success or failure. <action name="ParseNCDCData"> <hive xmlns="uri:oozie:hive-action:0.2"> <job-tracker>localhost:8021</job-tracker> <name-node>localhost:8020</name-node> <configuration> <property> <name>oozie.hive.defaults</name> <value>/user/oracle/weather_ooze/hive-default.xml</value> </property> </configuration> <script>ncdc_parse.hql</script> </hive> <ok to="WeatherMan"/> <error to="end"/> </action> There are a couple of things to note here: I have to give the FQDN (or IP) and port of my JobTracker and NameNode. I have to include a hive-default.xml file. I have to include a script file. The hive-default.xml and script file must be stored in HDFS That last point is particularly important. Oozie doesn't make assumptions about where a given workflow is being run. You might submit workflows against different clusters, or have different hive-defaults.xml on different clusters (e.g. MySQL or Postgres-backed metastores). A quick way to ensure that all the assets end up in the right place in HDFS is just to make a working directory locally, build your workflow.xml in it, and copy the assets you'll need to it as you add actions to workflow.xml. At this point, our local directory should contain: workflow.xml hive-defaults.xml (make sure this file contains your metastore connection data) ncdc_parse.hql Adding Pig to the Ooze Adding our Pig script as an action is slightly simpler from an XML standpoint. All we do is add an action to workflow.xml as follows: <action name="WeatherMan"> <pig> <job-tracker>localhost:8021</job-tracker> <name-node>localhost:8020</name-node> <script>weather_train.pig</script> </pig> <ok to="end"/> <error to="end"/> </action> Once we've done this, we'll copy weather_train.pig to our working directory. However, there's a bit of a "gotcha" here. My pig script registers the Weka Jar and a chunk of jython. If those aren't also in HDFS, our action will fail from the outset -- but where do we put them? The Jython script goes into the working directory at the same level as the pig script, because pig attempts to load Jython files in the directory from which the script executes. However, that's not where our Weka jar goes. While Oozie doesn't assume much, it does make an assumption about the Pig classpath. Anything under working_directory/lib gets automatically added to the Pig classpath and no longer requires a REGISTER statement in the script. Anything that uses a REGISTER statement cannot be in the working_directory/lib directory. Instead, it needs to be in a different HDFS directory and attached to the pig action with an <archive> tag. Yes, that's as confusing as you think it is. You can get the exact rules for adding Jars to the distributed cache from Oozie's Pig Cookbook. Making the Workflow Work We've got a workflow defined and have collected all the components we'll need to run. But we can't run anything yet, because we still have to define some properties about the job and submit it to Oozie. We need to start with the job properties, as this is essentially the "request" we'll submit to the Oozie server. In the same working directory, we'll make a file called job.properties as follows: nameNode=hdfs://localhost:8020 jobTracker=localhost:8021 queueName=default weatherRoot=weather_ooze mapreduce.jobtracker.kerberos.principal=foo dfs.namenode.kerberos.principal=foo oozie.libpath=${nameNode}/user/oozie/share/lib oozie.wf.application.path=${nameNode}/user/${user.name}/${weatherRoot} outputDir=weather-ooze While some of the pieces of the properties file are familiar (e.g., JobTracker address), others take a bit of explaining. The first is weatherRoot: this is essentially an environment variable for the script (as are jobTracker and queueName). We're simply using them to simplify the directives for the Oozie job. The oozie.libpath pieces is extremely important. This is a directory in HDFS which holds Oozie's shared libraries: a collection of Jars necessary for invoking Hive, Pig, and other actions. It's a good idea to make sure this has been installed and copied up to HDFS. The last two lines are straightforward: run the application defined by workflow.xml at the application path listed and write the output to the output directory. We're finally ready to submit our job! After all that work we only need to do a few more things: Validate our workflow.xml Copy our working directory to HDFS Submit our job to the Oozie server Run our workflow Let's do them in order. First validate the workflow: oozie validate workflow.xml Next, copy the working directory up to HDFS: hadoop fs -put working_dir /user/oracle/working_dir Now we submit the job to the Oozie server. We need to ensure that we've got the correct URL for the Oozie server, and we need to specify our job.properties file as an argument. oozie job -oozie http://url.to.oozie.server:port_number/ -config /path/to/working_dir/job.properties -submit We've submitted the job, but we don't see any activity on the JobTracker? All I got was this funny bit of output: 14-20120525161321-oozie-oracle This is because submitting a job to Oozie creates an entry for the job and places it in PREP status. What we got back, in essence, is a ticket for our workflow to ride the Oozie train. We're responsible for redeeming our ticket and running the job. oozie -oozie http://url.to.oozie.server:port_number/ -start 14-20120525161321-oozie-oracle Of course, if we really want to run the job from the outset, we can change the "-submit" argument above to "-run." This will prep and run the workflow immediately. Takeaway So, there you have it: the somewhat laborious process of building an Oozie workflow. It's a bit tedious the first time out, but it does present a pair of real benefits to those of us who spend a great deal of time data munging. First, when new data arrives that requires the same processing, we already have the workflow defined and ready to run. Second, as we build up a set of useful action definitions over time, creating new workflows becomes quicker and quicker.

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  • How to Switch Mac OS X to Use OpenDNS or Google DNS

    - by The Geek
    Are you still using your service provider’s DNS servers? If you’re on Comcast, you probably noticed their DNS servers completely died recently, taking down the internet—but anybody using the more reliable OpenDNS or Google DNS had no problems. Here’s how to set it up on your Mac OS X computer. There’s lots of other reasons to use OpenDNS or Google DNS other than just their rock-solid reliability—they are often much faster than your ISP’s DNS server, and in the case of OpenDNS, there’s loads of extra features like content filtering, typo correction, anti-phishing, and child protection controls. If you’re using Windows, be sure and check out some of our other articles on the subject: Speed Up Your Web Browsing with Google Public DNS Easily Add OpenDNS To Your Router Protect Your Kids Online Using Open DNS Otherwise, keep reading for how to set it up on your Mac. Latest Features How-To Geek ETC The Complete List of iPad Tips, Tricks, and Tutorials The 50 Best Registry Hacks that Make Windows Better The How-To Geek Holiday Gift Guide (Geeky Stuff We Like) LCD? LED? Plasma? The How-To Geek Guide to HDTV Technology The How-To Geek Guide to Learning Photoshop, Part 8: Filters Improve Digital Photography by Calibrating Your Monitor Exploring the Jungle Ruins Wallpaper Protect Your Privacy When Browsing with Chrome and Iron Browser Free Shipping Day is Friday, December 17, 2010 – National Free Shipping Day Find an Applicable Quote for Any Programming Situation Winter Theme for Windows 7 from Microsoft Score Free In-Flight Wi-Fi Courtesy of Google Chrome

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  • Oracle Technology Network Virtual Developer Day: Service Oriented Architecture (SOA)

    - by programmarketingOTN
    Register now! Oracle Technology Network Virtual Developer Day: Service Oriented Architecture (SOA) - Discover the Power of Oracle SOA Suite 11gTuesday July 12, 2011 - ?9:00 a.m. PT – 1:30 p.m. PT / 12 Noon EDT - 4:30 p.m. EDTOTN is proud to host another Virtual Developer Day, this time focusing on SOA (click here to check out on-demand version of Rich Enterprise Applications and WebLogic)  Save yourself/company some money and join us online for this hands-on virtual workshop. Through developer-focused product presentations and demonstrations delivered by Oracle product and technology experts, there is no faster or more efficient way to jumpstart your Oracle SOA suite learning.Over the course of the Virtual Developer Day, you will learn how an SOA approach can be implemented, whether starting fresh with new services or reusing existing services. Using Oracle SOA Suite 11g components, you will explore, modify, execute, and monitor an SOA composite application. Topics include SCA, BPEL process execution, adapters, business rules and more.Java and WebLogic experience not required for the presentations or demonstrations but it is a plus for the hands-on lab.Come to this event if you are    •    Exploring ways to deliver services faster    •    Integrating packaged and/or legacy applications    •    Developing service orchestration    •    Planning or starting new development projectsRegister online now for this FREE event.AGENDA - Tuesday July 12, 2011?9:00 a.m. PT – 1:30 p.m. PT / 12 Noon EDT - 4:30 p.m. PT EDT  Time  Title  9:00 AM Keynote  9:15 AM Presentation 1 Service Oriented Architecture (SOA) Overview  9:45 AM Demonstration 1 Mediator and Adapters  10:15 AM Presentation 2 BPEL Service Orchestration and Business Rules  10:45 AM Demonstration 2 BPEL Service Orchestration  11:15 AM Demonstration 3 Oracle Business Rules  11:45 AM Hands-on Lab time  1:30 PM Close Register online now for this FREE event.

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  • Power Dynamic Database-Driven Websites with MySQL & PHP

    - by Antoinette O'Sullivan
    Join major names among MySQL customers by learning to power dynamic database-driven websites with MySQL & PHP. With the MySQL and PHP: Developing Dynamic Web Applications course, in 4 days, you learn how to develop applications in PHP and how to use MySQL efficiently for those applications! Through a hands-on approach, this instructor-led course helps you improve your PHP skills and combine them with time-proven database management techniques to create best-of-breed web applications that are efficient, solid and secure. You can currently take this course as a: Live Virtual Class (LVC): There are a number events on the schedule to suit different timezones in January 2013 and March 2013. With an LVC, you get to follow this live instructor-led class from your own desk - so no travel expense or inconvenience. In-Class Event: Travel to an education center to attend this class. Here are some events already on the scheduled:  Where  When  Delivery Language  Lisbon, Portugal  15 April 2013  European Portugese  Porto, Portugal 15 April 2013   European Portugese  Barcelona, Spain 28 February 2013  Spanish  Madrid, Spain 4 March 2013   Spanish If you do not see an event that suits you, register your interest in an additional date/location/delivery language. If you want more indepth knowledge on developing with MySQL and PHP, consider the MySQL for Developers course. For full details on these and all courses on the authentic MySQL curriculum, go to http://oracle.com/education/mysql.

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  • #1 O’Reilly eBook for 2010

    - by Jan Goyvaerts
    The year-end issue of O’Reilly’s author newsletter discussed the trends O’Reilly has been seeing the past few years, and their predictions for 2011. The key trend is that digital is now more than ever poised to take over print: Our digitally distributed products have grown from 18.36% of our publishing mix in 2009 to 28.09% of our mix in 2010. What is more impressive is that our digitally distributed products have produced more than double the revenue that has been lost with the decline of print. I think this is important because some say that digital cannibalizes print products. Our data indicates the contrary, as print is declining much more slowly than digital is growing. I think we may be seeing developers purchasing a print book, and then purchasing the electronic editions to search and copying code from, as the incremental cost for digital is more than reasonable. My own book seems to be leading this trend. Thanks to everyone who purchased it! And the five bestselling O’Reilly ebook products for 2010: 1) Regular Expressions Cookbook, 2) jQuery Cookbook, 3) Learning Python, 4) HTML5: Up and Running, and 5) JavaScript Cookbook. I think it’s interesting that the top five ebooks are code-intensive books. They’re great products for search and code reuse. It’s also interesting that none of the top 5 ebooks made the top 5 of print books.

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  • SQL SERVER – Microsoft SQL Server 2014 CTP1 Product Guide

    - by Pinal Dave
    Today in User Group meeting there were lots of questions related to SQL Server 2014. There are plenty of people still using SQL Server 2005 but everybody is curious about what is coming in SQL Server 2014.  Microsoft has officially released SQL Server 2014 CTP1 Product Guide. You can easily download the product guide and explore various learning around SQL Server 2014 as well explore the new concepts introduced in this latest version. This SQL Server 2014 CTP1 Product Guide contains few interesting White Papers, a Datasheet and Presentation Deck. Here is the list of the white papers: Mission-Critical Performance and Scale with SQL Server and Windows Server Faster Insights from Any Data Platform for Hybrid Cloud SQL Server In-Memory OLTP Internals Overview for CTP1 SQL Server 2014 CTP1 Frequently Asked Questions for TechEd 2013 North America Here is the list of slide decks: SQL Server 2014 Level 100 Deck SQL Server 2014 Mission Critical Performance LEvel 300 Deck SQL Server 2014 Faster Insights from Any Data Level Level 300 Deck SQL Server 2014 Platform for Hybrid Cloud Level 100 Deck I have earlier downloaded the Product Guide and I have yet not completed reading everything SQL Server 2014 has to offer. If you want to read what are the features which I am going to use in SQL Server 2014, you can read over here. Download Microsoft SQL Server 2014 CTP1 Product Guide Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Documentation, SQL Download, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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  • Microsoft Security Essentials 2.0 Kills Viruses Dead. Download It Now.

    - by The Geek
    Microsoft’s Security Essentials has been our favorite anti-malware application for a while—it’s free, unobtrusive, and it doesn’t slow your PC down, but now it’s even better with the new 2.0 release, which adds network filtering, heuristic protection, and more. Just to be clear and direct with you: we absolutely recommend Microsoft Security Essentials as your anti-malware / anti-virus utility over any other option—and how can you argue? It’s totally free! New Features in 2.0 Here’s all of the new features in the latest release, which make it even more of a must-download: Network Traffic Inspection integrates into the network system and monitors the traffic at a low level without slowing down your PC, so it can actually detect threats before they get to your PC.   Internet Explorer Integration blocks malicious scripts before IE even starts running them—clearly a big security advantage.  Heuristic Scanning Engine finds malware that hasn’t been previously detected by scanning for certain types of attacks. This provides even more protection than just through virus definitions.   These new features make MSE on par with other anti-malware applications, especially the heuristic scanning, which has been the only complaint that anybody could make against MSE in the past—but now it has it Latest Features How-To Geek ETC The Complete List of iPad Tips, Tricks, and Tutorials The 50 Best Registry Hacks that Make Windows Better The How-To Geek Holiday Gift Guide (Geeky Stuff We Like) LCD? LED? Plasma? The How-To Geek Guide to HDTV Technology The How-To Geek Guide to Learning Photoshop, Part 8: Filters Improve Digital Photography by Calibrating Your Monitor The Spam Police Parts 1 and 2 – Goodbye Spammers [Videos] Snow Angels Theme for Windows 7 Exploring the Jungle Ruins Wallpaper Protect Your Privacy When Browsing with Chrome and Iron Browser Free Shipping Day is Friday, December 17, 2010 – National Free Shipping Day Find an Applicable Quote for Any Programming Situation

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  • UPK Professional Customer Success Story: Medtronic

    - by [email protected]
    In case you missed the live event, be sure to listen to last week's UPK Customer iSeminar featuring Medtronic. This was the first iSeminar in our quarterly series to showcase UPK Professional (UPK and Knowledge Pathways). Donna Miller and Staci Gilbert gave viewers an inside look at samples of Medtronic's content as they shared their experiences, methodology and best practices for use of the solution. Here are some highlights of the call: • Medtronic initially purchased UPK Professional to support a multi-year, global SAP rollout for 9,000 end users located in 24 countries. • As time went on, they expanded their use of UPK Professional to include several of their other enterprise applications: PeopleSoft, Siebel CRM, Hyperion Financial Management, a number of SAP bolt-ons, Documentum, TrackWise, and many others. • In combination with their Saba LMS, UPK Professional has allowed Medtronic to create, deploy, track and certify consistent end user training for critical transactions and processes across their organization worldwide - essential for a company in a heavily regulated industry. • For key pieces of content or certain end user populations, some Medtronic business units localize/translate the global UPK content. Staci demonstrated examples of their SAP content which has been translated into Japanese. • In the live SAP environment, end users rely on UPK's context sensitive in-application performance support. Medtronic has found this to be very helpful post go-live, giving just-in-time support so end users are confident in a new system or when performing tasks they don't often touch (at quarter or year end). UPK also serves as Medtronic's internal Google. • Medtronic has realized savings on many fronts: reduction in support calls due to in-application performance support, elimination of their training clients, and speedier training (1.5 days rather than 5-7 days) of temporary workers by moving from ILT to a blended solution that includes UPK simulations for eLearning. Thanks again to Donna and Staci for an exceptional presentation. They offered so many great examples for anyone who's looking for ways to get more out of UPK or interested in learning about UPK Professional: Knowledge Pathways. - Karen Rihs, Oracle UPK Outbound Product Management

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  • How should I start with Lisp?

    - by Gary Rowe
    I've been programming for years now, working my way through various iterations of Blub (BASIC, Assembler, C, C++, Visual Basic, Java, Ruby in no particular order of "Blub-ness") and I'd like to learn Lisp. However, I have a lot of intertia what with limited time (family, full time job etc) and a comfortable happiness with my current Blub (Java). So my question is this, given that I'm someone who would really like to learn Lisp, what would be the initial steps to get a good result that demonstrates the superiority of Lisp in web development? Maybe I'm missing the point, but that's how I would initially see the application of my Lisp knowledge. I'm thinking "use dialect A, use IDE B, follow instructions on page C, question your sanity after monads using counsellor D". I'd just like to know what people here consider to be an optimal set of values for A, B, C and perhaps D. Also some discussion on the relative merit of learning such a powerful language as opposed to, say, becoming a Rails expert. Just to add some more detail, I'll be developing on MacOS (or a Linux VM) - no Windows based approaches will be necessary, thanks. Notes for those just browsing by I'm going to keep this question open for a while so that I can offer feedback on the suggestions after I've been able to explore them. If you happen to be browsing by and feel you have something to add, please do. I would really welcome your feedback. Interesting links Assuming you're coming at Lisp from a Java background, this set of links will get you started quickly. Using Intellij's La Clojure plugin to integrate Lisp (videocast) Lisp for the Web Online version of Practical Common Lisp (c/o Frank Shearar) Land of Lisp a (+ (+ very quirky) game based) way in but makes it all so straightforward

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  • printable PHP manual - 'all but the Function Reference section'

    - by JW01
    My Motivation I find it easier to learn things by reading 'offline'. I'd like to lean back and read the narrative part of a paper version of the official php manual. My Scuppered Plan My plan was to download the manual, print all but the Function Reference section and then read it. I have downloaded the "Single HTML file" version of the manual from the php.net download page. (That version did not contain any images, so I patched-in the ones from the Many HTML files version with no problem.) My plan was to open that "Single HTML file" in an HTML editor, delete the Function Reference section then print it out. Unfortunately, although I have tried three different editors, I have not been able to successfully load-up that massive html file to be able to edit it. Its about (~40MB). I started to look into the phpdoc framework with a view to rendering my own html docs from the source...but that's a steep learning curve for a newby..and is a last resort. I would use a file splitter, but they tend to split files crudely with no regard for html/xml/xhtml sematics. So the question is... Does anyone know know where you can download the php manual in a version that is a kind of half-way house between the 'Single HTML file' and the 'Many HTML files'? Ideally with the docs split into 3 parts: File 1 - stuff before the function reference File 2 - function reference File 3 - stuff after the function reference Or Can you suggest any editors/tools will enable me to split up this file myself?

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  • WCI Analytics Installation / Configuration Support Webinar

    - by brian.harrison
    Based on the success of the OAM / WCI integration webinar, the second in our series of Technical Support "brown bag" webinars will be delivered on Tuesday, March 30 at 8AM Pacific Daylight Time. Please review the details below, if you would like to attend the webinar, please take a moment to send an email to the address provided for registration and you will be enrolled in the meeting. What are the best practices for installing and configuring Analytics for the WebCenter Interaction (formerly "ALUI") Portal Application? What are some of the most common failures that occur in this implementation and what can be done to correct these common issues? What are the most common reasons for the tables to be "empty" when I try to produce utilization reports? These are just some of the main areas that will be covered in this one hour webinar which will demonstrate the WCI Analytics installation and configuration in action. Our demonstration will focus on areas where Technical Support sees the largest numbers of customer questions become support incidents in an effort to help avoid the need to create an incident to get the implementation working properly in the customer environment. We will demonstrate the most recent version of WCI Analytics (10.3.0.1) for this presentation, but naturally specific issues known to specific versions will be covered as well. Please join us for what we know will be a valuable and relevant learning session. If you would like to attend this session please send an email to [email protected] indicating your interest, and we will respond to you with a meeting invitation including all of the required access information.

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  • Kinect Presentation at Chippewa Valley Code Camp

    - by mbcrump
    On November 12th 2011, I gave a presentation at Chippewa Valley Code Camp titled, “Kinecting the Dots with the Kinect SDK”. As promised, here is the Slides / Code / Resources to my talk. (click image to download slides) The Kinect for Windows SDK beta is a starter kit for applications developers that includes APIs, sample code, and drivers. This SDK enables the academic research and enthusiast communities to create rich experiences by using Microsoft Xbox 360 Kinect sensor technology on computers running Windows 7. Resources : Download Kinect for Windows SDK beta 2 – You can either download a 32 or 64 bit SDK depending on your OS. FAQ for Kinect for Windows SDK Beta 2 Kinect for Windows SDK Quickstarts for Windows SDK Beta 2 Information on upgrading Kinect Applications to MS SDK Beta 2. – Brand new post by me on how to upgrade Kinect applications to Beta 2. Getting the Most out of the Kinect SDK by me for the Microsoft MVP Award Program Blog. My “Busy Developers Guide to the Kinect SDK” (still references Beta 1 – but most information is still valid) Helpful toolkits / templates mentioned in the talk. Coding4Fun Kinect Toolkit – Lots of extension methods and controls for WPF and WinForms. KinectContrib – Visual Studio 2010 Templates (not updated for Beta 2 as of 11/14/2011). Fun Projects for learning purposes (all updated to Beta 2): Kinect Mouse Cursor – Use your hands to control things like a mouse created by Brian Peek. Kinect Paint – Basically MS Paint but use your hands! Kinecting the Dots: Adding Buttons to your Kinect Application (not on Beta 2 – but check out the guide by me on how to do this) Thanks for attending! I had a really great time at the event and would like to personally thank everyone for coming out to support the local community.  Thanks for reading. Subscribe to my feed

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  • Oracle’s Java Community Outreach Plan

    - by Yolande Poirier
    As the steward of Java, Oracle recognizes the importance and value of the Java community, and the relevant role it plays in keeping Java the largest, most vibrant developer community in the world.   In order to increase Oracle’s touch with Java developers worldwide, we are shifting our focus from a flagship JavaOne event followed by several regional JavaOne conferences, to a new outreach model which continues with the JavaOne flagship event, as well as a mix of online content, regional Java Tours, and regional 3rd party event participation.  1. JavaOne JavaOne continues to remain the premier hub for Java developers where you are given the opportunity to improve your Java technical skills, and interact with other members of the Java community. JavaOne is centered on open collaboration and sharing, and Oracle will continue to invest in JavaOne as a unique stand-alone event for the Java community. Oracle recognizes that many developers cannot attend JavaOne in person, therefore Oracle will share the wealth of the unique event material to those developers through a new and easy-to-access online Java program. While online JavaOne content cannot address the importance of actual face-to-face community/developer engagements and networking, online content does aide in extending the Java technical learning opportunity to a broader collection of developers. 2. Java Developer Day Tours Oracle will execute regional Java Developer Days with recognized Java User Groups (JUGs) with participation from Java Evangelist and Java Champions. This allows local, regional specific Java topics to be addressed both by Oracle and the Java community. In addition, Oracle will deliver more virtual technical content programs to reach developers where an existing JUG may not have a presence. 3. Sponsorship of Community-Driven Regional Events/Conferences Oracle also recognizes that improved community dialog and relations are achievable by continued Oracle sponsorship and onsite participation at both established/well-recognized 3rd party events and new emerging/growing 3rd party events. Oracle’s ultimate goal is to be an even better steward for Java by reaching more of the Java ecosystem with face-to-face and online community engagements. We look forward to planning tours and events with you, members of the Java community.

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  • MySQL for Beginners Training-on-Demand First Hand Insight

    - by Antoinette O'Sullivan
    The MySQL for Beginners course is THE course to get you started with MySQL providing you a solid foundation in relational databases using MySQL as a learning tool. Oracle University recently released the Training-on-Demand option for this course.  Ben Krug from the MySQL product team is trying out the MySQL for Beginners Training-on-Demand course and reporting on his experience. You can follow Ben on MySQL Support Blogs. The MySQL for Beginners course is available as: Training-on-Demand: Follow streaming video of instructor delivery and perform hands-on exercises as your own pace. You can start training with 24 hours of purchase. Live-Virtual: Attend a live-instructor led class from your own desk. Hundreds of events on the schedule across timezones. In-Class: Travel to an education center to attend this instructor-led class. Some events on the schedule below:  Location  Date  Delivery Language  Warsaw, Poland  24 September 2012  Polish  Dublin, Ireland  15 October 2012  English  London, United Kingdom  11 September 2012  English  Rome, Italy  5 November 2012  Italian  Hamburg, Germany  3 December 2012  German  Lisbon, Portugal  5 November 2012  European Portugese  Amsterdam, Netherlands  10 December 2012  Dutch  Nieuwegein, Netherlands  18 February 2013  Dutch  Nairobi, Kenya  12 November 2012  English  Barcelona, Spain  5 November 2012  Spanish  Madrid, Spain  8 January 2013  Spanish  Latvia, Riga  12 November 2012  Latvian  Petaling Jaya, Malaysia  22 October 2012  English  Ottawa, Toronto and Montreal Canada  17 December 2012  English  Sao Paulo, Brazil  11 September 2012  Brazilian Portugese  Sao Paulo, Brazil  5 November 2012  Brazilian Portugese  For more information on the Authentic MySQL Curriculum, go to the Oracle University Portal - http://oracle.com/education/mysql

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  • How is IntelliJ better than Eclipse?

    - by NickC
    I know there have been questions like What is your favorite editor/IDE?, but none of them have answered this question: Why spend the money on IntelliJ when Eclipse is free? I'm personally a big IntelliJ fan, but I haven't really tried Eclipse. I've used IntelliJ for projects that were Java, JSP, HTML/CSS, Javascript, PHP, and Actionscript, and the latest version, 9, has been excellent for all of them. Many coworkers in the past have told me that they believe Eclipse to be "pretty much the same" as IntelliJ, but, to counter that point, I've occasionally sat behind a developer using Eclipse who's seemed comparably inefficient (to accomplish roughly the same task), and I haven't experienced this with IntelliJ. They may be on par feature-by-feature but features can be ruined by a poor user experience, and I wonder if it's possible that IntelliJ is easier to pick up and discover time-saving features. For users who are already familiar with Eclipse, on top of the real cost of IntelliJ, there is also the cost of time spent learning the new app. Eclipse gets a lot of users who simply don't want to spend $250 on an IDE. If IntelliJ really could help my team be more productive, how could I sell it to them? For those users who've tried both, I'd be very interested in specific pros or cons either way.

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  • Win a Free License for Windows 7 Ultimate or Silverlight Spy at Our West Palm Beach .Net User Group

    - by Sam Abraham
    Shervin Shakibi, Microsoft Regional Director, ASP.Net MVP and Microsoft Certified Trainer will be our speaker at our West Palm Beach .Net User Group May meeting,  Shervin founded the FlaDotNet Users Group Network to which our West Palm Beach .Net User Group belongs. Shervin will be talking to us about the new features of Silverlight 4.0. I am personally looking forward to attending this event as I have always found Shervin's talks fun and a great learning experience.   At the end of our meeting, we will be having a free raffle. We will be giving away 1 free Windows 7 Ultimate license and 2 free Silverlight Spy licenses as well as several books and other giveaways. Usually, everybody goes home with a freebie.  We will also continue having ample networking time while enjoying free pizza/soda sponsored by Sherlock Technology and SISCO Corporation who is a new sponsor of our group.   Koen Zwikstra, Silverlight MVP and Founder of First Floor Software has kindly offered the West Palm Beach .Net User Group several free licenses of Silverlight Spy to raffle during our meetings. We will start by raffling two copies during our May meeting.   Silverlight Spy is a very valuable tool in debugging Silverlight applications. It has been mentioned at MIX10 ( http://firstfloorsoftware.com/blog/silverlight-spy-at-mix10/) as well as by Microsoft Community Leaders (http://blogs.msdn.com/chkoenig/archive/2008/08/29/silverlight-spy.aspx)   I am using Silverlight Spy myself and will probably be using it to demonstrate Silverlight internals during my talks. I think Koen's gift to our group will bring great value to our fortunate members who end up winning the licenses. Thank you Koen for your kind gift and looking forward to meeting you all on May 25th 2010 6:30 PM at CompTec (http://www.fladotnet.com/Reg.aspx?EventID=462)   Sam Abraham Site Director - West Palm Beach .Net User Group

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  • SQL SERVER – A Puzzle – Fun with SEQUENCE in SQL Server 2012 – Guess the Next Value

    - by pinaldave
    Yesterday my friend Vinod Kumar wrote excellent blog post on SQL Server 2012: Using SEQUENCE. I personally enjoyed reading the content on this subject. While I was reading the blog post, I thought of very simple new puzzle. Let us see if we can try to solve it and learn a bit more about Sequence. Here is the script, which I executed. USE TempDB GO -- Create sequence CREATE SEQUENCE dbo.SequenceID AS BIGINT START WITH 3 INCREMENT BY 1 MINVALUE 1 MAXVALUE 5 CYCLE NO CACHE; GO -- Following will return 3 SELECT next value FOR dbo.SequenceID; -- Following will return 4 SELECT next value FOR dbo.SequenceID; -- Following will return 5 SELECT next value FOR dbo.SequenceID; -- Following will return which number SELECT next value FOR dbo.SequenceID; -- Clean up DROP SEQUENCE dbo.SequenceID; GO Above script gave me following resultset. 3 is the starting value and 5 is the maximum value. Once Sequence reaches to maximum value what happens? and WHY? Bonus question: If you use UNION between 2 SELECT statement which uses UNION, it also throws an error. What is the reason behind it? Can you attempt to answer this question without running this code in SQL Server 2012. I am very confident that irrespective of SQL Server version you are running you will have great learning. I will follow up of the answer in comments below. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Puzzle, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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  • Time Travel 101

    - by Jim Duffy
    I’m thinking maybe I should have used Time Crunching 101 as the title instead… or maybe ‘Duh Duffy, where have you been? Everyone knows that!” Ok, so maybe you won’t actually learn how to travel through time from this post but you will learn how to cram more learning into one day. We all know you can’t make it to every conference, every presentation, or every training session. The good news is that many of those events make their content available to either watch online or to download for off-line viewing. The problem is who has time to sit and watch all those presentations in real time? Not me. One trick I use is to view the content at an increased play rate. Why listen to a boring speaker like me drone on for the entire length of the session when you can listen to them drone on in almost half the time. :-) I view nearly all off-line content with Windows Media Player though I’m sure you can implement this idea with any media playback software. The idea is changing the playback speed you view the content at. With Windows Media Player you can change the play speed from the menu system. Once you have the Play Speed Setting panel open you can specify the playback speed. Depending on the content and the presenter I can typically listen between 1.6 and 2.0 times normal speed. My Florida edumacation taught me that playing the video back at twice the speed means I’ll listen to it twice as fast and that means I can view it in almost 1/2 the time.  Too bad it won’t make me twice as smart. :-) I hope this helps you speed your way through more training content. Have a day. :-|

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  • Nervous about the "real" world

    - by Randy
    I am currently majoring in Computer Science and minoring in mathematics (the minor is embedded in the major). The program has a strong C++ curriculum. We have done some UNIX and assembly language (not fun) and there is C and Java on the way in future classes that I must take. The program I am in did not use the STL, but rather a STL-ish design that was created from the ground up for the program. From what I have read on, the STL and what I have taken are very similar but what I used seemed more user friendly. Some of the programs that I had to write in C++ for assignments include: a password server that utilized hashing of the passwords for security purposes, a router simulator that used a hash table and maps, a maze solver that used depth first search, a tree traveler program that traversed a tree using levelorder, postorder, inorder, selection sort, insertion sort, bit sort, radix sort, merge sort, heap sort, quick sort, topological sort, stacks, queues, priority queues, and my least favorite, red-black trees. All of this was done in three semesters which was just enough time to code them up and turn them in. That being said, if I was told to use a stack to convert an equation to infix notation or something, I would be lost for a few hours. My main concern in writing this is when I graduate and land an interview, what are some of the questions posed to assess my skills? What are some of the most important areas of computer science that are prevalent in the field? I am currently trying to get some ideas of programs I can write in C++ that interest and challenge me to keep learning the language. A sodoku solver came to mind but am lost as to where to start. I apologize for the rant, but I'm just a wee bit nervous about the future. Any tips are appreciated.

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  • Scene Graph for Deferred Rendering Engine

    - by Roy T.
    As a learning exercise I've written a deferred rendering engine. Now I'd like to add a scene graph to this engine but I'm a bit puzzled how to do this. On a normal (forward rendering engine) I would just add all items (All implementing IDrawable and IUpdateAble) to my scene graph, than travel the scene-graph breadth first and call Draw() everywhere. However in a deferred rendering engine I have to separate draw calls. First I have to draw the geometry, then the shadow casters and then the lights (all to different render targets), before I combine them all. So in this case I can't just travel over the scene graph and just call draw. The way I see it I either have to travel over the entire scene graph 3 times, checking what kind of object it is that has to be drawn, or I have to create 3 separate scene graphs that are somehow connected to each other. Both of these seem poor solutions, I'd like to handle scene objects more transparent. One other solution I've thought of was traveling trough the scene graph as normal and adding items to 3 separate lists, separating geometry, shadow casters and lights, and then iterating these lists to draw the correct stuff, is this better, and is it wise to repopulate 3 lists every frame?

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