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  • GameKit and GKPeerPicker on 1st Gen iPhone and iPod Touch

    - by Reese McLean
    This is my current set up for my multiplayer game: A view that gives connection tips and warns the user that multiplayer will not work on the 1st Gen iPhone or ipod Touch. There is a "connect" button that pushes the game view and starts the GKPeerPicker. Unfortunately, I don't have a 1st Gen iPhone or iPod Touch to test what happens if they press the connect button. The view will be pushed, but I don't know what will happen when the PeerPicker tries to show. So the Question(s): Is there anyway to tell if the user will not be able to use GameKit so that I can disable the "connect" button? What will happen if they do press the connect button and GameKit is not available?

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  • Resolving ambiguous this pointer in C++

    - by Paul Tevis
    I'm trying to derive a new class from an old one. The base class declaration looks like this: class Driver : public Plugin, public CmdObject { protected: Driver(); public: static Driver* GetInstance(); virtual Engine& GetEngine(); public: // Plugin methods... virtual bool InitPlugin (Mgr* pMgr); virtual bool Open(); virtual bool Close(); // CmdObject virtual bool ExecObjCmd(uint16 cmdID, uint16 nbParams, CommandParam *pParams, CmdChannelError& error); Mgr *m_pMgr; protected: Services *m_pServices; Engine m_Engine; }; Its constructor looks like this: Driver::Driver() : YCmdObject("Driver", (CmdObjectType)100, true), m_Engine("MyEngine") { Services *m_pServices = NULL; Mgr *m_pMgr = NULL; } So when I created my derived class, I first tried to simply inherit from the base class: class NewDriver : public Driver and copy the constructor: NewDriver::NewDriver() : CmdObject("NewDriver", (EYCmdObjectType)100, true), m_Engine("MyNewEngine") { Services *m_pServices = NULL; Mgr *m_pMgr = NULL; } The compiler (VisualDSP++ 5.0 from Analog Devices) didn't like this: ".\NewDriver.cpp", line 10: cc0293: error: indirect nonvirtual base class is not allowed CmdObject("NewDriver", (EYCmdObjectType)100, true), That made sense, so I decided to directly inherit from Plugin and CmdObject. To avoid multiple inheritance ambiguity problems (so I thought), I used virtual inheritance: class NewDriver : public Driver, public virtual Plugin, public virtual CmdObject But then, in the implementation of a virtual method in NewDriver, I tried to call the Mgr::RegisterPlugin method that takes a Plugin*, and I got this: ".\NewDriver.cpp", line 89: cc0286: error: base class "Plugin" is ambiguous if (!m_pMgr->RegisterPlugin(this)) How is the this pointer ambiguous, and how do I resolve it? Thanks, --Paul

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  • Creating a multi-step process with mysql and php

    - by Paul Atkins
    Hi, I am working on a script which allows users to create a stepped process. The steps will consist of sending visitors to urls where they will fill out a form then be directed to the next step the user has created. Each user can create as many steps as they wish and the url for each step will be unique. I am not sure if I am doing this in the correct/most efficient way so I have a few questions about this. Before I begin here is a simple version of my table structure: step_id user_id step_url step_order 1 1 example.com?step=1 1 2 2 test.com?step=1 1 3 1 example.com?step=3 2 A visitor will be directed to step_url: example.com?step=1 by user_id: 1 On this page there will be a form which contains a hidden field with the value of the step_id like this: <input type="hidden" name="step_id" value="1"> Once the visitor has filled out this form it will be processed by my script at a url similar to: http://mysite.com/form-process.php Once the form has been submitted I then need to direct the visitor to the next step my user has created. I would currently do this using code similar to this: SELECT step_url FROM table WHERE step_order='$current_step_order'+1 Here are my questions about this: Is this the best most efficient way to accomplish this? Or is there a better way? As the step_id column is auto increment...how would I increment the order column by 1 each time a user inserts a new step? Thanks for taking the time to read this. Paul

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  • MVC and repository pattern data effeciency

    - by Shawn Mclean
    My project is structured as follows: DAL public IQueryable<Post> GetPosts() { var posts = from p in context.Post select p; return posts; } Service public IList<Post> GetPosts() { var posts = repository.GetPosts().ToList(); return posts; } //Returns a list of the latest feeds, restricted by the count. public IList<PostFeed> GetPostFeeds(int latestCount) { List<Post> post - GetPosts(); //CODE TO CREATE FEEDS HERE return feeds; } Lets say the GetPostFeeds(5) is supposed to return the 5 latest feeds. By going up the list, doesn't it pull down every single post from the database from GetPosts(), just to extract 5 from it? If each post is say 5kb from the database, and there is 1 million records. Wont that be 5GB of ram being used per call to GetPostFeeds()? Is this the way it happens? Should I go back to my DAL and write queries that return only what I need?

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  • MVC and repository pattern data efficiency

    - by Shawn Mclean
    My project is structured as follows: DAL public IQueryable<Post> GetPosts() { var posts = from p in context.Post select p; return posts; } Service public IList<Post> GetPosts() { var posts = repository.GetPosts().ToList(); return posts; } //Returns a list of the latest feeds, restricted by the count. public IList<PostFeed> GetPostFeeds(int latestCount) { List<Post> post - GetPosts(); //CODE TO CREATE FEEDS HERE return feeds; } Lets say the GetPostFeeds(5) is supposed to return the 5 latest feeds. By going up the list, doesn't it pull down every single post from the database from GetPosts(), just to extract 5 from it? If each post is say 5kb from the database, and there is 1 million records. Wont that be 5GB of ram being used per call to GetPostFeeds()? Is this the way it happens? Should I go back to my DAL and write queries that return only what I need?

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  • Windows Service Conundrum

    - by Paul Johnson
    All, I have a Custom object which I have written using VB.NET (.net 2.0). The object instantiates its own threading.timer object and carries out a number of background process including periodic interrogation of an oracle database and delivery of emails via smtp according to data detected in the database. The following is the code implemented in the windows service class Public Class IncidentManagerService 'Fakes Private _fakeRepoFactory As IRepoFactory Private _incidentRepo As FakeIncidentRepo Private _incidentDefinitionRepo As FakeIncidentDefinitionRepo Private _incManager As IncidentManager.Session 'Real Private _started As Boolean = False Private _repoFactory As New NHibernateRepoFactory Private _psalertsEventRepo As IPsalertsEventRepo = _repoFactory.GetPsalertsEventRepo() Protected Overrides Sub OnStart(ByVal args() As String) ' Add code here to start your service. This method should set things ' in motion so your service can do its work. If Not _started Then Startup() _started = True End If End Sub Protected Overrides Sub OnStop() 'Tear down class variables in order to ensure the service stops cleanly _incManager.Dispose() _incidentDefinitionRepo = Nothing _incidentRepo = Nothing _fakeRepoFactory = Nothing _repoFactory = Nothing End Sub Private Sub Startup() Dim incidents As IList(Of Incident) = Nothing Dim incidentFactory As New IncidentFactory incidents = IncidentFactory.GetTwoFakeIncidents _repoFactory = New NHibernateRepoFactory _fakeRepoFactory = New FakeRepoFactory(incidents) _incidentRepo = _fakeRepoFactory.GetIncidentRepo _incidentDefinitionRepo = _fakeRepoFactory.GetIncidentDefinitionRepo 'Start an incident manager session _incManager = New IncidentManager.Session(_incidentRepo, _incidentDefinitionRepo, _psalertsEventRepo) _incManager.Start() End Sub End Class After a little bit of experimentation I arrived at the above code in the OnStart method. All functionality passed testing when deployed from VS2005 on my development PC, however when deployed on a true target machine, the service would not start and responds with the following message: "The service on local computer started and then stopped..." Am I going about this the correct way? If not how can I best implement my incident manager within the confines of the Windows Service class. It seems pointless to implement a timer for the incidentmanager because this already implements its own timer... Any assistance much appreciated. Kind Regards Paul J.

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  • Due Date set via EWS is wrong in reminder popup

    - by Paul McLean
    I'm having some trouble using EWS with tasks and reminders, specifically, the due date. When I run my code, shown below, the task is added to my exchange account and I can see it fine in outlook. All the data in it looks fine too. However, if I specify to have a reminder for the task, the due date it shows is very wrong. It's usually 17 hours in the future, but the screenshot I've provided shows it being 19 hours in the future. I'm finding it very strange that if I open the task, the due date looks fine, but the reminder is saying it is due well into the future. Any ideas? Screenshot: http://s970.photobucket.com/albums/ae187/paulehn/?action=view&current=ewstask.jpg ExchangeVersion exchVersion = new ExchangeVersion(); exchVersion = ExchangeVersion.Exchange2007_SP1; ExchangeService service = new ExchangeService(exchVersion); service.UseDefaultCredentials = true; service.Url = new Uri("https://mail.domain.com.au/ews/exchange.asmx"); Task task = new Task(service); task.Subject = "Subject"; task.Body = new MessageBody(BodyType.HTML, "Body"); task.StartDate = DateTime.Today; task.DueDate = DateTime.Now.AddHours(2); task.ReminderDueBy = DateTime.Now; task.ReminderMinutesBeforeStart = 15; task.IsReminderSet = true; task.Save();

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  • Control parent must be X

    - by Shawn Mclean
    In silverlight, how do I create a usercontrol whose parent must be of a specific control? Eg. I create control Foo, Foo can only be a child of control FooParent. If in blend, they drag it to inside anything except for a FooParent control, it throws error. Foo should then be able to access properties and public methods of FooParent. Is there an official way to accomplish this?

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  • how to insert multiple rows using cakephp

    - by Paul
    In the cakePHP project I'm building, I want to insert a defined number of identical records. These will serve as placeholders records that will have additional data added later. Each record will insert the IDs taken from two belongs_to relationships as well as two other string values. What I want to do is be able to enter a value for the number of records I want created, which would equate to how many times the data is looped during save. What I don't know is: 1) how to setup a loop to handle a set number of inserts 2) how to define a form field in cakePHP that only sets the number of records to create. What I've tried is the following: function massAdd() { $inserts_required = 1; while ($inserts_required <= 10) { $this->Match->create(); $this->Match->save($this->data); echo $inserts_required++; } $brackets = $this->Match->Bracket->find('list'); $this->set(compact('brackets')); } What happens is: 1) at the top of the screen, above the doc type, the string 12345678910 is displayed, this is displayed on screen 2) a total of 11 records are created, and only the last record has the values passed in the form. I don't know why 11 records as opposed to 10 are created, and why only the last records has the entered form data? As always, your help and direction is appreciated. -Paul

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  • Help with MySQL query - Product orders report without duplicate shipping charges

    - by Paul
    Hello, I have an issue creating a custom report for an e-commerce store running on osCommerce. The client wants the report to have the following columns: Date, Order ID, Product Class, Product Price, Product Tax, Shipping, Order Total The criteria for generating the report are Date Range and Product Class (Textbooks for example) The client wants the report to list each Textbook purchased on its own line. Orders with multiple textbooks would display a separate line for each Textbook in the order. I have it all working except for one part: the shipping amount is order-specific (based on the order total), not product-specific, and is displaying for each product. I need it to display only for the first product of each order, so it is not counted more than once. My current query is: SELECT op.date_funds_captured as 'Date', op.orders_id as 'Order ID', pc.class as 'Product Class', round(op.products_price,2) as 'Product Price', round(op.products_tax*op.products_price/100,2) as 'Product Tax', round(otship.value,2) as 'Shipping', round(ot.value,2) as 'Order Total' from orders_products op, orders_total ot, orders_total otship, productclasses pc, products p where ot.orders_id = op.orders_id and ot.class='ot_total' and op.orders_id = otship.orders_id and otship.class = 'ot_shipping' and p.products_class_id = pc.id and op.products_id = p.products_id and pc.id = 1 pc.id = 1 -- Product class = Textbook Here is an example of the current report output. You can see the problem with order 2256 showing the shipping value three times instead of once: Date Order Product Class Price Tax Shipping Total 2010-01-04 2253 Textbook 24.95 2.43 10.03 37.41 2010-01-04 2256 Textbook 34.95 0.00 18.09 240.37 2010-01-04 2256 Textbook 55.50 0.00 18.09 240.37 2010-01-04 2256 Textbook 36.95 0.00 18.09 240.37 2010-01-04 2258 Textbook 55.50 5.41 12.17 124.24 Please help!!! Thanks, Paul

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  • LINQ to remove duplicated property

    - by Shawn Mclean
    I have a LINQ statement like this: var media = (from p in postService.GetMedia(postId) select new { PostId = postId, SynthId = p.SynthId }); There are many(possibly thousands) of records returned with the same SynthId. I want to select one one, any random one. So when I'm finished, media should contain records with distinct SynthId. SynthId can be null, I want all nulls to be in media (the distinct should not affect them). My DAL is EntityFramework, if that will help. How do I accomplish this in the most efficient way?

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  • ASP.NET MVC and F# Service

    - by Shawn Mclean
    My solution is split into 3 projects. Model, Services and Web. In my Service project, I'd like to use some F# features in it. Is it possible to add mix both F# and C# files in that project (a library[.dll])? If not possible, whats the best way to use 2 separate service projects, one for C# and one for F# and how would I structure these projects?

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  • IE performance issues with offsetHeight and offsetWidth

    - by Paul
    I have a site that grabs the response text from an AJAX call and does 'innerHTML' on a div that is going to contain it. After I do the 'innerHTML' I process the DIV by traversing the whole hierarchy of nodes and grabbing their [offsetWidth/offsetHeight] to do some operations with it. Why not css style width/height? because sometimes those values are not available since I don't control what is coming from the AJAX response, plus I want the real box dimensions including borders/scrolls/padding. On large injections (let's say 7,000 new DOM elements) IE takes way longer time than FF/Safari just to get this [offsetWidth/offsetHeight], actually if I wasn't doing injection but just render the contents of the HTML in the browser and processing it, it would be much faster. But that is not an option since I have to inject it on a div that will contain it. Anybody has deal with this kind of issue before? is there an alternative to innerHTML, I have try using documentFragment to inject and process and the move it to the div and still I don't see much gain. How can I get the values that are available with [offsetWidth/offsetHeight]? Thanks a bunch for any suggestions. Paul

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  • c# copy constructor generator

    - by Shawn Mclean
    I want to copy values from one object to another object. Something similiar to pass by value but with assignment. Eg. PushPin newValPushPin = oldPushPin; //I want to break the reference here. I was told to write a copy constructor for this. But this class has alot of properties, it will probably take an hour to write a copy constructor by hand. Is there a better way to assign an object to another object by value? If not, is there a copy constructor generator?

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  • Handling over-long UTF-8 sequences

    - by Grant McLean
    I've just been reworking my Encoding::FixLatin Perl module to handle over-long utf8 byte sequences and convert them to the shortest normal form. My question is quite simply "is this a bad idea"? A number of sources (including this RFC) suggest that any over-long utf8 should be treated as an error and rejected. They caution against "naive implementations" and leave me with the impression that these things are inherently unsafe. Since the whole purpose of my module is to clean up messy data files with mixed encodings and convert them to nice clean utf8, this seems like just one more thing I can clean up so the application layer doesn't have to deal with it. My code does not concern itself with any semantic meaning the resulting characters might have, it simply converts them into a normalised form. Am I missing something. Is there a hidden danger I haven't considered?

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  • Return an Oracle Associative Array from a function

    - by Paul Johnson
    Does anybody know if it is possible to return an associative array as the result of an Oracle function, if so do you have any examples? I have an Oracle package which contains an associative array declaration as defined below: TYPE EVENTPARAM IS TABLE OF NUMBER INDEX BY BINARY_INTEGER; This is then used in a stored procedure outside the package as follows: v_CompParams areva_interface.eventparam; The intention is to store an associative array of strings in the variable v_CompParams, returned from a Parse function in another package. The definition for which is as follows: PACKAGE STRING_MANIP IS TYPE a_array IS TABLE OF NUMBER INDEX BY BINARY_INTEGER; FUNCTION Parse (v_string VARCHAR2, v_delim VARCHAR2) RETURN a_array; FUNCTION RowCount(colln IN a_array) RETURN NUMBER; END; The code which implements this is: v_CompParams := STRING_MANIP.PARSE(v_CompID,v_Delim); Unfortunately it doesn't work, I get the error 'PLS-00382: expression is of wrong type'. I foolishly assumed, that since a_array derives from the same source Oracle type as the variable v_CompParams, that there would be no problem casting between them. Any help much appreciated. Kind Regards Paul J.

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  • How to query JDO persistent objects in unowned relationship model?

    - by Paul B
    Hello, I'm trying to migrate my app from PHP and RDBMS (MySQL) to Google App Engine and have a hard time figuring out data model and relationships in JDO. In my current app I use a lot of JOIN queries like: SELECT users.name, comments.comment FROM users, comments WHERE users.user_id = comments.user_id AND users.email = '[email protected]' As I understand, JOIN queries are not supported in this way so the only(?) way to store data is using unowned relationships and "foreign" keys. There is a documentation regarding that, but no useful examples. So far I have something like this: @PersistenceCapable public class Users {     @PrimaryKey     @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)     private Key key;     @Persistent     private String name;         @Persistent     private String email;         @Persistent     private Set<Key> commentKeys;     // Accessors... } @PersistenceCapable public class Comments {     @PrimaryKey     @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)     private Key key;     @Persistent     private String comment;         @Persistent     private Date commentDate;     @Persistent     private Key userKey;     // Accessors... } So, how do I get a list with commenter's name, comment and date in one query? I see how I probably could get away with 3 queries but that seems wrong and would create unnecessary overhead. Please, help me out with some code examples. -- Paul.

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  • VS debugging and watching a variable for changes

    - by Shawn Mclean
    I have a property inside a class that is getting changed by something. The only place I change the value of this code is a line that looks like this: pushpin.Position.Altitude = -31; During visual studio debugging, is there a way to watch .Altitude for any changes made, preferably it breaks at the assignment statement that changes the value. If this is the correct way to track down this problem, could I have a step-by-step tutorial/instruction on how to do this? Thanks.

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  • Override asbolute position on child container (modal window)

    - by Shawn Mclean
    I have a modal window that is pulled from the server and inserted into a container that is absolute positioned. When that window is triggered to open, it does not display properly, it positions itself inside the container and most of it is hidden. Is there a specific css to be written for the container of the modal window (MyModalWindow). My code is as follows: <div style="position:relative;"> <div style="position: absolute;"> <div id="MyModalWindow"> </div> </div> </div> This is a jquery tools window.

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  • Add child to existing parent record in entity framework.

    - by Shawn Mclean
    My relationship between the parent and child is that they are connected by an edge. It is similiar to a directed graph structure. DAL: public void SaveResource(Resource resource) { context.AddToResources(resource); //Should also add children. context.SaveChanges(); } public Resource GetResource(int resourceId) { var resource = (from r in context.Resources .Include("ToEdges").Include("FromEdges") where r.ResourceId == resourceId select r).SingleOrDefault(); return resource; } Service: public void AddChildResource(int parentResourceId, Resource childResource) { Resource parentResource = repository.GetResource(parentResourceId); ResourceEdge inEdge = new ResourceEdge(); inEdge.ToResource = childResource; parentResource.ToEdges.Add(inEdge); repository.SaveResource(parentResource); } Error: An object with the same key already exists in the ObjectStateManager. The existing object is in the Unchanged state. An object can only be added to the ObjectStateManager again if it is in the added state. Image: I have been told this is the sequence in submitting a child to an already existing parent: Get parent - Attach Child to parent - submit parent. That is the sequence I used. The code above is extracted from an ASP.NET MVC 2 application using the repository pattern.

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  • Override absolute position on child container (modal window)

    - by Shawn Mclean
    I have a modal window that is pulled from the server and inserted into a container that is absolute positioned. When that window is triggered to open, it does not display properly, it positions itself inside the container and most of it is hidden. Is there a specific css to be written for the container of the modal window (MyModalWindow). My code is as follows: <div style="position:relative;"> <div style="position: absolute;"> <div id="MyModalWindow"> </div> </div> </div> This is a jquery tools window and attaches the following style to MyModalWindow when it shows.: element.style { display:block; left:183.5px position:absolute; top:468.4px; z-index:9999; } I basically need the div to not be a child of the parent, since as jquery calculates it to be positioned at the center of the webpage no matter where the div is.

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