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  • Most Efficient way to deal with multiple CCSprites?

    - by nardsurfer
    I have four different types of objects within my environment(box2d), each type of object having multiple instances of itself, and would like to find the most efficient way to deal with adding and manipulating all the CCSprites. The sprites are all from different files, so would it be best to create each sprite and add it to a data structure (NSMutableArray) or would I use a CCSpriteBatchNode even though each CCSprite file is different (for each type of object)? Thanks. @interface LevelScene : CCLayer { b2World* world; GLESDebugDraw *m_debugDraw; CCSpriteBatchNode *ballBatch; CCSpriteBatchNode *blockBatch; CCSpriteBatchNode *springBatch; CCSprite *goal; } +(id) scene; // adds a new sprite at a given coordinate -(void) addNewBallWithCoords:(CGPoint)p; // loads the objects (blocks, springs, and the goal), returns the Level Object -(Level) loadLevel:(int)level; @end or using NSMutableArray objects within the Level object... @interface zLevel : zThing { NSMutableArray *springs; NSMutableArray *blocks; NSMutableArray *balls; zGoal *goal; int levelNumber; } @property(nonatomic,retain)NSMutableArray *springs; @property(nonatomic,retain)NSMutableArray *blocks; @property(nonatomic,retain)NSMutableArray *balls; @property(nonatomic,retain)zGoal *goal; @property(nonatomic,assign)int levelNumber; -(void)initWithLevel:(int)level; -(void)loadLevelThings; @end

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  • how to determine when two NSDates are 1 week apart?

    - by cgossain
    I'm my app I have an NSMutableArray, and each entry has an NSMutableDictionary with several Key-Value pairs. One of these pairs contains the date of the entry. For one of the functions of my app I need to determine which entries are exactly 1 week apart from each other (i.e from Sunday to Saturday) and sum the data from one of the Key-Value pairs for each day of that week. How should I go about doing this?

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  • cocoa - I've discovered what I think is a bug with double numbers...

    - by Mike
    Here is a simple code that shows what I think is a bug when dealing with double numbers... double wtf = 36.76662445068359375000; id xxx = [NSDecimalNumber numberWithDouble: wtf]; NSString *myBug = [xxx stringValue]; NSLog(@"%.20f", wtf); NSLog(@"%@", myBug); NSLog(@"-------\n"); the terminal will show two different numbers 36.76662445068359375000 and 36.76662445068359168 Is this a bug or am I missing something? if the second number is being rounded, it is a very strange rounding btw...

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  • iPhone Open GL ES using FBX - How do I import animations from FBX into iPhone?

    - by Dominic Tancredi
    I've been researching this extensively. We have a game that's 90% complete, using custom game logic in iPhone 4.0. We've been asked to import a 3D model and have it animate when various events happen in the game. I've put together an OpenGL view (based on Eagl and several examples), and used Blender to import the model, as well as Jeff LeMarche's script to export the .h file. After much trial, it worked, and I was able to show a rotating model (unskinned). However, the 3d artist hadn't UV unwrapped the model, so provided me a new model, this one as a Maya file, along with animation in a FBX format, a .obj file, and .tga texture unwrapped. My question is : how can I use FBX inside OpenGL ES inside iPhone to run through animations? And what's the pipeline to get this Maya file into Blender to be able to create a .h file. I've tried the obj2opengl however the model is missing normals (did it have it in the first place?) and the skin isn't applying at all (possibly a code issue, something I think I can fix). I'm trying to use Jeff LeMarche's animation tutorial but can't figure out how to get the model files into a proper .h file for use. Any advice?

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  • iPhone/iPad: Get Alerts When Paid Apps Go Free

    - by Gopinath
    iPhone users has thousands of cool applications to choose. These apps are either paid or absolutely free. Many of the paid applications goes free for either a limited time or forever depending on the mood of their developers. Will it not be cool to get alerts whenever a paid app goes free? Yeah, it will be great. Free App Alert is a handy website that checks iTunes store regularly and sends alerts to it’s subscribers about the apps that have gone from paid to free. You can receive the alerts by following them on twitter, facebook or subscribing to the traditional RSS feeds(yeah RSS is a traditional technology). The home page of this website shows the apps that have gone free today and you can browse through the previous day free apps listing with the help of links available at the bottom. Free App Alert is definitely a cool site to check out for iPhone/iPod/iPad users and certainly easier than scrolling through iTunes store and checking prices. Tip: Immediately download the app that have gone from paid to free as many apps are free for limited time. You can see many free apps going back to paid version if you go through the previous pages the website. Join us on Facebook to read all our stories right inside your Facebook news feed.

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  • Player sprite moving slower on iPhone 4

    - by nvillec
    I just finished getting movement/jump animation for a player sprite in Xcode using Cocos2D. The basic movement algorithm is a timer that updates every 0.01 sec, changing the sprite position to (sprite.position.x + xVel, sprite.position.y + yVel). Each time a movement button is tapped, the appropriate velocity (initialized to 0) is changed to whatever speed I choose, then a stop movement button returns the velocity to 0. It's not an ideal solution but I'm very new at this and stoked to at least have that working with little help from the internet. So I may not have explained that perfectly, but it is in fact working to my satisfaction in Xcode's iPhone Simulator, however when I build it for my device and run it on my phone, the sprite's movement speed is noticeably slower than in Xcode. At first I thought it must have to do with the resolution of the iPhone 4, making the sprite's movement path twice as long, but I found that if I pull up the multitask bar, then return to the app the speed will sometimes jump back to normal. My second theory was that the code is just inefficient and is bogging the processes down, but I would see this reflected in the frame rate wouldn't I? It stays at 59-60 the whole time, and the spritesheet animation runs at the correct speed. Has anyone experienced this? Is this a really obvious issue that I'm completely missing? Any help (or tips for optimizing my approach to movement) would be much appreciated!

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  • Creating new games on Android and/or iPhone

    - by James Clifton
    I have a succesfull facebook poker game that is running very nicely, now some people have asked if I can port this to other platforms - mainly mobile devices (and I have been asked to make a tablet version, do I really need a seperate version?) I am currently a PHP programmer (and game designer) and I simply dont' have the time to learn Android and other languages - so I have decided to pay third parties to program them (if viable). The information I need to know is what programming language is needed for the following four devices - Android mobile phone, iPhone, iPad and tablets? Can they all run off a central sql database? If they can't then i'm not interested :( Do any of these run FLASH? Have I covered all my main bases here? For example if a person programs for a ANDROID mobile phone is that to much differant to an ANDROID tablet? They will have slightly differant graphics (because the tablet has a greater screen area might as well use it) but do they need to be started from scratch? Same goes for iPhone/iPad, do they really need to be programmed differantly if the only differance is the graphics?

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  • iPhone SDK background thread image loading problem

    - by retailevolved
    I have created a grid view that displays six "cells" of content. In each cell, an image is loaded from the web. There are a multiple pages of this grid (the user moves through them by swiping up / down to see the next set of cells). Each cell has its own view controller. When these view controllers load, they use an ImageLoader class that I made to load and display an image. These view controllers implement an ImageLoaderDelegate that has a single method that gets called when the image is finished loading. ImageLoader does its work on a background thread and then simply notifies its delegate when it is done loading, passing the image to the delegate method. Trouble is that if the user moves on to the next page of grid content before the image has finished loading (releasing the GridCellViewControllers that use the ImageLoaders), the app crashes. I suspect that this is because along the line, an asynchronous method finishes and attempts to notify its delegate but can't because it's been released. Here's some code to give a better picture: GridCellViewController.m: - (void)viewDidLoad { [super viewDidLoad]; // ImageLoader _loader = [[ProductImageLoader alloc] init]; _loader.delegate = self; if(_boundObject) [_loader loadImageForProduct:_boundObject]; } //ImageLoaderDelegate method - (void) imageDidFinishLoading: (UIImage *)image { [_imgController setImage:image]; } ProductImageLoader.m - (void) loadImageForProduct: (Product *) product { // Get image on another thread [NSThread detachNewThreadSelector:@selector(getImageForProductInBackground:) toTarget:self withObject:product]; } - (void) getImageForProductInBackground: (Product *) product { NSAutoreleasePool *tempPool = [[NSAutoreleasePool alloc] init]; HttpRequestLoader *tempLoader = [[HttpRequestLoader alloc] init]; NSURL *tempUrl = [product getImageUrl]; NSData *imageData = tempUrl ? [tempLoader loadSynchronousDataFromAddress:[tempUrl absoluteString]] : nil; UIImage *image = [[UIImage alloc] initWithData:imageData]; [tempPool release]; if(delegate) [delegate imageDidFinishLoading:image]; } The app crashes with EXC_BAD_ACCESS. Disclaimer: The code has been slightly modified to focus on the issue at hand.

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  • Web.Config is Cached

    - by SGWellens
    There was a question from a student over on the Asp.Net forums about improving site performance. The concern was that every time an app setting was read from the Web.Config file, the disk would be accessed. With many app settings and many users, it was believed performance would suffer. Their intent was to create a class to hold all the settings, instantiate it and fill it from the Web.Config file on startup. Then, all the settings would be in RAM. I knew this was not correct and didn't want to just say so without any corroboration, so I did some searching. Surprisingly, this is a common misconception. I found other code postings that cached the app settings from Web.Config. Many people even thanked the posters for the code. In a later post, the student said their text book recommended caching the Web.Config file. OK, here's the deal. The Web.Config file is already cached. You do not need to re-cache it. From this article http://msdn.microsoft.com/en-us/library/aa478432.aspx It is important to realize that the entire <appSettings> section is read, parsed, and cached the first time we retrieve a setting value. From that point forward, all requests for setting values come from an in-memory cache, so access is quite fast and doesn't incur any subsequent overhead for accessing the file or parsing the XML. The reason the misconception is prevalent may be because it's hard to search for Web.Config and cache without getting a lot of hits on how to setup caching in the Web.Config file. So here's a string for search engines to index on: "Is the Web.Config file Cached?" A follow up question was, are the connection strings cached? Yes. http://msdn.microsoft.com/en-us/library/ms178683.aspx At run time, ASP.NET uses the Web.Config files to hierarchically compute a unique collection of configuration settings for each incoming URL request. These settings are calculated only once and then cached on the server. And, as everyone should know, if you modify the Web.Config file, the web application will restart. I hope this helps people to NOT write code! Steve WellensCodeProject

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  • Web.Config is Cached

    - by SGWellens
    There was a question from a student over on the Asp.Net forums about improving site performance. The concern was that every time an app setting was read from the Web.Config file, the disk would be accessed. With many app settings and many users, it was believed performance would suffer. Their intent was to create a class to hold all the settings, instantiate it and fill it from the Web.Config file on startup. Then, all the settings would be in RAM. I knew this was not correct and didn't want to just say so without any corroboration, so I did some searching. Surprisingly, this is a common misconception. I found other code postings that cached the app settings from Web.Config. Many people even thanked the posters for the code. In a later post, the student said their text book recommended caching the Web.Config file. OK, here's the deal. The Web.Config file is already cached. You do not need to re-cache it. From this article http://msdn.microsoft.com/en-us/library/aa478432.aspx It is important to realize that the entire <appSettings> section is read, parsed, and cached the first time we retrieve a setting value. From that point forward, all requests for setting values come from an in-memory cache, so access is quite fast and doesn't incur any subsequent overhead for accessing the file or parsing the XML. The reason the misconception is prevalent may be because it's hard to search for Web.Config and cache without getting a lot of hits on how to setup caching in the Web.Config file. So here's a string for search engines to index on: "Is the Web.Config file Cached?" A follow up question was, are the connection strings cached? Yes. http://msdn.microsoft.com/en-us/library/ms178683.aspx At run time, ASP.NET uses the Web.Config files to hierarchically compute a unique collection of configuration settings for each incoming URL request. These settings are calculated only once and then cached on the server. And, as everyone should know, if you modify the Web.Config file, the web application will restart. I hope this helps people to NOT write code!   Steve WellensCodeProject

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  • I'm creating my own scalable, rapid prototyping web server. How should I design it?

    - by Mike Willliams
    I'm going to create my own web server that focuses on scalability, rapid prototyping and the use of JavaScript as the server's scripting language, much like node.js. It will use a Model-View-Controller design pattern so a web application can support more concurrent users just by adding hardware -- and not having to redesign the software. Basically, I'm aiming to produce a framework that allows for fast and easy development of cloud applications without the need to write lots of boiler plate code. I've got some questions about this... How hard will it be to put MySQL in the cloud? How could I go about implementing this and make the resulting product free? Will I have to write my own engine or modify an existing one, if I do what should I watch out for? To make this scalable I need to adjust from one server to hundreds of servers this creates the requirement for the servers to be load balancing, how should I do this? If I balance based on the work load per server I would need gateway to handle all the incoming requests. Is it the right idea to have all the servers check into the gateway and update there status. By having the servers run through a gateway if the gateway dies all the incoming requests are ignored. I'm thinking that having all the servers maintain a list of each other, or at least a few I could rebuild the list of servers and establish a new gateway. Is it worth it? Or should I have a backup gateway that could switch out? Should I let the user choose? How should I pick which server handles the database and which handles the page serving? Should I spread the database so that queries are preformed on multiple servers? Which would theoretically improve performance. The servers would need to mirror the database at least once so that if a server goes down the database isn't corrupted. So this brings up writing another question, should I broadcast SQL queries so that all the servers can take a bit of the work load? If I do it that way wouldn't a query clog up the network so that other queries couldn't be preformed? What are my alternatives? Finally, is there a free solution already out there that might need a little modification that suits my needs?

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  • Using an alternate JSON Serializer in ASP.NET Web API

    - by Rick Strahl
    The new ASP.NET Web API that Microsoft released alongside MVC 4.0 Beta last week is a great framework for building REST and AJAX APIs. I've been working with it for quite a while now and I really like the way it works and the complete set of features it provides 'in the box'. It's about time that Microsoft gets a decent API for building generic HTTP endpoints into the framework. DataContractJsonSerializer sucks As nice as Web API's overall design is one thing still sucks: The built-in JSON Serialization uses the DataContractJsonSerializer which is just too limiting for many scenarios. The biggest issues I have with it are: No support for untyped values (object, dynamic, Anonymous Types) MS AJAX style Date Formatting Ugly serialization formats for types like Dictionaries To me the most serious issue is dealing with serialization of untyped objects. I have number of applications with AJAX front ends that dynamically reformat data from business objects to fit a specific message format that certain UI components require. The most common scenario I have there are IEnumerable query results from a database with fields from the result set rearranged to fit the sometimes unconventional formats required for the UI components (like jqGrid for example). Creating custom types to fit these messages seems like overkill and projections using Linq makes this much easier to code up. Alas DataContractJsonSerializer doesn't support it. Neither does DataContractSerializer for XML output for that matter. What this means is that you can't do stuff like this in Web API out of the box:public object GetAnonymousType() { return new { name = "Rick", company = "West Wind", entered= DateTime.Now }; } Basically anything that doesn't have an explicit type DataContractJsonSerializer will not let you return. FWIW, the same is true for XmlSerializer which also doesn't work with non-typed values for serialization. The example above is obviously contrived with a hardcoded object graph, but it's not uncommon to get dynamic values returned from queries that have anonymous types for their result projections. Apparently there's a good possibility that Microsoft will ship Json.NET as part of Web API RTM release.  Scott Hanselman confirmed this as a footnote in his JSON Dates post a few days ago. I've heard several other people from Microsoft confirm that Json.NET will be included and be the default JSON serializer, but no details yet in what capacity it will show up. Let's hope it ends up as the default in the box. Meanwhile this post will show you how you can use it today with the beta and get JSON that matches what you should see in the RTM version. What about JsonValue? To be fair Web API DOES include a new JsonValue/JsonObject/JsonArray type that allow you to address some of these scenarios. JsonValue is a new type in the System.Json assembly that can be used to build up an object graph based on a dictionary. It's actually a really cool implementation of a dynamic type that allows you to create an object graph and spit it out to JSON without having to create .NET type first. JsonValue can also receive a JSON string and parse it without having to actually load it into a .NET type (which is something that's been missing in the core framework). This is really useful if you get a JSON result from an arbitrary service and you don't want to explicitly create a mapping type for the data returned. For serialization you can create an object structure on the fly and pass it back as part of an Web API action method like this:public JsonValue GetJsonValue() { dynamic json = new JsonObject(); json.name = "Rick"; json.company = "West Wind"; json.entered = DateTime.Now; dynamic address = new JsonObject(); address.street = "32 Kaiea"; address.zip = "96779"; json.address = address; dynamic phones = new JsonArray(); json.phoneNumbers = phones; dynamic phone = new JsonObject(); phone.type = "Home"; phone.number = "808 123-1233"; phones.Add(phone); phone = new JsonObject(); phone.type = "Home"; phone.number = "808 123-1233"; phones.Add(phone); //var jsonString = json.ToString(); return json; } which produces the following output (formatted here for easier reading):{ name: "rick", company: "West Wind", entered: "2012-03-08T15:33:19.673-10:00", address: { street: "32 Kaiea", zip: "96779" }, phoneNumbers: [ { type: "Home", number: "808 123-1233" }, { type: "Mobile", number: "808 123-1234" }] } If you need to build a simple JSON type on the fly these types work great. But if you have an existing type - or worse a query result/list that's already formatted JsonValue et al. become a pain to work with. As far as I can see there's no way to just throw an object instance at JsonValue and have it convert into JsonValue dictionary. It's a manual process. Using alternate Serializers in Web API So, currently the default serializer in WebAPI is DataContractJsonSeriaizer and I don't like it. You may not either, but luckily you can swap the serializer fairly easily. If you'd rather use the JavaScriptSerializer built into System.Web.Extensions or Json.NET today, it's not too difficult to create a custom MediaTypeFormatter that uses these serializers and can replace or partially replace the native serializer. Here's a MediaTypeFormatter implementation using the ASP.NET JavaScriptSerializer:using System; using System.Net.Http.Formatting; using System.Threading.Tasks; using System.Web.Script.Serialization; using System.Json; using System.IO; namespace Westwind.Web.WebApi { public class JavaScriptSerializerFormatter : MediaTypeFormatter { public JavaScriptSerializerFormatter() { SupportedMediaTypes.Add(new System.Net.Http.Headers.MediaTypeHeaderValue("application/json")); } protected override bool CanWriteType(Type type) { // don't serialize JsonValue structure use default for that if (type == typeof(JsonValue) || type == typeof(JsonObject) || type== typeof(JsonArray) ) return false; return true; } protected override bool CanReadType(Type type) { if (type == typeof(IKeyValueModel)) return false; return true; } protected override System.Threading.Tasks.Taskobject OnReadFromStreamAsync(Type type, System.IO.Stream stream, System.Net.Http.Headers.HttpContentHeaders contentHeaders, FormatterContext formatterContext) { var task = Taskobject.Factory.StartNew(() = { var ser = new JavaScriptSerializer(); string json; using (var sr = new StreamReader(stream)) { json = sr.ReadToEnd(); sr.Close(); } object val = ser.Deserialize(json,type); return val; }); return task; } protected override System.Threading.Tasks.Task OnWriteToStreamAsync(Type type, object value, System.IO.Stream stream, System.Net.Http.Headers.HttpContentHeaders contentHeaders, FormatterContext formatterContext, System.Net.TransportContext transportContext) { var task = Task.Factory.StartNew( () = { var ser = new JavaScriptSerializer(); var json = ser.Serialize(value); byte[] buf = System.Text.Encoding.Default.GetBytes(json); stream.Write(buf,0,buf.Length); stream.Flush(); }); return task; } } } Formatter implementation is pretty simple: You override 4 methods to tell which types you can handle and then handle the input or output streams to create/parse the JSON data. Note that when creating output you want to take care to still allow JsonValue/JsonObject/JsonArray types to be handled by the default serializer so those objects serialize properly - if you let either JavaScriptSerializer or JSON.NET handle them they'd try to render the dictionaries which is very undesirable. If you'd rather use Json.NET here's the JSON.NET version of the formatter:// this code requires a reference to JSON.NET in your project #if true using System; using System.Net.Http.Formatting; using System.Threading.Tasks; using System.Web.Script.Serialization; using System.Json; using Newtonsoft.Json; using System.IO; using Newtonsoft.Json.Converters; namespace Westwind.Web.WebApi { public class JsonNetFormatter : MediaTypeFormatter { public JsonNetFormatter() { SupportedMediaTypes.Add(new System.Net.Http.Headers.MediaTypeHeaderValue("application/json")); } protected override bool CanWriteType(Type type) { // don't serialize JsonValue structure use default for that if (type == typeof(JsonValue) || type == typeof(JsonObject) || type == typeof(JsonArray)) return false; return true; } protected override bool CanReadType(Type type) { if (type == typeof(IKeyValueModel)) return false; return true; } protected override System.Threading.Tasks.Taskobject OnReadFromStreamAsync(Type type, System.IO.Stream stream, System.Net.Http.Headers.HttpContentHeaders contentHeaders, FormatterContext formatterContext) { var task = Taskobject.Factory.StartNew(() = { var settings = new JsonSerializerSettings() { NullValueHandling = NullValueHandling.Ignore, }; var sr = new StreamReader(stream); var jreader = new JsonTextReader(sr); var ser = new JsonSerializer(); ser.Converters.Add(new IsoDateTimeConverter()); object val = ser.Deserialize(jreader, type); return val; }); return task; } protected override System.Threading.Tasks.Task OnWriteToStreamAsync(Type type, object value, System.IO.Stream stream, System.Net.Http.Headers.HttpContentHeaders contentHeaders, FormatterContext formatterContext, System.Net.TransportContext transportContext) { var task = Task.Factory.StartNew( () = { var settings = new JsonSerializerSettings() { NullValueHandling = NullValueHandling.Ignore, }; string json = JsonConvert.SerializeObject(value, Formatting.Indented, new JsonConverter[1] { new IsoDateTimeConverter() } ); byte[] buf = System.Text.Encoding.Default.GetBytes(json); stream.Write(buf,0,buf.Length); stream.Flush(); }); return task; } } } #endif   One advantage of the Json.NET serializer is that you can specify a few options on how things are formatted and handled. You get null value handling and you can plug in the IsoDateTimeConverter which is nice to product proper ISO dates that I would expect any Json serializer to output these days. Hooking up the Formatters Once you've created the custom formatters you need to enable them for your Web API application. To do this use the GlobalConfiguration.Configuration object and add the formatter to the Formatters collection. Here's what this looks like hooked up from Application_Start in a Web project:protected void Application_Start(object sender, EventArgs e) { // Action based routing (used for RPC calls) RouteTable.Routes.MapHttpRoute( name: "StockApi", routeTemplate: "stocks/{action}/{symbol}", defaults: new { symbol = RouteParameter.Optional, controller = "StockApi" } ); // WebApi Configuration to hook up formatters and message handlers // optional RegisterApis(GlobalConfiguration.Configuration); } public static void RegisterApis(HttpConfiguration config) { // Add JavaScriptSerializer formatter instead - add at top to make default //config.Formatters.Insert(0, new JavaScriptSerializerFormatter()); // Add Json.net formatter - add at the top so it fires first! // This leaves the old one in place so JsonValue/JsonObject/JsonArray still are handled config.Formatters.Insert(0, new JsonNetFormatter()); } One thing to remember here is the GlobalConfiguration object which is Web API's static configuration instance. I think this thing is seriously misnamed given that GlobalConfiguration could stand for anything and so is hard to discover if you don't know what you're looking for. How about WebApiConfiguration or something more descriptive? Anyway, once you know what it is you can use the Formatters collection to insert your custom formatter. Note that I insert my formatter at the top of the list so it takes precedence over the default formatter. I also am not removing the old formatter because I still want JsonValue/JsonObject/JsonArray to be handled by the default serialization mechanism. Since they process in sequence and I exclude processing for these types JsonValue et al. still get properly serialized/deserialized. Summary Currently DataContractJsonSerializer in Web API is a pain, but at least we have the ability with relatively limited effort to replace the MediaTypeFormatter and plug in our own JSON serializer. This is useful for many scenarios - if you have existing client applications that used MVC JsonResult or ASP.NET AJAX results from ASMX AJAX services you can plug in the JavaScript serializer and get exactly the same serializer you used in the past so your results will be the same and don't potentially break clients. JSON serializers do vary a bit in how they serialize some of the more complex types (like Dictionaries and dates for example) and so if you're migrating it might be helpful to ensure your client code doesn't break when you switch to ASP.NET Web API. Going forward it looks like Microsoft is planning on plugging in Json.Net into Web API and make that the default. I think that's an awesome choice since Json.net has been around forever, is fast and easy to use and provides a ton of functionality as part of this great library. I just wish Microsoft would have figured this out sooner instead of now at the last minute integrating with it especially given that Json.Net has a similar set of lower level JSON objects JsonValue/JsonObject etc. which now will end up being duplicated by the native System.Json stuff. It's not like we don't already have enough confusion regarding which JSON serializer to use (JavaScriptSerializer, DataContractJsonSerializer, JsonValue/JsonObject/JsonArray and now Json.net). For years I've been using my own JSON serializer because the built in choices are both limited. However, with an official encorsement of Json.Net I'm happily moving on to use that in my applications. Let's see and hope Microsoft gets this right before ASP.NET Web API goes gold.© Rick Strahl, West Wind Technologies, 2005-2012Posted in Web Api  AJAX  ASP.NET   Tweet !function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); (function() { var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true; po.src = 'https://apis.google.com/js/plusone.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s); })();

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  • How do you manage large web farms?

    - by Andrew Katz
    I have a quickly growing web farm running IIS 7 (30+ servers). All servers are identical copies of each other and all servers are physical. We update the software about once a month, and in the current process, we follow the following steps: Disable server from pool on F5 load balancer. Disable HTTP Keep-alives in IIS so connections drop quickly. Change default directory of website to new folder containing new binaries. Test server Enable HTTP Keep-alives. Enable server in F5 pool. Move to server 2 Microsoft used to have Application Center which was abandoned a while ago. They have made a second attempt with the Web Farm Framework, but this adds as much QA time testing the release package as it saves in the deployment. Has anyone seen a commercial off the shelf application that is tailored for managing and deploying to large web farms? Thanks!

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  • Uploading User Made Videos to iPhone (from Vista)

    - by Darren E.
    Once a user downloads a video created with the iPhone 3GS and then deletes it from the iPhone, that video cannot be uploaded back to the iPhone...according to Apple. The videos are not treated as Photos and are not allowed to sync to and from the iPhone freely. Has anyone discovered a program or tweek that allows one to upload video to the iPhone? Thanks.

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  • iphone app crash, crash log posted, help please

    - by terry jones
    hi, we recenty had a programmer to develop a program for us but seems to have left us in the lurch with a part functioning application. my boss isnt happy at moment as we have spent a few hundred and have nothing to show for it at the moment. can anyone see any information in the crash log below as its gibberish to me. Incident Identifier: D4F482FE-167A-44BB-A642-7E8EF7B568BF CrashReporter Key: 2d8e2d17415c55e48ec20dae7cbe6c36b33bcce1 Process: Logistics [328] Path: /var/mobile/Applications/32A03443-ADE3-4AAE-AB32-05DB7BEB15D8/Logistics.app/Logistics Identifier: Logistics Version: ??? (???) Code Type: ARM (Native) Parent Process: launchd [1] Date/Time: 2010-03-29 17:07:06.474 +0200 OS Version: iPhone OS 3.1.2 (7D11) Report Version: 104 Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x00000000, 0x00000000 Crashed Thread: 0 Thread 0 Crashed: 0 libSystem.B.dylib 0x31a279ac 0x319a9000 + 518572 1 libSystem.B.dylib 0x31a2799c 0x319a9000 + 518556 2 libSystem.B.dylib 0x31a2798e 0x319a9000 + 518542 3 libSystem.B.dylib 0x31a3c63a 0x319a9000 + 603706 4 libstdc++.6.dylib 0x3361d3b0 0x335d8000 + 283568 5 libobjc.A.dylib 0x32401858 0x323fc000 + 22616 6 libstdc++.6.dylib 0x3361b776 0x335d8000 + 276342 7 libstdc++.6.dylib 0x3361b7ca 0x335d8000 + 276426 8 libstdc++.6.dylib 0x3361b896 0x335d8000 + 276630 9 libobjc.A.dylib 0x32400714 0x323fc000 + 18196 10 CoreFoundation 0x32537b86 0x32511000 + 158598 11 CoreFoundation 0x32537b24 0x32511000 + 158500 12 Foundation 0x3145ddaa 0x313ed000 + 462250 13 Foundation 0x31454ee2 0x313ed000 + 425698 14 Logistics 0x00002df8 0x1000 + 7672 15 CoreFoundation 0x32569ede 0x32511000 + 364254 16 UIKit 0x32ba205e 0x32b60000 + 270430 17 UIKit 0x32bf4d4e 0x32b60000 + 609614 18 CoreFoundation 0x32569ede 0x32511000 + 364254 19 UIKit 0x32ba205e 0x32b60000 + 270430 20 UIKit 0x32ba1ffe 0x32b60000 + 270334 21 UIKit 0x32ba1fd0 0x32b60000 + 270288 22 UIKit 0x32ba1d2a 0x32b60000 + 269610 23 UIKit 0x32ba263e 0x32b60000 + 271934 24 UIKit 0x32ba1656 0x32b60000 + 267862 25 UIKit 0x32ba1032 0x32b60000 + 266290 26 UIKit 0x32b9d928 0x32b60000 + 252200 27 UIKit 0x32b9d3a0 0x32b60000 + 250784 28 GraphicsServices 0x32913b72 0x3290f000 + 19314 29 CoreFoundation 0x32567c26 0x32511000 + 355366 30 CoreFoundation 0x32567356 0x32511000 + 353110 31 GraphicsServices 0x32912cb8 0x3290f000 + 15544 32 GraphicsServices 0x32912d64 0x3290f000 + 15716 33 UIKit 0x32b62768 0x32b60000 + 10088 34 UIKit 0x32b6146c 0x32b60000 + 5228 35 Logistics 0x000023c4 0x1000 + 5060 36 Logistics 0x00002380 0x1000 + 4992 Thread 1: 0 libSystem.B.dylib 0x319a9818 0x319a9000 + 2072 1 libSystem.B.dylib 0x319abff8 0x319a9000 + 12280 2 CoreFoundation 0x325677f6 0x32511000 + 354294 3 CoreFoundation 0x32567356 0x32511000 + 353110 4 WebCore 0x305d59de 0x30578000 + 383454 5 libSystem.B.dylib 0x319cd92a 0x319a9000 + 149802 Thread 2: 0 libSystem.B.dylib 0x31a28228 0x319a9000 + 520744 1 libSystem.B.dylib 0x319d3244 0x319a9000 + 172612 2 libSystem.B.dylib 0x319d2d0e 0x319a9000 + 171278 3 CoreMedia 0x33552b04 0x3354f000 + 15108 4 CoreMedia 0x33552a3a 0x3354f000 + 14906 5 MediaToolbox 0x31e1b50c 0x31e18000 + 13580 6 libSystem.B.dylib 0x319cd92a 0x319a9000 + 149802 Thread 0 crashed with ARM Thread State: r0: 0x00000000 r1: 0x00000000 r2: 0x00000001 r3: 0x383c43cc r4: 0x00000006 r5: 0x3361b30d r6: 0x00172f5c r7: 0x2fffe97c r8: 0x2fffe968 r9: 0x00000065 r10: 0x00007150 r11: 0x334bd104 ip: 0x00000025 sp: 0x2fffe97c lr: 0x31a279a3 pc: 0x31a279ac cpsr: 0x00000010 Binary Images: 0x1000 - 0x6fff +Logistics armv6 <350fc970d77b4d8d67bf43f4d7f2a68c> /var/mobile/Applications/32A03443-ADE3-4AAE-AB32-05DB7BEB15D8/Logistics.app/Logistics 0x2c000 - 0x2dfff dns.so armv7 <35ac487c38e38ed5810d5ed0d5c67546> /usr/lib/info/dns.so 0x2fe00000 - 0x2fe24fff dyld armv7 <5db9f5d0275997de58efff111816706e> /usr/lib/dyld 0x30028000 - 0x3004ffff ContentIndex armv7 <67165d749b79ad4b14c8a24f14dab29d> /System/Library/PrivateFrameworks/ContentIndex.framework/ContentIndex 0x30050000 - 0x30054fff ITSync armv7 <a0bf9af6f4ebc7e5977d3da853671162> /System/Library/PrivateFrameworks/ITSync.framework/ITSync 0x30149000 - 0x3016efff AppSupport armv7 <ca2e9a4f0475af20028968840ab94ecf> /System/Library/PrivateFrameworks/AppSupport.framework/AppSupport 0x30175000 - 0x3017ffff MobileCoreServices armv7 <36d71cd8dd49f5d5addb356f449b562a> /System/Library/Frameworks/MobileCoreServices.framework/MobileCoreServices 0x30184000 - 0x30184fff Accelerate armv7 <939f94df6c7e6e7a090ddee1ec09c844> /System/Library/PrivateFrameworks/Accelerate.framework/Accelerate 0x30185000 - 0x301b7fff iCalendar armv7 <235e05f7e167e6dbbd75528a4a37f3a3> /System/Library/PrivateFrameworks/iCalendar.framework/iCalendar 0x301b8000 - 0x301c3fff libz.1.dylib armv7 <8faba7ded9b3527ccf54c2f224f9a12f> /usr/lib/libz.1.dylib 0x301c4000 - 0x301eefff CoreText armv7 <821e9c7c935b6a8d735e2d2d9ebcee04> /System/Library/PrivateFrameworks/CoreText.framework/CoreText 0x301f6000 - 0x301fffff IAP armv7 <36e57cf20df9fcea10ebd0d1c3526a9a> /System/Library/PrivateFrameworks/IAP.framework/IAP 0x30247000 - 0x30279fff MessageUI armv7 <51d0498fb3dba758dae660754f1afb9c> /System/Library/Frameworks/MessageUI.framework/MessageUI 0x3027a000 - 0x3027efff MobileMusicPlayer armv7 <f0e7d2d2d69e9cc2a84e20bced0e1d07> /System/Library/PrivateFrameworks/MobileMusicPlayer.framework/MobileMusicPlayer 0x302c6000 - 0x302cefff CoreVideo armv7 <9259f5ae2a74b53e4f13b27fa3d511e8> /System/Library/PrivateFrameworks/CoreVideo.framework/CoreVideo 0x30348000 - 0x3034afff CrashReporterSupport armv7 <a0a25c381e45f8a3f4ec63bcb17a5a39> /System/Library/PrivateFrameworks/CrashReporterSupport.framework/CrashReporterSupport 0x304a3000 - 0x304cefff MIME armv7 <55a4de1d243273ee7ef4e86a85d591f5> /System/Library/PrivateFrameworks/MIME.framework/MIME 0x304cf000 - 0x3050ffff libsqlite3.dylib armv7 <c2b5985d8307d73b39140e76adfd2eb7> /usr/lib/libsqlite3.dylib 0x3054a000 - 0x30569fff Bom armv7 <37e498957087af50894156808e0a486b> /System/Library/PrivateFrameworks/Bom.framework/Bom 0x30578000 - 0x30a4efff WebCore armv7 <4e2bac4e01a15979c9ac096f78280db0> /System/Library/PrivateFrameworks/WebCore.framework/WebCore 0x30a58000 - 0x30b12fff Message armv7 <a5a7de97c57a6965f27547bf8ff8810c> /System/Library/PrivateFrameworks/Message.framework/Message 0x30b13000 - 0x30b13fff vecLib armv7 <4eb91bf56603dc0db6784d8d3240bfa8> /System/Library/PrivateFrameworks/Accelerate.framework/Frameworks/vecLib.framework/vecLib 0x30c1e000 - 0x30c23fff ProtocolBuffer armv7 <91af9ee5b2f271cbd8c138b3c61e508d> /System/Library/PrivateFrameworks/ProtocolBuffer.framework/ProtocolBuffer 0x30d05000 - 0x30d29fff SystemConfiguration armv7 <c57df668b510f025ee5a173ad30fb48e> /System/Library/Frameworks/SystemConfiguration.framework/SystemConfiguration 0x30d6c000 - 0x30decfff QuartzCore armv7 <af0722911ffc74fc08075e9831a6222e> /System/Library/Frameworks/QuartzCore.framework/QuartzCore 0x30e5d000 - 0x30e72fff libresolv.9.dylib armv7 <2b6a9404652dd2b5abd1c6a5583e8533> /usr/lib/libresolv.9.dylib 0x30e73000 - 0x30ebdfff GMM armv7 <72c87b3b08ab4359802b6efed472bf46> /System/Library/PrivateFrameworks/GMM.framework/GMM 0x30ec7000 - 0x30ed0fff SpringBoardServices armv7 <17ca8b5262cd6484d41efdc72c6fd057> /System/Library/PrivateFrameworks/SpringBoardServices.framework/SpringBoardServices 0x30ed1000 - 0x30f43fff LDAP armv7 <a5f6d51ebcab28eeabe0f2bbbdeb8cc7> /System/Library/PrivateFrameworks/LDAP.framework/LDAP 0x30fe6000 - 0x30ffbfff OpenGLES armv7 <be80a5e4c55c2920be2c31f740bb9dba> /System/Library/Frameworks/OpenGLES.framework/OpenGLES 0x31003000 - 0x31009fff libkxld.dylib armv7 <04ab19af95239c12a98539478eebc560> /usr/lib/system/libkxld.dylib 0x3114f000 - 0x311acfff MediaPlayer armv7 <1021fc5da1419ba297464f71049ad084> /System/Library/Frameworks/MediaPlayer.framework/MediaPlayer 0x311ad000 - 0x311cefff CoreLocation armv7 <a3857b8324f90ae48994df15fdfbcda6> /System/Library/Frameworks/CoreLocation.framework/CoreLocation 0x311d5000 - 0x31214fff Celestial armv7 <f8bde8e040e6aac9e36e0aa8b43ee8cc> /System/Library/PrivateFrameworks/Celestial.framework/Celestial 0x312f6000 - 0x312fcfff libgcc_s.1.dylib armv7 <263b2691cd12171b31fa600716104e4a> /usr/lib/libgcc_s.1.dylib 0x31338000 - 0x31367fff libCGFreetype.A.dylib armv7 <2ec5ad6812f5ea3859cb4189d62b7265> /System/Library/Frameworks/CoreGraphics.framework/Resources/libCGFreetype.A.dylib 0x31393000 - 0x313cafff IOKit armv7 <0afabe8bf08fc163ba8e4ed614092cd3> /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit 0x313e9000 - 0x313eafff IOMobileFramebuffer armv7 <9d9f0254b5b64ced3d58191748f3027b> /System/Library/PrivateFrameworks/IOMobileFramebuffer.framework/IOMobileFramebuffer 0x313ed000 - 0x314e2fff Foundation armv7 <ede5b943f529ce1b862c15dc876992c1> /System/Library/Frameworks/Foundation.framework/Foundation 0x314ed000 - 0x31599fff libxml2.2.dylib armv7 <a491bfc5f062f33185a3f98969bae3c2> /usr/lib/libxml2.2.dylib 0x315fc000 - 0x315fefff MobileInstallation armv7 <b8ebf64838bdfe5315dab5745482e30c> /System/Library/PrivateFrameworks/MobileInstallation.framework/MobileInstallation 0x31919000 - 0x31923fff MobileBluetooth armv7 <bc6cf9563c3a14a86cde6ddf6cc3ed45> /System/Library/PrivateFrameworks/MobileBluetooth.framework/MobileBluetooth 0x31926000 - 0x319a8fff WebKit armv7 <b9b7246a09f5db68e44497d318cb3ab6> /System/Library/PrivateFrameworks/WebKit.framework/WebKit 0x319a9000 - 0x31aa0fff libSystem.B.dylib armv7 <3f94d4b13815a93cbdfc6c7dc2afe5b4> /usr/lib/libSystem.B.dylib 0x31aa2000 - 0x31b8bfff AudioToolbox armv7 <393fa1e155bb0523c2a90555bb394498> /System/Library/Frameworks/AudioToolbox.framework/AudioToolbox 0x31b8d000 - 0x31bfcfff CFNetwork armv7 <b55671f2472fdae3f811ae6f636b4e2e> /System/Library/Frameworks/CFNetwork.framework/CFNetwork 0x31cb2000 - 0x31d12fff AddressBookUI armv7 <5e5b83d3c9e2c0676671feebfb8d37c9> /System/Library/Frameworks/AddressBookUI.framework/AddressBookUI 0x31d19000 - 0x31d21fff AccountSettings armv7 <37a8916d02c399bfccc56e92ad68e84b> /System/Library/PrivateFrameworks/AccountSettings.framework/AccountSettings 0x31d28000 - 0x31d34fff MobileDeviceLink armv7 <d757be3521f8ed71709728790c29bdb2> /System/Library/PrivateFrameworks/MobileDeviceLink.framework/MobileDeviceLink 0x31d3a000 - 0x31d3cfff Notes armv7 <f7c579348cb58b5f2218c042cf46f422> /System/Library/PrivateFrameworks/Notes.framework/Notes 0x31d59000 - 0x31d5cfff IOSurface armv7 <81661b8e151a9af6ce5704a728e12dc7> /System/Library/PrivateFrameworks/IOSurface.framework/IOSurface 0x31e18000 - 0x31ed8fff MediaToolbox armv7 <b9023dc22073ab28f6fb8ecbe00951c2> /System/Library/PrivateFrameworks/MediaToolbox.framework/MediaToolbox 0x31ed9000 - 0x31f8dfff JavaScriptCore armv7 <d3434c868a9a0f4016ed32ba90a35c4d> /System/Library/PrivateFrameworks/JavaScriptCore.framework/JavaScriptCore 0x31f91000 - 0x320e6fff CoreGraphics armv7 <5852bd39fd1ef304da7b017949755cab> /System/Library/Frameworks/CoreGraphics.framework/CoreGraphics 0x32150000 - 0x3217cfff DAVKit armv7 <80cf41b34d377d21d406fcb6835fbf77> /System/Library/PrivateFrameworks/DAVKit.framework/DAVKit 0x321d4000 - 0x322d5fff libicucore.A.dylib armv7 <1081389fef915d9b8858d0dfff04568e> /usr/lib/libicucore.A.dylib 0x322d6000 - 0x322d9fff ActorKit armv7 <c81b8278a35c6e8293aaf7c55811ba2d> /System/Library/PrivateFrameworks/ActorKit.framework/ActorKit 0x322da000 - 0x32388fff DataAccess armv7 <e9225a8b94fe76047095ebecd6fd58c5> /System/Library/PrivateFrameworks/DataAccess.framework/DataAccess 0x32389000 - 0x32390fff libbz2.1.0.dylib armv7 <6675987a84fc3d127305c175085914aa> /usr/lib/libbz2.1.0.dylib 0x323fc000 - 0x32499fff libobjc.A.dylib armv7 <1a57ecb9f5c0f274a274b3eb53df48ed> /usr/lib/libobjc.A.dylib 0x324b5000 - 0x324cbfff AddressBook armv7 <c21d7ab21d7e67f84c487bc278568bbe> /System/Library/Frameworks/AddressBook.framework/AddressBook 0x324d6000 - 0x32510fff CoreTelephony armv7 <5b68ed8ffac45237acc948e9d5bb5e83> /System/Library/PrivateFrameworks/CoreTelephony.framework/CoreTelephony 0x32511000 - 0x325bbfff CoreFoundation armv7 <51c03f1f8755868781e3e719d8df7b6f> /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation 0x325ca000 - 0x3268bfff MusicLibrary armv7 <ce4922bef1cc1d6706da32480c2272bd> /System/Library/PrivateFrameworks/MusicLibrary.framework/MusicLibrary 0x3268c000 - 0x3268efff AppleJPEG armv7 <af51b716dce446178b366a8d5af48ebb> /System/Library/PrivateFrameworks/AppleJPEG.framework/AppleJPEG 0x3268f000 - 0x326adfff MobileSync armv7 <1eecaede37e5d042180473311efccda3> /System/Library/PrivateFrameworks/MobileSync.framework/MobileSync 0x32860000 - 0x3286bfff PersistentConnection armv7 <73c2bec8b5f870ea528f359c2374f19c> /System/Library/PrivateFrameworks/PersistentConnection.framework/PersistentConnection 0x3286c000 - 0x328f2fff ImageIO armv7 <ea76d0fd3ca8c1a6104bc0f013255e2d> /System/Library/PrivateFrameworks/ImageIO.framework/ImageIO 0x3290f000 - 0x32918fff GraphicsServices armv7 <5387c7197570ac7df97759c0402d453d> /System/Library/PrivateFrameworks/GraphicsServices.framework/GraphicsServices 0x32933000 - 0x3299bfff PhotoLibrary armv7 <0535fc553452b7b6cc25ac990cff4a40> /System/Library/PrivateFrameworks/PhotoLibrary.framework/PhotoLibrary 0x3299f000 - 0x329ccfff Calendar armv7 <52446b9087d707210cb515b0894afee5> /System/Library/PrivateFrameworks/Calendar.framework/Calendar 0x329d6000 - 0x329fffff TextInput armv7 <2e983bf3876bfeaf7151aa8a0e68dabc> /System/Library/PrivateFrameworks/TextInput.framework/TextInput 0x32a01000 - 0x32a02fff CoreSurface armv7 <f3aae0195e4510657029b19161138593> /System/Library/PrivateFrameworks/CoreSurface.framework/CoreSurface 0x32a09000 - 0x32a0bfff Camera armv7 <81c49c0f094225be8a6ad129a8641c86> /System/Library/PrivateFrameworks/Camera.framework/Camera 0x32a56000 - 0x32a7efff libvDSP.dylib armv7 <d846b621ce13b16241ac2d32ddd28615> /System/Library/PrivateFrameworks/Accelerate.framework/Frameworks/vecLib.framework/libvDSP.dylib 0x32a81000 - 0x32a86fff liblockdown.dylib armv7 <5b665cd59d9884ceecec6441fc42bc14> /usr/lib/liblockdown.dylib 0x32a8a000 - 0x32a96fff DataAccessExpress armv7 <ad1aeb0c6df9b0b917c1c99405e36cc4> /System/Library/PrivateFrameworks/DataAccessExpress.framework/DataAccessExpress 0x32ab5000 - 0x32ac3fff TelephonyUI armv7 <b34206a34dfb1cc4183274cc6c0a3f36> /System/Library/PrivateFrameworks/TelephonyUI.framework/TelephonyUI 0x32ac4000 - 0x32ae5fff MobileQuickLook armv7 <06cb03b3f1bd2c5bfa27ba2aef0849b2> /System/Library/PrivateFrameworks/MobileQuickLook.framework/MobileQuickLook 0x32aed000 - 0x32b07fff libRIP.A.dylib armv7 <0dc4e83b63c1350517949e24204817fb> /System/Library/Frameworks/CoreGraphics.framework/Resources/libRIP.A.dylib 0x32b09000 - 0x32b2dfff Security armv7 <3a3406fe12445942f4d767c7fa4c24ce> /System/Library/Frameworks/Security.framework/Security 0x32b2e000 - 0x32b5bfff VideoToolbox armv7 <08b68b92f987faff46a127f6f78708a0> /System/Library/PrivateFrameworks/VideoToolbox.framework/VideoToolbox 0x32b60000 - 0x33524fff UIKit armv7 <47c9d61f9cbe72938d1bfb1588306b97> /System/Library/Frameworks/UIKit.framework/UIKit 0x3354f000 - 0x33580fff CoreMedia armv7 <584770f5de9c599a2d420eb8666921ac> /System/Library/PrivateFrameworks/CoreMedia.framework/CoreMedia 0x33586000 - 0x33588fff ArtworkCache armv7 <66057eb40ba62cb544fe00ac4f2b498e> /System/Library/PrivateFrameworks/ArtworkCache.framework/ArtworkCache 0x33594000 - 0x33599fff MBX2D armv7 <ae091892e4419221d25f8db9307cedf0> /System/Library/PrivateFrameworks/MBX2D.framework/MBX2D 0x3359a000 - 0x335d7fff CoreAudio armv7 <1eb427066a911d979a024e445464a067> /System/Library/Frameworks/CoreAudio.framework/CoreAudio 0x335d8000 - 0x33621fff libstdc++.6.dylib armv7 <99401ed10ec4d5608ce23ec33dd757c6> /usr/lib/libstdc++.6.dylib 0x33627000 - 0x33632fff libbsm.0.dylib armv7 <03f3879bad1802636dadeb457ee74cb2> /usr/lib/libbsm.0.dylib

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  • Strategies for Synchronizing Data Between a Rails App and iPhone App

    - by jessecurry
    I've written many iPhone Applications that have pulled data from web services and I've worked on synchronizing data between an iPhone App and a Web Application, but I've always felt that there is probably a better way to handle the synchronization. I'd like to know what strategies you have used to synchronize data between your iPhone(read: mobile) Apps and your Rails(read: web) Applications. Are there any strategies that scale particularly well? How have you dealt with large amounts of data? (Do you use paged responses?) How do you make sure that data is not overwritten? Is there a reason to avoid Ruby on Rails? if so, can you suggest an alternative? What is better about the alternative? What strategies have failed? Why do you believe that those strategies failed? I would like to be able to keep all of the data modifications on the server, but the particular application I am about to start work on will need the ability to operate while disconnected from the network. The user will be able to update data on the mobile device and update data through the web application. When the user's mobile device connects to the server any local changes will be pushed to the server.

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  • Design pattern for procedural terrain assets

    - by Alex
    I'm developing a procedural terrain class at the moment and am stuck on the correct design pattern. The terrain is 2D and is constructed from a series of (x,y) points. I currently have a method that just randomly adds points to an array of points to generate a random spread of points. However I need a more elaborate system for generating the terrain. The terrain will be built form a series of re-accuring terrain structures eg. a pit, jump, hill etc. Each structure will have some randomness assigned to it, each height of hill will be random, pit size will be random etc. Each terrain structure will have: A property detailing the number of points making up that structure A method for generating the points (not absolutely necessary) My current thinking is to have a class for each terrain structure, create a fixed amount of terrain elements ahead of the player, loop over these and add the corresponding points to the game. What is the best way to create these procedural terrain structures when they are ultimately just a set of functions for generating terrain elements? Is a class for each terrain element excessive? I'm developing the game for iphone so any objective-c related answers would be welcome.

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  • What Technology can Render Medium Scale 3d Environments in a Web-Browser

    - by JakeM
    I intend to make a web application that displays 3d environments that can be navigated by dragging(with a finger or mouse depending on the platform). The web app will render 3d environments of development sites including contours, water pipeline locations, buildings etc. I am trying to decide what technology/libraries to use that will create a web-app that will work on Android-Web-Browser, iOS-Safari, IE9, Safari, Firefox and Chrome. And also what technology will provide speed in development. I understand that this is 'asking for my cake and eating it too'/'asking for the moon' but I don't know all the technologies out there - so there may be advanced libraries that can render 3d environments across many web-browsers including the main smart phone ones and I dont know of them. The 3d rendering would not be highly detailed buildings or water with effects, but rather simple 3d representations of these objects. The environment would be navigable by dragging around and you could view the landscape in layers(view only contour lines, view only underground pipelines, view only sewerage pipes, etc.). Are there any 3d libraries for web-browsers out there? Is there a way to run OpenGL(or OpenGL ES) through a webbrowser? What technology would you use if you were making this kind of app/web app that should work on desktop Windows, Android, iOS and WindowsPhone? Is there any technology I have failed to mention that would be good for this kind of project? I am tending towards a Browser Driven Web App because I get that cross platform ability(where it even works on linux and MacOS by using compatible web-browsers). Also I know of CSS3 transforms that can create cubes that can rotate in 3d space(NOTE only works for WebKit browsers - so no IE :( ). But I don't know if CSS3 is robust enough to render whole 3d environments? Do you think it could? Maybe I could use HTML5 canvas's for this? Can Google maps create custom 3d maps?

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  • Modular Web App Network Architecture

    - by nairware
    Assuming that I am dealing with dedicated physical servers or VPSs, is it conceivable and does it make sense to have distinct servers setup with the following roles to host a web application? Reverse Proxy Web server Application server Database server Specific points of interest: I am confused how to even separate the web and application servers. My understanding was that such 3-tier architectures were feasible. It is unclear to me if the app server would reside directly between the web and database server, or if the web server could directly interact with the database as well. The app server could either do the computational heavy-lifting on behalf of the app server or it could do heavy-lifting plus control all of the business logic (as implied in the diagram above, thus denying the web server of direct database access). I am also unsure what role the reverse proxy (ex. nginx) could and should fulfill as a web server, given the above mentioned setup. I know that nginx has web server features. But I do not know if it makes sense to have the reverse proxy be its own VPS, given that the web server–in theory–would be separate from the app server.

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  • Moving 2d camera in the y direction

    - by Alex
    I'm developing a simple game for the iphone and am struggling to work out the best way for the camera to follow the main character. The following picture hightlights the three main components: There are 3 components to this: Circle - the main character Green line - terrain Black background The terrain is simply made from an array of points (approx 20 points per screen width). The terrain is moved in the x direction relative to the black background in order to keep the circle in its position shown. The distance to move the terrain is simply: movex = circle.position.x - terrain.position.x with a constant to fix the circle at some distance from the left of the screen. I am struggling to determine the best way to position the terrain in the y plane keep the focus in the character. I want to move the terrain in the y direction smoothly and not fix it to the position of the circle, so the circle can move in the y plane. If I take the same approach as the x positioning, the character is fixed at a point on the screen and the terrain moves. I could sample some terrain points either side of the character and produce an average, but in my implementation this was not smooth. I thought another approach might be to create a camera 'line' that is a smooth version of the terrain line and make the camerea follow this, but I'm not sure if this is the optimum solution. Any advice is much appreciated!

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  • Help needed to write input for .net web services

    - by MaheshBabu
    Hi folks, i am new to iphone web services. I need to get data from .net web server for that my soap message is NSString *xml = [NSString stringWithFormat:@"<MortgageGetLoanOfficerInfo><PhoneNumber>919703661366</PhoneNumber></MortgageGetLoanOfficerInfo>"]; NSString *soapMessage = [NSString stringWithFormat: @"<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" "<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">\n" "<soap:Body>\n" "<GenericAndroidMethod xmlns=\"Mortgage\">\n" "<methodName>MortgageGetLoanOfficerInfo</methodName>" "<xmlParam>%@</xmlParam>" "</GenericAndroidMethod>\n" "</soap:Body>\n" "</soap:Envelope>\n",xml ]; But i did n't get response. While i am checking in charles web debugging proxy it will show like this. But i need to pass <MortgageGetLoanOfficerInfo><PhoneNumber>919703661366</PhoneNumber></MortgageGetLoanOfficerInfo> as a single string. How can i done this pls help me. Thank u in advance.

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  • Upgrade iPhone to iPad For FREE [Geek Fun]

    - by Gopinath
    Can’t afford an iPad or it’s not yet on sale in your country? Don’t worry. You can upgrade your iPhone to iPad at free of cost. Wondering how? Here it is. via appadvice Join us on Facebook to read all our stories right inside your Facebook news feed.

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  • Web Development Trends: Mobile First, Data-Oriented Development, and Single Page Applications

    - by dwahlin
    I recently had the opportunity to give a keynote talk at an Intel conference about key trends in the world of Web development that I feel teams should be taking into account with projects. It was a lot of fun and I had the opportunity to talk with a lot of different people about projects they’re working on. There are a million things that could be covered for this type of talk (HTML5 anyone?) but I only had 60 minutes and couldn’t possibly cover them all so I decided to focus on 3 key areas: mobile, data-oriented development, and SPAs. The talk was geared toward introducing people (many who weren’t Web developers) to topics such as mobile first development (demos showed a few tools to help here), responsive design techniques, data binding techniques that can simplify code, and Single Page Application (SPA) benefits. Links to code demos shown during the presentation can be found at the end of the slide deck. Web Development Trends - What's New in the World of Web Development by Dan Wahlin

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  • Cocos3d lighting problem

    - by Parasithe
    I'm currently working on a cocos3d project, but I'm having some trouble with lighting and I have no idea how to solve it. I've tried everything and the lighting is always as bad in the game. The first picture is from 3ds max (the software we used for 3d) and the second is from my iphone app. http://prntscr.com/ly378 http://prntscr.com/ly2io As you can see, the lighting is really bad in the app. I manually add my spots and the ambiant light. Here is all my lighting code : _spot = [CC3Light lightWithName: @"Spot" withLightIndex: 0]; // Set the ambient scene lighting. ccColor4F ambientColor = { 0.9, 0.9, 0.9, 1 }; self.ambientLight = ambientColor; //Positioning _spot.target = [self getNodeNamed:kCharacterName]; _spot.location = cc3v( 400, 400, -600 ); // Adjust the relative ambient and diffuse lighting of the main light to // improve realisim, particularly on shadow effects. _spot.diffuseColor = CCC4FMake(0.8, 0.8, 0.8, 1.0); _spot.specularColor = CCC4FMake(0, 0, 0, 1); [_spot setAttenuationCoefficients:CC3AttenuationCoefficientsMake(0, 0, 1)]; // Another mechansim for adjusting shadow intensities is shadowIntensityFactor. // For better effect, set here to a value less than one to lighten the shadows // cast by the main light. _spot.shadowIntensityFactor = 0.75; [self addChild:_spot]; _spot2 = [CC3Light lightWithName: @"Spot2" withLightIndex: 1]; //Positioning _spot2.target = [self getNodeNamed:kCharacterName]; _spot2.location = cc3v( -550, 400, -800 ); _spot2.diffuseColor = CCC4FMake(0.8, 0.8, 0.8, 1.0); _spot2.specularColor = CCC4FMake(0, 0, 0, 1); [_spot2 setAttenuationCoefficients:CC3AttenuationCoefficientsMake(0, 0, 1)]; _spot2.shadowIntensityFactor = 0.75; [self addChild:_spot2]; I'd really appreciate if anyone would have some tip on how to fix the lighting. Maybe my spots are bad? maybe it's the material? I really have no idea. Any help would be welcomed. I already ask some help on cocos2d forums. I had some answers but I need more help.

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