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• WPF properties memory management

  - by mrpyo

  I'm trying to build binding system similar to the one that is used in WPF and I ran into some memory leaking problems, so here comes my question - how is memory managed in WPF property system? From what I know in WPF values of DependencyProperties are stored in external containers - what I wanna know is how are they collected when DependencyObject dies? Simplest solution would be to store them is some weak reference dictionary - but here comes the main problem I ran into - when there is a listener on property that needs reference to its (this property) parent it holds it (the parent) alive (when value of weak reference dictionary points somewhere, even indirectly, to key - it can't be collected). How is it avoided in WPF without the need of using weak references everywhere?

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• Few specific questions on how games are developed

  - by russ

  When it comes to programming games from the old school sega games like sonic to indie games or angry birds or even to more advance games like Diablo, how exactly is level design done? As in, are the levels sometimes designed straight out of code in an IDE? Or do they create a visual level design editor where things can be placed at the click of a mouse button? I'm imagining old school games or very simple ones like indies are done via code, where extremely complicated ones require a visual editor. Is this correct? Also, when it comes to libraries like SDL or XNA, how often are these used rather than just utilizing OpenGL or DirectX? What about creating your own game engine vs utilizing one already made? Do most use already built engines? This question is directed toward the whole gaming spectrum of indie/big game development. Thanks.

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• Transferring Email to Google Apps - Timing

  - by picus

  I did a site for a client a few months back. Hosting & email was setup through Dreamhost VPS. Hosting has not been an issue, but email has become increasingly dodgy. Long story short, they want to transfer to Google Apps for Biz. They already have the mailboxes setup - they are on macs so they will be transferring using the gmail email importer for mac - my question is this - should they transfer their domain over first or their emails? I'm a developer so I have no problem changing their DNS settings, but I am not an IT manager type by any stretch so I am a bit in the dark about process - my proposed process was: Delete any junk/deleted mail from current environment Backup email locally copy emails to google apps via importer Switch domain and update mac mail settings It seems that doing the domain first would be best but I don't know if that is possible. I have been trying to find a generic checklist, but i haven't been able to.

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• Ubuntu Touch Official Hardware? [duplicate]

  - by user1628

  This question already has an answer here: Where can I get a device with 'Ubuntu for phones' pre-installed? 1 answer I really like the look of Ubuntu touch and I want it ASAP, however, I am NOT willing to buy a device simply to port ubuntu touch on it. I don't want to void all warranties and take any risks. Therefore, I am really just waiting for official ubuntu touch hardware (devices made for ubuntu touch). I can't find any rumours or estimated release dates online, in fact, I can't find out anything at all. Can anyone? If so, what and where? When do you think they'll be official hardware? What price do you think it'll be? Do you think canonical/ubuntu will manufacture it themselves? Thanks, Zach

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• Hiding php includes from search spiders?

  - by 21stcn

  Quick and simple question. I have 80+ html files which I want to be crawled. They are individual product pages. Each of these pages calls its content using php includes. These php include files are in a separate folder on the server and contain the core content for the individual product pages. I just wanted to ask, if I use robots.txt or .htaccess to prevent crawling of the directory that holds the php content files, will there be no issue crawling the html pages which include these files? What I want to achieve is have the html files indexed with the php content included in them, but I don't want visitors landing on the php content pages, nor have these php files indexed as duplicate content. Just clarification needed as to whether it is safe to block spiders from accessing the php folder, without this affecting the html files being indexed with the included content. Is this the best way to do things? Or should I just leave the content php files to be crawled?

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• Is it worth being computer languages polyglot?

  - by Anton Barkowski

  You can often hear that programmers should learn many different languages to improve themselves. I still go to school and don't have big programming experience (a little more than year). But what was noble intention to improve programming skills turned into some kind of OCD: I feel that I won't calm down until I learn all relatively known programming languages. And here is question itself: Will being programming languages polyglot actually help you (And I don't mean usual "Programmer should know at least all paradigms", I mean really all languages you usually hear about)? Does anybody have similar experience? Does it help with job/skills/career? How often are you able to apply those skills?

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• Physical effects of long term keyboard use- what does the science say and what factors affect it?

  - by glenatron

  This question asks about the ergonomics of a particular keyboard for long programming hours, what I would like to know is about the ergonomics of using a keyboard in general. What are the most significant risks associated with it and how can they best be mitigated? Do the "ergonomic" keyboard designs make a difference and if so which design is most effective? If not do other factors such as wrist-rests, regular exercise or having a suitable height of chair or desk make a difference? Do you have any direct experience of problems deriving from keyboard use and if so how did you resolve them? Is there any good science on this and if so what does it indicate? Edited to add: Wikipedia suggests that there are no proven advantages to "ergonomic" keyboards, but their citation seems pretty old- is that still the current state of play?

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• System went to sleep while running do-release-upgrade

  - by Sebi

  I am trying to upgrade from Ubuntu 12.04 to 14.04 on a laptop. I have run sudo do-release-upgrade During the upgrade process the laptop went into sleep/locked screen mode. I have rebooted and noticed that dependencies are broken. Running: lsb_release -a shows that the version has been upgraded to 14.04. However, the upgrade process did not finish(there was no output, I had to restart the workstation as the screen was blinking continuously). Now, following this question I have run sudo apt-get -u dist-upgrade and am now waiting for the process to finish.

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• Executing Shell Commands - PHP or Python?

  - by chadpeppers

  I know basically two languages: Python and PHP. I am primarily a Drupal developer. I have a great idea in creating a command line program that will help some of the mundane tasks and bring my efficiency up quite a bit. The concept is that of a complete console program, almost like the days when I learned C++ using stdin/out. I want to use this came concept but for this program. I am going to be executing shell commands (mainly drush commands, if you are familiar with drush its drupals way of doing tasks like installing drupal, clearing cache, and other things). I am also wanting to do a database and save/execute through multiple objects and site profiles. My general question is this. Which language would be better suited to handle command line code? Drupal is written in PHP so I am leaned more towards that,but I know python seems to handle console programming a bit easier. Any help would be great!

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• Using a :default for file names on include templates in SMARTY 3 [closed]

  - by Yohan Leafheart

  Hello everyone, Although I don't think the question was as good as it could be, let me try to explain better here. I have a site using SMARTY 3 as the template system. I have a template structure similar to the below one: /templates/place1/inner_a.tpl /templates/place1/inner_b.tpl /templates/place2/inner_b.tpl /templates/place2/inner_c.tpl /templates/default/inner_a.tpl /templates/default/inner_b.tpl /templates/default/inner_c.tpl These are getting included on the parent template using {include file="{$temp_folder}/{$inner_template}"} So far great. What I wanted to do is having a default for, in the case that the file "{$temp_folder}/{$inner_template}" does not exists, it uses the equivalent file at "default/{$inner_template}". i.e. If I do {include file="place1/inner_c.tpl"}, since that file does not exists it in fact includes "default/inner_c.tpl" Is it possible?

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• Mise en place de l'autocomplétion dans une application Eclipse RCP, un tutoriel d'Alain Bernard

  Bonjour,Je vous propose un nouvel article qui traite de la mise en place de l'autocomplétion dans une application Eclipse RCP. L'autocomplétion est ce mécanisme bien connu qui permet de proposer à l'utilisateur une liste de choix pour l'insertion d'un contenu dans son document.Dans cet article, nous nous penchons sur deux principaux moyens de la mettre en place : soit sur des composants SWT tels que les champs texte ou les listes déroulantes ; soit dans les éditeurs de texte. http://alain-bernard.developpez.com/...to-completion/Bonne lecture et n'hésitez pas à profiter de cette discussion pour toute remarque ou question !

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• Alpha blend 3D png texture in XNA

  - by ProgrammerAtWork

  I'm trying to draw a partly transparent texture a plane, but the problem is that it's incorrectly displaying what is behind that texture. Pseudo code: vertices1 basiceffect1 // The vertices of vertices1 are located BEHIND vertices2 vertices2 basiceffect2 // The vertices of vertices2 are located IN FRONT vertices1 GraphicsDevice.Clear(Blue); PrimitiveBatch.Begin(); //if I draw like this: PrimitiveBatch.Draw(vertices1, trianglestrip, basiceffect1) PrimitiveBatch.Draw(vertices2, trianglestrip, basiceffect2) //Everything gets draw correctly, I can see the texture of vertices2 trough //the transparent parts of vertices1 //but if I draw like this: PrimitiveBatch.Draw(vertices2, trianglestrip, basiceffect2) PrimitiveBatch.Draw(vertices1, trianglestrip, basiceffect1) //I cannot see the texture of vertices1 in behind the texture of vertices2 //Instead, the texture vertices2 gets drawn, and the transparent parts are blue //The clear color PrimitiveBatch.Draw(vertice PrimitiveBatch.End(); My question is, Why does the order in which I call draw matter?

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• Advice for Storing and Displaying Dates and Times Across Different Time Zones

  A common question I receive from clients, colleagues, and 4Guys readers is for recommendations on how best to store and display dates and times in a data-driven web application. One of the challenges in storing and displaying dates in a web application is that it is quite likely that the visitors arriving at your site are not in the same time zone as your web server; moreover, it's very likely that your site attracts visitors from many different time zones from around the world.Consider an online messageboard site, like <a href="http://www.aspmessageboard.com/">ASPMessageboard.com</a>, where each of 1,000,000+ posts includes the date and time it was made. Imagine a user from New York leaves a post on April 7th at 4:30 PM and that the web server hosting the site

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• Enable wifi on my computer - firmware missing

  - by Sarah

  I am attempting to set up a wireless network on 11.04, freshly download today. The router is on and working. However, I do not have a wifi "card" (which I am assuming is a little USB-type thing that allows internet access, but correct me if I am wrong) and every time I try to type in the MAC address and everything, nothing works. I also get the "firmware missing" error when I scroll over the signal strength, which I have tried looking up but have been unsuccessful with completely understanding it. I guess my main question is do I need another little device to be able to use wifi on my ubuntu? I do have an ethernet cable but another person is using it and I do not want to be tied down to that cable. the problem is that none of the wireless networks show up, however they show up when I go into Windows mode on my laptop. I get an error message at the top saying "firmware missing" which I have tried looking up but still have no straight answer for.

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• Self Documenting Code Vs. Commented Code

  - by Phill

  I had a search but didn't find what I was looking for, please feel free to link me if this question has already being asked. Earlier this month this post was made: http://net.tutsplus.com/tutorials/php/why-youre-a-bad-php-programmer/ Basically to sum it up, you're a bad programmer if you don't write comments. My personal opinion is that code should be descriptive and mostly not require comment's unless the code cannot be self describing. In the example given // Get the extension off the image filename $pieces = explode('.', $image_name); $extension = array_pop($pieces); The author said this code should be given a comment, my personal opinion is the code should be a function call that is descriptive: $extension = GetFileExtension($image_filename); However in the comments someone actually made just that suggestion: http://net.tutsplus.com/tutorials/php/why-youre-a-bad-php-programmer/comment-page-2/#comment-357130 The author responded by saying the commenter was "one of those people", i.e, a bad programmer. What are everyone elses views on Self Describing Code vs Commenting Code?

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• Why prefer a wildcard to a type discriminator in a Java API (Re: Effective Java)

  - by Michael Campbell

  In the generics section of Bloch's Effective Java (which handily is the "free" chapter available to all: http://java.sun.com/docs/books/effective/generics.pdf), he says: If a type parameter appears only once in a method declaration, replace it with a wildcard. (See page 31-33 of that pdf) The signature in question is: public static void swap(List<?> list, int i, int j) vs public static void swap(List<E> list, int i, int j) And then proceeds to use a static private "helper" function with an actual type parameter to perform the work. The helper function signature is EXACTLY that of the second option. Why is the wildcard preferable, since you need to NOT use a wildcard to get the work done anyway? I understand that in this case since he's modifying the List and you can't add to a collection with an unbounded wildcard, so why use it at all?

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• Adding custom interfaces to your mock instance.

  Previously, i made a post  showing how you can leverage the dependent interfaces that is implemented by JustMock during the creation of mock instance. It could be a informative post that let you understand how JustMock behaves internally for classes or interfaces implement other interfaces into it. But the question remains, how you can add your own custom interface to your target mock. In this post, i am going to show you just that. Today, i will not start with a dummy class as usual rather...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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• Apache - .httaccess RewriteRule from domainA to domainB

  - by milo5b

  Problem: I have a website (mywebsite.com) that was, and partly is, indexed in google. Somebody pointed their own domain (theirsite.com) name to my server and DNS, so it resolves with my IP. Now, probably being an older domain, it outranks me in google, and the pages at my domain are starting to getting de-indexed (probably duplicate content or something). So, for example, my homepage got de-indexed, and their homepage (theirsite.com/) is indexed with my content/code/etc. The same is for other pages (theirsite.com/other/page.html is showing mysite.com/other/page.html) Quick-fix: To quickly fix it, I have added few lines to my PHP code, checking for $_SERVER['HTTP_HOST'], and if different than my domain, redirects to my domain. It does the job, but to me it looks like a dirty solution. Question: I could not find a way to have apache to do this job. I would prefer to find an apache/.htaccess solution to this problem (redirecting all traffic from domainA.com/(.*) to domainB.com/$1), is it possible in any way? Thanks

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• Interviewing a DBA

  - by kev

  Our Company is in the Process of recuiting a DBA. I have built a group test of questions from basic questions such as Pk and Fk constraints, simple querries(fizzbuzz style) to more advanced things such as indexes, Collation, isolation levels and how to trace deadlocks. However, that is the limit of my knowledge. So my question to all the DBA's is what is the base level knowledge that all DBA's should have? We are really looking for someone that will be able to manage our replication, analyzing some of our slower running queries(that the devs can go to for help) and someone that can trace some of the deadlock issues that we are having. Any help would be most appreciated!

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• Gamemaker: Making a bullet Spawn at the enemy it was called from

  - by Strokes

  I'm making a gamemaker game with gml. In this game I have multiple enemies (same object) on screen at the same time. I want them to all spawn a bullet at their location. But instead each enemy spawns a bullet at one single enemy. They all shoot but the bullets appear in the wrong location. I want the bullet to spawn at the location of the instance is was called for. How do I do this? Thank you for reading my question. Code: obj_carrier is the enemy I want to spawn from. obj_carrier_bullet is the bullet I want to spawn at location of the carrier There are multiple carriers around the stage. In the step event of the carrier following an if statement: instance_create(obj_carrier.x, obj_carrier.y, obj_carrier_bullet)

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• When Your Favorite Video Game Characters go Trick-or-Treating [Video]

  - by Asian Angel

  Halloween has arrived and all of your favorite video game characters are out and about collecting lots of candy goodness. The question is whether or not all will be successful in collecting treats or if the tricks will be on them! Note: Video contains some language that may be considered inappropriate. Videogame Trick-or-Treating [Dorkly] 6 Start Menu Replacements for Windows 8 What Is the Purpose of the “Do Not Cover This Hole” Hole on Hard Drives? How To Log Into The Desktop, Add a Start Menu, and Disable Hot Corners in Windows 8

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• GP11.1

  - by user13334066

  It's the Assen round of the 2011 motogp season, and Ducati have launched their GP11.1. The Ducati's front end woes were quite efficiently highlighted throughout the 2010 season, with both Casey and Nicky regularly visiting the gravel traps. Now the question is: was it really a front end issue. What's most probable is: the GP10 never had a front end issue. It was the rear that was out. So what did Stoner's team do? They came with setup changes that sorted out the rear end, while transferring the problem to the front. And Casey has this brilliant ability to push beyond the limits of a vague and erratic front end...and naturally the real problem lay hidden. Like Kevin Cameron said: in human nature, our strengths are our weaknesses. Casey's pure speed came at a lack of fine machinery feel, which ultimately took the Ducati in a wrong development direction.

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• Usb Live No hardisk

  - by sergey simeonov

  Ok so i own a toshiba laptop , and the thing is my hdd went bad,but i had a usb flash drive with i live cd Ubuntu on it. Now i dont have and hdd plugged in my laptop im only with a flashdrive. My question is how much memory does this live cd support cause my flash drive is 32 gigs and after about 1.5 gigs of downloads a screen shows up and tells me that i dont have enough space left. the other thing is i dont have money to get a hdd right now so i wanna use this flash drive for now but can i somehow customize the cd thru the live edition so i could have programs that i need after restarts i tried with Customization Live Cd but when i run it , it stops and in my terminal it says could not execute not enough space. So if anyone can tell me what can i do with this problem im having with space on my live Usb ubuntu.

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• Detect frameworks and/or CMS utilized on websites in Firefox

  - by jkneip

  I'm redesigning the website for my academic library and am examining other sites to determine to identify the technologies used. Things like: Web frameworks Javascript frameworks Server-side technology Content management system Now I've had some real success in Firefox using plugins like Wappalyzer, Firebug, and the DOM Inspector. But some sites just don't display any of the info. I'm looking for using these tools, especially it seems it an enterprise-level CMS is being used. Does anyone know of any other tools to detect this kind of data? Also with Firebug & the DOM Inspector, there is a lot of info. displayed and I wondered if there was a way to derive the presence of server-side technologies, CMS's, etc. within certain elements of a web page? Also, if this question is more relevant to another Stack Exchange site, please let me know and I'll post it there instead. Much thanks, Jason

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• What do I need to get a job with a major game company?

  - by MahanGM

  I've been recently working with DirectX and getting familiar with game engines, sub-systems and have done game development for the last 5 years. I have a real question for those whom have worked in larger game making companies before. How is it possible to get to into these big game creators such as Ubisoft, Infinity Ward or EA. I'm not a beginner in my field and I'm going to produce a real nice 2D platform with my team this year, which is the result of 5 years 2D game creation experience. I'm working with prepared engines such as Unity3D or Game Maker software and using .Net with C# to write many tools for our production and proceeding in my way but never had a real engine programming experience 'till now. I'm now reading good books around this topic but I wanted to know: Is it possible to become an employee in big game company by just reading books? I mean beside having an active mind and new ideas and being a solution solver.

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