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• How to configure KDE default settings for a new user of a group?

  - by Adobe

  I'm a sys admin on Kubuntu 11.10 machine. Where do I configure the basic config for a new user (say belonging to group "users")? Edit 1: I want to configure langauages - currently my new users get English and Bulgarian Languages. I want them to get English and Russian - and also to set Alt-CapsLock - to be the input-language-switching-combination. Edit 2: How do I configure things in /usr/share/kde4 When I do kdesudo systemsettings and save configurations - only root settings got changed - not the /usr/share/kde4 ones. Edit 3: New user gets the /etc/skel files controlling bash behaviour-appearence. What about the KDE new user's default files - where are they stored? Edit 4: Oh, I found some hints: kde4-config --path config gives a list of folders (separated by the colon) where KDE looks for configs. My machine responded with: /home/boris/.kde/share/config/ /etc/kde4/ /usr/share/kubuntu-default-settings/kde4-profile/default/share/config/ /usr/share/kde4/config/ /usr/share/desktop-base/profiles/kde-profile/share/config/ It looks like third line is where KDE takes the default options. So I found these zilions of settings - but no GUI way to configure it ((. Edit 5: Finally, I've created a dummy user, configured it, and wrote a script which gives it's settings to a given user(s). The trick - is to chown after one transfered the dot files from one user to another. I've tested it - it works fine.

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• Assignments in mock return values

  - by zerkms

  (I will show examples using php and phpunit but this may be applied to any programming language) The case: let's say we have a method A::foo that delegates some work to class M and returns the value as-is. Which of these solutions would you choose: $mock = $this->getMock('M'); $mock->expects($this->once()) ->method('bar') ->will($this->returnValue('baz')); $obj = new A($mock); $this->assertEquals('baz', $obj->foo()); or $mock = $this->getMock('M'); $mock->expects($this->once()) ->method('bar') ->will($this->returnValue($result = 'baz')); $obj = new A($mock); $this->assertEquals($result, $obj->foo()); or $result = 'baz'; $mock = $this->getMock('M'); $mock->expects($this->once()) ->method('bar') ->will($this->returnValue($result)); $obj = new A($mock); $this->assertEquals($result, $obj->foo()); Personally I always follow the 2nd solution, but just 10 minutes ago I had a conversation with couple of developers who said that it is "too tricky" and chose 3rd or 1st. So what would you usually do? And do you have any conventions to follow in such cases?

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• How can I learn more about ADF?

  - by jhpierce -Oracle

  Look to the Oracle Technology Network for a wealth of information, tutorials, best practices and coding examples. The place to start is the Oracle Application Development Framework (ADF) web page. The Oracle ADF page has basic information and downloads for ADF, but the real wealth is in the links to other pages. One of the pages is the Oracle ADF Code Corner,  which is a blog-style column that provides hints, tips and coding examples for ADF developers. The content on this page ranges from easy to complex and often contains advanced programming concepts. The content is inspired by questions asked on the Oracle JDeveloper customer forum on OTN. The ADF Code Corner has many articles that will inspire your imagination and possibly solve your coding problem.How about the Oracle ADF Architecture Square link? The Oracle ADF Architecture Square focuses on architectural issues and developer guidelines for writing ADF software solutions. The goal is to give ADF developers an understanding of the necessary decisions for building a successful ADF application, to offer potential architectural blueprints to choose from when putting the ADF application together, and to provide potential ADF best practices to take back to your development team. The Oracle ADF Mobile link gives information on developing mobile applications for iOS and Android based applications. There are links to ADF Mobile Overview, ADF Mobile demos and ADF Mobile courses.The Sample ADF Applications link lists sample applications and other resources where you can find code samples for ADF. These are complete ADF applications that can be downloaded into JDeveloper and give you insight into coding an application.There are many more links found under the "Learn More" tab that can equip the developer with the knowledge they need to develop their applications. There are links to overview papers, technical resources, related topics and available training. The information you need IS just a click away.

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• Best way to update UI when dealing with data synchronization

  - by developerdoug

  I'm working on a bug at work. The app is written in Objective-C for iOS based device, for the iPad. I'm the new guy there and I've been given a hard task. Sometimes, the UIButton text property does not show the correct state when syncing. Basically, when the app is syncing, my UI control would say "Syncing" and when its not syncing it'll display "Updated @ [specific date]". Right now there is a property on the app delegate called "SyncInProgress". When querying / syncing, occurring on background thread, it updates a counter. The property will return a bool checking expression 'counter 0'. There are three states I need to deal with. Sync has started. Sync is updating tables. Sync finished. These items need to occur in order. My coworker suggested to take a state based approach instead of just responding to events. I'm not sure about how to go about that. Would it be best to have the UI receive a notification to determine what state its in or to pull every so often if state changed? Here are two posts that I put on stackoverflow, in the last few days, that relate to this. http://stackoverflow.com/questions/11025469/ios-syncing-using-a-state-approach-instead-of-just-reacting-to-events http://stackoverflow.com/questions/11037930/viewcontroller-when-viewwillappear-called-does-not-always-correctly-reflect-stat Any ideas that anyone might have to very much appreciated. Thanks, developerDoug

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• Code Clone Analysis on Rawr &ndash; Part 1

  - by Dylan Smith

  In this post we’ll take a look at the first result from the Code Clone Analysis, and do some refactoring to eliminate the duplication.  The first result indicated that it found an exact match repeated 14 times across the solution, with 18 lines of duplicated code in each of the 14 blocks.   Net Lines Of Code Deleted: 179     In this case the code in question was a bunch of classes representing the various Bosses.  Every Boss class has a constructor that initializes a whole bunch of properties of that boss, however, for most bosses a lot of these are simply set to 0’s.     Every Boss class inherits from the class MultiDiffBoss, so I simply moved all the initialization of the various properties to the base class constructor, and left it up to the Boss subclasses to only set those that are different than the default values. In this case there are actually 22 Boss subclasses, however, due to some inconsistencies in the code structure Code Clone only identified 14 of them as identical blocks.  Since I was in there refactoring the 14 identified already, it was pretty straightforward to identify the other 8 subclasses that had the same duplicated behavior and refactor those also.   Note: Code Clone Analysis is pretty slow right now.  It takes approx 1 min to build this solution, but it takes 9 mins to run Code Clone Analysis.  Personally, if the results are high quality I’m OK with it taking a long time to run since I don’t expect it’s something I would be running all that often.  However, it would be nice to be able to run it as part of a nightly build, but at this time I don’t believe it’s possible to run outside of Visual Studio due to a dependency on the meta-data available in the VS environment.

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• Assuming "clean code/architecture" is there a difference in "effort" between PHP or Java/J2EE web application development?

  - by PhD

  A client asked us to estimate effort when selecting PHP as the implementation language for his next web-based application. We spent about a week exploring PHP, prototyping, testing etc., We are quite new to this language - may have hacked around it in the past but, let's go with PHP-noobs but application development experts (for the lack of a better, less flattering word :) It seems, that if we write, clean maintainable code, follow separation of concerns, enterprise architecture patters (DAOs etc.) the 'effort' in creating an object-oriented PHP based web-application seems to be the same for a Java based one. Here's our equation for estimating the effort (development/delivery time): ConstructionEffort = f(analysis, design, coding, testing, review, deployment) We were specifically comparing effort estimates in creating an enterprise application with the following: PHP + CakePHP/CodeIgniter (should we have considered others?) Java + Spring + Restlet It's an end-to-end application: Client: Javascript/jQuery + HTML/CSS Middle tier/Business Logic - (Still evaluating PHP/Java) Database: MySQL The effort estimates of the 1st and 3rd tier are constant and relatively independent of the middle tier's technology. At a high level with an initial breakdown into user stories of the requested features as well as a high-level SWAG on the sheer number of classes/SLOC that would be required for PHP doesn't seem to differ by much from what is required of the same in Java. Is this correct? We are basing our initial estimates on the initial prototyping/coding we've done with PHP - we are currently disregarding fluency with the language as a factor, since that'll be an initial hurdle and not a long term impediment IMHO (we also have sufficient time to become quite fluent with PHP). I'm interested in knowing the programmers' perspective with respect to effort when creating similar applications with either of the languages to justify choosing one over the other. Are we missing something here? It seems we are going against popular belief of PHP being quicker to market (or we being very fluent with Java have our vision clouded). It doesn't seem to have any coding/programming effort saving from what we/ve played around with.

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• How can I include my derived class type name in the serialized JSON?

  - by ChrisD

  Sometimes working with the js Serializer is easy, sometimes its not.   When I attempt to serialize an object that is derived from a base, the serializer decided whether or not to include the type name. When its present, the type name is represented by a ___type attribute in the serialized json like this: {"d":{"__type":"Commerce.Integration.Surfaces.OrderCreationRequest","RepId":0}} The missing type name is a problem if I intend to ship the object back into a web method that needs to deserialize the object.   Without the Type name, serialization will fail and result in a ugly web exception. The solution, which feels more like a work-around, is to explicitly tell the serializer to ALWAYS generate the type name for each derived type.  You make this declaration by adding a [GenerateScriptType())] attribute for each derived type to the top of the web page declaration.   For example, assuming I had 3 derivations of OrderCreationRequest; PersonalOrderCreationRequest, CompanyOrderCreationRequest, InternalOrderCreationRequestion, the code-behind for my web page would be decorated as follows: [GenerateScriptType(typeof(PersonalOrderCreationRequest))] [GenerateScriptType(typeof(CompanyOrderCreationRequest))] [GenerateScriptType(typeof(InternalOrderCreationRequest))] public partial class OrderMethods : Page { ... } With the type names generated in the serialized JSON, the serializer can successfully deserialize instances of any of these types passed into a web method. Hope this helps you as much as it did me.

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• Why is CS never a topic of conversation of the layman? [closed]

  - by hydroparadise

  Granted, every profession has it's technicalities. If you are an MD, you better know the anatomy of the human body, and if you are astronomer, you better know your calculus. Yet, you don't have to know these more advance topics to know that smoking might give you lung cancer because of carcinogens or the moon revolves around the earth because of gravity (thank you Discovery Channel). There's sort of a common knowledge (at least in more developed countries) of these more advanced topics. With that said, why are things like recursive descent parsing, BNF, or Turing machines hardly ever mentioned outsided 3000 or 4000 level classes in a university setting or between colleagues? Even back in my days before college in my pursuit of knowledge on how computers work, these very important topics (IMHO) never seem to get the light of day. Many different sources and sites go into "What is a processor?" or "What is RAM?", or "What is an OS?". You might get lucky and discover something about programming languages and how they play a role in how applications are created, but nothing about the tools for creating the language itself. To extend this idea, Dennis Ritchie died shortly after Steve Jobs, yet Dennis Ritchie got very little press compared to Steve Jobs. So, the heart of my question: Does the public in general not care to hear about computer science topics that make the technology in their lives work, or does the computer science community not lend itself to the general public to close the knowledge gap? Am I wrong to think the general public has the same thirst for knowledge on how things work as I do? Please consider the question carefully before answering or vote closing please.

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• Is error suppression acceptable in role of logic mechanism?

  - by Rarst

  This came up in code review at work in context of PHP and @ operator. However I want to try keep this in more generic form, since few question about it I found on SO got bogged down in technical specifics. Accessing array field, which is not set, results in error message and is commonly handled by following logic (pseudo code): if field value is set output field value Code in question was doing it like: start ignoring errors output field value stop ignoring errors The reasoning for latter was that it's more compact and readable code in this specific case. I feel that those benefits do not justify misuse (IMO) of language mechanics. Is such code is being "clever" in a bad way? Is discarding possible error (for any reason) acceptable practice over explicitly handling it (even if that leads to more extensive and/or intensive code)? Is it acceptable for programming operators to cross boundaries of intended use (like in this case using error handling for controlling output)? Edit I wanted to keep it more generic, but specific code being discussed was like this: if ( isset($array['field']) ) { echo '<li>' . $array['field'] . '</li>'; } vs the following example: echo '<li>' . @$array['field'] . '</li>';

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• Android - big game universe

  - by user1641923

  I am new to an Android development, though I have much experience with Java, C++, PHP programming and a bit experience with vector graphics too (basic 3d Studio Max, Flash, etc). I am starting to work on an Android game. It is going to be a 2D space shooter/RPG, and I am not going to use any game engines and any 3D party libs. I really want to create a very large game universe, or even pseudo-infinite (without visible borders, as if it were a 2D projection of a sphere). It should include 10-12 clusters of 7-8 planets/other space objects and random amount of single asteroids/comets, which player can interact with and also not interactive background. I am looking for a least complicated aproach to create such a universe. My current ideas are: Simply create bitmaps with space scenery background so that they can be tiled seamlessly repeated and construct my 2D universe of this tiles, then place interactive objects (planets, other spaceships) on it. Using vector graphics. I would have a solid color background, some random background objects and gradients here and there. My problems here: Lack of knowledge of how well vector graphics is integrated in Android. Performance? Memory usage? Does Android manage big bitmaps well? Do all of the bitmaps have to be in memory during all game process? I am interested in technical details regarding each of the ideas and a suggestion, which I should go with.

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• World Location issues with camera and particle

  - by Joe Weeks

  I have a bit of a strange question, I am adapting the existing code base including the tile engine as per the book: XNA 4.0 Game Development by example by Kurt Jaegers, particularly the aspect that I am working on is the part about the 2D platformer in the last couple of chapters. I am creating a platformer which has a scrolling screen (similar to an old school screen chase), I originally did not have any problems with this aspect as it is simply a case of updating the camera position on the X axis with game time, however I have since added a particle system to allow the players to fire weapons. This particle shot is updated via the world position, I have translated everything correctly in terms of the world position when the collisions are checked. The crux of the problem is that the collisions only work once the screen is static, whilst the camera is moving to follow the player, the collisions are offset and are hitting blocks that are no longer there. My collision for particles is as follows (There are two vertical and horizontal): protected override Vector2 horizontalCollisionTest(Vector2 moveAmount) { if (moveAmount.X == 0) return moveAmount; Rectangle afterMoveRect = CollisionRectangle; afterMoveRect.Offset((int)moveAmount.X, 0); Vector2 corner1, corner2; // new particle world alignment code. afterMoveRect = Camera.ScreenToWorld(afterMoveRect); // end. if (moveAmount.X < 0) { corner1 = new Vector2(afterMoveRect.Left, afterMoveRect.Top + 1); corner2 = new Vector2(afterMoveRect.Left, afterMoveRect.Bottom - 1); } else { corner1 = new Vector2(afterMoveRect.Right, afterMoveRect.Top + 1); corner2 = new Vector2(afterMoveRect.Right, afterMoveRect.Bottom - 1); } Vector2 mapCell1 = TileMap.GetCellByPixel(corner1); Vector2 mapCell2 = TileMap.GetCellByPixel(corner2); if (!TileMap.CellIsPassable(mapCell1) || !TileMap.CellIsPassable(mapCell2)) { moveAmount.X = 0; velocity.X = 0; } return moveAmount; } And the camera is pretty much the same as the one in the book... with this added (as an early test). public static void Update(GameTime gameTime) { position.X += 1; }

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• Which frontend framework/library should I learn to enhance an existing site? [on hold]

  - by Codemonkey

  I have a large site that I've coded by hand over the last couple of years. It's a sports results service, and allows users to view their results, compare themselves to others, buy photographs, that sort of thing. The code base is fairly substantial, and scarily uses no frameworks or libraries. It's a PHP backend, and a clean & compact frontend. I use the Highcharts library, but other than that all of the JS is my own. I'm not a fan of bulk, even if it is CDN-hosted and heavily cachable. Maybe I need to change my outlook on this? I'm wanting to make some significant changes to the site now, and it seems an appropriate time to enhance my skillset by learning AngularJS, or something else of that ilk. A large part of the site is tables of data, and as just one example of the sort of thing I want to achieve, I'd like to let users add/remove/sort columns better than they currently can. Are any of the various frameworks/libraries out there more suitable to shoehorning into an existing project?

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• ubuntu nic card issue

  - by Blainer

  I am trying to install NIC r8168 and it shows everything installed ok. It is a brand new NIC and the lights wont come on when I plug in a ethernet. The NIC is that is not working is eth0. Why does it show the r8168 driver being used by 0? My NIC model number is ST1000SPEX if anyone is wondering. lsmod Module Size Used by r8168 215669 0 ifconfig eth0 Link encap:Ethernet HWaddr 00:0a:cd:1e:0a:4a UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) Interrupt:43 Base address:0x2000 eth1 Link encap:Ethernet HWaddr 00:19:d1:1d:f6:7a inet addr:192.168.1.83 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::219:d1ff:fe1d:f67a/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:551467 errors:0 dropped:0 overruns:0 frame:0 TX packets:145219 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:409744342 (409.7 MB) TX bytes:12233173 (12.2 MB) Interrupt:21 Memory:dfde0000-dfe00000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:280 errors:0 dropped:0 overruns:0 frame:0 TX packets:280 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:22608 (22.6 KB) TX bytes:22608 (22.6 KB) Ubuntu 11.10 x64 Kernel 3.0.0-12-generic

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• Beginners guide to developing optimization software

  - by Florenc

  I am novice in "serious" programming i.e. applications that deal with real-life applications and software projects that go beyond school assignments. My interests include optimization, operations research, algorithms and lately i discovered how much I do like software design/development/engineering. I have already developed some simple desktop applications for some "famous" problems like TSP using heuristc approaches, a VRP solver (in progress) and so on. While developing this kind of software I actually used basic concepts taught at school such as object-orientation analysis and design. But, I found these courses rather elementary and quite boring (for my expectations). So I decided to go a little further and start developing "real" software (and this is where I realized how important and interesting software engineering/design is.) Now, here's my issue: I can not find a "study guide" for developing software of this kind. Currently, there are numerous resources out there (books, websites, tutorials) in designing and developing complex IS, web applications, smartphone apps but I can't find a book for example entitled "optimization software development". Definetly, someone could claim that "design patterns apply to software in general" but that's not my point. My point is that I could simply use my imagination for "simple" implementations, but what happens, when my imagination can not go further? In other words I'm looking for a guide/path to bridge the gap between: Mathematics-Algorithm Design-Software Engineering-Optimization-Software development

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• Should I use a config file or database for storing business rules?

  - by foiseworth

  I have recently been reading The Pragmatic Programmer which states that: Details mess up our pristine code—especially if they change frequently. Every time we have to go in and change the code to accommodate some change in business logic, or in the law, or in management's personal tastes of the day, we run the risk of breaking the system—of introducing a new bug. Hunt, Andrew; Thomas, David (1999-10-20). The Pragmatic Programmer: From Journeyman to Master (Kindle Locations 2651-2653). Pearson Education (USA). Kindle Edition. I am currently programming a web app that has some models that have properties that can only be from a set of values, e.g. (not actual example as the web app data confidential): light-type = sphere / cube / cylinder The light type can only be the above three values but according to TPP I should always code as if they could change and place their values in a config file. As there are several incidents of this throughout the app, my question is: Should I store possibly values like these in: a config file: 'light-types' = array(sphere, cube, cylinder), 'other-type' = value, 'etc = etc-value a single table in a database with one line for each config item a database with a table for each config item (e.g. table: light_types; columns: id, name) some other way? Many thanks for any assistance / expertise offered.

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• The Talent Behind Customer Experience

  - by Christina McKeon

  Earlier, I wrote about Powerful Data Lessons from the Presidential Election. A key component of the Obama team’s data analysis deserves its own discussion—the people. Recruiters are probably scrambling to find out who those Obama data crunchers are and lure them into corporations. For the Obama team, these data scientists became a secret ingredient that the competition didn’t have. This team of analysts knew how to hear the signal and ignore the noise, how to segment and target its base, and how to model scenarios and revise plans based on what the data told them. The talent was the difference. As you work to transform your organization to be more customer-centric, don’t forget that talent is a critical element. Journey mapping is a good start to understanding how your talent impacts your customer experiences. Part of journey mapping includes documenting the “on-stage” and “back-stage” systems and touchpoints. When mapping this part of your customers’ journey, include the roles and talent behind the employee actions—both customer facing and further upstream from that customer touchpoint. Know what each of these roles does, how well you are retaining people in these areas, and your plans to fill these open positions in the future. To use data scientists as an example, this job will be in high demand over the next 10 years. The workforce is shrinking, and higher education institutions may not be able to turn out trained data scientists as fast as you need them. You don’t want to be caught with a skills deficit, so consider how you can best plan for the future talent you will need. Have your existing employees make their career aspirations known to you now. You may find you already have employees willing to take on roles that drive better customer experiences. Then develop customer experience talent from within your organization through targeted learning programs. If you know that you will need to go outside the organization, build those candidate relationships now. Nurture the candidates you want to hire and partner with universities, colleges, and trade associations so you can increase the number of qualified candidates in your talent pool.

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• Is version history really sacred or is it better to rebase?

  - by dukeofgaming

  I've always agreed with Mercurial's mantra, however, now that Mercurial comes bundled with the rebase extension and it is a popular practice in git, I'm wondering if it could really be regarded as a "bad practice", or at least bad enough to avoid using. In any case, I'm aware of rebasing being dangerous after pushing. OTOH, I see the point of trying to package 5 commits in a single one to make it look niftier (specially at in a production branch), however, personally I think would be better to be able to see partial commits to a feature where some experimentation is done, even if it is not as nifty, but seeing something like "Tried to do it way X but it is not as optimal as Y after all, doing it Z taking Y as base" would IMHO have good value to those studying the codebase and follow the developers train of thought. My very opinionated (as in dumb, visceral, biased) point of view is that programmers like rebase to hide mistakes... and I don't think this is good for the project at all. So my question is: have you really found valuable to have such "organic commits" (i.e. untampered history) in practice?, or conversely, do you prefer to run into nifty well-packed commits and disregard the programmers' experimentation process?; whichever one you chose, why does that work for you? (having other team members to keep history, or alternatively, rebasing it).

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• Self-imposed lockout from program

  - by Alex

  I'm plagued with a lack of willpower. I recently started looking for solutions, and came across a program for macs called SelfControl which completely blocks one's access to a given set of websites for a given period of time (you can delete the program/restart your computer/do almost anything and it will still block those sites for the specified time period, and doesn't require a password to do it.) Unfortunately, there are no windows analogues. The one that comes the closest is Cold Turkey. It has the functionality whereby you set a time in the future, specify a list of websites (or programs - eg explorer, firefox, chrome) and you are blocked from accessing them for the whole duration. No password can undo it, no system reboot, etc. The problem is that the program is a buggy piece of garbage, and in order to ensure that you're not locked out from websites forever, you have to run an uninstaller which is just an exe file accessible at any time which completely defeats the purpose of a self-imposed program lockout. I want to make a better version of that program, or find a simple way to prevent access to a given set of programs over a given period of time with no way around it. I've only taken a few introductory courses in java (math major), but the internet is really having a negative effect on my studies, and the only way I can do work is to eliminate all distractions. What do I need to learn in order to make a program with the following properties: Given a set of .exe files, and a time in the future , this program will prevent access to the given .exe files until current time = given time restarting the computer doesn't interfere with the program, one can't uninstall the program until current time = given time, one can't create another instance of the program to block itself I don't care how much programming knowledge i need to acquire in order to make this program, so please give me a specific list of things that I need to study in order to make this happen, or if something like this exists, then please let me know.

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• So now Google has said no to old browsers when can the rest of us follow suit?

  - by Richard

  Google recently announced that they will no longer support older browsers on Aug 1st: http://www.bbc.co.uk/news/technology-13639875 http://gmailblog.blogspot.com/2011/06/our-plans-to-support-modern-browsers.html For this reason, soon Google Apps will only support modern browsers. Beginning August 1st, we’ll support the current and prior major release of Chrome, Firefox, Internet Explorer and Safari on a rolling basis. Each time a new version is released, we’ll begin supporting the update and stop supporting the third-oldest version. There is nothing worse than looking at the patching of code that takes place to support older browsers. If we could all move towards a standards only web (I'm looking at you IE9) then surely we could spend more time programming good web apps and less trying to make them run equally on terrible non standards compliant older browsers. So when can the rest of us expect to be able to tell our clients that we no longer support older browsers? Because it seems that large corporates will continue to run older browsers and even if google chrome frame can be installed without admin privileges (it's coming soon, currently in beta) we can't expect all users to be motivated to do this. I appreciate any thoughts.

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• Designing a system with different business rules for different customers

  - by user1595846

  My company is rewriting our proprietary business application. The current architecture is poorly done and inflexible. It is coded more procedural oriented as opposed to object oriented. It has become difficult to maintain. Our system is a web application written in .Net Webforms. I am considering ASP.Net MVC for the rewrite. We intend to rewrite it with a good, solid architecture with the goal of maintainability and reusable classes for some of our other systems and services. We would also like the system to be customizable for different customers in the event that we market the system. I am considering redesigning the system based on the layered architecture (Presentation, Business, Data Access layers) described in the Microsoft Patterns and Practices Application Architecture Guide. http://msdn.microsoft.com/en-us/library/ff650706.aspx Hopefully this isn't too open ended, but how would you recommend allowing for different business logic/rules for different customers? I'm aware of Windows Workflow Foundation, but from what I've read about it, it seems many business rules could be too complicated to handle there. Also, Can anyone point me to where I can download an example of a .net solution that is based on the Application Architecture Guide? I have already downloaded the Layered Architecture Solution Guidance and the Expense Sample on codeplex. I was looking for something a bit larger and more robust that I could step through the code and see how it works. If you feel there are better architectures to base our redesign on please feel free to share. I appreciate your help!

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• What does SVN do better than git?

  - by doug

  No question that the majority of debates over programmer tools distill to either personal choice (by the user) or design emphasis, i.e., optimizing design according to particular uses cases (by the tool builder). Text Editors are probably the most prominent example--a coder who works on a Windows at work and codes in Haskell on the Mac at home, values cross-platform and compiler integration and so chooses Emacs over Textmate, etc. It's less common that a newly introduced technology is genuinely, demonstrably superior to the extant options. I wonder if this is in fact the case with version-control systems, in particular, centralized VCS (CVS, SVN) versus distributed VCS (git, hg)? I used SVN for about five years, and SVN is currently used where I work. A little less than three years ago, I switched to git (and gitHub) for all of my personal projects. I can think of a number of advantages of git over subversion (and which for the most part abstract to advantages of distributed over centralized VCS), but I cannot think of one contra example--some task (that's relevant and arises in a programmers usual workflow) that subversion does better than git. The only conclusion I have drawn from this is that I don't have any data--not that git is better, etc. My guess is that such counter-examples exist, hence this question.

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• Distributing my Application inside a Debian Virtual Machine Image-- How to meet GPL obligations?

  - by bdk

  I have a Linux application I've developed, and I have created a standalone VMWare Image that people can download to try out the application without needing to install and configure a Linux Server. I created this VMWare Image by starting with a base Debian system, installing a bunch of packages and then configuring all the packages and daemons my application depends on. Upon load, the VMWare Image boots right into an X Server running only my application and no Window manager, so its more of a "Virtual Appliance" than a normal Linux Desktop environment. Users generally will never see a command prompt or any application other than my own. (My application itself I have a handle on the licensing issues of) Now I would like to distribute this image, but I'm not sure how to meet my GPL (and other licenses the various Debian components are released under) Obligations. As I understand it, I have two primary obligations to meet. Providing Copyright and License Information for each component I use. As I understand it, all the information I am required to present is located in the /usr/share directory in the Debian, but since my users generally will never touch a console or terminal, they will never see this. Does providing a text file containing a concatenation of all the files inside /usr/share meet this obligation Making source code available for all components I distribute. Since I am not creating the image from source, but from binary packages, I can't provide the actual source code that results in exactly my image being generated. Does providing an ftp mirror and an offer to send that mirror on DVDs of the Debian source debs for all the packages I use meet this obligation? Anything Else I'm required to do to legally distribute this image?

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• C#.NET: How to update multiple .NET pages when a particular event occurs in one .Net page? In another words how to use Observer pattern(Publish and subscribe to events)

  Problem: Suppose you have a scenario in which you have to update multiple pages when an event occurs in main page. For example imagine you have a main page where you are dispalying a tab control. This tab control has 3 tab pages where you are loading 3 different user controls. On click of an update button in main page imagine if you have do something in all the 3 tab panels. In other words an event in main page has to be handled in many other pages. An event in main page which contains the tab control has to be handled in all the tab panels(user controls) Answer: Use Observer pattern Define a base page for the page that contains the tab control. Main page which contains the tab: Baseline_Baseline Basepage for the above main page: BaselineBasePage User control that has to be udpated for an event in main page: Baseline_PriorNonDeloitte Source Code: public class BaselineBasePage : System.Web.UI.Page { IList lstControls = new List(); public void Add(IObserver userControl) { lstControls.Add(userControl); } public void Remove(IObserver userControl) { lstControls.Remove(userControl); } public void RemoveAllUserControls() { lstControls.Clear(); } public void Update(SaveEventArgs e) { foreach (IObserver LobjControl in lstControls) { LobjControl.Save(e); } } } public interface IObserver { void Update(SaveEventArgs e); } public partial class Baseline_Baseline : BaselineBasePage { . . . this.Add(_ucPI); this.Add(_ucPI1); protected void abActionBar_saveClicked(object sender, EventArgs e) { SaveEventArgs se = new SaveEventArgs(); se.TabType = (BaselineTabType)tcBaseline.ActiveTabIndex; this.Update(se); } } Public class Baseline_PriorNonDeloitte : System.Web.UI.UserControl,IObserver { public void Update(SaveEventArgs e) { } } More info at: http://www.dofactory.com/Patterns/PatternObserver.aspx span.fullpost {display:none;}

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• Relationship between SOA and OOA

  - by TheSilverBullet

  Thomas Erl defines SOA as follows in his site: Service-oriented computing represents a new generation distributed computing platform. As such, it encompasses many things, including its own design paradigm and design principles, design pattern catalogs, pattern languages, a distinct architectural model, and related concepts, technologies, and frameworks. This definitely sounds like a whole new category which is parallel to object orientation. Almost one in which you would expect an entirely new language to exist for. Like procedural C and object oriented C#. Here is my understanding: In real life, we don't have entirely new language for SOA. And most application which have SOA architecture have an object oriented design underneath it. SOA is a "strategy" to make the entire application/service distributed and reliable. SOA needs OOPS working underneath it. Is this correct? Where does SOA (if at all it does) fit in with object oriented programming practices? Edit: I have learnt through answers that OOA and SOA work with each other and cannot be compared (in a "which is better" way). I have changed the title to "Relationship between SOA and OOA" rather than "comparison".

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• Basic Mouse Features in Silverlight

  - by Sayre Collado

  Hi Guys, I have basic sample on how to use some features of mouse events in Silverlight. The picture. The Mouse Activity Log is to record the all activity done on the projects. My simple snippets on how to add on the textbox is:         protected void MessageLog(string msg)         {             txtMouseLog.Text += msg;         }   For the Mouse Wheel sample this is the snippets:         private void chkMouseWheel_Checked(object sender, RoutedEventArgs e)         {             image1.MouseWheel += new MouseWheelEventHandler(image1_MouseWheel);         }           void image1_MouseWheel(object sender, MouseWheelEventArgs e)         {             ImgScale.ScaleX = e.Delta > 0 ? ImgScale.ScaleX * 1.5 : ImgScale.ScaleX * 0.8;             ImgScale.ScaleY = e.Delta > 0 ? ImgScale.ScaleY * 1.5 : ImgScale.ScaleY * 0.8;               e.Handled = true;         }    And the XAML:        <Image Height="139" Name="image1" Stretch="Fill" Width="178" Source="/GBLOgs1;component/Images/Sunset.jpg">            <Image.RenderTransform>                 <ScaleTransform x:Name="ImgScale"></ScaleTransform>            </Image.RenderTransform>        </Image     I have also the showing of mouse position:           private void Mouse_MouseMove(object sender, MouseEventArgs e)         {             Point point = e.GetPosition(this);             lblMouseLocation.Content = "X: " + point.X + "and Y: " + point.Y;         }           private void checkBox1_Checked(object sender, RoutedEventArgs e)         {             lblMouseLocation.Visibility = Visibility.Visible;             MessageLog("Mouse Location Visible\n");         }           private void checkBox1_Unchecked(object sender, RoutedEventArgs e)         {             lblMouseLocation.Visibility = Visibility.Collapsed;             MessageLog("Mouse Location Collapsed\n");            And even the counting of clicked event:           int clicked = 0;         private void LayoutRoot_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)         {             Point point = e.GetPosition(this);             clicked++;               string msg = "Mouse Clicked " + clicked.ToString() + " time(s) " +                                     "Mouse Location X and Y: " + point.X + " " + point.Y + "\n";               MessageLog(msg);         }     And now the result of above snippets. Happy Programming.

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