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• How can robots beat CAPTCHAs?

  - by totymedli

  I have a website e-mail form. I use a custom CAPTCHA to prevent spam from robots. Despite this, I still get spam. Why? How do robots beat the CAPTCHA? Do they use some kind of advanced OCR or just get the solution from where it is stored? How can I prevent this? Should I change to another type of CAPTCHA? I am sure the e-mails are coming from the form, because it is sent from my email-sender that serves the form messages. Also the letter style is the same. For the record, I am using PHP + MySQL, but I'm not searching for a solution to this problem. I was interested in the general situation how the robots beat these technologies. I just told this situation as an example, so you can understand better what I'm asking about.

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• Playing a death anim on an enemy that I want to remove

  - by Max

  I've been trying to find a tutorial on how to best make animations in Android. I already have some animations for my enemies and my character that are controlled by rectangles and changing rectangleframe between updates using a picture like this: When I'm shooting my enemies they lose HP, and when their HP == 0 they get removed. As long as I'm using an arrayList (which I do for all enemies and bullets) I'm fine, since I can just use list.remove(i). But when I'm on a boss-level and the Boss's HP == 0, I want to remove him and play an animation of an explosion of stars before the "End-screen". Is there a preferred way to do temporary animations like this? If you can give me an example or redirect me to a tutorial, I'd be really grateful!

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• Visual Studio Editor Choosing System

  This document gives an overview of how the Visual Studio editor choosing system works, and as an example discusses the XML Editors choosing system.  Visual Studio has the ability to associate multiple editors with a single a file extension.  For instance, .xaml files have multiple editor implementations associated with them. This raises the question of how Visual Studio chooses a specific editor implementation when asked to open a file. his document gives an overview of how the Visual Studio...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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• Finding out which tile a mouse click landed in

  - by Shard

  I am working on an icometric grid based game and im having an issue trying to link a mouse click from the user to a tile. I have been able to split the problem into 2 parts which is first finding a rectangle that sourounds a tile, which I have been able to do but the second part of figuring out from the rectangle which tile the click landed in has got me stumped. Here is an example of a rectangle with tiles on the inside: The rectangle is 70px long and 30px high so if i use an input of say 30x(top)/20y(left) how would I go about determining which tile this fell into?

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• robots.txt dissalow url containing string with a '/' at the end

  - by thanili

  i have a website with thousands of dynamic pages. I want to use the robots.txt file in order to dissalow certain url patterns corresponding to pages with duplicate content. For example i have a page for article itemA belonging to category catA/subcatA, with URL: /catA/subcatA/itemA this is the URL that i want to be indexed from google. this article is also visible via tagging in various other places in the web site. The URLs produced via tagging is like: /tagA1/itemA this URL i want NOT to be indexed from google. However i want to have indexed all tag listings: /tagA1 so how can i achieve this? dissalow URLs of including a specific string with a '/' at the end? /tagA1/ itemA - dissalow /tagA1 - allow

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• Visual Studio Editor Choosing System

  This document gives an overview of how the Visual Studio editor choosing system works, and as an example discusses the XML Editors choosing system.  Visual Studio has the ability to associate multiple editors with a single a file extension.  For instance, .xaml files have multiple editor implementations associated with them. This raises the question of how Visual Studio chooses a specific editor implementation when asked to open a file. his document gives an overview of how the Visual Studio...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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• Templates and Cross-domain client-side binding with RadGrid for ASP.NET AJAX

  Or yet another Twitter grid Yesterday, while I was playing around with this example of our MVC Grid, I thought that the RadGrid for ASP.NET AJAX deserves one too. What I like about this sample scenario is that it gives a perfect opportunity to demonstrate both how to do client cross-site request (as we have received a few questions through our support channels) and to check the future ASP.NET AJAX/jQuery client-side templates prototype.     A wiser guy once said a code sample is worth more than a 1000 words ;) That is why Ill keep it short and let you check the sample project.   Enjoy.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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• How difficult it is to develope Apps for Android and iOS? [on hold]

  - by netsetter

  I'm an experienced web developer in PHP, HTML, Javascript, MySQL, CSS and I'm running communities where people can register to be able to login and do some stuff. Now more and more people are requestion an App, I told them that I have no time and experience to develope Apps with many functions for such complex communities I am running, but then the users told me what would be enough for them and this sounds already simpler to me: An app to install on Android / iOS just to be able to login (+ autologin), so they appear always online in the community when they have internet connection. Then only 1 function like a counter of new activities regarding their user account (new messages, new replies, etc..), and if they click on the app then a browser window will open to read the info at the main website. So, what you think, it will be a big thing to develope such an app for the members? Is there a big diffrence between developing for Android and iOS? How to test the App if you don't have an Android or iOS phone in example?

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• One man software developer product success stories? [on hold]

  - by EugeneKr

  I've got a bad feeling that this question is not appropriate here.. Hopefully you can point me to the right place to ask such a thing (not google though, been there). I want to create my own product, but for some reason have no ideas, so decided to see what people have already done. I would like to start by myself too. I don't mind expanding, but at later stages when it is absolutely necessary. Anyway, to give you an example. There is a guy who created bingo card generation software, then somebody made a wedding planner software and they seem to be doing pretty fine. I would like to know more such cases to draw inspiration from. Do you know such people or maybe you are one of them? Also, if there are places on the net where they dwell, don't hesitate to tell me :) Thanks!

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• multitenancy with some data sharing

  - by user55108

  I'm in the planning stages of a new webapp, and I am leaning strongly toward a multitenancy model. The app has a file storage function, where the user can upload (and operate on) files. I would like the ability of the user to share these files, however. How is this typically accomplished in a multi-tenant model? The example would be something like google docs. Each user has their own files; they can edit and tag and build collections with these files. Then, they can share a doc or a collection with someone else for collaboration. If every user has their own Database and tables, what strategy would one use to allow this kind of sharing while minimizing duplication of files and associated metadata?

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• Observer Pattern Implementation

  - by user17028

  To teach myself basic game programming, I am going to program a clone of Pong. I will use the Observer design pattern, with an interface between the input and the game engine. However, I'm not sure what the interface should do. One idea I had was for the input interface to tell the game engine that (e.g.) the screen was clicked, then to let the game engine decide what to do with that information (shoot a bullet, for example). Another idea I had was for the input interface, having caught the mouse click, to tell the game engine to shoot a bullet. Which method would be better for me to use?

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• Writing a basic C Shell - understanding argv[] [on hold]

  - by Flame

  I have an assignment for my class to write a basic C Shell. I have found many pages that explain parts of it and some fully implemented code. I'm not going to copy, i'm just using it right now as a way to get started. So I'm at the beginning of this project obviously. One example I am looking at parses the user's input and stores a pointer to the beginning of the argument in char *argv[3]; Am I just misunderstanding this or would this technically break if there are more than 3 arguments? (say /a.out arg1 arg2 arg3 etc). Would I wanna malloc this somehow? I know a.out is considered argv[0], and the arguments argv1 - however many there are. It's probably bad practice to have too many arguments for a program, but I still would at least want to address it as I don't know what my TA's are going to use to test my shell.

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• game is playing but broken graphics

  - by mewanttux

  I installed Steam on Lubuntu and wanted to play dota2 (it has source engine) and it sayed i need a 3dts driver or something but i installed it alredy. I can start dota now, but when i start a game it is not... displaying correctly. For example when i pick a hero the 3d modell is covered in some kind of a lasershow and the map...... i looked around a bit think it is because of the drivers and i should have mesa 9. Steam can show the system specs and it says that i have nouveau Gallium 0.4 on NVAA as driver and 3.0 Mesa 10.0.0-devel (git-1100093 saucy-oibaf-ppa) as driverversion and OpenGL 3.0 i am a noob on linux and need step by step guides please

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• XNA: draw a sprite in 3d, is that possible?

  - by Heisenbug

  since now I always used sprited to draw in 2D: spriteBatch.Draw(myTexture, rectangle, color); (I suppose the texture is binded internally to 2 triangles and then scaled.) Now, I'm porting my game in 3D and I have to draw several planes (walls, floor, roof,..). Do I need to manually binding a texture to a geometry (for example using VertexPositionColorTexture with VertexBuffer and IndexBuffer), or is there any simpler way to do that? I'm looking for something like spriteBatch.Draw with the rectangle clip specified in 3d space: spriteBatch.Draw(myTexture, rectangleIn3D, color);

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• Variable names for Contact Information bits

  - by RustyTheBoyRobot

  I am in the middle of refactoring code and would like to get some ideas on variable naming so that my new names clearly represent the data they hold. I have a class called ContactMethod which makes sense to me; each instance is a different way to contact someone. My problem comes when naming the properties of ContactMethod. For example, one instance might be a Fax number of 555-555-5555 while another could be an Email address of [email protected]; I've got a property called contactMethodType to hold the values "fax" or "email", but I don't know what to call the "555-555-5555" or "[email protected]" part. Has anyone here created a good generic name for this piece of contact information? (PS - the old convention was to call it a "Phone" with fields "phoneType" holding the "fax"/"email" value and "phoneId" holding the number/address. Yuck.)

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• How to hide process arguments from other users?

  - by poolie

  A while ago, I used to use the grsecurity kernel patches, which had an option to hide process arguments from other non-root users. Basically this just made /proc/*/cmdline be mode 0600, and ps handles that properly by showing that the process exists but not its arguments. This is kind of nice if someone on a multiuser machine is running say vi christmas-presents.txt, to use the canonical example. Is there any supported way to do this in Ubuntu, other than by installing a new kernel? (I'm familiar with the technique that lets individual programs alter their argv, but most programs don't do that and anyhow it is racy. This stackoverflow user seems to be asking the same question, but actually just seems very confused.)

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• How to track opens and pageviews in PDFs?

  - by Osvaldo

  I know how to track clicks in links to pdfs and pfd's downloads. But I need to track how many times a PDF is opened after being downloaded and if possible track how many times certain pages are shown to users. Tracking has to be done without warnings that personal information is being sent somewhere. I do not want readers personal informations, just to know how many opens happened, so this warnings would be inaccurate. Can anyone help by pointing to a tutorial or an example? If you are sure that this can't be done, can you please point to documentation that explains why?

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• Is there a COMPLETE tutorial for upgrading for dummies?

  - by Windwood Trader

  I have tried upgrading in the past with zero success doing a backup of stuff and futilely attempting to enter my stuff into the new version. My email accounts and folders, my bookmarks and web browser info and of course my photos. In the past I have received messages that the back up files were done using version XXX and cannot be read by the new system, as an example. I need a hand-holding tutorial to go from 11.04 to 12.10. What are the actual step by step mechanics? Frustrated Non-Geek

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• Cannot find the Cocos2d templates

  - by PeterK

  I am about to upgrade to the last version of Cocos2d and would like to uninstall my current Cocos2d templates before installing the new one but cannot find the templates to delete. I have looked at a number of web comments on this such as Uninstall Cocos2D ans another uninstall example but to no avail. However, I still see Cocos2d in my Xcode (4.5) framework. I have been searching my directories but cannot find it. Is there anyone out there who can give me a hint where to find it so i can delete in?

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• Dynamically change page content based on URL parameter?

  - by volume one

  The title of my question seems simple but here is an example of what I want to do: http://www.mayoclinic.com/health/infant-jaundice/DS00107 What happens on that page is whenever you click on a link to go a section (e.g. "Symptoms") in the article on "Infant Jaundice", it provides a URL parameter like this: http://www.mayoclinic.com/health/infant-jaundice/DS00107/DSECTION=symptoms As the DESCTION parameter changes, you get different content on the same page DS00107. The content changes as well as <meta keywords>. Can someone please tell me how this is achieved? I was thinking it was an if/else situation programmed into the page itself to display different properties depending on the URL parameter. Any help or suggestions are very much appreciated and my thanks to you for reading my question.

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• Internet TV streaming applications

  - by mark kirby

  Are there any programs for Ubuntu that can pull TV streams from the Internet ? For example like on a blu-ray player you get BBC iplayer and hulu and youtube as apps, so is there an application that can do this ? I know XMBC can but its to fiddly and resource hungry, I just want the net TV apps and not the full media center. Boxee was great for this, it was a media center but had an interface for the apps not just sticking them in some strange menu like XBMC. Please let me know of anything you know of

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• If I use locks, can my algorithm still be lock-free?

  - by Joe Pension

  A common definition of lock-free is that at least one process makes progress. 1 If I have a simple data structure such as a queue, protected by a lock, then one process can always make progress, as one process can acquire the lock, do what it wants, and release it. So does it meet the definition of lock-free? 1 See eg M. Herlihy, V. Luchangco, and M. Moir. Obstruction-free synchronization: Double-ended queues as an example. In Distributed Computing, 2003. "It is lock-free if it ensures only that some thread always makes progress".

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• What web browsers are there for Ubuntu?

  - by Alvar

  I was wondering what web browsers exist for Ubuntu; I don't want to use wine. I just want the ones written for Ubuntu. I know about Firefox and Google Chrome, you don't need to add them as answers. I've never liked the Ubuntu software center because it never has all of the programs that I might want to install and therefore it's not perfect. I just want a list of all the browsers for Ubuntu and what's the point of them. Example: Firefox: open source, and is pre-installed. Please give me only one browser per answer or this will be confusing.

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• URL Frame redirection CakePHP

  - by themanbehindoftheprojectmayhem

  I need to redirect CakePHP installation host to my domain. Location of my Cakephp installation: myhosting.com/newsite/ Domain: www.mydomain.com I'm currently using URL Frame to direct www.mydomain.com to myhosting.com/newsite/. Problem When I load www.mydomain.com, I see all links in the site is pointing to the hosting location - example - myhosting.com/newsite/product/1 It should be pointing to www.mydomain.com/product/1 Any simple way to fix this? Probably very simple to solve it, but I can't bend it. Help much appreciated.

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• inserting or updating values into null textboxes [closed]

  - by tanya

  this is my sql table structure create table cottonpurchase ( slipNo int null, purchasedate datetime, farmercode int , farmername varchar (100), villagename varchar (100), basicprice int null, premium int null, totalamountpaid int null, weight int null, totalamountbasic int null, totalamountpremium int null, Yeildestimates int null ) I want to fill in the null values in my sql with actual values and not leave them null but I want to do that from my winforms app form! But if I do that it just adds a new record when what I want is for it to update the record which has, for example, farmercode = 2, farmername = blaah, and so on. I also want to enter this in the same records as in farmercode = 2 and the corresponding corresponding basic price = ... , everytime i do it it ends up making a new record and not in the existing one.

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