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• Silverlight Release History : Q2 2010 Beta (version 2010.1.0609)

  Q2 2010 Beta New Controls: RadTreeListView As you have probably already noticed we started a major new initiative for completely re-writing the TreeListView control. Our first attempt (back in 2009) proved that our users are mostly interested in a TreeListView control that is based on theGridView control rather then the TreeView. Therefore, we decided to completely rebuild the control and the result is that the TreeListView now combines the powerful data-driven features from RadGridView with the...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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• Working on the search

  The one thing I've always like working on and about this site, is the full text search engine and spider. Bascially it goes out and spiders all the major development blogs on the web, and then indexes them. The engine uses Lucene for it's index. Lucene is another open source project and it works really fast. Currently the directory is indexed, and the rss feeds are underway. We're talking about a lot of content, but once it's done you'll be able to pull podcasts, and videos as they get posted to...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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• Problem with keyboard and trackpad on ubuntu 12.04

  - by Cdub

  Have a really strange issue with my keyboard and trackpad after installing ubuntu 12.04. It picked up both fine with the livecd and in the install, but for quite awhile now, I find when I power my laptop up (Toshiba Satellite L775D-S7132), when I hit the login screen much of the time I won't have any keyboard or touchpad. I can plug in a usb mouse and then at least restart or shut the laptop down and then keep trying until it picks it up correctly, but it's really a pain to have to do that all the time. Are there quite a few bugs related to keyboard and trackpad issues with the new version? I really want to get this issue resolved as it's a major nuisance. Otherwise, my hardware gets picked up fine. Video, audio, wlan, usb work perfectly and I don't ever have any issues with them. What's the best way to figure out the problem? Thanks in advance, C.

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• What are the disadvantages of naming things alphabetically?

  - by JoJo

  Let me give you an example of how I name my classes alphabetically: Car CarHonda (subclass of Car) CarHondaAccord (subclass of CarHonda) There are two reasons why I put the type of the class earlier in its name: When browsing your files alphabetically in a file explorer, related items appear grouped together and parent classes appear above child classes. I can progressively refine auto-complete in my IDE. First I type the major type, then the secondary type, and so on without having to memorize what exactly I named the last part of the thing. My question is why do I hardly see any other programmers do this? They usually name things in reverse or some random order. Take the iOS SDK for example: UIViewController UITableViewController What are the disadvantages of my naming convention and the advantages of their convention?

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• Will URL encoding the image names

  - by TheGateKeeper

  Just wondering if it makes any difference to Google whether or not I URL encode the image names when linking to them. For example if I have an image named "test-1234-!.jpg", does it make a difference if I name it refer to it as "test-1234-%21.jpg"? The reason I am asking is because I am doing a major shift in the way my website works and while all new image names will not be URL encoded, all of the past ones are. I want to see if it is worth it renaming all of them or if I should just leave it like that.

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• How can I neatly embed Flash in a page in a way that is cross-browser compatible?

  - by Mark Hatton

  When I receive Flash objects from my designer, it comes with an example HTML page which includes both <object> tags and <embed> tags as well as a whole heap of JavaScript. If I copy and paste this code in to my webpage, it works, but the code looks a mess (and there is so much of it!). If I remove the extra code and try either just <embed> or <object> on their own, it works in some browsers, but not others. Is there a neat, minimal method that works in all the major browsers?

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• TELERIK UNVEILS STRATEGIC EXPANSION PLANS, LAUNCHES NEW PRODUCT DIVISIONS

  Corporate and product portfolio expansion solidifies current .NET market leadership, highlights growing momentum in end-to-end productivity solutions space Waltham, MA, April 13, 2010 Telerik, a leading provider of development tools and solutions for the Microsoft? .NET platform, today announced the expansion of its product portfolio to include team productivity solutions and automated testing tools. The company is focusing efforts around four distinct product divisions addressing major cross-sections...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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• Building Enterprise Smartphone App &ndash; Part 2: Platforms and Features

  - by Tim Murphy

  This is part 2 in a series of posts based on a talk I gave recently at the Chicago Information Technology Architects Group.  Feel free to leave feedback. In the previous post I discussed what reasons a company might have for creating a smartphone application.  In this installment I will cover some of history and state of the different platforms as well as features that can be leveraged for building enterprise smartphone applications. Platforms Before you start choosing a platform to develop your solutions on it is good to understand how we got here and what features you can leverage. History To my memory we owe all of this to a product called the Apple Newton that came out in 1987. It was the first PDA and back then I was much more of an Apple fan.  I was very impressed with this device even though it never really went anywhere.  The Palm Pilot by US Robotics was the next major advancement in PDA. It had a simple short hand window that allowed for quick stylus entry.. Later, Windows CE came out and started the broadening of the PDA market. After that it was the Palm and CE operating systems that started showing up on cell phones and for some time these were the two dominant operating systems that were distributed with devices from multiple hardware vendors. Current The iPhone was the first smartphone to take away the stylus and give us a multi-touch interface.  It was a revolution in usability and really changed the attractiveness of smartphones for the general public.  This brought us to the beginning of the current state of the market with the concept of an online store that makes it easy for customers to get new features and functionality on demand. With Android, Google made this more than a one horse race.  Not only did they come to compete, their low cost actually made them the leading OS.  Of course what made Android so attractive also is its major fault.  It is so open that it has been a target for malware which leaves consumers exposed.  Fortunately for Google though, most consumers aren’t aware of the threat that they are under. Although Microsoft had put out one of the first smart phone operating systems with CE it had to play catch up and finally came out with the Windows Phone.  They have gone for a market approach between those of iOS and Android.  They support multiple hardware vendors like Google, but they kept a certification process for applications that is similar to Apple.  They also created a user interface that was different enough to give it a clear separation from the other two platforms. The result of all this is hundreds of millions of smartphones being sold monthly across all three platforms giving us a wide range of choices and challenges when it comes to developing solutions. Features So what are the features that make these devices flexible enough be considered for use in the enterprise? The biggest advantage of today's devices is network connectivity.  The ability to access information from multiple sources at a moment’s notice is critical for businesses.  Add to that the ability to communicate over a variety of text, voice and video modes and we have a powerful starting point. Every smartphone has a cameras and they are not just useful for posting to Instagram. We are seeing more applications such as Bing vision that allow us to scan just about any printed code or text to find information.  These capabilities have been made available to developers in the form of standard libraries for reading barcodes of just about an flavor and optical character recognition (OCR) interpretation. Bluetooth give us the ability to communicate with multiple devices. Whether these are headsets, keyboard or printers the wireless communication capabilities are just starting to evolve.  The more these wireless communication protocols grow, the more opportunities we will see to transfer data between users and a variety of devices. Local storage of information that can be called up even when the device cannot reach the network is the other big capability.  This give users the ability to work offline as well and transmit information when connections are restored. These are the tools that we have to work with to build applications that can be leveraged to gain a competitive advantage for companies that implement them. Coming Up In the third installment I will cover key concerns that you face when building enterprise smartphone apps. del.icio.us Tags: smartphones,enterprise smartphone Apps,architecture,iOS,Android,Windows Phone

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• Is 1GB + 1GB RAM better than 2GB +0.5GB?

  - by pibboater

  My laptop has two slots for RAM, and currently has two 512 MB chips, for 1 GB. Windows XP is running terribly slow on it, so I want to upgrade the RAM. I could buy two 1 GB chips to replace both of the current 512 MB chips, to give me 2 GB of RAM. Or, the price is the same to buy one 2 GB chip, to replace just one of the 512 MB chips, and give me 2.5 GB total. The RAM it takes is PC2-4200 533MHz DDR2. What do you think would be better: buying two 1 GB chips so it can take advantage of dual-channel operation, or buying one 2 GB chip to end up with more total RAM but not dual-channel operation? Like I said, price is the same, so performance is the only consideration. I'm not doing anything especially intensive like video or photo editing -- just having multiple Office programs open, playing music, browsers, etc., but currently even opening the first application takes forever. If it matters, the laptop is a Toshiba Qosmio G25-AV513 running Windows XP Media Center SP3. Thanks! Kevin

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• Best database setup for one click games

  - by ewizard

  I am building a one click game website/mobile app, and I am debating between using MySQL and MongoDB for the backend. The way I have been exploring it is with a NodeJS/Express/Angular/Passport/MongoDB stack - I have also implemented Socket.io. I have gotten to the point where I am sending data from the flash game to the server (NodeJS). The only data that needs to be sent is basic user information, the players score at the end of each game, and some x,y positions for each players game (for anti-cheating). It seems like MySQL would work fine, but as I am already using MongoDB - are there any major drawbacks to continuing to work with MongoDB on this project?

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• Will the Global Demand for Water Outstrip the Supply by 2030?

  - by Evelyn Neumayr

  A recent study conducted by the Economist Intelligence Unit and sponsored by Oracle Utilities, titled “Water for All?”,considers the preparedness of utilities to supply water to the current global population of over 7 billion people, with a further 1 billion expected by 2030. It compares strategies used by utilities in 10 major countries to address this challenge. This study’s findings show that wide-ranging water management efforts and large-scale investments must be made if utilities are to meet near-certain water stress—demand outstripping supply—by 2030. The report is based on an online survey of 244 executives of water utilities in these countries, supplemented by in-depth interviews with 20 water utility executives and independent experts. The research concludes that utilities worldwide expect to meet future demand, despite increased supply pressure on supplies, due to improvements in water productivity that the wide range of measures utilities and governments will take to ensure that water is used more efficiently. Read more about this here.

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• How Effective Websites Are

  It's normal for just about any business or enterprise to have an online business, as well as offices and a shop front. In today's world where individuals increasingly browse the world wide web first for info, it becomes important to take care of and enhance that online presence, as it actually could make or break the traffic to an online site or even the office door. Hiring an SEO agency or guide may seem like a major decision, but the quicker you come to a decision to go for it, the better, especially if you are about to change your present website design or intending to start a fresh one.

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• How to xkill an application by its id?

  - by Hanynowsky

  I need to simulate the behavior of the keyboard shortcut (ALT+F4) using Terminal for a given application. If I open for example gedit and click ALT + F4 , then GEDIT will be xkilled. If I want to achieve same thing using Terminal, how should I proceed? The command export PIDTOKILL=pidof gedit | grep [^*]; xkill -id $PIDTOKILL does not work and gives the following error: xkill: killing creator of resource 0x3f38 X Error of failed request: BadValue (integer parameter out of range for operation) Major opcode of failed request: 113 (X_KillClient) Value in failed request: 0x3f38 Serial number of failed request: 8 Current serial number in output stream: 9 I think I am confusing application id and process id here

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• Bandwidth heavy site... use co-location?

  - by darron

  I'm working on a web site that is likely to be very bandwidth-heavy. A major feature of the site when in active use can pull up to 1Mbps for a single session. Luckily, once users get over the new toy factor, the use of this feature will probably be 1-5% or less (probably much less) of session time. However, new users are likely to play with this feature a good bit, especially at launch. I'm very concerned about bandwidth use. This is more or less a niche market, so I won't ever be needing to scale to crazy levels like YouTube. However, it is entirely possible for it to be a couple terabytes/month. Is co-location my best option? What cheap bandwidth services (colocation/hosted/cloud/whatever) are out there?

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• How to safely and painlessly switch from Kubuntu to Lubuntu?

  - by cdshines

  I've had Kubuntu installed for several years, updating from one major release to another, and now I think I'd like to try to switch to Lubuntu. But since my distribution is already tuned and shaped to satisfy my needs, I'd like not to get a fresh installation, but just purge kubuntu-desktop and install lubuntu-desktop. But when I execute sudo apt-get install lubuntu-desktop, it gives me an error of the following essence: The following packages have unmet dependencies: lubuntu-desktop : Depends: usb-modeswitch but it is not going to be installed E: Unable to correct problems, you have held broken packages. So, I investigate the modeswitch problem and get The following packages have unmet dependencies: usb-modeswitch : Depends: usb-modeswitch-data (>= 20110227-1~) but it is not going to be installed E: Unable to correct problems, you have held broken packages. But: Reading state information... Done usb-modeswitch-data is already the newest version. So, my question is: what actions should I take in order to obtain a clean and fresh installation of Lubuntu? And also, how do I safely remove all the kubuntu-desktop-related stuff?

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• Reader Poll: Are You Switching to Internet Explorer 9?

  - by Jason Fitzpatrick

  The recent release of Internet Explorer 9 polished up the IE line with a new interface, hardware acceleration, and more. Is enough to convince you to switch? Yesterday we gave you a full run down of the Internet Explorer 9 release and highlighted the major improvements including: a totally new interface that’s even more streamlined than that of Google Chrome, direct access to your video card for super fast acceleration, customizable menus for pinned sites, HTML 5 support, and a combined address and search bar, among other improvements. Is it enough to sway you? Cast your vote in the poll below and then sound off in the comments. How-To Geek Polls require Javascript. Please Click Here to View the Poll. How to Create an Easy Pixel Art Avatar in Photoshop or GIMPInternet Explorer 9 Released: Here’s What You Need To KnowHTG Explains: How Does Email Work?

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• 3rd Annual South Florida SQL Saturday - August 13th!

  - by ScottKlein

  The 3rd annual South Florida SQL Saturday event will be help August 13th, 2011 at Nova Southeastern University in Davie, FL. This is a change in venue from last year as DeVry is in the middle of a major remodling project. We has almost 450 last year, and we expect to have over 500 this year with great speakers such as Andy Warren, Herve Roggero, and more! As always, we our goal is to feed you well, so we are shooting for some hot lunch food this year. We are working on that now and will update you as soon as we firm it up. One of the things we will be trying this year is 90-100 minute sessions on a couple of tracks. We strongly feel that several topics are just getting warmed up in 45 minutes, so we are going to experiment with 90-100 minute sessions on some of the BI topics. We would love to see you there!

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• I'm working on my resume for a job fair this week; any tips? [closed]

  - by buu700

  This will change as I update the document, but here is my resume. The job fair I'm going to is really huge (very good chance that it will determine where I intern this summer), so I would definitely appreciate any possible assistance in polishing this up. Any advice possible will be appreciated, ranging from spacing or absurdly minor formatting issues, to rearranging bullet points, to browser incompatibilities, to major changes in anything I've organised or written. At the moment, my only specific question is whether easter eggs are acceptable (specifically, if representatives who understand the reference will generally frown upon my inclusion of "Hacked The Gibson", given the context). Also, if anyone wants to evaluate it (e.g. font size, final arrangement, etc.), here is a PDF snapshot of the document at the time this question was submitted (the final version will have a different file name and appropriate metadata, for the record). Thanks!

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• Developer Deep Dive into Oracle WebLogic Server 12c (Dec. 1)

  - by oracletechnet

  It is not often that we are compelled to direct you toward a product launch event. But this one is special. On Dec. 1, Oracle will launch (via live Webcast) Oracle WebLogic Server 12c, a major update to that product. And this release, which includes Java EE 6 support, Active GridLink for Oracle RAC, and Oracle Virtual Assembly Builder, among other things, is specifically designed to improve the process of deploying apps to the cloud. Even better: the Dec. 1 Webcast includes an hour-long, developer-focused deep-dive session in which product experts will answer your questions via live chat. (Register for this session separately.) You don't want to miss this one, folks! 

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• Using a Higher Precision (than 8-bit unsigned integer) Buffered Image for Heightmaps in Java

  - by pl12

  I am generating a heightmap for every quad in my quadtree in openCL. The way I was creating the image is as follows: DataBufferInt dataBuffer = (DataBufferInt)img.getRaster().getDataBuffer(); int data[] = dataBuffer.getData(); //img is a bufferedimage inputImageMem = CL.clCreateImage2D( context, CL_MEM_READ_WRITE | CL_MEM_USE_HOST_PTR, new cl_image_format[]{imageFormat}, size, size, size * Sizeof.cl_uint, Pointer.to(data), null); This works ok but the major issue is that as the quads get smaller and smaller the 8-bit format of the buffered image starts to cause intolerable "stepping" issues as seen below: I was wondering if there was an alternate way I could go about doing this? Thanks for the time.

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• Java Certification Programs in India

  - by user2948246

  I am a current Masters student studying in the USA. My major is Computer Science. I did not get any summer internship and thus wanted to update my resume. I decided to come to india to do some courses. I want to know if a Java certification program from NIIT or APTECH holds any weightage in the US when i apply for my full time. I also plan on taking up a course on Hadoop and learn a couple of languages on my own.

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• Best choice for 3D Physics Engine for C#/XNA

  - by Nic Foster

  Since 2007 I've been working on the development of an open-source game engine, and have been using JigLibX for 3D Physics. However, the developers on the project have stopped contributing to it for over 2 years now, and it's lacking features I need, or have major bugs in certain features. What are some good choices for 3D physics engines that are written purely in C#? Are there any that are more complete than JigLibX? EDIT: I just stumbled upon an engine called BEPUphysics. It was supported up until May 2012, which is fairly recent. I may check it out, any information that you guys could give on how complete the engine is would be great.

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• DIY Touch Screen Mod Makes Regular Gloves Smartphone-friendly

  - by Jason Fitzpatrick

  Smartphone-friendly winter gloves are expensive (and often ugly). Skip shelling out for store-bought gloves when, armed with a needle and thread, you can turn any gloves into smartphone-friendly ones. Over at Popular Science, Taylor Kubota shares the simple trick: 1. Order silver-plated nylon thread (silver conducts electricity). This can be difficult to find in stores, but major online retailers carry it. 2. Pick a pair of gloves to modify. Although leather works, it’s harder to push a needle through. 3. Stitch the figure of a star or other solid shape onto the glove’s index finger with the thread, making sure it will contact both the touchscreen and your skin. Our Geek Trivia App for Windows 8 is Now Available Everywhere How To Boot Your Android Phone or Tablet Into Safe Mode HTG Explains: Does Your Android Phone Need an Antivirus?

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• Finding the displacment of a robot [closed]

  - by Jordan Brown

  I'm building a quadruped (4 legs 3 DOF) for my major work in electronics at high school. I need to know the displacement of the robot and I can't use an encoding wheel. I've done my research and I found a system where I use an accelerometer, gyroscope and a magnetometer to determine the displacement but I'm not sure how to code it. I'm using Arduino and will use compatible sensors. I would like to be able to implement something similar to this video which demonstrates the principles evaluated in this paper. I don't need to map the data on a screen, just be able to read its displacement from its last recorded position. EG. (Read Position) --- (Do "stuff") --- (Read Position) --- (Calculate displacement caused by "stuff")

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• How can I really master a programming language?

  - by cprogcr

  I know that learning a language, you can simply buy a book, follow the examples, and whenever possible try the exercises. But what I'm really looking is how to master the language once you've learned it. Now I know that experience is one major factor, but what about learning the internals of the language, what is the underlying structure, etc. There are articles out there saying read this book, read that book, make this game and that game. But to me this doesn't mean to master a language. I want to be able to read other people's code and understand it, no matter how hard that is. To understand when to use a function and when another, etc etc. The list could go on and on but I believe I've made the point. :) And finally, take whatever language as an example if needed, though best would be if C was taken as an example.

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