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• Beginning android games, 2nd edition engine

  - by Benjamin Stephen

  I recently bought the book from Apress and have worked my way through it, unfortunately, it seems to just be dealing with side scrolling games and not Zelda-like top down games. I was wondering if anyone out there can tell me if it's possible to use their engine to create such a game? It doesn't go into how to build a top down tile map. Using the engine in their book, how can I make a tile map easily that has walls and things like that? Any help would be appreciated. Thanks in advance.

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• Software developer needs Validation for VA Chap 31 to purchase Macbook Pro vs. PC [closed]

  - by David

  I am currently attending college with a path of software development and working towards my BS thanks to VA Chap 31. My old original Macbook Pro is near dead and no longer upgradable on the software or hardware side. The VA has offered to purchase a PC laptop for me (Because my syllabi says computer required), but I do not want to go backwards. I have a lot invested in OS X software and Mac peripherals, not to mention I prefer to program in an Apple environment. PC vs. Mac costs are so drastically different that I must validate my request for a new Macbook Pro. In my request to the VA, I stated the above and some other topics but they requested more validation. Can anyone recommend issues, reasons, etc. to help me validate this purchase by the VA for school? Thanks in advance for your help, David

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• documentation of typescript code

  - by Max Beikirch

  my question is rather short: How do I document typescript code properly? I found out that for projects becoming bigger and bigger, it is important to look at a function and immediately know parameters, what it returns and side-effects etc. It is tiring to have just a bunch of comments before a function, most of the time these 'blocks' even look differently in style. What I am looking for is a documentation tool like javadoc or doxygen for typescript. Is there anything out there? Or is it possible to 'abuse' a documentation tool and get it to work with typescript?

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• ASP.NET 3.5 Functions and Subroutines

  The most basic of all ASP.NET 3.5 server side scripts that I ve covered using the Visual Basic programming language is not modular in nature. This means that an ASP.NET 3.5 server will interpret the scripts in the Visual Basic file e.g Default.aspx.vb from top to bottom. In most real-world applications that use Visual Basic in ASP.NET websites however most web developers structure their programs in modules. This article will give you information about subroutines and functions along with practical examples and their advantages.... Cloud Servers in Demand - GoGrid Start Small and Grow with Your Business. $0.10/hour

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• Remove Duplicate Second Unity Launcher on Dual Screen

  - by Eugene van der Merwe

  See attached image. On my dual screen display I have a Unity Launcher on the left hand screen and also on the right hand screen. Both work perfectly fine. I don't want two Unity Launchers. Every time I move my house to the right hand side it gets slowed down over the right launcher hampering my productivity. I have an Nvidia card with the Nvidia driver and I am using TwinView. Could somebody please tell me how to remove this extra duplicated launcher?

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• What does Symfony Framework offer that Zend Framework does not?

  - by Fatmuemoo

  I have professionally working with Zend Framework for about a year. No major complaints. With some modifications, it has done a good job. I'm beginning to work on a side project where I want to heavily rely on MongoDb and Doctrine. I thought it might be a good idea to broaden my horizons and learn another enterprise level framework. There seems to be a lot a buzz about Symfony. After quickly looking over the site and documentation, I must say I came away pretty underwhelmed. I'm woundering what, if anything, Symfony has to offer that Zend doesn't? What would the advantage be in choosing Symfony?

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• Pixel Collision - Detecting corners

  - by Milkboat

  How would I go about detecting the corners of a texture when I use pixel collision detection? I read about corner collision with rectangles, but I am unsure how to adapt it to my situation. Right now my map is tile based and I do rectangular collision until the player is intersecting with a blocked tile, then I switch to pixel collision. The effect I would like to achieve is when the player hits the corner of an object to push him around the side so he doesn't just hit the edge and stop. Any ideas?

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• Turn off laptop display and have monitor

  - by Ryan B

  My laptop display has stopped working and is unfixable! Anyway, I got a full HD monitor and plugged that into the HDMI port of the laptop. I have changed the power settings so that I can close the lid and still have the monitor on, and this all works. However because it is on "mirror displays", I cannot get the full 1080p resolution that the monitor supports, and when I turn off mirror displays and switch off the laptop screen, the monitor will also switch off! I'm really stuck, as I can only get the monitor to display its full resolution if I have it with the laptop screen turned on, and I dont want this because (as the laptop display does not work) things get lost on that side of the screen. HELP. (Dell Studio 1537 Monitor is Samsung SA300 Connected through HDMI Ubuntu 11.10)

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• Transmitting Form Data from the Client to the Web Server

  The steps involved in transmitting form data from the client to the web server User loads web form User enters data in to web form fields User clicks submit On submit page validates fields using JavaScript. If validation errors are found then the validation script stops the browser from canceling posting the data to the web server and displays error messages as needed If the form passes the data validation process then the browser will URL encode the values of every field and post it to the server.  The server reads the posted data from the query string and then again validates the data just to ensure data consistency and to prevent any non-validated data because JavaScript was turned off on the clients browser from being inserted in to a database or passed on to other process If the data passes the second validation check then the server side code will continue with the requested processes

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• Why do I get unknown printer error 0xFA on my EPSON Workforce WF-3540 under Ubuntu 12.10?

  - by potofcoffee

  I recently bought an EPSON Workforce WF-3540, which I'm using under Ubuntu 12.10 with the official driver provided by EPSON. I am often printing batches of about a hundred pages, duplex. When I'm doing this, after about 20 pages, I regularly get an error message on the printer screen, telling me the printer encountered unknown error 0xFA, forcing me to turn the printer off and back on. I talked to EPSON about the problem, but they claim they're not supporting Linux and tell me to ask the Linux community about the problem (and possibly another driver?). So this is what I'm doing here... any ideas? Unfortunately, the documentation does not contain any information pertaining to error code 0xFA and the support hotline wasn't able to give me further information, either. BTW, the problem hasn't happened, so far, when I'm printing smaller batches or not using duplex. Whenever the problem happens, there's a page in the printer that's already been printed on one side, so I'm suspecting the problem's connected with the duplexer.

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• How to install MBR with Maverick or Karmic

  - by Kilos

  I have been using Ubuntu since 9.10. Now Maverick crashed and my MBR is wrecked. I have run dd if=/dev/zero of=/dev/sdb bs=512 count=1 on advice from another Ubuntu user but now I can only install any Windows release and no Ubuntu. How do I completely erase the MBR and then use an Ubuntu live CD or another HDD with Ubuntu on to install a Linux-only MBR please. I am rather new at the technical side of Linux and have bandwidth shortage problems so I can't download large amounts of data. Thanks in advance!

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• How to have a maintainable and manageable Javascript code base

  - by dade

  I am starting a new job soon as a frontend developer. The App I would be working on is 100% Javascript on the client side. all the server returns is an index page that loads all the Javascript files needed by the app. Now here is the problem: The whole of the application is built around having functions wrapped to different namespaces. And from what I see, a simple function like rendering the HTML of a page can be accomplished by having a call to 2 or more functions across different namespace... My initial thought was "this does not feel like the perfect solution" and I can just envisage a lot of issues with maintaining the code and extending it down the line. Now I would soon start working on taking the project forward and would like to have suggestions on good case practices when it comes to writing and managing a relatively large amount of javascript code.

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• Node.js Or servlets?

  - by Nilesh

  I have heard a lot and read about the Javascript server side language i.e Node.js, and saw many comparisons in favor of Node. I don't understand what makes it better or faster, or how it even relates to something as mature as Java Servlets. But Servlets are built on top of a multithreaded programming language as opposed to Node.js. Then how can node.js be faster? If suppose 1000K users query for a database records, then shouldn't Node.js be slower than Servlets. Also Don't servlets have better security compared to Node.js?

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• FAQ&ndash;Highlight GridView Row on Click and Retain Selected Row on Postback

  - by Vincent Maverick Durano

  A couple of months ago I’ve written a simple demo about “Highlighting GridView Row on MouseOver”. I’ve noticed many members in the forums (http://forums.asp.net) are asking how to highlight row in GridView and retain the selected row across postbacks. So I’ve decided to write this post to demonstrate how to implement it as reference to others who might need it. In this demo I going to use a combination of plain JavaScript and jQuery to do the client-side manipulation. I presumed that you already know how to bind the grid with data because I will not include the codes for populating the GridView here. For binding the gridview you can refer this post: Binding GridView with Data the ADO.Net way or this one: GridView Custom Paging with LINQ. To get started let’s implement the highlighting of GridView row on row click and retain the selected row on postback.  For simplicity I set up the page like this: <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server"> <h2>You have selected Row: (<asp:Label ID="Label1" runat="server" />)</h2> <asp:HiddenField ID="hfCurrentRowIndex" runat="server"></asp:HiddenField> <asp:HiddenField ID="hfParentContainer" runat="server"></asp:HiddenField> <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Trigger Postback" /> <asp:GridView ID="grdCustomer" runat="server" AutoGenerateColumns="false" onrowdatabound="grdCustomer_RowDataBound"> <Columns> <asp:BoundField DataField="Company" HeaderText="Company" /> <asp:BoundField DataField="Name" HeaderText="Name" /> <asp:BoundField DataField="Title" HeaderText="Title" /> <asp:BoundField DataField="Address" HeaderText="Address" /> </Columns> </asp:GridView> </asp:Content>   Note: Since the action is done at the client-side, when we do a postback like (clicking on a button) the page will be re-created and you will lose the highlighted row. This is normal because the the server doesn't know anything about the client/browser not unless if you do something to notify the server that something has changed. To persist the settings we will use some HiddenFields control to store the data so that when it postback we can reference the value from there. Now here’s the JavaScript functions below: <asp:content id="Content1" runat="server" contentplaceholderid="HeadContent"> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js" type="text/javascript"></script> <script type="text/javascript">       var prevRowIndex;       function ChangeRowColor(row, rowIndex) {           var parent = document.getElementById(row);           var currentRowIndex = parseInt(rowIndex) + 1;                 if (prevRowIndex == currentRowIndex) {               return;           }           else if (prevRowIndex != null) {               parent.rows[prevRowIndex].style.backgroundColor = "#FFFFFF";           }                 parent.rows[currentRowIndex].style.backgroundColor = "#FFFFD6";                 prevRowIndex = currentRowIndex;                 $('#<%= Label1.ClientID %>').text(currentRowIndex);                 $('#<%= hfParentContainer.ClientID %>').val(row);           $('#<%= hfCurrentRowIndex.ClientID %>').val(rowIndex);       }             $(function () {           RetainSelectedRow();       });             function RetainSelectedRow() {           var parent = $('#<%= hfParentContainer.ClientID %>').val();           var currentIndex = $('#<%= hfCurrentRowIndex.ClientID %>').val();           if (parent != null) {               ChangeRowColor(parent, currentIndex);           }       }          </script> </asp:content>   The ChangeRowColor() is the function that sets the background color of the selected row. It is also where we set the previous row and rowIndex values in HiddenFields.  The $(function(){}); is a short-hand for the jQuery document.ready function. This function will be fired once the page is posted back to the server that’s why we call the function RetainSelectedRow(). The RetainSelectedRow() function is where we referenced the current selected values stored from the HiddenFields and pass these values to the ChangeRowColor) function to retain the highlighted row. Finally, here’s the code behind part: protected void grdCustomer_RowDataBound(object sender, GridViewRowEventArgs e) { if (e.Row.RowType == DataControlRowType.DataRow) { e.Row.Attributes.Add("onclick", string.Format("ChangeRowColor('{0}','{1}');", e.Row.ClientID, e.Row.RowIndex)); } } The code above is responsible for attaching the javascript onclick event for each row and call the ChangeRowColor() function and passing the e.Row.ClientID and e.Row.RowIndex to the function. Here’s the sample output below:   That’s it! I hope someone find this post useful! Technorati Tags: jQuery,GridView,JavaScript,TipTricks

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• Is chess-like AI really inapplicable in turn-based strategy games?

  - by Joh

  Obviously, trying to apply the min-max algorithm on the complete tree of moves works only for small games (I apologize to all chess enthusiasts, by "small" I do not mean "simplistic"). For typical turn-based strategy games where the board is often wider than 100 tiles and all pieces in a side can move simultaneously, the min-max algorithm is inapplicable. I was wondering if a partial min-max algorithm which limits itself to N board configurations at each depth couldn't be good enough? Using a genetic algorithm, it might be possible to find a number of board configurations that are good wrt to the evaluation function. Hopefully, these configurations might also be good wrt to long-term goals. I would be surprised if this hasn't been thought of before and tried. Has it? How does it work?

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• Align tetrahedrons

  - by thedeadlybutter

  I'm currently generating tetrahedron meshes in Unity When a player clicks the side of a mesh, a new one spawns aligned with it, like this. I'm not sure how nor can I find any information on implementing a tetra hedron grid. I tried playing around with the vertices until I realized I need to adjust position & rotation. Any ideas? EDIT: To be clear, the second image was manually placed objects in the Unity Editor. I'm looking to make an algorithm that places the meshes correctly.

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• Multiple problems using BOINC in Ubuntu 12.04

  - by Pablo Viollier

  I installed Berkeley's BOINC software in Windows and I loved it, however I'm having the following problems using it in Ubuntu 12.04: 1) The software doesn't appear in the systray, only in the Unity dock (left side) 2) I can minimize BOINC to the dock but when I open and close other program it maximizes again, wich is very annoying 3) The software can't be closed, it only minimizes to the Unity dock, and nothing happens using right click and close either 4) The software doesn't start at startup or as a startup application 5) It doesn't have a screensaver like in Windows I know it's a lot a problems, but I hope they can be fixed, because I love to use this software, and knowing it's open-software it would be a shame it didn't run on Ubuntu like it should.

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• Uploading or attaching files that located on a shared drive doesn't work?

  - by Alex

  I have this odd, quite minor, but annoying issue that I am quite perplexed about. Whenever I try to upload a file via my browser(let's say attach a file to an email in GMail), I click 'Browse' button and it opens standard file selection dialog, that doesn't show network drives. Further more if I try to drag a file from a network drive into GMail, it doesn't work either, it just doesn't let me do that. This issue has been around for quite sometime now, and I am just curious if this is something on my side or if it's a bug or a misconfiguration of some sort. FWIW, I am currently running 10.10, network drive is a samba share on NAS. This happens in FF and Chrome and this is only happens with Samba mounts. As a matter of fact, NFS volumes that are located on the same network operate perfectly fine.

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• How to setup an encrypted voip structure?

  - by strapakowsky

  What is the simplest way to set up a voip structure in a Linux machine with the following features: 1) Using free software 2) For computer-to-computer calls: end-to-end encryption set by the users, unpaid, no central authority (so skype is out) 3) For computer-to-phone calls: paid or unpaid, desirable encryption on the computer side if that is even possible 4) Ability to have a number to receive calls from regular phones My research concluded that the sip protocol is the most popular. However most discussions I've read on sip are too technical and I felt it discourages the regular user who wants to just click and talk. So I put the question above and created some separate questions about privacy with sip registrars, privacy with voip suppliers, what to look for in a sip registrar, what to look for in a voip provider. As for the software, I noticed most software either don't provide encryption (eg Ekiga) or the software doesn't work nicely and the project is abandoned (eg Twinkle), so no option seemed satisfying.

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• Pointing a subdomain to Github Pages

  - by ratage

  I set up an Octopress blog on Github Pages at myusername.github.com. I now want blog.myusername.me (which currently has a Wordpress blog set up) to point to this Octopress blog. So I followed the instructions here on setting up a custom domain: I ran echo 'blog.myusername.me' >> source/CNAME in my Octopress repository, and then ran rake generate and rake deploy to deploy it to Github. I went to Namecheap, and added a new CNAME under my myusername.me domain: "blog - myusername.github.com - CNAME". Waited a couple hours. However, now when I go to myusername.github.com, it redirects me to blog.myusername.me (which is my old Wordpress blog), which seems like the inverse of what I want. (Going to blog.myusername.me directly still shows my Wordpress blog.) I checked http://www.whatsmydns.net/#CNAME/blog.myusername.me and it seems like my DNS has propagated (myusername.github.com shows up in the right-hand side). Any ideas what I'm doing wrong?

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• Should I be using WAI-ARIA in my HTML website builds?

  - by DBUK

  Should I be using WAI-ARIA in my website builds? Will it have any benefit? Is anyone adding 'role' to their code at the moment? The tab, link, checkbox and slider roles, plus many more, aren't available yet for HTML5. From looking at the list of what is available (see below), and what will be coming in the future, it looks like we might be applying roles to a huge amount of tags on our pages. Its not an issue especially if it brings benefit to users using readers etc Also, a side question, will search engines give any benefits to sites using WAI-ARIA? List of safe roles to use (I think) • role="article" • role="banner" • role="complementary" • role="contentinfo" • role="form" • role="heading" • role="main" • role="navigation" • role="search" Examples of usage: <header role="banner"></div>for a main header, banner only allowed once per page <header role="heading"></div>- for all headers after the main one <aside role="complementary"></aside> <form role="search"></form>

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• Is it convenient to use a XML/JSON generated based system? [closed]

  - by Marcelo de Assis

  One of my clients insists that we missed a requisite for the project(a little social network, using PHP + MySql), is that all queries are made from XML / JSON static files (using AJAX) and not directly from the database. Edit: The main reason, stated by client, is a way to economize bandwith. Even the file loading, has to be using AJAX, to avoid server side processing. We will still use a database to store and insert data. These XML / JSON files will be (re) generated whenever any data is changed by CMS or users. As the project was developed without this "technique", we'll have a lot of work ahead, so I would like to avoid that. I'm asking if it's convenient to use a XML generated based system, because I think a database is already "optimized" and secure to deal with a lot of data traffic. Other issue I'm afraid of, is a chance of conflict when a user is trying to read a XML/JSON which is being just generated.

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• Week in Geek: Botnet Epidemic Fueled by Malware Toolkits Edition

  - by Asian Angel

  This week we learned how to stream media files from any PC to a PlayStation, enable user-specific wireless networks in Windows 7, monitor the bandwidth consumption of individual applications, configure the Linux Grub2 Boot Menu the easy way, “add Dropbox to the Start Menu, understand symbolic links, & rip TV Series DVDs into episode files”, and more Latest Features How-To Geek ETC How to Enable User-Specific Wireless Networks in Windows 7 How to Use Google Chrome as Your Default PDF Reader (the Easy Way) How To Remove People and Objects From Photographs In Photoshop Ask How-To Geek: How Can I Monitor My Bandwidth Usage? Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Here’s a Super Simple Trick to Defeating Fake Anti-Virus Malware Comix is an Awesome Comics Archive Viewer for Linux Get the MakeUseOf eBook Guide to Speeding Up Windows for Free Need Tech Support? Call the Star Wars Help Desk! [Video Classic] Reclaim Vertical UI Space by Adding a Toolbar to the Left or Right Side of Firefox Androidify Turns You into an Android-style Avatar Reader for Android Updates; Now with Feed Widgets and More

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• Game Code Design for Rendering

  - by kuroutadori

  I first created a game on the iPhone and I'm now porting it to Android. I wrote most of the code in C++, but when it came to porting it wasn't so easy. The Android way is to have two threads, one for rendering and one for updating. This due to some devices blocking when updating the hardware. My problem is that I am coming from the iPhone. When I transition, say from the Menu to the Game, I would stop the Animation (Rendering) and load up the next Manager (the Menu has a Manager and so has the Game). I could implement the same thing on Android, but I have noticed on game ports like Quake, don't do this - as far as I can tell. I have learnt that I cannot just dynamically add another Renderer class the the tree because I will probably get a dequeuing buffer error - which I believe to be a problem with the OpenGL ES side. So how is it done?

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• How Can I Safely Destroy Sensitive Data CDs/DVDs?

  - by Jason Fitzpatrick

  You have a pile of DVDs with sensitive information on them and you need to safely and effectively dispose of them so no data recovery is possible. What’s the most safe and efficient way to get the job done? Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-driven grouping of Q&A web sites. The Question SuperUser reader HaLaBi wants to know how he can safely destroy CDs and DVDs with personal data on them: I have old CDs/DVDs which have some backups, these backups have some work and personal files. I always had problems when I needed to physically destroy them to make sure no one will reuse them. Breaking them is dangerous, pieces could fly fast and may cause harm. Scratching them badly is what I always do but it takes long time and I managed to read some of the data in the scratched CDs/DVDs. What’s the way to physically destroy a CD/DVD safely? How should he approach the problem? The Answer SuperUser contributor Journeyman Geek offers a practical solution coupled with a slightly mad-scientist solution: The proper way is to get yourself a shredder that also handles cds – look online for cd shredders. This is the right option if you end up doing this routinely. I don’t do this very often – For small scale destruction I favour a pair of tin snips – they have enough force to cut through a cd, yet are blunt enough to cause small cracks along the sheer line. Kitchen shears with one serrated side work well too. You want to damage the data layer along with shearing along the plastic, and these work magnificently. Do it in a bag, cause this generates sparkly bits. There’s also the fun, and probably dangerous way – find yourself an old microwave, and microwave them. I would suggest doing this in a well ventilated area of course, and not using your mother’s good microwave. There’s a lot of videos of this on YouTube – such as this (who’s done this in a kitchen… and using his mom’s microwave). This results in a very much destroyed cd in every respect. If I was an evil hacker mastermind, this is what I’d do. The other options are better for the rest of us. Another contributor, Keltari, notes that the only safe (and DoD approved) way to dispose of data is total destruction: The answer by Journeyman Geek is good enough for almost everything. But oddly, that common phrase “Good enough for government work” does not apply – depending on which part of the government. It is technically possible to recover data from shredded/broken/etc CDs and DVDs. If you have a microscope handy, put the disc in it and you can see the pits. The disc can be reassembled and the data can be reconstructed — minus the data that was physically destroyed. So why not just pulverize the disc into dust? Or burn it to a crisp? While technically, that would completely eliminate the data, it leaves no record of the disc having existed. And in some places, like DoD and other secure facilities, the data needs to be destroyed, but the disc needs to exist. If there is a security audit, the disc can be pulled to show it has been destroyed. So how can a disc exist, yet be destroyed? Well, the most common method is grinding the disc down to destroy the data, yet keep the label surface of the disc intact. Basically, it’s no different than using sandpaper on the writable side, till the data is gone. Have something to add to the explanation? Sound off in the the comments. Want to read more answers from other tech-savvy Stack Exchange users? Check out the full discussion thread here.     

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