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• What is the most mature library to render equirectangular images in Flash?

  - by Dave Viner

  I have a series of equirectangular images. I'd like to display them in a custom Flash player so that the user could see the spherical nature of the images, and "look up", "look down", "look left/right" (or pan, zoom, etc). (Note that I have a long series of images, so the library must allow for dynamic loading of the images themselves, rather than having the images "baked" into the SWF player.) What is the best library to manage the display of the equirectangular images in Flash? By "best", I mean the most mature, most reliable, most robust, and fastest performing. For reference, an example of an equirectangular image can be found at http://archive.bigben.id.au/tutorials/360/background/projections.html.

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• Starting with an empty dataProvider for a <List>

  - by tictac

  I'm using a List which I need to be empty at the start. I'm adding items to it as needed by clicking a button. Since it's empty, I haven't added a dataProvider property <s:List id="thelist" itemRenderer="listIR" /> To add an item, I'm adding it to the dataProvider directly thelist.dataProvider.addItem() but when I do that, it gives me this error #1009: Cannot access a property or method of a null object reference. Also I have a debugging Alert in the listIR itemRenderer itself and I see that when the list is created, I get that alert twice as if 2 itemRenderers were created, even though the list is supposed to be empty at the start. Any ideas what's wrong with this itemRenderer? How do I start with an empty dataProvider and add items smoothly to it?

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• Tell me how to use ActiveRecord#after_add

  - by Small Wolf

  Hey,Guys! Now I hava a problem,how can I make the callback#after_add receive a reference to the join model in a has_many :through association? my code like this: class Emergency has_many :departments, :through => :eme_references, :after_add => Proc.new { |eme_reference| eme_reference.eme_flag = 1} end the attribute eme_flag is the model EmeReference's attribute! but in the block ,i get the eme_reference.class is Emergency. I want to set the attribute eme_flag of the model EmeReference. That is my question! cheers!

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• Tell me how to use ActiveRecord#afeter_add

  - by Small Wolf

  Hey,Guys! Now I hava a problem,how can I make the callback#after_add receive a reference to the join model in a has_many :through association? my code like this: class Emergency has_many :departments, :through => :eme_references, :source => :email, :after_add => Proc.new { |eme_reference| eme_reference.eme_flag = 1} end the attribute eme_flag is the model EmeReference's attribute! but in the block ,i get the eme_reference.class is Emergency. I want to set the attribute eme_flag of the model EmeReference. That is my question! cheers!

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• Is this Javascript object literal key restriction strictly due to parsing?

  - by George Jempty

  Please refer to the code below, when I "comment in" either of the commented out lines, it causes the error (in IE) of "':' expected". So then is my conclusion correct, that this inability to provide a reference to an object value, as an object key in a string literal; is this strictly an interpreter/parsing issue? Is this a candidate for an awful (or at least "bad") "part" of Javascript, in contrast to Crockford's "good parts"? <script> var keys = {'ONE': 'one'}; //causes error: //var obj1 = {keys.ONE: 'value1'}; //var obj1 = {keys['ONE']: 'value1'}; //works var obj1 = {}; obj1[keys.ONE] = 'value1'; //also works var key_one = keys.ONE; var obj2 = {key_one: 'value1'}; </script>

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• An interesting project to implement to learn Antlr

  - by ajay

  Hi, I am learning Antlr from the book 'The Definitive Antlr reference'. I am still in the beginning stages. I like to do hands on stuff, so I was thinking it would be a great learning experience to do a good sample project. I am looking for a decently sized project, not too big. But just big and complicated enough to help me learn Antlr well. Your inputs will be greatly appreciated! Thanks!

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• Windows service Null ReferenceException

  - by Patrick

  I built a windows service on my local machine. when I install and run it locally it works perfectly fine. When I try to move it to my production machine I get a null reference exception error. I've created an installation package that also works perfectly fine on my machine, but when i run it on the production machine the service still fails. The service references a .dll that in turn has references to 3 other dlls. when i build the project it pulls all of the dlls into the debug folder for the project... I've even installed the service from that folder and it works localy on my machine. I know this has to have something to do with the references, but this is beyond me. Any tips/hints would be appreciated.

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• Function declaration in C and C++

  - by Happy Mittal

  I have two C++ files, say file1.cpp and file2.cpp as //file1.cpp #include<cstdio> void fun(int i) { printf("%d\n",i); } //file2.cpp void fun(double); int main() { fun(5); } When I compile them and link them as c++ files, I get an error "undefined reference to fun(double)". But when I do this as C files, I don't get error and 0 is printed instead of 5. Please explain the reason. Moreover I want to ask whether we need to declare a function before defining it because I haven't declared it in file1.cpp but no error comes in compilation.

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• Foreign Key vs. Independent Relationships - is there improvement with Entity Framework 5?

  - by zam6ak

  I have read several articles and questions on concept of foreign key vs independent relationship when using Entity Framework. And I am still not 100% sure which way to go.... I would prefer not to "pollute" my domain POCOs by having a property that will be used in FK relationship when I already have a property reference to "has a" object. My questions are (looking at you @EFTeam, @Ladislav Mrnka) are there any improvements on this subject in the upcoming Entity Framework v5? are there more advantages if I use FK instead of independent associations (particularly with code first)?

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• Making Django ignore string literals

  - by James

  UPDATE: It turns out this is a deeper question than I thought at first glance - the issue is that python is replacing the string literals before they ever get to django. I will do more investigating and update this if I find a solution. I'm using django to work with LaTeX templates for report generation, and am running into a lot of problems with the way Django replaces parts of strings. Specficially, I've run into two problems where I try to insert a variable containing latex code. The first was that it would replace HTML characters, such as the less than symbol, with their HTML codes, which are of course gibberish to a LaTeX interpreter. I fixed this by setting the context to never autoescape, like so: c = Context(inputs) c.autoescape = False However, I still have my second issue, which is that Django replaces string literals with their corresponding characers, so a double backslash becomes \, and \b becomes a backspace. How can I force Django to leave these characters in place, so inputs['variable'] = '{\bf this is code} \\' won't get mangled when I use {{variable}} to reference it in the django template?

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• Why wasn't C# designed with 'const' for variables and methods?

  - by spoulson

  I suspect const was simplified for the C# spec for general language simplicity. Was there a specific reason we can't declare variable references or methods as const like we can with C++? e.g.: const MyObject o = new MyObject(); // Want const cast referenece of MyObject o.SomeMethod(); // Theoretically legal because SomeMethod is const o.ChangeStuff(); // Theoretically illegal because ChangeStuff is not const class MyObject { public int val = 0; public void SomeMethod() const { // Do stuff, but can't mutate due to const declaration. } public void ChangeStuff() { // Code mutates this instance. Can't call with const reference. val++; } }

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• Multiple resultsets from Oracle in Odp.net,without refcursors

  - by James L

  SQL Server is able to return the results of multiple queries in a single round-trip, e.g: select a, b, c from y; select d, e, f from z; Oracle doesn't like this syntax. It is possible to use reference cursors, like this: begin open :1 for select count(*) from a; open :2 for select count(*) from b; end; However, you incur a penalty in opening/closing cursors and you can hold database locks for an extended period. What I'd like to do is retrieve the results for these two queries in one shot, using Odp.net. Is it possible?

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• Have visual studio copy x64 DLL or x86 DLL when building a C# project

  - by MrPurpleStreak

  We're building a C# app that uses an external DLL for Sqlite.NET. This is a .NET dll but it embeds a C dll inside it and so it comes in x86 and x64 flavours. We add a reference to the x86 version in the project so when we build and run on x86 it's fine. Visual studio copies the dll to the bin folder and runs. On x64 it still copies the x86 version of course and then when it runs it fails to load it. We get round this by temporarily setting our project to be x86 only, but ideally we'd like to tell visual studio to copy the correct version depending on which flavour of machine it is. Any ideas how?

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• Django and a referrer system question

  - by Hellnar

  Hello, I am trying develop a basic referrer system to my Django website, system will be generating a unique url for each users to share with their friends. Once these friends enter this website, system somehow keep the data that "this user is browsing by the reference of X user" and once this invited person decided to register for an account, system will save this information (maybe as an extra Foreign Key of the inviting user in the UserProfile model) Now how can I keep track of the inviting user from the moment entering using the referred link to the point where he/she registers to the site. Would session framework work on this? If not how could this be done ?

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• How can my application submit salesforce case with custom fields?

  - by Aaron

  I have an application that submits bugs for multiple customers to multiple destinations. I would like this application to include salesforce as a destination. I have web reference to the Enterprise WSDL and I am able to create cases for salesforce. This works great until I want to include user defined custom fields as part of the case. The custom fields are strongly typed with a __c prefix for my instance of salseforce. But I will not have the liberty of updating my web service with my customers instance of salesforce. How can I submit a salesforce case with custom fields that are not defined in the WSDL? Should I not be using the Enterprise WSDL?

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• How to build website with two speaking language (Arabic and English)?

  - by Alex

  hi, I am beginner in web designing, I using CLASSIC ASP for web development. My client need his website in two languages (Arabic and English). What is the best way for develop website in multiple language? I read some information from website's :- Create website in two lanuages. for example (www.example.com/English/)and (www.example.com/Arabic/) 2.Use transilaters(Google,SpeakFish,etc..) for your default website. Anyone can help me for this which is the suitable way for develop website in multiple languages? Any reference or any links? hoping your help

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• Issue with storing items in session in MVC

  - by Sundeep

  I have a customer page on which user can enter multiple locations for customer. I am using telerik ajax grid to display locations, and when a new location is added, I am adding it to session and returning back to the grid. Finally, when user submits, customer and all locations using customerid as reference key gets inserted. I am clearing the session, when user enters create/edit page and on successful commit or any exception occurs. Problem is when user adds the locations for one user and then opens another tab, to create another user then all locations get cleared for previous user. Coz of session, this issue is occuring. Something of viewstate would be page specific. But for ajax grid actions, viewdata/viewbag is not working. Any thoughts on how to implement this. Thanks in advance.

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• Maven workspace resolution horked

  - by user237815

  I'm using m2eclipse to manage maven projects. Somehow I did a bad thing, and now the system is behaving as if workspace resolution is disabled. I have several projects that depend on a main project. This project has a version of 4.0-SNAPSHOT, and all the dependent projects reference it in the dependencies section of their poms. Everything was working fine until I created an entirely new project and mistakenly copied the pom from the main project into the new project. Suddenly, all of the dependent projects got the error: "The container 'Maven Dependencies" references non existing library C:\users\myusername.m2\com\mydomain\myproject\4.0-SNAPSHOT\myproject-4.0-SNAPSHOT.jar I zapped the offending new project, but the error remains for all the dependent projects. I've made no changes (to my knowledge) in the main project or any of the dependent projects, so I'm guessing something got changed in the Eclipse environment. Does m2eclipse or Maven itself maintain settings anywhere that I can blow away?

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• how does serializable work in java?

  - by Karl Trumstedt

  If I have an instance of a class that I store in a session I need to make it serializable. This class has a static variable, will this be serialized in every instance stored? The static variable is a reference to a cache containing a lot of data in the background. Will all of this data be serialized? If so, it seems preferable to make this variable transient and re-fetch the cache instance each time the instance is restored. Maybe not store the cache instance at all in the class. Will the constructor execute when a class is restored from a serialized state? if not is there any other method I can use to re-instate a transient variable?

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• Fitting maximum amount of shapes on a surface

  - by Fuu

  In industry, there is often a problem where you need to calculate the most efficient use of material, be it fabric, wood, metal etc. So the starting point is X amount of shapes of given dimensions, made out of polygons and/or curved lines, and target is another polygon of given dimensions. I assume many of the current CAM suites implement this, but having no experience using them or of their internals, what kind of computational algorithm is used to find the most efficient use of space? Can someone point me to a book or other reference that discusses this subject?

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• How often do you implement the big three?

  - by Neil Butterworth

  I was just musing about the number of questions here that either are about the "big three" (copy constructor, assignment operator and destructor) or about problems caused by them not being implemented correctly, when it occurred to me that I could not remember the last time I had implemented them myself. A swift grep on my two most active projects indicate that I implement all three in only one class out of about 150. That's not to say I don't implement/declare one or more of them - obviously base classes need a virtual destructor, and a large number of my classes forbid copying using the private copy ctor & assignment op idiom. But fully implemented, there is this single lonely class, which does some reference counting. So I was wondering am I unusual in this? How often do you implement all three of these functions? Is there any pattern to the classes where you do implement them?

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• WSAT Security tab error for Custom Role provider

  - by shesb

  I have created custome Membership Role and Profile provider using INGRES db. Now I can see my IngresMembership and IngresRole provider in the Provider tab(Select a different provider for each feature (advanced) ) of WSAT but when I clik on security tab I get this error: "There is a problem with your selected data store. This can be caused by an invalid server name or credentials, or by insufficient permission. It can also be caused by the role manager feature not being enabled. Click the button below to be redirected to a page where you can choose a new data store. The following message may help in diagnosing the problem: Object reference not set to an instance of an object." What am I missing? Do I need to add code for all override methods for Role provider? I have just written code for the Initialize and GetRolesForUser functions. Thanks

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• Auto injecting logger with guice

  - by koss

  With reference to Guice's custom injections article, its TypeListener performs a check for InjectLogger.class annotation - which can be optional. Removing that check will inject to all Logger.class types. class Log4JTypeListener implements TypeListener { public <T> void hear(TypeLiteral<T> typeLiteral, TypeEncounter<T> typeEncounter) { for (Field field : typeLiteral.getRawType().getDeclaredFields()) { if (field.getType() == Logger.class && field.isAnnotationPresent(InjectLogger.class)) { typeEncounter.register(new Log4JMembersInjector<T>(field)); } } } } I'm tempted to remove "&& field.isAnnotationPresent(InjectLogger.class)" from the listener. If we're using Guice to inject all instances of our Logger, is there any reason not to do it automatically (without need to annotate)?

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• How do I add a new ItemTemplate to a Guidance Automation Toolkit vs2010 .vsix package?

  - by Maslow

  I have a vs2008 GAT package that has been updated to work on vs2010 which walks a developer through creating a custom solution complete with a Service layer project, Domain, usercontrol, and unit test project. I'd like to add a new ItemTemplate to the package to create a user control or dialog that adheres to our current practices. So far it seems I need a Recipe, but I can not find any reference for the GuidancePackage.xml file and how to properly add things to it, let alone how to add a new Item Template or guidance steps and decisions. How can I add an item template to my add-in?

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• 2 or more Controls only 1 is considered Active

  - by Don

  I have 2 controls (MyCtrl) next to each other called ctrlLeft and ctrlRight. Whenever one receives interaction it is considered active (by default the left one). I override OnDraw and customize the look of the active one a bit. Currently I have a property Active and an event that I subscribe to from all MyCtrl in there I store a reference to the active one like this: if (sender is MyCtrl) { ctrlActive = (sender as MyCtrl); ctrlLeft.Active = !(ctrlRight.Active = (ctrlActive == ctrlRight)); } Either way I need to have ctrlActive as I use it for other things but what I am wondering is if this is the best way make them aware of each other? Another option I thought of was to store references to every possible MyCtrl and then loop through em all and activate / deactivate the one that match sender just in case I in the future add a ctrlMiddle. Are my thoughts wrong, is there better options to do this. For example, how does radiobuttons accomplish their similar functionality?

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