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  • Network communication for a turn based board game

    - by randooom
    Hi all, my first question here, so please don't be to harsh if something went wrong :) I'm currently a CS student (from Germany, if this info is of any use ;) ) and we got a, free selectable, programming assignment, which we have to write in a C++/CLI Windows Forms Application. My team, two others and me, decided to go for a network-compatible port of the board game Risk. We divided the work in 3 Parts, namely UI, game logic and network. Now we're on the part where we have to get everything working together and the big question mark is, how to get the clients synchronized with each other? Our approach so far is, that each client has all information necessary to calculate and/or execute all possible actions. Actually the clients have all information available at all, aside from the game-initializing phase (add players, select map, etc.), which needs one "super-client" with some extra stuff to control things. This is the standard scenario of our approach: player performs action, the action is valid and got executed on the players client action is sent over the network action is executed on the other clients The design (i.e. no or code so far) we came up with so far, is something like the following pseudo sequence diagram. Gui, Controller and Network implement all possible actions (i.e. all actions which change data) as methods from an interface. So each part can implement the method in a way to get their job done. Example with Action(): On the player side's Client: Player-->Gui.Action() Gui-->Controller.Action() Controller-->Logic.Action (Logic.Action() == NoError)? Controller-->Network.Action() Network-->Parser.ParseAction() Network.Send(msg) On all other clients: Network.Recv(msg) Network-->Parser.Deparse(msg) Parser-->Logic.Action() Logic-->Gui.Action() The questions: Is this a viable approach to our task? Any better/easier way to this? Recommendations, critique? Our knowledge (so you can better target your answer): We are on the beginner side, in regards to programming on a somewhat larger projects with a small team. All of us have some general programming experience and basic understanding of the .Net Libraries and Windows Forms. If you need any further information, please feel free to ask.

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  • Is it possible to export/import product categories in Magento?

    - by Chris Schmitz
    I saw one other question on how to do a mass import of products, categories, and all that, but all I want to be able to do is import my categories from one store to another. When you export products I see that there is still a category ID attribute that it gives the products, but I don't see any options for exporting product categories. I assume the simplest way would be to just copy over the tables with SQL, but when I export/import through phpMyAdmin it never works.... Any ideas? Thanks, Chris

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  • va_list crash bug from hell

    - by Jonas Byström
    I'm getting crashes due to memory overwrites (possibly within STLport) running on Darwin. Totally out of ideas, what to do? (Added this question so no-one else would run into the same trap without finding a viable answer.)

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  • json KeyError with json.loads

    - by user322775
    my apologies in advance for a python and json nubie question. json seems to be hiccuping on the following statements: {"delete":{"status":{"id":12600579001,"user_id":55389449}}} code snippet: temp = json.loads(line) text = temp['text'] I get the following error output when the above code snippet encounters lines similar to the above json 'dictionary': text = temp['text'] KeyError: 'text' Is it because there is no "text" key in the line or because "delete" is not in the dictionary?

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  • How to write this Linq SQL as a Dynamic Query (using strings)?

    - by Dr. Zim
    Skip to the "specific question" as needed. Some background: The scenario: I have a set of products with a "drill down" filter (Query Object) populated with DDLs. Each progressive DDL selection will further limit the product list as well as what options are left for the DDLs. For example, selecting a hammer out of tools limits the Product Sizes to only show hammer sizes. Current setup: I created a query object, sent it to a repository, and fed each option to a SQL "table valued function" where null values represent "get all products". I consider this a good effort, but far from DDD acceptable. I want to avoid any "programming" in SQL, hopefully doing everything with a repository. Comments on this topic would be appreciated. Specific question: How would I rewrite this query as a Dynamic Query? A link to something like 101 Linq Examples would be fantastic, but with a Dynamic Query scope. I really want to pass to this method the field in quotes "" for which I want a list of options and how many products have that option. from p in db.Products group p by p.ProductSize into g select new Category { PropertyType = g.Key, Count = g.Count() } Each DDL option will have "The selection (21)" where the (21) is the quantity of products that have that attribute. Upon selecting an option, all other remaining DDLs will update with the remaining options and counts. Edit: Additional notes: .OrderBy("it.City") // "it" refers to the entire record .GroupBy("City", "new(City)") // This produces a unique list of City .Select("it.Count()") //This gives a list of counts... getting closer .Select("key") // Selects a list of unique City .Select("new (key, count() as string)") // +1 to me LOL. key is a row of group .GroupBy("new (City, Manufacturer)", "City") // New = list of fields to group by .GroupBy("City", "new (Manufacturer, Size)") // Second parameter is a projection Product .Where("ProductType == @0", "Maps") .GroupBy("new(City)", "new ( null as string)")// Projection not available later? .Select("new (key.City, it.count() as string)")// GroupBy new makes key an object Product .Where("ProductType == @0", "Maps") .GroupBy("new(City)", "new ( null as string)")// Projection not available later? .Select("new (key.City, it as object)")// the it object is the result of GroupBy var a = Product .Where("ProductType == @0", "Maps") .GroupBy("@0", "it", "City") // This fails to group Product at all .Select("new ( Key, it as Product )"); // "it" is property cast though What I have learned so far is LinqPad is fantastic, but still looking for an answer. Eventually, completely random research like this will prevail I guess. LOL. Edit:

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  • How can I obtain raw data from a CVImageBuffer object.

    - by jslap
    Hi, I'm trying to use cocoa to grab images from a webcam. I'm able to get the image in RGBA format using the QTKit and the didOutputVideoFrame delegate call, and converting the CVImageBuffer to a CIImage and then to a NSBitmapImageRep. I know my camera grabs natively in YUV, what I want is to get the YUV data directly from the CVImageBuffer, and proccess the YUV frame before displaying it. My question is: How can I get the YUV data from the CVImageBuffer? thanks.

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  • WPF Applying a trigger on binding failure

    - by Aran Mulholland
    This question is a follow on from this one... I am binding to a heterogeneous collection of objects, not all objects have the same set of properties. I am doing this in a datagrid. I would like to gray out the cell if the binding fails. Is there a way to apply a trigger if a binding fails?

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  • What is a columnar database?

    - by Raj More
    I have been working with warehousing for a while now. I am intrigued by Columnar Databases and the speed that they have to offer for data retrievals. I have multi-part question: How do Columnar Databases work? How do they differ from relational databases? Is there a trial version of a columnar database I can install to play around? (I am on Windows 7)

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  • Can I use mono's AOT feature to natively "pre-compile" .NET DLLs/EXEs to make them harder to reverse

    - by Jared Updike
    Can I use mono's AOT (Ahead of Time compilation) feature to natively "pre-compile" all or part of some of my own .NET DLLs (and or EXEs) to make them harder to reverse engineer? I'm using Windows (7 / x64 but I have an x86 XP machine as well) and .NET 3.5 (VS 2008) and I'm curious if mono/AOT can be/has been used for this purpose? (Tying them to x86 is acceptable at this point.) See also this question where I tried this and had no luck.

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  • What does get-task-allow do in Xcode?

    - by Mr. Matt
    So when I set up my entitlements in my iPhone app project, I create a new Entitlements.plist, and set the value of get-task-allow to false. But why? What does this key represent? EDIT Note this is related to this question - I found that flipping the value of this key to true allowed me to install the app on my device)

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  • Peer review maatkits mk-parallel-dump and mk-parallel-restore usage?

    - by Brent
    Hiya Im trying to make use of maatkit as a means of dumping a database and then restoring to another database. For dumps: mk-parallel-dump --user abc --password xyz --databases $db --base-dir /tmp/dump For restore: mk-parallel-restore --create-databases --user abc --password xyz --database devdb /tmp/dump My question is, is my logic and understanding correct, and would it be ok to do it like this. Kind Regards Brent

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  • PHP analog of mysql like function

    - by DCrystal
    Suppose it's a nub question, but is there an analog of mysql's LIKE function in php? So, e.g. : like('goo*','google.com');//is true like('*gl*','google.com');//true like('google.com','google.com')//also true I know regex rullez, but don't know any solution to reach this

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  • Get text of button from IBAction - iPhone

    - by Organiccat
    When an IBAction is called: -(IBAction) onClick1: (id) sender; What is passed in the sender? Since it's hooked up through the IB, I'm not really sure. My question is how to get the text of the button to be the passed object (NSString most likely) so that I could call it inside the action implementation. -(IBAction) onClick1: (id) sender { NSLog(@"User clicked %@", sender); // Do something here with the variable 'sender' }

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  • First order logic formula

    - by user177883
    R(x) is a red block B(x) is a blue block T(x,y) block x is on top of block y Question: Write a formula asserting that if no red block is on top of a red block then no red block is on top of itself. My answer: (Ax)(Ay)(R(x) and R(y) - ~T(x,y))-(Ax)(R(x)- ~T(x,x)) A = For all

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  • sqlite over network share for failover

    - by reinier
    As a follow-up of this question: sqlite-over-a-network-share If I put the SQlite DB on a network share, but will not access it concurrently from different machines. I only have the SQLite db stored on a share so a cluster of failover computers can take over where one machine left off. Are there any inherent problems with that approach?

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  • php object : get value of attribute by computed name

    - by groovehunter
    hi simple question - How do I access an attribute of an object by name, if i compute the name at runtime? Ie. i loop over keys and want to get each value of the attributes "field_".$key In python there is getattribute(myobject, attrname) It works, of course, with eval("$val=$myobject-".$myattr.";"); but IMO this is ugly!! TIA florian

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  • JavaScript: Doing some stuff right before the user exits the page

    - by Mike
    I have seen some questions here regarding what I want to achieve and have based what I have so far on those answer. But there is a slight misbehavior that is still irritating me. What I have is sort of a recovery feature. Whenever you are typing text, the client sends a sync request to the server every 45 seconds. It does 2 things. First, it extends the lease the client has on the record (only one person may edit at one time) for another 60 seconds. Second, it sends the text typed so far to the server in case the server crashes, internet connection fails, etc. In that case, the next time the user enters our application, the user is notified that something has gone wrong and that some text was recovered. Think of Microsoft or OpenOffice recovery whenever they crash! Of course, if the user leaves the page willingly, the user does not need to be notified and as a result, the recovery is deleted. I do that final request via a beforeunload event. Everything went fine until I was asked to make a final adjustment... The same behavior you have here at stack overflow when you exit the editor... a confirm dialogue. This works so far, BUT, the confirm dialogue is shown twice. Here is the code. The event if (local.sync.autosave_textelement) { window.onbeforeunload = exitConfirm; } The function function exitConfirm() { var local = Core; if (confirm('blub?')) { local.sync.autosave_destroy = true; sync(false); return true; } else { return false; } }; Some problem irrelevant clarifications: Core is a global Object that contains a lot of variables that are used everywhere. sync makes an ajax request. The values are based on the values that the Core.sync object contains. The parameter determines if the call should be async (default) or sync.

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  • Configuring Eclipse with wxPython

    - by Alex
    Hi, I've been browsing documentation, but haven't been able to find a straightforward tutorial, so I apologize if this is a really simple question. Anyway, I have eclipse with pydev installed on MAC OSX, and I want configure wxPython to work with eclipse, how do I do this? Once I've downloaded wxpython, what steps do I take to allow wxPython development from eclipse? Thanks!

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  • use Data Annotation to my Linq to SQL

    - by Khalid Omar
    i have a mvc web project and i'm using linq to sql i'm using dataannotaion like this public class ClientValidation { [Required] public string name1st { get; set; } } then in the linq class i add that above client class [global::System.Data.Linq.Mapping.TableAttribute(Name = "dbo.Client")] [MetadataType(typeof(ClientValidation))] public partial class Client : INotifyPropertyChanging, INotifyPropertyChanged { } every thing is going ok the question is when i re generate the linq when i add table or change any thing in database i need to rewrite [MetadataType(typeof(ClientValidation))] is there any other method to enable me regenerate the model and keep the data annotation as it

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  • Qt Program depoly to multi platform, how?

    - by coderex
    Hi, Am new in Qt Programming and i would like to develop a program which i want to run in Windows, Linux(ubuntu), and Mac. I heard that Qt support mutli-platform application development, but my Question is that, would any Qt library need to run these appilication in Ubuntu after i depolyed or compiled. Or

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  • Rails 3 Processing by */*

    - by Maestro
    I have noticed that in Rails 3.2.2, all actions are being processed with */* format. So the question is: what means */* ? And why it is called by default (every time) ? Because there are two processings for one action: Started GET "/" for 127.0.0.1 at 2012-07-07 22:50:22 +0200 Processing by MainController#index as HTML Started GET "/" for 127.0.0.1 at 2012-07-07 22:50:22 +0200 Processing by MainController#index as */* I have tried to set: respond_to :html def index @posts = Post.all respond_with(@posts) end But the same problem still exists.

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