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  • OpenAL device, buffer and context relationship

    - by Markus
    I'm trying to create an object oriented model to wrap OpenAL and have a little problem understanding the devices, buffers and contexts. From what I can see in the Programmer's Guide, there are multiple devices, each of which can have multiple contexts as well as multiple buffers. Each context has a listener, and the alListener*() functions all operate on the listener of the active context. (Meaning that I have to make another context active first if I wanted to change it's listener, if I got that right.) So far, so good. What irritates me though is that I need to pass a device to the alcCreateContext() function, but none to alGenBuffers(). How does this work then? When I open multiple devices, on which device are the buffers created? Are the buffers shared between all devices? What happens to the buffers if I close all open devices? (Or is there something I missed?)

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  • Assigning a material in Blender with a script

    - by Narcolapser
    Question: How do you assign a material with a script to an object in blender? Info: I have this script to import a proprietary model type of mine that is basically a star map with object consisting of a single vertex. in order to make them look like stars and be visible they are all going to have a halo material assigned to them. I'm figuring out how to make this material and give it the values just fine, but I can't seem to get it to assign. I tried the most obvious thing which was: objectName.setMaterial(materialName) but that did nothing. and when i would take an object that had a material and call the getMaterial function on it, it would return nothing. there is something I'm missing here, can some one shed some light on it? Thanks. ~TA

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  • How to dynamically modify NHibernate load queries at runtime? EventListeners? Interceptors?

    - by snicker
    I need to modify the query used to load many-to-one references in my model. Specifically, I need to be able to further filter this data. Unfortunately, NH will not allow me to filter many-to-one relationships using the built in filtering system (?). I could just be doing something incorrect. Is there a hook where I can manually and dynamically modify the query used to load the data? Or an alternative to filters that will allow me to specify parameters? Background: I am working with a database that is using a form of revision control, with each entity having a natural ID PK, an EntityId, a RevisionValidTo and RevisionValidFrom field. There may be many rows using the same EntityId, which is the reference for other tables to join on, but the Revision ranges are mutually exclusive. Thus, the relationship is only many-to-one IIF the filter is applied. However, NH offers no way to specify a filter on many-to-one references (they do for collections...)

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  • Posting a form with anchor link at the end?

    - by Marcus
    I have a form for comments like the one below but after the form is posted I wish to navigate to http://www.myurl.com/mypage#commentform but I don't know how to do this. Instead of changing my form maybe there is a way to return a View with my model and add #commentform to my url? <div id="commentform"> <h2>Leave a comment</h2> <% using (Html.BeginForm("Comment","Post", FormMethod.Post)) %> <% { %> <div> <%=Html.EditorFor(post => post.Comment) %> <div class="editor-button"> <input type="submit" value="Comment" /> </div> </div> <% } %> </div>

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  • calling invokeAndWait from the EDT

    - by Aly
    Hi, I have a problem following from my previous problem. I also have the code SwingUtillities.invokeAndWait somewhere else in the code base, but when I remove this the gui does not refresh. If I dont remove it the error I get is: Exception in thread "AWT-EventQueue-0" java.lang.Error: Cannot call invokeAndWait from the event dispatcher thread at java.awt.EventQueue.invokeAndWait(Unknown Source) at javax.swing.SwingUtilities.invokeAndWait(Unknown Source) at game.player.humanplayer.model.HumanPlayer.act(HumanPlayer.java:69) The code in HumanPlayer.act is: public Action act(final Action[] availiableActions) { try { SwingUtilities.invokeAndWait(new Runnable() { @Override public void run() { gui.update(availiableActions); } }); } catch (InterruptedException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } synchronized(performedAction){ while(!hasPerformedAction()){ try { performedAction.wait(); } catch (InterruptedException e) { e.printStackTrace(); } } setPerformedAction(false); } return getActionPerfomed(); }

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  • Tweak Data in Doctrine Migration (say, by running some arbitrary queries)

    - by timdev
    I've got a migration that creates a couple of columns that act as foreign keys. In particular, I'm adding a creator_id and owner_id column to a model. These foreign keys indicate who created, and who currently owns, a particular kind of domain object. Users are managed by sfDoctrineGuardPlugin. What I'd like to do, for the purpose of the migration, is look up the (active) user with the lowest id, and default creator_id/owner_id to that. I don't see any particularly obvious/proper way to run arbitrary operations on the database during a migration. Does anyone know how?

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  • Entity Framework 4.1 (Code First) audit column

    - by Ken Pespisa
    I'm using Entity Framework 4.1 with a Code-First approach on an ASP.NET MVC site Say I have an entity named Profile that keeps track of a user's favorite book, and I want to track when the user updates their favorite book. UPDATED: Using the class below as an example, I want to set the FavoriteBookLastUpdated property to the current date whenever the value of the FavoriteBook property changes. public class Profile { public int Id { get; set; } public string Name { get; set; } public string FavoriteBook { get; set; } public DateTime? FavoriteBookLastUpdated { get; set; } } Right now I just update that field, if appropriate, in the controller's Edit action before calling the DBContext's SaveChanges() method. Is there a way I can put that logic in my model somehow? I'd prefer not to use triggers on the database side.

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  • how do i need to place the datapicker using jquery

    - by kumar
    hi, How to place the datapicker inthis code? <fieldset class="empty" id="fieldset"> <legend>School Name</legend> <div class="Edit"> <label for="ID"> ID: <span><%=Html.DisplayFor(e => e.ID)%></span> </label> <label for="Date"> Date: <span><%=Model.Date.ToString("dd-MMM-yyyy") %></span> </label> </fieldset> I need to place Datepicker in Date beside date label? how i can do this? thanks

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  • I can't use Spring filters in servlet-context XML

    - by gotch4
    For some reason both Eclipse and Spring can't find the filter tag (there is even a red mark)... What's wrong? <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:p="http://www.springframework.org/schema/p" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> <bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"></bean> <bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:mysql://localhost/jacciseweb" /> <property name="username" value="root" /> <property name="password" value="siussi" /> </bean> <bean id="mySessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> <property name="dataSource" ref="myDataSource" /> <property name="annotatedClasses"> <list> <value>it.jsoftware.jacciseweb.beans.Utente </value> <value>it.jsoftware.jacciseweb.beans.Ordine </value> </list> </property> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect"> org.hibernate.dialect.MySQLDialect </prop> <prop key="hibernate.show_sql"> true </prop> <prop key="hibernate.hbm2ddl.auto"> update </prop> <prop key="hibernate.cache.provider_class">org.hibernate.cache.NoCacheProvider</prop> </props> </property> </bean> <filter> <filter-name>hibernateFilter</filter-name> <filter-class> org.springframework.orm.hibernate3.support.OpenSessionInViewFilter </filter-class> <init-param> <param-name>singleSession</param-name> <param-value>true</param-value> </init-param> <init-param> <param-name>sessionFactoryBeanName</param-name> <param-value>mySessionFactory</param-value> </init-param> </filter> <!-- <aop:config> --> <!-- <aop:pointcut id="productServiceMethods" --> <!-- expression="execution(* product.ProductService.*(..))" /> --> <!-- <aop:advisor advice-ref="txAdvice" pointcut-ref="productServiceMethods" /> --> <!-- </aop:config> --> <bean id="acciseHibernateDao" class="it.jsoftware.jacciseweb.model.JAcciseWebManagementDaoHibernate"> <property name="sessionFactory" ref="mySessionFactory" /> </bean> <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory" ref="mySessionFactory" /> </bean> <tx:annotation-driven /> <bean id="acciseService" class="it.jsoftware.jacciseweb.model.JAcciseWebManagementServiceImpl"> <property name="dao" ref="acciseHibernateDao" /> </bean> <context:component-scan base-package="it.jsoftware.jacciseweb.controllers"></context:component-scan> <mvc:annotation-driven /> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" p:synchronizeOnSession="true" /> <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" /> <mvc:resources mapping="/resources/**" location="/resources/" /> <!-- non serve, è annotato --> <!-- <bean name="/accise" class="it.jsoftware.jacciseweb.controllers.MainController"> </bean> --> </beans> in particular it says "filter" is invalid content

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  • Where can an absolute beginner of Kohana PHP go to learn how to use it from the ground up?

    - by Sergio Tapia
    Hi guys! I have a month of free time and I've decided to launch my own website. It's going to be big and have dymanic content where different users with different roles can perform modifications to the site. Place comments, rate stores, list items, etc. This sound like a perfect opportunity for me to expand my horizons and learn a PHP Framework. I've used PHP bare bones before but nothing too complex. As of now, do you think Kohana is a mature framework to use? I've used Zend in the past for a course in Uni but it sucked horribly, I was new to the MVC model, but Zend had pretty much zero workable tutorials and guides for newbies. That's why I hated it. Where can I go to learn how to use Kohana from a retarded starting point? Thank you very much for your time.

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  • How do you create a formula that has diminishing returns?

    - by egervari
    I guess this is a math question and not a programming question, but what is a good way to create a formula that has diminishing returns? Here are some example points on how I want the curve to look like. f(1) = 1 f(1.5)= .98 f(2) = .95 f(2.5) = .9 f(3) = .8 f(4) = .7 f(5) = .6 f(10) = .5 f(20) = .25 Notice that as the input gets higher, the percentage decreases rapidly. Is there any way to model a function that has a very smooth and accurate curve that says this? Another way to say it is by using a real example. You know in Diablo II they have Magic Find? There are diminishing returns for magic find. If you get 100%, the real magic find is still 100%. But the more get, your actual magic find goes down. So much that say if you had 1200, your real magic find is probably 450%. So they have a function like: actualMagicFind(magicFind) = // some way to reduced magic find

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  • Change text_factory in Django/sqlite

    - by Krumelur
    I have a django project that uses a sqlite database that can be written to by an external tool. The text is supposed to be UTF-8, but in some cases there will be errors in the encoding. The text is from an external source, so I cannot control the encoding. Yes, I know that I could write a "wrapping layer" between the external source and the database, but I prefer not having to do this, especially since the database already contains a lot of "bad" data. The solution in sqlite is to change the text_factory to something like: lambda x: unicode(x, "utf-8", "ignore") However, I don't know how to tell the Django model driver this.

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  • validate constructor arguments or method parameters with annotations, and let them throw an exceptio

    - by marius
    I am validating constructor and method arguments, as I want to the software, especially the model part of it, to fail fast. As a result, constructor code often looks like this public MyModelClass(String arg1, String arg2, OtherModelClass otherModelInstance) { if(arg1 == null) { throw new IllegalArgumentsException("arg1 must not be null"); } // further validation of constraints... // actual constructor code... } Is there a way to do that with an annotation driven approach? Something like: public MyModelClass(@NotNull(raise=IllegalArgumentException.class, message="arg1 must not be null") String arg1, @NotNull(raise=IllegalArgumentException.class) String arg2, OtherModelClass otherModelInstance) { // actual constructor code... } In my eyes this would make the actual code a lot more readable. In understand that there are annotations in order to support IDE validation (like the existing @NotNull annotation). Thank you very much for your help.

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  • Incremement Page Hit Count in Django

    - by Andrew C
    I have a table with an IntegerField (hit_count), and when a page is visited (ie. http://site/page/3) I want record id 3 'hit_count' column in the database to increment by 1. The query should be like: update table set hit_count = hit_count + 1 where id=3 Can I do this with the standard Django Model conventions? Or should I just write the query by hand? I'm starting a new project, so I am trying to avoid hacks. We'll see how long this lasts! Thanks!

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  • Saving contents of ApplicationState in ASP.Net (MVC)

    - by Saqib
    I have an internal app used to edit XML files on disk. The XML files are loaded into an object model which is stored in ApplicationState. I need to save this data. The one option is to do this every time the user changes some data. However, this seems a bit inefficient - writing the data out to disk each time a change is made. Instead, is it possible to be notified whenever the user closes their browser, plus just before the web server exits? Thus, the data would be saved each time a session ends, plus when the computer shuts down, etc. I thought that Application_End(), Application_Error() and Session_End() in Global.asax would provide this, but these methods don't seem to be called.

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  • Refreshing metadata on user functions t-SQL

    - by luckyluke
    I am doing some T-SQL programming and I have some Views defines on my database. The data model is still changing these days and I have some table functions defined. Sometimes i deliberately use select * from MYVIEW in such a table function to return all columns. If the view changes (or table) the function crashes and I need to recompile it. I know it is in general good thing so that it prevents from hell lotta errors but still... Is there a way to write such functions so the dont' blow up in my face everytime I change something on the underlying table? Or maybe I am doing something completely wrong... Thanks for help

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  • How to deserialize from json to ActiveRecord objects with associations?

    - by Carmine Paolino
    In my Rails application there is a model that has some has_one associations (this is a fabricated example): class Person::Admin < ActiveRecord::Base has_one :person_monthly_revenue has_one :dude_monthly_niceness accepts_nested_attributes_for :person_monthly_revenue, :dude_monthly_niceness end class Person::MonthlyRevenue < ActiveRecord::Base belongs_to :person_admin end class Dude::MonthlyNiceness < ActiveRecord::Base belongs_to :person_admin end The application talks to a backend that computes some data and returns a piece of JSON like this: { "dude_monthly_niceness": { "february": 1.1153232569518972, "october": 1.1250217200558268, "march": 1.3965786869658541, "august": 1.6293418014601631, "september": 1.4062771500697835, "may": 1.7166279693955291, "january": 1.0086401628086725, "june": 1.5711510228365859, "april": 1.5614525597326563, "december": 0.99894169970474289, "july": 1.7263264324994585, "november": 0.95044938418509506 }, "person_monthly_revenue": { "february": 10.585596551505297, "october": 10.574823016656749, "march": 9.9125274764852787, "august": 9.2111604702328922, "september": 9.7905249446675153, "may": 9.1329712474607962, "january": 10.479614016604238, "june": 9.3710235926961936, "april": 9.5897372624830304, "december": 10.052587677671438, "july": 8.9508877843925561, "november": 10.925339756096172 }, } To deserialize it, I use ActiveRecord's from_json, but instead of a Person::Admin object with all the associations in place, I get this error: >> Person::Admin.new.from_json(json) NameError: uninitialized constant Person::Admin::DudeMonthlyNiceness Am I doing something wrong? Is there a better way to deserialize data? (I can modify the backend easily)

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  • Devise authenticating with username instead of email

    - by teknull
    I'm new to Devise and have it working fine by using an email address as the authentication key. However, I have a use case which requires a username instead and I can't seem to get it working. I've added a string column, "username" to the users table, changed the fields from :email to :username in the sign-in form, and have changed the authentication key in devise.rb to :username yet when I go to sign in I'm met with this prompt: "Please enter an email address". What am I doing wrong? **new.html.erb** <div><%= f.label :username %><br /> <%= f.email_field :username %></div> **User.rb** class User < ActiveRecord::Base # Include default devise modules. Others available are: # :token_authenticatable, :encryptable, :confirmable, :lockable, :timeoutable and :omniauthable devise :database_authenticatable, :registerable, :recoverable, :rememberable, :trackable, :validatable, :authentication_keys => [:username] # Setup accessible (or protected) attributes for your model attr_accessible :email, :password, :password_confirmation, :remember_me, :username # attr_accessible :title, :body end **devise.rb** config.authentication_keys = [ :username ]

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  • Rails: has_many association with a table in another database and without foreign key

    - by Fernando
    Here is my situation. I have model called Account. An account can have one or more contracts. The problem is that i'm dealing with a legacy application and each account's contracts are stored in a different database. Example: Account 1's contract are in account1_db.contracts. Account 2's contract are in account2_db.contracts. The database name is a field stored in accounts table. How can i make rails association work with this? This is a legacy PHP application and i simply can't change it to store everything in one table. I need to make it work somehow. I tried this, but it didn't worked: has_many :contracts, :conditions => [lambda{ Contract.set_table_name(self.database + '.contracts'); return '1' }] Any ideas?

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  • Symfony2 Setting a default choice field selection

    - by Mat
    I am creating a form in the following manner: $form = $this->createFormBuilder($breed) ->add('species', 'entity', array( 'class' => 'BFPEduBundle:Item', 'property' => 'name', 'query_builder' => function(ItemRepository $er){ return $er->createQueryBuilder('i') ->where("i.type = 'species'") ->orderBy('i.name', 'ASC'); })) ->add('breed', 'text', array('required'=>true)) ->add('size', 'textarea', array('required' => false)) ->getForm() How can I set a default value for the species listbox? Thank you for your response, I apologise, I think I should rephrase my question. Once I have a value that I retrieve from the model, how do I set that value as SELECTED="yes" for the corresponding value in the species choice list? So, that select option output from the TWIG view would appear like so: <option value="174" selected="yes">Dog</option>

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  • "Anagram solver" based on statistics rather than a dictionary/table?

    - by James M.
    My problem is conceptually similar to solving anagrams, except I can't just use a dictionary lookup. I am trying to find plausible words rather than real words. I have created an N-gram model (for now, N=2) based on the letters in a bunch of text. Now, given a random sequence of letters, I would like to permute them into the most likely sequence according to the transition probabilities. I thought I would need the Viterbi algorithm when I started this, but as I look deeper, the Viterbi algorithm optimizes a sequence of hidden random variables based on the observed output. I am trying to optimize the output sequence. Is there a well-known algorithm for this that I can read about? Or am I on the right track with Viterbi and I'm just not seeing how to apply it?

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  • Best Ruby ORM for Wrapping around Legacy SQL Server Database?

    - by Technocrat
    Hi. I found this answer and it sounds like almost exactly what I'm doing. I have heard mixed answers about whether or not datamapper can support SQL Server through dataobjects. Basically, we have an app that uses a consistently structured database, consistently named tables, etc in SQL Server. We're making all kinds of tools and stuff that have to interact with it, some of them remotely and so I decided that we need to create some common, simple access point to do read/write operations on the SQL Server app since it's API is all C# and other things I despise. Now my question is if anyone has any examples or projects they know of where a ruby ORM can essentially create models for another application's legacy database by defining the conventions of each model's pkeys, fkeys, table names, etc. Sequel is the only ORM I've used with SQL Server but never to do anything quite like this. Any suggestions?

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  • Can I do transactions and locks in CouchDB?

    - by damian
    I need to do transactions (begin, commit or rollback), locks (select for update). How can I do it in a document model db? Edit: The case is this: I want to run an auctions site. And I think how to direct purchase as well. In a direct purchase I have to decrement the quantity field in the item record, but only if the quantity is greater than zero. That is why I need locks and transactions. I don't know how to address that without locks and/or transactions. Can I solve this with CouchDB?

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  • Tracking pageviews and displaying related data

    - by zeky
    I want track which articles a user read on a website. Then with that data, be able to know: 1) - top N articles read in the last hour/day/week/month 2) - show recommendations ("users who read this, also read that") 3) - same as (1), but for a specific section on the site Since the site has high traffic ( 1M views/day) i can't use a RDBMS for this. I started to look at NoSQL (cassandra specifically) and since it's all new to me i'm not sure it's what i need or not. I'm possitive i'm not the first one who needs something like this but couldn't find links/articles giving me pointers on how to do something like this. Is NoSQL the best aproach? Any tips on the data model? Thanks.

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  • Mahout Recommendations on Binary data

    - by Pranay Kumar
    Hi, I'm a newbie to mahout.My aim is to produce recommendations on binary user purchased data.So i applied item-item similarity model in computing top N recommendations for movie lens data assuming 1-3 ratings as a 0 and 4-5 ratings as a 1.Then i tried evaluating my recommendations with the ratings in the test-data but hardly there have been two or three matches from my top 20 recommendations to the top rated items in test data and no match for most users. So are my recommendations totally bad by nature or do i need to go for a different measure for evaluating my recommendations ? Please help me ! Thanks in advance. Pranay, 2nd yr ,UG student.

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