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• complicated graphviz tree structure

  - by thomas

  Hello. I am trying to create a tree structure with graphviz. I am open to either writing the graphviz code by hand or using the ruby-graphviz gem for ruby. Given the below picture can anyone provide any insight on the necessary code? Ignore that the lines are not straight...they should be when graphviz builds the graph. I am open to having dots/points when lines intersect as well. I have played with ruby-graphviz and the family tree class...this is getting me part of the way there but I really need all lines to be straight and intersect at right angles and the out-of-the-box code doesn't seem to do that.

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• How to structure VB.NET windows forms applications

  - by Jon

  What is the best way to structure a VB.NET windows forms application so that code can be reused and the app can be extended easily. I used to create lots of new forms. This lead to lots of repeated code and forms which did similar things. Now, for forms which do similar jobs, such as view/edit/delete items from a specific db table, I create a form with the required controls, have the form create an instance of a class with params such as a collection of the controls and a string containing the db table name. Then the individual controls call functions of the class. Advanced forms will inherit and extend this basic form class. 1) Has there already been work done in this area? 2) Are there books / articles available which discuss the options available on this topic? Thanks!

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• Loading WPF satellite resources dynamically

  - by BJ

  Hello! I've read about satellite-assemblies being used in WPF localizations. However, I would like to ask if there is a way to load the satellite-assemblies without following the pre-defined directory structure that depends on the language (ex. If the system language is English, the WPF application looks for the satellite-assembly inside the "en-US" subfolder). This is because I would like to simply swap the satellite-assemblies when distributing the software package without having to create a specific folder per language that would hold the assemblies. I would just like to have the satellite-assembly and the main executable in the same directory. Is this possible and is there even an easy way to do this like simply loading the resource file on application startup once? Thanks!

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• Tree data structure in iphone with coredata

  - by ebabchick

  Hi, I am looking to store a tree structure in CoreData for iphone. Can someone give me some tips on the best way to go about this? Basically I want to have a bunch of folders that people can dive into in a table view, and I want to have leaves of the tree be photos. The thing is, I want to be able to let the user edit these folders on-the-fly and add folders and content (photos) at their discretion. I'm relatively new to CoreData. Any help would be appreciated. Thanks.

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• What is the structure of a (Data Access) Service Class

  - by jiewmeng

  I learnt that I should be using service classes to persist entities into the database instead of putting such logic in models/controllers. I currently made my service class something like class Application_DAO_User { protected $user; public function __construct(User $user) { $this->user = $user } public function edit($name, ...) { $this->user->name = $name; ... $this->em->flush(); } } I wonder if this should be the structure of a service class? where a service object represents a entity/model? Or maybe I should pass a User object everytime I want to do a edit like public static function edit($user, $name) { $user->name = $name; $this->em->flush(); } I am using Doctrine 2 & Zend Framework, but it shouldn't matter

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• iPhone Core Data: request for member 'tableView' in something not a structure or union

  - by Nic Hubbard

  I am trying to use CoreData to populate a UITableView. I have been using the developer "Locations" project, and I think I have everything correct. But, now I am getting the following error when I build: request for member 'tableView' in something not a structure or union Why would it be confused about tableView? I am using it many times in the methods. The errors seem to be coming from: [self.tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; [self.tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0] atScrollPosition:UITableViewScrollPositionTop animated:YES]; Ideas?

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• TortoiseSVN: how to set up projects on a existing directory structure of source code

  - by Steve

  I have an old pet project I want to revive (haven't had enough time for it last year - small kid - you know) - so restored old copy of my dev folder from archive, but since I have rebuilt my machine since when - I can't remember what needs to be done now. I installed the latest version of TortoiseSVN, and the existing directory structure from my old dev machine looks like: ProjectName *SubProject1 **branches ***1.1 ***1.2 **tags **trunk *SubProject2 **branches **1.0.3 **1.0.4 **1.0.5 **tags **trunk I tried "import project" but it ask for a url - don't know what to specify there ... can someone post a url to a good TortSVN tutorial - so I could set up my projects quickly (I guess I need to setup SubProject1 and SubProject2) - then I install AnkhSVN for VS2008 and will spend this Sunday coding like crazy while I still have some time ;-)

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• Data structure for Settlers of Catan map?

  - by templatetypedef

  Hello all- A while back someone asked me if I knew of a nice way to encode the information for the game Settlers of Catan. This would require storing a hexagonal grid in a way where each hex can have data associated with it. More importantly, though, I would need some way of efficiently looking up vertices and edges on the sides of these hexagons, since that's where all the action is. My question is this: is there a good, simple data structure for storing a hexagonal grid while allowing for fast lookup of hexagons, edges between hexagons, and vertices at the intersections of hexagons? I know that general structures like a winged-edge or quad-edge could do this, but that seems like massive overkill. Thanks!

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• How to find out memory layout of your data structure implementation on Linux 64bit machine

  - by ajay

  In this article, http://cacm.acm.org/magazines/2010/7/95061-youre-doing-it-wrong/fulltext the author talks about the memory layouts of 2 data structures - The Binary Heap and the B-Heap and compares how one has better memory layout than the other. http://deliveryimages.acm.org/10.1145/1790000/1785434/figs/f5.jpg http://deliveryimages.acm.org/10.1145/1790000/1785434/figs/f6.jpg I want to get hands on experience on this. I have an implementation of a N-Ary Tree and I want to find out the memory layout of my data structure. What is the best way to come up with a memory layout like the one in the article? Secondly, I think it is easier to identify the memory layout if it is an array based implementation. If the implementation of a Tree uses pointers then what Tools do we have or what kind of approach is required to map it's memory layout? Thanks!

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• Database structure - To join or not to join

  - by Industrial

  Hi! We're drawing up the database structure with the help of mySQL Workbench for a new app and the number of joins required to make a listing of the data is increasing drastically as the many-to-many relationships increases. The application will be quite read-heavy and have a couple of hundred thousand rows per table. The questions: Is it really that bad to merge tables where needed and thereby reducing joins? Should we start looking at horizontal partitioning? (in conjunction with merging tables) Is there a better way then pivot tables to take care of many-to-many relationships? We discussed about instead storing all data in serialized text columns and having the application make the sorting instead of the database, but this seems like a very bad idea, even though that the database will be heavily cached. What do you think? Thanks!

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• Best Data Structure For Time Series Data

  - by TriParkinson

  Hi all, I wonder if someone could take a minute out of their day to give their two cents on my problem. I would like some suggestions on what would be the best data structure for representing, on disk, a large data set of time series data. The main priority is speed of insertion, with other priorities in decreasing order; speed of retrieval, size on disk, size in memory, speed of removal. I have seen that B+ trees are often used in database because of their fast search times, but how about for fast insertion times? Is a linked list really the way to go? Thanks in advance for your time, Tri

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• Changing database structure at runtime with Entity Framework?

  - by Teddy

  Hi. I have to write a solution that uses different databases with different structure from the same code. So, when a user logs to the application I determine to which database he/she is connected to at runtime. The user can create tables and columns at any time and they have to see the change on the fly. The reason that I use one and the same code the information is manipulates the same way for the different databases. How can I accomplish this at runtime? Actually is the Entity Framework a good solution for my problem? Thanks in advance.

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• Implementation of a general-purpose object structure (property bag)

  - by Thomas Wanner

  We need to implement some general-purpose object structure, much like an object in dynamic languages, that would give us a possibility of creating the whole object graph on-the-fly. This class has to be serializable and somehow user friendly. So far we have made some experiments with class derived from Dictionary<string, object> using the dot notation path to store properties and collections in the object tree. We have also find an article that implements something similar, but it doesn't seem to fit completely into our picture either. Do you know about some good implementations / libraries that deal with a similar problem or do you have any (non-trivial) ideas that could help us with our own implementation ? Also, I probably have to say that we are using .NET 3.5, so we can't take advantage of the new features in .NET 4.0 like dynamic type etc. (as far as I know it's also not possible to use any subset of it in .NET 3.5 solution).

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• Looking for a good database structure to achieve Facebook/SO like notifications

  - by user156814

  I want to be able to have notifications on my site, similar to the way SO does it. I have looked for a good table structure to do this, but I cant seem to figure it out. I was thinking something like this. Notifications id, notification_type_id, user_id, type_id Notification Types id, notification_text Where the notification type would relate to either a new post, a new comment, or whatever features I add later down the line... User Id would relate to whoever the notification is for. Type_id and notification type would go hand in hand, so if the notification_type was a new comment, the type_id would be the comment_id to go to. This seems good to me, but i want to be able to notify ALL users when something changes.. like on facebook when you comment on something, you get a notification that someone else has also commented on the same thing after you. I cant seem to figure this out... Help wanted Thanks

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• data structure problems

  - by Ashish

  hey guys, please help me in finding the solution to some of these Amazon questions: given a file containing approx 10 million words, design a data structure for finding the anagrams Write a program to display the ten most frequent words in a file such that your program be efficient in all complexity measures. you have a file with millions of lines of data. Only two lines are identical; the rest are all unique. Each line is so long that it may not even fit in the memory. What is the most efficient solution for finding the identical lines?

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• Why this structure should have 48 bytes

  - by Maksee

  I tried to translate some new part of winuser.h header to Delphi. Why this structure is expected to be 48 bytes (only this size was accepted by the corresponding function). With 4-bytes boundary, it looks like it should have 40 bytes. typedef struct tagGESTUREINFO { UINT cbSize; DWORD dwFlags; DWORD dwID; HWND hwndTarget; POINTS ptsLocation; DWORD dwInstanceID; DWORD dwSequenceID; ULONGLONG ullArguments; UINT cbExtraArgs; } GESTUREINFO, *PGESTUREINFO; If it's related to 8-bytes boundary? if so is it relevant to any case where ULONGLONG appears structures? Thanks

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• setting source classpath in eclipse with stupid project structure

  - by lisak

  What do you guys do, when you have huge project built with ant for instance, where the source folders are right bellow the root project folder, for building classpath from source files ? putting entire project as a source folder is nonsense. Putting separate folders as source folders can't be done if they are part of the package hierarchy and the only thing I could think of, is to copy the source folders into a separate folder and add it then as source folder which is weird but I don't know how else to do it. Having to duplicate sources just because of the eclipse way of making classpath and also because of somebody doing stupid project structure

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• Optimizing Class Structure

  - by Derek Hammer

  I have the following class structure (abbreviated for sake of time, names changed) in my application. When I was writing the code I felt that the similarities between Action1 and Action2 should warrant some sort of generalization. I've provided the UML Class diagram with the relevant parts (except for the interfaces, which I describe in code below). I was wondering if anyone had an idea on how to make this "better" architecture / class design. Also, actions that are very similar could be implemented in a near-future iteration. Code for interfaces public IActor1 { public Property1 { get; set; } public Property2 { get; set; } } public IActor2 { public Property3 { get; set; } public Property2 { get; set; } }

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• How to structure Python package that contains Cython code

  - by Craig McQueen

  I'd like to make a Python package containing some Cython code. I've got the the Cython code working nicely. However, now I want to know how best to package it. For most people who just want to install the package, I'd like to include the .c file that Cython creates, and arrange for setup.py to compile that to produce the module. Then the user doesn't need Cython installed in order to install the package. But for people who may want to modify the package, I'd also like to provide the Cython .pyx files, and somehow also allow for setup.py to build them using Cython (so those users would need Cython installed). How should I structure the files in the package to cater for both these scenarios? The Cython documentation gives a little guidance. But it doesn't say how to make a single setup.py that handles both the with/without Cython cases.

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• Is there a way to extracting semantic informations from PDF? (converting PDF to pure XHTML)

  - by Eonil

  Hi. I'm finding a way to extract semantic structural informations (like title, heading, paragraph or lists) from PDF. Because I want to get a pure structural data from PDF. Finally, I want to create an pure XHTML from the PDF. With only structural informations. No design or layout. I know, PDF can be created without any structural information. I don't consider those PDFs. Only regularly well-structured PDFs are considered. I'm new to PDF. So I don't know it offers regular semantic structure or not. If it exists, it's library will offer it. So I want to know whether PDF spec has those information, and best way to get those information if exists.

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• Storing source files outside project file directory in Visual Studio C++ 2009

  - by Skurmedel

  Visual Studio projects assumes all files belonging to the project are situated in the same directory as the project file, or one underneath it. For a particular project (in the non-Visual Studio sense) this is not what I want. I want to store the MSVC-specific files in another folder, because there might be other ways to build the application as well, for example with SCons. Also all the stuff MSVC splurts out clutters the source directory. Example: /source /scons /msvc <- here is where I want my MSVC-specific stuff I can add the files, in Explorer, to the source directory manually, and then link them in Visual Studio with the project. It's not the end of the world, but it annoys me a bit that Visual Studio tries to dictate the folder structure of my project. I was looking through the schemas for the project files but realized that this annoying assumption is in the IDE and not the format of the project files. Do someone know a neater way to solve this than manually linking files to the project from the source directory?

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• how to copy attribute XML node to specified structure or array

  - by jozi

  how to copy attribute XML node to specified structure or array with one command for example public struct PossibilityJavamed { public string derv; public string dervt; public string num; public string gend; } PossibilityJavamed tmpstructnew = tmpstruct; ArrayList alstout = new ArrayList(); XmlNodeList nodeList; nodeList = docHarf.SelectNodes("//adatesmi"); for (int i = 0; i < nodeList.Count; i++) { tmpstructnew.derv = nodeList[i].Attributes["derv"].Value; tmpstructnew.dervt = nodeList[i].Attributes["dervt"].Value; tmpstructnew.num = nodeList[i].Attributes["num"].Value; tmpstructnew.gend = nodeList[i].Attributes["gend"].Value; alstout.Add(tmpstructnew); } but i will do it in one command

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• Dynamically allocated structure and casting.

  - by Simone Margaritelli

  Let's say I have a first structure like this: typedef struct { int ivalue; char cvalue; } Foo; And a second one: typedef struct { int ivalue; char cvalue; unsigned char some_data_block[0xFF]; } Bar; Now let's say I do the following: Foo *pfoo; Bar *pbar; pbar = new Bar; pfoo = (Foo *)pbar; delete pfoo; Now, when I call the delete operator, how much memory does it free? sizeof(int) + sizeof(char) Or sizeof(int) + sizeof(char) + sizeof(char) * 0xFF ? And if it's the first case due to the casting, is there any way to prevent this memory leak from happening? Note: please don't answer "use C++ polymorphism" or similar, I am using this method for a reason.

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• How to structure controller to sort multiple criteria asp.net mvc

  - by Solomon

  Hi, What's the best way to set up a controller to sort by many (possibly null) criteria? Say for example, I was building a site that sold cars. My CarController has a function Index() which returns an IList of cars to the view, and details on each car are rendered with a partial view. What's the best way to structure this? Especially if there are a lot of criteria: Car Type (aka SUV), Car Brand, Car Model, Car Year, Car Price, Car Color, bool IsNew, or if I want to sort by closest to me etc... I'm using NHibernate as my ORM. Should I have just a ton of possible NHibernate queries and figure out which one to choose based on if/then's in the controller? Or is there a simpler way. Thanks so much for the help.

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• (External) Java library for creating Tree structure ?

  - by suVasH.....

  I am planning to implement a tree structure where every node has two children and a parent along with various other node properties (and I'd want to do this in Java ) Now, the way to it probably is to create the node such that it links to other nodes ( linked list trick ), but I was wondering if there is any good external library to handle all this low level stuff. ( for eg. the ease of stl::vector vs array in C++ ). I've heard of JDots, but still since i haven't started (and haven't programmed a lot in Java), I'd rather hear out before I begin.

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