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• How to deal with OOP design problems in interviews?

  - by haps10

  This is a question where I seek guidance from fellow/senior developers to get into my dream company - it's a pioneer in OOP and Agile. I've already failed once to clear an interview. One part I feel most challenging is to come up with a proper Object Oriented design(classes, interfaces, methods, interactions etc.) in a very short time for certain situations like Pacman, Game Of Life and so on. As the problems are unprecedented ones - my approach is mostly to try different things and then make decisions - which they feel is not clear and not what they expect from a developer with 5+ years of experience. I've already studied a few books on patterns, OOP - it didn't help me much and I think it'll take a bit more than that. Could some one please guide on what specifically shall I practice so that I can do better at design problems as above. I want to refine my approach and have a better thought process.

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• SOLVED: Breaking parent web.config dependencies in sub applications

  This article explains how to implement a sub application such as a blog in your website without experiencing dependency issues. A common problem that developers experience is when their sub applications accidentally inherit requirements of the parent website. This is actually by design but read on if this is causing problems in your site. Scenario This problem has caught me out a couple of times so far but usually with enough of a gap between occurrences that it had become just a fuzzy memory....Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• My Future as a Developer

  - by jmquigley

  You have been a developer for 16 years, mostly in the unix environment woring with C, C++ and Java. You are proficient in those skills, but can always improve. The jobs for C and C++ developers working in the Unix environment are not as plentiful as they used to be, so you're looking to expand your skills. If you were going to focus on an area of technology for the next 10 years, and you had a choice of C# or to continue with your work in Java and expand those skills, which would you choose and why? I love being a programmer. I want to focus on an area that would put me in demand so that I can continue to be a programmer. This is not meant to be subjective, I'm looking for guidance and advice from other professionals. This is a question that is at the front of my mind right now. TIA.

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• How to make Classic ASP interesting if you are stuck with it?

  - by reno812

  I used to work on a really small outsourcing company (4 programmers and the boss), then when the stress and the frequent long shifts made the situation unbearable I made the switch to a better paid job with a more relaxed schedule that allows me some more free time. The problem, however, is that for the most part, everything is coded in Classic ASP that interfaces with a custom made C++ queueing system that stores everything in AS400 systems. My boss used to be one of the developers that made the initial efforts towards this, and naturally won't ever approve a switch to another languages / technologies despite the increasing difficulty that represents developing today business needs with yesterday tools. I'm pretty much stuck coding with Classic ASP in the foreseeable future, and I'm struggling to find ways to make it at least interesting, as I used to work with .NET and Java previously, and I feel like I'm going backwards... Any advice?

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• Monitor screen size and programming ease

  - by rrazd

  I recently heard that a big part in successful/quick debugging and easing the process of programming is to use a big screen. I may be purchasing a new computer in the future and this has me wondering: 1)Is the aforementioned statement actually true or is it a bit of a stretch? 2)Have you noticed that this plays a significant enough part to buy a bigger screen if the bigger screen is significantly more expensive? 3)Is it common for developers to work on 13'' laptop screen as their main (and only) workstation (this is what I currently develop on) or is this actually disadvantageous? This may be subjective but any professional opinions/experiences would be greatly appreciated!

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• What should a system architect know? [closed]

  - by marko

  What does the title System Architect really mean? What do you need to know to be a system architect. Do you need to know design patterns or something like that? At work we have a couple so called "System Architects". They do the same stuff as we developers, but the distinction are that they are older and thus has more experience and knowledge of the business domain we work in. But I'm not really seeing the architecting side of work really...

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• Encouraging business and team members to write more code

  - by Aliixx

  I am really interested to hear any ideas or working practices that can be adopted to encourage our team of developers to write more code. A little background here is involves a team of varying disciplines, experience and qualities and the nature of the work has a large focus on bug fixes and business logic / data validation over writing lots of new greenfield code or even refactoring. We are attempting to move to a more Agile philosophy and really what would be great is to hear any ideas that can be sold to the team and / or the business with the aim of: Writing more new code to improve experience, abilities and increase exposure to newer and emerging patterns and practices. Energizing the effort of the team and inspire. Encouraging wider input of new ideas, patterns and practices from the team as a whole. I would be very interested (and grateful) to hear any ideas or examples of ideas that can help here. Thanks!

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• Are the results of the system-check taken by "checkbox-gtk" public? Where can I watch them?

  - by oZiRiz

  With Ubuntu there comes a nice possibility to check the compatibility of a new (or even old) system and to send these data to the ubuntu developers. The tool to do this is "checkbox-gtk". I would like to know, whether there is a chance to view these results because it would be nice to know if the future system will work with ubuntu. Yes. I know about the certified hardware list, but there are only a few systems listed and i hope that more people test there systems with checkbox and commit the results.

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• Does anyone write games in Delphi?

  - by MDV2000

  I am a very seasoned Delphi developer (over 12 years of experience not counting my Turbo Pascal experience) and was wondering does anyone write games in Delphi? I have seen DirectX API wrappers in Delphi that allow you to program against DirectX (even wrote a simple solitaire game with a friend), but haven't seen anything out there that shows me that I should keep up with Delphi. I just hate to walk away from so much knowledge and Object Pascal language, but I am not seeing much as to a reason to keep going with Delphi. I currently program in C# and thinking about XNA, but it seems to me that the dominating opinion is go C/C++ route with DirectX. Any other Delphi developers out there struggle with this too? Thanks, MDV

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• Plagued by multithreaded bugs

  - by koncurrency

  On my new team that I manage, the majority of our code is platform, TCP socket, and http networking code. All C++. Most of it originated from other developers that have left the team. The current developers on the team are very smart, but mostly junior in terms of experience. Our biggest problem: multi-threaded concurrency bugs. Most of our class libraries are written to be asynchronous by use of some thread pool classes. Methods on the class libraries often enqueue long running taks onto the thread pool from one thread and then the callback methods of that class get invoked on a different thread. As a result, we have a lot of edge case bugs involving incorrect threading assumptions. This results in subtle bugs that go beyond just having critical sections and locks to guard against concurrency issues. What makes these problems even harder is that the attempts to fix are often incorrect. Some mistakes I've observed the team attempting (or within the legacy code itself) includes something like the following: Common mistake #1 - Fixing concurrency issue by just put a lock around the shared data, but forgetting about what happens when methods don't get called in an expected order. Here's a very simple example: void Foo::OnHttpRequestComplete(statuscode status) { m_pBar->DoSomethingImportant(status); } void Foo::Shutdown() { m_pBar->Cleanup(); delete m_pBar; m_pBar=nullptr; } So now we have a bug in which Shutdown could get called while OnHttpNetworkRequestComplete is occuring on. A tester finds the bug, captures the crash dump, and assigns the bug to a developer. He in turn fixes the bug like this. void Foo::OnHttpRequestComplete(statuscode status) { AutoLock lock(m_cs); m_pBar->DoSomethingImportant(status); } void Foo::Shutdown() { AutoLock lock(m_cs); m_pBar->Cleanup(); delete m_pBar; m_pBar=nullptr; } The above fix looks good until you realize there's an even more subtle edge case. What happens if Shutdown gets called before OnHttpRequestComplete gets called back? The real world examples my team has are even more complex, and the edge cases are even harder to spot during the code review process. Common Mistake #2 - fixing deadlock issues by blindly exiting the lock, wait for the other thread to finish, then re-enter the lock - but without handling the case that the object just got updated by the other thread! Common Mistake #3 - Even though the objects are reference counted, the shutdown sequence "releases" it's pointer. But forgets to wait for the thread that is still running to release it's instance. As such, components are shutdown cleanly, then spurious or late callbacks are invoked on an object in an state not expecting any more calls. There are other edge cases, but the bottom line is this: Multithreaded programming is just plain hard, even for smart people. As I catch these mistakes, I spend time discussing the errors with each developer on developing a more appropriate fix. But I suspect they are often confused on how to solve each issue because of the enormous amount of legacy code that the "right" fix will involve touching. We're going to be shipping soon, and I'm sure the patches we're applying will hold for the upcoming release. Afterwards, we're going to have some time to improve the code base and refactor where needed. We won't have time to just re-write everything. And the majority of the code isn't all that bad. But I'm looking to refactor code such that threading issues can be avoided altogether. One approach I am considering is this. For each significant platform feature, have a dedicated single thread where all events and network callbacks get marshalled onto. Similar to COM apartment threading in Windows with use of a message loop. Long blocking operations could still get dispatched to a work pool thread, but the completion callback is invoked on on the component's thread. Components could possibly even share the same thread. Then all the class libraries running inside the thread can be written under the assumption of a single threaded world. Before I go down that path, I am also very interested if there are other standard techniques or design patterns for dealing with multithreaded issues. And I have to emphasize - something beyond a book that describes the basics of mutexes and semaphores. What do you think? I am also interested in any other approaches to take towards a refactoring process. Including any of the following: Literature or papers on design patterns around threads. Something beyond an introduction to mutexes and semaphores. We don't need massive parallelism either, just ways to design an object model so as to handle asynchronous events from other threads correctly. Ways to diagram the threading of various components, so that it will be easy to study and evolve solutions for. (That is, a UML equivalent for discussing threads across objects and classes) Educating your development team on the issues with multithreaded code. What would you do?

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• Is this a reliable method of parsing glGetShaderInfoLog()?

  - by m4ttbush

  I want to get a list of errors and their line numbers so I can display the error information differently from how it's formatted in the error string and also to show the line in the output. It looks easy enough to just parse the result of glGetShaderInfoLog(), look for ERROR:, then read the next number up to :, and then the next, and finally the error description up to the next newline. However, the OpenGL docs say: Application developers should not expect different OpenGL implementations to produce identical information logs. This makes me worry that my code may behave incorrectly on different systems. I don't need them to be identical, I just need them to follow the same format. So is there a better way to get a list of errors with the line number separate, is it safe to assume that they'll always follow the "ERROR: 0:123:" format, or is there simply no reliable way to do this?

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• Silverlight 4 minor update&ndash;June 2010

  Today we released a service update for Silverlight 4. This is a minor release that addresses some items found immediately after release that have now completed our test passes with those who reported them. Most of the items found wont affect all users, but media developers will want to get this update for their applications and encourage their users to upgrade. This update (4.0.50524.0) addresses a few media-related items found by some of our media customers. A few items were serviced for DRM users...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Music Players in Ubuntu/Linux [closed]

  - by v2r

  Music Player, just like Web Browsers are an important part of today's application repertoire, and not only for entertainment reason. Having tried a few Linux Player over the past years i come to wonder, which Players you prefer and what kind of Players are out there, that you suggest are worth looking into and why!! I used Rhythmbox for a long time, but "Jamendo and Magnatune" plugin are both no longer available in 11.10 and also my covers are not shown, since i stream my music folder from a second partition. aTunes is another great Player, but there are also some flaws which i contacted the developers about. It would be nice if you post some alternatives! --Thank you. Example: Name of Player: aTunes | Homepage Additional Info : aTunes is a java-based Music-Player for Linux/Unix/Windows and ... Only one player-example per answer, please!!

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• Are there any free embedable REPL interpreters for a website? [migrated]

  - by Google

  I am hoping to find a free REPL interpreter for a number of languages. I am starting a new web page to help developers learn with a number of tutorials. I want to embed an interpreter on the site so users can have a tutorial and interpreter side by side. I really like free interpreters such as the one at repl.it. However, I am unable to find a free/embeddable interpreter. I was hoping to avoid making one myself-- they seem tricky to make safely! Thanks!

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• Free course on Java Embedded on the Raspberry Pi?

  - by A Tael

  Oracle is developing a free, on-line course on developing Oracle Java Embedded applications using a Raspberry Pi as the development platform. The course teaches experienced Java SE developers how to design and develop applications using Java ME Embedded 8 EA on a Raspberry Pi with physical devices, including: switches and Light Emitting Diodes (LED); temperature/barometric pressure sensors; Global Positioning System (GPS) sensors; and system interrupt timers. Additional modules include logging, threads, network I/O, file I/O, record management service, push registry, application management services and best practices for headless embedded devices.Sounds like great fun doesn't it? Read more about the course and give us your feedback in this short survey. <<Andy>>

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• skype crashes, also audio problems 13.10

  - by user139710

  Ive always had problems with skype ususally with audio, trying to keep the usb headphones set correctly. Wha tive found is that when i see the Pulseaudio server in the audio list in Skype, and thats my only option, Skype works good,...stable and reliable. Second issue: Its been crashing a bit, just locks up and the only thing to free it up is a reboot,.. These problems are under the new release 13.10. so concider this a bug report. DEVELOPERS: You all need to make a good channel for people to report bugs,.... OK thats all/

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• NetBeans 7.1 Release Candidate (RC) 1 is here

  - by alexismp

  NetBeans 7.1 RC 1 is here. Grab it from the usual place! As previously discussed, NetBeans 7.1 has full JavaFX 2.0 support but also a lot in store for Java EE and Web developers (CDI in particular is very neat). One of my personal favorite feature is that Deploy on Save is now set by default on Maven projects. Maybe one important part that didn't get proper coverage so far is CSS 3 support, an important feature which can be used from both Java EE and PHP but also from JavaFX. Java Downloads of NetBeans 7.1 start at 69 MB and a 166 MB download will get you everything you need to start coding right away with Java EE - a great tool and a fully integrated runtime (GlassFish 3.1.1). You really need to be not using Maven, not be interested in recent standards (Java EE 6, Java SE 7, Java FX 2.0, ...) and like to hand-craft assemble your IDE to afford ignoring NetBeans nowadays.

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• Producing JSON Documents from SQL Server queries via TSQL

  Although SQL Server supports XML well, XML's little cousin JSON gets no love. This is frustrating now that JSON is in so much demand. Maybe, Phil Factor suggests, it is possible to leverage all that XML, and XPath, goodness in SQL Server to produce JSON in a versatile way from SQL Queries? Yes, it so happens that there are plenty of alternatives. FREE eBook – "45 Database Performance Tips for Developers"Improve your database performance with 45 tips from SQL Server MVPs and industry experts. Get the eBook here.

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• why my unit testing taken more than normal time to run in VS 2010 Premium [on hold]

  - by kombo

  I have only 4 proeject in my solutions. Am trying to run a unit test for one of my class in one of the project. I Create the unit test by: Right clicking on the class choose the create unit test option. I followed the wizard to the end.which resulting the test creation. I just pass the values of the parameter and run the test. but my test keep running. Both surprisingly it runs on other developers pc. NB:My class is connecting to the database and my application is asp.net web form. i know this is not recommended but i want to have my test running now. i have tried alot of samples on the internet but still my problem persist. Could any one tell me the cause of the extreme slowness(more than 30 minutes)

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• What IDE(s) or editor(s) do companies like Google, Apple, IBM, etc. use?

  - by Pius

  Even though I have quite some experience in using various tools, I still can't make up my mind whether I prefer using IDE or a simple editor for code editing. Most IDEs I have experienced are written in Java (like Eclipse) which makes them slow and bulky. What's good about them is that it provides lots of tools. On the other hand editors are usually VERY fast. They can also be extended to become more similar to IDEs but usually I don't do that. However, there is Sublime Text 2 which has some basic code completion built-in. My question would be whether most Enterprise companies like Google, Apple, IBM and etc (except Microsoft because they have AMAZING IDE which, I assume, is used by MS developers) force their workers to use IDEs and whether using plain editor with external tools is considered being not professional? P.S. Not talking about cases like Android development where working without IDE barely possible.

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• Android–Supporting Multiple Devices Part 2

  - by rodelljr

  Originally posted on: http://geekswithblogs.net/rodelljr/archive/2014/06/03/androidsupporting-multiple-devices-part-2.aspxI would like to thank the KC Mobile App Developers group for allowing me to do my presentation; Supporting Multiple Devices Part 2. In this talk, I discussed a Master/Detail application that runs on Android 2.2 devices and forward. I used the Actionbar compat Android library to allow the older devices to have an actionbar. I also used a SQLite database for my data. And just to add one last thing, I also incorporated the use of custom fonts. If you are interesting in looking at this sample application, I have uploaded it to my GitHub account here. I also have a Power Point presentation which you can get here.I will be doing this talk again at a later date this year, so when I have a date and location, I will post a follow up blog.

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• Putting the Con (COM1, LPT1, NUL, etc.) Back in your URLs

  One annoyance that some developers have run into with ASP.NET MVC is that certain reserved filenames are not allowed in URLs. The specifics of this restriction are accounted for in an interesting blog post entitled Zombie Operating Systems and ASP.NET MVC. This actually wasnt a restriction on ASP.NET MVC but was built into the core of ASP.NET itself. Fortunately, ASP.NET 4 fixes this issue with a new setting. In web.config, simply add <httpRuntime relaxedUrlToFileSystemMapping="true"/> to...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• How many hours do you spend programming outside of work if you are married (with children) [closed]

  - by eterps

  I recently attended a conference and met some insanely talented developers with mile-long lists of accomplishments. One puzzling thing I noticed about many of these wildly successful people is that a lot of their output (books, blogs, games, mobile apps) are done as hobby projects outside of their normal jobs. Not only this, but most of them were married, and some even with children. I'm absolutely baffled by this. My question is targeted to folks that are married, working full time, and also spend time outside of work on hobby projects or extra programming. The question is: How many hours do you put in programming outside of your normal job, and how do you balance it with your family life?

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• ?????? ?? ???

  크롬캐스트와 구글 캐스트 작년에 미국에서 출시한 크롬캐스트는 N 스크린과 스마트 TV 시장에 새로운 화두를 던지고 있으며 타임지가 뽑은 2013년도의 제품을 선정되기도... From: Google Developers Views: 6 0 ratings Time: 15:55 More in Science & Technology

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• ?????? ?? ??? 2

  크롬캐스트와 구글 캐스트 2 작년에 미국에서 출시한 크롬캐스트는 N 스크린과 스마트 TV 시장에 새로운 화두를 던지고 있으며 타임지가 뽑은 2013년도의 제품을 선정되기도... From: Google Developers Views: 25 4 ratings Time: 20:05 More in Science & Technology

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