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• 10th Annual JCP Award Winners Announced

  - by heathervc

  The 10th JCP Annual Awards were presented in three categories yesterday evening at the JCP Party during JavaOne.  Congratulations to the winners and the nominees for the contributions to the Java Community! JCP Member/Participant of the Year London Java Community and SouJava For their historic contribution to the Adopt a JSR program and supporting Java developers through the JCP. Outstanding Spec Lead Victor Grazi, Credit Suisse, (JSR 354, Money and Currency API) For his dedicated, focused expertise in solving issues representing Money and Currencies. Most Significant JSR JSR 348, JSR 355 and JSR 358, JCP.Next, These three JSRs will set the direction and procedures for the next-generation JCP. You can view profiles of all the nominees on jcp.org.

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• How do you usually manage callbacks in Java using Swing library?

  - by none

  I'm quite new to the Java Swing programming, and GUI development as well. As a beginner, I'm currently reading Design Pattern, but finding what I'm looking for is quite hard, most of the times. So far, I've never had huge problems defining a view hierarchy - I just use to subclass component from component. But the hard-to-do here is how managing callbacks, which often become hard to maintain due to the hard code. During my last projects, I tried to separate GUI, Listener and Callbacker objects which cooperated together, but in this way it was really hard adding new features. So, which kind of best patterns or best practices do you tend to use when trying to maintain, add new features or even worst avoid to hard-code classes which manage callbacks method in this kind of frameworks (mainly Java Swing)?

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• Bluetooth no longer working?

  - by user68733

  I am using a Toshiba Portege A600 and have been using Ubuntu for about a year now. When I first installed Ubuntu "10.10", everything worked fine, including bluetooth. I was able to send and receive files. After upgrading to 11.04 and then to 11.10, bluetooth functionality decreased. I was able to view bluetooth devices, but not be able to pair or connect to them. Now, on 12.04, bluetooth is no longer recognised at all. When I open up the Bluetooth settings application, it says "No Bluetooth Adapters found". What is the cause of this, and how can I fix it. I have included the output of sudo lshw. http://pastebin.com/09w0vkfu Thanks!

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• Get/Post Controller Logic Best Practice

  - by Brian Mains

  In an ASP.NET MVC project (Razor), I have a Get request, which loads two properties on a model, dependent on the property passed into the action method. So if the parameter has a value, the Group property is supplied data. But if not, the Groups collection property is supplied data. In the post action method, when I process the data, to repopulate the view, I have to provide similar logic, and could getaway with returning Action(param) (the get response) to the caller. My question is, based on experience, is that a good practice to get into? I see some downsides to doing that, but adds the lack of code redundancy. Or is there a better alternative?

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• MVC Design Pattern to Combine Multiple Models for use

  - by roverred

  In my design, I have multiple models and each model has a controller. I need to use all the models to process some operation. Most examples I see are pretty simple with 1 view, 1 controller, and 1 model. How would you get all these models together? Only ways I can think of are 1) Have a top-level controller which has a reference to every controller. Those controllers will have a getter/setter function for their model. Does this violate MVC because every controller should have a model? 2) Have an Intermediate class to combine every model into a one model. Then you create a controller for that new super model. Do you know of any better ideas? Thanks.

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• Technical Article: Experimenting with Java Timers

  - by Tori Wieldt

  OTN's new tech article is "Experimenting with Java Timers" by T. Lamine Ba. This article studies time—how Java handles timers and the scheduling of tasks. Java timers are utilities that let you execute threads or tasks at a predetermined future time, and these tasks can be repeated according to a set frequency. The article starts with a simple "Hello World" program in a web application that's composed of JavaServer Pages (JSP) and uses the model-control-view (MVC) design pattern. The IDE used in this article is NetBeans IDE 7.1, but you can use any IDE that supports Java. "Experimenting with Java Timers" demonstrates how to get started scheduling jobs with Java. To learn about Swing timers, check out the Java tutorial "How to Use Swing Timers" and additional information in the Java Platform, Standard Edition 7 API Specification for Class Timer. 

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• Does an inventory limit in an MMORPG make sense?

  - by Philipp

  I am currently developing a simple 2d MMORPG. My current focus is the inventory system. I am currently wondering if I should implement a limit on what a player character can carry. Either in form of a maximum weight, a limited number of inventory slots, or a combination of both. Almost every MMORPG I ever played limits inventory space. But plausibility aside, is this really necessary from a gameplay point of view? Maybe it would in fact improve the game experience when I just let the players carry as much stuff as they want. tl;dr: What is the game development rationale behind limiting carrying capacity of player characters?

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• How do I access an external hard drive plugged into my router?

  - by Shawn

  I am running Ubuntu 11.10 and I own a Netgear N600 Wireless Dual Band Router with a USB port built into it. Naturally, the router came with instructions on how to mount and view this drive with both Windows and Mac, but nothing about Linux. I have an WD Elements 1 TB external HDD that I would like to plug into the router and share across my home network. However, when I plug it in, absolutely nothing happens on my desktop. I checked on two different machines and nothing seems to indicate that the drive has been mounted (or is even seen at all) on either machine. I am fully aware that it may not be possible to do this with a Linux system, but I was hoping someone might have a suggestion. Thanks!

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• Universal Work Queue Quick Filter Examples

  - by LuciaC-Oracle

  If you use Universal Work Queue then it's likely that you will want to define and use your own Quick Filters.  Quick Filters allow you to focus on specific work classes based on assigned criteria in a node. This makes it much easier for Agents to view their work grouped in a meaningful way.How to create Universal Work Queue - Quick Filters (Doc ID 803163.1) gives two worked examples to help you understand how to create your own Quick Filters:     Adding a 'Resource Group' filter     Adding an Overdue Amounts filter for use in Collections. We hope you find these examples useful.  Let us know by providing feedback on the document itself or, why not post to the MOS Service Community with your experience and suggestions.

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• Creating an OpenGL FPS camera: I have the position and orientation vectors, now what?

  - by Synthetix

  I have been struggling to create a first person camera in OpenGL ES 2.0 without using gluLookAt(). I grab the camera's orientation vectors (the way it's looking) from the current modelview matrix, and use that to calculate the new forward/backward (Z) translation value. I then calculate the strafe (X) value from the dot product of Z and Y (which is always 1.0). So, I have all the information I need to create a view matrix, but how do I do that without using gluLookAt? Almost all the examples I've seen use gluLookAt, but no such function exists in OpenGL ES 2.0. Besides, one of the moderators on cprogramming.com mentioned that gluLookAt is not appropriate for FPS cameras: http://cboard.cprogramming.com/game-programming/135390-how-properly-move-strafe-yaw-pitch-camera-opengl-glut-using-glulookat.html I am really confused by all the conflicting information I'm getting. I just want to create a first person camera that goes forward (W,S keys), side-to-side (A,D keys) and rotates around its center (Y axis only), Wolfenstein style. Any help on this would be much appreciated!

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• Why Can't Computers Off My Network See the Site? [migrated]

  - by nmagerko

  Have just set up Apache, PHP, MySQL, etc. on my Ubuntu OS, and I was wondering why computers that are not on my network can not see the basic index.html that Apache uses as the default. I set up the static ip address for my computer, and I use 192.168.1.100 for computers to view the simple site. Is there something I am missing that will allow others to access my site? (It is REALLY simple; no graphics, CSS, etc.)

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• Is it correct to add booleans in order to count the number of true values in a vector?

  - by gerrit

  Is it conceptually correct to sum a vector of booleans? From a mathematical point of view, I would argue it's not: True + True != 2. But it's quite practical to do so still! Example using the vectorised Python library numpy: In [1]: X = rand(10) In [2]: large = X>0.6 In [3]: large.dtype Out[3]: dtype('bool') In [4]: large.sum() Out[4]: 7 I don't like it, but it's very practical. Is this a good practice? Update: the aim is to count the number of true values in a vector.

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• How to draw a texture to a MS Terrain object - Farseer

  - by Brad

  I'm using Farseer to make a game in XNA and I can't seem to figure this out. I've decided to use MSTerrain for making my game's terrain because I wanted destructible terrain and MSTerrain seemed like the best bet. Unfortunately, I'm stumped on how to actually show the terrain. When I generate the terrain it's visible in debug view, but MSTerrain does not have a Draw method, so I'm wondering how it is supposed to be drawn to the screen? Is it worth pursuing? I'm starting to think that MSTerrain is more trouble than it's worth, is there another better way to do this with bodies? I appreciate any help you can give. Thanks.

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• Where, in an object oriented system should you, if at all, choose (C-style) structs over classes?

  - by Anto

  C and most likely many other languages provide a struct keyword for creating structures (or something in a similar fashion). These are (at least in C), from a simplified point of view like classes, but without polymorphism, inheritance, methods, and so on. Think of an object-oriented (or multi paradigm) language with C-style structs. Where would you choose them over classes? Now, I don't believe they are to be used with OOP as classes seem to replace their purposes, but I wonder if there are situations where they could be preferred over classes in otherwise object-oriented programs and in what kind of situations. Are there such situations?

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• Are session aware Models a bad thing?

  - by kevtufc

  I'm thinking specifically in Rails here, but I suspect this is a wider question. In a Rails web application I'm using data from the session in models in order that the models know who is logged in. I use this in a method which filters out some data from the database depending on a very simple permissions system. The thing is: using sessions in models in Rails requires a bit of a workaround. It works, but I've a feeling that it's something that I shouldn't be doing and I'm worried there's a big gotcha I'm missing. I suppose the Right Thing To Do would be to return all the data and filter out the not-wanted bits in the controller before passing that to the view, but doing it in the model seems to avoid quite a bit of code duplication and so feels "cleaner." Can anyone tell me why or shouldn't do this? Or that it's not a problem?

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• How can I make these Google Analytics numbers add up? (Frequency & Recency)

  - by Joe

  Here's a screen shot from Google Analytics. It's my last months traffic, and this is the 'Frequency & Recency' tab. So I believe that if I add up all the numbers under 'visits' I get 11,432, which is right, and if I add up all the numbers under 'pageviews' I get 14,785 and that's right as well. But, let's take the last line - the last line appears to say that 71 people, visited more than 51 times each, and they viewed a total of 243 pages between them - that doesn't seam to make any sense - did they view 9% of a page each time? So that's clearly wrong - what's the error in my calculation?

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• How can I run a complete application from RAM?

  - by pico

  When I do some stuff in background (unpacking, compiling, backup, etc.) my hdd is under load and for example, Firefox and Chromium take very long to start and react very slow. While my hdd is under load I have still plenty of free RAM and free CPU. How can I copy the whole Firefox or Chromium including all dependencies into RAM? I don't care about persistence, I just want to view some websites, videos, etc. There are instructions putting the cache into /dev/shm, but that didn't speed up so much. Getting the profile into the RAM drive might also be easy... But how to get the binaries with all dependencies into RAM?

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• Event Aggregator.. not getting a response, how to determine completion?

  - by Duncan_m

  I'm rewriting a vehicle tracking application, a google maps based thing.. The users are able to search for a vehicle by typing a few characters of the vehicles "callsign". My application is based around a sort of "event bus" within Backbone.. when a search occurs I send a message on the bus saying something like "does anyone match this?".. If a marker matches the search term it responds with a sort of "yes, I match!".. My challenge arises when no-one matches, I get no response.. it feels a little hacky to "wait a little while" and check if a response has been recieved.. The application is based around Backbone.js and using the Event Aggregator pattern described in the answer to this question on Stack Overflow: http://stackoverflow.com/questions/7708195/access-function-in-one-view-from-another-in-backbone-js Is there a well defined design pattern that might assist me here? Sending a request for a response and not getting any responses?

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• What advantages are conferred by using server-side page rendering?

  - by user1303881

  I am developing a web app and I have currently written the entire website in html/js/css and on the backend I have servlets that host some RESTFUL services. All the presentation logic is done through getting json objects and modifying the view through javascript. The application is essentially a search engine, but it will have user accounts with different roles. I've been researching some frameworks such as Play and Spring. I'm fairly new to web development, so I was wondering what advantages using server side page rendering would provide? Is it: Speed? Easier development and workflow? Access to existing libraries? More? All of the above?

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• External hard drive failing, is backup recovery possible?

  - by backitup

  I have a Seagate Freeagent external hard drive. While I was backing it up on Windows XP my pc crashed and I received the horrifying "Delayed Write Error" when I rebooted citing "$MFT" and a few other files. I tried to unmount it, but to no avail. Now my pc just crashes when I try to access it via Windows. In Ubuntu I am able to view it through disk utility. SMART status is "DISK FAILURE IMMINENT". Fdisk doesn't work, and the SMART tests fail on "Reallocated Sector Count". Is there any way for me to rescue any of my data. I can still access the drive but as soon as I do that it crashes.

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• Centralizing Chart of Accounts Management Across Oracle ERP and EPM Applications with Oracle Hyperion Data Relationship Management

  Most enterprises today have multiple GL/ERP systems - each with their own set of accounts, structures and systems for financial and management reporting. Mergers, acquisitions and reorganizations inject constant change into the process - through new accounts, entities, and locations. Accommodating an organization's unique view of the business while still maintaining accurate collection, measurement and reporting at the corporate level makes synchronization of chart of accounts across multiple systems a challenge. In this podcast, you'll hear about how Oracle Hyperion Data Relationship Management allows you centralize and align different financial perspectives into your corporate reporting standards. This end-user oriented, technology agnostic hierarchy management solution enables organizations to coordinate the management of chart of accounts across the enterprise and save a significant amount of time and effort.

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• How to make search engine to showing my location map? [duplicate]

  - by Lena Queen

  This question already has an answer here: What are the most important things I need to do to encourage Google Sitelinks? 5 answers I have a webpage that already listing on google maps. If i search with term "my web", search engine (google) only show my web. How to make search engine (google) show my web and google location on right as this scenario: For contact and portfolio page, how to make it so user can view some of my page beside my home page? Also, how to make google show my other links of my web?

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• Separating Db from business with Inherited classes using multiple views

  - by catalinux

  I have a software that has a car model that will be used in different views (listing, ads, detail page, carousel, up sell widget,etc). class CarModel extends DbModel{ } I look for a "nice way" (a combination of flexible, easy to maintain,etc) to have this used in views. I'm thinking at two different ways Having object views for each context CarViewBase{ var car;// of type CarModel function constructor(args){ //will instantienta internal variable car based on args } function getThumb(){ } function getTitle(){ } } CarListingView extends CarViewBase{ function getListing(){ } } CarAdsView extends CarViewBase{ //the busines rule changes for ads widget function getThumb(){ } } Extending directly the CarModel The challenges comes when My Car Model might need an abstract factory. Let's say I have a field on my car object that states the type of the car : a truck, or a bike, or van. How would affect that my object view? Let's say that getTitle() rule would be different for each type of it. How would you do it?

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• SmartSync Printing In ASP.NET Scheduler Reporting v2010.1

  Check out this new SmartSync printing feature of the ASPxScheduler that helps you to print a scheduler report in a Tri-fold style. Hows It Work? If several scheduler report controls are placed on the same report, the scheduler adapter on the report coordinates how the controls will iterate through the schedule data. The view control on the report that has the smallest period becomes the 'principal' or 'driving' control. It starts the iteration, and other controls on the page are...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• SSRS Reports as a Data Source in Excel 2013

  DBAs are expected to know how to administer the technologies that are available with and peripheral to SQL Server. To properly administer them, it certainly helps to understand the technology from the point of view of the user. By using an existing SSRS report as a data feed for Excel, Rodney Landrum explains how these users can now take advantage of development efforts in new ways. The seven tools in the SQL DBA Bundle support your core SQL Server database administration tasks.Make backups a breeze! Enjoy trouble-free troubleshooting! Make the most of monitoring! Download a free trial now.

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