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• An important question on iPhone file writing

  - by Kyle

  I use the NSHomeDirectory() function to get the app's home folder, and write to the Documents directory within that. I'm curious, though, what happens when the user downloads an update for the app in the appstore? Will it all be deleted? When I delete the app on the device, then reinstall it, its wiped out. So, I'm curious to know what will happen with an update. I can't find this in the documentation at all. Thanks alot for reading. I really tried to find this asked somewhere else first, but couldn't. Hopefully this page will be informative to guys like me who are confused on the subject.

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• Dealing with XML in ASP.NET MVC

  - by Matt W

  I have a block of XML in a database which is easy enough to pull out using ASP.NET MVC, however I would like to access and modify the XML in an way more consistent with class instances. Is there a way to get the MVC (or any other model) to generate a data access (or perhaps Entity) class set from the DB-stored XML? If the above is rather obtuse, the question could be summarised as; What method would you use to best access and modify XML stored in a database from an ASP.NET MVC application? Thanks, Matt.

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• Sound not working in iPhone Simulator?

  - by pix0r

  Somehow my iPhone Simulator is unable to play sounds. First an app I'm working on using AudioServicesPlaySystemSound() stopped working.. I spent a while debugging this but sound is still working on the iPhone when I run the app on the device. I get the same results with other iPhone apps such as the sample Crash Landing app. I can't find a sound setting anywhere in the simulator or Xcode preferences. I've tried resetting the simulator through "Reset Content and Settings" menu item to no avail.

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• NSDateFormatterFullStyle without year (NSDateFormatter)

  - by Brian Halpin

  Using the user's currentLocale from the device, I want to have a date format exactly like the one generated for NSDateFormatterFullStyle minus the year: [dateFormatter setDateStyle:NSDateFormatterFullStyle]; Friday, 21 September (2012) I've noticed the iPhone app, Living Earth does this and works for all locales, so does the iPhone lock screen. A custom formatter such as, [dateFormatter setDateFormat:@"EEEE, MMMM"]; won't change with localisation. Can anyone shed some light on how to accomplish this? None of the options for date style seem to do this. Thanks

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• will paginate, nested routes, ruby, rails

  - by Sam

  I'm trying to get will paginate to link to my nested route instead of the regular posts variable. I know I'm supposed to pass some params to paginate but I don't know how to pass them. Basically there is an array stored in @posts and the other param paginate has access to is category_id. The nested route is /category/1/posts but hitting next and previous on will paginate returns a url like this posts?page=1&category_id=7. <%= will_paginate @most_recent_posts "What do I do here?" %> This is the result of Yannis's answer: In your controller you can do: @posts = @category.posts.paginate And in your view: <%= will_paginate(@post) %> Doing this comes up with the following URL posts?page=2&post_category_id=athlete_management routes.rb #there are more routes but these are the relevant ones map.resources :posts map.resources :post_categories, :has_many => :posts solution map.resources :post_categories do |post_category| post_category.resources :posts end map.resources :posts Had to declare the resource after the block Thanks stephen!

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• Blackberry ESS standalone mode && Outlook 2007

  - by new Blackberry developer

  Hi, I launch Blackberry ESS in standalone mode. However I don't have Outlook Express on my computer. Instead I have Outlook 2007 on my computer. I set up an email account in Outlook 2007 which uses 'localhost' as its pop3/smtp server. The port numbers I used are the same as those in http://www.blackberryforums.com/developer-forum/5590-sending-receiving-email-device-simulator.html. However I got the following exception. 'UnknownHostException:pop3.server'. I am wondering if Outlook 2007 works with ESS.

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• Reducing piracy of iPhone applications

  - by Alex Reynolds

  What are accepted methods to reduce iPhone application piracy, which do not violate Apple's evaluation process? If my application "phones home" to provide the unique device ID on which it runs, what other information would I need to collect (e.g., the Apple ID used to purchase the application) to create a valid registration token that authorizes use of the application? Likewise, what code would I use to access that extra data? What seem to be the best available technical approaches to this problem, at the present time? (Please refrain from non-programming answers about how piracy is inevitable, etc.)

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• MKReverseGeocoder delegate location?

  - by fuzzygoat

  I have a quick question regarding memory management that I am not quite sure about. I currently have a locationManager delegate that calls locationManager:didUpdateToLocation:fromLocation when it resolves the device location. My question is I am looking at adding ReverseGeoCoding after I have obtained the [newLocation coordinate] but am unsure about doing the alloc here, as each time locationManager:didUpdateToLocation:fromLocation gets called I will be alloc-ing a new MKReverseGeoCoder? // LOCATION -(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation { // GeoCoding: MKReverseGeocoder *geoCoder = [[MKReverseGeocoder alloc] initWithCoordinate:[newLocation coordinate]]; [geoCoder setDelegate:self]; [geoCoder start]; [self foundLocation]; } Can anyone point me in the right direction with regards to this? I did try doing the alloc in application:didFinishLaunchingWithOptions: but then realised I did not have access to [newLocation coordinate]. many thanks gary

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• Pipe data from InputStream to OutputStream in Java

  - by Wangnick

  Dear all, I'd like to send a file contained in a ZIP archive unzipped to an external program for further decoding and to read the result back into Java. ZipInputStream zis = new ZipInputStream(new FileInputStream(ZIPPATH)); Process decoder = new ProcessBuilder(DECODER).start(); ??? BufferedReader br = new BufferedReader(new InputStreamReader( decoder.getInputStream(),"us-ascii")); for (String line = br.readLine(); line!=null; line = br.readLine()) { ... } What do I need to put into ??? to pipe the zis content to the decoder.getOutputStream()? I guess a dedicated thread is needed, as the decoder process might block when its output is not consumed.

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• How to secure connection between PHP and Android

  - by Elad Cohen

  I am developing an application for the Android that requires a connection with PHP pages in order to add sensitive data to a database that will affect the application. Since it's very easy to reverse engineer an android app, one can simply find the url where the data is sent to and manipulate it. I thought about creating a registration based on IMEI, but one can still able to manipulate it for his malicious purposes. I have also checked OAuth but I didn't really understand how it works and if it can help in my condition. What can I do to fully secure my application? Thanks in advance! EDIT: By the way, what I am mostly trying to achieve here is to make sure the requests are being sent from an Android and not from any other device.

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• Technology stack for very frequent gps data collection

  - by gvaswani

  I am working on a project that involves gps data collection from many users (say 1000) every second (while they move). I am planning on using a dedicated database instance on EC2 with the mysql persistent block storage and run a ruby on rails application with nginx frontend. I haven't worked on such data collection application before. Am I missing something here? I will have a another instance which will act as application server and use the data from the same EBS. If anybody has dealt with such a system before, Any advise would be much appreciated?

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• Dialing a command prefix on the iPhone

  - by tewha

  Our application lets users call phone numbers. Users would like to be able to block their caller ID. On other platforms, we let the user specify a custom dialing prefix. For instance, on my cell provider it's #31#. I've tried two approaches so far. First: id url = [NSURL URLWithString: @"tel:#31#0000000"] // produces nil Second: id encoder = ["#31#0000000" stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding]; // produces %2331%230000000 id url = [NSURL URLWithString: [NSString stringWithFormat: @"tel:%@", encoded]]; // produces a valid-looking NSURL which doesn't do anything I'm thinking at this point that I'm just not allowed to dial # and *, even from a Cocoa touch application. (I know it's not allowed from a web app.) Is this true, or am I missing something obvious?

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• How to add Focuschange Listner to listview in android

  - by jayanthgande

  Hi, I am having a listview in one of my activity.How to set foucs change listner.I tried with following block of code I am not getting result. product_search_list = (ListView) findViewById(R.id.productlist); product_search_list.setOnFocusChangeListener(onproductchangelistener); private OnFocusChangeListener onproductchangelistener = new OnFocusChangeListener() { @Override public void onFocusChange(View v, boolean hasFocus) { int index= (int) ((ListView)v).getSelectedItemId(); Log.i("index",""+index); } }; Actually on focus change of list items I want to get index of focused list item and do the necessary operations. Thanks in advance. Regards: Jayanth

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• Rails equivalent of respond_to |format| with a straight render

  - by brad

  I'm working with ActiveResource a lot so my service models are only using XML. Thus, I have no need for a respond_to block, I literally just render :xml => @model I can't however figure out how to render a 404 header using this. I've had to resort to respond_to, which I think adds a few unnecessary method calls. Here's what I'm using: respond_to do |format| if (record_found) render :xml => @some_record else format.xml{ head :not_found } end end but I just want something like render :xml => head :not_found which doesn't work. Can anyone tell me the proper syntax?

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• Get "As low as" price for bundle product in Magento

  - by dardub

  I'm trying to display a list of bundled products using my custom template. I'm not able to display the dynamic price of the bundle product. Previously for simple products I used: $product->getPrice(); which worked, but it just displays $0.00 for bundle items. looking at ../catalog/products/list.phtml I tried $this->$getPriceHtml($product, true); after extending my block to Mage_Catalog_Block_Product_Abstract I got simple products working again, but bundle products still show $0.00 Is there another way to display the as low as price for dynamic bundle prices? I cleared cache and reindexed and all that good stuff. The price shows up correctly under the default category list, just not under my custom page.

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• iPad split controller that doesn't hide the left pane in portrait

  - by Tim Norman

  I am trying to implement a split view controller like UISplitViewController on the iPad, but I don't want the left pane to be hidden when the device is in portrait orientation. So I've created a UIViewController subclass for this in IB and it works fine without any sub-view controllers. Now I'm trying to wrap my head around what is required to setup and manage the two UIViewController objects for the left and right panes. In my app, they are going to both be UINavigationController with a UITableView in them. I've hit a mental road block about how to set this up and was hoping someone could point me to some sample code or give me a recommendation for architecture here...

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• Any way to get read timeouts with Java NIO/selectors?

  - by mmebane

  I'm converting a Java server application which used blocking IO and thread-per-client to NIO and a single IO thread (probably a thread pool after I get the basic implementation done). The one thing I am having an issue with is disconnecting clients after they have been idle for a period. I had previously been using SO_TIMEOUT and blocking reads. However, with selector-based IO, reads don't block... I was hoping that I'd be able to set a timeout and be able to select on read timeout, with something like SelectionKey.isReadTimeout(), but nothing like that seems to exist. The current best solution I have come up with is to have a Timer with a TimerTask which keeps track of the keys which are waiting on read, and then canceling them and re-scheduling them on each read. Is there a better solution?

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• Signature invalid only for ad hoc

  - by brettr

  I'm not sure what changed on my ad hocs but I get this error when trying to install: Application failed codesign verification. The signature was invalid, or it was not signed with an Apple submission certificate. (-19011) Device debug builds fine. The cert that is associated with my ad hoc provisioning profile doesn't expire until 2011. I've searched Google but haven't found any applicable solution, except some mention about deleting and recreating the certs. Before I go down that rode, has any one experienced and resolved this issue? I'm using Xcode 3.2.3 and building against sdk 3.0.

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• Verifying the purchaser of an App Store application

  - by Keldi

  Is there a way for the developer of an App Store application to tie a sale to an individual user/device ID/Apple account? In other words, a method for the developer to double-check that a specific user has legally purchased the software? I haven't been able to find a reliable answer to this yet. I'm not looking for specific code examples, just some sort of idea as to how possible (or difficult) this is. My intent isn't to penalize piracy; it's to be able to provide additional benefits to paid customers. As such, I'm not looking for a way to identify a cracked or pirated version, which I gather has already been solved. Thanks in advance for any help you can provide!

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• Is there a Novatel Wireless Modem Emulator or something similar?

  - by David Brown

  Novatel Wireless provides their NovaCore SDK for developers wishing to interface with their line of modems. I'm currently developing an open source managed wrapper for it, but I'm having difficulties with testing. I own a Novatel MiFi and have mobile broadband service through Sprint, but that can only get me so far. The device is already activated, thus I can't test the network activation features of the NovaCore SDK. There are also certain features only available for HSPA modems, which I am not able to get in my area. Is there an emulator capable of emulating a Novatel Wireless modem so that I can test my library without physical hardware and an actual data connection? If not, do you have any other suggestions that might help in this situation? I've contacted Novatel Wireless via email and their developer forum, but have not received a response. Thanks!

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• Which JavaScript MVC framework to use for wysiwyg editing and floating context-sensitive settings pa

  - by ernests

  I'm developing a cms that allows editing everything on the page (generated server-side with a template engine) by just clicking on it — the area turns into input field, textarea or a full-featured tinyMCE editor, Template defines editable elements like "page heading", "copyright footer text", "image", "rich text block" etc. Along with that there's always a flotaing panel with several tabs, some of which contain general settings like page bacground color, font settings etc, but some are context sensitive (e.g., the clicking on "image" editable field triggers to display uploading/cropping/captioning interface in the floating panel). All settings in the panel are either simple inputs or sliders or checkboxes. I'm new to using MVC with javascript, and in fact haven't used it much before. jQuery is used as code library for the project. Should i use JavascriptMVC, SproutCore or anything else? Does any of them allow some kind of sandboxing (within bounds of commmon sense) to allow some javascript code by user-generated skins on my cms? thank you!

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• Vertical Align Issue

  - by Nasser Hajloo

  I have following styles which work greate but Vertical-Align:middle or bottom doesn't work in it. every thing inside goes top ofthe div .Progress { display: inline-block; z-index: 1000; width:auto; height: auto; background-color: #A9C646; vertical-align: bottom; text-align: center; text-align: -moz-center; !text-align: center; position: absolute; opacity: 0.4; filter: alpha(opacity = 40); }

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• Is there a way to watch all COM activity on a computer?

  - by Fake Name

  I'm trying to deal with a piece of specialized hardware, that presents it's interface as a COM object, using win32com in Python. However, the documentation for how to actually set up the hardware through the COM object is sparse (it requires a significant amount of initialization), and entirely oriented at using a bunch of pre-built libraries for Visual Studio, which are not accessible through python. That said, is there any way to watch all local COM activity, so I can sort through the activity logs to try and figure out how the existing demo programs properly initialize the hardware, and replicate the behavior in my python script? Ideally, there would be something in the vein of wireshark for doing this. Note: I have very little (read: basically no) experience using COM, as my focus is mostly embedded hardware (and a little python dev on the side). However, I'm stuck with this particular device.

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• Need an ASP.NET MVC long running process with user feedback

  - by Jason

  I've been trying to create a controller in my project for delivering what could turn out to be quite complex reports. As a result they can take a relatively long time and a progress bar would certainly help users to know that things are progressing. The report will be kicked off via an AJAX request, with the idea being that periodic JSON requests will get the status and update the progress bar. I've been experimenting with the AsyncController as that seems to be a nice way of running long processes without tying up resources, but it doesn't appear to give me any way of checking on the progress (and seems to block further JSON requests and I haven't discovered why yet). After that I've tried resorting to storing progress in a static variable on the controller and reading the status from that - but to be honest that all seems a bit hacky! All suggestions gratefully accepted!

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• How do you interface with a USB to Parallel adapter?

  - by Hans

  I'm currently doing a project where I have to interact with a circuit I made through the parallel port of a computer. However, my computer doesn't have a parallel port so I borrowed a Parallel to USB adapter cable. The cable didn't come with any drivers, but it's recognized by the device manager as a "USB Printing Support" controller, under the USB section. It seems that old parallel printers can be plugged in and work properly without any problems. So my question is, if I write a program in Java that tries to interact with a parallel port directly, will it work? And if not, can anyone give me some pointers as to what I need to do to interact with it? Thanks.

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