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• Who is Configuration Manager?

  - by altern

  I would like to ask members of the community about the role of Configuration Manager, as you see it. I'm not asking what Configuration Management is, as long it had been asked before. What I need to know is: What tasks do you think Configuration Manager should perform (or performs) in your team? What is primary responsibility of Configuration Manager? What are secondary/auxiliary responsibilities of Configuration Manager? Does Configuration Manager need to be in charge of development processes on the project/company or he should be told what to do? What are relations between Configuration Manager, Build Manager, Release Manager, Deployment Engineer, CI Engineer roles? Aren't they all the same - Configuration Management? Maybe term Configuration Management is redundant and Technical/Team Lead should do all the related work instead? It would be really great if you could share your vision and experience.

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• Oral Tradition Check: Two Hundred Meanings for "NULL" in SQL

  - by Thomas L Holaday

  Two decades ago, the topic of "NULL" came up in conversation with a scholarly colleague. As I remember it, he said that C.J.Date, in an essay critical of commercial implementations of SQL, had listed over two hundred meanings for NULL. To my regret, I did not persist the details; but finding that list has since been on my Bucket List. Has anyone else heard this legend? Was it perhaps not Date, but another critic of commercial implementations of SQL?

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• How do you educate your teammates without seeming condescending or superior?

  - by Dan Tao

  I work with three other guys; I'll call them Adam, Brian, and Chris. Adam and Brian are bright guys. Give them a problem; they will figure out a way to solve it. When it comes to OOP, though, they know very little about it and aren't particularly interested in learning. Pure procedural code is their MO. Chris, on the other hand, is an OOP guy all the way -- and a cocky, condescending one at that. He is constantly criticizing the work Adam and Brian do and talking to me as if I must share his disdain for the two of them. When I say that Adam and Brian aren't interested in learning about OOP, I suspect Chris is the primary reason. This hasn't bothered me too much for the most part, but there have been times when, looking at some code Adam or Brian wrote, it has pained me to think about how a problem could have been solved so simply using inheritance or some other OOP concept instead of the unmaintainable mess of 1,000 lines of code that ended up being written instead. And now that the company is starting a rather ambitious new project, with Adam assigned to the task of getting the core functionality in place, I fear the result. Really, I just want to help these guys out. But I know that if I come across as just another holier-than-thou developer like Chris, it's going to be massively counterproductive. I've considered: Team code reviews -- everybody reviews everybody's code. This way no one person is really in a position to look down on anyone else; besides, I know I could learn plenty from the other members on the team as well. But this would be time-consuming, and with such a small team, I have trouble picturing it gaining much traction as a team practice. Periodic e-mails to the team -- this would entail me sending out an e-mail every now and then discussing some concept that, based on my observation, at least one team member would benefit from learning about. The downside to this approach is I do think it could easily make me come across as a self-appointed expert. Keeping a blog -- I already do this, actually; but so far my blog has been more about esoteric little programming tidbits than straightforward practical advice. And anyway, I suspect it would get old pretty fast if I were constantly telling my coworkers, "Hey guys, remember to check out my new blog post!" This question doesn't need to be specifically about OOP or any particular programming paradigm or technology. I just want to know: how have you found success in teaching new concepts to your coworkers without seeming like a condescending know-it-all? It's pretty clear to me there isn't going to be a sure-fire answer, but any helpful advice (including methods that have worked as well as those that have proved ineffective or even backfired) would be greatly appreciated. UPDATE: I am not the Team Lead on this team. Chris is. UPDATE 2: Made community wiki to accord with the general sentiment of the community (fancy that).

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• What are the boundaries between the responsibilities of a web designer and a web developer?

  - by Beofett

  I have been hired to do functional development for several web site redesigns. The company I work for has a relatively low technical level, and the previous development of the web sites were completed by a graphic designer who is self taught as far as web development is concerned. My responsibilities have extended beyond basic development, as I have been also tasked with creating the development environment, and migrating hosting from external CMS hosting to internal servers incorporating scripting languages (I opted for PHP/MySQL). I am working with the graphic designer, and he is responsible for the creative design of the web. We are running into a bit of friction over confusion between the boundaries of our respective tasks. For example, we had some differences of opinion on navigation. I was primarily concerned with ease-of-use (the majority of our userbase are not particularly web-savvy), as well as meeting W3 WAI standards (many of our users are older, and we have a higher than average proportion of users with visual impairment). His sole concern was what looked best for the website, and I felt that the direction he was pushing for caused some functional problems. I feel color choices, images, fonts, etc. are clearly his responsibility, and my expectation was that he would simply provide me with the CSS pages and style classes and IDs to use, but some elements of page layout also seem to fall more under the realm of "usability", which to me translates as near-synonymous with "functionality". I've been tasked with selecting the tools we'll use, which include frameworks, scripting languages, database design, and some open source applications (Moodle for example, and quite probably Drupal in the future). While these tools are quite customizable, working directly with some of the interfaces is beyond his familiarity with CSS, HTML, and PHP. This limits how much direct control he has over the appearance, which has lead to some discussion about the tool choices. Is there a generally accepted dividing line between the roles of a web designer and a web developer? Does his relatively inexperienced background in web technologies influence that dividing line?

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• When is the best time to do self learning in relation with software management?

  - by shankbond

  It all started from here. I have been following Software Estimation: Demystifying the Black Art (Best Practices (Microsoft)). The third chapter says that in Software Management: You cannot give too much time to software developers, if you give it to them, then it is likely that extra time given to them will be filled by some other tasks (in other words, the developers will eat that time :)) Parkinson's Law You can also not squeeze the time from their schedule because if you do that, it is likely that they will develop poor quality product, poor design and will hurt you in the long run, there will be a panic situation and total chaos in the project, lots of rework etc. My question is related to the first point. If you don't give enough time then will the typical software engineer learn his/her skills? The market is always coming with new technologies, you need to learn them. Even with the existing familiar technologies there are always best practices and dos and don'ts.

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• Catering for client's web-hosting needs, minus the headaches ?

  - by julien

  I'll be trying to sell my Ruby on Rails development skills to small local businesses. It seems I'd be shooting myself in the foot if I couldn't manage to put their apps into production, in fact catering for this would be a selling point. However, I do not want to bill every client monthly for the cost of their hosting, they would have to be the contract holders with the hosting service, and I'd only consult if they needed technical help when scaling. I've looked on one hand at cloud platforms, like engine yard, which seem like they would be too costly for the smaller clients, and on the other hand at vps providers which seem they would not be client friendly enough. Has anyone faced the same issue and come up with a decent solution ?

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• What kind of specific projects can I do to master bitwise operations in C++? Also is there a canonical book? [closed]

  - by Ford

  I don't use C++ or bitwise operations at my current job but I'm thinking of applying to companies where it is a requirement to be fluent with them (on their tests anyway). So my question is: Can anyone suggest a project which will require gaining a fluency in bitwise operations to complete? On a side note, is there a canonical book on optimization techniques using bitwise operations since that seems to be an important use of them?

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• Java or Python for internet application?

  - by jpartogi

  In choosing a technology for internet applications where the number of users may scale over time, which one should we consider: Java or Python? What are the considerations in choosing one and not the other? If speed and scalability is our main criteria, which one should we use? We have looked around and it seems that there are more websites that use Python [i.e : Quora, digg, reddit, bitbucket and disqus] than Java. Based on that, can we say that Python is more suitable for internet applications where speed and scalability is the main criteria? However we have browsed around and found some comments saying that Java is actually faster than Python. Thank you for your insights.

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• Best way to convert existing project to be open source in GitHub

  - by Tom

  I've been working on a personal closed source project for some time and would like to make it open source. I've never created my own open source project before so it will be a good learning experience. I have been using GitHub as source control, so once I've written some decent docs on how to use and develop for it etc, it should be as simple as switching the repo to be public right? I guess my main question is around licencing. I was thinking of going with Apache 2.0 licence just because it seems to be widely used. It requires the licence header to be attached to all the source files, but if I do that now then all the other commits in the past will have it missing. Does that mean some one could pull an earlier version and it wouldn't have a licence? Is it best to start a new repo with the initial commit containing all the code with licence headers? Or maybe is there some advanced Git functionality that allows me to apply the licence header to all existing commits some how? Cheers.

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• MVC Pattern, ViewModels, Location of conversion.

  - by Pino

  I've been working with ASP.Net MVC for around a year now and have created my applications in the following way. X.Web - MVC Application Contains Controller and Views X.Lib - Contains Data Access, Repositories and Services. This allows us to drop the .Lib into any application that requires it. At the moment we are using Entity Framework, the conversion from EntityO to a more specific model is done in the controller. This set-up means if a service method returns an EntityO and then the Controller will do a conversion before the data is passed to a view. I'm interested to know if I should move the conversion to the Service so that the app doesn't have Entity Objects being passed around.

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• Performance: recursion vs. iteration in Javascript

  - by mastazi

  I have read recently some articles (e.g. http://dailyjs.com/2012/09/14/functional-programming/) about the functional aspects of Javascript and the relationship between Scheme and Javascript (the latter was influenced by the first, which is a functional language, while the O-O aspects are inherited from Self which is a prototyping-based language). However my question is more specific: I was wondering if there are metrics about the performance of recursion vs. iteration in Javascript. I know that in some languages (where by design iteration performs better) the difference is minimal because the interpreter / compiler converts recursion into iteration, however I guess that probably this is not the case of Javascript since it is, at least partially, a functional language.

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• Array Multiplication and Division

  - by Narfanator

  I came across a question that (eventually) landed me wondering about array arithmetic. I'm thinking specifically in Ruby, but I think the concepts are language independent. So, addition and subtraction are defined, in Ruby, as such: [1,6,8,3,6] + [5,6,7] == [1,6,8,3,6,5,6,7] # All the elements of the first, then all the elements of the second [1,6,8,3,6] - [5,6,7] == [1,8,3] # From the first, remove anything found in the second and array * scalar is defined: [1,2,3] * 2 == [1,2,3,1,2,3] But What, conceptually, should the following be? None of these are (as far as I can find) defined: Array x Array: [1,2,3] * [1,2,3] #=> ? Array / Scalar: [1,2,3,4,5] / 2 #=> ? Array / Scalar: [1,2,3,4,5] % 2 #=> ? Array / Array: [1,2,3,4,5] / [1,2] #=> ? Array / Array: [1,2,3,4,5] % [1,2] #=> ? I've found some mathematical descriptions of these operations for set theory, but I couldn't really follow them, and sets don't have duplicates (arrays do). Edit: Note, I do not mean vector (matrix) arithmetic, which is completely defined. Edit2: If this is the wrong stack exchange, tell me which is the right one and I'll move it. Edit 3: Add mod operators to the list. Edit 4: I figure array / scalar is derivable from array * scalar: a * b = c => a = b / c [1,2,3] * 3 = [1,2,3]+[1,2,3]+[1,2,3] = [1,2,3,1,2,3,1,2,3] => [1,2,3] = [1,2,3,1,2,3,1,2,3] / 3 Which, given that programmer's division ignore the remained and has modulus: [1,2,3,4,5] / 2 = [[1,2], [3,4]] [1,2,3,4,5] % 2 = [5] Except that these are pretty clearly non-reversible operations (not that modulus ever is), which is non-ideal. Edit: I asked a question over on Math that led me to Multisets. I think maybe extensible arrays are "multisets", but I'm not sure yet.

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• Multithreaded UI desktop application issues

  - by igor

  I am involved into development a rich UI project: desktop windows application. Application uses asynchronous invocations and in its turn it should be ready to process external messages (events). The problem is clear: at first time it was built as a simple prototype and it was not stress tested and all was fine. Then application was grown: the number of calls to server and number of events from server are high and performance is low. What is more users noticed that sometimes performance is extremal low. Asynchronous invocations based on thread pool (BeginInvoke, EndInvoke), external events are going from WCF service (.NET 3.5). My goal is synchronization of all tasks and putting priorities to every executions in desktop application. My question is: is there any practice how to reach my goal: patterns, task priority list, others? What should I do at first, second and next times? Thanks

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• WCF or ASMX WebService

  - by karthi

  I have been asked to create a web service that communicates with Auth.NET CIM and Shipsurance API. This web service will be used by multiple applications (one a desktop and another a web application). Am confused whether to go for WCF or asmx web service . Auth.NET CIM and Shipsurance API have asmx webservices which i would be calling in my newly created web service.So is WCF the right way to Go or can i stay with asmx? Can Some one please guide. Let me know if this question is inappropriate here and needs to be moved to stackoverflow or somewhere else.

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• What could be my path? Networking, programming, or something else?

  - by momong

  Well first and foremost, I would like to give my brief description: I was an aviation student but I didn't pursue that path because I lost my interest. Now I'm an I.T. student and currently stopped schooling because of confusion. I don't know which path I should choose: could it be programming or networking? Someone told me that on networking the money is easy, the job is easy. Others told me that programming is best suited for me because I'm very skilled and excellent at figures. I want to chose networking, but I can't find my passion for it, my mind tells me but my heart doesn't... and on programming, I don't know which language I should pick or if I like it or not. A good mentor, even if only online, would be a very big plus to me, but I don't think if there are many who could spent their time on teaching a nobody... but I'm very eager to learn. My real passion is gaming! I want to work in the gaming industry, I want to be a man behind those games! I've been a gamer freak since birth. But I don't know how to get in to that industry. I don't know what to do. I don't know which path would really suit me. Sorry if some of you find this a pointless question, but please bear with me, this could be the turn of my life.

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• Why (not) logic programming?

  - by Anto

  I have not yet heard about any uses of a logical programming language (such as Prolog) in the software industry, nor do I know of usage of it in hobby programming or open source projects. It (Prolog) is used as an academic language to some extent, though (why is it used in academia?). This makes me wonder, why should you use logic programming, and why not? Why is it not getting any detectable industry usage?

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• What have we lost from computers 20 years ago

  - by Martin Beckett

  Following the theme of - I can't believe computers used floppy disks and did you have debuggers 20 years ago - questions (and because even putting my age in hex I don't look young anymore). What have we lost from computers 20years ago? VMS versioning file system. Make a mistake, no problem myprog.cpp;5 is still there. Home computers that powered up to give you a wordprocessor or a basic prompt in <0.5sec User ports, serial ports and ADCs that you could control things with - without an arduino APIs that actually did what they said (even DOS interrupts), without having to guess and experiment your way through layers of frameworks.

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• Determine whether a link points to a file on local host or foreign domain [migrated]

  - by user107157

  This has been a burning question for me ever since and I think it's interesting enough to discuss it on the forums. As most will know, in websites we include anchor links, stylesheets, script files (javascript) and images. For anchor links we use the form <a href="..." /> For stylesheets we may use the form <link rel="stylesheet" type="text/css" href="..." /> For javascript we may use <script src="..." /> For images we use <img src="..." /> So, the question is this: How do we know that what is in the link pointer (i.e. replacing the ... in each example) is a local file or a foreign entity? To make it clear, lets say I create a local file named "ashish.com". Now, my purpose is to create a link so that anybody who clicks on it may download it. So, my code would be thus: <a href="ashish.com">Download It</a> But this makes it ambiguous. I could also be referring to a website named "ashish.com" So, how does the computer magically know which one I mean? Or does it even know this? What would happen in such a scenario?

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• What is the problem git submodules are supposed to solve?

  - by Joshua Dance

  What is the problem that git submodules solve well? When should I use them? Or rather what is their use case? The only use of submodules that I have seen 'in the wild' has been when used to share code between multiple repositories. From what I have experienced, submodules do not appear to be ideally suited to this use case. You run into git update submodule woes and your history gets filled with updating submodule pointer commits. If the 'sharing code' use case is not best solved by submodules, what problems are?

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• How much detail is in a good UI regression test?

  - by GlenPeterson

  We use a detailed step-by-step user-interface regression test for our commercial web application. It has a "backbone" test for the most used / most important parts of the system, with optional tests for specific areas of functionality. Using this plan has definitely helped us ensure high quality software. But, having very specific tests can be counter-productive. The tester concentrates on following the test and will completely miss usability issues, or not notice fairly obvious problems such as the bottom part of a page that is missing. By contrast, some of the best UI testing happens when building a demo of a new feature. I often do my own best testing by pretending to demonstrate the system to an imaginary prospect. Yet when I tell the testers, "Just demonstrate the system to yourself" they don't cover nearly as much functionality as they do with a detailed point-by-point test. I'm repeatedly asked to provide more and more detail in the test plan so that a new untrained tester can test with it without asking any questions. Yet details seem to be counter-productive. How much detail do you put in a regression test to make it effective? What techniques make the tester to focus more on the system than on checking off items on the test?

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• Low level programming - what's in it for me?

  - by back2dos

  For years I have considered digging into what I consider "low level" languages. For me this means C and assembly. However I had no time for this yet, nor has it EVER been neccessary. Now because I don't see any neccessity arising, I feel like I should either just schedule some point in time when I will study the subject or drop the plan forever. My Position For the past 4 years I have focused on "web technologies", which may change, and I am an application developer, which is unlikely to change. In application development, I think usability is the most important thing. You write applications to be "consumed" by users. The more usable those applications are, the more value you have produced. In order to achieve good usability, I believe the following things are viable Good design: Well-thought-out features accessible through a well-thought-out user interface. Correctness: The best design isn't worth anything, if not implemented correctly. Flexibility: An application A should constantly evolve, so that its users need not switch to a different application B, that has new features, that A could implement. Applications addressing the same problem should not differ in features but in philosophy. Performance: Performance contributes to a good user experience. An application is ideally always responsive and performs its tasks reasonably fast (based on their frequency). The value of performance optimization beyond the point where it is noticeable by the user is questionable. I think low level programming is not going to help me with that, except for performance. But writing a whole app in a low level language for the sake of performance is premature optimization to me. My Question What could low level programming teach me, what other languages wouldn't teach me? Am I missing something, or is it just a skill, that is of very little use for application development? Please understand, that I am not questioning the value of C and assembly. It's just that in my everyday life, I am quite happy that all the intricacies of that world are abstracted away and managed for me (mostly by layers written in C/C++ and assembly themselves). I just don't see any concepts, that could be new to me, only details I would have to stuff my head with. So what's in it for me? My Conclusion Thanks to everyone for their answers. I must say, nobody really surprised me, but at least now I am quite sure I will drop this area of interest until any need for it arises. To my understanding, writing assembly these days for processors as they are in use in today's CPUs is not only unneccesarily complicated, but risks to result in poorer runtime performance than a C counterpart. Optimizing by hand is nearly impossible due to OOE, while you do not get all kinds of optimizations a compiler can do automatically. Also, the code is either portable, because it uses a small subset of available commands, or it is optimized, but then it probably works on one architecture only. Writing C is not nearly as neccessary anymore, as it was in the past. If I were to write an application in C, I would just as much use tested and established libraries and frameworks, that would spare me implementing string copy routines, sorting algorithms and other kind of stuff serving as exercise at university. My own code would execute faster at the cost of type safety. I am neither keen on reeinventing the wheel in the course of normal app development, nor trying to debug by looking at core dumps :D I am currently experimenting with languages and interpreters, so if there is anything I would like to publish, I suppose I'd port a working concept to C, although C++ might just as well do the trick. Again, thanks to everyone for your answers and your insight.

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• Separation of development responsibilities in a new project

  - by dreza

  We have very recently started a new project (MVC 3.0) and some of our early discussion has been around how the work and development will be split amongst the team members to ensure we get the least amount of overlap of work and so help make it a bit easier for each developer to get on and do their work. The project is expected to take about 6 months - 1 year (although not all developers are likely to be on and might filter off towards the end), Our team is going to be small so this will help out a bit I believe. The team will essentially consist of: 3 x developers (All different levels i.e. more senior, intermediate and junior) 1 x project manager / product owner / tester An external company responsbile for doing our design work General project/development decisions so far have included: Develop in an Agile way using SCRUM techniques (We are still very much learning this approach as a company) Use MVVM archectecture Use Ninject and DI where possible Attempt to use as TDD as much as possible to drive development. Keep our controllers as skinny as possible Keep our views as simple as possible During our discussions two approaches have been broached as too how to seperate the workload given our objectives outlined above. OPTION 1: A framework seperation where each person is responsible for conceptual areas with overlap and discussion primarily in the integration areas. The integration areas would the responsibily of both developers as required. View prototypes (**Graphic designer**) | - Mockups | Views (Razor and view helpers etc) & Javascript (**Developer 1**) | - View models (Integration point) | Controllers and Application logic (**Developer 2**) | - Models (Integration point) | Domain model and persistence (**Developer 3**) OPTION 2: A more task orientated approach where each person is responsible for the completion of the entire task (story) from view - controller - model. QUESTION: For those who have worked in small teams developing MVC projects how have you managed the workload distribution in this situation. I can't imagine the junior would be responsible for building parts of the underlying architecture so would given them responsibility for the view make sense considering we are trying to keep it simple?

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• Windows Phone 8 development on Windows 7 - is it or will be possible?

  - by Tiby

  I was trying to install Windows Phone 8 SDK on my Windows 7 machine and it hit me with the 'supported only on Windows 8' message. I actually wanted to develop Phone 7.5 apps on Visual Studio 2012, impossible thing with the 7.1 SDK, so I thought 8 SDK will do the job. As if it was not enough that the 8 SDK was controversial upon release, now that it's generally available, to me it seems like a horrible decision to make it available only for Windows 8, because in my humble opinion, no serious and sane developer will install Windows 8 ever, or at least in the near future, just because of the Metro UI. So, anyone knows any workarounds for developing Windows Phone 8 on Windows 7, or at least develop for 7.5 but using Visual Studio 2012?

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• How do I choose a package format for Linux software distribution?

  - by Ian C.

  We have a Java-based application that, to date, we've been distributing as a tarball with instructions for deploying. It's mostly self-contained so deployment is fairly straight-forward: Untar on the disk you'd like it to live on; Make sure Java is in your path and a suitable distro and version; Verify ownership and group on all the files Start up the server processes with our start script If the user wants to get in to start-on-boot stuff with SysV we have some written instructions and a template init file for it in our tarball. We'd like to make this installation process a little more seamless; take care of the permissions and the init script deployment. We're also going to start bundling our own JRE with the application so that we're mostly free of external dependencies. The question we're faced with now is: how do we pick a package format for distribution? Is RPM the standard? Can all package management tools deal with it now? Our clients primarily run RHEL and CentOS, but we do have some using SuSE and even Debian. If we can pick a distro-agnostic format we'd prefer that. What about a self-extracting shell script? Something akin to how Java is distributed. If we're dependency-free would the self-extracting script be sufficient? What features or conveniences would we lose out on going with the script versus a proper package format meant for use by a package manager?

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• Which PHP framework is best for Facebook app?

  - by ohho

  I am new on Facebook app. The majority of Facebook sample apps are in PHP. Is there a PHP framework which integrates with Facebook (Graph) API you'd recommend? I am looking for features listed below and don't want to reinvent the wheels: link a Facebook user id to a local user profile database detect whether user has liked the app detect whether user has granted access the app write on user's wall (status/photo) Thanks!

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