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  • Do you think that exposure to BASIC can mutilate your mind? [closed]

    - by bigown
    It is practically impossible to teach good programming to students that have had a prior exposure to BASIC: as potential programmers they are mentally mutilated beyond hope of regeneration -- Edsger W. Dijkstra I have deep respect to Dijkstra but I don't agree with everything he said/wrote. I disagree specially with this quote on linked paper wrote 35 years ago about the Dartmouth BASIC implementation. Many of my coworkers or friends programmers started with BASIC, questions below have answers that indicate many programmers had their first experience on programming at BASIC. AFAIK many good programmers started at BASIC programming. I'm not talking about Visual Basic or other "modern" dialects of BASIC running on machines full of resources. I'm talking about old times BASIC running on "toy" computer, that the programmer had to worry about saving small numbers that need not be calculated as a string to save a measly byte because the computer had only a few hundreds of them, or have to use computed goto for lack of a more powerful feature, and many other things which require the programmer to think much before doing something and forcing the programmer to be creative. If you had experience with old time BASIC on a machine with limited resources (have in mind that a simple micro-controller today has much more resources than a computer in 1975, do you think that BASIC help your mind to find better solutions, to think like an engineer or BASIC drag you to dark side of programming and mutilated you mentally? Is good to learn a programming language running on a computer full of resources where the novice programmer can do all wrong and the program runs without big problems? Or is it better to learn where the programmer can't go wrong? What can you say about the BASIC have helped you to be a better/worse programmer? Would you teach old BASIC running on a 2KB (virtual) machine to a coming programmer? Sure, only exposure to BASIC is bad. Maybe you share my opinion that modern BASIC doesn't help too much because modern BASIC, as long other programming languages, gives facilities which allow the programmer doesn't think deeper. Additional information: Why BASIC?

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  • Windows Azure Learning Plan - Application Fabric

    - by BuckWoody
    This is one in a series of posts on a Windows Azure Learning Plan. You can find the main post here. This one deals with the Application Fabric for Windows Azure. It serves three main purposes - Access Control, Caching, and as a Service Bus.   Overview and Training Overview and general  information about the Azure Application Fabric, - what it is, how it works, and where you can learn more. General Introduction and Overview http://msdn.microsoft.com/en-us/library/ee922714.aspx Access Control Service Overview http://msdn.microsoft.com/en-us/magazine/gg490345.aspx Microsoft Documentation http://msdn.microsoft.com/en-gb/windowsazure/netservices.aspx Learning and Examples Sources for online and other Azure Appllications Fabric training Application Fabric SDK http://www.microsoft.com/downloads/en/details.aspx?FamilyID=39856a03-1490-4283-908f-c8bf0bfad8a5&displaylang=en Application Fabric Caching Service Primer http://blogs.msdn.com/b/appfabriccat/archive/2010/11/29/azure-appfabric-caching-service-soup-to-nuts-primer.aspx?wa=wsignin1.0 Hands-On Lab: Building Windows Azure Applications with the Caching Service http://www.wadewegner.com/2010/11/hands-on-lab-building-windows-azure-applications-with-the-caching-service/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+WadeWegner+%28Wade+Wegner+-+Technical%29 Architecture  Azure Application Fabric Internals and Architectures for Scale Out and other use-cases. Azure Application Fabric Architecture Guide http://blogs.msdn.com/b/yasserabdelkader/archive/2010/09/12/release-of-windows-server-appfabric-architecture-guide.aspx Windows Azure AppFabric Service Bus - A Deep Dive (Video) http://www.msteched.com/2010/Europe/ASI410 Access Control Service (ACS) High Level Architecture http://blogs.msdn.com/b/alikl/archive/2010/09/28/azure-appfabric-access-control-service-acs-v-2-0-high-level-architecture-web-application-scenario.aspx Applications  and Programming Programming Patterns and Architectures for SQL Azure systems. Various Examples from PDC 2010 on using Azure Application as a Service Bus http://tinyurl.com/2dcnt8o Creating a Distributed Cache using the Application Fabric http://blog.structuretoobig.com/post/2010/08/31/Creating-a-Poor-Mane28099s-Distributed-Cache-in-Azure.aspx  Azure Application Fabric Java SDK http://jdotnetservices.com/

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  • SQL Cruise Alaska 2011

    - by Grant Fritchey
    I had the extreme good fortune to get sent on the last SQL Cruise to Alaska. I love my job. In case you don't what this is, SQL Cruise is a trip on a cruise ship during which you get to attend classes while on the boat, learning all about SQL Server and related topics as well as network with the instructors and the other Cruisers. Frankly, it's amazing. Classes ran from Monday, 5/30, to Saturday, 6/4. The networking was constant, between classes, at night on cruise ship, out on excursions in Alaskan rainforests and while snorkeling in ocean waters. Here's a run down of the experience from my point of view. Because I couldn't travel out 2 days early, I missed the BBQ that occurred the day before the cruise when many of the Cruisers received their swag bags. Some of that swag came from Red Gate. I researched what was useful on a cruise like this and purchased small flashlights and binoculars for all the Cruisers. The flashlights were because, depending on your cabin, ships can be very dark. The binoculars were so that the cruisers could watch all the beautiful landscape as it flowed by. I would have liked to have been there when the bags were opened, but I heard from several people that they appreciated the gifts. Cruisers "In" the hot tub. Pictured: Marjory Woody, Michele Grondin, Kyle Brandt, Grant Fritchey, John Halunen Sunday I went to board the ship with my wife. We had a bit of an adventure because I messed up our documents. It all worked out and we got on board to meet up at the back of the boat at one of the outdoor bars with the other Cruisers, thanks to tweets letting everyone know where to go. That was the end of electronic coordination on the trip (connectivity in Alaska was horrible for everyone except AT&T). The Cruisers were a great bunch of people and it was a real honor to meet them and get to spend time with them. After everyone settled into their cabins, our very first activity was a contest, sponsored by Red Gate. The Cruisers, in an effort to get to know each other and the ship, were required to go all over taking various photographs, some of them hilarious. The winning team of three would all win prizes. Some of the significant others helped out and I tagged along with a team that tied for first but lost the coin toss. The winning team consisted of Christina Leo (blog|twitter), Ryan Malcom (twitter), Neil Hambly (blog|twitter). They then had to do math and identify the cabin with the lowest prime number, oh, and get a picture of it and be the first to get back up to the bar where we were waiting. Christina came in first and very happily carried home an Ipad2. Ryan won a 1TB portable hard drive and Neil won a wireless mouse (picture below, note my special SQL Server Central Friday Shirt. Thanks Steve (blog|twitter)). Winners: Christina Leo, Neil Hambly, Ryan Malcolm. Just Lucky: Grant Fritchey Monday morning classes started. Buck Woody (blog|twitter) was a special guest speaker on this cruise. His theme was "Three C's on the High Seas: Career, Communication and Cloud." The first session was all on Career. I'm not going to type out all my notes from the session, but let's just say, if you get the chance to hear Buck talk about how to manage your career, I suggest you attend. I have a ton of blog posts that I'll be putting together over the next several months (yes, months) both here and over on ScaryDBA. I also have a bunch of work I'm going to be doing to get my career performance bumped up a notch or two (and let's face it, that won't be easy). Later on Monday, Tim Ford (blog|twitter) did a session on DMOs. Specifically the session was on Tim's Period Table of DMOs that he has put together, and how to use some of the more interesting DMOs in your day to day job. It was a great session, packed with good information. Next, Brent Ozar (blog|twitter) did a session on how to monitor and guide SAN configuration for the DBA that doesn't have access to the SAN. That was some seriously useful information. Tuesday morning we only had a single class. Kendra Little (blog|twitter) taught us all about "No Lock for Yes Fun".  It was all about the different transaction isolation levels and how they work. There is so often confusion in this area and Kendra does a great job in clarifying the information. Also, she tosses in her excellent drawings to liven up the presentation. Then it was excursion time in Juneau. My wife and I, along with several other Cruisers, took a hike up around the Mendenhall Glacier. It was absolutely beautiful weather and walking through the Alaskan rain forest was a treat. Our guide, Jason, was a great guy and it was a good day of hiking. Wednesday was an all day excursion in Skagway. My wife and I took the "Ghost and Good Time Girls" walking tour that ended up at a bar that used to be a brothel, the Red Onion. It was a great history of the town. We went back out and hit a few museums and exhibits. We also hiked up the side of the mountain to see the Dewey Lake and some great views of the town. Finally we hiked out to the far side of town to see the Gold Rush cemetery. Hiking done we went back to the boat and had a quiet dinner on our own. Thursday we cruised through Glacier Bay and saw at least four different glaciers including sitting next to the Marjory Glacier for  about an hour. It was amazing. Then it got better. We went into class with Buck again, this time to talk about Communication. Again, I've got pages of notes that I'm going to be referring back to for some time to come. This was an excellent opportunity to learn. Snorkelers: Nicole Bertrand, Aaron Bertrand, Grant Fritchey, Neil Hambly, Christina Leo, John Robel, Yanni Robel, Tim Ford Friday we pulled into Ketchikan. A bunch of us went snorkeling. Yes, snorkeling. Yes, in Alaska. Yes, snorkeling in the ocean in Alaska. It was fantastic. They had us put on 7mm thick wet suits (an adventure all by itself) so it was basically warm the entire time we were in the water (except for the occasional squirt of cold water down my back). Before we got in the water a bald eagle flew up and landed about 15 feet in front of us, which was just an incredible event. Then our guide pointed out about 14 other eagles in the area, hanging out in the trees. Wow! The water was pretty clear and there was a ton of things to see. That was absolutely a blast. Back on the boat I presented a session called Execution Plans: The Deep Dive (note the nautical theme). It seemed to go over well and I had several good questions come out of the session that will lead to new blog posts. After I presented, it was Aaron Bertrand's (blog|twitter) turn. He did a session on "What's New in Denali" that provided a lot of great information. He was able to incorporate new things straight out of Tech-Ed, so this was expanded beyond his usual presentation. The man really knows what he's talking about and communicates it well. Saturday we were travelling so there was time for a bunch of classes. Jeremiah Peschka (blog|twitter) did a great overview of some of the NoSQL databases and what they should be used for. The session was called "The Database is Dead" but it was really about how there are specific uses for these databases that SQL Server doesn't fill, but also that these databases can't replace SQL Server in other areas. Again, good material. Brent Ozar presented again with a session on Defensive Indexing. It was an overview of how indexes work and a deep dive into how to apply them appropriately in your databases to better support access. A good session, as you would expect. Then we pulled into Victoria, BC, in Canada and had a nice dinner with several of the Cruisers, including Denny Cherry (blog|twitter). After that it was back to Seattle on Sunday. By the way, the Science Fiction Museum in Seattle isn't a Science Fiction Museum any more. I was very disappointed to discover this. Overall, it was a great experience. I'm extremely appreciative of Red Gate for sending me and for Tim, Brent, Kendra and Jeremiah for having me. The other Cruisers were all amazing people and it was an honor & privilege to meet them and spend time with them. While this was a seriously fun time, it was also a very serious training opportunity with solid information coming from seasoned industry pros.

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  • Unused Indexes Gotcha

    - by DavidWimbush
    I'm currently looking into dropping unused indexes to reduce unnecessary overhead and I came across a very good point in the excellent SQL Server MVP Deep Dives book that I haven't seen highlighted anywhere else. I was thinking it was simply a case of dropping indexes that didn't show as being used in DMV sys.dm_db_index_usage_stats (assuming a solid representative workload had been run since the last service start). But Rob Farley points out that the DMV only shows indexes whose pages have been read or updated. An index that isn't listed in the DMV might still be useful by providing metadata to the Query Optimizer and thus streamlining query plans. For example, if you have a query like this: select  au.author_name         , count(*) as books from    books b         inner join authors au on au.author_id = b.author_id group by au.author_name If you have a unique index on authors.author_name the Query Optimizer will realise that each author_id will have a different author_name so it can produce a plan that just counts the books by author_id and then adds the author name to each row in that small table. If you delete that index the query will have to join all the books with their authors and then apply the GROUP BY - a much more expensive query. So be cautious about dropping apparently unused unique indexes.

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  • IOUG Webcast Series on Identity Management

    - by Tanu Sood
    Identity Management for Business Empowerment Identity Management has gone from the realm of IT tools to being a business solution. Security and Identity Management offer confidence in doing secure and compliant business. But more than that, Identity Management today contributes to business growth with secure social, cloud, mobile and internal & external ecosystem enablement. Cloud computing has heightened the interest in user access security, mobile computing brings access to information beyond the enterprise and a bring your own device culture in-house, social media has added a new dimension to user identity and increasing security compliance pressure has made organizations rethink their roles and entitlements strategy. To discuss the industry trends, maturity and framework for security, compliance and business empowerment with identity management, Oracle is proud to collaborate with IOUG to launch a series of live webcasts. Covering a span of topics from identity platform to entitlements managements, privilege access management and cloud, mobile and social security, these webcasts will provide direct access to subject matter experts and technology specialists. Hear first-hand about best practices, a pragmatic approach to security implementation, customer success stories and more. Register today for the individual webcasts or the series. And just a reminder that the conversation starts at COLLABORATE 12 in Las Vegas from April 22nd – 26th. In addition to our conference sessions, as an added value this year, we are offering a half-day deep dive session on Oracle Identity Management: Building a Security and Compliance Framework for Oracle Systems. The session is scheduled for Sunday, April 22nd from 9 am to 3 pm and will cover relevant topics such as: • A Primer on Identity Management • Security and Compliance with Oracle Identity Management • Security for Oracle Applications, Fusion Applications• Managing Identities in The Cloud and Mobile World • Best Practices: Building an Identity Roadmap and Getting Started To get a head start on your compliance and security program, pre-register for this session today.

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  • Userful Resources on ADF/JSF/JDEVELOPER

    - by vijaykumar.yenne
    In most of my interactions with the partner developer community who are working on either Webcenter Projects or ADF related Projects, there are constant questions that come up on the documentation or samples or step by step instructions for novices. Though most of the resources are available online on the OTN site, there seems to be a difficulty in getting hold of the right resource for their job to be done, which i am yet to solve. However here is a list of resources that you should have been to if you in the oracle world and building rich internet based applications using JSF/ADF. 1. If you have just started with JDeveloper and wanted to the different nuances of ADF developement and want to deepen your knowledge you should definitely go through these tutorials: http://www.oracle.com/technology/products/jdev/11/cuecards111/index.html 2. Everything about JDEV - includes the IDE download, demos, sample code, best practices etc. http://www.oracle.com/technology/products/jdev/index.html 3. All About ADF: http://www.oracle.com/technology/products/adf/index.html 4. Know more about ADF Faces : http://www.oracle.com/technology/products/adf/index.html 5. If you want to deepen your knowledge here is the aggregate list of all the blogs by our internal development teams and experts from around the globe. This is really an interesting feed especially when you want to do a deep dive on various aspects and want to be an expert in the oracle UI world. http://www.connotea.org/user/jdeveloper Last but not the least, you should always leverage the entire community whenever you run into any issues : http://forums.oracle.com

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  • "Are You There?".. India Tops Logistics List of Emerging Nations

    - by [email protected]
    It's just amazing how far, wide and deep modern supply chains are extending. AMR reported on 15 Apr (M.Burkett, A.Reese) in a SCM webcast that 'Penetrating Emerging Markets" was the top priotiy for organizations based on a recent survey. I took this as both adding new consumers to their prospect-list as well as leveraging 'lower cost labor arbitrage". (Read '3 Billion Capitalists") Supply Chain Quarterly reports that India and Brazil received the highest ranking of the logistics markets in developing nations India tops the list of emerging nations that scores the attractiveness of logistics markets to foreign investors. Developed by the UK-based research firm Transport Intelligence, the new  Emerging Market Logistics Index rated 38 developing countries on 3 factors. 1. "Market size and growth attractiveness," considered a country's economic output, projected growth rate, and population size.  2. "Market compatibility," which examined how well-matched a nation was with the services offered by global logistics providers. This includes a country's security levels, market accessibility, foreign direct investment, distribution of wealth and population, and development of its service sector. 3. "Connectedness," which rated the efficiency of customs and border controls, liner shipping connections, and transportation infrastructure. India claimed the top spot due to its market size and growth prospects. Brazil is second because of its economic performance, good levels of market accessibility, and improving domestic and international transport connections. Are you there? For more information see www.transportintelligence.com/articles_papers. The top 10 emerging countries India Brazil Indonesia Mexico Russia Turkey United Arab Emirates Egypt Saudi Arabia Malaysia Source: Transport Intelligence, The Emerging Markets Logistics Index, March 2010

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  • How can i be sure that professional programming is not for me ?

    - by user17766
    Hello everybody I love programming, developing projects for hobby and learning new concepts. I am getting harder too much in current job Despite learnt many thing well. I can even hardly understand assigned tasks. I am asking why i am getting harder to myself. It may not my fault? Our architecture doesn't spend enough time to explain complicated sides of project for us or i am not enough smart one for understand fastly. Our architecture also doesn't know what kind of hell he is creating ? Seeing 3 level generic types and 4-5 level generic inheritance in domain model objects hell makes me think so really. It looks abusing concepts more than reduce complexity. Thinking that he hasn't experienced before such a big project while he is getting confused in problems of the project. May i am not in right company ? May i am not good programmer ? May i am really stupid ? Become good in programming concepts is not enough to deal big project's complications so someone should to tell me that i have to still effort too much even i am good programmer for adopting myself to any big project ? Also i had another bad experiences from previous job but my professional experiences is almost few months but i spend 2 years for learning and coding for fun and i really can say that i have well skills on OOP, Design Patterns, coding standards and deep knowledge in language currently used. Sometimes i am thinking to leave programming professionally and work in any lame job while doing programming just for hobby. Waiting suggestions and insights

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  • Help with complex MVVM (multiple views)

    - by jsjslim
    I need help creating view models for the following scenario: Deep, hierarchical data Multiple views for the same set of data Each view is a single, dynamically-changing view, based on the active selection Depending on the value of a property, display different types of tabs in a tab control My questions: Should I create a view-model representation for each view (VM1, VM2, etc)? 1. Yes: a. Should I model the entire hierarchical relationship? (ie, SubVM1, HouseVM1, RoomVM1) b. How do I keep all hierarchies in sync? (e.g, adding/removing nodes) 2. No: a. Do I use a huge, single view model that caters for all views? Here's an example of a single view Figure 1: Multiple views updated based on active room. Notice Tab control Figure 2: Different active room. Multiple views updated. Tab control items changed based on object's property. Figure 3: Different selection type. Entire view changes

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  • Microsoft C# Most Valuable Professional

    - by Robz / Fervent Coder
    Recently I was awarded the Microsoft Most Valuable Professional (MVP) for Visual C#. For those that don’t know it’s an annual award based on nominations from peers and Microsoft. Although there are just over 4,000 MVPs worldwide from all kinds of specializations, there are less than 100 C# MVPs in the US. There is more information at the site: https://mvp.support.microsoft.com The Microsoft MVP Award is an annual award that recognizes exceptional technology community leaders worldwide who actively share their high quality, real world expertise with users and Microsoft. With fewer than 5,000 awardees worldwide, Microsoft MVPs represent a highly select group of experts. MVPs share a deep commitment to community and a willingness to help others. To recognize the contributions they make, MVPs from around the world have the opportunity to meet Microsoft executives, network with peers, and position themselves as technical community leaders. Here is my profile: https://mvp.support.microsoft.com/default.aspx/profile/rob.reynolds I want to thank those that nominated me, without nominations this would never have happened. Thanks to Microsoft for liking me and finding my achievements and contributions to the community to be worth something. It’s good to know when you put in a lot of hard work that you get rewarded! I also want to thank many of the people I have worked with over the last 7 years. You guys have been great and I’m definitely standing on the shoulders of giants! Thanks to KDOT for giving me that first shot into professional programming and the experience and all of the training! A special thanks to @drusellers for kick starting me when I went stale in my learning back in 2007 and for always pushing me and bouncing ideas off of me. Without you I don’t think I would have made it this far. Thanks Alt.NET for keeping it fresh and funky! A very special thank you goes out to my wife for supporting me and locking me in the basement to work on all of my initiatives!

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  • Register Today for Upcoming Oracle Solaris Events!

    - by Terri Wischmann
    Don't miss out on the exciting upcoming events around Oracle Solaris 11!  Register today for one or all of them - Check out the events below and Register Today! Please join us for the next Oracle Solaris Developer Webinar: "Simplify Your Development Environment with Zones, ZFS & More" on 04/10 @ 9am PT by Eric Reid (Principal Software Engineer) and Stefan Schneider (Chief Technologist ISV-Engineering) Register Now! Check out the upcoming Free OTN Sys Admin Day on April 10th on the Oracle Santa Clara Campus. Full Day of Hands on Labs Training, Demos, and Presentations.  Come learn about Oracle Solaris 11, Oracle Solaris Studio, Oracle Technology Network and Oracle Enterprise Linux! Register Now! Attend the Oracle Solaris 11 Technical Track at the NLUUG Conference in The Netherlands: April 11th, 2012  - This year, the conference will focus on Operating System innovations. Come learn about the innovations Oracle Solaris 11 brings, with technical deep-dive talks presented by Oracle experts. For more information including the agenda click here

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  • ArchBeat Link-o-Rama for 11/22/2011

    - by Bob Rhubart
    A Brief Introduction on Migrating to an Oracle-based Cloud Environment | Tom Laszewski "Before you can start migrating to the cloud, you must define what the cloud means to you," says Tom Laszeski. "The cloud is not a specific software or hardware product; contrary to what many technology vendors would have you believe." Custom Exception Registration for ADF BC EO Attribute | Andrejus Baranovskis "Sometimes customers prefer to implement business logic validation completely in Java, without using ADF BC declarative/Groovy validation rules," says Oracle ACE Director Andrejus Baranovskis. "Thats fine, we can code business logic validation in ADF and implement different custom validation methods on VO/EO level." Oracle Exadata Virtual Conference - Jan 20 2012 The Exadata SIG, along with IOUG, is organizing the First Exadata Virtual Conference, to be held on January 20, 2012. Proposals for presentations are now being accepted. Smooth Sailing or Rough Waters: Navigating Policy Administration Modernization | Helen Pitts "It’s no surprise that fueling growth, both now and in the future, continues to be a key driver for modernization" says Helen Pitts. "Why? Inflexible, hard-coded, legacy systems require customization by IT every time a change is required." Architects putting on the Ritz; Info integration book learning; Platform for SAS Grid Computing This week on the Architect Home Page on OTN. Webcast: Introducing Oracle WebLogic Server 12c: Developer Deep Dive - Dec 1 - 11am PT / 2pm ET Learn how Oracle WebLogic Server 12c enables rapid development of modern, lightweight Java EE 6 applications. Discover how you can leverage the latest development technologies, tools and standards when deploying to Oracle WebLogic Server across both conventional and Cloud environments. Architecture all day. Oracle Technology Network Architect Day - Phoenix, AZ - Dec14. Free registration. When: December 14, 2011 Where: The Ritz-Carlton, Phoenix, 2401 East Camelback Road, Phoenix, AZ 85016 Registration is free, but seating is limited.

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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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  • Continuous Integration using Docker

    - by Leon Mergen
    One of the main advantages of Docker is the isolated environment it brings, and I want to leverage that advantage in my continuous integration workflow. A "normal" CI workflow goes something like this: Poll repository for changes Pull from repository Install dependencies Run tests In a Dockerized workflow, it would be something like this: Poll repository for changes Pull from repository Build docker image Run docker image as container Run tests Kill docker container My problem is with the "run tests" step: since Docker is an isolated environment, intuitively I would like to treat it as one; this means the preferred method of communication are sockets. However, this only works well in certain situations (a webapp, for example). When testing different kind of services (for example, a background service that only communicated with a database), a different approach would be required. What is the best way to approach this problem? Is it a problem with my application's design, and should I design it in a more TDD, service-oriented way that always listens on some socket? Or should I just give up on isolation, and do something like this: Poll repository for changes Pull from repository Build docker image Run docker image as container Open SSH session into container Run tests Kill docker container SSH'ing into the container seems like an ugly solution to me, since it requires deep knowledge of the contents of the container, and thus break the isolation. I would love to hear SO's different approaches to this problem.

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  • Idea of an algorithm to detect a website's navigation structure?

    - by Uwe Keim
    Currently I am in the process of developing an importer of any existing, arbitrary (static) HTML website into the upcoming release of our CMS. While the downloading the files is solved successfully, I'm pulling my hair off when it comes to detect a site structure (pages and subpages) purely from the HTML files, without the user specifying additional hints. Basically I want to get a tree like: + Root page 1 + Child page 1 + Child page 2 + Child child page1 + Child page 3 + Root page 2 + Child page 4 + Root page 3 + ... I.e. I want to be able to detect the menu structure from the links inside the pages. This has not to be 100% accurate, but at least I want to achieve more than just a flat list. I thought of looking at multiple pages to see similar areas and identify these as menu areas and parse the links there, but after all I'm not that satisfied with this idea. My question: Can you imagine any algorithm when it comes to detecting such a structure? Update 1: What I'm looking for is not a web spider, but an algorithm do create a logical tree of the relationship of the pages to be able to create pages and subpages inside my CMS when importing them. Update 2: As of Robert's suggestion I'll solve this by starting at the root page, and then simply parse links as you go and treat every link inside a page simply as a child page. Probably I'll recurse not in a deep-first manner but rather in a breadth-first manner to get a more balanced navigation structure.

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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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  • Data structure for pattern matching.

    - by alvonellos
    Let's say you have an input file with many entries like these: date, ticker, open, high, low, close, <and some other values> And you want to execute a pattern matching routine on the entries(rows) in that file, using a candlestick pattern, for example. (See, Doji) And that pattern can appear on any uniform time interval (let t = 1s, 5s, 10s, 1d, 7d, 2w, 2y, and so on...). Say a pattern matching routine can take an arbitrary number of rows to perform an analysis and contain an arbitrary number of subpatterns. In other words, some patterns may require 4 entries to operate on. Say also that the routine (may) later have to find and classify extrema (local and global maxima and minima as well as inflection points) for the ticker over a closed interval, for example, you could say that a cubic function (x^3) has the extrema on the interval [-1, 1]. (See link) What would be the most natural choice in terms of a data structure? What about an interface that conforms a Ticker object containing one row of data to a collection of Ticker so that an arbitrary pattern can be applied to the data. What's the first thing that comes to mind? I chose a doubly-linked circular linked list that has the following methods: push_front() push_back() pop_front() pop_back() [] //overloaded, can be used with negative parameters But that data structure seems very clumsy, since so much pushing and popping is going on, I have to make a deep copy of the data structure before running an analysis on it. So, I don't know if I made my question very clear -- but the main points are: What kind of data structures should be considered when analyzing sequential data points to conform to a pattern that does NOT require random access? What kind of data structures should be considered when classifying extrema of a set of data points?

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  • TechEd Europe early bird saving &ndash; register by 5th July

    - by Eric Nelson
    Another event advert alert :-) But this one comes with a cautious warning. I spoke at TechEd Europe last year. I found TechEd to be a huge, extremely well run conference filled with great speakers and passionate attendees in a top notch venue and fascinating city. As an “IT Pro” I think it is the premiere conference for Microsoft technologies in Europe. However, IMHO and those of others I trust, I didn’t think it hit the mark for developers in 2009. There was a fairly obvious reason – the PDC was scheduled to take place only a couple of weeks later which meant the “powder was being kept dry” and (IMHO) some of the best speakers on developer technologies were elsewhere. But I’m reasonably certain that this won’t be repeated this year (Err… Have I missed an announcement about “no pdc in 2010”?) Enjoy: Register for Tech·Ed Europe by 5 July and Save €500 Tech·Ed Europe returns to Berlin this November 8 – 12, for a full week of deep technical education, hands-on-learning and opportunities to connect with Microsoft and Community experts one-on-one.  Register by 5 July and receive your conference pass for only €1,395 – a €500 savings. Arrive Early and Get a Jumpstart on Technical Sessions Choose from 8 pre-conference seminars led by Microsoft and industry experts, and selected to give you a jumpstart on technical learning.  Additional fees apply.  Conference attendees receive a €100 discount.   Join the Tech·Ed Europe Email List for Event Updates Get the latest event news before the event, and find out more about what’s happening onsite.  Join the Tech·Ed Europe email list today!

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  • What are the consequences of immutable classes with references to mutable classes?

    - by glenviewjeff
    I've recently begun adopting the best practice of designing my classes to be immutable per Effective Java [Bloch2008]. I have a series of interrelated questions about degrees of mutability and their consequences. I have run into situations where a (Java) class I implemented is only "internally immutable" because it uses references to other mutable classes. In this case, the class under development appears from the external environment to have state. Do any of the benefits (see below) of immutable classes hold true even by only "internally immutable" classes? Is there an accepted term for the aforementioned "internal mutability"? Wikipedia's immutable object page uses the unsourced term "deep immutability" to describe an object whose references are also immutable. Is the distinction between mutability and side-effect-ness/state important? Josh Bloch lists the following benefits of immutable classes: are simple to construct, test, and use are automatically thread-safe and have no synchronization issues do not need a copy constructor do not need an implementation of clone allow hashCode to use lazy initialization, and to cache its return value do not need to be copied defensively when used as a field make good Map keys and Set elements (these objects must not change state while in the collection) have their class invariant established once upon construction, and it never needs to be checked again always have "failure atomicity" (a term used by Joshua Bloch) : if an immutable object throws an exception, it's never left in an undesirable or indeterminate state

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  • Advice for Setting up an On-Call Team

    - by Ciaran Archer
    I'm leading a largish development team (~35 developers). We are doing primarily Web Development work on a number of sites. Historically the knowledge on the teams has been pretty siloed. If you worked on Site A you will know how to troubleshoot it, but you would not be a lot of help on Site B. We also have a few cross-cutting concerns, i.e. common components used between sites which require specialized knowledge to troubleshoot. With all this in mind, I'm trying to understand the best way to setup an on-call team. This would be a team of programmers who would be available to deal with out-of-hours emergency issues occasionally (say one call every 2 weeks). They may be required to deploy emergency fixes. Part of me is saying we can't have a big on-call team with shallow knowledge, instead we need a smaller team with deep knowledge who can expect to be on-call more often and remunerated as such. Does anyone have any suggestions based on experience on how to setup this team? Thanks in advance.

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  • How to create water like in new super mario bros?

    - by user1103457
    I assume the water in New super mario bros works the same as in the first part of this tutorial: http://gamedev.tutsplus.com/tutorials/implementation/make-a-splash-with-2d-water-effects/ But in new super mario bros the water also has constant waves on the surface, and the splashes look very different. What's also a difference is that in the tutorial, if you create a splash, it first creates a deep "hole" in the water at the origin of the splash. In new super mario bros this hole is absent or much smaller. When I refer to the splashes in new super mario bros I am referring to the splashes that the player creates when jumping in and out of the water. For reference you could use this video: http://www.ign.com/videos/2012/11/17/new-super-mario-bros-u-3-star-coin-walkthrough-sparkling-waters-1-waterspout-beach just after 00:50, when the camera isn't moving you can get a good look at the water and the constant waves. there are also some good examples of the splashes during that time. How do they create the constant waves and the splashes? I am programming in XNA. (I have tried this myself but couldn't really get it all to work well together) (and as bonus questions: how do they create the light spots just under the surface of the waves, and how do they texture the deeper parts of the water? This is the first time I try to create water like this.)

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  • WebCenter Customer Advisory Board meetings kick off Oracle Open World 2012!

    - by Lance711
    Welcome to OpenWorld! OpenWorld 2012 got underway today with a series of meetings with the members of the WebCenter Customer Advisory Board. Led by the WebCenter Product Management team, these meetings are a great way for the product team and customers to directly interact and discuss real-life business challenges, product details and to discuss upcoming features and functionality. This year, board members participated in discussions around live demos around product enhancements that will be featured throughout the coming week. Highlights included a variety of new mobile and social solutions, a great new user interface for WebCenter Content plus new Portal and Sites functionality that makes the experience for the everyday user a lot more pleasant. The day kicked off with Roel Stalman, VP of Product Management, giving a detailed overview of what’s new in WebCenter. Given all the improvements to discuss, this session went over 2 hours! Roel showcased the brand new UI for Content, Portal and Sites. He also gave live demos of the new mobile apps for WebCenter Content, Portal and the Oracle Social Network.  The attendees then broke into sub-groups in order to deep-dive with Product Management for the Portal, Sites, and Content product areas on specific functionality and application integrations. If you are here in San Francisco this week for OpenWorld, I definitely recommend stopping by the WebCenter area in the Moscone West Exhibition Hall to see some of this new functionality for yourself. And be sure to check out the WebCenter sessions throughout the week as those give us a chance to discuss direction and strategy, answer your questions and get your feedback and ideas. For those of you could not make it to OpenWorld this year, we miss you! You can stay in touch with what is happening via this blog and by following #oow and #webcenter on Twitter. Additionally, we will be rolling out details on upcoming products and release info over the coming months via this blog and web seminars. Stay tuned!

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  • Craftsmanship Tour Day 1: Didit Long Island

    - by Liam McLennan
    On Monday I was at Didit for my first ever craftsmanship visit. Didit seem to occupy a good part of a non-descript building in Rockville Centre Long Island. Since I had arrived early from Seattle I had some time to kill, so I stopped at the Rockville Diner on the corner of N Park Ave and Sunrise Hwy. I thoroughly enjoyed the pancakes and the friendly service. After walking to the Didit office I met Rik Dryfoos, the Didit Engineering Manager who organised my visit, and got the introduction to Didit and the work they are doing. I spent the morning in the room shared by the Didit developers, who are working on some fascinating deep engineering problems. After lunch at a local Thai place I setup a webcam to record an interview with Rik and Matt Roman (Didit VP of Engineering). I had a lot of trouble with the webcam, including losing several minutes of conversation, but in the end I was very happy the result. Here are the full interviews with Rik and Matt: Interview with Rik Dryfoos Interview with Matt Roman We had a great chat, much of which is captured in the recording. It was such great conversation that I almost missed my train to Manhattan. I’m sure Didit will continue to do well with such a dedicated and enthusiastic team. I sincerely thank them for hosting me for the day. If you are looking for a true agile environment and the opportunity to work with a high quality team then you should talk to Didit.

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  • Which algorithm used in Advance Wars type turn based games

    - by Jan de Lange
    Has anyone tried to develop, or know of an algorithm such as used in a typical turn based game like Advance Wars, where the number of objects and the number of moves per object may be too large to search through up to a reasonable depth like one would do in a game with a smaller search base like chess? There is some path-finding needed to to engage into combat, harvest, or move to an object, so that in the next move such actions are possible. With this you can build a search tree for each item, resulting in a large tree for all items. With a cost function one can determine the best moves. Then the board flips over to the player role (min/max) and the computer searches the best player move, and flips back etc. upto a number of cycles deep. Finally it has found the best move and now it's the players turn. But he may be asleep by now... So how is this done in practice? I have found several good sources on A*, DFS, BFS, evaluation / cost functions etc. But as of yet I do not see how I can put it all together.

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  • Declarative View Objects (VOs) for better ADF performance

    - by Shay Shmeltzer
    Just got back from ODTUG's kscope13 conference which had a lot of good deep ADF content. In one of my session I ran out of time to do one of my demos, so I wanted to share it here instead. This is a demo of how Declarative View Objects can increase your application's performance. For those who are not familiar with declarative VOs, those are VOs that don't actually specify a hard coded query. Instead ADF creates their query at runtime, and it does it based on the data that is requested in your UI layer. This can be a huge saver of both DB resources and network resources. More in the documentation. Here is a quick example that shows you how using such a VO can automatically switch to a simpler SQL instead of a complex join when needed. (note while I demo with 11.1.2.* the feature is there in 11.1.1.* versions also). The demo also shows you how you can monitor the SQL that ADF BC issues to the database using the WebLogic logging feature in JDeveloper. As a side note, I would have loved to see more ADF developers attending Kscope. This demo was part of the "ADF intro" track at Kscope, In the advanced ADF track you would have been treated to a full tuning session about ADF with lots of other tips. Consider attending Kscope next year - it is going to be in Seattle this time.

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