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• can I use the IOC when using a 3rd party library

  - by Greg

  Hi, Q1 If I have a reusable library that is available, that uses interfaces with classes that use the getInstance concept to create concrete classes for you to use, then in this case would that make sense on the client side to use the IOC container to create instances of these classes? Or is that really applying a double layer of abstraction? Q2 Or in the cases where I'm building the reusable library myself and want the client to use an IOC container, then in my reusable library would I then dispense with any overhead of having factories or "getInstance" methods to instantiate the classes in the client? (i.e. as the IOC container would do this no?)

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• Can I pass constructor parameters to Unity's Resolve() method?

  - by NotDan

  I am using Microsoft's Unity for dependency injection and I want to do something like this: IDataContext context = _unityContainer.Resolve<IDataContext>(); var repositoryA = _unityContainer.Resolve<IRepositoryA>(context); //Same instance of context var repositoryB = _unityContainer.Resolve<IRepositoryB>(context); //Same instance of context IDataContext context2 = _unityContainer.Resolve<IDataContext>(); //New instance var repositoryA2 = _unityContainer.Resolve<IRepositoryA>(context2); RepositoryA and RepositoryB both have a constructor that takes an IDataContext parameter, and I want Unity to initialize the repository with the context that I pass it. Also note that IDataContext is not registered with Unity (I dont want 3 instances of IDataContext).

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• Ajaxing a link in a table

  - by Colin Desmond

  I have a table of results in an ASP.Net MVC page where the last column is an View Details link. I want to have the user click the View Details link and an AJAX method be called to open the results in floating dialog. What I am struggling with is how to link the AJAX call to the link in the results table. I was using a link which embedded the ~/ControllerName/ViewDetails/InstanceId link directly in it. Clicking it took the user to a new page and it is this behaviour I want to replace with an AJAX call and a dialog window. Now I want to attach a jQuery handler to the link to trigger the AJAX call and I can't see how to do this other than write an jQuery handler for each row in the results table. There must be a way to mark the link as an ViewDetails link (using a class?) and attach the jQuery click handler to all instances of type class ViewDetails.

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• Resolving IEnumerable<T> with Unity

  - by Mark Seemann

  Can Unity automatically resolve IEnumerable<T>? Let's say I have a class with this constructor: public CoalescingParserSelector(IEnumerable<IParserBuilder> parserBuilders) and I configure individual IParserBuilder instances in the container: container.RegisterType<IParserSelector, CoalescingParserSelector>(); container.RegisterType<IParserBuilder, HelpParserBuilder>(); container.RegisterType<IParserBuilder, SomeOtherParserBuilder>(); can I make this work without having to implement a custom implementation of IEnumerable<IParserBuilder>? var selector = container.Resolve<IParserSelector>(); So far I haven't been able to express this in any simple way, but I'm still ramping up on Unity so I may have missed something.

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• Memory efficient way of inserting an array of objects with Core Data

  - by randombits

  I'm working on a piece of code for an iPhone application that fetches a bunch of data from a server and builds objects from it on the client. It ends up creating roughly 40,000 objects. They aren't displayed to the user, I just need to create instances of NSManagedObject and store them to persistent storage. Am I wrong in thinking that the only way to do this is to create a single object, then save the context? is it best to create the objects all at once, then somehow save them to the context after they're created and stored in some set or array? If so, can one show some example code for how this is done or point me in the direction to code where this is done? The objects themselves are relatively straight forward models with string or integer attributes and don't contain any complex relationships.

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• Object Oriented Design Questions

  - by Robert

  Hello there. I am going to develop a Tic-Tac-Toe game using Java(or maybe other OO Languages).Now I have a picture in my mind about the general design. Interface: Player ,then I will be able to implement a couple of Player classes,based on how I want the opponent to be,for example,random player,intelligent player. Classes: Board class,with a two-dimensional array of integers,0 indicates open,1 indicates me,-1 indicates opponent.The evaluation function will be in here as well,to return the next best move based on the current board arrangement and whose turn it is. Refree class,which will create instance of the Board and two player instances,then get the game begin. This is a rough idea of my OO design,could anybody give me any critiques please,I find this is really beneficial,thank you very much.

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• PerThreadLifetimeManager in Unity

  - by DorianGrey

  Hi, In the Unity PerThreadLifetimeManager documentation, I read that: "This lifetime manager does not dispose the instances it holds". Ref.: http://msdn.microsoft.com/en-us/library/ff647854.aspx So, if I am using a ThreadPool, does it mean that objects resolved using Unity on a Thread of the ThreadPool will not get disposed at the end of the work done in that thread before being returned to the pool? Any pattern or ideas how I can ensure that the objects do get disposed & I get a clean thread from the thread pool? Thanks!

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• Recommendations on resolving a cs1705 error

  - by Scott A. Lawrence

  I'm upgrading a number of solutions from Visual Studio 2008 to Visual Studio 2010RC. In the process of doing this, I've encountered two instances of compiler error cs1705, one for System.Core and another for System.Data.Linq. In each case, an assembly compiled earlier has a reference to the .NET 4.0 version of these system assemblies, while the web project I'm trying to compile only has references to the .NET 3.5 version of them. Adding .NET 4.0 versions of System.Core and System.Data.Linq to the web project doesn't resolve the error. Removing the .NET 3.5 versions of the assemblies so that only the .NET 4.0 versions remain results in even more errors. Any recommendations on how to resolve this error would be greatly appreciated.

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• Rails remove parent HTML tag

  - by gshankar

  It's pretty easy to sanitize HTML and strip ALL instances of a HTML tag using Rails helpers... But how do you just remove ONE tag? In this case, I'm using a WYSIWYG editor that insists on wrapping all my text in a <p> tag. I want to remove this parent tag without stripping out any other <p> tags within the content of the text. I know I could do this in JQuery really easily but I feel like this should be done server-side in my controller before I save the text. Is there a way to do this?

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• Is it possible to tweak TStringField to work like TWideStringField in Delphi?

  - by mjustin

  We want to use Unicode with Delphi 2009 and Interbase, and found that to switch the character encoding from WIN1252 to UNICODE_FSS we first have to replace all instances of TStringField with TWideStringField in all datamodules. For around 60 datamodules, we can not simply do this over one weekend. I can see only two options for a migration strategy: find a workaround which allows to use the existing TStringField fields without triggering the 'expected: TWideStringField' error or remove all persistent fields to avoid the string type conflict As far as I know the field types for persistent database fields are registered in some kind of class registry. Could we use this to make Delphi believe that a TStringField is ok for a Interbase character column with UNICODE_FSS encoding? Or can we use a commercial dbExpress driver which work with TStringField in both cases? See also my related question: http://stackoverflow.com/questions/2302670/delphi-dbexpress-and-interbase-unicode-migration-steps-and-risks

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• Entity Framework and consuming a WCF service

  - by nakori

  I'm getting data where the database is hidden behind a WCF service. Is it possible to use Entity Framework in a scenario where I have custom objects coming from a web service? (No access to the external database, and no current plans for insert/update/delete logic) Starting with an empty EF model and adding an entity I get this error on compile: No mapping specified for instances of the EntitySet and AssociationSet in the EntityContainer .. Is it possible to make an entity this way, and fill it with data received from an object? (In this case a WCF, but could also be a predefined model class/xml data) If the web service retured a Customer object I could do something like this with a dataset: Make an unbound table and do a loop through the customer properties adding them to a temp row, add it with tbl_Customer.Addtbl_CustomerRow(customerRow) to get my view filled. thanks, nakori

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• Excluding clicks within a DIV from a window.onbeforeunload

  - by nobosh

  Given the following function: window.onbeforeunload= function() { if (CKEDITOR.instances.stuff.getData().length > 0 && oktoquit == false) { return "You have unsaved changes. Click Cancel now, then 'Save' to save them. Click OK now to discard them."; } }; I'd like a way to exclude this function from running if the user clicks a link in a div with an ID: <div id="ignore me"><a href="">blah</a><a href="">blah</a><a href="">blah</a></div> Any ideas?

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• Why is my movie clip instance null?

  - by Khan

  I have 2 movie clips in my scene, one is charlie brown running and another is lucy lifting a football. The movie clip instances are aptly named: lucyLifting and charlieRunning. When I get to frame 75, I run the following code: stop(); trace(lucyLifting); trace(charlieRunning); lucyLifing.stop(); charlieRunning.stop(); and I get the following output: [object MovieClip] null Why isn't it recognizing my second movie clip instance? This is very frustrating.... Thank you in advance.

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• Debugging FLEX/AS3 memory leaks

  - by Scott Evernden

  I have a pretty big Flex & Papervision3D application that creates and destroys objects continually. It also loads and unloads SWF resource files too. While it's running the SWF slowly consumes memory til about 2GB when it croaks the player. Obviously I am pretty sure I let go of reference to instances I no longer want with expectation the GC will do its job. But I am having a heck of a time figuring out where the problem lies. I've tried using the profiler and its options for capturing memory snapshots, etc - but my problem remains evasive. I think there are known problems using debug Flash player also? But I get no joy using the release version either. How do you go about tracking down memory leak problems using FLEX/AS3 ? What are some strategies, tricks, or tools you have used to locate consumption

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• UDDI Best Practices

  - by Andrew Cripps

  My organisation is getting into the SOA world (a bit late, but that's what it's like here!) and we're looking into the ESB Toolkit 2.0 (we already have BizTalk Server 2009). We're keen on implementing UDDI (specifically, the UDDI Services v3.0 that ships with BTS 2009), but we're low on actual UDDI experience. We want to manage the ever-burgeoning number of web services we have across all our environments. What are the best practices for implementing UDDI? For example:- Would you implement a single highly-available resilient UDDI server that hosts all services and bindings, including test environment versions? Or would you implement separate UDDI repositories for test and production environments? I'm aware of the Oasis Technical Note v2.0 on WSDL and UDDI, but does anyone actually implement that? I.e. the abstract parts of the WSDL as tModels, the implementation parts of the WSDL as bindings? Would you go to the effort of capturing non-web service endpoints in UDDI, or just use it for WSDL? What are the "gotchas"?

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• De-dupe a list of hundreds of thousands of first name/last name/address/date of birth

  - by Darren

  I have a large data set which I know contains many dupicate records. Basically I have data on first name, last name, different address components and date of birth. I think the best way to do this is to use the name and date of birth as chances are if these things match, it's the same person. There are probably lots of instances where there are slight differences in spelling (like typos missing a single letter) or use of name (ie: some might have a middle initial in first name column) which would be good to account for, but I'm not sure how to approach this. Are there any tools or articles on going about this process? The data is all in a MySQL database and I have a basic proficiency in SQL.

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• Designing a data model in VS2010 and generating ORM code, application

  - by Kay Zed

  Simply put: I have a database design in my head and I now want to use Visual Studio 2010 to create a WPF application. Key is to use the VS2010 tools to take much as possible manual work out of my hands. -The database engine is SQLite -ORM probably through DBLINQ -Use of LINQ -The application can create new, empty database instances -Easily maintainable (changes in data model possible) Q- How do I start designing the database model (visually) in Visual Studio 2010? Should this be an xsd? Do I do this in a separate project? Q- Next, how can I make the most use of VS2010 code generation tools to generate a business layer? Q- I suppose the business layer will be added as a Data Source (in another project?) and from there it's a rather generic data binding solution? I tried finding clear examples of this but it's a jungle out there, the hunt for a solution is NOT converging to one clear method.... :_(

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• SQL Server 2008 Restore from Backup fails with error 3241 'cannot process this media family'

  - by pearcewg

  I am attempting to backup a database from a SQL Server instance on one machine and restore it to another, and I am encountering the frequently discovered 'SQL Server cannot process this media family' error. Each of my instances are SQL Server 2008, but with different patch levels Restore: 10.0.2531.0 Backup: 10.0.1600.22 ((SQL_PreRelease).080709-1414 ) The restore DB is express. Not sure about the backup version. The backup version is on a virtual private server. The restore is on my development box. When I restore to a different database on the source (backup) server, it restores fine. Lots of stuff on google about this issue, some on stackoverflow about this issue, but nothing which is this exact situation. Any thoughts? It should be straightforward to do a backup and restore from one machine to another (having done this thousands of times in with SQL 6.5,7,2000,2005).

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• Hex colors: Numeric representation for "transparent"?

  - by Pekka

  I am building a web CMS in which the user can choose colours for certain site elements. I would like to convert all colour values to hex to avoid any further formatting hassle ("rgb(x,y,z)" or named colours). I have found a good JS library for that. The only thing that I can't get into hex is "transparent". I need this when explicitly declaring an element as transparent, which in my experience can be different from not defining any value at all. Does anybody know whether this can be turned into some numeric form? Will I have to set up all processing instances to accept hex values or "transparent"? I can't think of any other way.

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• Microsoft Workflow - "Event cannot be delivered"

  - by Wojtek

  I have strange problem. My application is using Windows Workflow Foundation. It is simple app that creates requests and then other presons accepts/denies these requests. Everything was working very fine until my client took application to other servers (app and db). From this time WF instances are created in DB but when app tries to fire event to WF instance it strikes exception: "Event "EventName" for instance id "instanceGUID" cannot be delivered". What went wrong? Any suggestion where to start find the problem?

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• JPA 2.0, hiberante 3.5, jars & persistence.xml location

  - by phmr

  I'm building a desktop application using hibernate 3.5 & JPA 2.0. I have 2 jars, the lib, which defines every entity and DAO, packages looks like this : org.my.package.models org.my.package.models.dao org.my.package.models.utils In org.my.package.utils I defined my hibernate utility class for getting EM & EMF instances, which means the lib is bound to a Persistence Unit name but that's not a problem for now (anyway you can recommend me a better way to manage that) the second jars is built as follow: org.my.package.app META-INF is defined on the root of the project which means in my jar I can find this directories directly in the root: META-INF/ META-INF/persistence.xml org/ org/my/ ... org/my/package/app/Main.class META-INF/ When I run the app, hibernate doesn't managed to find persistence.xml it throws an exception something like "package or class for PersistenceUnitName not found". I googled a bit about the problem but I can't get the source code organisation right. Any help ?

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• UIComponent extended class isn't showing UIComponent extended class

  - by Arno

  I have 1 class (that is extending a UIcomponent) that is representing a component. In that component I create different instances of another class that is also a UIComponent but this class doesn't show up in de first class. I see that it is running and that it has the correct hights but I got the feeling that it doesn't show up with this hights. If I trace I see the width and height is 200 X 200 but there is still nothing visible in my component I bet there is a simple solution for this problem?

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• C# "Enum" Serialization - Deserialization to Static Instance

  - by Walt W

  Suppose you have the following class: class Test : ISerializable { public static Test Instance1 = new Test { Value1 = "Hello" ,Value2 = 86 }; public static Test Instance2 = new Test { Value1 = "World" ,Value2 = 26 }; public String Value1 { get; private set; } public int Value2 { get; private set; } public void GetObjectData(SerializationInfo info, StreamingContext context) { //Serialize an indicator of which instance we are - Currently //I am using the FieldInfo for the static reference. } } I was wondering if it is possible / elegant to deserialize to the static instances of the class? Since the deserialization routines (I'm using BinaryFormatter, though I'd imagine others would be similar) look for a constructor with the same argument list as GetObjectData(), it seems like this can't be done directly . . Which I would presume means that the most elegant solution would be to actually use an enum, and then provide some sort of translation mechanism for turning an enum value into an instance reference. How might one go about this?

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• Database change management tools?

  - by zodeus

  We are currently in the process of solidifying a database change management process. We run MySql 5 running on RedHat 5. I have selected LiquiBase as the tool because it's open source and allows us to expand its functionality later if needed. It also seems to be one of the few free projects that are still active. Has anyone here had any experience using LiquiBase or other Db versioning tools? Company Background: We are an SaaS company providing a 7/24 hosted application. There are dozens of instances running different versions of the same database and we need a way to manage the deploy process as it's starting to get out of control. The databases have hundreds of tables and we typically do releases once every 3 months.

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• State Machine WF: Issues with workflow termination

  - by AgentHunt

  Hello, We have a state machine workflow for maintaining the state of an application submitted by a user. One of the issues I am having is related to workflow termination. In one of the states, I had a bug. When the application reached that state, it threw an exception and as a result, the terminate event of the workflow was called and the particular workflow instance got removed from the persistence database. So I am not able to load that workflow instance anymore. I would have hoped, if there is an error in one of the states, an exception would be thrown(so that we know what the issue is), yet the entire workflow instance should not disappear. Can the fault handler activity ensure that the workflow does not terminate. Also, is there a way, when the terminate event is called, the instances do not get removed from the persistence store. Thanks for any help/suggestions.

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