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  • How can I select a column with no values?

    - by Lye
    I have a table with thousands of rows and hundreds of columns (not my design). I'm trying to find out which columns are never used so I can simplify the table a little. How can I find which of the columns have no value in all rows?

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  • Getting up to speed on modern architecture

    - by Matt Thrower
    Hi, I don't have any formal qualifications in computer science, rather I taught myself classic ASP back in the days of the dotcom boom and managed to get myself a job and my career developed from there. I was a confident and, I think, pretty good programmer in ASP 3 but as others have observed one of the problems with classic ASP was that it did a very good job of hiding the nitty-gritty of http so you could become quite competent as a programmer on the basis of relatively poor understanding of the technology you were working with. When I changed on to .NET at first I treated it like classic ASP, developing stand-alone applications as individual websites simply because I didn't know any better at the time. I moved jobs at this point and spent the next several years working on a single site whose architecture relied heavily on custom objects: in other words I gained a lot of experience working with .NET as a middle-tier development tool using a quite old-fashioned approach to OO design along the lines of the classic "car" class example that's so often used to teach OO. Breaking down programs into blocks of functionality and basing your classes and methods around that. Although we worked under an Agile approach to manage the work the whole setup was classic client/server stuff. That suited me and I gradually got to grips with .NET and started using it far more in the manner that it should be, and I began to see the power inherent in the technology and precisely why it was so much better than good old ASP 3. In my latest job I have found myself suddenly dropped in at the deep end with two quite young, skilled and very cutting-edge programmers. They've built a site architecture which is modelling along a lot of stuff which is new to me and which, in truth I'm having a lot of trouble understanding. The application is built on a cloud computing model with multi-tenancy and the architecture is all loosely coupled using a lot of interfaces, factories and the like. They use nHibernate a lot too. Shortly after I joined, both these guys left and I'm now supposedly the senior developer on a system whose technology and architecture I don't really understand and I have no-one to ask questions of. Except you, the internet. Frankly I feel like I've been pitched in at the deep end and I'm sinking. I'm not sure if this is because I lack the educational background to understand this stuff, if I'm simply not mathematically minded enough for modern computing (my maths was never great - my approach to design is often to simply debug until it works, then refactor until it looks neat), or whether I've simply been presented with too much of too radical a nature at once. But the only way to find out which it is is to try and learn it. So can anyone suggest some good places to start? Good books, tutorials or blogs? I've found a lot of internet material simply presupposes a level of understanding that I just don't have. Your advice is much appreciated. Help a middle-aged, stuck in the mud developer get enthusastic again! Please!

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  • What setup in .Net would most resemble Django

    - by Mingus Rude
    At work we are inte process of starting development on a new web-based product. Before doing so we need to establish what technology stack we are going to use. For this application my preference would have been to use Django but since the development- and management-team is soo heavily rooted with Microsoft the new product will have to be based on Microsoft technologies. So my question is, what setup, with Microsoft technologies, would most resemble a django setup with its MVT-design?

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  • Application security issues to consider

    - by user279521
    I am working on the design of a high security application (involving financial information, personal information etc). I need to identify what security measures (application level) will be implemented. The application will involve sending data to and from a database, user login, import export to csv, txt files, and print function. What security features do I need to consider for such an application. (SQL injection for starters) ?

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  • What programming language to choose

    - by Pradeep
    We need to write a script that needs to process movies (using C-based ffmpeg) and also update our databases. Also there would be some thread programming to accomplish with a worker-manager design. I am thinking of writing this in Ruby is there any good language to do this, if so what is its primary advantage for choosing? We are based on the Mac platform. Thanks in advance.

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  • Why does Mercurial only have one level of rollback?

    - by Nick Pierpoint
    I understand the restrictions of rollback and the care required in its use (for example, http://www.selenic.com/mercurial/hg.1.html#rollback), but I just wondered why there is only 1 level of rollback. My guess it's a design decision and that the hassle of storing multiple previous transactional states to handle multiple levels of rollback is more trouble than its worth.

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  • Oracle Rows into Columns

    - by user2904845
    Can someone help me design the query to get below o/p. Data I have: Table X: Count Name Amount Days 5 ABC 500 Day1 10 ABC 1000 Day2 3 BCD 100 Day1 4 BDC 200 Day2 Result I need: Name Count AmountDay1 Count AmountDay2 ABC 5 500 10 1000 BCD 3 100 4 200 etc Is this Possible? I tried something with the below query, but not getting the desired o/p select * from X pivot (sum(amount) for days in ('Day1', 'Day2')) Please help I'm using Oracle 11 G

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  • stack panel width and height to zero in .cs

    - by prince23
    hi , have an stack panel defined in my design page <StackPanel Width="973" x:Name="spmarks" > </StackPanel> now in .cs page i need to set the width and height of the stack panel to zero spmarks.ActualWidth ="0"; spmarks.ActualWidth ="0"; here i am getting error. how can i set width and height to zero now any solution on this would be great thank you

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  • how to stop my html page resize

    - by From.ME.to.YOU
    hello i made an HTML page with all widths and heights as percentage "that's primary for my design to work with all resolutions" but when i re-size my web browser everything will be damaged. is there a way that when i re-size my web browser i can scroll the page ? Thanks

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  • Reinject dependencies of a freshly deserialized object

    - by NathanE
    If a program has literally just deserialized an object (doesn't really matter how, but just say BinaryFormatter was used). What is a good design to use for re-injecting the dependencies of this object? Is there a common pattern for this? I suppose I would need to wrap the Deserialize() method up to act as a factory inside the container. Thanks!

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  • Moving graphical components with the mouse in Visual Studio

    - by Anto
    I have just installed Visual Studio.NET. In the Design area I have added some graphical components (button, textbox) but I can't move these within the specified area, as their position remains unchanged. I would like to move these graphical components with the mouse cursor, I know it's possible, does anyone know how?

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  • Website with an iframe inside

    - by user1328929
    Does anyone have any ideas how to design a website with an iframe inside , like a gallery , to browse inside urls , but still remain on the basic site ? Something like this : http://ru.trovit.com/nedvizhimost/index.php/cod.frame/url.http%253A%252F%252Fwww.mesto.ru%252Fhouse-sale%252F1165477/id_ad.123131lZaNE/type.1/what.%D0%B4%D0%BE%D0%BC%20%D0%BB%D0%B5%D0%BD%D0%B8%D0%BD%D0%B3%D1%80%D0%B0%D0%B4%D1%81%D0%BA%D0%B0%D1%8F%20%D0%BE%D0%B1%D0%BB%D0%B0%D1%81%D1%82%D1%8C/pos.2/org.1/frame_pos.2/publisher_id./referer_id.51/t.1

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  • Tools used by professional web designers.

    - by Gnarly
    What are some tools that the professionals use? I want to make some professional looking designs for myself, but don't know where to start. I have 4 years of programing experience and about 5 years of web design experience, but I'm just not good with designing a layout.

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  • Native API window designer

    - by Ricardo
    Why isn't there a designer for native api forms in Visual Studio? Similar to Delphi? If there exist some programs, tools etc, please advice. What is the best approach to design complex windows in pure API?

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  • Introduction to Subversion for Developers

    - by wandiscoGeorge
    The second course in the series, "Introduction to Subversion for Developers" will take place on Wednesday, May 5, 2010 at 9AM PDT. Subversion's architecture and design principles will be covered and attendees will be introduced to using Subversion for software development. http://wandisco.com/webinar/subversion/training/intro_for_devs

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  • Please suggest ASP.Net source editor

    - by Jerry
    Can someone suggest ASP.Net source editor which I can integrate into my web site expected features: Highlight ASP.Net source code, including server code / javascript code / html / css Intelligent suggesting when typing the code. (this is optional) "Design View" is not required. I just need the code view, please suggest, thank you

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  • Sending SMS using Java ME application

    - by iamrohitbanga
    I want to a Java ME application that transfers any SMS received to a PC using bluetooth. The PC can then direct the Java ME application via bluetooth to send a response SMS. Is there library available for this architecture or I have to design it myself? Is this approach correct or a better one exists? I want to use bluetooth as then I will not have dependency on the cable.

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  • Can the google map API return a street address that was clicked.

    - by Code
    Hi guys, I'm trying to work out an app design in my head and I would like the user to be able to click there destination address on the map of there area. If I know the user is in Liverpool is it possible to pop up the map over liverpool and then allow the user to select on the map where they wanna go, and the google map/api return the street or the name of the area? I've never used googlemap/api yet so just wondering if this kind of thing is possible on the iphone yet. Many Thanks -Code

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  • How can I persuade our team to use mac as our development platform?

    - by Allen Bargi
    I'm joining a start up and there's a debate on which platform we should choose for our development; Mac, Linux or Windows? We're gonna use mainly open source tools and languages like, ruby, rails, PHP and mysql and photoshop (or something equivalent on Linux) for design. I suggested mac but they challenged me to be more persuasive. what's your idea? Help me with your persuasive arguments please.

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  • What font and size is used in Windows 7 File Explorer Tree

    - by Stefan Koell
    I am having a hard time to find out which font is used by the Win 7 File Explorer in the tree view on the left hand side. Better, of course, would be if I can programmatically find out which the right font is (C#). I searched the Windows 7 design guidelines but this particular scenario is not listed (at least I couldn't find it). So anyone good with fonts?

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  • How can I change a connection string, or other app settings, at test time in Visual Studio 2008?

    - by David
    I need to test a class library project in VS. This project, itself, does not have a web.config file, but the classes do on the web server to which it's deployed. I access these like this: ConfigurationManager.ConnectionStrings["stringname"].ConnectionString; Can I adjust these strings while running unit tests in VS? Should I have considered a different design method to avoid this problem?

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  • Use multiple inheritance to discriminate useage roles?

    - by Arne
    Hi fellows, it's my flight simulation application again. I am leaving the mere prototyping phase now and start fleshing out the software design now. At least I try.. Each of the aircraft in the simulation have got a flight plan associated to them, the exact nature of which is of no interest for this question. Sufficient to say that the operator way edit the flight plan while the simulation is running. The aircraft model most of the time only needs to read-acess the flight plan object which at first thought calls for simply passing a const reference. But ocassionally the aircraft will need to call AdvanceActiveWayPoint() to indicate a way point has been reached. This will affect the Iterator returned by function ActiveWayPoint(). This implies that the aircraft model indeed needs a non-const reference which in turn would also expose functions like AppendWayPoint() to the aircraft model. I would like to avoid this because I would like to enforce the useage rule described above at compile time. Note that class WayPointIter is equivalent to a STL const iterator, that is the way point can not be mutated by the iterator. class FlightPlan { public: void AppendWayPoint(const WayPointIter& at, WayPoint new_wp); void ReplaceWayPoint(const WayPointIter& ar, WayPoint new_wp); void RemoveWayPoint(WayPointIter at); (...) WayPointIter First() const; WayPointIter Last() const; WayPointIter Active() const; void AdvanceActiveWayPoint() const; (...) }; My idea to overcome the issue is this: define an abstract interface class for each usage role and inherit FlightPlan from both. Each user then only gets passed a reference of the appropriate useage role. class IFlightPlanActiveWayPoint { public: WayPointIter Active() const =0; void AdvanceActiveWayPoint() const =0; }; class IFlightPlanEditable { public: void AppendWayPoint(const WayPointIter& at, WayPoint new_wp); void ReplaceWayPoint(const WayPointIter& ar, WayPoint new_wp); void RemoveWayPoint(WayPointIter at); (...) }; Thus the declaration of FlightPlan would only need to be changed to: class FlightPlan : public IFlightPlanActiveWayPoint, IFlightPlanEditable { (...) }; What do you think? Are there any cavecats I might be missing? Is this design clear or should I come up with somethink different for the sake of clarity? Alternatively I could also define a special ActiveWayPoint class which would contain the function AdvanceActiveWayPoint() but feel that this might be unnecessary. Thanks in advance!

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