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  • Slow in the app, fast in SSMS

    - by DavidWimbush
    Users complain about a timeout but when you run the exact same query in SSMS it runs in a flash. Sounds familiar? I've been baffled by this before. I worked out that I was getting a different query plan in SSMS because of different SET OPTIONS but, having dealt with that, I was then stuck with parameter sniffing as the cause of the timeout. I've read about that but still didn't really understand how to fix it. Erland Sommarskorg has published an excellent article (http://www.sommarskog.se/query-plan-mysteries.html) in which he clearly explains what's going on and provides tools and techniques to fix it. Highly recommended reading. Thanks, Erland.

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  • planning the same app for both OSX and iOS

    - by P5music
    I would like to ask which is the best strategy for creating an application that will be developed both on Mac and iPad, so to make minumum effort to port it from one platform to the other, starting from iPad, for example, but rather trying to make both at the same time. The application, in fact, would be an iPad-style one on the Mac too. How should I have to plan the project? Which are the main tricks to easily get the goal?

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  • Facebook Game Rejected: "Your app icon must not overlap with content in your cover image"

    - by peterwilli
    Sorry if this isnt the right stackexchange site to ask this, it was really hard to determine. My FB game just recently got rejected for 2 reasons. The first I fixed nicely and is irrelevant but the second I just can't see to figure out what they mean and I was hoping someone else got the same issue and did know what they meant. These are the errors: You can ignore the error under "Banners" The web preview of my game looks like this now: All I know is that the rejection has something to do with the cover image, not the icons or the screenshots. Please let me know what to do to get approved. Thanks a lot!

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  • Architecture guidelines for a "single page web-app"

    - by Matt Roberts
    I'm going to start a side project to build a "single page" web application. The application needs to be real-time, sending updates to the clients as changes happen. Are there any good resources for best-practice approaches wrt the architecture for these kinds of applications. The best resource I've found so far is the trello architecture article here: http://blog.fogcreek.com/the-trello-tech-stack/ To me, this architecture, although very sexy, is probably over-engineered for my specific needs - although I do have similar requirements. I'm wondering if I need to bother with a sub/pub at the server side, could I not just push updates from the server when something happens (e.g. when the client sends an update to the server, write the update to the db, and then send an update to the clients). Tech-wise, I'm probably looking to build this out in Node.JS or maybe Ruby, although the architecture guidelines should to some extent apply to any underlying server technologies.

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  • iphone app crashing when url connection connection timed out is coming

    - by satyam
    I'm creating iphone app. In that, when the app starts, it connects to server and downloads few images and then proceeds with app. When app is downloading, it will show the initial splash screen. as long as my server is able to ping my iphone, its working well. but the trouble starts when my server is taking much time to respond for the NSURL request. The app is crashing with following error: Mon May 14 13:56:34 unknown Springboard[24] <Warning>: com.xxxx.xxx failed to launch in time I understood that when such issues happen with application, iphone crashes the appliation. I would like to know how much max time iphone allows app to respond to such instances. Is there any max value for that?

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  • Download the Official How-To Geek Trivia App for Windows 8

    - by The Geek
    The new How-To Geek Trivia application has just been approved in the Windows 8 store, so if you’re already running the release preview you can go and download it right now for free. It’ll give you a daily dose of geeky trivia right on your Windows 8 desktop. Click Here to Download Geek Trivia for Windows 8 Each trivia question will present you with the question, and then once you answer, will show you whether you picked the right one as well as the full description. How to Banish Duplicate Photos with VisiPic How to Make Your Laptop Choose a Wired Connection Instead of Wireless HTG Explains: What Is Two-Factor Authentication and Should I Be Using It?

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  • Minimize useless tweaking of a numeric app

    - by Potatoswatter
    I'm developing a numeric application (nonlinear optimizer), with a zillion knobs to tweak and rising. It's not my first foray into this domain, but this time there are even more variables in the code and I'm on a tight schedule. Don't want to waste time fiddling. Days or even months can potentially be wasted adjusting variables, recompiling, and reprocessing benchmark datasets. The resulting data is viewed and trouble spots are checked. The overall quality of the solution is reported by the program but the meaning of the report could change over time. (Numeric units for the report are one thing I'm trying to nail down.) One main problem is organizing result files to identify each with specific code changes. Note taking can be a pain, is there software to help with this? Are there agreed best practices to making this kind of development cycle reliably move forward? The solver package converges to its optimal solution with mechanical determination, but I'm all too familiar with the way an excess of design decisions can mire development.

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  • Transition from web-app development to telecom Integration network (IN) layer development

    - by SIJAR
    How difficult it is for someone who has developed web-application using J2EE, Spring etc technology to develop an application for Telecommunication Integration network (IN) layer, the telecom product is to be developed using SS7 stack, JAIN API, J2EE technology. How vital is the knowledge of telecommunication sector? Does anyone anticipate growth in telecommunication sector, what future lies for web development?

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  • Adaptive Payment with Paypal in Iphone App

    - by user2436477
    I wanted to implement three way transection where there is only one payer but two different receivers. Both receivers will receive predefined percentage of payment. I implemented demo for single sender and single receiver,And it works fine.But i don't know how to implement for three way transection. So do i have to create library by myself ? OR Is there any library for adaptive payment feature?

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  • Identify memory leak in Java app

    - by Vincent Ma
    One important advantage of java is programer don't care memory management and GC handle it well. Maybe this is one reason why java is more popular. As Java programer you real dont care it? After you meet Out of memory you will realize it it’s not true. Java GC and memory is big topic you can get some information in here Today just let me show how to identify memory leak quickly. Let quickly review demo java code, it’s one kind of memory leak in our code, using static collection and always add some object. import java.util.ArrayList;import java.util.List; public class MemoryTest { public static void main(String[] args) { new Thread(new MemoryLeak(), "MemoryLeak").start(); }} class MemoryLeak implements Runnable { public static List<Integer> leakList = new ArrayList<Integer>(); public void run() { int num =0; while(true) { try { Thread.sleep(1); } catch (InterruptedException e) { } num++; Integer i = new Integer(num); leakList.add(i); } }} run it with java -verbose:gc -XX:+PrintGCDetails -Xmx60m -XX:MaxPermSize=160m MemoryTest after about some minuts you will get Exception in thread "MemoryLeak" java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:2760) at java.util.Arrays.copyOf(Arrays.java:2734) at java.util.ArrayList.ensureCapacity(ArrayList.java:167) at java.util.ArrayList.add(ArrayList.java:351) at MemoryLeak.run(MemoryTest.java:25) at java.lang.Thread.run(Thread.java:619)Heap def new generation total 18432K, used 3703K [0x045e0000, 0x059e0000, 0x059e0000) eden space 16384K, 22% used [0x045e0000, 0x0497dde0, 0x055e0000) from space 2048K, 0% used [0x055e0000, 0x055e0000, 0x057e0000) to space 2048K, 0% used [0x057e0000, 0x057e0000, 0x059e0000) tenured generation total 40960K, used 40959K [0x059e0000, 0x081e0000, 0x081e0000) the space 40960K, 99% used [0x059e0000, 0x081dfff8, 0x081e0000, 0x081e0000) compacting perm gen total 12288K, used 2083K [0x081e0000, 0x08de0000, 0x10de0000) the space 12288K, 16% used [0x081e0000, 0x083e8c50, 0x083e8e00, 0x08de0000)No shared spaces configured. OK let us quickly identify it using JProfile Download JProfile in here  Run JProfile and attach MemoryTest get largest size of  Objects in Memory View in here is Integer then select Integer and go to Heap Walker. get GC Graph for this object  Then you get detail code raise this issue quickly now.  That is enjoy it.

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  • Best Persistence choice for J2EE-App with frequently changing Data Model

    - by Ben-G
    Whenever I develop a J2EE-Application, I at some point decide to switch from my dummy Persistence (Simply Using Lists and other Data Structures) to some Sort of Database Persistence. Mostly when I hope the Data Model is more or less complete. From this point on, changes to the data model become exhausting, but unluckily they occur rather often. I've used different Object-Relational-Mappers (iBatis, Hibernate) for my projects. They definitely reduce the pain coming with Data Model changes, but they anyway let me adjust code/configuration at 3 or 4 places for every single change. To me, that's cumbersome and error prone. I made a better experience with DB4O, which simply persists Java Objects as they are, but I believe it's performance does not scale for huge applications. Is there anyway to maintain performance while letting out all the ugly configuration work? I'm seeking a performant framework which really hides persistence from my code. Wish for thinking? Or am I missing out THE technology? Hope you can help.

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  • SEO for single-page content-less Web App

    - by brillout.com
    as written in the title the website on which I try to do Search Engine Optimization has following two properties: doesn't have any content in the SEO sense: it doesn't hold any information and only offers functionality consists of only one page/URL since most of the SEO tips/tricks I read are based on content how do I perform SEO optimization on such a website? for more info: the website is basically just a timer/alarm/stopwatch

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  • Recreate JoliCloud app list

    - by Josh
    I was wondering if there was any tutorial on how to recreate the pagination system used on JoliCloud. The system shows the amount of pages at the bottom along with what page you are on. It is kind of like the iOS springboard. I would like for it to get the apps via a MySQL query, but that's besides the point. I've searched Google and have found no answers on how to do this. A screen shot of the pagination system is below.

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  • iPhone app quits on launch

    - by Brammie
    I created an app using the 3.1.2 toolchain on linux.. it compiles and links normally, and in the makefile i upload my app (something) like this: @scp ./blabla [email protected]/Applications/Helloworld.app/ @ssh [email protected] "cd /Applications/Helloworld.app; ldid -S Helloworld_; killall; springBoard" when i launch my app it immediatly quits. according to google ldid failed, so i tried to do it manually. ldid did give an error, but after rebooting the error was fixed. The app still doesn't launch. the weird part of my problem is that an example i had DID work, but doesn't work anymore now. (p.s. i built the toolchain by following this guide)

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  • Interacting with scene from controller/app delegate cocos2d

    - by cjroebuck
    I'm attempting to make my first cocos2d (for iphone) multiplayer game and having difficulty understanding how to interact with a scene once it is running. The game is a simple turn-based one and so I have a GameController class which co-ordinates the rounds. I also have a GameScene class which is the actual scene that is displayed during a round of the game. The basic interaction I need is for the GameController to be able to pass messages to the GameScene class.. such as StartRound/StopRound etc. The thing that complicates this is that I am loading the GameScene with a LoadingScene class which simply initialises the scene and replaces the current scene with this one, so there is no reference from GameController to GameScene, so passing messages is quite tricky. Does anyone have any ways to get around this, ideally I would still like to use a Loading class as it smooths out the memory hit when replacing scenes.

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  • SEO: Single URL rewrite from one app to another

    - by user1909186
    I have two web applications running on two different servers. I want one, example.com/hello, to redirect to the second, hello.com. But I want both to contribute to each other's SEO ranking. What is the best way to accomplish this primarily for google search and for other search engines? I currently do a rewrite with permanent from example.com/hello to hello.com using nginx. Thanks for your help

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  • Monitoring settings in a configsection of your app.config for changes

    - by dotjosh
    The usage:public static void Main() { using(var configSectionAdapter = new ConfigurationSectionAdapter<ACISSInstanceConfigSection>("MyConfigSectionName")) { configSectionAdapter.ConfigSectionChanged += () => { Console.WriteLine("File has changed! New setting is " + configSectionAdapter.ConfigSection.MyConfigSetting); }; Console.WriteLine("The initial setting is " + configSectionAdapter.ConfigSection.MyConfigSetting); Console.ReadLine(); } }  The meat: public class ConfigurationSectionAdapter<T> : IDisposable where T : ConfigurationSection { private readonly string _configSectionName; private FileSystemWatcher _fileWatcher; public ConfigurationSectionAdapter(string configSectionName) { _configSectionName = configSectionName; StartFileWatcher(); } private void StartFileWatcher() { var configurationFileDirectory = new FileInfo(Configuration.FilePath).Directory; _fileWatcher = new FileSystemWatcher(configurationFileDirectory.FullName); _fileWatcher.Changed += FileWatcherOnChanged; _fileWatcher.EnableRaisingEvents = true; } private void FileWatcherOnChanged(object sender, FileSystemEventArgs args) { var changedFileIsConfigurationFile = string.Equals(args.FullPath, Configuration.FilePath, StringComparison.OrdinalIgnoreCase); if (!changedFileIsConfigurationFile) return; ClearCache(); OnConfigSectionChanged(); } private void ClearCache() { ConfigurationManager.RefreshSection(_configSectionName); } public T ConfigSection { get { return (T)Configuration.GetSection(_configSectionName); } } private System.Configuration.Configuration Configuration { get { return ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); } } public delegate void ConfigChangedHandler(); public event ConfigChangedHandler ConfigSectionChanged; protected void OnConfigSectionChanged() { if (ConfigSectionChanged != null) ConfigSectionChanged(); } public void Dispose() { _fileWatcher.Changed -= FileWatcherOnChanged; _fileWatcher.EnableRaisingEvents = false; _fileWatcher.Dispose(); } }

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  • Mobile App Notifications in the Enterprise Space: UX Considerations

    - by ultan o'broin
    Here is a really super website of UX patterns for Android: Android Patterns. I was particularly interested in the event-driven notification patterns (aka status bar notifications to developers). Android - unlike iOS (i.e., the iPhone) - offers a superior centralized notifications system for users.   (Figure copyright Android Patterns)   Research in the enterprise applications space shows how users on-the-go, prefer this approach, as: Users can manage their notification alerts centrally, across all media, apps and for device activity, and decide the order in which to deal with them, and when. Notifications, unlike messages in a dialog or information message in the UI, do not block a task flow (and we need to keep task completion to under three minutes). See the Anti-Patterns slideshare presentation on this blocking point too. These notifications must never interrupt a task flow by launching an activity from the background. Instead, the user can launch an activity from the notification. What users do need is the ability to filter this centralized approach, and to personalize the experience of which notifications are added, what the reminder is, ability to turn off, and so on. A related point concerning notifications is when used to provide users with a record of actions then you can lighten up on lengthy confirmation messages that pop up (toasts in the Android world) used when transactions or actions are sent for processing or into a workflow. Pretty much all the confirmation needs to say is the action is successful along with key data such as dollar amount, customer name, or whatever. I am a user of Android (Nexus S), BlackBerry (Curve), and iOS devices (iPhone 3GS and 4). In my opinion, the best notifications user experience for the enterprise user is offered by Android. Blackberry is good, but not as polished and way clunkier than Android’s. What you get on the iPhone, out of the box, is useless in the enterprise. Technorati Tags: Android,iPhone,Blackerry,messages,usablility,user assistance,userexperience,Oracle,patterns,notifications,alerts

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