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• Moving objects colliding when using unalligned collision avoidance (steering)

  - by James Bedford

  I'm having trouble with unaligned collision avoidance for what I think is a rare case. I have set two objects to move towards each other but with a slight offset, so one of the objects is moving slightly upwards, and one of the objects is moving slightly downwards. In my unaligned collision avoidance steering algorithm I'm finding the points on the object's forward line and the other object's forward line where these two lines are the closest. If these closest points are within a collision avoidance distance, and if the distance between them is smaller than the two radii of the two object's bounding spheres, then the objects should steer away in the appropriate direction. The problem is that for my case, the closest points on the lines are calculated to be really far away from the actual collision point. This is because the two forward lines for each object are moving away from each other as the objects pass. The problem is that because of this, no steering takes place, and the two objects partially collide. Does anyone have any suggestions as to how I can correctly calculate the point of collision? Perhaps by somehow taking into account the size of the two objects?

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• Robots &amp; Pencils Bring iOS Dev Camp/Dev School to Winnipeg

  - by D'Arcy Lussier

  My buddy Paul Thorsteinson from Robots and Pencils has come up with an elaborate way to collect his Mac power adaptor that I keep forgetting to mail to him – he’s coming to town with Jonathan Rasmusson to run an iPhone Dev Camp and two-day Dev School here in Winnipeg! From the email he sent me: We are going to be bringing our successful iOS dev school out to the 'Peg in October as well has hosting a dev camp on the Friday night (comparable to a .net user group type deal).  If you know any peeps in Manitoba who are interested in these, please pass along!  .Net developers are welcome to come and heckle as well ;) Winnipeg iPhone Dev Camp October 26th Marlborough Hotel, 5:30pm Cost: $10 http://ios-dev-camp-winnipeg-eorg.eventbrite.com/ ^for devs of any level interested in meeting other devs hearing talks of all levels.  Food and networking Winnipeg iPhone Dev School October 27th, 28th, Marlborough Hotel Cost: $899 + GST http://academy.robotsandpencils.com/training ^For devs looking to get their feet wet in iOS dev Paul has spoken at Prairie Dev Con before and is vastly knowledgeable in mobile development. You can see his work in Spy vs Spy, Catch the Princess, World Explorer for Minecraft, Deco Windshield (yes they run their entire business on their iPad), Anthm, Own This World and too many other apps. If you’re into iOS development, looking to get in, or wanting to improve your skills, consider these great professional development opportunities! D

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• Please, tell us how you made Agile work for you?

  - by Paul

  I've been seeing many questions related to Agile. There seems to be confusion between the people who are doing Agile successfully, and those of us who don't understand it. So I'm wondering if some of the successful teams would be willing to give the result of us some examples of how you succeeded. Some of the things I know I wonder What steps did you use? (ie. Talk to users, mock up, tests, code, testing, (whatever)) Tools that helped you? Did you generate any artifacts, other than a working implementation? How did you prevent spaghetti architecture / code? How do you pass along to new team members, or is the team stable for the project How did you determine exit criteria, or was it open ended. (Scope of project?) Did you do this as contracting? How did you develop a contract up-front? Did the business do any up front work? Or did they come to the table with "We want to implement a "bleh bleh blah"? What types of tests did you use? Unit, Integration, UAT? Or did the process make some/all of those unnecessary? Bonus: Do you have an situations / links to "How To" Agile articles, books, etc? Wiki, describes what but not how (to the uninitiated) At least to me, not a duplicate

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• One Step-Ahead A-Star

  - by Jonathan Dickinson

  I am attempting to create a server-centric RTS (as opposed to usual parallel synchronised simulation route of most RTS games today) - however I am still leveraging the discreet N-turns-ahead paradigm discussed by one of the AOE developers on Gamasutra. I have [possibly questionably?] decided that the path finding should only ever find the next cell the entity needs to move to, and was wondering if anyone has any clever ideas on how to optimize the algorithm for this specific scenario - or any other ideas on how to keep the pathfinding as lean as possible on the server. I have investigated a few possible algorithms but could only come up with one appropriation: Tiered A-Star - Relatively large T1 tiles, work out (and cache) each cell as you enter it. Other than that: doing the full A-Star pass and caching the entire path, which might use too much memory if a large amount of units are present. I know about the existence of naive progressive pathfinding algorithms (if you hit a block, turn in the direction closer to your target etc.) but they suffer from infinite feedback loops - and very poor pathing even if visited blocks are memorised. Not an option. Many thanks.

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• Functional programming compared to OOP with classes

  - by luckysmack

  I have been interested in some of the concepts of functional programming lately. I have used OOP for some time now. I can see how I would build a fairly complex app in OOP. Each object would know how to do things that object does. Or anything it's parents class does as well. So I can simply tell Person().speak() to make the person talk. But how do I do similar things in functional programming? I see how functions are first class items. But that function only does one specific thing. Would I simply have a say() method floating around and call it with an equivalent of Person() argument so I know what kind of thing is saying something? So I can see the simple things, just how would I do the comparable of OOP and objects in functional programming, so I can modularize and organize my code base? For reference, my primary experience with OOP is Python, PHP, and some C#. The languages that I am looking at that have functional features are Scala and Haskell. Though I am leaning towards Scala. Basic Example (Python): Animal(object): def say(self, what): print(what) Dog(Animal): def say(self, what): super().say('dog barks: {0}'.format(what)) Cat(Animal): def say(self, what): super().say('cat meows: {0}'.format(what)) dog = Dog() cat = Cat() dog.say('ruff') cat.say('purr')

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• Halloween: Season for Java Embedded Internet of Spooky Things (IoST) (Part 5)

  - by hinkmond

  So, here's the finished product. I have 8 networked Raspberry Pi devices strategically placed around our Oracle Santa Clara Building 21 office. I attached a JFET transistor based EMF sensor on each device to capture any strange fluctuations in the electromagnetic field (which supposedly, paranormal spirits can change as they pass by). And, I have have a Web app (embedded in this page) which can take the readings and show a graphical display in real-time. As you can see, all the Raspberry Pi devices are blinking away green, indicating they are all operational and all sensors are working correctly. But, I don't see anything... Darn... Maybe, I have to stare at the Web app for a while. I don't know when the "alleged" ghosts in our Oracle Santa Clara office are supposed to be active, but let me know if you see anything... Oh, and by the way, Happy Halloween from the Internet of Spooky Things! See the previous posts for the full series on the steps to this cool demo: Halloween: Season for Java Embedded Internet of Spooky Things (IoST) (Part 1) Halloween: Season for Java Embedded Internet of Spooky Things (IoST) (Part 2) Halloween: Season for Java Embedded Internet of Spooky Things (IoST) (Part 3) Halloween: Season for Java Embedded Internet of Spooky Things (IoST) (Part 4) Halloween: Season for Java Embedded Internet of Spooky Things (IoST) (Part 5) Hinkmond

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• JavaOne + Develop Registration is Open!

  - by justin.kestelyn

  Welcome to "The Zone". Here's what the new JavaOne + Develop registration Website says: The world's most important developer conferences are creating the world's coolest neighborhood for the developer community. Having been intimately involved in the planning process, I can vouch for that statement. Remember, if either co-located conference - JavaOne or Oracle Develop - are the confines of your interest, you can experience either one in standalone mode, if you like (although there are some areas of common interest, of course). Or, considering that a single Full Conference Pass gives you access to both of them, you can partake in any measure that you like. It's up to you. Either way, you will get access not only to session content and keynotes, but also to the massive OTN Night party on Monday night, to open unconference sessions, and to the legendary Appreciate Night concert (acts TBD) on Wednesday. Furthermore, as is customary, the Oracle Technology Network team will offer a full slate of community-focused activities and goodies while the conferences are running - more details on those as we have them. A GOOD time is ensured for all; I look forward to seeing you there!

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• Purpose oriented user accounts on a single desktop?

  - by dd_dent

  Starting point: I currently do development for Dynamics Ax, Android and an occasional dabble with Wordpress and Python. Soon, I'll start a project involving setting up WP on Google Apps Engine. Everything is, and should continue to, run from the same PC (running Linux Mint). Issue: I'm afraid of botching/bogging down my setup due to tinkering/installing multiple runtimes/IDE's/SDK's/Services, so I was thinking of using multiple users, each purposed to handle the task at hand (web, Android etc) and making each user as inert as possible to one another. What I need to know is the following: Is this a good/feasible practice? The second closest thing to this using remote desktops connections, either to computers or to VM's, which I'd rather avoid. What about switching users? Can it be made seamless? Anything else I should know? Update and clarification regarding VM's and whatnot: The reason I wish to avoid resorting to VM's is that I dislike the performance impact and sluggishness associated with it. I also suspect it might add a layer of complexity I wish to avoid. This answer by Wyatt is interesting but I think it's only partly suited for requirements (web development for example). Also, in reference to the point made about system wide installs, there is a level compromise I should accept as experessed by this for example. This option suggested by 9000 is also enticing (more than VM's actually) and by no means do I intend to "Juggle" JVMs and whatnot, partly due to the reason mentioned before. Regarding complexity, I agree and would consider what was said, only from my experience I tend to pollute my work environment with SDKs and runtimes I tried and discarded, which would occasionally leave leftovers which cause issues throught the session. What I really want is a set of well defined, non virtualized sessions from which I can choose at my leisure and be mostly (to a reasonable extent) safe from affecting each session from the other. And what I'm really asking is if and how can this be done using user accounts.

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• design for supporting entities with images

  - by brainydexter

  I have multiple entities like Hotels, Destination Cities etc which can contain images. The way I have my system setup right now is, I think of all the images belonging to this universal set (a table in the DB contains filePaths to all the images). When I have to add an image to an entity, I see if the entity exists in this universal set of images. If it exists, attach the reference to this image, else create a new image. E.g.: class ImageEntityHibernateDAO { public void addImageToEntity(IContainImage entity, String filePath, String title, String altText) { ImageEntity image = this.getImage(filePath); if (image == null) image = new ImageEntity(filePath, title, altText); getSession().beginTransaction(); entity.getImages().add(image); getSession().getTransaction().commit(); } } My question is: Earlier I had to write this code for each entity (and each entity would have a Set collection). So, instead of re-writing the same code, I created the following interface: public interface IContainImage { Set<ImageEntity> getImages(); } Entities which have image collections also implements IContainImage interface. Now, for any entity that needs to support adding Image functionality, all I have to invoke from the DAO looks something like this: // in DestinationDAO::addImageToDestination { imageDao.addImageToEntity(destination, imageFileName, imageTitle, imageAltText); // in HotelDAO::addImageToHotel { imageDao.addImageToEntity(hotel, imageFileName, imageTitle, imageAltText); It'd be great help if someone can provide me some critique on this design ? Are there any serious flaws that I'm not seeing right away ?

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• The tale of how the PowerShell CmdLets got installed with Azure SDK 1.4

  - by Enrique Lima

  I installed the Azure SDK 1.4 while rebuilding my laptop and ran the installation for the Windows Azure Service Management PowerShell CmdLets. Kicked off the installation script for the WASM PowerShell CmdLets by locating the path to which WASM PowerShell CmdLets was deployed to. Double clicked the startHere command. It will then open the WASM installation dialog. Click Next. Click Next. Notice the red x next to the Azure SDK 1.3, the problem is I have SDK 1.4 Here is the workaround, I go back to the location of the deployed WASM sources. Go into the setup path, then scripts>dependencies>check. Now, locate the CheckAzureSDK.ps1 file, and right-click, then edit. This is the content in the ps1 file, it check for the specific version of the Azure SDK, in this case, it is looking for version 1.3.11133.0038. We need for it to check for version 1.4.20227.1419 Now, save your ps1 file, go back to the open WASM install dialog, and click rescan. This time it should pass, then click next. A Command prompt window will appear, click any key. This completes the installation, click Close.

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• Static DataTable or DataSet in a class - bad idea?

  - by Superbest

  I have several instances of a class. Each instance stores data in a common database. So, I thought "I'll make the DataTable table field static, that way every instance can just add/modify rows to its own table field, but all the data will actually be in one place!" However, apparently it's a bad idea to do use static fields, especially if it's databases: Don't Use "Static" in C#? Is this a bad idea? Will I run into problems later on if I use it? This is a small project so I can accept no testing as a compromise if that is the only drawback. The benefit of using a static database is that there can be many objects of type MyClass, but only one table they all talk to, so a static field seems to be an implementation of exactly this, while keeping syntax concise. I don't see why I shouldn't use a static field (although I wouldn't really know) but if I had to, the best alternative I can think of is creating one DataTable, and passing a reference to it when creating each instance of MyClass, perhaps as a constructor parameter. But is this really an improvement? It seems less intuitive than a static field.

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• what's the difference between Routed Events and Attached Events?

  - by vverma01

  I tried to find through various sources but still unable to understand difference between routed events and attached events in WPF. Most of the places of reference for attached event following example is used: <StackPanel Button.Click="StackPanel_Click"> <Button Content="Click Me!" Height="35" Width="150" Margin="5" /> </StackPanel> Explained as: stack panel do not contain Click event and hence Button.Click event is attached to Stack Panel. Where as msdn says: You can also name any event from any object that is accessible through the default namespace by using a typename.event partially qualified name; this syntax supports attaching handlers for routed events where the handler is intended to handle events routing from child elements, but the parent element does not also have that event in its members table. This syntax resembles an attached event syntax, but the event here is not a true attached event. Instead, you are referencing an event with a qualified name. According to MSDN information as pasted above, the above example of Buttons and StackPanel is actually a routed event example and not true attached event example. In case if above example is truly about usage of attached event (Button.Click="StackPanel_Click") then it's in contradiction to the information as provided at MSDN which says Another syntax usage that resembles typename.eventname attached event syntax but is not strictly speaking an attached event usage is when you attach handlers for routed events that are raised by child elements. You attach the handlers to a common parent, to take advantage of event routing, even though the common parent might not have the relevant routed event as a member. A similar question was raised in this Stack Overflow post, but unfortunately this question was closed before it could collect any response. Please help me to understand how attached events are different from routed events and also clarify the ambiguity as pointed above.

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• Baseline for GIS Applications

  - by Geertjan

  The application I introduced here yesterday can best be understood via its author's explanation: "As I developed several different WorldWind-based applications, I noticed that they all started out the same. Terramenta was born so I wouldn't have to recreate the baseline every time, I could just provide NetBeans plugin modules to introduce the new features required by different projects." So, to try it out for myself, I checked out the sources from the Mercurial repo today, built them, and ran them. hg clone https://bitbucket.org/heidtmare/terramenta On Windows, things worked fine, on Ubuntu they didn't because the relevant native libraries aren't provided yet out of the box. Here's the result: The above provides the WorldWind globe, together with all the standard options, e.g., for showing names and other WorldWind features, together with several features that I don't understand yet, such as tools for creating shapes and a recorder for replaying sequences. The complete application is like this, i.e., one single functionality module is provided, which exposes several API packages that can be extended: It would really be cool if the above module could also be added to a Maven-based application via a reference to a Maven repository, in the way that Timon Veenstra and the AgroSense team have made available their GeoViewer. One cool thing from the GeoViewer solution is the Flamingo menubar, which I added to Terramenta by simply putting the dependency below into the application POM: <dependency>    <groupId>nl.cloudfarming.client</groupId>    <artifactId>menu</artifactId>    <version>1.0.24</version></dependency> The result, without doing anything other than the above: I am looking forward to helping to document the use cases and developer scenarios for Terramenta! Something like this, created by Timon to demonstrate the GeoViewer use case would be cool to have: http://java.net/projects/agrosense/pages/ExampleGeoviewerNormal

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• CodePlex Daily Summary for Thursday, June 12, 2014

  CodePlex Daily Summary for Thursday, June 12, 2014Popular ReleasesLuna ORM - Data Layer Code Generator for Vb.Net and C#: Luna 4.14.6.7: Newer version, better LunaEngine with many new feature. Any class implements IDisposable.StackBuilder: StackBuilder 1.0.21.0: *Issue #9 : Take weight of case into account while searching optimal case... *Issue #10 : Changing direction of last layer to use remaining space while stacking a palette... *Issue #11 : New URL for AutoUpdater section in app.config... First working version of INTEX Corp Plugin...QuickMon: Version 3.15: This release expand on 'Presets' - now called Templates. A complete Template editor has been added so you can manage templates(edit, save, import and export). Existing agent configs can be saved as a template for reuse as well. Additionally a few other fixes were done as well. 1. Fixed Registry collector - allow 'blank' key value (<default> values) 2. Default Monitor pack history size is now 100 3. qmp file extension is now the defaultCommand Line Media Controller: v1.0.0.0: Initial ReleaseVidCoder: 1.5.23 Beta: Added first translations for 1.5. Includes new languages Portuguese, Japanese, Chinese Simplified and Czech. Many of these translations are still incomplete: you can help out on Crowdin. Added an option to pass through an input track if it matches the output codec. Updated HandBrake core to SVN 6209. Fixed crash on AAC passthrough. Fixed x264 settings getting set incorrectly when reverting from a preset with the Advanced tab. Fixed occasional crash when calculating remaining time. ...PowerShell App Deployment Toolkit: PowerShell App Deployment Toolkit v3.1.4: Added New-Folder and Remove-Folder functions (Thanks to SueH) Added NoWait parameter to Execute-Process Added the ability for Deploy-Application.exe to point to a different .ps1 file by specifying it on the command-line Added checks to Deploy-Application.exe to verify the AppDeployToolkit folder exists Added PSAppDeployToolkit icon to Deploy-Application.exe Fixed issue where hang could occur if file version was null when using Get-FileVersion Improved exception handling and loggin...CS-Script Source: Release v3.8.1: Improved ConfigConsole AdvancedShell extensions support cs-script.7z - CS-Script Suite (binaries, documentation, samples) cs-script.ExtensionPack.7z - CS-Script Extension Pack (additional binaries and samples) cs-scriptDocs.7z - CS-Script DocumentationProligence Orchard PowerShell: OrchardPs 0.2: Version 0.2, build 5273 Major Features: Support for Orchard 1.7 and 1.8 Support for managing Orchard themes Added new cmdlets: Get-OrchardFeature, Get-Tenant, Enable-Tenant, Disable-Tenant, Get-OrchardTheme, Enable-OrchardTheme Minor Features: Added 'gopc' alias for Get-OrchardPsCommand cmdlet Hidden 'Configuration' node in Orchard VFS, as it is not yet implemented Bug Fixes: Fixed signatures for *.ps1xml files 'FromAllTenants' switch no longer fails on tenants which are not running ...BugNET Issue Tracker: BugNET 1.6: Version 1.6 is a major upgrade to the latest frameworks and components by Microsoft. It includes a major UI overhaul using the bootstrap framework to have a modern, mobile friendly and easily customized layout. Upgrade to .NET 4.5 ASP.NET social auth Add script bundling and optimization Improvements for mobile devices Bootstrap (UI overhaul) Rewritten / friendly URL's Please read our release notes for BugNET 1.6: http://blog.bugnetproject.com/2014/06/08/bugnet-1-6-and-bugnet-pro-1...CppWindowsAPI: Library Build 20140608 [3.0]: There are many changes since the older versions before v3.0. Portable to the VS2013. Note that there is something still needed to implement so the relative components have been removed from this release, which will be re-implemented into the future releases. md5: 49bf91dbe4e47dee24d1f62a0b482334 sha-1: 4eabffc1b00557cdf8e83df18ac247e230f4c1d0 md5: 4a63a4923c23bcd821e7411453779086 sha-1: 1bb8549b92c8d791346cfe7efcdaeaa37098591d md5: 371026dfcac75e33f331430cf2c65415 sha-1: 7b8a155f30206f...SFDL.NET: SFDL.NET (2.2.9.3): Changelog: Retry Bugfix (Error Counter wurde nicht korrekt zurückgesetzt) Neue Einstellung: Retry Wartezeit ist nun EinstellbarLoad Runner - Distributed HTTP Pressure Test Tool: Load Runner 1.2: 1. added support for distributed load test (read documentation for details) 2. added detail documentationbabelua: 1.5.7.0: V1.5.7.0 - 2014.6.6Stability improvement: use "lua scripts folder" as lua search path when debugging;MyBB: MyBB 1.6.13 Türkçe Kurulum Paketi: MyBB 1.6.13 - Resmi Tam Türkçe UTF-8 Sifir Kurulum Paketi Rar Pass - Sifresi: mybb.com.tr Yayinci site: http://www.mybb.com.tr Orjinal indirme adresi: http://download.mybb.com.tr Destek 1: http://destek.mybb.com.tr/showthread.php?tid=12326 Destek 2: http://tr.mybbdepo.com/mybb-1-6-13-turkce-sifir-kurulum-paketi-konusu.html Dosya: MyBB1613KurulumPaketiTR.rar MD5: d2745b79aa8cc5f8cc09e8a91b50d3cc SHA-1: 6fbb8e611e6d78f8cd3d88d7a773edc67ecc2a3e Ekleyen: XpSerkan MCTR TEAM - Gururla Sunar.SEToolbox: SEToolbox 01.033.007 Release 1: Fixed breaking changes in Space Engineers in latest update. Installation of this version will replace older version.Virto Commerce Enterprise Open Source eCommerce Platform (asp.net mvc): Virto Commerce 1.10: Virto Commerce Community Edition version 1.10. To install the SDK package, please refer to SDK getting started documentation To configure source code package, please refer to Source code getting started documentation This release includes bug fixes and improvements (including Commerce Manager localization and https support). More details about this release can be found on our blog at http://blog.virtocommerce.com.Fantom - Expression Based Dynamic Language Manager: Fantom Binary and Test Web Site: The first version of FantomDLL. Download binary and sample site for testing.Back Up Your SharePoint: SPSBackUP 0.1: Supports SharePoint 2010 and 2013 All settings with xml input file Clean backup history Notifications by mail Log script results in rtf fileNPOI: NPOI 2.1: Assembly Version: 2.1.0 New Features a. XSSFSheet.CopySheet b. Excel2Html for XSSF c. insert picture in word 2007 d. Implement IfError function in formula engine Bug Fixes a. fix conditional formatting issue b. fix ctFont order issue c. fix vertical alignment issue in XSSF d. add IndexedColors to NPOI.SS.UserModel e. fix decimal point issue in non-English culture f. fix SetMargin issue in XSSF g.fix multiple images insert issue in XSSF h.fix rich text style missing issue in XSSF i. fix cell...Media Player (Technology Area): Media Player 0.3 (Codname Kalo): Themes are included, along with a picture viewer. This does not require 0.2 to be installedNew ProjectsAddress Auto lookup For MS CRM 2013: Address Lookup to find correct addresses in less time.Aspose for Spring.Java: Aspose for Spring Java provides source code and detailed usage instructions for extending the existing Spring.Java samples.Beatting Mole XNA Game on Windows Phone: The project game using XNA Game Engine in Windows PhoneBrecham.Obex: The library provides very broad OBEX support, providing not just the ‘Put’ operation , but also: Connect, Put, Get, SetPath, Delete, and Abort.Command Line Media Controller: This application provides a command line interface for issuing basic media controls to most media player applications.DevExpress Prism Adapters: DevExpress Prism Adapters is a project intented to provide different adapters for DevExpress controls integration with Microsoft Prism.FVSB: fvsbH Logger (8 logger): Create logs with a html format with a Visual Studio 2013 style.Masked Input For CRM 2013: Mask Input for more user friendliness and to avoid user typo errors.MovieDatabase: A movie database manipulation program that uses the movie database api.OpenNetworkTester: GUI-based bandwidth testing toolProgress Tracker: A simple pet project that allows users to set up daily tasks and track which ones they complete.ProjectShipping: summarySerXio: tfs, read tfs dataValu Akunting: Sistem Informasi Akuntansi Valudata KomputindoWindows Phone 8.1 Training for MIC15: Using for store training source code and resource url/files/.??????-??????【??】: ????????????????????,??????????,????????、????,??????????,??????????。??????-??????【??】: ??????????????????????????????,??????????,????,????,???,??????。??????-??????【??】: ????????????????,?????????????? 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??。????????、????、????、?????????? ???????。?????-?????【??】: ????????????????,???????????????。???????????,??????:????、????、???????！?????-?????【??】: ?????????????????,???????????,??????????????,??????????，??????????????！??????-??????【??】: ????????????,????,??????????? ???? ???? ?????????,???,??,?????!??????-??????【??】: ????????????????、????、????、??????、????、????????,????????、?????????,?????。????-????【??】: ????????????????:?????? ???? ??????,???????,??????,???????。?????-?????【??】: ????????????????,?????????????。????????????,???????,???????,?????,?????。?????-?????【??】: ?????????????????????????,???????????,????????,???????????????????????????-??????【??】: ???????????????????,?????????????,????,?????????,?????????????,?????,?????!??????-??????【??】: ?????????????????,???????????????。???????????,??????:????、????、???????！????-????【??】: ????????????????????????,????,????,??????????。???????????????,??,??,??????????,??????...?????-?????【??】: ?????????????????,???????????,??????????????,??????????，???????????????????-?????【??】: ?????????????????、?????、?????、????、?????,??????????。????????????????!??????-??????【??】: ????????????????????,????????????????,????????????????,??????！??????-??????【??】: ??????????????????????,????“???????,???????”?????,????????????！????-????【??】: ???????????????,??????????????、???????、???????、???????、?????！?????-?????【??】: ???????????????,????,????,??????,????“????、????、????、????”????????,??????.?????-?????【??】: ???????????????????,????????:??、??、???,?????????????????????!??????-??????【??】: ????????,??????:?????,?????,??????,??????????,????????。????????!??????-??????【??】: ???????????????????????:????、????、??????????????,????????。????????!??????-??????【??】: ?????????????????????????????,??????????,????,????,???,??????????-????【??】: ????????????????、????,??100%????,??????,????????????,???????????!????-????【??】: ??????????????????,??????????,????????、????,??????????,??????????。??????-??????【??】: ??????????????,????????,?????,???,???????????,???????????,?????,??????！??????-??????【??】: ??????????????????????????????????:???????,??????,????,????,????,?????！????-????【??】: ???????????????????，?????????/?,,???????????,??????????????!?????-?????【??】: ???????????????????????,????,????,????,???????,?????,?????.??????。?????-?????【??】: ???????????????、?????,????????????????????,????,????,??????。??????-??????【??】: ????????????????????,???????????????????????????,????:????,????,????,?????。?????-?????【??】: ???????????????????、????????、????????、????????、???????,????????????。?????-?????【??】: ????????????????,???????,??????。??????????,????,????,?????,????????????。???????-???????【??】: ??????????????????,??????,????,?????????????,????????,??????,????,?????...???????-???????【??】: ?????????????? , ???? ?????,??????????????,????,????,??????。?????-?????【??】: ???????????????????,??????????????,???????????,??????,????,??????,??????。??????-??????【??】: ????????????????,??????????????????????:???????,??????,????,????,????,????,????,???????！??????-??????【??】: ??????????????!???????????,??????,????,?????????????,????????,??????,????,?????...??????-??????【??】: ??????????????????、?????、?????、????、?????,??????????。????????????????!??????-??????【??】: ??????????????????????,????????,??????????,?????,????? ,????????!??????-??????【??】: ?????????????????,??????????、??????,??????????、????、????、???????。????-????【??】: ???????????、??????????????????,????????,?????,??????,????,????,????!?????-?????【??】: ?????????????????????,???????????????,???????,?????,?????,????? !!!?????-?????【??】: ?????????????????????,???????????????,????????????????????!???????-???????【??】: ????????????????????,??????????????????,?????????????。?????????,????????????。??????-??????【??】: ??????????????????,????,????,?????????.?????,?????!?????,?????????、??、??!??????-??????【??】: ???????????????????,?????????????,?????????????,??????,????,????,??????????！??????-??????【??】: ?????????????????,??????????、??????,??????????、????、????、???????。??????-??????【??】: ??????????????????????,???????????????,???????,?????,?????,????? !!!????-????【??】: ????????????????????,????????,??????????,?????,????? ,????????!?????-?????【??】: ?????????????????????,???????????????,????????????????????!?????-?????【??】: ?????????????????、????,??100%????,??????,????????????,???????????!??????-??????【??】: ??????????????????????????????,???????????????????????,???????。??????-??????【??】: ??????????????????:?????? ???? ??????,???????,??????,???????。????-????【??】: ????????????????、????、??????、????????,????????????,???????????！?????-?????【??】: ???????????,????,??????????? ???? ???? ?????????,???,??,?????!?????-?????【??】: ???????????????、????、????、??????、????、????????,????????、?????????,?????。??????-??????【??】: ?????????????:??????、????、????、????、????、??????、??????，???????!??????-??????【??】: ??????????????????,????,??.??.??.??.??.??.??.???，????，???????!????-????【??】: ??????????????，???????、???????????，????????、????、????、??????、????????。?????-?????【??】: ????????????????????????????，???????????????，????????、????、????、????、?????????，???????、???、???，??????????????????????，????????????、???????、??????????；???????????????-?????【??】: ???????????【.????.????.????.????.】??【??】:、??、??、??、??、??、??、??、??、??、??、???????????-??????【??】: ??????????????????、?????、?????、?????、?????、????,???????????,?????,??????！??????-??????【??】: ??????????????????,???、???!???????,????????????????,????????????,???!????-????【??】: ?????????????????????,????????????,?????、??、????,?????,???????????-?????【??】: ????????????????、????、????、??????????,???,?????,???????????????.?????-?????【??】: ????????????????????,?????????、??、??、????,??????????,?????????????！

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• Code &amp; Slides &ndash; SDE &ndash; What&rsquo;s new in Silverlight 4

  - by Timmy Kokke

  Last Tuesday the Software Developers Network – SDN organized another SDE. I’ve had the opportunity to present a session about Silverlight 4. I talked about lots of new features in Silverlight 4 and Expression Blend 4, focused on the Out-Of-Browser features.     The slides of my presentation can be downloaded here.   In my presentation I demonstrated a couple of features from my new pet project “SilverAmp”. This project is based on the legendary WinAmp, but made entirely in Silverlight. I use it to try out many new Silverlight 4 features. It’s not finished yet, but useful already. It runs outside the browser with elevated trust. It reads your local MyMusic folder and uses the TagLib library to read the ID3 tags of the mp3s it finds. SilverAmp is using MEF for extensibility. It uses a custom Window Chrome, designed in Expression Design. And it shows a notification window when a new song starts to play.   In the future it is going to get song information from Last.FM, will be able to show YouTube videos inside itself and it will tweet about what you are playing. The project will be fully documented to function as a reference implementation for the new Silverlight 4 features.   You can download the source on  http://SilverAmp.codeplex.com   Below are two screenshot of SilverAmp.                     If you have any questions, comments,  issues or feature requests let me know.

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• how to properly implement alpha blending in a complex 3d scene

  - by Gajet

  I know this question might sound a bit easy to answer but It's driving me crazy. There are too many possible situations that a good alpha blending mechanism should handle, and for each Algorithm I can think of there is something missing. these are the methods I've though about so far: first of I though about object sorting by depth, this one simply fails because Objects are not simple shapes, they might have curves and might loop inside each other. so I can't always tell which one is closer to camera. then I thought about sorting triangles but this one also might fail, thought I'm not sure how to implement it there is a rare case that might again cause problem, in which two triangle pass through each other. again no one can tell which one is nearer. the next thing was using depth buffer, at least the main reason we have depth buffer is because of the problems with sorting that I mentioned but now we get another problem. Since objects might be transparent, in a single pixel there might be more than one object visible. So for which Object should I store pixel depth? I then thought maybe I can only store the most front Object depth, and using that determine how should I blend next draw calls at that pixel. But again there was a problem, think about 2 semi transparent planes with a solid plane in middle of them. I was going to render the solid plane at the end, one can see the most distant plane. note that I was going to merge every two planes until there is only one color left for that pixel. Obviously I can use sorting methods too because of the same reasons I've explained above. Finally the only thing I imagine being able to work is to render all objects into different render targets and then sort those layers and display the final output. But this time I don't know how can I implement this algorithm.

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• Is this a ridiculous way to structure a DB schema, or am I completely missing something?

  - by Jim

  I have done a fair bit of work with relational databases, and think I understand the basic concepts of good schema design pretty well. I recently was tasked with taking over a project where the DB was designed by a highly-paid consultant. Please let me know if my gut intinct - "WTF??!?" - is warranted, or is this guy such a genius that he's operating out of my realm? DB in question is an in-house app used to enter requests from employees. Just looking at a small section of it, you have information on the users, and information on the request being made. I would design this like so: User table: UserID (primary Key, indexed, no dupes) FirstName LastName Department Request table RequestID (primary Key, indexed, no dupes) <...> various data fields containing request details UserID -- foreign key associated with User table Simple, right? Consultant designed it like this (with sample data): UsersTable UserID FirstName LastName 234 John Doe 516 Jane Doe 123 Foo Bar DepartmentsTable DepartmentID Name 1 Sales 2 HR 3 IT UserDepartmentTable UserDepartmentID UserID Department 1 234 2 2 516 2 3 123 1 RequestTable RequestID UserID <...> 1 516 blah 2 516 blah 3 234 blah The entire database is constructed like this, with every piece of data encapsulated in its own table, with numeric IDs linking everything together. Apparently the consultant had read about OLAP and wanted the 'speed of integer lookups' He also has a large number of stored procedures to cross reference all of these tables. Is this valid design for a small to mid-sized SQL DB? Thanks for comments/answers...

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• What determines which Javascript functions are blocking vs non-blocking?

  - by Sean

  I have been doing web-based Javascript (vanilla JS, jQuery, Backbone, etc.) for a few years now, and recently I've been doing some work with Node.js. It took me a while to get the hang of "non-blocking" programming, but I've now gotten used to using callbacks for IO operations and whatnot. I understand that Javascript is single-threaded by nature. I understand the concept of the Node "event queue". What I DON'T understand is what determines whether an individual javascript operation is "blocking" vs. "non-blocking". How do I know which operations I can depend on to produce an output synchronously for me to use in later code, and which ones I'll need to pass callbacks to so I can process the output after the initial operation has completed? Is there a list of Javascript functions somewhere that are asynchronous/non-blocking, and a list of ones that are synchronous/blocking? What is preventing my Javascript app from being one giant race condition? I know that operations that take a long time, like IO operations in Node and AJAX operations on the web, require them to be asynchronous and therefore use callbacks - but who is determining what qualifies as "a long time"? Is there some sort of trigger within these operations that removes them from the normal "event queue"? If not, what makes them different from simple operations like assigning values to variables or looping through arrays, which it seems we can depend on to finish in a synchronous manner? Perhaps I'm not even thinking of this correctly - hoping someone can set me straight. Thanks!

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• Too many heap subpools might break the upgrade

  - by Mike Dietrich

  Recently one of our new upcoming Oracle Database 11.2 reference customers did upgrade their production database - a huge EBS system - from Oracle 9.2.0.8 to Oracle Database 11.2.0.2. They've tested very well, we've optimized the upgrade process, the recompilation timings etc.  But once the live upgrade was done it did fail in the JAVA component piece with this error: begin if initjvmaux.startstep('CREATE_JAVA_SYSTEM') then * ORA-29553: classw in use: SYS.javax/mail/folder ORA-06512: at "SYS.INITJVMAUX", line 23 ORA-06512: at line 5 Support diagnosis was pretty quick - and refered to:Bug 10165223 - ORA-29553: class in use: sys.javax/mail/folder during database upgrade But how could this happen? Actually I don't know as we have used the same init.ora setup on test and production. The only difference: the prod system has more CPUs and RAM. Anyway, the bug names as workarounds to either decrease the SGA to less than 1GB or decrease the number of heap subpools to 1. Finally this query did help to diagnose the number of heap subpools: select count(distinct kghluidx) num_subpools from x$kghlu where kghlushrpool = 1; The result was 2 - so we did run the upgrade now with this parameter set: _kghdsidx_count=1 And finally it did work well. One sad thing:After the upgrade did fail Support did recommend to restore the whole database - which took an additional 3-4 hours. As the ORACLE SERVER component has been already upgraded successfully at the stage where the error did happen it would have been fine to go on with the manual upgrade and start catupgrd.sql script. It would have been detected that the ORACLE SERVER is upgraded already and just picked up the non-upgraded components. The good news:Finally I had one extra slide to add to our workshop presentation

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• The right way to add images to Monogame/Windows

  - by ashes999

  I'm starting out with MonoGame. For now, I'm only targeting Windows (desktop -- not Windows 8 specifically). I've used a couple of XNA products in the past (raw XNA, FlatRedBall, SilverSprite), so I may have a misunderstanding about how I should add images to my content. How do I add images to my project? Currently, I created a new Monogame project, added a folder called "Content," and added images under there; the only caveat is that I need to set the Copy to Output Directory action to one of the Copy ones. It seems strange, because my "raw" XNA project just last week had a Content project in it (XNA Framework Content Pipeline, according to VS2010), which compiled my images to XNB (I think). It seems like Monogame doesn't use the same content pipeline, but I'm not sure. Edit: My question is not about "how do I get the XNA content pipeline to work with Monogame." My question is "why would I want to use the XNA content pipeline in Monogame?" Because there are (at least) two solutions (that I see today): Add the images to the Monogame project and set the Copy to Output Directory options to copy. Add a XNA content pipeline project and add my images to that instead; reference it from my MOnogame project. Which solution should I use, and why? I currently have a working version with the first option.

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• Best design for a "Command Executer" class

  - by Justin984

  Sorry for the vague title, I couldn't think of a way to condense the question. I am building an application that will run as a background service and intermittently collect data about the system its running on. A second Android controller application will query the system over tcp/ip for statistics about the system. Currently, the background service has a tcp listener class that reads/writes bytes from a socket. When data is received, it raises an event to notify the service. The service takes the bytes, feeds them into a command parser to figure out what is being requested, and then passes the parsed command to a command executer class. When the service receives a "query statistics" command, it should return statistics over the tcp/ip connection. Currently, all of these classes are fully decoupled from each other. But in order for the command executer to return statistics, it will obviously need access to the socket somehow. For reasons I can't completely articulate, it feels wrong for the command executer to have a direct reference to the socket. I'm looking for strategies and/or design patterns I can use to return data over the socket while keeping the classes decoupled, if this is possible. Hopefully this makes sense, please let me know if I can include any info that would make the question easier to understand.

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• Query something and return the reason if nothing has been found

  - by Daniel Hilgarth

  Assume I have a Query - as in CQS that is supposed to return a single value. Let's assume that the case that no value is found is not exceptional, so no exception will be thrown in this case. Instead, null is returned. However, if no value has been found, I need to act according to the reason why no value has been found. Assuming that the Query knows the reason, how would I communicate it to the caller of the Query? A simple solution would be not return the value directly but a container object that contains the value and the reason: public class QueryResult { public TValue Value { get; private set; } public TReason ReasonForNoValue { get; private set; } } But that feels clumsy, because if a value is found, ReasonForNoValue makes no sense and if no value has been found, Value makes no sense. What other options do I have to communicate the reason? What do you think of one event per reason? For reference: This is going to be implemented in C#.

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• Is encoding needed in this decryption?

  - by Lijo

  I have a Encryption – Decryption scenario as shown below. //[Clear text ID string as input] -- [(ASCII GetByte) + Encoding] -- [Encrption as byte array] -- [Database column is in VarBinary] -- [Pass byte[] as VarBinary parameter to SP for comparison] //[ID stored as VarBinary in Database] -- [Read as byte array] -- [(Decrypt as byte array) + Encoding + (ASCII Get String)] -- Show as string in the UI My question is in the decryption scenario. After decryption I get a byte array. I am doing an encoding (IBM037) after that. Is it correct? Is there something wrong in the flow shown above? private static byte[] GetEncryptedID(string id) { Interface_Request input = new Interface_Request(); input.RequestText = Encodeto64(id); input.RequestType = Encryption; ProgramInterface inputRequest = new ProgramInterface(); inputRequest.Test_Trial_Request = input; using (KTestService operation = new KTestService()) { return ((operation.KTrialOperation(inputRequest)).Test_Trial_Response.ResponseText); } } private static string GetDecryptedID(byte[] id) { Interface_Request input = new Interface_Request(); input.RequestText = id; input.RequestType = Decryption; ProgramInterface request = new ProgramInterface(); request.Test_Trial_Request = input; using (KTestService operationD = new KTestService()) { ProgramInterface1 response = operationD.KI014Operation(request); byte[] decryptedValue = response.ICSF_AES_Response.ResponseText; Encoding sourceByteFormat = Encoding.GetEncoding("IBM037"); Encoding destinationByteFormat = Encoding.ASCII; //Convert from one byte format to other (IBM to ASCII) byte[] ibmEncodedBytes = Encoding.Convert(sourceByteFormat, destinationByteFormat,decryptedValue); return System.Text.ASCIIEncoding.ASCII.GetString(ibmEncodedBytes); } } private static byte[] EncodeTo64(string toEncode) { byte[] dataInBytes = System.Text.ASCIIEncoding.ASCII.GetBytes(toEncode); Encoding destinationByteFormat = Encoding.GetEncoding("IBM037"); Encoding sourceByteFormat = Encoding.ASCII; //Convert from one byte format to other (ASCII to IBM) byte[] asciiBytes = Encoding.Convert(sourceByteFormat, destinationByteFormat, dataInBytes); return asciiBytes; }

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• Strategy for versioning on a public repo

  - by biril

  Suppose I'm developing a (javascript) library which is hosted on a public repo (e.g. github). My aim in terms of how version numbers are assigned and incremented is to follow the guidelines of semantic versioning. Now, there's a number of files in my project which compose the actual lib and a number of files that 'support it', the latter being docs, a test suite, etc. My perspective this far has been that version numbers should only apply to the actual lib - not the project as a whole - since the lib alone is 'the unit' that defines the public API. However I'm not satisfied with this approach as, for example, a fix in the test suite constitutes an 'improvement' in my project, which will not be reflected in the version number (or the docs which contain a reference to it). On a more practical level, various tools, such as package managers, may (understandably) not play along with this strategy. For example, when trying to publish a change which is not reflected in the version number, npm publish fails with the suggestion "Bump the 'version' field set the --force flag, or npm unpublish". Am I doing it wrong?

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• Apply a BSU patch manually in Off-line Mode

  - by adejuanc

  To apply patch or patches in Off-line mode.Note that you will need at least the patch-catalog.xml and one patch jar file.BSU Patch Installation Off-line Mode------------------------------------------------------------------------------------------------------------Apply patch or patches in Off-line modeNote: To apply the patch in offline mode refer to the section 8 Using the Command-Line Interface of Using the Command-Line Interface guide availablehere - http://download.oracle.com/docs/cd/E14571_01/doc.1111/e14143/toc.htmSteps:1. Make sure you have the following files inside Folder WLS_ORACLE_HOME/utils/bsu/cache_dir- patch-catalog.xml- XXXX.jarNote that XXXX is the patch ID, is just a reference name.2. Apply the patch by running the following command:> cd WLS_ORACLE_HOME/utils/bsu/> ./bsu.sh -prod_dir=WLS_ORACLE_HOME/wlserver_10.3 -patchlist=<Patch_Id> -verbose -installFor example:> ./bsu.sh -prod_dir=/Oracle/Middleware/wlserver_10.3 -patchlist=XXXX -verbose -installAfter this the patch should be applied successfully.3. You can view the report of applied patches by running the following command:> ./bsu.sh -report -patch_id_mask=<Patch_Id>For example: > ./bsu.sh -report -patch_id_mask=XXXX4. Restart the server and watch the standard output logs to verify the installation.5. If you have more patches to apply go to step 1.6. Repeat the process on each Instance Server including the admin Server.

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