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• Specialized &amp; Recognized by Oracle: Award season - make your submission for the OPN Specializati

  - by Jürgen Kress

    OPN Specialization Award Submit your nomination 2010 As an Oracle Partner in the process to become SOA & Application Grid Specialized and working on SOA and Application Grid opportunities please make sure that you submit your OPN Specialization Award Submit your nomination. Prices include free Oracle Open World tickets, marketing budgets for joint campaigns and joint press release. "These awards will recognize the high-level of innovation, excellence and commitment our partners bring to the table when they become Specialized with Oracle. We’re looking for partners with a proven track record in delivering winning, proven solutions that solve customers' most critical business challenges. Our Award winners will be partners that have demonstrated tangible success, growth in their Oracle business and outstanding Oracle solutions." Stein Surlien, SVP Oracle Alliances and Channels EMEA Nominations are open to partners based in EMEA from 1st March to 2nd July 2010. Be recognized! Submit your nominations today     Oracle Fusion Middleware Innovation Awards 2010 As an Oracle Customer and Partner make sure that you submit your Oracle Fusion Middleware Innovation Awards nomination Does your company use Oracle Fusion Middleware innovatively? Nominate your organization today for a chance to be recognized for your cutting-edge solution using any of the following Oracle Fusion Middleware products: Oracle Application Grid products Oracle SOA Suite Data Integration & Availability Oracle Identity Management Suite Oracle Fusion Middleware with Oracle Applications Enterprise 2.0 Prices include: FREE pass to Oracle OpenWorld 2010 in San Francisco for select winners in each category. Honored by Oracle executives at awards ceremony held during Oracle OpenWorld 2010 in San Francisco. Oracle Middleware Innovation Award Winner Plaque 1-3 meetings with Oracle Executives during Oracle OpenWorld 2010 Feature article placement in Oracle Magazine and placement in Oracle Press Release Customer snapshot and video testimonial opportunity, to be hosted on oracle.com Podcast interview opportunity with Senior Oracle Executive Submit your nomination to [email protected] on or before August 6th 2010 to win Oracle Fusion Middleware Innovation Awards 2010.

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• A new mission statement for my school's algorithms class

  - by Eric Fode

  The teacher at Eastern Washington University that is now teaching the algorithms course is new to eastern and as a result the course has changed drastically mostly in the right direction. That being said I feel that the class could use a more specific, and industry oriented (since that is where most students will go, though suggestions for an academia oriented class are also welcome) direction, having only worked in industry for 2 years I would like the community's (a wider and much more collectively experienced and in the end plausibly more credible) opinion on the quality of this as a statement for the purpose an algorithms class, and if I am completely off target your suggestion for the purpose of a required Jr. level Algorithms class that is standalone (so no other classes focusing specifically on algorithms are required). The statement is as follows: The purpose of the algorithms class is to do three things: Primarily, to teach how to learn, do basic analysis, and implement a given algorithm found outside of the class. Secondly, to teach the student how to model a problem in their mind so that they can find a an existing algorithm or have a direction to start the development of a new algorithm. Third, to overview a variety of algorithms that exist and to deeply understand and analyze one algorithm in each of the basic algorithmic design strategies: Divide and Conquer, Reduce and Conquer, Transform and Conquer, Greedy, Brute Force, Iterative Improvement and Dynamic Programming. The Question in short is: do you agree with this statement of the purpose of an algorithms course, so that it would be useful in the real world, if not what would you suggest?

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• Very simple OOP question

  - by Mosty Mostacho

  I was creating and discussing a class diagram with a partner of mine. To simplify things, I've modify the real domain we're working on and made up the following diagram: Basically, a company works on constructions that are quite different one from each other but are still constructions. Note I've added one field for each class but there should be many more. Now, I thought this was the way to go but my partner told me that if in the future new construction classes appear we would have to modify the Company class, which is correct. So the new proposed class diagram would be this: Now I've been wondering: Should the fact that in no place of the application will there be mixed lists of planes and bridges affect the design in any way? When we have to list only planes for a company, how are we supposed to distinguish them from the other elements in the list without checking for their class names? Related to the previous question, is it correct to assume that this type of diagram should be high-level and this is something it shouldn't matter at this stage but rather be thought and decided at implementation time? Any comment will be appreciated.

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• Grading an algorithm: Readability vs. Compactness

  - by amiregelz

  Consider the following question in a test \ interview: Implement the strcpy() function in C: void strcpy(char *destination, char *source); The strcpy function copies the C string pointed by source into the array pointed by destination, including the terminating null character. Assume that the size of the array pointed by destination is long enough to contain the same C string as source, and does not overlap in memory with source. Say you were the tester, how would you grade the following answers to this question? 1) void strcpy(char *destination, char *source) { while (*source != '\0') { *destination = *source; source++; destionation++; } *destionation = *source; } 2) void strcpy(char *destination, char *source) { while (*(destination++) = *(source++)) ; } The first implementation is straightforward - it is readable and programmer-friendly. The second implementation is shorter (one line of code) but less programmer-friendly; it's not so easy to understand the way this code is working, and if you're not familiar with the priorities in this code then it's a problem. I'm wondering if the first answer would show more complexity and more advanced thinking, in the tester's eyes, even though both algorithms behave the same, and although code readability is considered to be more important than code compactness. It seems to me that since making an algorithm this compact is more difficult to implement, it will show a higher level of thinking as an answer in a test. However, it is also possible that a tester would consider the first answer not good because it's not readable. I would also like to mention that this is not specific to this example, but general for code readability vs. compactness when implementing an algorithm, specifically in tests \ interviews.

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• Implmenting RLE into a tilemap or how to create a large 3D array?

  - by Smallbro

  Currently I've been using a 3D array for my tiles in a 2D world but the 3D side comes in when moving down into caves and whatnot. Now this is not memory efficient and I switched over to a 2D array and can now have much larger maps. The only issue I'm having now is that it seems that my tiles cannot occupy the same space as a tile on the same z level. My current structure means that each block has its own z variable. This is what it used to look like: map.blockData[x][y][z] = new Block(); however now it works like this map.blockData[x][y] = new Block(z); I'm not sure why but if I decide to use the same space on say the floor below it wont allow me to. Does anyone have any ideas on how I can add a z-axis to my 2D array? I'm using java but I reckon the concept carries across different languages. Edit: As Will posted, RLE sounds like the best method for achieving a fast 3D array. However I'm struggling to understand how I would even start to implement it? Would I create a 4D array the 4th being something which controls how many to skip? Or would the x-axis simply change altogether and have large gaps in between - for example [5][y][z] would skip 5 tiles? Is there something really obvious here which I am missing? The number of z levels I'm trying to have is around 66, it would be preferably that I can have up to or more than 1000 in x and y.

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• Small, fast shopping cart setup

  - by R..

  I'm looking for an open source shopping cart solution that's simple and easy to setup. The requirements are: Quick setup for someone familiar with *nix webservers. Checkout via PayPal (other payment methods not needed). Customers should not have to create an account to make a purchase. At least a minimal level of inventory control. Ability to print/export a list of orders in compact form. Any recommendations for something I should try? Ability to get it up and working quickly is really my priority right now; if it's not ideal, it can be replaced (or, as I'm looking for open source, I can adapt it to fit the requirements better) at a later time. Edit: Really what I'm looking for is simplicity. This will be for a small local business, and the orders will consist of 1-10 items that are being delivered by a driver who needs a simple list of what each customer received when making delivery. Looking like a giant online computer/electronics/etc. store is definitely not a desirable quality. The simpler the interface presented to customers (who are used to purchasing through dumb web forms and paying COD), the better.

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• BI&EPM in Focus - November 2011

  - by Mike.Hallett(at)Oracle-BI&EPM

  Enterprise Performance Management A Thing of Beauty, by Alison WeissAvon’s enterprise performance management system delivers accurate information and critical insight to managers at every level of the organization Oracle Crystal Ball Helps Managers Guard Against Volatility, by Alison Weiss The Insight Game, by Aaron LazenbyEnterprise performance management can deliver insights crucial to navigating the volatility of the global economy—and that’s no game of checkers. KPI vs. the Bottom Line, by Edward RoskeFor managers, is tracking the key metrics for their departments enough to ensure success for the entire business? The CEO for Oracle partner interRel shares his opinion. Deep Integration, by Aaron LazenbyThe synthesis of Oracle Hyperion applications and core Oracle technologies can deliver deep benefits to analytics-driven businesses. Oracle Crystal Ball. Oracle's #1 Solution for Risk Management Follow EPM Documentation at Hyperion EPM Info for news about EPM documentation releases and updates (twitter | facebook | Linkedin) Whitepaper: Integrating XBRL Into Your Financial Reporting Process Oracle Hyperion Disclosure Management Customer Story: StealthGas Inc. Saves 12 Accountant Days Yearly, Validates XBRL-Compliant Financial Filing Data in One Day Sherwin-Williams Argentina I.C.S.A. Accelerates Budget Preparation Process by 75% BBDO Germany GmbH Consolidates Financial and Planning Processes for More Than 50 Agencies StealthGas Inc. Saves 12 Accountant Days Yearly, Validates XBRL-Compliant Financial Filing Data in One Day Business Intelligence Webcast Replay: Oracle Data Mining & BI EE - Predictive Analytics (Part 2) Innovation Award Winners - BI/EPM: HealthSouth, State of MD, Clorox Company, Telenor and Dunkin Brands Leeds Teaching Hospitals National Health Service Trust Builds Budget Reports Six Times Faster, Achieves 100% ROI in 12 Months with Oracle Business Intelligence Home Credit Group Consolidates Reporting and Saves Time across All Business Units w/ Oracle Essbase & OBIEE Autoglass Improves Business Visibility and Services to Customers and Partners with Oracle Business Intelligence Events Download Oracle OpenWorld Oct 2011 Presentations select Middleware - BI or Applications - Hyperion Oracle Business Analytics Summits:learn about the latest trends, best practices, and innovations in business intelligence, analytics applications, and data warehousing Webcast Nov 15 9am PST: Running the Last Mile, Beyond Financial Consolidations - Streamlining the Close and Addressing the SEC's XBRL Mandate Webcast Dec 13 1pm PST: Defining Your Mobile BI Strategy (BICG) New Training Available: Oracle BI Publisher 11g R1: Fundamentals Webcast Replay: How to Expand the Usage of Analytics in your Organization while Driving Down IT Spend Webcast Replay: Real-Time Decisions (RTD) Updated Use Cases for Ecommerce Personalization in Financial Services & Retail

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• Advice: How to convince my newly annointed team lead against writing the code base from scratch

  - by shan23

  I work in a pretty reknowned MNC, and the module that I work in has been assigned to a new "lead". The code base is pretty huge (~130K or more, with inter dependencies on other modules) , but stable - some parts have grown ugly over the years, but its provably in working state. (Our products are running for years on them, even new ones). The problem is, our lead wants to rewrite the code from scratch, to encompass "finer granularity and a proactive design". I know in my guts thats not a very good idea, but how do I convince him/the rest of the team(who are pretty much more senior than me in terms of years of exp), without sounding too pedantic myself (Thou shalt not rewrite , as Joel et al have clear articles prohibiting it)? I have a good working relation with the person concerned, and don't want to ruin it, but neither do I want to be party to a decision which would surely plague us for years to come !! Any suggestions for a milder,yet effective approach ? Even accounts of how you have tackled such a situation to your liking would help me a lot! EDIT: The code base I'm talking about is not a product/GUI, but at kernel level with all the critical functionalities for our product. I hope now you know why i sound so apprehensive !!

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• Impossible to select folders and files with mouse (Ubuntu 12.04)

  - by François

  First-time post for me here (after being a regular reader for two years though) so thank you all for the quality of replies and help provided. My problem is very simple apparently but a tricky one. I just installed the Ubuntu 12.04(1) along with the Gnome3-shell environment on my new pc desktop Acer Aspire X3995 (see config below). Everything work (more or less) so far (I still have problems of sound and disabled 2-fingers gestures with my screen -- which I will have to deal with xconfig settings I think -- though), but the main problem is that I cannot select files/folders with my USB mouse. When I try to double click on them, nothing happen (sometimes one folder or file is selected but then unselected again). Note that the navigation works perfectly from the USB keyboard and from the touch-screen (I am using a 23" wide touch-screen Acer Monitor T231Hbmid). Also, the mouse works perfectly with other menu navigation, with the only difference that the text of certain menus is selected as if I was holding the left click on them. So I assume the problem is only related to the mouse. Needless to say that the usual basic hardware checks have been performed (unplugging, powered-off, etc.). My level is simply "advanced user", meaning that if you provide me with intelligible input I should find my way, but please don't expect too much technical/specific knowledge... :) Please let me know if you need more information on this bug. Now, fingers crossed... and thanks in advance! Ciao, François Config of Acer Aspire X3995: Ubuntu 12.04 / Gnome3-shell environment / Intel Core i5 3450 / nVidia GeForce 605, 1Gb. Screen: Acer Monitor TFT 23" wide T231Hbmid

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• Library Organization in .NET

  - by Greg Ros

  I've written a .NET bitwise operations library as part of my projects (stuff ranging from get MSB set to some more complicated bitwise transformations) and I mean to release it as free software. I'm a bit confused about a design aspect of the library, though. Many of the methods/transformations in the library come with different endianness. A simple example is a getBitAt method that regards index 0 as the least significant bit, or the most significant bit, depending on the version used. In practice, I've found that using separate functions for different endianness results in much more comprehensible and reusable code than assuming all operations are little-endian or something. I'm really stumped regarding how best to package the library. Should I have methods that have LE and BE versions take an enum parameter in their signature, e.g. Endianness.Little, Endianness.Big? Should I have different static classes with identically named methods? such as MSB.GetBit and LSB.GetBit On a much wider note, is there a standard I could use in cases like this? Some guide? Is my design issue trivial? I have a perfectionist bent, and I sometimes get stuck on tricky design issues like this... Note: I've sort of realized I'm using endianness somewhat colloquially to refer to the order/place value of digital component parts (be they bits, bytes, or words) in a larger whole, in any setting. I'm not talking about machine-level endianness or serial transmission endianness. Just about place-value semantics in general. So there isn't a context of targeting different machines/transmission techniques or something.

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• Ubuntu openGL issues

  - by Dank101

  my OpenGL doesn't work at all i get Xlib: extension "GLX" missing on display ":0". lspci output 00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09) (prog-if 00 [VGA controller]) 01:00.0 VGA compatible controller [0300]: NVIDIA Corporation Device [10de:1246] (rev a1) (prog-if 00 [VGA controller]) dmesg | grep -i nvid [ 9.469068] nvidia: module license 'NVIDIA' taints kernel. [ 9.538786] nvidia 0000:01:00.0: power state changed by ACPI to D0 [ 9.538792] nvidia 0000:01:00.0: power state changed by ACPI to D0 [ 9.538796] nvidia 0000:01:00.0: enabling device (0006 -> 0007) [ 9.538803] nvidia 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 9.538809] nvidia 0000:01:00.0: setting latency timer to 64 [ 9.538942] NVRM: loading NVIDIA UNIX x86_64 Kernel Module 304.48 Sun Sep 9 [10300.955799] nvidia 0000:01:00.0: restoring config space at offset 0xf (was 0x100, writing 0x10b) [10300.955803] nvidia 0000:01:00.0: restoring config space at offset 0xc (was 0x0, writing 0xfff80000) [10300.955807] nvidia 0000:01:00.0: restoring config space at offset 0x9 (was 0x1, writing 0x4001) [10300.955811] nvidia 0000:01:00.0: restoring config space at offset 0x7 (was 0xc, writing 0xd000000c) [10300.955814] nvidia 0000:01:00.0: restoring config space at offset 0x5 (was 0xc, writing 0xc000000c) [10300.955817] nvidia 0000:01:00.0: restoring config space at offset 0x4 (was 0x0, writing 0xf0000000) [10300.955820] nvidia 0000:01:00.0: restoring config space at offset 0x3 (was 0x800000, writing 0x10) [10300.955823] nvidia 0000:01:00.0: restoring config space at offset 0x1 (was 0x100006, writing 0x100007) my computer is a dell XPS l702x

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• Can anyone recommend an AI sandbox?

  - by user19433

  I'm passionate person, who has been around AI from a long time [1] but never going in deep enough. Now it's time! I've been really looking for some way to concentrate on AI coding but couldn't succeeded to find an AI environment I can focus on. I just want to use an AI sandbox environment which would let me have tools like: visibility information character controller able to easily define a level, with obstacles of course physics collider management triggers management don't need to be a shiny, eye candy graphical render : this is about pathfinding, tactical reasoning, etc.. I have tried : Unreal Dev Kit : while the new release announce is about C++ coding, this is about external tools and will be released in 2013 Cry Engine : really interesting as AI is presents here but coding with it appears to be an hell: did I got it wrong ? Half Life source, C4, Torque, Dx Studio : either quite old, not very useful or costly these imply to dig in documentation (when provided) to code everything, graphics included. Unity 3D : the most promising platform. While you also need to create your own environment, there are lot of examples. The disadvantage is, in addition to spend time to have this env. working, is the languages choice : C#, Javascript or Boo. C# is not that hard, but this implies you'll allways have to convert papers (I love those from Lars Linden) books codes, or anything you can have in Aigamedev are most often in C++. This is extra work. I've look at "Simple Path", the very good Arong Greenberg work but no source provided and AngryAnt work. AI Sandbox : this seems to be exactly what as AI coder I want to use. I saw some preview but from 2009 we still don't know what it will be about precisely, will it be opensource or free (I strongly doubt), will I be able to buy it? will it really provide me tools I need to focus on AI ? That being said, what is the best environment to be able to focus on AI coding only, is it even possible?

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• MMORPG design for time-limited players

  - by Philipp

  I believe that there is a significant market of players who would enjoy the exploration and interaction aspects of MMORPGs, but simply don't have the time for the endless grinding marathons which are part of the average MMORPG. MMORPGs are all about interaction between players. But when different players have different amounts of time to invest into a game, those with less time to spend will soon lack behind their power-leveling friends and won't be able to interact with them anymore. One way to solve this would be to limit the progress a player can achieve per day, so that it simply doesn't make sense to play more than one or two hours a day. But even the busiest casual players sometimes like to spend a whole sunday afternoon playing a video game. Just stopping them after two hours would be really frustrating. It also creates a pressure to use the daily progress limit every day, because otherwise the player would feel like wasting something. This pressure would be detrimental for casual gamers. What else could be done to level the playing field between those players who play 40+ hours a week and those who can't play more than 10?

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• How do I classify using SVM Classifier in Matlab?

  - by Gomathi

  I'm on a project of liver tumor segmentation and classification. I used Region Growing and FCM for liver and tumor segmentation respectively. Then, I used Gray Level Co-occurence matrix for texture feature extraction. I have to use Support Vector Machine for Classification. But I don't know how to normalize the feature vectors. Can anyone tell how to program it in Matlab? To the GLCM program, I gave the tumor segmented image as input. Was I correct? If so, I think, then, my output will also be correct. I gave the parameters exactly as in the example provided in the documentation itself. The output I obtained was stats = autoc: [1.857855266614132e+000 1.857955341199538e+000] contr: [5.103143332457753e-002 5.030548650257343e-002] corrm: [9.512661919561399e-001 9.519459060378332e-001] corrp: [9.512661919561385e-001 9.519459060378338e-001] cprom: [7.885631654779597e+001 7.905268525471267e+001] cshad: [1.219440700252286e+001 1.220659371449108e+001] dissi: [2.037387269065756e-002 1.935418927908687e-002] energ: [8.987753042491253e-001 8.988459843719526e-001] entro: [2.759187341212805e-001 2.743152140681436e-001] homom: [9.930016927881388e-001 9.935307908219834e-001] homop: [9.925660617240367e-001 9.930960070222014e-001] maxpr: [9.474275457490587e-001 9.474466930429607e-001] sosvh: [1.847174384255155e+000 1.846913030238459e+000] savgh: [2.332207337361002e+000 2.332108469591401e+000] svarh: [6.311174784234007e+000 6.314794324825067e+000] senth: [2.663144677055123e-001 2.653725436772341e-001] dvarh: [5.103143332457753e-002 5.030548650257344e-002] denth: [7.573115918713391e-002 7.073380266499811e-002] inf1h: [-8.199645492654247e-001 -8.265514568489666e-001] inf2h: [5.643539051044213e-001 5.661543271625117e-001] indnc: [9.980238521073823e-001 9.981394883569174e-001] idmnc: [9.993275086521848e-001 9.993404634013308e-001] The thing is, I run the program for three images. But all three gave me the same output. When I used graycoprops() stat = Contrast: 4.721877658740964e+005 Correlation: -3.282870417955449e-003 Energy: 8.647689474127760e-006 Homogeneity: 8.194621855726478e-003 stat = Contrast: 2.817160447307697e+004 Correlation: 2.113032196952781e-005 Energy: 4.124904827799189e-004 Homogeneity: 2.513567163994905e-002 stat = Contrast: 7.086638436309059e+004 Correlation: 2.459637878221028e-002 Energy: 4.640677159445994e-004 Homogeneity: 1.158305728309460e-002 The images are:

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• Simple issue tracker for 1-2 developers

  - by devoured elysium

  (I'm not sure whether this pertains to the realm of programmers@se or so@se) I'm currently working mostly alone on a project (in Java). I'm mostly alone as I have an advisor that gives me high level instructions on what to do, and will seldom make any code contribution. She will code in a couple of acceptance tests from time to time, though. I've never used an Issue Tracker before, and was thinking about starting to use one now, as I'd like to have a place where I can log possible bugs I find and keep track of them in a centralized manner. Would it be possible to integrate the issue tracker with Eclipse, better yet. So here are the constraints: It's NOT a open-source project. Our code is not to be shared with anyone! we are and will be using Subversion; we have our own Subversion server and we will keep using this same Subversion server; it must be free; it must allow at least 2 users. What is your advice on what to pick? I'm looking for the simplest solution available!

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• Is there an alternative to HTML Web Sockets, now that Firefox 4 has disabled them?

  - by Pino

  I've been checking out some of the latest multiplayer engines in HTML all supporting multi-user games (Very nice) - I believe all these engines use Web Sockets for communication. That’s why we’ve decided to disable support for WebSocket in Firefox 4, starting with beta 8 due to a protocol-level security issue. Beta 7 of Firefox has support for the -76 version of the protocol, the same version that’s included with Chrome and Safari. Beta 8 of Firefox 4 will remove that support. Anne van Kesteren of Opera also announced that Opera are dropping Websocket support. We are confident that other browser developers will follow. Source: Websockets Disabled in FireFox 4 I've just come accross the above, so no sockets in Firefox 4 or Opera.... thats big. Is anyone aware of an alternate or is it Chrome or do we need to just sit and wait for the next release of the major browsers. More info : Rocket Engine appears to work with all browsers including IE8 (http://rocketpack.fi/engine/) what will it be using as a method of communication?

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• Cross platform development query

  - by Ian

  I'm a Microsoft developer mainly, but there are a couple of small-ish projects I'd like to fiddle with which would benefit from being cross platform. The platforms I want to target are: Windows, Linux, Mac, Android and preferably iPhone, web (running in a browser). I need 3D (Around the level of support seen in something like Minecraft (I'm not writing Minecraft)), some networking. I'm pretty certain Java would work on all except iPhone. Looking at the "related questions" above it's offered up QT (no browser or phone afaik) and also HTML/CSS/Javascript (3D? package for desktop?) The other alternative is to have seperate versions for seperate platforms, developed with some common code where possible. That option isn't something I know anything about. Does anyone have experience of this sort of conundrum? I figured here was better than SO, because I imagine there are compromises which extend beyond technical choice. Finally, this is not a commercial operation, so some of the very expensive cross platform tools are out of the question unless they offer some sort of community edition. Thanks for your time.

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• What is the precise definition of programming paradigm?

  - by Kazark

  Wikipedia defines programming paradigm thus: a fundamental style of computer programming which is echoed in the descriptive text of the paradigms tag on this site. I find this a disappointing definition. Anyone who knows the words programming and paradigm could do about that well without knowing anything else about it. There are many styles of computer programming at many level of abstraction; within any given programming paradigm, multiple styles are possible. For example, Bob Martin says in Clean Code (13), Consider this book a description of the Object Mentor School of Clean Code. The techniques and teachings within are the way that we practice our art. We are willing to claim that if you follow these teachings, you will enjoy the benefits that we have enjoyed, and you will learn to write code that is clean and professional. But don't make the mistake of thinking that we are somehow "right" in any absolute sense. Thus Bob Martin is not claiming to have the correct style of Object-Oriented programming, even though he, if anyone, might have some claim to doing so. But even within his school of programming, we might have different styles of formatting the code (K&R, etc). There are many styles of programming at many levels. So how can we define programming paradigm rigorously, to distinguish it from other categories of programming styles? Fundamental is somewhat helpful, but not specific. How can we define the phrase in a way that will communicate more than the separate meanings of each of the two words—in other words, how can we define it in a way that will provide additional meaning for someone who speaks English but isn't familiar with a variety of paradigms?

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• Running multiple box2D world objects on a server

  - by CharbelAbdo

  I'm creating a multiplayer game using LibGdx (with Box2d) and Kryonet. Since this is the first time I work on multiplayer games, I read a bit about server - client implementations, and it turns out that the server should handle important tasks like collision detection, hits, characters dying etc... Based on some articles (like the excellent Gabriel Gambetta Fast paced multiplayer series), I also know that the client should work in parallel to avoid the lag while the server responds to commands. Physics wise, each game will have 2 players, and any projectiles fired. What I'm thinking of doing is the following: Create a physics world on the client When the game is signaled to start, I create the same physics world on the server (without any rendering obviously). Whenever the player issues a command (move or fire), I send the command to the server and immediately start processing it on the client. When the server receives the command, it applies it on the server's world (set velocity etc...) Each 100ms, the server sends the new state to the client which corrects what was calculated locally. Any critical action (hit, death, level up) is calculated only on the server and sent to the client. Essentially, I would have a Box2d World object running on the server for each game in progress, in sync with the worlds running on the clients. The alternative would be to do my own calculations on the server instead of relying on Box2D to do them for me, but I'm trying to avoid that. My question is: Is it wise to have, for example, 1000 instances of the World object running and executing steps on the server? Tomcat used around 750 MBytes of memory when trying it without any object added to the world. Anybody tried that before? If not, is there any alternative? Google did not help me, are there any guidelines to use when you want to have physics on both the client and the server? Thanks for any help.

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• Bright Minds in Singapore: Oracle Graduate Hiring

  - by user769227

   Last week I was in Singapore and had the opportunity to take part in our graduate interviewing that we are currently undertaking as part of our ASEAN hiring. I always feel fortunate to get the chance to meet and talk with students in the APAC region and taking time to meet some of the students we interviewed in Singapore last week is no exception. The excitement and enthusiasm of many of the students that I spoke to last week really stands out but what really brought some of them to the forefront for me was their creative ways of thinking and the level of professionalism that I saw in the students. Some of the presentation and communication skills that I saw displayed would rival experienced IT Consultants in the industry.  We still have more interviews to follow up from last week, but I am confident that of the students we had the chance to meet last week some of them will go on to have bright and successful careers here at Oracle.  To all the students that came in and spent the day with us, I want to thank you for giving us your time and for sharing your thoughts and ideas with us. From a business perspective I think you all will go on and do great things and from a personal stand point I enjoyed many of the conversations I had and feel lucky to meet with you. Best of luck with the remainder of your interviews and I hope to see some of you in the halls on my next visit to Singapore.

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• MOSC Bits - Personalized Profile

  - by Irina Donaldson - Moderator -Oracle

  It is a good idea to have a unique profile in MOSC. Your activities there are better recognized and might even become a well known brand! This leads to recognition and trust. My Oracle Support Communities (MOSC)  is a well established platform where experiences are shared. Reputation and trust are the basis for the quality of all communication there. A personalized  profile can help to build up a good reputation. Besides the experience counter, a good name, details about your location and business experience are valuable details. Although a little bit hidden, the profile's avatar can be customized, too. The profile's avatar is an eye catcher and can act as an unique visual representation for  you.  How to add / modify MOSC profile avatar (picture, icon)  ?    Don't look in Edit Profile section. After login, click on  your profile's name on top right.   This lists all public information as part of the Bio section. Select the Activity tab. The Change Avatar link is on same level at far right. A list of predefined symbolic pictures is populated. Choose from the list of existing pictures or try Add Another to upload an image file from your local computer (JPG, PNG, GIF, or BMP only, maximum file size of 2.0 MB). Note: New added images can be used only after running through a review process. Usually after one business day they can be selected for your personal avatar.

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• Restrictive routing best practices for Google App Engine with python?

  - by Aleksandr Makov

  Say I have a simple structure: app = webapp2.WSGIApplication([ (r'/', 'pages.login'), (r'/profile', 'pages.profile'), (r'/dashboard', 'pages.dash'), ], debug=True) Basically all pages require authentication except for the login. If visitor tries to reach a restrictive page and he isn't authorized (or lacks privileges) then he gets redirected to the login view. The question is about the routing design. Should I check the auth and ACL privs in each of the modules (pages.profile and pages.dash from example above), or just pass all requests through the single routing mechanism: app = webapp2.WSGIApplication([ (r'/', 'pages.login'), (r'/.+', 'router') ], debug=True) I'm still quite new to the GAE, but my app requires authentication as well as ACL. I'm aware that there's login directive on the server config level, but I don't know how it works and how I can tight it with my ACL logic and what's worse I cannot estimate time needed to get it running. Besides, it looks only to provide only 2 user groups: admin and user. In any case, that's the configuration I use: handlers: - url: /favicon.ico static_files: static/favicon.ico upload: static/favicon.ico - url: /static/* static_dir: static - url: .* script: main.app secure: always Or I miss something here and ACL can be set in the config file? Thanks.

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• StyleCop 4.7.34.0 has been released

  - by TATWORTH

  StyleCop 4.7.34.0 was released, today, 6/July at http://stylecop.codeplex.com/releases/view/79972Compatible with the Visual Studio 2012 RC (11.0.50522).Install order should be : VS2008VS2010VS2012 RCR#6.1.1 (for VS2010)R#7.0 (tested with daily build 7.0.83.281) (down load from http://confluence.jetbrains.net/display/ReSharper/ReSharper+7+EAP)StyleCop This version is now compatible with R# 5.1 (5.1.3000.12), R# 6.0 (6.0.2202.688), R# 6.1 (6.1.37.86), R# 6.1.1 (6.1.1000.82) and R# 7.0 (7.0.83.281).Here are the bug details for fixed in 4.7 and closed in 4.7 issues (over 100 issues fixed since 4.6)Here are the bug details for all issues since 4.3.3.0 that have been fixed and closed (over 450 fixes).Updated Release Notes are available hereOnline Rules documentation is available hereFixes for this release are:Update ReSharper 7.0 references to 7.0.83.281Fix for 7343. Inheritdoc was raising false positives for some partial classes. Added regression test data.Fix for 7351. Remove the correct blank lines for SA1512 on code cleanup.Fix for 7346. Insert documentation fully on cleanup and on bulb items.Ensure that the SuppressMessage bulbItem can calculate the correct element to insert at.Fix for 7352. Module level suppressmessages were not working.Spelling mistake.Add missing typenames to resource file.Spelling fixes.Remove obsolete files.

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• Server 2008R2 in Extra Small Windows Azure Instance?

  - by Shawn Eary

  Windows Azure hosting for an Extra Small (XS) Windows VM seems to come out to be about $10 a month right now. I think this XS instance gives you the equivalent of a 1 GHZ CPU with 768MB of RAM. I think the minimum requirements for Server 2008 is 1GHZ CPU with 512MB of RAM. Also, I think the minimum requirements for SQL Server Express is 1GHZ CPU with 256 MB of RAM and that the minimum requirements for Team Foundation Server Express 11 Beta is 2.2 GHZ CPU with 1 Gig of RAM (this 2.2 GHZ part could be a problem for my 1 GHZ XS VM...). Given the performance of the XS Azure instance, would I be able to install: a very basic MVC web site; a free instance of SQL Server Express; a free single user instance of Team Foundation Server Express 11 Beta and run the XS VM instance without serious crashing? I know there are other Shared WebHost providers that can provide these features for me, but those hosting providers have the following disadvantages: They sometimes cost a lot of money after all of the "addons" are in place They probably don't provide the level of security and employee integrity that Microsoft can provide They don't provide the total control that an Azure VM seems to provide

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• Mono is frequently used to say "Yes, .NET is cross-platform". How valid is that claim?

  - by Thorbjørn Ravn Andersen

  In What would you choose for your project between .NET and Java at this point in time ? I say that I would consider the "Will you always deploy to Windows?" the single most important decision to make up front in a new web project, and if the answer is "no", I would recommend Java instead of .NET. A very common counter-argument is that "If we ever want to run on Linux/OS X/Whatever, we'll just run Mono", which is a very compelling argument on the surface, but I don't agree for several reasons. OpenJDK and all the vendor supplied JVM's have passed the official Sun TCK ensuring things work correctly. I am not aware of Mono passing a Microsoft TCK. Mono trails the .NET releases. What .NET-level is currently fully supported? Does all GUI elements (WinForms?) work correctly in Mono? Businesses may not want to depend on Open Source frameworks as the official plan B. I am aware that with the new governance of Java by Oracle, the future is unsafe, but e.g. IBM provides JDK's for many platforms, including Linux. They are just not open sourced. So, under which circumstances is Mono a valid business strategy for .NET-applications?

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