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• How is Sencha Touch performing on Android in practice ?

  - by Vidar Vestnes

  Hi I'm just about to start a project using Sencha Touch, and just done some minor testing on my HTC desire device. All tutorial videos at Vimeo seems to be using an iPhone emulator running on a Mac. Im not sure how fast this emulator is compared to a real iPhone device or even an real Android device, but from what i have experienced, it seems that my HTC desire is not performing that nicly as this emulator. All animations (sliding, fading, etc) seems abit laggy. You can easily notice that the FPS is much less than on the Vimeo videos. HTC desire is a relativly new and modern Android 2.2 phone, running with decent hardware, so im wondering if Sencha Touch is "ready" for the Android platform. Anybody with practical experience with Android and Sencha Touch ?

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• 7-Eleven Mobile App Powered by Oracle SOA Suite

  - by Bruce Tierney

  When you slurp that Slurpee, do you ever think about the sub 100 millisecond processing of 20 million 7-Eleven digital transactions ever day supported by Oracle SOA Suite?  Maybe next time.  Check out this impressive video of Ronald Clanton, 7-Eleven's Digital Guest Experience Program Manager, describing how 7-Eleven provides a consistent view across all the end points of over 10,000 stores and their digital entities by using Oracle SOA Suite on Oracle Exalogic.  Managed by Oracle Enterprise Manager, they were able to provision their "Rapid-Fire" Middleware as a Service (MWaaS) in only "10 minutes" and deliver on time and complete testing ahead of schedule. So what are you waiting for?  Download your Slurpee App to get your free Pillsbury Cinnamon pastry and enjoy your contribution to the 20 million messages/day.   When your done, take picture of your tongue...red or blue?  Watch the video here:

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• Online iPad 1&2 emulators give different results compared to the real thing

  - by Systembolaget

  I'm designing a centered website (jQuery Isotope). Thre sandbox is here. I have used some online iPad 1&2 emulators to test how the site is viewed on these devices. Then, I managed to get hold of the real thing. Result: on real iPads, the site is centered and the layout adjusts automatically as expected. In online iPad emulators, the site is not quite centered and additional Isotope elements are squeezed in. Of course, I trust the real thing more than online emulators, but why is this happening? To me, it feels like website testing with online emulators is not so reliable after all? If this question is wrong here, please move it or tell me where it should go. SO is about programming, this question isn't. Thanks!

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• All Access Pass to Oracle Support

  - by Leslie-Oracle

  Untitled Document Looking for tips, recommendations and resources to help you keep your Oracle applications and systems running at peak performance? Want to find out how to get more out of your Oracle Premier Support coverage? More than 500 experts from across Services and Support will be on hand at Oracle OpenWorld to answer your questions and share best practices for adopting and optimizing Oracle technology. Find out what Oracle experts know about the best tools, tips and resources for supporting and upgrading Oracle technology. Attend one of our “Best Practices” sessions. Stop by the Oracle Support Stars Bar to talk with support experts. Open daily @ Moscone West, Exhibition hall 3161. See Oracle support tools in action at one of our demos. View the schedule of all of our Oracle Premier Support activities at Oracle OpenWorld for more information. See you there!

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• SQL Server Express Profiler

  - by David Turner

  During a recent project, while waiting for our Development Database to be provisioned on the clients corporate SQL Server Environment (these things can sometimes take weeks or months to be setup), we began our initial development against a local instance on SQL Server Express, just as an interim measure until the Development database was live.  This was going just fine, until we found that we needed to do some profiling to understand a problem we were having with the performance of our ORM generated Data Access Layer.  The full version of SQL Server Management Studio includes a profiler, that we could use to help with this kind of problem, however the Express version does not, so I was really pleased to find that there is a freely available Profiler for SQL Server Express imaginatively titled ‘SQL Server Express Profiler’, and it worked great for us.  http://sites.google.com/site/sqlprofiler/

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• DevExpress Wins #1 Publisher Award

  Thanks to loyal and awesome customers like you, DevExpress recently won several bestseller awards from Component Source. This morning at TechEd 2010, Chris Brooke from Component Source dropped by to present the top #1 Publisher award: Thanks for your support! DXperience? What's That? DXperience is the .NET developer's secret weapon. Get full access to a complete suite of professional components that let you instantly drop in new features, designer styles and fast performance for...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Why "Fork me on github"?

  - by NoBugs

  I understand how Github works, but one thing I've been confused about is, why almost every OSS project lately has a "Fork me on Github" link on their homepage. For example, http://jqtjs.com/, http://www.daviddurman.com/flexi-color-picker/, and others. Why is this so common? Is it that they want/need code validation, checking for security/performance improvements that they may not know how to do? Is it meant to show that this is a collaborative project - you're welcome to add improvements? Do they work for Github, or want to promote their service? Oddly enough, I don't think I've seen a "Fork project on Bitbucket" logo recently. My first reaction to that logo was that the project probably needs to be modified (forked) in order to integrate it with anything useful - or that they are encouraging fragmented codebase, encouraging everyone to make their own fork of the project. But I don't think that is the intent.

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• Public Cloud, co-location and managed services ... what is the cloud?

  - by llaszews

  Recently I have had conversation with a number of people that are selling and implementing 'cloud' solutions. I put cloud in quotes as implementations like co-location (aka co-lo) and managed services (sometimes referred to as 'your mess for less') have become popular options for companies moving to the cloud. These are obviously not pure public cloud offerings and probably more of hybrid cloud implementations as the infrastructure (PasS and IaaS)is dedicated to a specific customer. This eliminates the security, multi-tenancy, performance and other concerns that companies have regarding public cloud. Are co-location and managed services cloud to you? Are they something your company is considering when you think about cloud ?

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• Learning Programming, Suggestions for a roadmap

  - by RisingSun

  Hi, Some background first- I am new to programming and have discovered it rather late in life; Like many hobbyists, my introduction to the subject has been through php/jquery (yes, i know the popular mood around here... they-are-not-real-programminng-languages ;-) ). I like to believe that I am reasonably competent at what I do in my other life and this developing addiction to coding has taken a very heavy toll on my professional prospects. This is the question: What programming languages next? (No plans to ditch php in the immediate future, that will involve rewriting much of my code) Any absolutely essential books I must read? Is it necessary to join a college/university course? Do I need to ditch my other profession to continue serious learning? My goals are: Develop a solid understanding of the science and art of programming. Continue to work on my own web application (Hands on learning suits me best) I am something of a generalist interested in everything from UI to database performance

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• is there any elegant way to analyze an engineer's process?

  - by NewAlexandria

  Plenty of sentiment exists that measuring commits is inappropriate. Has any study been done that tries to draw in more sources than commits - such as: browsing patterns IDE work (pre-commit) idle time multitasking I can't think of an easy way to do these measures, but I wonder if any study has been done. On a personal note, I do believe that reflection on one's own 'metrics' could be valuable regardless of (or in the absence of) using these for performance eval. I.E. an un-biased way to reflect on your habits. But this is a discussion matter beyond Q&A.

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• How to Switch from 4G LTE to 3G on the New iPad to Save Battery Life

  - by The Geek

  Whether you live somewhere without 4G coverage, you live in a bad coverage zone, or you just want to conserve some battery life, it’s extremely simple to disable 4G / LTE on the new 3rd generation iPad and switch to 3G instead, which uses less battery life. Note: We’ve not done formal testing yet to figure out how much battery life you might save, but there’s no question that 4G LTE technology uses a lot more battery overall, and it’s useful to know that you can disable it. Make Your Own Windows 8 Start Button with Zero Memory Usage Reader Request: How To Repair Blurry Photos HTG Explains: What Can You Find in an Email Header?

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• Synonyms for different languages in LibreOffice Writer? [closed]

  - by cipricus

  Possible Duplicate: How do I add English-UK thesaurus in LibreOffice? When setting a text for English US the context menu contains 'Synonyms' This is not the case for the other languages for which I have the spelling installed (English UK, French etc) Can I have the Synonyms option for UK English too, for example? Even that is a problem although there seems to be solutions around for it. Here, for example, (which is a link to here) but after testing it cannot see synonyms for uk. Also this which was reported as a solution is not working anymore it seems. What about other languages? (Please notice that this question is not just about English-UK. I have initially noticed that 'synonyms' where missing in relation to British, but I am asking about how to solve the issue in general or, when there is no general solution, how to solve it on a case-by-case basis. For the meta consequence of all this, involving the issue of it being a duplicate, see comments under here and this question.)

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• How can I view localized versions of my site?

  - by Max Vernon

  We are adding internationalization to our site. We are getting the client's IP address from the headers and looking it up against the IP2location database to get the client's country. Several of our clients reported seeing a blank page over the weekend. We'd like to be able to get screenshots or use a browser from many different countries on an ongoing basis for testing code changes. I need to know what the site looks like when accessed from various countries since there are several elements that vary by country. I've used Tor and Vidalia, along with the Tor customized Firefox browser however it appears the CSS is getting mangled. I have also used http://webpagetest.org to check the site, however the screenshot it gives is too small to be really useful. Is there a site or a service I can use to get screenshots or interact with my website from various countries?

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• Do you use to third party companies to review your company's code?

  - by CodeToGlory

  I am looking to get the following - Basic code review to make sure they follow the guidelines imposed. Security code analysis to make sure there are no loopholes. No performance bottlenecks by doing a load test etc. We have lot of code coming in from third parties and is becoming laborious to manage code reviews and hence looking to see if others employ such practices. I understand that it may be a concern for some and would raise the question "Well, who is going to make sure the agency is doing their job right?" But basically I am just looking for a third party who can hold all vendor code to the same standards.

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• Is there a point to writing in C or C++ instead of C# without knowing specifically what would make a program faster?

  - by user828584

  I wrote a small library in Python for handling the xbox 360's STFS files to be used on my web applications. I would like to rewrite it for use in the many desktop programs people are writing for 360 game modding, but I'm not quite if I should continue using C# or delve into C++ or even C. STFS is an in-file file system used by the xbox 360 and the job of the library would be extracting/injecting files, which could take noticeable amounts of time to do. What I know in C# comes from internet tutorials and resources, as would anything I learn about C++, so what I'm asking is if it's better to bring myself to a slightly lower-level language without knowing beforehand the features of the language that increase performance, or continue assuming that compiler optimizations and that my lack of experience will mean that the language I choose won't matter.

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• The Ultimate Nexus 7 Troubleshooting Guide: 6 Potential Problems and How to Fix Them

  - by Chris Hoffman

  Have you had any issues with your Nexus 7? We’ve run into quite a few problems and fixed them all – from bad performance and touch-screen responsiveness issues to tablets that won’t power on and separating screens. Some of these problems may not be common – or may be fixed with newer hardware or software updates — but they’re all problems we’ve run into. We’ve collected the solutions here so you don’t have to dig through forum posts. Secure Yourself by Using Two-Step Verification on These 16 Web Services How to Fix a Stuck Pixel on an LCD Monitor How to Factory Reset Your Android Phone or Tablet When It Won’t Boot

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• Why ISVs Run Applications on Oracle SuperCluster

  - by Parnian Taidi-Oracle

  Michael Palmeter, Senior Director Product Development of Oracle Engineered Systems, discusses how ISVs can easily run up to 20x faster, gain 28:1 storage compression, and grow presence in the market all without any changes to their code in this short video. One of the family of Oracle engineered systems products, Oracle SuperCluster provides maximum end-to-end database and application performance with minimal initial and ongoing support and maintenance effort, at the lowest total cost of ownership. Java or enterprise applications running on Oracle Database 11gR2 or higher and Oracle Solaris 11 can run up to 20X faster than traditional platforms on Oracle SuperCluster without any changes to their code.  Large number of customers are consolidating hundreds of their applications and databases on Oracle SuperCluster and are requiring their ISVs to support it. ISVs can become Oracle SuperCluster Ready and Oracle SuperCluster Optimized by joining the Oracle Exastack program. 

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• Discussion of a Distributed Data Storage implementation

  - by fegol

  I want to implement a distributed data storage using a client/server architecture. Each data item will be stored persistently in disk in one of several remote servers. The client uses a library to update and query the data, shielding the client from its actual location. This should allow a client to associate keys (String) to values(byte[]), much as a Map does. The system must ensure that the amount of data stored in each server is approximately the same. The set of servers is known beforehand by other servers and clients. Both the client and the server will be written in Java, using sockets, threads, and files. I open this topic with the objective of discussing the best way to implement this idea, assuming simplicity, what are the issues of this implementation, performance measurements and discussion of the limitations.

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• Update drivers for TL-WN851ND

  - by Tony_GPR

  Today I bought a new PCI wireless card, TP-Link WN851ND, with Atheros AR9227 chipset. It has 2 antennas and is compatible with Wifi N so I thought it would improve the quality of the signal. But after install it on my computer the result is the opposite to expected. It doesn't connect to my network, while my old Wifi BG card connect without problems, I created an access point from my smartphone to try the card, and work, but is very slow loading pages. In Windows 7 works perfectly, so I think the problem is the driver. I have Ubuntu 12.04 LTS with kernel 3.2.0.31, is there a way to update the driver or I can apply a patch to improve the performance of the card? Otherwise, anyone know if there is a work in progress to improve compatibility with this chipset, or is it better to change the card and buy one with better driver compatibility. And finally, which wireless N compatible chipsets have good support under Linux/Ubuntu?

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• WMemoryProfiler is Released

  - by Alois Kraus

  What is it? WMemoryProfiler is a managed profiling Api to aid integration testing. This free library can get managed heap statistics and memory usage for your own process (remember testing) and other processes as well. The best thing is that it does work from .NET 2.0 up to .NET 4.5 in x86 and x64. To make it more interesting it can attach to any running .NET process. The reason why I do mention this is that commercial profilers do support this functionality only for their professional editions. An normally only since .NET 4.0 since the profiling API only since then does support attaching to a running process. This thing does differ in many aspects from “normal” profilers because while profiling yourself you can get all objects from all managed heaps back as an object array. If you ever wanted to change the state of an object which does only exist a method local in another thread you can get your hands on it now … Enough theory. Show me some code /// <summary> /// Show feature to not only get statisics out of a process but also the newly allocated /// instances since the last call to MarkCurrentObjects. /// GetNewObjects does return the newly allocated objects as object array /// </summary> static void InstanceTracking() { using (var dumper = new MemoryDumper()) // if you have problems use to see the debugger windows true,true)) { dumper.MarkCurrentObjects(); Allocate(); ILookup<Type, object> newObjects = dumper.GetNewObjects() .ToLookup( x => x.GetType() ); Console.WriteLine("New Strings:"); foreach (var newStr in newObjects[typeof(string)] ) { Console.WriteLine("Str: {0}", newStr); } } } … New Strings: Str: qqd Str: String data: Str: String data: 0 Str: String data: 1 … This is really hot stuff. Not only you can get heap statistics but you can directly examine the new objects and make queries upon them. When I do find more time I can reconstruct the object root graph from it from my own process. It this cool or what? You can also peek into the Finalization Queue to check if you did accidentally forget to dispose a whole bunch of objects … /// <summary> /// .NET 4.0 or above only. Get all finalizable objects which are ready for finalization and have no other object roots anymore. /// </summary> static void NotYetFinalizedObjects() { using (var dumper = new MemoryDumper()) { object[] finalizable = dumper.GetObjectsReadyForFinalization(); Console.WriteLine("Currently {0} objects of types {1} are ready for finalization. Consider disposing them before.", finalizable.Length, String.Join(",", finalizable.ToLookup( x=> x.GetType() ) .Select( x=> x.Key.Name)) ); } } How does it work? The W of WMemoryProfiler is a good hint. It does employ Windbg and SOS dll to do the heavy lifting and concentrates on an easy to use Api which does hide completely Windbg. If you do not want to see Windbg you will never see it. In my experience the most complex thing is actually to download Windbg from the Windows 8 Stanalone SDK. This is described in the Readme and the exception you are greeted with if it is missing in much greater detail. So I will not go into this here.   What Next? Depending on the feedback I do get I can imagine some features which might be useful as well Calculate first order GC Roots from the actual object graph Identify global statics in Types in object graph Support read out of finalization queue of .NET 2.0 as well. Support Memory Dump analysis (again a feature only supported by commercial profilers in their professional editions if it is supported at all) Deserialize objects from a memory dump into a live process back (this would need some more investigation but it is doable) The last item needs some explanation. Why on earth would you want to do that? The basic idea is to store in your live process some logging/tracing data which can become quite big but since it is never written to it is very fast to generate. When your process crashes with a memory dump you could transfer this data structure back into a live viewer which can then nicely display your program state at the point it did crash. This is an advanced trouble shooting technique I have not seen anywhere yet but it could be quite useful. You can have here a look at the current feature list of WMemoryProfiler with some examples.   How To Get Started? First I would download the released source package (it is tiny). And compile the complete project. Then you can compile the Example project (it has this name) and uncomment in the main method the scenario you want to check out. If you are greeted with an exception it is time to install the Windows 8 Standalone SDK which is described in great detail in the exception text. Thats it for the first round. I have seen something more limited in the Java world some years ago (now I cannot find the link anymore) but anyway. Now we have something much better.

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• Adjusting server-side tickrate dynamically

  - by Stuart Blackler

  I know nothing of game development/this site, so I apologise if this is completely foobar. Today I experimented with building a small game loop for a network game (think MW3, CSGO etc). I was wondering why they do not build in automatic rate adjustment based on server performance? Would it affect the client that much if the client knew this frame is based on this tickrate? Has anyone attempted this before? Here is what my noobish C++ brain came up with earlier. It will improve the tickrate if it has been stable for x ticks. If it "lags", the tickrate will be reduced down by y amount: // GameEngine.cpp : Defines the entry point for the console application. // #ifdef WIN32 #include <Windows.h> #else #include <sys/time.h> #include <ctime> #endif #include<iostream> #include <dos.h> #include "stdafx.h" using namespace std; UINT64 GetTimeInMs() { #ifdef WIN32 /* Windows */ FILETIME ft; LARGE_INTEGER li; /* Get the amount of 100 nano seconds intervals elapsed since January 1, 1601 (UTC) and copy it * to a LARGE_INTEGER structure. */ GetSystemTimeAsFileTime(&ft); li.LowPart = ft.dwLowDateTime; li.HighPart = ft.dwHighDateTime; UINT64 ret = li.QuadPart; ret -= 116444736000000000LL; /* Convert from file time to UNIX epoch time. */ ret /= 10000; /* From 100 nano seconds (10^-7) to 1 millisecond (10^-3) intervals */ return ret; #else /* Linux */ struct timeval tv; gettimeofday(&tv, NULL); uint64 ret = tv.tv_usec; /* Convert from micro seconds (10^-6) to milliseconds (10^-3) */ ret /= 1000; /* Adds the seconds (10^0) after converting them to milliseconds (10^-3) */ ret += (tv.tv_sec * 1000); return ret; #endif } int _tmain(int argc, _TCHAR* argv[]) { int sv_tickrate_max = 1000; // The maximum amount of ticks per second int sv_tickrate_min = 100; // The minimum amount of ticks per second int sv_tickrate_adjust = 10; // How much to de/increment the tickrate by int sv_tickrate_stable_before_increment = 1000; // How many stable ticks before we increase the tickrate again int sys_tickrate_current = sv_tickrate_max; // Always start at the highest possible tickrate for the best performance int counter_stable_ticks = 0; // How many ticks we have not lagged for UINT64 __startTime = GetTimeInMs(); int ticks = 100000; while(ticks > 0) { int maxTimeInMs = 1000 / sys_tickrate_current; UINT64 _startTime = GetTimeInMs(); // Long code here... cout << "."; UINT64 _timeTaken = GetTimeInMs() - _startTime; if(_timeTaken < maxTimeInMs) { Sleep(maxTimeInMs - _timeTaken); counter_stable_ticks++; if(counter_stable_ticks >= sv_tickrate_stable_before_increment) { // reset the stable # ticks counter counter_stable_ticks = 0; // make sure that we don't go over the maximum tickrate if(sys_tickrate_current + sv_tickrate_adjust <= sv_tickrate_max) { sys_tickrate_current += sv_tickrate_adjust; // let me know in console #DEBUG cout << endl << "Improving tickrate. New tickrate: " << sys_tickrate_current << endl; } } } else if(_timeTaken > maxTimeInMs) { cout << endl; if((sys_tickrate_current - sv_tickrate_adjust) > sv_tickrate_min) { sys_tickrate_current -= sv_tickrate_adjust; } else { if(sys_tickrate_current == sv_tickrate_min) { cout << "Please reduce sv_tickrate_min..." << endl; } else{ sys_tickrate_current = sv_tickrate_min; } } // let me know in console #DEBUG cout << "The server has lag. Reduced tickrate to: " << sys_tickrate_current << endl; } ticks--; } UINT64 __timeTaken = GetTimeInMs() - __startTime; cout << endl << endl << "Total time in ms: " << __timeTaken; cout << endl << "Ending tickrate: " << sys_tickrate_current; char test; cin >> test; return 0; }

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• How to set up an informational interview?

  - by Ethel Evans

  I've heard a lot about informational interviews, but don't have the slightest idea how to actually set one up or run one effectively. I work as an SDET (SDE in Test) in an area with lots of great technical companies, and would like to have a better understanding of how different companies do testing. I have three sub-questions: Who would I get in contact with to set up informational interviews at a company that I'd like to learn about? How can I make sure the time is productive? And, how do I keep the interview from being a burden to the employee(s) whom I speak with?

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• Getting Started with Oracle Fusion Human Capital Management

  Designed from the ground-up using the latest technology advances and incorporating the best practices gathered from Oracle's thousands of customers, Fusion Applications are 100 percent open standards-based business applications that set a new standard for the way we innovate, work and adopt technology. Delivered as a complete suite of modular applications, Fusion Applications work with your existing portfolio to evolve your business to a new level of performance. In this AppCast, part of a special series on Fusion Applications, you hear about the unique advantages of Fusion Human Capital Management, learn about the scope of the first release and discover how Fusion HCM modules can be used to complement and enhance your existing HCM solutions.

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• Hack Fest Going Strong!

  - by Yolande Poirier

  Today was the first day of  the Hack Fest at Devoxx, the Java developer conference in Belgium.  The Hack Fest started with the Raspberry Pi & Leap Motion hands-on lab. Vinicius Senger introduced the Java Embedded, Arduino and Raspberry Pi. Java Champion Geert Bevin presented the Leap Motion, a controller sensing your hands and fingers to play games by controlling the mouse as an example. "Programmers are cooler than musicians because they can create entire universe using all senses" explained Geert In teams, participants started building applications using Raspberry Pi, sensors and relays. One team tested the performance of Tomcat, Java EE and Java Embedded Suite on the Raspberry Pi. Another used built an text animation using a LCD screen. Teams are using the Leap Motion to close and open programs on the desktop and other teams are using it as a game control. 

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• Which Compiz plugins can I safely disable?

  - by Sheldno

  On 11.10, which Compiz plugins are enabled by default? I.e. I should leave them enabled for some particular reason. I've imported my Compiz settings from my previous install and so I can't tell. I'd like to disable all unnecessary plugins because I've noticed the potential for interference or performance issues. I don't think I can trust the CCSM feature "Reset to defaults" because when I use it I need to run unity --reset afterwards in order for my desktop to work again (implying that the default values it resets to are not the values that Ubuntu/Unity requires).

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