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• What does your Lisp workflow look like?

  - by Duncan Bayne

  I'm learning Lisp at the moment, coming from a language progression that is Locomotive BASIC - Z80 Assembler - Pascal - C - Perl - C# - Ruby. My approach is to simultaneously: write a simple web-scraper using SBCL, QuickLisp, closure-html, and drakma watch the SICP lectures I think this is working well; I'm developing good 'Lisp goggles', in that I can now read Lisp reasonably easily. I'm also getting a feel for how the Lisp ecosystem works, e.g. Quicklisp for dependencies. What I'm really missing, though, is a sense of how a seasoned Lisper actually works. When I'm coding for .NET, I have Visual Studio set up with ReSharper and VisualSVN. I write tests, I implement, I refactor, I commit. Then when I'm done enough of that to complete a story, I write some AUATs. Then I kick off a Release build on TeamCity to push the new functionality out to the customer for testing & hopefully approval. If it's an app that needs an installer, I use either WiX or InnoSetup, obviously building the installer through the CI system. So, my question is: as an experienced Lisper, what does your workflow look like? Do you work mostly in the REPL, or in the editor? How do you do unit tests? Continuous integration? Packaging & deployment? When you sit down at your desk, steaming mug of coffee to one side and a framed photo of John McCarthy to the other, what is it that you do? Currently, I feel like I am getting to grips with Lisp coding, but not Lisp development ...

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• Migrating Forms to Java or ADF, the truth and no FUD

  - by Grant Ronald

  The question about migrating Forms to Java (or ADF or APEX) comes up time and time again.  I wanted to pull some core information together in a single blog post to address this question. The first question I always ask is "WHY" - Forms may still be a viable option for you so "if it ain't broke don't fix it".  Bottom line is whatever anyone tells you, its going to be a considerable effort and cost to migrate from Forms to something else so the business is going to want to know WHY you spend all those hard earned dollars switching from something that might have been serving you quite adequately. Second point, if you are going to switch, I would encourage you NOT to look at building a Forms clone.  So many times I see people trying to build an ADF application and EXACTLY mimic the Forms model - ADF is NOT a Forms clone.  You should be building to the sweet spot of your target technology, not your 20 year old client/server technology.  This is also the chance for the business to embrace change, so maybe look at new processes, channels and technology options that weren't available when you first developed your Forms applications. To help you understand what is involved, I've put together a number of resources. Thinking about migration of Forms to Java, ADF or APEX, read this to prepare yourself Oracle Forms to ADF: When, Why and How - this gives you an overview of our vision, directly from Oracle Product Management Redeveloping a Forms Application with Oracle JDeveloper and Oracle ADF.  This is a conference session from myself and Lynn Munsinger on how ADF can be used in a Forms migration/rewrite As someone who manages both Forms and ADF Product Management teams, I've a foot in either camp and am happy to see you use either tool.  However, I want you to be able to make an informed decision.  My hope is that there information sources will help you do that.

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• Tomcat 7 on Ubuntu 12.04 with JRE 7 not starting

  - by Andreas Krueger

  I am running a virtual server in the web on Ubuntu 12.04 LTS / 32 Bit. After a clean install of JRE 7 and Tomcat 7, following the instructions on http://www.sysadminslife.com, I don't get Tomcat 7 up and running. > java -version java version "1.7.0_09" Java(TM) SE Runtime Environment (build 1.7.0_09-b05) Java HotSpot(TM) Client VM (build 23.5-b02, mixed mode) > /etc/init.d/tomcat start Starting Tomcat Using CATALINA_BASE: /usr/local/tomcat Using CATALINA_HOME: /usr/local/tomcat Using CATALINA_TMPDIR: /usr/local/tomcat/temp Using JRE_HOME: /usr/lib/jvm/java-7-oracle Using CLASSPATH: /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar > telnet localhost 8080 Trying ::1... Trying 127.0.0.1... telnet: Unable to connect to remote host: Connection refused netstat sometimes shows a Java process, most of the times not. If it does, nothing works either. Does anyone have a solution or encountered similar situations? Here are the contents of catalina.out: 16.11.2012 18:36:39 org.apache.catalina.core.AprLifecycleListener init INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /usr/lib/jvm/java-6-oracle/lib/i386/client:/usr/lib/jvm/java-6-oracle/lib/i386:/usr/lib/jvm/java-6-oracle/../lib/i386:/usr/java/packages/lib/i386:/lib:/usr/lib 16.11.2012 18:36:40 org.apache.coyote.AbstractProtocol init INFO: Initializing ProtocolHandler ["http-bio-8080"] 16.11.2012 18:36:40 org.apache.coyote.AbstractProtocol init INFO: Initializing ProtocolHandler ["ajp-bio-8009"] 16.11.2012 18:36:40 org.apache.catalina.startup.Catalina load INFO: Initialization processed in 1509 ms 16.11.2012 18:36:40 org.apache.catalina.core.StandardService startInternal INFO: Starting service Catalina 16.11.2012 18:36:40 org.apache.catalina.core.StandardEngine startInternal INFO: Starting Servlet Engine: Apache Tomcat/7.0.29 16.11.2012 18:36:40 org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory /usr/local/tomcat/webapps/manager Here come the results of ps -ef, iptables --list and netstat -plut: > ps -ef UID PID PPID C STIME TTY TIME CMD root 1 0 0 Nov16 ? 00:00:00 init root 2 1 0 Nov16 ? 00:00:00 [kthreadd/206616] root 3 2 0 Nov16 ? 00:00:00 [khelper/2066167] root 4 2 0 Nov16 ? 00:00:00 [rpciod/2066167/] root 5 2 0 Nov16 ? 00:00:00 [rpciod/2066167/] root 6 2 0 Nov16 ? 00:00:00 [rpciod/2066167/] root 7 2 0 Nov16 ? 00:00:00 [rpciod/2066167/] root 8 2 0 Nov16 ? 00:00:00 [nfsiod/2066167] root 119 1 0 Nov16 ? 00:00:00 upstart-udev-bridge --daemon root 125 1 0 Nov16 ? 00:00:00 /sbin/udevd --daemon root 157 125 0 Nov16 ? 00:00:00 /sbin/udevd --daemon root 158 125 0 Nov16 ? 00:00:00 /sbin/udevd --daemon root 205 1 0 Nov16 ? 00:00:00 upstart-socket-bridge --daemon root 276 1 0 Nov16 ? 00:00:00 /usr/sbin/sshd -D root 335 1 0 Nov16 ? 00:00:00 /usr/sbin/xinetd -dontfork -pidfile /var/run/xinetd.pid -stayalive -inetd root 348 1 0 Nov16 ? 00:00:00 cron syslog 368 1 0 Nov16 ? 00:00:00 /sbin/syslogd -u syslog root 472 1 0 Nov16 ? 00:00:00 /usr/lib/postfix/master postfix 482 472 0 Nov16 ? 00:00:00 qmgr -l -t fifo -u root 520 1 0 Nov16 ? 00:00:04 /usr/sbin/apache2 -k start www-data 523 520 0 Nov16 ? 00:00:00 /usr/sbin/apache2 -k start www-data 525 520 0 Nov16 ? 00:00:00 /usr/sbin/apache2 -k start www-data 526 520 0 Nov16 ? 00:00:00 /usr/sbin/apache2 -k start tomcat 1074 1 0 Nov16 ? 00:01:08 /usr/lib/jvm/java-6-oracle/bin/java -Djava.util.logging.config.file=/usr/ postfix 1351 472 0 Nov16 ? 00:00:00 tlsmgr -l -t unix -u -c postfix 3413 472 0 17:00 ? 00:00:00 pickup -l -t fifo -u -c root 3457 276 0 17:31 ? 00:00:00 sshd: root@pts/0 root 3459 3457 0 17:31 pts/0 00:00:00 -bash root 3470 3459 0 17:31 pts/0 00:00:00 ps -ef > iptables --list Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT tcp -- anywhere anywhere tcp dpt:http-alt ACCEPT tcp -- anywhere anywhere tcp dpt:8005 ACCEPT tcp -- anywhere anywhere tcp dpt:http-alt Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination > netstat -plut Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 *:smtp *:* LISTEN 472/master tcp 0 0 *:3213 *:* LISTEN 276/sshd tcp6 0 0 [::]:smtp [::]:* LISTEN 472/master tcp6 0 0 [::]:8009 [::]:* LISTEN 1074/java tcp6 0 0 [::]:3213 [::]:* LISTEN 276/sshd tcp6 0 0 [::]:http-alt [::]:* LISTEN 1074/java tcp6 0 0 [::]:http [::]:* LISTEN 520/apache2

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• How do I securely execute commands as root via a web control panel?

  - by Chris J

  I would like to build a very simple PHP based web based control panel to add and remove users to/from and add and remove sections to/from nginx config files on my linode vps (Ubuntu 8.04 LTS). What is the most secure way of executing commands as root based on input from a web based control panel? I am loathe to run PHP as root (even if behind an IP tables firewall) for the obvious reasons. Suggestions welcome. It must be possible as several commercial (and bloated, for my needs) control panels offer similar functionality. Thanks

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• Help: Best way to do a TV-out in 7300GT Nvidia video card?

  - by Martin Ongtangco

  I'm planning to recycle my old PC and build a Media Center using an open-source (C#) software called MediaPortal. My old PC has a GeForce 7300GT with a TV-out plug built-in. When I tested it last night, it wouldn't detect my JVC tv (CRT) using the current drivers. I even purchased a new copper-based TV-Out to RCA cable. I searched all 3 AV channels. The video card has 3 output ports: 2 DVI & 1 s-video. I used the s-video with a S-Video to RCA out cable. I swapped between PAL & NTSC So what I did was I downloaded the first version of an Nvidia driver for 7 series cards, but still even with the old console, it couldn't detect the TV. I'm running out of viable ideas. Anyone here had the same problem and fixed it? Any suggestion is appreciated. Thank you!

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• DIY Homemade Hybrid Rocket Engine [Video]

  - by Jason Fitzpatrick

  Remember the guy with the cool DIY astronaut ice cream build? He’s back with a mini hybrid rocket engine that runs off oxygen and acrylic. I built a small rocket engine for demonstration purposes. The engine is built from a 2″ diameter acrylic rod through which I drilled a 0.5″ hole. The oxygen at 80 psi or less is passed through the hole and then is forced through a convergent-divergent nozzle at the tail end. The nozzle’s throat is about 0.25″ and expands to 0.625″. I lit the engine by inserting a burning cotton swab (with wooden stick) while a small amount of oxygen was flowing. The acrylic catches fire very easily in a pure oxygen environment. The engine can be throttled and shut off completely, which is a major benefit to hybrid engine designs. Solid-fuel rockets cannot be throttled or shut off, which makes them difficult to control. [via Make] HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference How To Troubleshoot Internet Connection Problems

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• Is there a usable HTML web gallery template for Lightroom 2?

  - by Johannes Rössel

  The built-in HTML gallery unfortunately generates invalid HTML markup so its looks are likely more coincidence than proper design. That aside its JavaScript usage prevents using the middle mouse button to open an image in a new tab. A look at the few free HTML gallery templates out there shows me that there seems to be little interest in building an actual HTML gallery which doesn't use JavaScript. Most of them are using JS to build fancy animations or in-page popup boxes containing the image. This may be nice for some people but at least one person who looks at my images is on dial-up and quickly opening all images in individual tabs to let them load and then close the connection is very nice to have there. Anyone seen such a gallery template; i. e. simple, plain HTML without JS? My HTML/CSS skills aren't that good that I can develop such a thing on my own, unfortunately.

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• Windows Azure BidNow Sample &ndash; definitely worth a look

  - by Eric Nelson

  [Quicklink: download new Windows Azure sample from http://bit.ly/bidnowsample] On Mondays (17th May) in the  6 Weeks of Windows Azure training (Now full) Live Meeting call, Adrian showed BidNow as a sample application built for Windows Azure. I was aware of BidNow but had not found the time to take a look at it nor seems it running before. Adrian convinced me it was worth some a further look. In brief I like it :-) It is more than Hello World, but still easy enough to follow. Bid Now is an online auction site designed to demonstrate how you can build highly scalable consumer applications using Windows Azure. It is built using Visual Studio 2008, Windows Azure and uses Windows Azure Storage. Auctions are processed using Windows Azure Queues and Worker Roles. Authentication is provided via Live Id. Bid Now works with the Express versions of Visual Studio and above. There are extensive setup instructions for local and cloud deployment You can download from http://bit.ly/bidnowsample (http://code.msdn.microsoft.com/BidNowSample) and also check out David original blog post. Related Links UK based? Sign up to UK fans of Windows Azure on ning Check out the Microsoft UK Windows Azure Platform page for further links

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• CodePlex Daily Summary for Sunday, July 28, 2013

  CodePlex Daily Summary for Sunday, July 28, 2013Popular ReleasesMedia Companion: Media Companion MC3.574b: Some good bug fixes been going on with the new XBMC-Link function. Thanks to all who were able to do testing and gave feedback. New:* Added some adhoc extra General movie filters, one of which is Plot = Outline (see fixes above). To see the filters, add the following line to your config.xml: <ShowExtraMovieFilters>True</ShowExtraMovieFilters>. The others are: Imdb in folder name, Imdb in not folder name & Imdb not in folder name & year mismatch. * Movie - display <tag> list on browser tab ...Outlook 2013 Backup Add-In: Outlook Backup Add-In 1.0: Users who don't care about compiling the sources on his/her own can download the compiled version. Requirements: - .Net Framework 4.5 - Visual Studio 2010 Tools for Office Runtime see: http://www.microsoft.com/en-us/download/details.aspx?id=39290 - Installed Outlook 2013OfflineBrowser: Preview Release with Search: I've added search to this release.Dynamics CRM 2011 EasyPlugins: EasyPlugins-1.2.3.0-managed: v1.2.3.0 - Bug Fix : Twice plugins execution. - New Abort action - Depth Plugin Execution management on each action - Turn On/Off EasyPlugins feature (can be useful in some cases of imports) ----------------------------- v1.2.0.0 Associate / Disassociate actions are now available Import / Export features Better management of Lookups Trigger NamingMemory Teaser Game: Full Release 1.1.0: -> Fixed Memory leak issue. -> Restart game button issue. -> Added Splash screen. -> Changed Release Icon. This is the version 1.1.0.0VG-Ripper & PG-Ripper: VG-Ripper 2.9.46: changes FIXED LoginFIM 2010 GoogleApps MA: GoogleAppsMA1.1.2: Fixed bug during import. - Fixed following bug. - In some condition, 'dn is missing' error occur.Install Verify Tool: Install Verify Tool V 1.0 With Client: Use a windows service to do a remote validation work. QA can use this tool to verify daily build installation.C# Intellisense for Notepad++: 'Namespace resolution' release: Auto-Completion from "empty spot" Add missing "using" statementsOpen Source SAAS Job board: Version X3: Full version of job board, didn't have monies to fund it so it's free.DSeX DragonSpeak eXtended Editor: Version 1.0.116.0726: Cleaned up Wizard Interface Added Functionality for RTF UndoRedo IE Inserting Text from Wizard output to the Tabbed Editor Added Sanity Checks to Search/Replace Dialog to prevent crashes Fixed Template and Paste undoredo Fix Undoredo Blank spots Added New_FileTag Const = "(New FIle)" Added Filename to Modified FileClose queries (Thanks Lothus Marque)Math.NET Numerics: Math.NET Numerics v2.6.0: What's New in Math.NET Numerics 2.6 - Announcement, Explanations and Sample Code. New: Linear Curve Fitting Linear least-squares fitting (regression) to lines, polynomials and linear combinations of arbitrary functions. Multi-dimensional fitting. Also works well in F# with the F# extensions. New: Root Finding Brent's method. ~Candy Chiu, Alexander Täschner Bisection method. ~Scott Stephens, Alexander Täschner Broyden's method, for multi-dimensional functions. ~Alexander Täschner ...AJAX Control Toolkit: July 2013 Release: AJAX Control Toolkit Release Notes - July 2013 Release Version 7.0725July 2013 release of the AJAX Control Toolkit. AJAX Control Toolkit .NET 4.5 – AJAX Control Toolkit for .NET 4.5 and sample site (Recommended). AJAX Control Toolkit .NET 4 – AJAX Control Toolkit for .NET 4 and sample site (Recommended). AJAX Control Toolkit .NET 3.5 – AJAX Control Toolkit for .NET 3.5 and sample site (Recommended). Notes: - Instructions for using the AJAX Control Toolkit with ASP.NET 4.5 can be found at...MJP's DirectX 11 Samples: Specular Antialiasing Sample: Sample code to complement my presentation that's part of the Physically Based Shading in Theory and Practice course at SIGGRAPH 2013, entitled "Crafting a Next-Gen Material Pipeline for The Order: 1886". Demonstrates various methods of preventing aliasing from specular BRDF's when using high-frequency normal maps. The zip file contains source code as well as a pre-compiled x64 binary.Kartris E-commerce: Kartris v2.5003: This fixes an issue where search engines appear to identify as IE and so trigger the noIE page if there is not a non-responsive skin specified.GoAgent GUI: GoAgent GUI 1.3.5 Alpha (20130723): ????????Alpha?，???????????，?????????????。 ??????????GoAgent???（???phus lu?GitHub??????GoAgent??????，??????????????????） ????????????????????????Bug ?????????。??????????????。 ????issue????，????????，????????????????。LogicCircuit: LogicCircuit 2.13.07.22: Logic Circuit - is educational software for designing and simulating logic circuits. Intuitive graphical user interface, allows you to create unrestricted circuit hierarchy with multi bit buses, debug circuits behavior with oscilloscope, and navigate running circuits hierarchy. Changes of this versionYou can make visual elements of the circuit been visible on its symbols. This way you can build composite displays, keyboards and reuse them. Please read about displays for more details http://ww...Microsoft .NET SDK For Hadoop: v 0.9.4951.25594: Bug fixesLINQ to Twitter: LINQ to Twitter v2.1.08: Supports .NET 3.5, .NET 4.0, .NET 4.5, Silverlight 4.0, Windows Phone 7.1, Windows Phone 8, Client Profile, Windows 8, and Windows Azure. 100% Twitter API coverage. Also supports Twitter API v1.1! Also on NuGet.AcDown?????: AcDown????? v4.4.3: ??●AcDown??????????、??、??、???????。????，????，?????????????????????????。???????????Acfun、????(Bilibili)、??、??、YouTube、??、???、??????、SF????、????????????。 ●??????AcPlay?????，??????、????????????????。 ● AcDown???????C#??，????.NET Framework 2.0??。?????"Acfun?????"。 ??v4.4.3 ?? ??Bilibili????????????? ???????????? ????32??64? Windows XP/Vista/7/8 ???? 32??64? ???Linux ????(1)????????Windows XP???，????????.NET Framework 2.0???(x86)，?????"?????????"??? (2)???????????Linux???，????????Mono?? ??2.10?...New ProjectsAM2013: Unexpected GameChekad: This is a simple small project.DataBaseSchema: DataBase Schema Management!edirAuth: edirAuth is a .NET library for LDAP authentication to NetIQ (formerly Novell©) eDirectory. If you are a NetIQ Identity Management user you are probably using Gimme Rainbows: This is a simple project that can be used to generate Rainbow table from a given dictionary and given salt file. Hashes of various formats can be generated.Heavy Bomber: Heavy Bomber XNA GameIRIS Toolbox [I Rest, IRIS Solves...]: IRIS is a Matlab toolbox for macroeconomic modeling.OpenZapper: OpenZapper is an open source Zapper project. It is mainly a Frequency generator.Sponge - SharePoint Framework: Sponge is a SharePoint Frameworks that contains centralized logging and configuration, as well as other useful Controls, Web Parts and Application Pages.wangyexin: ?????wupantest: atwelltestYemek Menusu: Yemek Menusu

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• Running remotely an app from a shared folder with PsExec

  - by Stephane

  I am actually not sure that this is possible. let's see: I have a script that runs on a Build server. Let's name this server A. It drops the bins to a shared folder on server B. And I want to run the program on server C. So using caspol I can allow the executable to be ran remotely. that means from B I can run \C\shared\my.exe What I want to do is from A run \C\shared\my.exe on B. SysInternals\PsExec.exe -u username -p password -accepteula \\ServerC -i 0 -d -w \\ServerB\Nightly\Server \\ServerB\Nightly\Server\server.exe The user has all the necessary rights. But, the -w (working directory) options apparently wants a path relative to the server I point to. Any idea?

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• As an indie game dev, what processes are the best for soliciting feedback on my design/spec/idea? [closed]

  - by Jess Telford

  Background I have worked in a professional environment where the process usually goes like the following: Brain storm idea Solidify the game mechanics / design Iterate on design/idea to create a more solid experience Spec out the details of the design/idea Build it Step 3. is generally done with the stakeholders of the game (developers, designers, investors, publishers, etc) to reach an 'agreement' which meets the goals of all involved. Due to this process involving a series of often opposing and unique view points, creative solutions can surface through discussion / iteration. This is backed up by a process for collating the changes / new ideas, as well as structured time for discussion. As a (now) indie developer, I have to play the role of all the stakeholders (developers, designers, investors, publishers, etc), and often find myself too close to the idea / design to do more than minor changes, which I feel to be local maxima when it comes to the best result (I'm looking for the global maxima, of course). I have read that ideas / game designs / unique mechanics are merely multipliers of execution, and that keeping them secret is just silly. In sharing the idea with others outside the realm of my own thinking, I hope to replicate the influence other stakeholders have. I am struggling with the collation of changes / new ideas, and any kind of structured method of receiving feedback. My question: As an indie game developer, how and where can I share my ideas/designs to receive meaningful / constructive feedback? How can I successfully collate the feedback into a new iteration of the design? Are there any specialized websites, etc?

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• AMD Phenom II X4 965 crossfire motherboard

  - by Nick

  I am trying to build a cheap mining rig. I wanted to use the AMD Phenom II X4 965 (HDZ965FBGMBOX) processor as it got very good reviews and benchmarks, and is inexpensive. However, I am having trouble finding motherboards with crossfire support for 2 GPUs. AMD's website only lists five compatible motherboards, of which only one has crossfire support. Worse, it is expensive and seems to be obsolete and no longer available. I have trouble believing that there are only five compatible motherboards for that CPU. Are there any low-end motherboards that are both compatible with the AMD Phenom II X4 965 and have CrossFire support? (Is there a way to find this sort of information, like a central site that lists motherboards and their technical specifications?)

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• Quantifying the value of refactoring in commercial terms

  - by Myles McDonnell

  Here is the classic scenario; Dev team build a prototype. Business mgmt like it and put it into production. Dev team now have to continue to deliver new features whilst at the same time pay the technical debt accrued when the code base was a prototype. My question is this (forgive me, it's rather open ended); how can the value of the refactoring work be quantified in commercial terms? As developers we can clearly understand and communicate the value in technical terms, such a the removal of code duplication, the simplification of an object model and so on. But this means little to an executive focussed on the commercial elements. What will mean something to this executive is the dev. team being able to deliver requirements at faster velocity. Just making this statement without any metrics that clearly quantify return on investment (increased velocity in return for resource allocated to refactoring) carries little weight. I'm interested to hear from anyone who has had experience, positive or negative, in relation to the above. ----------------- EDIT ---------------- Thanks for the responses so far, all of which I think are good. What I want to develop is a metric that proves (or disproves!) all of these statements. A report that ties velocity to refactoring and shows a positive effect.

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• Data Structures usage and motivational aspects

  - by Aubergine

  For long student life I was always wondering why there are so many of them yet there seems to be lack of usage at all in many of them. The opinion didn't really change when I got a job. We have brilliant books on what they are and their complexities, but I never encounter resources which would actually give a good hint of practical usage. I perfectly understand that I have to look at problem , analyse required operations, look for data structure that does them efficiently. However in practice I never do that, not because of human laziness syndrome, but because when it comes to work I acknowledge time priority over self-development. Over time I thought that when I would be better developer I will automatically use more of them - that didn't happen at all or maybe I just didn't. Then I found that the colleagues usually in the same plate as me - knowing more or less some three of data structures and being totally happy about it and refusing to discuss this matter further with me, coming back to conversations about 'cool new languages' 'libraries that do jobs for you' and the joy to work under scrumban etc. I am stuck with ArrayLists, Arrays and SortedMap , which no matter what I do always suffice or either I tweak them to be capable of fulfilling my task. Yes, it might be inefficient but do we really have to care if Intel increases performance over years no matter if we improve our skills? Does new Xeon or IBM machines really care what we use? What if I like build things, but I am not particularly excited whether it is n log(n) or just n? Over twenty years the processing power increased enormously, which gives us freedom of not being critical about which one to use? On top of that new more optimized languages appear which support multiple cores more efficiently. To be more specific: I would like to find motivational material on complex real areas/cases of possible effective usages of data structures. I would be really grateful if you would provide relevant resources. There is similar question ,but in the end the links again mostly describe or do dumb example(vehicles, students or holy grail quest - yes, very relevant) them and people keep referring to the "scenario decides the data structure to use". I want to know these complex scenarios to be able to identify similarities to my scenario and then use them. The complex scenarios where it really matters and not necessarily of quantitive nature. It seems that data structures only concern is efficiency and nothing else? There seems to be no particular convenience for developer in use one over another. (only when I found scientific resources on why exactly simple carbohydrates are evil I stopped eating sugar and candies completely replacing it with less harmful fruits - I hope you can see the analogy)

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• Splitting big request in multiple small ajax requests

  - by Ionut

  I am unsure regarding the scalability of the following model. I have no experience at all with large systems, big number of requests and so on but I'm trying to build some features considering scalability first. In my scenario there is a user page which contains data for: User's details (name, location, workplace ...) User's activity (blog posts, comments...) User statistics (rating, number of friends...) In order to show all this on the same page, for a request there will be at least 3 different database queries on the back-end. In some cases, I imagine that those queries will be running quite a wile, therefore the user experience may suffer while waiting between requests. This is why I decided to run only step 1 (User's details) as a normal request. After the response is received, two ajax requests are sent for steps 2 and 3. When those responses are received, I only place the data in the destined wrappers. For me at least this makes more sense. However there are 3 requests instead of one for every user page view. Will this affect the system on the long term? I'm assuming that this kind of approach requires more resources but is this trade of UX for resources a good dial or should I stick to one plain big request?

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• How to fix audio/game stuttering in Google Chrome's Flash plug-in?

  - by Simon Belmont

  I'm having an issue. Windows XP, running the latest Chrome 23 build. I'm using Flash 11.5 built into Chrome (Pepper Flash). It runs horribly. Chrome 22 did not have this issue as far as I recall. What a shame. YouTube videos stutter badly and after a while, they begin to lag and lose sync with the video. I disabled Pepper Flash and tested HTML5 video in YouTube and it was smooth as glass. Additionally, certain Flash based games are almost unusable now. The plug-in is using 100% CPU and it lags horribly in these games. Google/Adobe, please fix this. I shouldn't have to disable the built-in Flash plug-in (with added sandboxing security) and use regular Flash to resolve this. Short of waiting for an update to Chrome, does anyone have a better solution to fixing this? I am all ears.

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• ArchBeat Link-o-Rama for 2012-09-20

  - by Bob Rhubart

  Attend OTN Architect Day – by Architects, for Architects – October 25 You won't need 3D glasses to take in these live presentations (8 sessions, two tracks) on Cloud computing, SOA, and engineered systems. And the ticket price is: Zero. Nothing. Absolutely free. Register now for Oracle Technology Network Architect Day in Los Angeles. Thursday October 25, 2012, 8:00am – 5:00pm Sofitel Los Angeles8555 Beverly BoulevardLos Angeles, CA 90048 Loving VirtualBox 4.2… | The ORACLE-BASE Blog Is it wrong for a man to love a technology? Oracle ACE Director Tim Hall has several very good reasons for his feelings… Running RichFaces on WebLogic 12c | Markus Eisele "With all the JMS magic and the different provider checks in the showcase this has become some kind of a challenge to simply build and deploy it," says Oracle ACE Director Markus Eisele. His detailed post will help you to meet that challenge. Oracle ADF Coverage at OOW | Frank Nimphius Frank Nimphius shares a comprehensive and well-organized list of Oracle ADF sessions and activities scheduled for Oracle OpenWorld in San Francisco. OIM 11g R2 Catalog Customization Example | Daniel Gralewski Oracle Fusion Middleware A-Team member Daniel Gralewski's post shows "how OIM catalog can be customized by using OIM UI capabilities such as managed beans and EL expressions. The post first describes the use case and the solution to address the use case; then it describes the solution details as well as provides links to the artifacts." New Book: Oracle BPM Suite 11g: Advanced BPMN Topics | Mark Nelson Redstack blogger Mark Nelson shares an overview of Oracle BPM Suite 11g: Advanced BPMN Topics, the new book he co-authored with Tanya Williams. Nelson describes the book as "a concise presentation of both theory and practical examples of the areas of BPMN where we have encountered the most widespread confusion and misunderstanding." Thought for the Day "I strive for an architecture from which nothing can be taken away." — Helmut Jahn Source: Brainy Quote

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• Game Resource Generation

  - by Darthg8r

  I am currently building a game that has a "City" entity. These cities generate and consume resources such as food variably over a period of time. I need to be able query the server often to find exactly how much food the city at any given point. These queries can take place multiple times per minute. There could also be 400,000 cities to track at a given time. How would you handle tracking these resources? Would you do it in real time, keeping an instance of the city in memory on the server, with some sort of a snapshot in time of the resources, then computing the growth/consumption from that snapshot time for subsequent queries? Would you work exclusively with a database, using a similar "snapshoting" scheme? Maybe a mixture of the 2, caching recently queried cities in memory for a period of time? There is also a lot of other data that each city needs to track. A player can queue units to build in a barrack. The armies available in the city will need to be updated as units complete. I'm interested in everyone's input on where/when/how you'd manage the real time data.

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• Would adding award points or game features to workplace software be viewed poorly amongst the programming community?

  - by Eric P

  So one of my responsibilities at work is to build an internal tool that helps the workers enter in all their information. It's an enterprise application that is similar to a Windows forms database tool. So it's not much different than like developing a Word + Excel combo application, but the average person in this workgroup is a 20-40 year old woman or a random chatty male type. Plus I know all of these people are heavily involved with Facebook on a daily basis. How bad would it be if I styled my new interface to be similar to what Facebook does. People could get award points and stuff when they fill out different types of forms and basically compete against each other like it was a game. When people had completed one, it would be posted on their wall and everyone could comment/like stuff just like in Facebook. And it would be like they are doing peer reviewing for fun. The rewards would be outstanding I would imagine. These people are so into Facebook and Facebook games that productivity would rise due to them trying to compete and earn points and achievements. Would this be taking advantage of the people by 'tricking them into working harder by giving them a game' or would it be viewed as something that would improve happiness at work?

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• A Facelift for Fusion

  - by Richard Lefebvre

  It's simple. It's modern. It was the buzz at OpenWorld in San Francisco. See what the UX team has been up to and what customers are going to love. At OpenWorld 2012, the Oracle Applications User Experience (UX) team unveiled the new face of Fusion Applications. You might have seen it in sessions presented by Chris Leone, Anthony Lye, Jeremy Ashley and others or you may have gotten a look on the demogrounds. Why are we delivering a new face for Fusion Applications? "Because," says Ashley, vice president of the Oracle Applications User Experience team, "we want to provide a simple, modern, productive way for users to complete their top quick-entry tasks. The idea is to provide a clear, productive user experience that is backed by the full functionality of Fusion Applications." The first release of the new face of Fusion focuses on three types of users. It provides a fully functional gateway to Fusion Applications for: ·         New and casual users who need quick access to self-service tasks ·         Professional users who need fast access to quick-entry, high-volume tasks ·         Users who are looking for a way to quickly brand their portal for employees The new face of Fusion allows users to move easily from navigation to action, Ashley said, and it has been designed for any device -- Mac, PC, iPad, Android, SmartBoard -- in the browser. How Did We Build It? The new face of Fusion essentially is a custom shell, developed by the Apps UX team, and a set of page templates that embodies a simple design aesthetic. It's repeatable, providing consistency across its pages, and the need for training is little to zero. More specifically, the new face of Fusion has been built on ADF. The Applications UX team created pages in JDeveloper using local tasks flows bound to existing view objects. Three new components were commissioned from ADF and existing Fusion components were re-skinned to deliver a simple, modern user experience. It really is that simple - and to prove that point, we've been sharing our new face of Fusion story on several Oracle channels such as this one. If you want to learn more, check OpenWorld presentation on the Fusion Learning Center.

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• Connecting both WAN and LAN ports to the same hub

  - by C. Lee

  For some reason I wish to connect the WAN port and the LAN port on a router to the same hub and make the hub is connected to both networks, the Internet and a private network. Below is a diagram of the network configuration I'd like to build. I tried this and it didn't work as expected. PC 1 has no problem, but PC 2 cannot connect to the Internet. When I ping 192.168.0.1 from PC 2, all packets are lost. It works well when PC 2 is connected directly to the router. What's the problem with the network configuration above?

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• Grow Your Oracle Exadata and Manageability Business: Engage With Us to Find Out How

  - by swalker

  Don't miss out on the first EMEA Partner Community Cast! If you are a business decision maker, project leader, technical leader or business development manager you will gain incredible value from these events, and we believe that this introduction to Oracle Partner Communities will bring you a wealth of new opportunities. Join Us on December 7th, 10:00 GMT (11:00 CET) for the first broadcast the Exadata and Manageability solution areas. In just 30 minutes, you will find out more about Oracle's Exadata, Manageability and Oracle Enterprise Manager 12c solutions, and the value they can generate for you and your customers. See the full agenda here. Hosted by Paul Thompson, Senior Director, Alliances and Solutions Partner Programs, Oracle EMEA and Javier Puerta, Director, Core Technology Partner Programs, Oracle EMEA, our special guests include: Steve McNickle, Vice President Europe, cVidya Dave Sanderson, Associate Partner, Technology Reply Patrick Rood, Lead for Indirect Manageability Business, Oracle EMEA Register Now Partner Community Casts are a new series of interactive broadcasts designed to help you truly engage with Oracle on an individual level, build expertise around your specialist solution area and make valuable new contacts in Oracle and other Oracle partners. Community Casts can be viewed live from our online platform. Audience members have the opportunity to submit questions during the show via chat or social media outlets, many of which are answered on-air. Learn more about EMEA Partner Community Casts Register Now to learn how participation in the Exadata and Manageability Partner Communities will help your business flourish!

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• fix vmware workstation 9 installation in ubuntu 12.10

  - by Alessandro Belloni

  i have opened this thread because i upgraded to ubuntu 12.10 beta (kernel 3.5) and i have problem with vmware workstation 9: "Unable to change virtual machine power state: Cannot find a valid peer process to connect to" does anyone got the same problem? Clean install of ubuntu 12.10 (daily build) installed vmware 9 and patched but not working, my laptop is a Lenovo T420 with Nvidia Optimus Technology. i can't patch correctly and get the thinks be builded correctly, my configuration is ubuntu 12.10 fresh installation vmware workstation 9 fresh install on top of a lenovo thikpad t420 with nvidia optimus video card. have a problems.. this message is show whem i try to apply the patch.. # Stopping VMware services: VMware Authentication Daemon done At least one instance of VMware VMX is still running. Please stop all running instances of VMware VMX first. VMware Authentication Daemon done Unable to stop services # How can i stop the vmware services to apply the patch? This message is too show when i try to patch again # ./patch-modules_3.5.0.sh /usr/lib/vmware/modules/source/.patched found. You have already patched your sources. Exiting # But the vmware is not working, and i can’t unstall…

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• Installing Plone on Centos fails: Unable to find libssl or openssl/ssl.h.

  - by paskster

  My dedicated Server has CentOS 5.5. I tried to install Plone, so I basically did: wget launchpad.net/plone/4.0/4.0.2/+download/Plone-4.0.2-UnifiedInstaller.tgz tar xzf Plone-4.0.2-UnifiedInstaller.tgz cd Plone-4.0.2-UnifiedInstaller ./install.sh zeo I ran into the following error: Unable to find libssl or openssl/ssl.h. If you wish to build without SSL support, run install.sh again with --without-ssl flag. Otherwise, install your platform's openssl-dev libraries and headers and try again. After this error I successfully installed openssl: yum install openssl And i tried to install Plone again. But I keep getting the error: "Unable to find libssl or openssl/ssl.h". Anybody an idea what I'missing?

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• sysprep'd Server 2008 R2 VMware autocheck BSODs

  - by slag

  I'm trying to set up a template Server 2k8 R2 (Standard) VM in our VMware ESXi environment, we'll need to deploy a whole lot of them and I want to (a) streamline and (b) standardise the server build process. Originally I built a sysprep answer file using WAIK and the Windows System Image Manager - once I'd run sysprep using this, restarting the machine resulted in a "autochk.exe not found - skipping autocheck" message, followed almost immediately by a BSOD. Rebooting just resulted in the same thing. I first assumed it was my answer file, but have now checked this on a physical machine and it works fine. I've reinstalled the OS on the machine (and NOTHING else), and run sysprep.exe (ticking Generalize) - this produces exactly the same result. I've also attempted to use the Customisation Wizard built in to VMware - again, the same autocheck message and BSOD is the result. Any ideas? Let me know any further information I need to provide...

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