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• How do I programmatically insert rows into a Silverlight DataGrid without binding?

  - by j0rd4n

  I am using a common Silverlight DataGrid to display results from a search. The "schema" of the search can vary from query to query. To accommodate this, I am trying to dynamically populate the DataGrid. I can set explicitly set the columns, but I am having trouble setting the ItemSource. All of the MSDN examples set the ItemSource to a collection with a strong type (e.g. a Custom type with public properties matching the schema). The DataGrid then uses reflection to scour the strong type for public properties that will match the columns. Since my search results are dynamic, I cannot create a strong type to represent what comes back. Can I not just give the DataGrid an arbitrary list of objects so long as the number of objects in each list matches the number of columns? Anyone know if this is possible? I would like to do something similar to this: List<List<object>> myResults = <voodoo that populates the result list> myDataGrid.ItemsSource = myResults;

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• ORACLE: can we create global temp tables or any tables in stored proc?

  - by mrp

  Hi, below is the stored proc I wrote: create or replace procedure test005 as begin CREATE GLOBAL TEMPORARY TABLE TEMP_TRAN ( COL1 NUMBER(9), COL2 VARCHAR2(30), COL3 DATE ) ON COMMIT PRESERVE ROWS / INSERT INTO TEMP_TRAN VALUES(1,'D',sysdate); INSERT INTO TEMP_TRAN VALUES(2,'I',sysdate); INSERT INTO TEMP_TRAN VALUES(3,'s',sysdate); COMMIT; end; when i executed it , i get an error message mentioning: create or replace procedure test005 as begin CREATE GLOBAL TEMPORARY TABLE TEMP_TRAN ( COL1 NUMBER(9), COL2 VARCHAR2(30), COL3 DATE ) ON COMMIT PRESERVE ROWS / INSERT INTO TEMP_TRAN VALUES(1,'D',sysdate); INSERT INTO TEMP_TRAN VALUES(2,'I',sysdate); INSERT INTO TEMP_TRAN VALUES(3,'s',sysdate); COMMIT; end; Error at line 1 ORA-00955: name is already used by an existing object Script Terminated on line 1. I tried to drop the TEMP_TRAN and it says table doesn't exist. So there is no TEMP_TRAN table existed in system. why am I getting this error? I am using TOAD to create this stored proc. Any help would be highly appreciated.

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• What do you do when you need whole-words search in Firefox?

  - by romkyns

  Example: I am looking to see if "arg" is a special keyword in Lua. I go to the Lua reference manual at http://www.lua.org/manual/5.1/manual.html. I search for "arg". I find hundreds of occurrences of the word "argument(s)" or "vararg". Any ideas? I know Firefox won't implement whole words as a core feature (something about cluttering up the ui... argh...), and I couldn't find a good addon that implemented this well.

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• merging javascript arrays for json

  - by Nat

  I serially collect information from forms into arrays like so: list = {"name" : "John", "email" : "[email protected]", "country" : "Canada", "color" : "blue"}; identifier = "first_round"; list = {"name" : "Harry", "email" : "[email protected]", "country" : "Germany"}; identifier = "second_round"; I want to combine them into something (I may have braces where I need brackets) like: list_all = { "first_round" : {"name" : "John", "email" : "[email protected]", "country" : "Canada", "color" : "blue"} , "second_round" : {"name" : "Harry", "email" : "[email protected]", "country" : "Germany"} }; so I can access them like: alert(list_all.first_round.name) -> John (Note: the name-values ("name", "email", "color") in the two list-arrays are not quite the same, the number of items in each list-array is limited but not known in advance; I need to serially add only one array to the previous structure each round and there may be any number of rounds, i.e. "third-round" : {...}, "fourth-round" : {...} and so on.) Ultimately, I'd like it to be well-parsed for JSON. I use the jquery library, if that helps.

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• How to Declare Complex Nested C# Type for Web Service

  - by TheArtTrooper

  I would like to create a service that accepts a complex nested type. In a sample asmx file I created: [WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. // [System.Web.Script.Services.ScriptService] public class ServiceNest : System.Web.Services.WebService { public class Block { [XmlElement(IsNullable = false)] public int number; } public class Cell { [XmlElement(IsNullable = false)] public Block block; } public class Head { [XmlElement(IsNullable = false)] public Cell cell; } public class Nest { public Head head; } [WebMethod] public void TakeNest(Nest nest) { } } When I view the asmx file in IE the test page shows the example SOAP post request as: <?xml version="1.0" encoding="utf-8"?> <soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"> <soap:Body> <TakeNest xmlns="http://schemas.intellicorp.com/livecompare/"> <nest> <head> <cell> <block xsi:nil="true" /> </cell> </head> </nest> </TakeNest> </soap:Body> </soap:Envelope> It hasn't expanded the <block> into its number member. Looking at the WSDL, the types all look good. So is this just a limitation of the post demo page creator? Thanks.

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• Refresher on Java classes in separate files

  - by JohnFaig

  I need a refresher on moving classes from one file into two files. My sample code is in one file called "external_class_file_main". The program runs fine and the code is shown below: Public class external_class_file_main { public static int get_a_random_number (int min, int max) { int n; n = (int)(Math.random() * (max - min +1)) + min; return (n); } public static void main(String[] args) { int r; System.out.println("Program starting..."); r = get_a_random_number (1, 5); System.out.println("random number = " + r); System.out.println("Program ending..."); } } I move the get_a_random_number class to a separate file called "external_class_file". When I do this, I get the following error: Exception in thread "main" java.lang.Error: Unresolved compilation problem: The method get_a_random_number(int, int) is undefined for the type external_class_file_main at external_class_file_main.main(external_class_file_main.java:20) The "external_class_file_main" now contains: public class external_class_file_main { public static void main(String[] args) { int r; System.out.println("Program starting..."); r = get_a_random_number (1, 5); System.out.println("random number = " + r); System.out.println("Program ending..."); } } The "external_class_file" now contains: public class external_class_file { public static int get_a_random_number (int min, int max) { int n; n = (int)(Math.random() * (max - min +1)) + min; return (n); } }

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• How can I increment a counter every N loops in JMeter?

  - by Dave Hunt

  I want to test concurrency, and reliably replicate an issue that JMeter brought to my attention. What I want to do is set a unique identifier (currently the time in milliseconds with a counter appended) and increment the counter between loops but not between threads. The idea being that the number of threads I have set up is the number of identical identifiers before incrementing and using another. If I had 3 threads with a loop count of 2 I want: 1. Unique ID: <current-time-in-millis>000000 2. Unique ID: <current-time-in-millis>000000 3. Unique ID: <current-time-in-millis>000000 4. Unique ID: <current-time-in-millis>000001 5. Unique ID: <current-time-in-millis>000001 6. Unique ID: <current-time-in-millis>000001 I've tried using Throughput Controllers to increment a counter, as well as several other things that seemed they should work but had no luck. This seems like something JMeter should be able to do. Is there any way to get the value of the loop count?

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• How to share malicious source code?

  - by darma

  I have a client whose site (not one i developed) is infected by a trojan/malicious code. I have asked him to send me the dirty files in a zip but either gmail or unzipping is blocking them. I've tried text files and word files, and i'm suspecting many different file types will be blocked the same way, either by my mail client, anti-malware software, browser etc. (which is normal). Do you know a way he could share those lines so i can read them and do some research about the malicious source code? An image/screenshot of his text editor would be an idea but the files are long + i'd prefer to be able to copy/paste from them. Thank you!

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• Is there a way to insert a formatted calculation into Excel 2010 without using an image?

  - by Ryan Taylor

  I am maintaining a list of database column names, notes, and their calculations in an Excel 2010 spreadsheet. The calculations are included so as to document how to derive the values for the various columns and not for calculations within the spreadsheet. I have been entering the calculations into the cells simply as unformatted text like so: 100 - ((FiscalYearRegionConsumption - BaselineRegionConsumption) / (GoalRegionConsumption - BaselineRegionConsumption)) * 100 However, for long and/or complex calculations this could become rather unreadable. To improve readability and comprehension I would like to "pretty" print the calculation in an Excel cell. This would result in formatting that would like like this: The only solution I have come up with is to: Write the calculation in another application such as Word Take a screenshot of said calculation Past the screenshot into Excel The primary concern with this approach is maintenance. Should the calculation change or need correction I have to update two different sources of information. Is there a better way included a formatted calculation into an Excel cell?

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• The mathematics of Schellings segregation model

  - by Bruce

  For those who don't know the model. You can read this pdf. I want to find what is the probability that 2 nodes are each others neighbors when the algorithm converges (i.e. when all nodes are happy). Here's the model in a gist. You have a grid (say 10x10). You have nodes of two kind (red and green) 45 each. So we have 10 empty spaces. We randomly place the nodes on the grid. Now we scan through this grid (Exact order does not matter according to Schelling). Each node wants a specific percentage of people of same kind in its Moore neighborhood (say b = 50% for each red and green). We calculate the happiness of each node (a = Number of neighbors of same kind/Number of neighbors of different kind). If a node is unhappy (a < b) it moves to an empty cell where it knows it will be happy. This movement can change the dynamics of old as well as new neighborhood. Algorithm converges when all nodes are happy. PS - I am looking for links for any mathematical analysis of the Schelling's model.

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• Common Lisp condition system for transfer of control

  - by Ken

  I'll admit right up front that the following is a pretty terrible description of what I want to do. Apologies in advance. Please ask questions to help me explain. :-) I've written ETLs in other languages that consist of individual operations that look something like: // in class CountOperation IEnumerable<Row> Execute(IEnumerable<Row> rows) { var count = 0; foreach (var row in rows) { row["record number"] = count++; yield return row; } } Then you string a number of these operations together, and call The Dispatcher, which is responsible for calling Operations and pushing data between them. I'm trying to do something similar in Common Lisp, and I want to use the same basic structure, i.e., each operation is defined like a normal function that inputs a list and outputs a list, but lazily. I can define-condition a condition (have-value) to use for yield-like behavior, and I can run it in a single loop, and it works great. I'm defining the operations the same way, looping through the inputs: (defun count-records (rows) (loop for count from 0 for row in rows do (signal 'have-value :value `(:count ,count @,row)))) The trouble is if I want to string together several operations, and run them. My first attempt at writing a dispatcher for these looks something like: (let ((next-op ...)) ;; pick an op from the set of all ops (loop (handler-bind ((have-value (...))) ;; records output from operation (setq next-op ...) ;; pick a new next-op (call next-op))) But restarts have only dynamic extent: each operation will have the same restart names. The restart isn't a Lisp object I can store, to store the state of a function: it's something you call by name (symbol) inside the handler block, not a continuation you can store for later use. Is it possible to do something like I want here? Or am I better off just making each operation function explicitly look at its input queue, and explicitly place values on the output queue?

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• Factorial in Prolog and C++

  - by Joshua Green

  I would like to work out a number's factorial. My factorial rule is in a Prolog file and I am connecting it to a C++ code. Can someone tell me what is wrong with my C++ interface please? % factorial.pl factorial( 1, 1 ):- !. factorial( X, Fac ):- X > 1, Y is X - 1, factorial( Y, New_Fac ), Fac is X * New_Fac. // factorial.cpp # headerfiles term_t t1; term_t t2; term_t goal_term; functor_t goal_functor; int main( int argc, char** argv ) { argc = 4; argv[0] = "libpl.dll"; argv[1] = "-G32m"; argv[2] = "-L32m"; argv[3] = "-T32m"; PL_initialise(argc, argv); if ( !PL_initialise(argc, argv) ) PL_halt(1); PlCall( "consult(swi('plwin.rc'))" ); PlCall( "consult('factorial.pl')" ); cout << "Enter your factorial number: "; long n; cin >> n; PL_put_integer( t1, n ); t1 = PL_new_term_ref(); t2 = PL_new_term_ref(); goal_term = PL_new_term_ref(); goal_functor = PL_new_functor( PL_new_atom("factorial"), 2 ); PL_put_atom( t1, t2 ); PL_cons_functor( goal_term, goal_functor, t1, t2 ); PL_halt( PL_toplevel() ? 0 : 1 ); }

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• Storing float numbers as strings in android database

  - by sandis

  So I have an app where I put arbitrary strings in a database and later extract them like this: Cursor DBresult = myDatabase.query(false, Constant.DATABASE_NOTES_TABLE_NAME, new String[] {"myStuff"}, where, null, null, null, null, null); DBresult.getString(0); This works fine in all cases except for when the string looks like a float number, for example "221.123123123". After saving it to the database I can extract the database to my computer and look inside it with a DB-viewer, and the saved number is correct. However, when using cursor.getString() the string "221.123" is returned. I cant for the life of me understand how I can prevent this. I guess I could do a cursor.getDouble() on every single string to see if this gives a better result, but that feels sooo ugly and inefficient. Any suggestions? Cheers, edit: I just made a small test program. This program prints "result: 123.123", when I would like it to print "result: 123.123123123" SQLiteDatabase database = openOrCreateDatabase("databas", Context.MODE_PRIVATE, null); database.execSQL("create table if not exists tabell (nyckel string primary key);"); ContentValues value = new ContentValues(); value.put("nyckel", "123.123123123"); database.insert("tabell", null, value); Cursor result = database.query("tabell", new String[]{"nyckel"}, null, null, null, null, null); result.moveToFirst(); Log.d("TAG","result: " + result.getString(0));

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• Drawing an honeycomb with as3

  - by vitto

  Hi, I'm trying to create an honeycomb with as3 but I have some problem on cells positioning. I've already created the cells (not with code) and for cycled them to a funcion and send to it the parameters which what I thought was need (the honeycomb cell is allready on a sprite container in the center of the stage). to see the structure of the cycle and which parameters passes, please see the example below, the only thing i calculate in placeCell is the angle which I should obtain directly inside tha called function Note: the angle is reversed but it isn't important, and the color are useful in example only for visually divide cases. My for cycle calls placeCell and passes cell, current_case, counter (index) and the honeycomb cell_lv (cell level). I thought it was what i needed but I'm not skilled in geometry and trigonometry, so I don't know how to position cells correctly: function placeCell (cell:Sprite, current_case:int, counter:int, cell_lv:int):void { var margin:int = 2; var angle:Number = (360 / (cell_lv * 6)) * (current_case + counter); var radius:Number = (cell.width + margin) * cell_lv; cell.x = radius * Math.cos (angle); cell.y = radius * Math.sin (angle); trace ("LV " + cell_lv + " current_case " + current_case + " counter " + counter + " angle " + angle + " radius " + radius) } how can I do to solve it?

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• RichFaces a4j:support parameter passing

  - by Mark Lewis

  Hello I have a number of rich:inplaceInput tags in RichFaces which represent numbers in an array. The validator allows integers only. When a user clicks in an input and changes a value, how can I get the bean to sort the array given the new number and reRender the list of rich:inplaceInput tags so that they're in numerical order? EG <a4j:region> <rich:dataTable value="#{MyBacking.config}" var="feed" cellpadding="0" cellspacing="0" width="100%" border="0" columns="5" id="Admin"> ... <a4j:repeat... <a4j:region id="MsgCon"> <rich:inplaceInput value="#{h.id}" validator="#{MyBacking.validateID}" id="andID" showControls="true"> <a4j:support event="onviewactivated" action="#{MyBacking.sort}" reRender="Admin" /> </rich:inplaceInput> </a4j:region> </a4j:repeat> </data:Table> </a4j:region> Note I do NOT want to use dataTable sort functions. The table is complicated and I've specified id="Admin" (ie the whole table) to reRender as I've not found a way to send more localised values to the backing bean through the inplaceInput. This question is about how to use a4j:support action attribute to call the sort method so that when the reRender rerenders the component, it outputs the list in sorted order. I have the sort method working ok when I click a button to sort, but I want to have the list sorted automatically as soon as a new valid value is entered into the inplaceInput component. Thanks

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• Any diff/merge tool that provides a report (metrics) of conflicts?

  - by cad

  CONTEXT: I am preparing a big C# merge using visual studio 2008 and TFS. I need to create a report with the files and the number of collisions (total changes and conflicts) for each file (and in total of course) PROBLEM: I cannot do it for two reasons (first one is solved): 1- Using TFS merge I can have access to the file comparison but I cannot export the list of conflicting files... I can only try to resolve the conflicts. (I have solved problem 1 using beyond compare. It allows me to export the file list) 2- Using TFS merge I can only access manually for each file to get the number of conflicts... but I have more than 800 files (and probably will have to repeat it in the close future so is not an option doing it manually) There are dozens of file comparison tools (http://en.wikipedia.org/wiki/Comparison_of_file_comparison_tools ) but I am not sure which one could (if any) give me these metrics. I have also read several forums and questions here but are more general questions (which diff tool is better) and I am looking for a very specific report. So my questions are: Is Visual Studio 2010 (using still TFS2008) capable of doing such reports/exportation? Is there any tool that provide this kind of metrics (Now I am trying Beyond Compare)

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• Connecting an overloaded PyQT signal using new-style syntax

  - by Claudio

  I am designing a custom widget which is basically a QGroupBox holding a configurable number of QCheckBox buttons, where each one of them should control a particular bit in a bitmask represented by a QBitArray. In order to do that, I added the QCheckBox instances to a QButtonGroup, with each button given an integer ID: def populate(self, num_bits, parent = None): """ Adds check boxes to the GroupBox according to the bitmask size """ self.bitArray.resize(num_bits) layout = QHBoxLayout() for i in range(num_bits): cb = QCheckBox() cb.setText(QString.number(i)) self.buttonGroup.addButton(cb, i) layout.addWidget(cb) self.setLayout(layout) Then, each time a user would click on a checkbox contained in self.buttonGroup, I'd like self.bitArray to be notified so I can set/unset the corresponding bit in the array. For that I intended to connect QButtonGroup's buttonClicked(int) signal to QBitArray's toggleBit(int) method and, to be as pythonic as possible, I wanted to use new-style signals syntax, so I tried this: self.buttonGroup.buttonClicked.connect(self.bitArray.toggleBit) The problem is that buttonClicked is an overloaded signal, so there is also the buttonClicked(QAbstractButton*) signature. In fact, when the program is executing I get this error when I click a check box: The debugged program raised the exception unhandled TypeError "QBitArray.toggleBit(int): argument 1 has unexpected type 'QCheckBox'" which clearly shows the toggleBit method received the buttonClicked(QAbstractButton*) signal instead of the buttonClicked(int) one. So, the question is, how can we specify, using new-style syntax, that self.buttonGroup emits the buttonClicked(int) signal instead of the default overload - buttonClicked(QAbstractButton*)?

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• while loop in c#

  - by Nave Tseva

  I have this code: using System; namespace _121119_zionAVGfilter { class Program { static void Main(string[] args) { int cnt = 0, zion, sum = 0; double avg; Console.Write("Enter first zion \n"); zion = int.Parse(Console.ReadLine()); while (zion != -1) { while (zion < -1 || zion > 100) { Console.Write("zion can be between 0 to 100 only! \nyou can rewrite the zion here, or Press -1 to see the avg\n"); zion = int.Parse(Console.ReadLine()); } cnt++; sum = sum + zion; Console.Write("Enter next zion, if you want to exit tap -1 \n"); zion = int.Parse(Console.ReadLine()); if (cnt != 0){} } if (cnt == 0) { Console.WriteLine("something doesn't make sence"); } else { avg = (double)sum / cnt; Console.Write("the AVG is {0}", avg); } Console.ReadLine(); } } } The problem here is that if in the beginning I enter a negative or bigger than hundred number, I will get this message: "zion can be between 0 to 100 only! \nyou can rewrite the zion here, or Press -1 to see the avg\n". If I then meenter -1, this what that shows up instead of the AVG: "Enter next zion, if you want to exit tap -1 \n." How can I solve this problem so when the number is negative or bigger than hundred and than tap -1 I will see the AVG an not another message?

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• How do I compare two Excel documents?

  - by arathorn

  The compare function in Word 2007 is very handy -- is there a similar capability in Excel 2007? I can't seem to find it... The documents I'm trying to compare are essentially two versions of the same content. Unfortunately, "Track Changes" has not been used. If file comparison not a built-in feature, what alternatives are out there for doing this? UPDATE [2009-08-05]: I ran across this (somewhat dated) overview of some of the third-party options that are available: http://www.comparesuite.com/solutions/compare_utilities_review/compare-files-excel.htm UPDATE [2009-08-12]: I ended up going with the Beyond Compare answer, but several of the other answers below were adequate as well, and might be more useful for someone else. (E.g., if you don't own a license for BeyondCompare, or want a comparison GUI that's integrated into Excel.) See also: How do I diff two spreadsheets on Stack Overflow

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• Software for printing small photos on larger paper with easy layout snapping

  - by ldigas

  Have some photos and pictures to print (graphs, but that doesn't matter here). So far when printing I inserted them in MS Word, played with layout on the paper, and after half a day, finally managed to get it just right. Usually then, the power runs out :-) Anyways, does anyone know of any software which enables me to easily put up some kind of a layout (one under the other, or some rectangular grid) where I can just "snap" photos next to each other, before printing the whole thing. I know I can do that in pretty much any photo editing program, but the problem is that that pixel hunting takes time ... and is generally a very annoying process, expecially when you don't want to edit the photos in mind, just print them out. Anyways, I'm sure you get the general idea ... Suggestions ?

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• jQuery accordion link issue

  - by Josh

  Slight problem, I've been working with a multi-accordion for a News panel. Everything is working fine, but there is an issue that has just recently come up. Underneath the headline I have information on when said headline+article was posted and when, and also if there are any comments. I intended to make the author and the number of comments as a link. The author link would most likely bring them to their contact page or maybe an email, the number of comments link would just expand it directly to the "View comments" which the user could also access by just expanding the article and then expanding the comments. A shortcut basically. Now, the issue is that I'm having to put this "Posted by..." information inside the a class which allows the user to expand the headline into the article. If I do this however, it breaks the entire accordion field for that headline because there are multiple A HREF links inside the original A link. I really don't know how to get around this, if anyone has a tip or a solution I would most appreciate it, thanks. You can view the demo here: http://www.notedls.com/demo

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• Deeply nested subqueries for traversing trees in MySQL

  - by nickf

  I have a table in my database where I store a tree structure using the hybrid Nested Set (MPTT) model (the one which has lft and rght values) and the Adjacency List model (storing parent_id on each node). my_table (id, parent_id, lft, rght, alias) This question doesn't relate to any of the MPTT aspects of the tree but I thought I'd leave it in in case anyone had a good idea about how to leverage that. I want to convert a path of aliases to a specific node. For example: "users.admins.nickf" would find the node with alias "nickf" which is a child of one with alias "admins" which is a child of "users" which is at the root. There is a unique index on (parent_id, alias). I started out by writing the function so it would split the path to its parts, then query the database one by one: SELECT `id` FROM `my_table` WHERE `parent_id` IS NULL AND `alias` = 'users';-- 1 SELECT `id` FROM `my_table` WHERE `parent_id` = 1 AND `alias` = 'admins'; -- 8 SELECT `id` FROM `my_table` WHERE `parent_id` = 8 AND `alias` = 'nickf'; -- 37 But then I realised I could do it with a single query, using a variable amount of nesting: SELECT `id` FROM `my_table` WHERE `parent_id` = ( SELECT `id` FROM `my_table` WHERE `parent_id` = ( SELECT `id` FROM `my_table` WHERE `parent_id` IS NULL AND `alias` = 'users' ) AND `alias` = 'admins' ) AND `alias` = 'nickf'; Since the number of sub-queries is dependent on the number of steps in the path, am I going to run into issues with having too many subqueries? (If there even is such a thing) Are there any better/smarter ways to perform this query?

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• [Database] How to model this one-to-one relation?

  - by pbean

  I have several entities which respresent different types of users who need to be able to log in to a particular system. Additionally, they have different types of information associated with them. For example: a "general user", which has an e-mail address and "admin user", which has a workstation number (note that this a hypothetical case). Both entities also share common properties like first name, surname, address and telephone number. Finally, they naturally need to have a (unique) user name and a password to log in. In the application, the user just has to fill in his user name and password, and the functionality of the application changes slightly according to the type of the user. You can imagine that the username needs to be unique for this work. How should I model this effectively? I can't just create two tables, because then I can't force a unique constaint on the user name. I also can't put them all in just one table, because they have different types of specific information associated to them. I think I might need 3 seperate tables, one for "users" (with user name and password), one for the "general users" and another one for the "admin users", but how would the relations between these work? Or is there another solution? (By the way, the target DBMS is MySQL, so I don't think generalization is supported in the database system itself).

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• KODO: how set up fetch plan for bidirectional relationships?

  - by BestPractices

  Running KODO 4.2 and having an issue inefficient queries being generated by KODO. This happens when fetching an object that contains a collection where that collection has a bidrectional relationship back to the first object. Class Classroom { List<Student> _students; } Class Student { Classroom _classroom; } If we create a fetch plan to get a list of Classrooms and their corresponding Students by setting up the following fetch plan: fetchPlan.addField(Classroom.class,”_students”); This will result in two queries (get the classrooms and then get all students that are in those classrooms), which is what we would expect. However, if we include the reference back to the classroom in our fetch plan in order for the _classroom field to get populated by doing fetchPlan.addField(Student.class, “_classroom”), this will result in X number of additional queries where X is the number of students in each classroom. Can anyone explain how to fix this? KODO already has the original Classroom objects at the point that it's executing the queries to retrieve the Classroom objects and set them in each Student object's _classroom field. So I would expect KODO to simply set those objects in the _classroom field on each Student object accordingly and not go back to the database. Once again, the documentation is sorely lacking with Kodo/JDO/OpenJPA but from what I've read it should be able to do this more efficiently. Note-- EAGER_FETCH.PARALLEL is turned on and I have tried this with caching (query and data caches) turned on and off and there is no difference in the resultant queries.

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• Multiple IntenseDebate Comment Counts

  - by Aristotle

  I just setup IntenseDebate on my blog this evening and am, for the most part, pleased with it. One thing I did see is that they offered me a small snippet to show the current number of comments: <script> var idcomments_acct = 'abcdefgef12345678mykey8675309acdc'; var idcomments_post_id; var idcomments_post_url; </script> <script type="text/javascript" src="http://www.intensedebate.com/js/genericLinkWrapperV2.js"></script> This is nice, but what I would like to do is have something similar on my archives page where many posts are listed - not just one. Presently the page looks like this: Some Post TitleAuthor NameShort abstract from this post... Some Post TitleAuthor NameShort abstract from this post... I would like it to look like this: Some Post TitleAuthor NameShort abstract from this post...7 Comments Some Post TitleAuthor NameShort abstract from this post...3 Comments But I'm not exactly sure how I can do this with IntenseDebate. Do they offer any sort of method to gather the total number of comments for multiple pages from a single page?

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