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• How to index a string like "aaa.bbb.ddd-fff" in Lucene?

  - by user46703

  Hi, I have to index a lot documents that contain reference numbers like "aaa.bbb.ddd-fff". The structure can change but it's always some arbitrary numbers or characters combined with "/","-","_" or some other delimiter. The users want to be able to search for any of the substrings like "aaa" or "ddd" and also for combinations like "aaa.bbb" or "ddd-fff". The best I have been able to come up with is to create my own token filter modeled after the synonym filter in "Lucene in action" which spits out multiple terms for each input. In my case I return "aaa.bbb", "bbb.ddd","bbb.ddd-fff" and all other combinations of the substrings. This works pretty well but when I index large documents (100MB) that contain lots of such strings I tend to get out of memory exceptions because my filter returns multiple terms for each input string. Is there a better way to index these strings?

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• Mimic property/list changes on an object on another object

  - by soundslike

  I need to mimic changes (property/list) changes on an object and then apply it to another object to keep the structure/property the same. In essence it's like cloning etc. the biz rules require certain properties to not be applied to the other object, so I can't just clone the object otherwise this would be easy. I've already walked the source object to get INotifyPropertyChanged and IListChanged events, so I have the "source" and the args (Property or List) changed event notifications. Given that I guess I could build a reflection "hierarchy path" starting from the top level of the source object to get to the Property or List changed "source" (which could be several levels deep). Ignoring for the moment that certain object properties should not propagate to the other object, what's a way to build this "path"? Is a brute force top level down to build the "path" (and discard on the way back up if we don't hit the original changed event "source") the only way to do it? Any clever ideas on how to mimic changes from one object to another object?

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• Is there a way to add an elmah rss feed to google reader?

  - by Jason Irwin

  Elmah has an rss feed and rss digest feature. My feeds are working just fine from within my brwoser. However I would like to add them to google reader as this is my feed reader of choice. The problem is that Elmah uses an AXD handler to server its information - therefore the path to the RSS feed is not a physical one. For example the RSS feed for my site is located at: http://www.mysite.com/errors/elmah.axd/rss This is not a file nor does the folder structure exist - it is all part of the beauty of Elmah. When I attempt to add this virtual path as a feed in google reader i get: Your search did not match any feeds Any help would be greatly appreciated, Thanks Jason

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• Wordpress Taxonomy

  - by ninusik

  I am creating a Wordpress blog (no live link yet because it's still at a planning stage). I want to set up the following tag structure: Category 1: Services Tags: Web design, logo design, print design, etc etc. Category 2: Type of clients Tags: small businesses, large companies So each post will be tagged with one or more tags from Category 1, and one tag from Category 2. However, I heard that using more than one Category per post is a bad idea in terms of SEO? But then, how can I go about it? I don't want any SEO penalties, but I will need to somehow categorize each post using these 2 distinct categories. Should I create some custom taxonomies? That seems like an overkill to me. The solution is probably something rather simple but it just escapes me. I'm not very experienced with taxonomies so I'll appreciate any suggestions.

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• Java's TreeSet equivalent in Python?

  - by viksit

  I recently came across some Java code that simply put some strings into a Java TreeSet, implemented a distance based comparator for it, and then made its merry way into the sunset to compute a given score to solve the given problem. My questions, Is there an equivalent data structure available for Python? The Java treeset looks basically to be an ordered dictionary that can use a comparator of some sort to achieve this ordering. I see there's a PEP for Py3K for an OrderedDict, but I'm using 2.6.x. There are a bunch of ordered dict implementations out there - anyone in particular that can be recommended? Thanks.

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• Getting Prepared/Planning

  - by The.Anti.9

  For the first time, I am trying to create a rather large .NET project. I think the largest one I have made so far was about 6 classes, but this one is already at 14. For the section I'm starting to work on, I'm having some trouble putting everything together in my head, which is what I normally do. I think it's just a little too complex for that. I want to plan it out, and I want some way to visualize it and be able to play with it and manipulate the structure easily. Is there any sort of (free) program I can use to do this?

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• mysql data type confusion

  - by zen

  So this is more of a generalized question about MySQLs data types. I'd like to store a 5-digit US zip code (zip_code) properly in this example. A county has 10 different cities and 5 different zip codes. city | zip code -------+---------- city 0 | 33333 city 1 | 11111 city 2 | 22222 city 3 | 33333 city 4 | 44444 city 5 | 55555 city 6 | 33333 city 7 | 33333 city 8 | 44444 city 9 | 22222 I would typically structure a table like this as varchar(50), int(5) and not think twice about it. (1) If we wanted to ensure that this table had only one of 5 different zip codes we should use the enum data type, right? Now think of a similar scenario on a much larger scale. In a state, there are five-hundred cities with 418 different zip codes. (2) Should I store 418 zip codes as an enum data type OR as an int and create another table to reference?

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• Linq to SQL Azure genrating Error "Specified cast is not valid."

  - by Rabbi

  B"H I have an application that has been working for months using Linq to SQL connecting to a SQLExpress. I tried migrating it to SQL Azure. I copied the structure and data using the Sync Framework. I viewed the data in SQL Azure using SSMS 2008 R2 and it seams to be exactly what I have in my Sql Server. However when I try to use Linq to SQL against it I get an error "Specified cast is not valid." I seams to be happening any time I get child records. i.e. whenever I fill (the first time I access) an entity set. It seams to be happening after the data returns and when Linq tries to put it into the objects. remember, the application is working perfectly against sqlexpress, even when accessed across the internet or vpn.

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• R: How can I reorder the rows of a matrix, data.frame or vector according to another one.

  - by John

  test1 <- as.matrix(c(1, 2, 3, 4, 5)) row.names(test1) <- c("a", "b", "c", "d", "e") test2 <- as.matrix(c(6, 7, 8, 9, 10)) row.names(test2) <- c("e", "d", "c", "b", "a") test1 [,1] a 1 d 2 c 3 b 4 e 5 test2 [,1] e 6 d 7 c 8 b 9 a 10 How can I reorder test2 so that the rows are in the same order as test1? e.g: test2 [,1] a 10 d 7 c 8 b 9 e 6 I tried to use the reorder function with: reorder (test1, test2) but I could not figure out the correct syntax. I see that reorder takes a vector, and I'm here using a matrix. My real data has one character vector and another as a data.frame. I figured that the data structure would not matter too much for this example above, I just need help with the syntax and can adapt it to my real problem.

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• Nicely printing/showing a binary tree in Haskell

  - by nicole

  I have a tree data type: data Tree a b = Branch b (Tree a b) (Tree a b) | Leaf a ...and I need to make it an instance of Show, without using deriving. I have found that nicely displaying a little branch with two leaves is easy: instance (Show a, Show b) => Show (Tree a b) where show (Leaf x) = show x show (Branch val l r) = " " ++ show val ++ "\n" ++ show l ++ " " ++ show r But how can I extend a nice structure to a tree of arbitrary size? It seems like determining the spacing would require me to know just how many leaves will be at the very bottom (or maybe just how many leaves there are in total) so that I can allocate all the space I need there and just work 'up.' I would probably need to call a size function. I can see this being workable, but is that making it harder than it is?

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• Advanced LINQ Update Statement

  - by user1902490

  I have a data base with Price_old like: Date --- Hour --- Price _____________________________ Jan 1 --- 1 --- $3.0 Jan 1 --- 2 --- $3.1 Jan 1 --- 3 --- $3.3 Jan 1 --- 4 --- $3.15 Jan 2 --- 1 --- $2.95 Jan 2 --- 2 --- $3.2 Jan 2 --- 3 --- $3.05 What I then have is a spreadsheet, with the same structure, that I will be reading into a datatable, I'll call the new datatable Price_New, note that price new may not have all the same date/hours as Price_Old So, I end up with 2 datatables, Price_Old, and Price_New, and what I need to do is update Price_old with the new prices in Price_New, and then commit those new prices to the Database. I am kinda new to LINQ (about 30 mins of experience) and would really appreciate if someone could give me a pointer or two on whether or not this is doing in LINQ and what the best method would be. Thanks

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• How to model my database when using entity framework 4?

  - by Junior Ewing

  Trying to wrap my head around the best approach in modelling a database when we are using Entity Framework 4 as the ORM layer. We are going to use asp.net mvc 2 for the application. Is it worth trying to model using the class diagram modeller that comes with Visual Studio 2010 where you graphically configure your models into the EDMX file and then generate out the database structure? I have run into a bunch of non trivial issues and for complex many to many mappings or multi primary key entities the answer is not that obvious even after poking around a while with the tools. I figure its easy at this point to give up and start modelling the DB using real, working DB modelling tools and then try to generate out the EDMX from the database, rather than trying to do the model first approach.

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• C++ Class Inheritance architecture - preventing casting

  - by Some One

  I have a structure of base class and a couple of inherited classed. Base class should be pure virtual class, it should prevent instantiation. Inherited classes can be instantiated. Code example below: class BaseClass { public: BaseClass(void); virtual ~BaseClass(void) = 0; }; class InheritedClass : public BaseClass { public: InheritedClass1(void); ~InheritedClass1(void); }; class DifferentInheritedClass : public BaseClass { public: DifferentInheritedClass(void); ~DifferentInheritedClass(void); }; I want to prevent the following operations to happen: InheritedClass *inherited1 = new InheritedClass(); DifferentInheritedClass *inherited2 = new DifferentInheritedClass (); BaseClass *base_1 = inherited1; BaseClass *base_2 = inherited2; *base_1 = *base_2;

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• Bound a treeview control to user-defined complex type using EF 4

  - by GIbboK

  Hi, I use Asp.net, SQL 2008 and EF 4. I need display hierarchy data in a treeview control, Data is stored in a DB that use HierarchyId. Unfortunately, EF4 doesn't support HierarchyId. So in this case, I thought to have a stored procedure that deals with my hierarchy and return a result set back to EF that EF4 can turn into a collection of user-defined complex type that can then be bound directly to the treeview control. I imported a SPROC in EF 4 using Import Function and now I have a Complex DataType called: CategoryHierarchy_Result An image of my Model: Here some data from the Complex Type (in a GridView for example GridView1.DataSource = context.CategoryHierarchy(1);): My questions is: How to display my data from my Complex Type in a TreeView Control, showing a Tree structure that respect CategoryNodeString? I am a beginner an I never use TreeView before, any help or resource would be appreciated! Thanks!. Here some useful resource: http://www.robbagby.com/entity-framework/entity-framework-modeling-action-stored-procedures/

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• IntPtr arithmetics

  - by Luca

  I tried to allocate an array of structs in this way: struct T { int a; int b; } data = Marshal.AllocHGlobal(count*Marshal.SizeOf(typeof(T)); ... I'd like to access to allocated data "binding" a struct to each element in array allocated with AllocHGlobal... something like this T v; v = (T)Marshal.PtrToStructure(data+1, typeof(T)); but i don't find any convenient way... why IntPtr lack of arithmetics? How can I workaround this is a "safe" way? Someone could confirm that PtrToStructure function copy data into the struct variable? In other words, modifing the struct reflect modifications in the structure array data, or not? Definitely, I want to operate on data pointed by an IntPtr using struct, without copying data each time, avoiding unsafe code. Thank all!

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• Is it possible to nest folders in the Flash Builder bin-debug

  - by ThunderChunky_SF

  I'm trying to setup my bin-debug folder so that the structure looks like this: bin-debug assets img swf main.swf css style.css js swfobject.js index.html I've tried setting the project's output folder to: bin-debug/assets/swf which does get my main.swf where I want it, but then my other source folders get dumped into that swf folder as well. What I would really like is to tell Flash Builder to put my swf into a nested folder and to be able to specify where my build folders' output goes as well. Is this at all possible without resorting to ANT scripts?

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• Cross Theaded Calls - Many controls Heavy GUI Application after .net 1.1 2.0 upgrade- best way ??

  - by keepsmilinyaar

  I have recently upgraded a .net1.1 solution to .net2.0. AS this is a very heavy GUI appilcation with loads of controls and many multithreaded operations that update the GUI. While these operations worked seamlessly in .net1.1 it is throwing up Cross Threaded Illegal operations after the upgrade. Considering the fact that tehre are numerous grids, buttons and status labels that need to be updated via these multi threaded operations, I decided to code for checking the InvokeRequired solution, however doing that for every control would probably not be the best way to go about it. I was wondering if you could suggest a better way of how I can go about it or propose any OOPS based class structure that I could code around to make the code look better. Please do let me know if my question is unclear. Thanks in advance

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• Parsing a dynamic value with Lift-JSON

  - by Surya Suravarapu

  Let me explain this question with an example. If I have a JSON like the following: {"person1":{"name": "Name One", "address": {"street": "Some Street","city": "Some City"}}, "person2":{"name": "Name Two", "address": {"street": "Some Other Street","city": "Some Other City"}}} [There is no restriction on the number of persons, the input JSON can have many more persons] I could extract this JSON to Persons object by doing var persons = parse(res).extract[T] Here are the related case classes: case class Address(street: String, city: String) case class Person(name: String, address: Address, children: List[Child]) case class Persons(person1: Person, person2: Person) Question: The above scenario works perfectly fine. However the need is that the keys are dynamic in the key/value pairs. So in the example JSON provided, person1 and person2 could be anything, I need to read them dynamically. What's the best possible structure for Persons class to account for that dynamic nature.

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• Code Igniter - URL Rewrite

  - by André Alçada Padez

  Hey, i'm trying to get a project to work, but i am having trouble with the rewrite module. I'm running Wamp over Windows XP. I changed httpd.conf to change the root of localhost to: DocumentRoot "C:/wamp/www/project/docroot/" I have htaccess RewriteEngine On RewriteBase / my Apache has the rewrite module Activated. my base_url() in config.php is 'http://localhost/' in routes.php i have: $route['default_controller'] = "home"; $route['our-recipes'] = "recipes"; and more pairs when i point the browser to http://localhost/ i get the homepage of my site, but when i click on any internal link like to 'our-recipes' it loads but i get the same homepage, with the new url on the location bar. if i try to access 'http://localhost/recipes' i get the same result. this is my folder structure: Can anyone please solve this for me??

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• How many instructions to access pointer in C?

  - by Derek

  Hi All, I am trying to figure out how many clock cycles or total instructions it takes to access a pointer in C. I dont think I know how to figure out for example, p-x = d-a + f-b i would assume two loads per pointer, just guessing that there would be a load for the pointer, and a load for the value. So in this operations, the pointer resolution would be a much larger factor than the actual addition, as far as trying to speed this code up, right? This may depend on the compiler and architecture implemented, but am I on the right track? I have seen some code where each value used in say, 3 additions, came from a f2->sum = p1->p2->p3->x + p1->p2->p3->a + p1->p2->p3->m type of structure, and I am trying to define how bad this is

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• What does 'unsigned temp:3' means

  - by Munir Ahmed

  Hi, I'm trying to map a C structure to Java using JNA. I came across something that I've never seen. The struct definition is as follow, struct op { unsigned op_type:9; //---> what does this means? unsigned op_opt:1; unsigned op_latefree:1; unsigned op_latefreed:1; unsigned op_attached:1; unsigned op_spare:3; U8 op_flags; U8 op_private; }; you can see some variable being defined like unsigned op_attached:1 and I'm unsure what would that mean: would that effect number of bytes to be allocated for this particular variable? any help? Thanks, Munir

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• Python / Django : emulating a multidimensionnal layer on a mySql database

  - by Sébastien Piquemal

  Hi, I'm working on a Django project where I need to provide a lot of different visualizations on the same data (for example average of a value for each month, for each year / for a location, etc ...). I have been using OLAP database once in college, and I thought that it would fit my needs, but it appears that it is much to heavy for what I need. Actually the volume of data is not very big, so I don't need any optimization, just a way to present different visualizations of the same data without having to write 1000 times the same code. So let's recap : I need a python library : to emulate a multidimensional database (OLAP style would be nice because I think it is quite convenient : stat structure, and everything) non-intrusive, because I can't modify anything on the existing mysql database easy-to-use, because otherwise there's no point in replacing some overhead by another.

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• mysql query - syntax error - cannot find out why

  - by Phil Jackson

  Hi all, im taring my hair out over this one. A query is throwing an error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'FROM, SUBJECT, DATE, READ, MAIL ) VALUES ( 'EJackson', 'dfdf', '1270974101', 'fa' at line 1 I printed out the query to see what could be the problem: INSERT INTO db.tablename ( FROM, SUBJECT, DATE, READ, MAIL ) VALUES ( 'EJackson', 'dfdf', '1270974299', 'false', 'dfdsfdsfd' ) and finaly the structure consists of: CREATE TABLE db.tablename ( `ID` int(12) NOT NULL auto_increment, `FROM` varchar(255) NOT NULL, `SUBJECT` varchar(255) NOT NULL, `DATE` varchar(255) NOT NULL, `READ` varchar(255) NOT NULL, `MAIL` varchar(255) NOT NULL, PRIMARY KEY (`ID`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ; I cant find anything wrong. Any Help would be much appreciated. ( db.tablename is a replacement for the actual tablename )

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• FileSystemWatcher keeping parent directory

  - by Henry Jackson

  I am using FileSystemWatcher to monitor a folder, and it seems to be preventing the folder's parent from being deleted. For example, I have the file structure: C:\Root\FolderToWatch\... with the FileSystemWatcher targeting FolderToWatch. While my program is running, if I go to Windows Explorer and try to delete Root, I get an error "Cannot delete Root: access is denied". However, if I delete FolderToWatch FIRST, I can then delete Root without incident. (Needless to say, if the FileSystemWatcher is not enabled, I have no problem deleting either folder.) What gives? Why does the FileSystemWatcher hang onto it's target's parent like that? How (if possible) can I stop this behavior? I would like the user to be able to freely move or delete directories in Windows Explorer.

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• jQuery draggable leaving cloned html behind

  - by Alex Crooks

  I am using jQuery UI; Draggable http://jqueryui.com/demos/draggable invoked like this: $(document).ready(function(){ $("#side_bar").sortable({ revert: true }); $(".draggable").draggable({ containment: 'parent', hascroll: true, handle: 'div.box_header', scrollSensitivity: 100, scrollSpeed: 100, axis: 'y', connectToSortable: '#side_bar', helper: 'clone', opacity: 0.35 }); }); You can see the html structure on http://www.sarsclan.co.uk (right side bar area). It seems to create a transparant clone as your dragging, but when you drop it puts the draggable div in the right place, but leaves the original div in it's place and just appends the dom with a clone of that original div in its new place.

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