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  • acts_as_tree and to_json or from_json

    - by Sohan
    Hello: Does anyone have a solution to convert an acts_as_tree model to json that includes all its nodes? I trued using :include=:children, but that only goes down to one single level. Any idea how to iterate the whole tree?

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  • How can I avoid huge communication classes in WCF?

    - by mafutrct
    My understanding is that all contract-implementing code has to be in a single class, that can become very large, obviously. How do I avoid this? I really prefer to have a few small classes doing one part of the communication with clients than a single behemoth class. The only idea I could think of is using multiple interfaces implemented by a single class split up by partial, but I don't this this is really solving the issue.

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  • How to retrieve items from a database c#

    - by Poppy
    I have 3 tables "pics", "shows", "showpics" I want to be able to edit the table "shows". In order to do this i need to retrive the pictures that the show contains (the pictures are stored in the table "pics") the "showpics" table acts as a link does anyone have any ideas as im completely lost and have no idea where to even start Thanks

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  • error : [0.8879153] kernel panic -not syncing VFS unable to mount fs unknow block (8.3)

    - by Fiasco
    hello i installed ubuntu using wubit inside the windows and started working on it then i got this error afer updating [0.8879153] kernel panic -not syncing VFS unable to mount fs unknow block (8.3) and i can't user rescue mode and it's give me another error no filesystem could mount root ..... i looked at grub folder and didn' find any file on disks/boot/grub/ so i tryed to user super grub to fix it but it didn' work and it keep giving me. any idea plz .

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  • Creating a C# DLL and using it from unmanaged C++

    - by John
    I have a native (unmanaged) C++ application (using wxWidgets for what it's worth). I'm considering a separate tool application to be written in C# which would contain winform-based dialogs. putting some of those dialogs in a separate DLL would be useful as I'd hope to be able to use them from my C++ app. But I have no idea how much messing about is needed to accomplish this, is it particularly easy?

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  • Where does code within Script tags go in the resulting AS class?

    - by Hanno Fietz
    I was wondering what happens to the code contained in an <mx:Script> tag. If I define a function tehre, it just becomes a member function of the generated class. But I noticed that it seems OK for the compiler if I just write some (static) method calls there (specifically, I call Font.registerFont()). I feel kind of guilty for doing this, because I have no idea what's really happening and when the code gets executed.

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  • Returning an error code in Erlang

    - by Zubair
    I'm writing some Erlang code and I'm very unsure whether I should let everything fail fast. One problem I find with fail fast is that for the developer/user the exception generated is pretty meaningless. Any idea what I should return which would not give esoteric and hard to read stack traces?

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  • jQuery: How to write a function on click, hold and move?

    - by Syom
    I started learning jQuery just yesterday, and I like it very much. And now I decided to write a script where I can change the margin-left of an image when I click on it, hold the clicking and move the mouse. Depending on mouse coordinates I must change the image's margin-left. Could you give me an idea how I can do it? Thanks.

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  • Using rowDiffs() to calculate difference in values in matrix

    - by user1723765
    I'm using the rowDiffs() command to calculate the step by step difference in 116 rows in a matrix. I get the following error: Error in r[i1] - r[-length(r):-(length(r) - lag + 1L)] : non-numeric argument to binary operator I have no idea why this is happening. I could take the diff() separately for each row and it would work. Any ideas? Here's the data: https://dl.dropbox.com/u/22681355/data.csv Code: a=rowDiffs(data)

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  • Cancel the calculation if input-mismatch was found

    - by Lert Pianapitham
    Hallo everybody, i have programmed a sub procedure, that will be called in the main procedure (called by event of mainForm), to valid the inputs before the main calculation. now i'm searching for a method, how can i cancel the calculation and refocus the mainForm if some inputs mismatch. i think, it's unnecessary to use the Try-Catch statment to trap the error from calculation because i know what is its source and it should be prevented due to the code preformance. Has someone an idea to due with this? best regards Lert Pianapitham

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  • Learning Recommendations? Classroom? Tutorials?

    - by cdg
    Hi there. Does anyone have any recommendations for a class (online) or tutorial that teaches android programing for dummies? It's frustrating knowing exactly what you want to do and no idea how to do it. Something that uses basic language and explains each line in detail to help a person remember how to do it later. Any suggestions would be great. Thanks.

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  • Any way to restrict permissions at the subsite in sharepoint

    - by PTT.GHP
    I have a site collection and user A is having Design permissions in it.I created a subsite inheriting parent permissions and now I need to give just read permissions to user A in my subsite. I have tried going to users and group of subsite ..created new group having read permissions and added that user into it...but its not working any idea ...how I can do this?

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  • iPhone Quartz - Open GL

    - by user345473
    Hi all, Does anyone have an idea what do the mind mapping applications use for drawing: Quartz 2D or Open GL? What would be the best way to implement this kind of application? Any advice is welcomed! Thanks!

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  • What should be DefaultLocation property of VS2010 setup to install application in C:\Users\[username

    - by Michael
    I have to install windows service using Visual Studio. Target location for the install is handled by “DefaultLocation” property in Visual Studio setup project. I had used [AppDataFolder] tag to install the application. As the result, it has been installed in “C:\Users[username]\AppData*Roaming*” folder. I can not figure out how to modify “DefaultLocation” property in such a way that application will be installed in C:\Users[username]\AppData*Local* folder. Any idea how to accomplish that?

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  • profiling php inline

    - by mononym
    I'm looking for a solution to profile my php scripts within the browser (rather than having to use *cachegrind) I saw this a while ago http://particletree.com/features/php-quick-profiler/, but i have no idea how good it is (or accurate) tips/advice appreciated

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  • jquery: iterating through various ul's list-items?

    - by user239831
    hey guys, someone already helped me solving the following problem: i wanted to iterate with my up and down arrows through list-items. http://jsfiddle.net/zBjrS/1/ in this example i only had one UL and wanted to navigate through its list-items. meannwhile i have multiple ul's underneath each other and want to navigate seemlessly through all of them as if there were only one UL. http://jsfiddle.net/zBjrS/2/ any idea how i could do that? thank you

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  • Returning binomal as a tuple

    - by Mike
    I want to save the results of my function binomal_aux to a tuple but I don't have an idea how to, here is my code I have right now. def binomal (n): i=0 for i in range(n): binomal_aux(n,i) #want this to be in a tuple so, binomal (2) = (1,2,1) return def binomal_aux (n,k): if (k==0): return 1 elif (n==k): return 1 else: return (binomal_aux(n-1,k) + binomal_aux(n-1,k-1))

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