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  • Services or Shared Libraries?

    - by Royal
    I work in an environment where we have several different web applications, where each of them have different features but still need to do similar things: authentication, read from common data sources, store common data, etc. Is it better to build the shared functionality into a set of services, to be called by the web apps, or is it better to make a shared library, which the webapps include? The services or libraries would need to access various databases, and it seems like keeping that access in a single place (service) is a good idea. It would also reduce the number of database connections needed. A service would also keep the logic in a single place, but then it could be argued that a shared library can do the same thing. Are there other benefits to be gained from using services over shared libraries?

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  • Hibernation to a swap file 12.04, fragfile output

    - by MrHug10
    I've been trying for some time now, to get hibernation working in Ubuntu 12.04 on my Dell XPS17. I dualboot Windows 7 and Ubuntu, each having their own partition and one shared partition for all my data and documents. As I would like to be able to swtich from ubuntu to windows without losing all the things I was currently doing in Ubuntu, I would like to be able to use hibernation. In order to achieve this I've followed the information at http://ubuntuforums.org/showthread.php?t=1042946. Only instead of creating my swap file on my linux partition (which is formatted: ext4), I've chosen to create one on my shared partition (which is formatted: ntfs). There is a problem with this though (at least, that's what I think the problem is), because when I call: sudo filefrag -v /media/data/Ubuntu_Swap_Space/6GiB.swap, I get the following output: Filesystem type is: 65735546 File size of /media/Data/Ubuntu_Swap_Space/6GiB.swap is 6442450944 (1572864 blocks, blocksize 4096) Discontinuity: Block 22 is at 25829097 (was 232498) /media/Data/Ubuntu_Swap_Space/6GiB.swap: 2 extents found So I'm not sure what I need to fill in as an offset to follow the rest of the earlier mentioned information. I've tried both the location of block 22 and the number that is listed after that, but when I then try sudo pm-hibernate nothing happens and this shows up in my /var/log/pm-suspend.log s2disk: Could not use the resume device (try swapon -a). Reason: No such device Hope someone can help me out with this! If you need more information about anything, please let me know!

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  • split large text file without missing data record

    - by Santosh
    I have a 140 MB text file, which contains detail information of books in library. For each book details there is a standard format data details in text file. I need to parse it and insert the data in Database. Here, parsing text file is not an issue. I am facing problem in parsing this large file. So i decided to split the file in small file around 2 MB each file. But i can't manually split this large file in so many pieces. I got HJsplit tool, which split the file but this also doesn't helped as this split the file but 1 book details half part is in one file and rest part is in second file. so if i split this way then information will be missed. How to split the large so that i cant miss the information ? Is there any tool which help me in this condition.

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  • Session Tracking - Advantages and Disadvantages

    I use to work for a major internet company that sold Dental Plans to customers through their large customer-driven websiteto consumers. They start tracking their users as soon as they hit their web servers, and then they log everything they can about the user. There are a lot of benefits for using session tracking for both the user and the website. Users can benefit from session tracking due to the fact that a website can retain pertaining information for the user so that they do not have to re-enter the same information repeatedly. In addition, websites can hold specific items in a cart for each user so that they can pay for all of their  items at once when they are ready to complete their purchases. Websites can also benefit from session tracking because they can determine where a specific user came from and which advertising partner gave them a sale. This information is very useful when deciding on where to spend an advertising budget. There is only one real disadvantage when it comes to session tracking, Users can not really control what is actually tracked by a website. Yes, they can disable cookies and this will help, but that means that no tracking can be done at all. Most sites require users to have cookies enabled in order for users to make purchases or login to their accounts.  

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  • Efficiently rendering to 3D texture

    - by TravisG
    I have an existing depth texture and some other color textures, and want to process the information in them by rendering to a 3D texture (based on the depth contained in the depth texture, i.e. a point at (x/y) in the depth texture will be rendered to (x/y/texture(depth,uv)) in the 3D texture). Simply doing one manual draw call for each slice of the 3D texture (via glFramebufferTextureLayer) is terribly slow, since I don't know beforehand to what slice of the 3D texture a given texel from one of the color textures or the depth texture belongs. This means the entire process is effectively for each slice for each texel in depth texture process color textures and render to slice So I have to sample the depth texture completely per each slice, and I also have to go through the processing (at least until to discard;) for all texels in it. It would be much faster if I could rearrange the process to for each texel in depth texture figure out what slice it should end up in process color textures and render to slice Is this possible? If so, how? What I'm actually trying to do: the color textures contain lighting information (as seen from light view, it's a reflective shadow map). I want to accumulate that information in the 3D texture and then later use it to light the scene. More specifically I'm trying to implement Cryteks Light Propagation Volumes algorithm.

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  • Disk Utility Restore causes "Could not validate resource - Invalid Argument"

    - by Yahoo
    I have a problem with Disk Utility on Mac OS X 10.6. I have an image of Windows that I would like to use as a bootable volume on a pen drive or external hard drive. The thing is: When I try to restore the volume from the image I get an error: "Restore Failure: Could not validate resource - Invalid Argument" I read some information about that error on the Internet. I converted the image into .iso (Mac OS Extended/ISO (Joliet) Hybrid Image) format and then got this error: "Restore Failure: Could not find any scan information. The source image needs to be imagescanned before it can be restored." When I try to scan the image for Restore, I get the first message. I really read a lot of information about this topic on the Internet, but I haven't found the solution. I tried both ISO and DMG formats; I don't know which is best.

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  • How can I remove the ssh last login info?

    - by Gnijuohz
    Whenever I log into a server using ssh. The prompt gives me "last login" information. I was wondering where this information comes from. How can I remove this record so when someone else log into the same server, the person would see my login info with my ip in it? So how can I do this? For the record, I am not hacking someone's computer and the server runs Ubuntu 12.04. EDIT: which file logs this kind of information? If I find the file, then I can do anything to it as root. Thanks.

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  • Avoiding coupling

    - by Seralize
    It is also true that a system may become so coupled, where each class is dependent on other classes that depend on other classes, that it is no longer possible to make a change in one place without having a ripple effect and having to make subsequent changes in many places.[1] This is why using an interface or an abstract class can be valuable in any object-oriented software project. Quote from Wikipedia Starting from scratch I'm starting from scratch with a project that I recently finished because I found the code to be too tightly coupled and hard to refactor, even when using MVC. I will be using MVC on my new project aswell but want to try and avoid the pitfalls this time, hopefully with your help. Project summary My issue is that I really wish to keep the Controller as clean as possible, but it seems like I can't do this. The basic idea of the program is that the user picks wordlists which is sent to the game engine. It will pick random words from the lists until there are none left. Problem at hand My main problem is that the game will have 'modes', and need to check the input in different ways through a method called checkWord(), but exactly where to put this and how to abstract it properly is a challenge to me. I'm new to design patterns, so not sure whether there exist any might fit my problem. My own attempt at abstraction Here is what I've gotten so far after hours of 'refactoring' the design plans, and I know it's long, but it's the best I could do to try and give you an overview (Note: As this is the sketch, anything is subject to change, all help and advice is very welcome. Also note the marked coupling points): Wordlist class Wordlist { // Basic CRUD etc. here! // Other sample methods: public function wordlistCount($user_id) {} // Returns count of how many wordlists a user has public function getAll($user_id) {} // Returns all wordlists of a user } Word class Word { // Basic CRUD etc. here! // Other sample methods: public function wordCount($wordlist_id) {} // Returns count of words in a wordlist public function getAll($wordlist_id) {} // Returns all words from a wordlist public function getWordInfo($word_id) {} // Returns information about a word } Wordpicker class Wordpicker { // The class needs to know which words and wordlists to exclude protected $_used_words = array(); protected $_used_wordlists = array(); // Wordlists to pick words from protected $_wordlists = array(); /* Public Methods */ public function setWordlists($wordlists = array()) {} public function setUsedWords($used_words = array()) {} public function setUsedWordlists($used_wordlists = array()) {} public function getRandomWord() {} // COUPLING POINT! Will most likely need to communicate with both the Wordlist and Word classes /* Protected Methods */ protected function _checkAvailableWordlists() {} // COUPLING POINT! Might need to check if wordlists are deleted etc. protected function _checkAvailableWords() {} // COUPLING POINT! Method needs to get all words in a wordlist from the Word class } Game class Game { protected $_session_id; // The ID of a game session which gets stored in the database along with game details protected $_game_info = array(); // Game instantiation public function __construct($user_id) { if (! $this->_session_id = $this->_gameExists($user_id)) { // New game } else { // Resume game } } // This is the method I tried to make flexible by using abstract classes etc. // Does it even belong in this class at all? public function checkWord($answer, $native_word, $translation) {} // This method checks the answer against the native word / translation word, depending on game mode public function getGameInfo() {} // Returns information about a game session, or creates it if it does not exist public function deleteSession($session_id) {} // Deletes a game session from the database // Methods dealing with game session information protected function _gameExists($user_id) {} protected function _getProgress($session_id) {} protected function _updateProgress($game_info = array()) {} } The Game /* CONTROLLER */ /* "Guess the word" page */ // User input $game_type = $_POST['game_type']; // Chosen with radio buttons etc. $wordlists = $_POST['wordlists']; // Chosen with checkboxes etc. // Starts a new game or resumes one from the database $game = new Game($_SESSION['user_id']); $game_info = $game->getGameInfo(); // Instantiates a new Wordpicker $wordpicker = new Wordpicker(); $wordpicker->setWordlists((isset($game_info['wordlists'])) ? $game_info['wordlists'] : $wordlists); $wordpicker->setUsedWordlists((isset($game_info['used_wordlists'])) ? $game_info['used_wordlists'] : NULL); $wordpicker->setUsedWords((isset($game_info['used_words'])) ? $game_info['used_words'] : NULL); // Fetches an available word if (! $word_id = $wordpicker->getRandomWord()) { // No more words left - game over! $game->deleteSession($game_info['id']); redirect(); } else { // Presents word details to the user $word = new Word(); $word_info = $word->getWordInfo($word_id); } The Bit to Finish /* CONTROLLER */ /* "Check the answer" page */ // ?????????????????? ( http://pastebin.com/cc6MtLTR ) Make sure you toggle the 'Layout Width' to the right for a better view. Thanks in advance. Questions To which extent should objects be loosely coupled? If object A needs info from object B, how is it supposed to get this without losing too much cohesion? As suggested in the comments, models should hold all business logic. However, as objects should be independent, where to glue them together? Should the model contain some sort of "index" or "client" area which connects the dots? Edit: So basically what I should do for a start is to make a new model which I can more easily call with oneliners such as $model->doAction(); // Lots of code in here which uses classes! How about the method for checking words? Should it be it's own object? I'm not sure where I should put it as it's pretty much part of the 'game'. But on another hand, I could just leave out the 'abstraction and OOPness' and make it a method of the 'client model' which will be encapsulated from the controller anyway. Very unsure about this.

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  • JavaFX - the right way to use Properties with domain objects

    - by pjm56
    JavaFX has provided a bunch of new Property objects, such as javafx.beans.property.DoubleProperty which allow you to define fields which can be automatically observed and synchronised. In many JFX examples, the MVC model class has a number of these Property fields, which can then bind automatically to the view. However, this seems to be encouraging us to put JFX properties into our Domain objects (if you assume that the Model class is going to be a domain object), which strikes me as a poor separation of concerns (i.e. putting GUI code in the Domain). Has anyone seen this problem being solved in 'real life' and, if so, how was it done?

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  • Brazil is Hot for Social Media

    - by Mike Stiles
    Today’s guest blog is from Oracle SVP Product Development Reggie Bradford, fresh off a visit to Sao Paulo, Brazil where he spoke at the Dachis Social Business Summit and spent some time getting a personal taste for the astonishing growth of social in Brazil, both in terms of usage and engagement. I knew it was big, but I now have an all-new appreciation for why the Wall Street Journal branded Brazil the “social media capital of the universe.” Brazil has the world’s 5th largest economy, an expanding middle class, an active younger demo market, a connected & outgoing culture, and an ongoing embrace of the social media platforms. According to comScore's 2012 Brazil Digital Future in Focus report, 97% are using social media, and that’s not even taking mobile-only users into account. There were 65 million Facebook users in 2012, spending an average 535 minutes there, up 208%. It’s one of Twitter’s fastest growing markets and the 2nd biggest market for YouTube. Instagram usage has grown over 300% since last year. That by itself is exciting, but look at the opportunity for social marketing brands. 74% of Brazilian social users follow brands on Facebook, and 59% have praised a company on either Twitter or Facebook. A 2011 Oh! Panel study found 81% of social networkers there used social to research new products and 75% went there looking for discounts. B2C eCommerce sales in Brazil is projected to hit $26.9 billion by 2015. I bet I’m not the only one who sees great things ahead, and I was fortunate enough give a keynote ABRADI, an association of leading digital agencies in Brazil with 53 execs from 35 agencies attending. I was also afforded the opportunity to give my impressions of what’s going on in Brazil to Jornal Propoganda & Marketing, one of the most popular publications in Latin America for marketers. I conveyed that especially in an environment like Brazil, where social users are so willing to connect and engage brands, marketers need to back away from the heavy-handed, one-way messaging of old school advertising and move toward genuine relationships and trust-building. To aide in this, organizational and operation changes must be embraced inside the enterprise. We've talked often about the new, tighter partnership forming between the CIO and CMO. If this partnership is not encouraged, fostered and resourced, the increasing amount of time consumers spend on mobile and digital, and the efficiencies and integrations offered by cloud-based software cannot be exploited. These are the kinds of changes that can yield social data that, when combined with enterprise data, helps you come to know your social audiences intimately and predict their needs. Consumers are always connected and need your brand to be accessible at any time, be it for information or customer service. And, of course, all of this is happening quite publicly. The holistic, socially-enable enterprise connects social to customer service systems and all other customer touch points, facilitating the kind of immediate, real-time, gratifying response customers are coming to expect. Social users in Brazil are highly active and clearly willing to meet us as brands more than halfway. Empowering yourself with a social management technology platform will have you set up to maximize this booming social market…from listening & monitoring to engagement to analytics to workflow & automation to globalization & language support. Brands, it’s time to be as social as the great people of Brazil are. Obrigado! @reggiebradfordPhoto: Gualberto107, freedigitalphotos.net

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  • Houston We have a Problem with Silverlight Client OM&hellip;

    - by MOSSLover
    So I was playing around with NavigationNodeCollection, which is basically like SPNavigationNodeCollection just to make sure it worked without a hitch…Here is a little sample snippet of what should work: Unfortunately, you get a nice little javascript error that does not allow you to access the child nodes.  I tried a foreach() loop that gets a NavigationNode for each parent then loops through the NavigationNode.Children that did not work either.  I threw in two ExecuteQueryAsync statements thinking that would help, unfortunately adding a second statement provides no different results.  This appears to be a bug in the Silverlight Client Object Model.  I reported the error.  Hopefully, we get a fix by RTM so that we can use the easier method to get items into Silverlight, otherwise it’s back to WCF and cross domain policies.  We all love cross domain policies right? Technorati Tags: Client Object Model,SharePoint 2010,Silverlight

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  • Redirect public traffic to a different subfolder, while local traffic remains unchanged

    - by ecnepsnai
    I would like to have local (intranet) HTTP traffic go to the /var/www/html folder while any public traffic goes to the subfolder, /var/www/html/public I've tried this configuration, with some variation, in httpd.conf <VirtualHost PRIVATE-IP> DocumentRoot /var/www/html ServerName ecn ErrorLog /var/www/logs/error/private CustomLog /var/www/logs/access/private common </VirtualHost> <VirtualHost PUBLIC-IP> DocumentRoot /var/www/html/public ServerName PUBLIC-DOMAIN-NAME ErrorLog /var/www/logs/error/public CustomLog /var/www/logs/access/public common </VirtualHost> PUBLIC-IP, PRIVATE-IP, and PUBLIC-DOMAIN name are all replaced with the correct values in the actual document. The problem is, local traffic can browse fine but remote traffic is directed to the root folder and getting 403d (because I have that folder blocked off through my .htaccess file). If I append /public to the URL it works fine.

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  • Matching my skills with Java and Web Programming

    - by John R
    here is my main question: What is the most common way that Java is used in web development? The reason I ask: I am currently in the process of finding my first internship. Every employer has a separate set of languages, technologies and acronyms they want their candidates to know. In school I did well with Java. As a hobby and interest I have developed a handful of web pages widgets, scripts, etc. My university emphasized Java, C and theory. My hobbies emphasize HTML, PHP, JavaScript, CSS, and a little jQuery, etc. I can't learn a dozen different technologies to satisfy most prospective employers (in what is left of the summer). I think my best bet is combine my skills with Java and my interests in web development. That brings me back to my original question: What is the most common way that Java is used in web development?

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  • How To Create Custom Keyboard Shortcuts For Browser Actions and Extensions in Google Chrome

    - by Chris Hoffman
    Geeks love keyboard shortcuts – they can make you faster and more productive than clicking everything with your mouse. We’ve previously covered keyboard shortcuts for Chrome and other browsers, but you can assign your own custom keyboard shortcuts, too. Google Chrome includes a built-in way to assign custom keyboard shortcuts to your browser extensions. You can also use an extension created by a Google employee to create custom keyboard shortcuts for common browser actions – and less common ones. Image Credit: mikeropology on Flickr (modified) Can Dust Actually Damage My Computer? What To Do If You Get a Virus on Your Computer Why Enabling “Do Not Track” Doesn’t Stop You From Being Tracked

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  • Obtain reference to Parent object during instantiation

    - by GoldBishop
    I have a situation where a custom class is a property of another class. What i need to be able to do, if it is possible at all, is obtain a reverse to the "parent" class (ie the the class that holds the current class as a property). For Instance: Public Class Class1 ... public readonly property Prop11 as Class2 public property Prop12 as String ... End Class Public Class Class2 ... private _par as Class1 private _var21 as string ... Public Sub New(...) me._par = ???? ... End Sub public readonly property Prop21 as string Get return me._par.Prop12 & me._var21 End Get End Property ... End Class Ultimately, i am trying to access other properties within Class1 from Class2 as they do have substance for information from within Class2. There are several other classes within Class1 that provide descriptive information to other classes contained within it as properties but the information is not extensible to all of the classes through Inheritance, as Class1 is being used as a resource bin for the property classes and the application itself. Diagram, lazy design ;): Application <- Class1.Prop12 Application <- Class1.Prop11.Prop21 Question: Is it possible to get a recursion through this design setup?

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  • Python Web Applications: What is the way and the method to handle Registrations, Login-Logouts and Cookies? [on hold]

    - by Phil
    I am working on a simple Python web application for learning purposes. I have chosen a very minimalistic and simple framework. I have done a significant amount of research but I couldn't find a source clearly explaining what I need, which is as follows: I would like to learn more about: User registration User Log-ins User Log-outs User auto-logins I have successfully handled items 1 and 3 due to their simple nature. However, I am confused with item 2 (log-ins) and item 4 (auto-logins). When a user enters username and password, and after hashing with salts and matching it in the DB; What information should I store in the cookies in order to keep the user logged in during the session? Do I keep username+password but encrypt them? Both or just password? Do I keep username and a generated key matching their password? If I want the user to be able to auto-login (when they leave and come back to the web page), what information then is kept in the cookies? I don't want to use modules or libraries that handle these things automatically. I want to learn basics and why something is the way it is. I would also like to point out that I do not mind reading anything you might offer on the topic that explains hows and whys. Possibly with algorithm diagrams to show the process. Some information: I know about setting headers, cookies, encryption (up to some level, obviously not an expert!), request objects, SQLAlchemy etc. I don't want any data kept in a single web application server's store. I want multiple app-servers to be handle a user, and whatever needs to be kept on the server to be done with a Postgres/MySQL via SQLAlchemy (I think, this is called stateless?) Thank you.

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  • Configuring Linux Network

    - by Reiler
    Hi I'm working on some software, that runs on a Centos 5.xx installation. I'ts not allowed for our customers to log in to Linux, everything is done from Windows applications, developed by us. So we have build a frontend for the user to configure network setup: Static/DHCP, ip-address, gateway, DNS, Hostname. Right now I let the user enter the information in the Windows app, and then write it on the Linux server like this: Write to /etc/resolv.conf: Nameserver Write to /etc/sysconfig/network: Gateway and Hostname Write to /etc/sysconfig/network-scripts/ifcfg-eth0: Ipaddress, Netmask, Bootproto(DHCP or Static) I also (after some time) found out that I was unable to send mail, unless I wrote in /etc/hosts: 127.0.0.1 Hostname All this seems to work, but is there a better/easier way to do this? Also, I read the network configuration nearly the same way, but if I use DHCP, I miss som information, for instance the Ip-address. I know that I can get some information from the commandline (ifconfig), but I dont get for instance Hostname, Gateway and DNS. Is there a commandline tool that will display this?

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  • Why does the first partition start at sector 34 when I choose "Guided - Use entire disk" during install?

    - by Kent
    After choosing "Guided - Use entire disk" during installation I find that the first partition starts on sector 34. Why that specific sector and not the first one? (parted) print Model: ATA WDC WD30EZRX-00M (scsi) Disk /dev/sda: 5860533168s Sector size (logical/physical): 512B/4096B Partition Table: gpt Number Start End Size File system Name Flags 1 34s 390659s 390626s fat32 boot 2 390660s 890660s 500001s ext2 3 890661s 5860533118s 5859642458s (parted) In case you prefer bytes as the unit: (parted) unit B (parted) print Model: ATA WDC WD30EZRX-00M (scsi) Disk /dev/sda: 3000592982016B Sector size (logical/physical): 512B/4096B Partition Table: gpt Number Start End Size File system Name Flags 1 17408B 200017919B 200000512B fat32 boot 2 200017920B 456018431B 256000512B ext2 3 456018432B 3000592956927B 3000136938496B

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  • Update problems due to "installation of packages from not authenticated sources" error

    - by Denis Hoss
    I have some problems updating my Ubuntu Requires installation of untrusted packages The action would require the installation of packages from not authenticated sources. cinnamon gir1.2-muffin-3.0 libgnome-keyring-common libgnome-keyring0 libmuffin0 muffin-common The downloads are from the Main server, the Source code under Ubuntu Software tab is marked Is there something I have missed? The output of sudo apt-get update is: W: GPG error: http://ppa.launchpad.net oneiric Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6A9653F936FD5529 W: GPG error: http://ppa.launchpad.net oneiric Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A777609328949509 W: Duplicate sources.list entry http://archive.canonical.com/ubuntu/ oneiric/partner i386 Packages (/var/lib/apt/lists/archive.canonical.com_ubuntu_dists_oneiric_partner_binary-i386_Packages)

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  • Manageable Services

    This article describes a design, implementation and tooling of model driven WorkflowServices logically centralized in the Repository and physically decentralized for their runtime projecting.

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  • HLSL: An array of textures and sampler states

    - by nate142
    The shader must switch between multiple textures depending on the Alpha value of the original texture for each pixel. Now this would word fine if I didn't have to worry about SamplerStates. I have created my array of textures and can select a texture based on the Alpha value of the pixel. But how do I create an Array of SamplerStates and link it to my array of textures? I attempted to treat the SamplerState as a function by adding the (int i) but that didn't work. Also I can't use Texture.Sample since this is shader model 2.0. //shader model 2.0 (DX9) texture subTextures[255]; SamplerState MeshTextureSampler(int i) { Texture = (subTextures[i]); }; float4 SampleCompoundTexture(float2 texCoord, float4 diffuse) { float4 SelectedColor = SAMPLE_TEXTURE(Texture, texCoord); int i = SelectedColor.a; texture SelectedTx = subTextures[i]; return tex2D(MeshTextureSampler(i), texCoord) * diffuse; }

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  • Are there similarities between operating system kernels and programming language kernels?

    - by rahmu
    I know very little about Smalltalk but I noticed that there's a frequent mention of the "kernel". Dan Ingalls prime maintainer of several implementations of Smalltalk also worked on a Javascript environment called "Lively Kernel" and in Peter Siebel's book he kept mentionning the "kernel". I cannot help but think that it is no coincidence that the creators of Smalltalk used the name of a (central) part of operating systems to refer to a particular component of their language. Was it because Smalltalk intended to act as an operating system? Was it because theory behind programming languages and operating systems have a lot in common? What is the reason behind the common appelation of the two components?

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  • How should compound words be handled when coding? Is there a definitive list of compound words? [closed]

    - by Ray
    QUESTION: How should you handle compound words when programming? Are there any good lists available online for developers of generally accepted technology-related compound words? I can see how this is highly ambiguous, so should I just use common-sense? EXAMPLE: I would be inclined to do this: filename NOT FileName or login NOT LogIn However, the microsoft documentation indicates that filename is not compound. So I wonder, is there a more definitive source? See also, this english.stackexchange discussion on filename. Under the section "Capitalization Rules for Compound Words and Common Terms" located here: Microsoft .NET Capitalization Conventions only offers a limited introduction into the topic, and leaves it up to the developer to use their intuition with the rest.

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  • PASS Summit for SQL Starters

    - by Davide Mauri
    I’ve received a buch of emails from PASS Summit “First Timers” that are also somehow new to SQL Server (for “somehow” I mean people with less than 6 month experience but with some basic knowledge of SQL Server engine) or are catching up from SQL Server 2000. The common question regards the session one should not miss to have a broad view of the entire SQL Server platform have some insight into some specific areas of SQL Server Given that I’m on (semi-)vacantion and that I have more free time (not true, I have to prepare slides & demos for several conferences, PASS Summit  - Building the Agile Data Warehouse with SQL Server 2012 - and PASS 24H - Agile Data Warehousing with SQL Server 2012 - among them…but let’s pretend it to be true), I’ve decided to make a post to answer to this common questions. Of course this is my personal point of view and given the fact that the number and quality of session that will be delivered at PASS Summit is so high that is very difficoult to make a choice, fell free to jump into the discussion and leave your feedback or – even better – answer with another post. I’m sure it will be very helpful to all the SQL Server beginners out there. I’ve imposed to myself to choose 6 session at maximum for each Track. Why 6? Because it’s the maximum number of session you can follow in one day, and given that all the session will be on the Summit DVD, they are the answer to the following question: “If I have one day to spend in training, which session I should watch?”. Of course a Summit is not like a Course so a lot of very basics concept of well-established technologies won’t be found here. Analysis Services, Integration Services, MDX are not part of the Summit this time (at least for the basic part of them). Enough with that, let’s start with the session list ideal to have a good Overview of all the SQL Server Platform: Geospatial Data Types in SQL Server 2012 Inside Unstructured Data: SQL Server 2012 FileTable and Semantic Search XQuery and XML in SQL Server: Common Problems and Best Practice Solutions Microsoft's Big Play for Big Data Dashboards: When to Choose Which MSBI Tool Microsoft BI End-User Tools 360° for what concern Database Development, I recommend the following sessions Understanding Transaction Isolation Levels What to Look for in Execution Plans Improve Query Performance by Fixing Bad Parameter Sniffing A Window into Your Data: Using SQL Window Functions Practical Uses and Optimization of New T-SQL Features in SQL Server 2012 Taking MERGE Beyond the Basics For Business Intelligence Information Delivery Analyzing SSAS Data with Excel Building Compelling Power View Reports Managed Self-Service BI PowerPivot 101  SharePoint for Business Intelligence The Best Microsoft BI Tools You've Never Heard Of and for Business Intelligence Architecture & Development BI Power Hour Building a Tabular Model Database Enterprise Information Management: Bringing Together SSIS, DQS, and MDS SSIS Design Patterns Storing Columnstore Indexes Hadoop and Its Ecosystem Components in Action Beside the listed sessions, First Timers should also take a look the the page PASS set up for them: http://www.sqlpass.org/summit/2012/Connect/FirstTimers.aspx See you at PASS Summit!

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  • Changing Your Design for Testability

    Sometimes I come across a way of putting something that it is pithy good, not Hallmark trite, but an impactful and concise way of clarifying a previously obscure concept. A recent one of these happy occurrences was when I was reading the excellent Art of Unit Testing by Roy Osherove. After going through the basics of why youd want to test code and how to do it, Roy confronts a frequent objection to having unit tests, that it ends up changing how you design your components: When we write unit tests for our code, we are adding another end user (the test) to the object model. That end user is just as important as the original one, but it has different goals when using the model.  The test has specific requirements from the object model that seem to defy the basic logic behind a couple of object-oriented principles, mainly encapsulation. [emphasis added by me] When I read this, something clicked for me. I used to find it persuasive that because unit tests caused you to change your design they were more disruptive than they were worth. The counter argument I heard is that the disruption was OK, because testable design was just obviously better. That argument was not convincing as it seemed like delusional arrogance to suggest that any one of type of design was just inherently better for the particular applications I was building. What was missing was that I was not thinking of unit tests as an additional and equal end user to my design. If I accepted that proposition, than it was indeed obvious that a testable design was better because now all users of my component would be satisfied. Have I accepted that proposition? Id phrase it slightly different. I find more and more that having unit tests helps me write better, less buggy code before it gets to production or QA. As I write more unit tests, it gets easier to see how to create testable components, so I dont feel like its taking me as much extra time up front. I pick and choose components that seem most likely to benefit from automated tests and it is working out nicely. If you already implement Test Driven Development, this whole post was probably a waste of your time <g> If you hate the idea of unit tests, well, probably not a great value prop for you either. However, if you are somewhere in between, at least take a minute and check out a sample chapter from Roys book at: http://www.manning.com/osherove/.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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