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• Facebook Connect Post Feed from iPhone App without preview Broken!? URGENT!

  - by nephilite

  Hello All: I just downloaded the latest FBConnect build, popped in my keys and getting a mysterious hanging error only when I try to post a feed without previewing (setting preview to zero). The activity indicated disappears and the blank dialog window just hangs there. (This mirrors what I was getting on the app I was developing). If I try to post a feed with preview it works; set preview to zero it just hangs. Again; thats with the sample project "Publish Feed" button. Hitting getting permission button and then Publish Feed does same thing...... Other Developers have confirmed seeing this too...Apps that have previously had working feed posts have been broken for weeks. Discussions on facebook connect forum seem to be related to this. More Info Here: http://forum.developers.facebook.com/ I have to submit my app to apple in less than 3 hours... please assist!

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• How to disable secret_token in Rails 3?

  - by Damian Nowak

  I have several separate Rails 2 applications which share the same cookie. I upgraded one the applications to Rails 3.2.15 now. Mandatory secret_token in Rails 3 makes it impossible to share the session with the Rails 2 apps. I am storing the session in Redis. What the visitor only gets in the cookie is a session ID. There's no need to encrypt it. Therefore, how to disable secret_token in Rails 3? A secret is required to generate an integrity hash for cookie session data. Use config.secret_token = "some secret phrase of at least 30 characters"in config/initializers/secret_token.rb

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• explanation about prototype.js function binding code

  - by resopollution

  From: http://ejohn.org/apps/learn/#2 Function.prototype.bind = function(){ var fn = this, args = Array.prototype.slice.call(arguments), object = args.shift(); return function(){ return fn.apply(object, args.concat(Array.prototype.slice.call(arguments))); }; }; Can anyone tell me why the second return is necessary (before fn.apply)? Also, can anyone explain why args.concat is necessary? Why wouldn't it be re-written as: fn.apply(object, args) instead of return fn.apply(object, args.concat(Array.prototype.slice.call(arguments)));

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• How to find good looking font color if background color is known?

  - by Mecki

  There seem to be so many color wheel, color picker, and color matcher web apps out there, where you give one color and the they'll find a couple of other colors that will create a harmonic layout when being used in combination. However most of them focus on background colors only and any text printed on each background color (if text is printed at all in the preview) is either black or white. My problem is different. I know the background color I want to use for a text area. What I need help with is choosing a couple of colors (the more, the merrier) I can use as font colors on this background. Most important is that the color will make sure the font is readable (contrast not being too low, also maybe not being too high to avoid that eyes are stressed) and of course that the combination of foreground and background just looks good. Anyone being aware of such an application? I'd prefer a web application to anything I have to download. Thanks.

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• MVVM (ICommand) in Silverlight

  - by Andrey Khataev

  Hello! Please, don't judge strictly if this question was discussed previously or indirectly answered in huge nearby prism and mvvm blogs. In WPF implementation of RelayCommand or DelegateCommand classes there is a such eventhandler /// <summary> /// Occurs whenever the state of the application changes such that the result of a call to <see cref="CanExecute"/> may return a different value. /// </summary> public event EventHandler CanExecuteChanged { add { CommandManager.RequerySuggested += value; } remove { CommandManager.RequerySuggested -= value; } } but in SL subset of namespaces there are no CommandManager class. And this is where I'm stuck. I haven't yet found an workaround for this in MVVM adoptation for SL (PRISM is so complex for me yet). Different simple HelloWorldMVVM apps don't deal with at all. Thanks in advance and sorry for my English -)

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• The Best solution to sending emails to group members in a social network.

  - by praveen

  I'm developing a social network in php. There is a feature to create custom groups by members and i want to enable the owner of the group to send emails in bulk to all group members. And most importantly i want to make sure that most mails are not going to end up in users' SPAM list. I'm using PHPMailer in my website What should be the best and affordable approach? These are the solutions i came up with. Pls include your own if possible. Using my servers' (hostgator.com) given SMTP server to send emails in bulk Using google apps SMTP (i have even setup SPF for this) Using a third-party to handle my outgoing messages (i.e: mailChimp, iContact ? do they provide APIs ? this is just my idea) Thanks in advance

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• Speeding up CakePHP

  - by DavidYell

  I've been a keen fan and user of CakePHP for about 2.5 years now, but the main bugbear that most fellow developers level at the framework is that it's slow, and the dispatch cycle takes too long to make it a viable solution for production environments. I'm hoping that this question will inspire people to share their tips, tricks and hacks for speeding up CakePHP performance. The blog post I most often refer to is here, http://www.pseudocoder.com/archives/8-ways-to-speed-up-cakephp-apps Which has great tips, but there must be more out there! So please feel free to share your thoughts on making this excellent framework that much more nimble!

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• Modifying all HTTP requests on iPhoneOS with MobileSubstrate?

  - by Yifan

  I want to write a MobileSubstrate (http://www.iphonedevwiki.net/index.php/MobileSubstrate) addon that takes every HTTP request and modifies the URL. (The reason is very complicated and would take a while to explain, so just trust me that there's not an alternative). Basically, I need to know what's the best Objective-C message or C function that I should overwrite to intercept any HTTP request, modify the URL, and send the request back to the original function (this shouldn't be just the first request sent by an application, but any redirects too). I think it may be in NSURL or CFNetwork, but am not sure where exactly. This function should, when replaced, work with any apps and the OS itself.

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• Detecting when Bluetooth is disabled on iOS5

  - by Non Umemoto

  I'm developing blog speaker app. I wanna pause the audio when bluetooth is disabled like iPod app. I thought it's not possible without using private api after reading this. Check if Bluetooth is Enabled? But, my customer told me that Rhapsody and DI Radio apps both support it. Then I found iOS5 has Core Bluetooth framework. https://developer.apple.com/library/ios/documentation/CoreBluetooth/Reference/CoreBluetooth_Framework/CoreBluetooth_Framework.pdf CBCentralManagerStatePoweredOff status seems like the one. But, the description says this api only supports Bluetooth 4.0 low energy devices. Did anyone try doing the same thing? I want to support current popular bluetooth headsets, or bluetooth enabled steering wheel on the car. I don't know if it's worth trying when it only supports some brand new bluetooth.

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• QML 5.3 iOS compilation of pure QML app

  - by Nathaniel Johnson

  I have an application written in QML. Initially, I used the standard C++ bootstrap for the app. int main(int argc, char *argv[]) { QApplication app(argc, argv); // A bunch of components and data models written in C++ QQmlApplicationEngine engine; engine.load(QUrl(QStringLiteral("qrc:///main.qml"))); return app.exec(); } The bulk of the app is in QML and the more I work with QML, the happier I am with it and the more I feel comfortable converting the C++ pieces to QML. So, it comes to one risk that I wanted to ask about. If I convert the app to a pure QML application like the kind generated by the Qt Quick UI application wizard with no C++ and designed to be run with qmlscene will I be able to compile it for iOS when the time to port it comes or will I end up just converting it back to the C++ loader form? TL;DR Can pure QML (no C++) apps be compiled and run on iOS devices?

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• What are good educational resources for setting up .Net Webservice on a DMZ connecting to SQL Server

  - by Brian

  We are going to begin implementing a web service that will be hosted on a DMZ server. This web server will post data to a SQL server and we're trying to determine the best methodology to handle this. Things that concern us are web service authentication, SOAP, and whether or not to store the database on the DMZ or the local network. This same scenario will apply to ASP.Net apps. Trust me, I've already searched the web, but as usual, the online resources I've found either talk about just authentication, or just about SOAP, or etc, but does not show or suggest how the entire system can work together. Can you give me a list of resources such as links that I've missed, books, classes, or etc that would help? Thank You.

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• Geocoding autocomplete bias not working

  - by chris

  I'm using the following code to get the autocomplete functionality for an address input box using Google Maps API v3: function initializeAutocomplete() { var defaultBounds = new google.maps.LatLngBounds( new google.maps.LatLng(1.484016,103.575212), new google.maps.LatLng(1.233592,104.033618)); var input = document.getElementById('destStreet'); var myOptions = {bounds: defaultBounds, types: ['geocode']}; autocomplete = new google.maps.places.Autocomplete(input, myOptions); } The problem is that biasing doesn't seem to work as the first results are usually not relevant to the defined bounds (a country). I've seen a few apps working fine, so I'm wondering where the problem is. I came across the JQuery autocomplete plugin (http://code.google.com/p/geo-autocomplete/) which would seem like a good alternative since it has a region filter, but I'm unable to "install it" or use it because of my very limited knowledge (I learn by example). Could you please help me getting more relevant results with the above code or guide me through the implementation of the JQuery alternative? Of course I'm very open to other suggestions as well.

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• Do I need to rebuild application after adding a new iPhone in ad hoc distribution?

  - by RaYell

  I'm using Ad Hoc distribution to send preview/beta version of my iPhone apps to customers for approval. I'm always sending a zipped application and mobileprovision files. Sometimes however I encountered situation when nothing in the application changed but we needed to add a new device for testing. I've added a device in Provisioning portal and assigned it to a provisioning profile my application uses for ad hoc distribution. I've downloaded new mobileprovision file and imported it to xcode now the question is do I need to rebuild the application to enable the app on a new device or would it be enough to just send old build with updated mobileprovision file?

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• how to install SystemTap on Ubuntu

  - by jeevan thapa

  I am new to Ubuntu. I follow the instruction from http://sourceware.org/systemtap/wiki/SystemtapOnUbuntu that is necessary to install SystemTap on Ubuntu. I lost in Step 4. How can i run step 4: ? Setp 4: sudo apt-get install elfutils, for eu-readelf Then run this script as root, whenever you install additional debug symbols for file in `find /usr/lib/debug -name '*.ko' -print` do buildid=`eu-readelf -n $file| grep Build.ID: | awk '{print $3}'` dir=`echo $buildid | cut -c1-2` fn=`echo $buildid | cut -c3-` mkdir -p /usr/lib/debug/.build-id/$dir ln -s $file /usr/lib/debug/.build-id/$dir/$fn ln -s $file /usr/lib/debug/.build-id/$dir/${fn}.debug done This makes available the module probes available and is friendly to other debug symbol savvy apps like gdb and oprofile. This convention should make it's way into Ubuntu in the near future.

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• Generate non-identity primary key

  - by MikeWyatt

  My workplace doesn't use identity columns or GUIDs for primary keys. Instead, we retrieve "next IDs" from a table as needed, and increment the value for each insert. Unfortunatly for me, LINQ-TO-SQL appears to be optimized around using identity columns. So I need to query and update the "NextId" table whenever I perform an insert. For simplicity, I do this immediately creating the new object. Since all operations between creation of the data context and the call to SubmitChanges are part of one transaction, do I need to create a separate data context for retrieving next IDs? Each time I need an ID, I need to query and update a table inside a transaction to prevent multiple apps from grabbing the same value. Is a separate data context the only way, or is there something better I could try?

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• making use of c++ to speed up php

  - by Ygam

  I saw this post on Sitepoint quoting a statement by Rasmus Lerdorf which goes (according to Sitepoint) as follows: "How can you make PHP fast? Well, you can’t" was his quick answer. PHP is simply not fast enough to scale to Yahoo levels. PHP was never meant for those sorts of tasks. "Any script based language is simply not fast enough". To get the speed that is necessary for truly massive web systems you have to use compiled C++ extensions to get true, scaleable architecture. That is what Yahoo does and so do many other PHP heavyweights. Intrigued by the statement (not to mention the fact that up to now, all I was doing in PHP was small database-based apps), I was wondering how I could "use compiled C++ extensions" with PHP. Any ideas or resources?

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• Grails application hogging too much memory

  - by RN

  Tomcat 5.5.x and 6.0.x Grails 1.6.x Java 1.6.x OS CentOS 5.x (64bit) VPS Server with memory as 384M export JAVA_OPTS='-Xms128M -Xmx512M -XX:MaxPermSize=1024m' I have created a blank Grails application i.e simply by giving the command grails create-app and then WARed it I am running Tomcat on a VPS Server When I simply start the Tomcat server, with no apps deployed, the free memory is about 236M and used memory is about 156M When I deploy my "blank" application, the memory consumption spikes to 360M and finally the Tomcat instance is killed as soon as it takes up all free memory As you have seen, my app is as light as it can be. Not sure why the memory consumption is as high it is. I am actually troubleshooting a real application, but have narrowed down to this scenario which is easier to share and explain.

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• How do I authenticate a Twitter user and access the API without leaving my iPhone app?

  - by thebossman

  I'd like to allow users to send out Tweets from my iPhone app. That's all the functionality I need at the moment. From what I know of the Twitter API, there's a standard authentication mechanism, which allows the developer to include the user's name and password in the request string that the application sends to Twitter. This method will no longer be supported come June 30, 2010. Given the timeframe, the better other choice is oAuth. One of the caveats of oAuth is that it requires a UIWebView to pop up within the app to allow the user to enter his or her credentials or a PIN number. None of the Twitter apps on my phone do this, however: Tweetie, TweetDeck and Twitterific. I assume they're using the first authentication method, but it seems like Twitter wouldn't deprecate an API that would hurt the user experience across the board. There must be an alternative method--what am I missing?

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• Alternative to BerkeleyDB?

  - by John

  I'm looking for a dbm-like library that I can use in place of Berkeley DB, which I'm currently using. My main reason for switching is the licensing fees for BDB are pretty high (free for open source apps, but my employer does not want to open source this particular app for various reasons). I've looked briefly at qdbm but it doesn't look like it will fill my needs -- lots of keys (several million) and large data items ( 1-5 megabytes). Before I continue my search I figured I'd ask because it seems there are tons of dbm-like libraries out there.

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• How to utilize network for p2p file sharing on Android Platform?

  - by CSharperWithJava

  I'm working on some apps for the android platform and I have two problems that I'm not quite sure how to approach, and both are closely related. How can I send a relatively small data file from one android device to another (preferably over the internet or directly through wireless network)? Is it possible to create a temporary p2p live data stream from one android device to another? An example application would be to stream low-res video from phone A's camera to phone B, or audio. I would much appreciate being pointed in the right direction on either issue (File transfer or real time data transfer).

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• iphone - Can't uninstall app on device

  - by wallou

  hey guys, I am testing my app on my jailbreaked iPhone and i noticed something strange. When i want to uninstall it on device i got no cross to delete the app. All the other apps (not mines) have the white circled cross. Whereas on the simulator i am able to delete my app. Is it because i run it on a jailbreak with a codesign workaround? Or maybe i am missing something in the app plist. Let me know if you have a clue. Wallou

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• Related objects in reportingviewer 10.0.0.0 give #error

  - by Bart-Jan Poirot

  In my VB.net apps i make use of Linq2SQL and Reportviewer with RDLC reports. With Visual Studio 2010 they upgraded this reportviewer component so you can use the newer RDL specification from 2008. Now I've a problem to show related objects. For example assume you provide an order to the datasource of the report and then you can show something like Fields!Customer.Value.Name where Customer is a related entity. I also got the error in my immediate window: *Warning: The Value expression for the textrun ‘Name_1.Paragraphs[0].TextRuns[0]’ contains an error: The specified operation is not valid. (rsRuntimeErrorInExpression)*

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• iPad crashes that aren't happening on iPhone or iPod Touch

  - by alyoshak

  Has anyone had difficulty getting what has otherwise been a solid iPhone app working on the iPad? I was under the impression that iPhone apps would run without problems on the iPad. We are are experiencing crashes (not intermittent - same place, at same time) that we've never gotten on the iPhone or iPod Touch. I have become suspicious that the crashes are memory-management related, but even if so, why only on the iPad? 2010-05-17 10:19:06.474 ASSIST[82:207] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UISectionRowData 0x6041480> valueForUndefinedKey:]: this class is not key value coding-compliant for the key deliveryDate.' 2010-05-17 10:19:06.481 ASSIST[82:207] Stack: ( 852041337, 861292157, 852040861, 850755255, 850750995, 850758945, 81279, 123007, 126693, 149141, 851599725, 827486573, 827486477, 827486431, 827485745, 827487359, 827454123, 851903137, 851590065, 851588321, 819339483, 819339655, 827151561, 827144691, 9461, 9324 ) terminate called after throwing an instance of 'NSException' Program received signal: “SIGABRT”.

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• https://www.googleapis.com/drive/v2/files/<fileid>/comments?alt=json returned "Not Found" on a file that can't be opened

  - by Kartik Ayyar

  More details as below: https://www.googleapis.com/drive/v2/files/1iNMGIAFXuhS_CO_hnEO0_EJ9PAgT-hXYqWYv0MPGUTI/comments?alt=json returned "Not Found The file is present in drive and shows in drive.changes.list, but can't be opened in Google Drive either. There are two problems here a) the file is somehow corrupt ( it was a document imported into drive, so that failed, but that isn't something I care about for the purposes of this question ) b) The file shows up as existing in some API calls, but calls to read comments with the Drive SDK comments API fail. Here are results from an API call showing how the file does indeed exist: "file": { "kind": "drive#file", "id": "1iNMGIAFXuhS_CO_hnEO0_EJ9PAgT-hXYqWYv0MPGUTI", "etag": "\"o35FABD0TC3H-Up3OL3UA9kEB2w/MTM3MTc2NzU5NzEyNA\"", .... .... "iconLink": "https://ssl.gstatic.com/docs/doclist/images/icon_11_document_list.png", "title": "<removed>", "mimeType": "application/vnd.google-apps.document", "labels": { "starred": false, "hidden": false, "trashed": true, "restricted": false, "viewed": true },

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• Facebook Open Graph Not Showing Object Title

  - by gregavola

  I'm having conflicting reports for our users that people that share Object Graph objects to their wall, are sometimes showing the Object title and other times not. Specifically, every test I do on my own account shows the Object Title, but on their Mobile apps - it doesn't appear. I've tested the Open Graph debugger.So I have a couple of questions: Is there a length limit on the number of characters? Does Facebook not show the whole Object.title on Mobile? Does Facebook scrap the OG tags and if it can't find them or if it timeout do they not receive them? Here is my sample OG url: https://untappd.com/user/gregavola/checkin/35486976 Response from FB: Post on my Wall: What can I do here? What am I missing?

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