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  • Demonstrate bad code to client?

    - by jtiger
    I have a new client that has asked me to do a redesign of their website, an ASP.NET Webforms application that was developed by another consultant. It seemed straight-forward (it never is) but I took a look at the code to make sure I knew what I was in for. This application was not written well. At all. It is extremely vulnerable to SQL Injection attacks, business logic is spread throughout the entire application, a lot of duplication, and dead end code that does nothing. On top of that, it keeps throwing exceptions that are being smothered, so it all appears to be running smoothly. My job is to simply update the html and css, but much of the html is being generated in business logic and would be a nightmare for me to sort everything out. My estimates on the redesign were longer than the client was aiming for, and they are asking why so long. How can I explain to my client just how bad this code is? In their mind, the application is running great and the redesign should be a quick one-off. It's my word against the previous consultant, so how can I actually give simple, concrete examples that a non-technical client would understand?

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  • Easily Close All Tabs in Google Chrome

    - by Asian Angel
    Do you find yourself with a lot of tabs open but dread closing all but one manually? Now you can close all of your tabs with a single click, and have just one ready to go with the Close all Tabs extension. Before We all find ourselves with a lot of tabs open sooner or later. That is not so bad until we realize that we need to close all of them and get back to work. A person could open a new tab and manually close the rest or close the entire window and restart Chrome. But a single click solution would be a lot more convenient. After There it is…the single click solution. Just click the Toolbar Button and BOOM! One fresh window with a single new tab page showing. Now if you could only take the rest of the day off… Conclusion The Close all Tabs extension may not be something that everyone would use, but if you are tired of manually closing all of those tabs then you will definitely like it. Links Download the Close all Tabs extension (Google Chrome Extensions) Similar Articles Productive Geek Tips Focused New Tabs Quick-Fix for Google ChromeVisually Browse Through Your Open Tabs in Google ChromeMake Google Chrome Open with Pinned TabsStupid Geek Tricks: Compare Your Browser’s Memory Usage with Google ChromeEasily Control a Large Amount of Tabs in Google Chrome TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips Acronis Online Backup DVDFab 6 Revo Uninstaller Pro Registry Mechanic 9 for Windows Fun with 47 charts and graphs Tomorrow is Mother’s Day Check the Average Speed of YouTube Videos You’ve Watched OutlookStatView Scans and Displays General Usage Statistics How to Add Exceptions to the Windows Firewall Office 2010 reviewed in depth by Ed Bott

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  • Exempt programs from using active VPN connection

    - by Oxwivi
    When I connect to a VPN, all my network traffic is automatically routed through it. Is there a way to add exemptions to that? I don't know if adding exceptions has anything to do with the VPN protocol, but the VPN I'm using is of the OpenVPN protocol. Speaking of OpenVPN, why is it not installed by default on Ubuntu installs unlike PPTP? I could not get the list of IRCHighWay's servers, and this is the result I get trying to connect on XChat with running the bash script running: * Looking up irc.irchighway.net * Connecting to irc.irchighway.net (65.23.153.98) port 6667... * Connected. Now logging in... * You have been K-Lined. * *** You are not welcome on this network. * *** K-Lined for Open proxies are not allowed. (2011/02/26 01.21) * *** Your IP is 173.0.14.9 * *** For assistance, please email [email protected] and include everything shown here. * Closing Link: 0.0.0.0 (Open proxies are not allowed. (2011/02/26 01.21)) * Disconnected (Remote host closed socket). The IP 173.0.14.9 is the one due to my VPN. I had forgotten to check ip route list before running the script, and this is the one after running it: ~$ ip route list 99.192.193.241 dev ppp0 proto kernel scope link src 173.0.14.9 173.0.14.2 via 192.168.1.1 dev eth1 proto static 173.0.14.2 via 192.168.1.1 dev eth1 src 192.168.1.3 192.168.1.0/24 dev eth1 proto kernel scope link src 192.168.1.3 metric 2 169.254.0.0/16 dev eth1 scope link metric 1000 default dev ppp0 proto static Oh and running the script returned this output: ~$ sudo bash irc_route.sh Usage: inet_route [-vF] del {-host|-net} Target[/prefix] [gw Gw] [metric M] [[dev] If] inet_route [-vF] add {-host|-net} Target[/prefix] [gw Gw] [metric M] [netmask N] [mss Mss] [window W] [irtt I] [mod] [dyn] [reinstate] [[dev] If] inet_route [-vF] add {-host|-net} Target[/prefix] [metric M] reject inet_route [-FC] flush NOT supported I ran the script after connecting to the VPN.

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  • ORA-600 Troubleshooting

    - by [email protected]
    Have you observed an ORA-0600 or ORA-07445 reported in your alert log? The ORA-600 error is the generic internal error number for Oracle program exceptions. It indicates that a process has encountered a low-level, unexpected condition. The ORA-600 error statement includes a list of arguments in square brackets: ORA 600 "internal error code, arguments: [%s], [%s],[%s], [%s], [%s]" The first argument is the internal message number or character string. This argument and the database version number are critical in identifying the root cause and the potential impact to your system.  The remaining arguments in the ORA-600 error text are used to supply further information (e.g. values of internal variables etc).   Looking for the best way to diagnose? There is an ORA-600 Troubleshooter Tool available in My Oracle Support.  This tool will lead you to applicable content in My Oracle Support on the problem and can be used to investigate the problem with argument data from the error message or you can pull out the first 10 or 15 stack pointers from the associated trace file to match up against known bugs. Note 153788.1 ORA-600/ORA-7445 TroubleshooterNote 1082674.1 A Video To Demonstrate The Usage Of The ORA-600/ORA-7445 Lookup Tool [Video] Also, take a quick look at the Master Note for Diagnosing ORA-600 ( MasterNoteORA600.docx) for some tips on diagnosing.

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  • Positioning a sprite in XNA: Use ClientBounds or BackBuffer?

    - by Martin Andersson
    I'm reading a book called "Learning XNA 4.0" written by Aaron Reed. Throughout most of the chapters, whenever he calculates the position of a sprite to use in his call to SpriteBatch.Draw, he uses Window.ClientBounds.Width and Window.ClientBounds.Height. But then all of a sudden, on page 108, he uses PresentationParameters.BackBufferWidth and PresentationParameters.BackBufferHeight instead. I think I understand what the Back Buffer and the Client Bounds are and the difference between those two (or perhaps not?). But I'm mighty confused about when I should use one or the other when it comes to positioning sprites. The author uses for the most part Client Bounds both for checking whenever a moving sprite is of the screen and to find a spawn point for new sprites. However, he seems to make two exceptions from this pattern in his book. The first time is when he wants some animated sprites to "move in" and cross the screen from one side to another (page 108 as mentioned). The second and last time is when he positions a texture to work as a button in the lower right corner of a Windows Phone 7 screen (page 379). Anyone got an idea? I shall provide some context if it is of any help. Here's how he usually calls SpriteBatch.Draw (code example from where he positions a sprite in the middle of the screen [page 35]): spriteBatch.Draw(texture, new Vector2( (Window.ClientBounds.Width / 2) - (texture.Width / 2), (Window.ClientBounds.Height / 2) - (texture.Height / 2)), null, Color.White, 0, Vector2.Zero, 1, SpriteEffects.None, 0); And here is the first case of four possible in a switch statement that will set the position of soon to be spawned moving sprites, this position will later be used in the SpriteBatch.Draw call (page 108): // Randomly choose which side of the screen to place enemy, // then randomly create a position along that side of the screen // and randomly choose a speed for the enemy switch (((Game1)Game).rnd.Next(4)) { case 0: // LEFT to RIGHT position = new Vector2( -frameSize.X, ((Game1)Game).rnd.Next(0, Game.GraphicsDevice.PresentationParameters.BackBufferHeight - frameSize.Y)); speed = new Vector2(((Game1)Game).rnd.Next( enemyMinSpeed, enemyMaxSpeed), 0); break;

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  • Thread safe GUI programming

    - by James
    I have been programming Java with swing for a couple of years now, and always accepted that GUI interactions had to happen on the Event Dispatch Thread. I recently started to use GTK+ for C applications and was unsurprised to find that GUI interactions had to be called on gtk_main. Similarly, I looked at SWT to see in what ways it was different to Swing and to see if it was worth using, and again found the UI thread idea, and I am sure that these 3 are not the only toolkits to use this model. I was wondering if there is a reason for this design i.e. what is the reason for keeping UI modifications isolated to a single thread. I can see why some modifications may cause issues (like modifying a list while it is being drawn), but I do not see why these concerns pass on to the user of the API. Is there a limit imposed by an operating system? Is there a good reason these concerns are not 'hidden' (i.e. some form of synchronization that is invisible to the user)? Is there any (even purely conceptual) way of creating a thread safe graphics library, or is such a thing actually impossible? I found this http://blogs.operationaldynamics.com/andrew/software/gnome-desktop/gtk-thread-awareness which seems to describe GTK differently to how I understood it (although my understanding was the same as many people's) How does this differ to other toolkits? Is it possible to implement this in Swing (as the EDT model does not actually prevent access from other threads, it just often leads to Exceptions)

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  • CodePlex Daily Summary for Monday, September 30, 2013

    CodePlex Daily Summary for Monday, September 30, 2013Popular ReleasesWDTVHubGen - Adds Metadata, thumbnails and subtitles to WDTV Live Hubs: WDTVHubGen.v2.1.5apifix-alpha: WDTVHubGen.v2.1.5apifix-alpha updated to fix the imdb look up problem. working on other problems but wanted this out there for testing.Visual Log Parser: VisualLogParser: Portable Visual Log Parser for Dotnet 4.0Random searcher i pochodne: Generatorek playlisty: Generuje playlisty w formacie .m3u. Na razie beta z bety - ale juz dziala i mozna uzywac.sb0t v.5: sb0t 5.15: Fixed bug in join filter. Fixed bug in pm blocking. Added new Crypto and Entities static classes to scripting. Updated the default node list.Trace Reader for Microsoft Dynamics CRM: Trace Reader (1.2013.9.29): Initial releaseAudioWordsDownloader: AudioWordsDownloader 1.1 build 88: New features -------- list of words (mp3 files) is available upon typing when a download path is defined list of download paths is added paths history settings added Bug fixed ----- case mismatch in word search field fixed path not exist bug fixed when history has been used path, when filled from dialog, not stored refresh autocomplete list after path change word sought is deleted when path is changed at the end sought word list is deleted word list not refreshed download end...HD-Trailers.NET Downloader: HD-Trailer.Net Downloader v 2.1.5: This started out as an effort to improve the search for the corr3ct IMDB page for the movie. I think I have done that here. I have run about 200 movies and the correct movie was identified in all cases including some entries that were problematic in the past. I also swatted several bugs that popped up under special circumstances and resulted in exceptions. This version should be quite a bit better than previous versions. Let me know if there are any issues.Wsus Package Publisher: Release v1.3.1309.28: Fix a bug, where WPP crash when running on a computer where Windows was installed in another language than Fr, En or De, and launching the Update Creation Wizard. Fix a bug, where WPP crash if some Multi-Thread job are launch with more than 64 items. Add a button to abort "Install This Update" wizard. Allow WPP to remember which columns are shown last time. Make URL clickable on the Update Information Tab. Add a new feature, when Double-Clicking on an update, the default action exec...Tweetinvi a friendly Twitter C# API: Alpha 0.8.3.0: Version 0.8.3.0 emphasis on the FIlteredStream and ease how to manage Exceptions that can occur due to the network or any other issue you might encounter. Will be available through nuget the 29/09/2013. FilteredStream Features provided by the Twitter Stream API - Ability to track specific keywords - Ability to track specific users - Ability to track specific locations Additional features - Detect the reasons the tweet has been retrieved from the Filtered API. You have access to both the ma...AcDown?????: AcDown????? v4.5: ??●AcDown??????????、??、??、???????。????,????,?????????????????????????。???????????Acfun、????(Bilibili)、??、??、YouTube、??、???、??????、SF????、????????????。 ●??????AcPlay?????,??????、????????????????。 ● AcDown???????C#??,????.NET Framework 2.0??。?????"Acfun?????"。 ??v4.5 ???? AcPlay????????v3.5 ????????,???????????30% ?? ???????GoodManga.net???? ?? ?????????? ?? ??Acfun?????????? ??Bilibili??????????? ?????????flvcd???????? ??SfAcg????????????? ???????????? ???????????????? ????32...CtrlAltStudio Viewer: CtrlAltStudio Viewer 1.0.0.34288 Release: This release of the CtrlAltStudio Viewer includes the following significant features: Stereoscopic 3D display support. Based on Firestorm viewer 4.4.2 codebase. For more details, see the release notes linked to below. Release notes: http://ctrlaltstudio.com/viewer/release-notes/1-0-0-34288-release Support info: http://ctrlaltstudio.com/viewer/support Privacy policy: http://ctrlaltstudio.com/viewer/privacy Disclaimer: This software is not provided or supported by Linden Lab, the makers of ...C# Intellisense for Notepad++: Release v1.0.6.0: Added support for classless scripts To avoid the DLLs getting locked by OS use MSI file for the installation.SimpleExcelReportMaker: Serm 0.02: SourceCode and SampleMagick.NET: Magick.NET 6.8.7.001: Magick.NET linked with ImageMagick 6.8.7.0. Breaking changes: - ToBitmap method of MagickImage returns a png instead of a bmp. - Changed the value for full transparency from 255(Q8)/65535(Q16) to 0. - MagickColor now uses floats instead of Byte/UInt16.Media Companion: Media Companion MC3.578b: With the feedback received over the renaming of Movie Folders, and files, there has been some refinement done. As well as I would like to introduce Blu-Ray movie folder support, for Pre-Frodo and Frodo onwards versions of XBMC. To start with, Context menu option for renaming movies, now has three sub options: Movie & Folder, Movie only & Folder only. The option Manual Movie Rename needs to be selected from Movie Preferences, but the autoscrape boxes do not need to be selected. Blu Ray Fo...FFXIV Crafting Simulator: Crafting Simulator 2.3: - Major refactoring of the code behind. - Added a current durability and a current CP textbox.DNN CMS Platform: 07.01.02: Major HighlightsAdded the ability to manage the Vanity URL prefix Added the ability to filter members in the member directory by role Fixed issue where the user could inadvertently click the login button multiple times Fixed issues where core classes could not be used in out of process cache provider Fixed issue where profile visibility submenu was not displayed correctly Fixed issue where the member directory was broken when Convert URL to lowercase setting was enabled Fixed issu...Rawr: Rawr 5.4.1: This is the Downloadable WPF version of Rawr!For web-based version see http://elitistjerks.com/rawr.php You can find the version notes at: http://rawr.codeplex.com/wikipage?title=VersionNotes Rawr Addon (NOT UPDATED YET FOR MOP)We now have a Rawr Official Addon for in-game exporting and importing of character data hosted on Curse. The Addon does not perform calculations like Rawr, it simply shows your exported Rawr data in wow tooltips and lets you export your character to Rawr (including ba...Sample MVC4 EF Codefirst Architecture: RazMVCWebApp ver 1.1: Signal R sample is added.CODE Framework: 4.0.30923.0: See change notes in the documentation section for details on what's new. Note: If you download the class reference help file with, you have to right-click the file, pick "Properties", and then unblock the file, as many browsers flag the file as blocked during download (for security reasons) and thus hides all content.New ProjectsBeerStats: Beeeeeeer!CodeSet: ttfishteam: Connecting people by their music interestsGassFlow: This is a Computational Method for Genome Annotation based on Species Similarity.GasTeam: connecting peopleHermess Branch: testhermesbranchHyperPage: HyperPage is a HTML\PHP\CSS programming studio. Written in VB12 features folders, files, intellisense, file searching and color selector.JPEG Auto-rotate: A shell extension that automatically rotates JPEG images based on the orientation stored in their EXIF tag (pictures taken with modern smartphones/cameras).Lu?n van t?t nghi?p K09: Phân tích thái d? c?m xúc ngu?i dùng m?ng xã h?iMixDoS: MixDoS is an application who helps you control your computer and helps you collect all your batch applications! This application is easier to use than X3ME!NeoLua: A Lua implementation for the Dynamic Language Runtime (DLR).SharePoint Helpers: A cross product JavaScript and .NET library to simplify SharePoint (2007, 2010, 2013, Office 365) development and make migration easier.Snake Board Game: Childhood is always a happy time, Classical game will never left out from our Memories here is my first game that i have created when i was studying....spmisframework: SpmisFrameworkTFSTest: Just for testTrace Reader for Microsoft Dynamics CRM: Trace reader for Microsoft Dynamics CRM helps you reading the trace files generated by Microsoft Dynamics CRM (4.0, 2011 and 2013) on a graphical interfaceTuple Edit: Editor/IDE for multiple languages.ultvast: utlimus for vastUser Cloner for Dynamics CRM 2011: User Cloner for Dynamics CRM 2011 User Cloner for Dynamics CRM 2011 is utility for all CRM administrators, consultant who have to deal with user issues on CRM WHKY: testWhoIs.dart: Tool to query Whois servers, implemented in Dart.winchrome: Provides different types of window chrome for NavigationWindowsYLH_CRM_Project: This is used to reconstruct ylh of crm

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  • ASP.NET Session Management

    - by geekrutherford
    Great article (a little old but still relevant) about the inner workings of session management in ASP.NET: Underpinnings of the Session State Management Implementation in ASP.NET.   Using StateServer and the BinaryFormatter serialization occuring caused me quite the headache over the last few days. Curiously, it appears the w3wp.exe process actually consumes more memory when utilizing StateServer and storing somewhat large and complex data types in session.   Users began experiencing Out Of Memory exceptions in the production environment. Looking at the stack trace it related to serialization using the BinaryFormatter. Using remote debugging against our QA server I noted that the code in the application functioned without issue. The exception occured outside the context of the application itself when the request had completed and the web server was trying to serialize session state into the StateServer.   The short term solution is switching back to the InProc method. Thus far this has proven to consume considerably less memory and has caused no issues. Long term the complex object stored in session will be off-loaded into a web service used to access the information directly from the database outside the context of the object used to encapsulate it.

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  • Is QtQuick.Controls available on Ubuntu 13.10

    - by javascript is future
    I was looking to do UI development in QML, and I really want it to look native. I found the QtQuick.Controls (http://qt-project.org/doc/qt-5.1/qtquickcontrols/qtquickcontrols-index.html), but when I try make a simple application, it tells me that QtQuick.Controls isn't installed. main.qml: import QtQuick 2.1 import QtQuick.Controls 1.0 Rectangle { height: 200 width: 200 } terminal: $ qmlscene main.qml file:///tmp/main.qml:2 module "QtQuick.Controls" is not installed Also, I downloaded the source from https://qt.gitorious.org/qt/qtquickcontrols/source/stable, ran qmake && make, but this returned the following output: cd src/ && ( test -e Makefile || /usr/lib/i386-linux-gnu/qt5/bin/qmake /tmp/qtquickcontrols/src/src.pro -o Makefile ) && make -f Makefile make[1]: Går til katalog '/tmp/qtquickcontrols/src' cd controls/ && ( test -e Makefile || /usr/lib/i386-linux-gnu/qt5/bin/qmake /tmp/qtquickcontrols/src/controls/controls.pro -o Makefile ) && make -f Makefile make[2]: Går til katalog '/tmp/qtquickcontrols/src/controls' g++ -c -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -O2 -fvisibility=hidden -fvisibility-inlines-hidden -std=c++0x -fno-exceptions -Wall -W -D_REENTRANT -fPIC -DQT_NO_XKB -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -DQT_PLUGIN -DQT_QUICK_LIB -DQT_QML_LIB -DQT_WIDGETS_LIB -DQT_NETWORK_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I/usr/share/qt5/mkspecs/linux-g++ -I. -I/usr/include/qt5 -I/usr/include/qt5/QtQuick -I/usr/include/qt5/QtQml -I/usr/include/qt5/QtWidgets -I/usr/include/qt5/QtNetwork -I/usr/include/qt5/QtGui -I/usr/include/qt5/QtGui/5.1.1 -I/usr/include/qt5/QtGui/5.1.1/QtGui -I/usr/include/qt5/QtCore -I/usr/include/qt5/QtCore/5.1.1 -I/usr/include/qt5/QtCore/5.1.1/QtCore -I.moc/release-shared -o .obj/release-shared/qquickaction.o qquickaction.cpp qquickaction.cpp:49:39: fatal error: private/qguiapplication_p.h: No such file or directory #include <private/qguiapplication_p.h> ^ Is there some PPA I could use, or do I have to wait for Trusty to get out, before I can use native controls from Qt? Regards

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  • ArchBeat Link-o-Rama Top 10 for November 2, 2012

    - by Bob Rhubart
    ADF Mobile - Login Functionality | Andrejus Baranovskis "The new ADF Mobile approach with native deployment is cool when you want to access phone functionality (camera, email, sms and etc.), also when you want to build mobile applications with advanced UI, " reports Oracle ACE Director Andrejus Baranovskis. Big Data: Running out of Metric System | Andrew McAfee Do very large numbers make your brain hurt? Better stock up on aspirin. According to Andrew McAfee: "It seems safe to say that before the current decade is out we’ll need to convene a 20th conference to come up with some more prefixes for extraordinarily large quantities not to describe intergalactic distances or the amount of energy released by nuclear reactions, but to capture the amount of digital data in the world." Cloud computing will save us from the zombie apocalypse | Cloud Computing - InfoWorld "It's just a matter of time before we migrate our existing IT assets to public cloud systems," says InfoWorld cloud blogger David Linthicum. "Additionally, it's a short window until the dead rise from the grave and attempt to eat our brains." Is is Halloween or something? Thought for the Day "A computer lets you make more mistakes faster than any invention in human history—with the possible exceptions of hand guns and tequila." — Mitch Ratcliffe

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  • Unity throws SynchronizationLockException while debugging

    - by pjohnson
    I've found Unity to be a great resource for writing unit-testable code, and tests targeting it. Sadly, not all those unit tests work perfectly the first time (TDD notwithstanding), and sometimes it's not even immediately apparent why they're failing. So I use Visual Studio's debugger. I then see SynchronizationLockExceptions thrown by Unity calls, when I never did while running the code without debugging. I hit F5 to continue past these distractions, the line that had the exception appears to have completed normally, and I continue on to what I was trying to debug in the first place.In settings where Unity isn't used extensively, this is just one amongst a handful of annoyances in a tool (Visual Studio) that overall makes my work life much, much easier and more enjoyable. But in larger projects, it can be maddening. Finally it bugged me enough where it was worth researching it.Amongst the first and most helpful Google results was, of course, at Stack Overflow. The first couple answers were extensive but seemed a bit more involved than I could pull off at this stage in the product's lifecycle. A bit more digging showed that the Microsoft team knows about this bug but hasn't prioritized it into any released build yet. SO users jaster and alex-g proposed workarounds that relieved my pain--just go to Debug|Exceptions..., find the SynchronizationLockException, and uncheck it. As others warned, this will skip over SynchronizationLockExceptions in your code that you want to catch, but that wasn't a concern for me in this case. Thanks, guys; I've used that dialog before, but it's been so long I'd forgotten about it.Now if I could just do the same for Microsoft.CSharp.RuntimeBinder.RuntimeBinderException... Until then, F5 it is.

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  • JUnit Testing in Multithread Application

    - by e2bady
    This is a problem me and my team faces in almost all of the projects. Testing certain parts of the application with JUnit is not easy and you need to start early and to stick to it, but that's not the question I'm asking. The actual problem is that with n-Threads, locking, possible exceptions within the threads and shared objects the task of testing is not as simple as testing the class, but testing them under endless possible situations within threading. To be more precise, let me tell you about the design of one of our applications: When a user makes a request several threads are started that each analyse a part of the data to complete the analysis, these threads run a certain time depending on the size of the chunk of data (which are endless and of uncertain quality) to analyse, or they may fail if the data was insufficient/lacking quality. After each completed its analysis they call upon a handler which decides after each thread terminates if the collected analysis-data is sufficient to deliver an answer to the request. All of these analysers share certain parts of the applications (some parts because the instances are very big and only a certain number can be loaded into memory and those instances are reusable, some parts because they have a standing connection, where connecting takes time, ex.gr. sql connections) so locking is very common (done with reentrant-locks). While the applications runs very efficient and fast, it's not very easy to test it under real-world conditions. What we do right now is test each class and it's predefined conditions, but there are no automated tests for interlocking and synchronization, which in my opionion is not very good for quality insurances. Given this example how would you handle testing the threading, interlocking and synchronization?

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  • What triggered the popularity of lambda functions in modern mainstream programming languages?

    - by Giorgio
    In the last few years anonymous functions (AKA lambda functions) have become a very popular language construct and almost every major / mainstream programming language has introduced them or is planned to introduce them in an upcoming revision of the standard. Yet, anonymous functions are a very old and very well-known concept in Mathematics and Computer Science (invented by the mathematician Alonzo Church around 1936, and used by the Lisp programming language since 1958, see e.g. here). So why didn't today's mainstream programming languages (many of which originated 15 to 20 years ago) support lambda functions from the very beginning and only introduced them later? And what triggered the massive adoption of anonymous functions in the last few years? Is there some specific event, new requirement or programming technique that started this phenomenon? IMPORTANT NOTE The focus of this question is the introduction of anonymous functions in modern, main-stream (and therefore, maybe with a few exceptions, non functional) languages. Also, note that anonymous functions (blocks) are present in Smalltalk, which is not a functional language, and that normal named functions have been present even in procedural languages like C and Pascal for a long time. Please do not overgeneralize your answers by speaking about "the adoption of the functional paradigm and its benefits", because this is not the topic of the question.

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  • Strategies for managUse of types in Python

    - by dave
    I'm a long time programmer in C# but have been coding in Python for the past year. One of the big hurdles for me was the lack of type definitions for variables and parameters. Whereas I totally get the idea of duck typing, I do find it frustrating that I can't tell the type of a variable just by looking at it. This is an issue when you look at someone else's code where they've used ambiguous names for method parameters (see edit below). In a few cases, I've added asserts to ensure parameters comply with an expected type but this goes against the whole duck typing thing. On some methods, I'll document the expected type of parameters (eg: list of user objects), but even this seems to go against the idea of just using an object and let the runtime deal with exceptions. What strategies do you use to avoid typing problems in Python? Edit: Example of the parameter naming issues: If our code base we have a task object (ORM object) and a task_obj object (higher level object that embeds a task). Needless to say, many methods accept a parameter named 'task'. The method might expect a task or a task_obj or some other construct such as a dictionary of task properties - it is not clear. It is them up to be to look at how that parameter is used in order to work out what the method expects.

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  • Purchase Vouchers From A Reputable Source

    - by Harold Green
    We have seen a recent increase in counterfeit vouchers being marketed online and we want to make sure our Candidates are aware of the risks of purchasing vouchers from unauthorized sellers. Please be advised that only Oracle University and Oracle University authorized resellers may sell vouchers for Oracle Certification exams. If you purchase a voucher from any other source, your voucher may not be valid and you run the risk of program sanctions from Oracle which could include a lifetime ban on taking Oracle Certification exams. Be sure your voucher is from an authorized source: Oracle University Oracle Authorized Reseller If you are unsure whether your voucher seller is an Authorized Reseller: Call Oracle University to confirm. Check for the official Oracle Reseller logo on the website. Ebay, Craigslist, etc are not authorized resale avenues. The only exceptions to the above sources are vouchers from programs that provide a discount on exams, or vouchers from your employer who has purchased them through their partner program or with learning credits. These vouchers may not purchased by you, but may be provided to you from: Oracle Academy Oracle Workforce Development Partner Your employer who has purchased vouchers directly from Oracle  This investment is too important to trust to chance. Be sure that you are purchasing your voucher from a reputable source so that you can free your mind to prepare for your exam. View the full Oracle Certification Exam Voucher Use Policy.

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  • Should I expect my team to have more than a basic proficiency with our source control system?

    - by Joshua Smith
    My company switched from Subversion to Git about three months ago. We had weeks of advance notice prior to the switch. Since I'd never used Git before (or any other DVCS), I read Pro Git and spent a little time spinning up my own repositories and playing around, so that when we switched I'd be able to keep working with minimal pain. Now I'm the 'Git guy' by default. With a couple of exceptions, most of my team still has no idea how Git works. For example, they still think of branches as complete copies of the source code, and even go so far as to clone the repo into multiple folders (one per branch). They generally look at Git as a scary black box. Given the fundamental nature of source control in our daily work (not to mention the ridiculous amount of power Git affords us), I'm of the opinion that any dev who doesn't achieve a certain level of proficiency with it is a liability. Should I expect my team to have at least some understanding of how Git works internally, and how to use it beyond the most basic pull/merge/push operations? Or am I just making something out of nothing?

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  • How do I get Graphics drivers / bluetooth / card reader working on an Acer Aspire V3-571G?

    - by Adam
    A couple of days ago I bought an Acer Aspire V3-571G laptop without a system installed on it. The only thing that was there was Linux Linpus. I created a bootable CD with Ubuntu 12.04 64-bit - I read that my processor was 64 bit and that it might be a good configuration for my gear (I'm not especially fluent with all the computer stuff, still trying to learn) and replaced Linpus with Ubuntu. Everything seemed to work fine, but there're few exceptions to that which came pass my way. My bluetooth doesn't work. It seems to be switched on, but when I check my system settings the button is actually off, and I can't drag it 'perminently' to the 'on' position. Tried a couple of commands I found on the net, none of them helped and there was no word whatsoever in my BIOS settings about enabling bluetooth. My card reader has some serious problems with copying more than one file at a time. I tried to put some music on my phone through a MicroSD card adapter (because my bluetooth doesn't work) and it got stuck every single time I copied an album on it. I'm not sure if all my drivers were properly installed, so I checked in the terminal if it could tell me sth about my graphics. typed: sudo lshw -c display and what i got was: *-display UNCLAIMED description: VGA compatible controller product: NVIDIA Corporation vendor: NVIDIA Corporation physical id: 0 bus info: pci@0000:01:00.0 version: a1 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress vga_controller cap_list configuration: latency=0 resources: memory:b2000000-b2ffffff memory:a0000000-afffffff memory:b0000000-b1ffffff ioport:2000(size=128) *-display description: VGA compatible controller product: Ivy Bridge Graphics Controller vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 09 width: 64 bits clock: 33MHz capabilities: msi pm vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:44 memory:b3000000-b33fffff memory:c0000000-cfffffff ioport:3000(size=64) As I said I'm no expert and not english-speaking generally, but it doesn't seem to be right. I've got a NVIDIA GeForce GT 640M.

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  • Is a disk/ata timeout exception dangerous?

    - by j-g-faustus
    I have a few hard drives in mdadm RAID 5 configured to go to standby after a few minutes of inactivity. (Using hdparm.conf spindown_time.) At irregular intervals I get messages like these in dmesg: [ 1840.251661] ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen [ 1840.251722] ata4.00: failed command: SMART [ 1840.251758] ata4.00: cmd b0/d5:01:06:4f:c2/00:00:00:00:00/00 tag 0 pio 512 in [ 1840.251759] res 40/00:14:50:2e:04/00:00:02:00:00/40 Emask 0x4 (timeout) [ 1840.251858] ata4.00: status: { DRDY } [ 1840.251888] ata4: hard resetting link [ 1840.600742] ata4: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [ 1840.601521] ata4.00: configured for UDMA/133 [ 1840.601547] ata4: EH complete [337877.713988] ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen [337877.714019] ata4.00: failed command: SMART [337877.714038] ata4.00: cmd b0/d5:01:06:4f:c2/00:00:00:00:00/00 tag 0 pio 512 in [337877.714039] res 40/00:04:90:10:81/00:00:00:00:00/40 Emask 0x4 (timeout) [337877.714089] ata4.00: status: { DRDY } [337877.714107] ata4: hard resetting link [337878.063085] ata4: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [337878.063743] ata4.00: configured for UDMA/133 [337878.063764] ata4: EH complete I think the exception is caused by smartd when a drive does not wake up quickly enough. There are no issues (that I can tell) in accessing the drives normally through the file system - it takes a few seconds longer than normal when they are asleep, but there are no exceptions. Is this something I should worry about, as a potential symptom on something that could corrupt a drive over time? Or can I safely ignore it as part of normal operation? Edit: By request: smartctl -a for sdaand sde, both disks are members of the array. If ata4is the same as scsi-4 then sde is the one that gave the error above, according to /dev/disk/by-path.

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  • Technical Integration Roadmap for OBI11g and Oracle Hyperion EPM System

    - by Mike.Hallett(at)Oracle-BI&EPM
    There is an excellent technical whitepaper on the integration roadmap for Oracle business intelligence enterprise edition and the Oracle Hyperion enterprise performance management system  (download at this link).  This document lists the integration points among all current releases of Oracle BI EE with EPM System releases: with live links to other relevant documentation also provided. You may also be interested in the overall Hyperion EPM System Documentation Resources which can be found from the Doc Portal. And, there are two new tools for EPM @ MyOracleSupport  {this needs your oracle logon} : Cumulative Feature Overview Tool This new tool offers a simple way to determine the features developed between releases to assist you in your upgrade implementations. The tool helps you to plan your upgrades by providing concise descriptions of new and enhanced solutions and functionality that are added between your current and target releases. With the Cumulative Feature Overview Tool, you can quickly and easily find information about new features for each EPM System product. Defects Fixed Finder Tool This new tool provides an efficient way to review the defects fixed in patch set updates, patch set exceptions, and patch sets for major releases, starting with Release 11.1.1. The tool helps you plan patch implementations by providing concise descriptions of defects fixed after your current release. The Defects Fixed Finder enables you to easily find information about defects fixed for each EPM System product.

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  • What is Stackify?

    - by Matt Watson
    You have developers, applications, and servers. Stackify makes sure that they are all working efficiently. Our mission is to give developers the integrated tools they need to better troubleshoot and monitor the applications they create and the servers that they run on. Traditional IT operations tools are designed for network and system administrators. Developers commonly spend 30% of their time working with IT Operations remediating application service problems. Developers currently lack tools to efficiently support the applications they create. Stackify delivers the application support functionality that developers need:View application deployment locations, versions, and historyBrowse files on servers to ensure proper deploymentsAccess configuration and log files on serversRemotely restart windows services, scheduled tasks, and web applicationsBasic server monitoring and alertsCollects all application exceptions to a centralized pointLog and report on custom applications eventsStackify is building an integrated DevOps solution delivered from the cloud designed to meet the needs of developers but also help unify the working relationship with IT operations teams and existing security roles. Our goal is to help unify the interaction between developers and IT operations. Stackify allows both teams to have visibility that they never had before  to solve complex application service issues easier and faster. Stackify’s CEO and CTO both have experience managing very large and high growth software development teams. That experience is driving our design in Stackify to deliver the integrated tools we always wished we had, the next generation of development operations tools.

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  • Does immutability entirely eliminate the need for locks in multi-processor programming?

    - by GlenPeterson
    Part 1 Clearly Immutability minimizes the need for locks in multi-processor programming, but does it eliminate that need, or are there instances where immutability alone is not enough? It seems to me that you can only defer processing and encapsulate state so long before most programs have to actually DO something. If a program performs actions on multiple processors, something needs to collect and aggregate the results. All this involves multi-process communication before, after, and possibly during some transformations. The start and end state of the machines are different. Can this always be done with no locks just by throwing out each object and creating a new one instead of changing the original (a crude view of immutability)? What cases still require locking? I'm interested in both the theoretical/academic answer and the practical/real-world answer. I know a lot of functional programmers like to talk about "no side effect" but in the "real world" everything has a side effect. Every processor click takes time and electricity and machine resources away from other processes. So I understand that there may be more than one perspective to answer this question from. If immutability is safe, given certain bounds or assumptions, I want to know what the borders of the "safety zone" are exactly. Some examples of possible boundaries: I/O Exceptions/errors Interfaces with programs written in other languages Interfaces with other machines (physical, virtual, or theoretical) Special thanks to @JimmaHoffa for his comment which started this question! Part 2 Multi-processor programming is often used as an optimization technique - to make some code run faster. When is it faster to use locks vs. immutable objects? Given the limits set out in Amdahl's Law, when can you achieve better over-all performance (with or without the garbage collector taken into account) with immutable objects vs. locking mutable ones? Summary I'm combining these two questions into one to try to get at where the bounding box is for Immutability as a solution to threading problems.

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  • Designing business objects, and gui actions

    - by fozz
    Developing a product ordering system using Java SE 6. The previous implementations used combo boxes, text fields, and check boxes. Preforming validation on action events from the GUI. The validation includes limiting existing combo boxes items, or even availability. The issue in the old system was that the action was received and all rules were applied to the entire business object. This resulted in a huge event change as options were changed multiple times. To be honest I have no idea how an infinite loop wasn't produced. Through the next iteration I stepped in and attempted to limit the chaos by controlling the order in which the selections could be made. Making configuration of BO's a top down approach. I implemented custom box models, action events, beans/binding, and an MVC pattern. However I still am unable to fully isolate action even chains. I'm thinking that I've approached the whole concept backwards in an attempt to stay closest to what was already in place. So the question becomes what do I design instead? I'm currently considering an implementation of Interfaces, Beans, Property Change Listeners to manage the back and forth. Other thoughts were validation exceptions, dynamic proxies.... I'm sure there are a ton of different ways. To say that one way is right is crazy, and I'm sure it will take a blending of multiple patterns. My knowledge of swing/awt validation is limited, previously I did backend logic only. Other considerations are were some sort of binding(jgoodies or otherwise) to directly bind GUI state to BO's.

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  • Suggestions for a Live chat software on websites for customer support?

    - by Munish Goyal
    Recommendations needed. We want to get in touch with customers via live chat. Requirements: chat window customisable to mingle with website theme (colors etc) preferably the window should be within webpage and not only pop-out/popup. ease of use by customer minimally intrusive should have triggers/Alerts to backend side. for ex: user is unable to fill-up signup form or something, we should be able to offer help to user and this chat window automatically shows to user. What is the cost ? UPDATE: After R&D we also narrowed down to comm100 and liveperson, and we will go with comm100. LP is best commerical soln. but comm100 is a good free soln. We go with comm100 as starting point. But it gives out exceptions alerts sometimes in the dashboard. Can it be configured for chat invitations triggered on certain conditions. Currently only a timebased trigger is available. Any other major difference between these two ?

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  • No Thank You &ndash; Yours Truly &ndash; F#

    - by MarkPearl
    I am plodding along with my F# book. I have reached the part where I know enough about the syntax of the language to understand something if I read it – but not enough about the language to be productive and write something useful. A bit of a frustrating place to be. Needless to say when you are in this state of mind – you end up paging mindlessly through chapters of my F# book with no real incentive to learn anything until you hit “Exceptions”. Raising an exception explicitly So lets look at raising an exception explicitly – in C# we would throw the exception, F# is a lot more polite instead of throwing the exception it raises it, … (raise (System.InvalidOperationException("no thank you"))) quite simple… Catching an Exception So I would expect to be able to catch an exception as well – lets look at some C# code first… try { Console.WriteLine("Raise Exception"); throw new InvalidOperationException("no thank you"); } catch { Console.WriteLine("Catch Exception and Carry on.."); } Console.WriteLine("Carry on..."); Console.ReadLine();   The F# equivalent would go as follows… open System; try Console.WriteLine("Raise Exception") raise (System.InvalidOperationException("no thank you")) with | _ -> Console.WriteLine("Catch Exception and Carry on..") Console.WriteLine("Carry on...") Console.ReadLine();   In F# there is a “try, with” and a “try finally” Finally… In F# there is a finally block however the “with” and “finally” can’t be combined. open System; try Console.WriteLine("Raise Exception") raise (System.InvalidOperationException("no thank you")) finally Console.WriteLine("Finally carry on...") Console.ReadLine()

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  • Ubuntu One has high CPU usage but no syncing

    - by Peter
    over the weekend I updated my computer to Windows 8. So far Ubuntu One was running smoothly, but ever since the update (clean, new install) Ubuntu doesn't sync any more. In Windows 7 it would start to sync at full internet speed as soon as I drop a file. But now in Windows 8, as soon as I drop a new file into the Ubuntu One folder, CPU usage goes up to about 50 % and no network traffic occurs. This stays like that for a couple of minutes, CPU usage goes back to normal and then the client says that all is in sync - which isn't true. Is it too early for Windows 8? Do others have the same problem or is there something I can do about it? I try a couple of different things, and realized that if the file size is 20 MB the files get uploaded. The original file was 1.5 GB. I also didn't work with 200, 100 and 50 MB large files. But even with 20 MB large files, the upload is very slow and not steady. The log give plenty of this error: - twisted - ERROR - Failure: exceptions.TypeError About which I don't know the meaning. By the way, the account works just fine on the Ubuntu 12.04 partition. Any help is greatly appreciated. -Peter

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