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• Using Accelerometer in Wiimote for Physics Practicals

  - by Omar

  I have to develop some software in my school to utilize the accelerometer in the Wiimote for recording data from experiments, for example finding the acceleration and velocity of a moving object. I understand how the accelerometer values will be used but I am sort of stuck on the programming front. There is a set of things that I would like to do: Live streaming of data from the Wiimote via bluetooth Use the accelerometer values to find velocity and displacment via integration Plot a set of results Avoid the use of the infrared sensor on the Wiimote Please can anyone give me their thoughts on how to go about this. Also it would be great if people could direct me to existing projects that utizlise the wiimote. Also can someone suggest what would be the best programming language to use for this. My current bet is on using Visual basic. Any sort of help is greatly appretiated.

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• Django admin interface upload failing on request data read error

  - by Jake

  Hi All, This is an updated version of an old question I asked. I've now done a lot more testing, plus the old question got hijacked. I'm getting a request data read error when trying to upload files to the Django admin interface. Files under about 150k work, but bigger files always fail and almost always at around 192k (that's 3 chunks) completed, sometimes at around 160k. The Exception I get is below. File "/usr/lib/python2.4/site-packages/django/http/multipartparser.py", line 405, in read return self._file.read(num_bytes) IOError: request data read error I've tried Chrome and Firefox on Windows and Firefox on Mac - Same results. I can upload to other sites so I don't think it's my connection. I'm running python 2.4, django 1.1, mod_wsgi, on CentOS (a media temple DV server) Locally it's fine (Django development server) Everything I've found on this issue says it's a mod_python issue and that changing to mod_wsgi will fix it, but I am running mod_wsgi. Can anyone help?

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• Drawing a continuous rectangle

  - by JAYMIN

  Hi..i m currently working on visual c++ 2008 express edition.. in my project i have a picturebox which contains an image, now i have to draw a rectangle to enaable the user to select a part of the image.. I have used the "MouseDown" event of the picturebox and the below code to draw a rectangle: Void pictureBox1_MouseDown(System::Object^ sender, Windows::Forms::MouseEventArgs^ e) { Graphics^ g = pictureBox1-CreateGraphics(); Pen^ pen = gcnew Pen(Color::Blue); g-DrawRectangle( pen , e-X ,e-Y,width,ht); } now in the "DrawRectangle" the arguments "width" and "ht" are static, so the above code results in the drawing of a rectangle at the point where the user presses the mouse button on the image in picturebox... i want to allow the user to be able to drag the cursor and draw a rectangle of size that he wishes to.. Plz help me on this.. Thanx..

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• Extract all text from a HTML page without losing context

  - by grmbl

  For a translation program I am trying to get a 95% accurate text from a HTML file in order to translate the sentences and links. For example: <div><a href="stack">Overflow</a> <span>Texts <b>go</b> here</span></div> Should give me 2 results to translate: Overflow Texts <b>go</b> here Any suggestions or commercial packages available for this problem?

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• CFGRID - replace data store or filter on more than one column

  - by Casuzen

  ColdFusion 8 I have a cfgrid that that is based on a query. It is not bound to a cfc function because I want a scrolling grid, not a paged grid (you must supply the page number and page size if you use BIND).. I can figure out how to make it filter on one column by using the following code, but I really need to filter on three columns... grid.getDataSource().filter("OT_MILESTONE",t1); Adding more to the filter string does not do the trick...it ignores anything more than the first pair of values.. so..I thought if I called a function that passes the three values and returned the query results to me, I could replace the Data Store for the grid..but I cannot figure out the syntax to get it to replace. The returned variable for the query has the following format: {"COLUMNS":["SEQ_KEY","ID","OT_MILESTONE"],"DATA":[[63677,"x","y"]]} Any ideas?

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• what's faster: merging lists or dicts in python?

  - by tipu

  I'm working with an app that is cpu-bound more than memory bound, and I'm trying to merge two things whether they be sets or dicts. Now the thing is i can choose either one, but I'm wondering if merging dicts would be faster since it's all in memory? Or is it always going to be O(n), n being the size of the smaller set. The reason I asked about dicts rather than sets is because I can't convert a set to json, because that results in {key1, key2, key3} and json needs a key/value pair, so I am using a dict so json dumps returns {key1:1, key2:1, key3:1}. Yes this is wasteful, but if it proves to be faster then I'm okay with it.

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• How to define a query om a n-m table

  - by user559889

  Hi, I have some troubles defining a query. I have a Product and a Category table. A product can belong to multiple categories and vice versa so there is also a Product-Category table. Now I want to select all products that belong to a certain category. But if the user does not provide a category I want all products. I try to create a query using a join but this results in the product being selected multiple times if it belongs to multiple categories (in the case no specific category is queried). What kind of query do I have to create? Thanks

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• jQuery UI AutoComplete remote json response question

  - by Greg-J

  I was using geonames.org to autocomplete city and state but found it to be far too slow to be reliable. My code is as follows, and does work (wait about 10 seconds to see the autocomplete results) Old (working) code here: http://jsbin.com/umewo3/2/edit Now I am using YQL as they provide a much quicker response. The issue is that I don't seem to understand how to properly map the response. You can see I am sending a well formed request, and getting the response back - but I am somehow not dealing with the response properly. New (broken) code here: http://jsbin.com/aqoke3/2/edit Any and all help appreciated.

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• Binding output of Custom Activity designer to activity argument

  - by gbanfill

  I am trying to add a custom activity designer for an activity that I have. The activity looks a little like: public class WaitForUserInputActvitiy : NativeActivity { public InArgument<UserInteractionProperty[]> UserInteraction { get; set; } } I am trying to put a designer on the activity to make it a bit nicer to set these values (so you don't end up typing VB in directly. My designer is based on mindscape property grid. I have an ObservableDictionary source that I want to get the values from and put them in to the InArgument. Currently I am using private void TestGrid_LostFocus(object sender, RoutedEventArgs e) { using (ModelEditingScope editingScope = this.ModelItem.BeginEdit()) { Argument myArg = Argument.Create(typeof(WaitForUserInputActvitiy), ArgumentDirection.In); this.ModelItem.Properties["UserInteraction"].SetValue(source.Values.ToArray()); editingScope.Complete(); } } However this results in an ArgumentException "Object of type UserInteractionProperty[] cannot be converted to InArgument`1[UserInteractionProperty[]]. So how do I convert my array of UserInteractionProperties into an InArgument?

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• named_scope or find_by_sql?

  - by keruilin

  I have three models: User Award Trophy The associations are: User has many awards Trophy has many awards Award belongs to user Award belongs to trophy User has many trophies through awards Therefore, user_id is a fk in awards, and trophy_id is a fk in awards. In the Trophy model, which is an STI model, there's a trophy_type column. I want to return a list of users who have been awarded a specific trophy -- (trophy_type = 'GoldTrophy'). Users can be awarded the same trophy more than once. (I don't want distinct results.) Can I use a named_scope? How about chaining them? Or do I need to use find_by_sql? Either way, how would I code it?

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• SQL Server join and wildcards

  - by Ernst

  I want to get the results of a left join between two tables, with both having a column of the same name, the column on which I join. The following query is seen as valid by the import/export wizard in SQL Server, but it always gives an error. I have some more conditions, so the size wouldn't be too much. We're using SQL Server 2000 iirc and since we're using an externally developed program to interact with the database (except for some information we can't retrieve that way), we can not simply change the column name. SELECT table1.*, table2.* FROM table1 LEFT JOIN table2 ON table1.samename = table2.samename At least, I think the column name is the problem, or am I doing something else wrong?

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• Active Directory List OU's

  - by Stephen Murby

  I have this code currently, string defaultNamingContext; DirectoryEntry rootDSE = new DirectoryEntry("LDAP://RootDSE"); defaultNamingContext = rootDSE.Properties["defaultNamingContext"].Value.ToString(); rootDSE = new DirectoryEntry("LDAP://" + defaultNamingContext); //DirectoryEntry domain = new DirectoryEntry((string)"LDAP://" + defaultNamingContext); DirectorySearcher ouSearch = new DirectorySearcher(rootDSE,"(objectCategory=Organizational-Unit)", null, SearchScope.Subtree); MessageBox.Show(rootDSE.Path.ToString()); try { SearchResultCollection collectedResult = ouSearch.FindAll(); foreach (SearchResult temp in collectedResult) { comboBox1.Items.Add(temp.Properties["name"][0]); DirectoryEntry ou = temp.GetDirectoryEntry(); } } When i use the debugger i can see that rootDSE.Path is infact pointing to the right place, in this case "DC=g-t-p,DC=Local" but the directory searcher doesn't find any results. Can anyone help?

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• Using a table-alias in Kohana queries?

  - by Aristotle

  I'm trying to run a simple query with $this->db in Kohana, but am running into some syntax issues when I try to use an alias for a table within my query: $result = $this->db ->select("ci.chapter_id, ci.book_id, ci.chapter_heading, ci.chapter_number") ->from("chapter_info ci") ->where(array("ci.chapter_number" => $chapter, "ci.book_id" => $book)) ->get(); It seems to me that this should work just fine. I'm stating that "chapter_info" ought to be known as "ci," yet this isn't taking for some reason. The error is pretty straight-forward: There was an SQL error: Table 'gb_data.chapter_info ci' doesn't exist - SELECT `ci`.`chapter_id`, `ci`.`book_id`, `ci`.`chapter_heading`, `ci`.`chapter_number` FROM (`chapter_info ci`) WHERE `ci`.`chapter_number` = 1 AND `ci`.`book_id` = 1 If I use the full table name, rather than an alias, I get the expected results without error. This requires me to write much more verbose queries, which isn't ideal. Is there some way to use shorter names for tables within Kohana's query-builder?

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• Spring Data MongoDB Date between two Dates

  - by sics

  i'm using Spring Data for MongoDB and got the following classes class A { List<B> b; } class B { Date startDate; Date endDate; } when i save an object of A it gets persisted like { "_id" : "DQDVDE000VFP8E39", "b" : [ { "startDate" : ISODate("2009-10-05T22:00:00Z"), "endDate" : ISODate("2009-10-29T23:00:00Z") }, { "startDate" : ISODate("2009-11-01T23:00:00Z"), "endDate" : ISODate("2009-12-30T23:00:00Z") } ] } Now i want to query the db for documents matching entries in b where a given date is between startDate and endDate. Query query = new Query(Criteria.where("a").elemMatch( Criteria.where("startDate").gte(date) .and("endDate").lte(date) ); Which results in the following mongo query: { "margins": { "$elemMatch": { "startDate" : { "$gte" : { "$date" : "2009-11-03T23:00:00.000Z"}}, "endDate" : { "$lte" : { "$date" : "2009-11-03T23:00:00.000Z"}} } } } but returns no resulting documents. Does anybody know what i'm doing wrong? I don't get it... Thank you very much in advance!!

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• How to use Zend Cache with SimpleXML objects?

  - by Jeremy Hicks

  I'm trying to cache the user timeline of a Twitter feed using Zend_Service_Twitter which returns its results as a SimpleXML object. Unfortunately the regular serialize functions (which Zend Cache uses) don't play nice with SimpleXMl objects. I found this http://www.mail-archive.com/[email protected]/msg18133.html. So it looks like I'll need to create some kind of custom frontend for Zend Cache to be able to change the serialize function used. Anybody ever done this already or can point me where to look to start?

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• searching between dates in MYSQL in this format 03/17/10.11:22:45

  - by Kelso

  I have a script that automatically populates a mysql database with data every hour. It populates the date field like 03/17/10.12:34:11 and so on. I'm working on pulling data based on 1 day at a time from a search script. If i use select * from call_logs where call_initiated between '03/17/10.12:00:00' and '03/17/10.13:00:00' it works, but when I try to add the rest of the search params, it ignores the call_initiated field. select * from call_logs where caller_dn='2x9xxx0000' OR called_dn='2x9xxx0000' AND call_initiated between '03/17/10.12:00:00' and '03/17/10.13:00:00' ^-- I x'd out a couple of the numbers. I've also tried without the between function, and used = <= to pull the records, but have the same results. Im sure its an oversight, thanks in advance.

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• iphone build error that makes me want to buy a nail gun

  - by sol

  I'm just trying to build a simple update (which I have done before) for an iphone app, but now for some reason I'm getting this error. Can anyone tell me what it means? Command/Developer/Library/Xcode/Plug-ins/CoreBuildTasks.xcplugin/Contents/Resources/copyplist failed with exit code 127 sh: plutil: command not found Here are the Build Results: CopyPNGFile /Users/me/path/build/Dist-iphoneos/MyApp.app/img_000.png images/img_000.png cd /Users/me/ setenv COPY_COMMAND /Developer/Library/PrivateFrameworks/DevToolsCore.framework/Resources/pbxcp setenv PATH "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Developer/usr/bin:/System/Library/Frameworks/JavaVM.frameworK/Versions/1.6/Home/" "/Developer/Platforms/iPhoneOS.platform/Developer/Library/Xcode/Plug-ins/iPhoneOS Build System Support.xcplugin/Contents/Resources/copypng" -compress "" /Users/path/images/img_000.png /Users/me/path/build/Dist-iphoneos/MyApp.app/img_000.png sh: dirname: command not found CopyPlistFile /Users/me/path/build/Dist-iphoneos/MyApp.app/Entitlements.plist Entitlements.plist cd /Users/me/ setenv PATH "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Developer/usr/bin:/System/Library/Frameworks/JavaVM.frameworK/Versions/1.6/Home/" /Developer/Library/Xcode/Plug-ins/CoreBuildTasks.xcplugin/Contents/Resources/copyplist --convert binary1 Entitlements.plist --outdir /Users/me/path/build/Dist-iphoneos/MyApp.app sh: plutil: command not found

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• Code changes in the Dtsx file in an SSIS package not reflecting after deploying and running on the server

  - by SKumar

  I have some folder called Test-Deploy in which I keep all the dtsx files, manifest and configuration files. Whenever I want to deploy the ssis package, I run manifest file in this folder and deploy. My problem is I have to change one of the dtsx files out of it. So, I opened only that particular dtsx file BI studio, updated and built. After the build, I copied the dtsx file from bin folder and copied to my Test-Deploy folder. When I deployed and run this new package in the Test-Deploy folder, the changes I made are not reflecting in the result. I could not find any difference in the results before and after changing. My doubt is has it saved my previous dtsx file somewhere on the server and executing the same dtsx file instead of the new one?

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• simple div containing span won't size correctly

  - by brad

  I thought I was pretty knowledgeable about CSS but this simple problem baffles me. <div><span>sample text</span></div> results in the div's height being smaller than the height of the span if the span has padding. I realize that there are ways to use "float" to make the div size correctly, but floats always seem to introduce undesired side effects. Isn't there a clean simple way to tell the div to size to fit its contents? Seems pretty basic to me. Maybe I'm missing something.

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• MySQLdb not INSERTING, _mysql does fine.

  - by Mad_Casual

  Okay, I log onto the MySQL command-line client as root. I then open or otherwise run a python app using the MySQLdb module as root. When I check the results using python (IDLE), everything looks fine. When I use the MySQL command-line client, no INSERT has occurred. If I change things around to _mysql instead of MySQLdb, everything works fine. I'd appreciate any clarification(s). "Works" until IDLE/Virtual machine is reset: <pre><code>import MySQLdb db = MySQLdb.connect(user='root', passwd='*******',db='test') cursor = db.cursor() cursor.execute("""INSERT INTO test VALUES ('somevalue');""",)</code></end> Works: <pre><code>import _mysql db = _mysql.connect(user='root', passwd='*******',db='test') db.query("INSERT INTO test VALUES ('somevalue');")</code></end> System info: Intel x86 WinXP Python 2.5 MySQL 5.1.41 MySQL-Python 1.2.2

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• How to control order of assignment for new identity column in SQL Server?

  - by alpav

  I have a table with CreateDate datetime field default(getdate()) that does not have any identity column. I would like to add identity(1,1) field that would reflect same order of existing records as CreateDate field (order by would give same results). How can I do that ? I guess if I create clustered key on CreateDate field and then add identity column it will work (not sure if it's guaranteed), is there a good/better way ? I am interested in SQL Server 2005, but I guess the answer will be the same for SQL Server 2008, SQL Server 2000.

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• Windbg + IDA: calculate an address in a module

  - by Benjamin

  Hi all, I'm debugging remotely a windows XP machine. One of my drivers is loaded at address 0xb2c4c000 up to 0xb2cb9680. Now when I open my driver in IDA, the offset I want to set a breakpoint on is at 00017619. How can I effectively match my IDA address into windbg? I've tried the obvious which is to sum 0xb2c4c000 + 00017619 = 0xB2C635F7 and disassemble that address using the 'u' command in windbg. But the results did not match the assembly in IDA. On the side question: is there a way to cancel a command that is running in windbg? Several times I've ran commands that took ages to process, I would like to be able to cancel them if needed. So I can keep working. Thanks for your time.

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• FTS: Searching across multiple fields 'intelligently'

  - by Wild Thing

  Hi, I have a SP using FTS (Full Text Search). I want searches across multiple fields, 'intelligently' ranking results based on the weights I assign. Consider a search on a view fetching data from tables: Book, Author and Genre. Now, I want the searcher to be able to do: "Ludlum Fiction", "Robert Ludlum Bourne", "Bourne Ludlum", etc. Unfortunately, the only way I have been able to do that at present is this: http://pastebin.com/fdce11ff This is pretty bad, because I am manually breaking up the search string. I know I am doing this completely the wrong way, but can't figure out the right way to search across multiple fields in FTS. Can somebody help please?

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• How to get debugging statements for Android in Eclipse

  - by Gerry

  I've read the lame documentation, and checked other answers. I'd like my Android app to print some debug statements in the logcat window of Eclispe. If I use the isLoggable method on the various types of debug levels on the Log class, I find that WARN and INFO are returning true. Log.w, and Log.i do not produce any output. Does anyone know which gotchas I've missed? And just to vent, why should this be hard? I've published apps for iphone and bberry and while appreciate the use of java, the platform is reeking of too many "genuiuses" being involved. I suppose Activities and Intents are very flexible, but why? I just want to put up some screens, take some input and show some results. The bberry pushscreen and popscreen is a lot less pretentious. Thanks, Gerry

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• WPF ItemsControl - how to know when the items finished loading, so that I can focus the first one?

  - by Tomáš Kafka

  Hi everyone, I have an ItemsControl in my View, that is bound to an ObservableCollection from ViewModel. The collection is filled, and afterwards an event from VM to view is raised (think search results and SearchFinished event). I would like to move keyboard focus to the first item in an ItemsControl, but when I do it in View's code-behind when handling SearchFinished, the items are not yet rendered (the collection is filled already, but wpf's rendering is asynchronous and didn't happen yet), so there is nothing to focus (Focus() needs to have the items' visual tree already constructed). I wanted to do (myItemsControl.ItemContainerGenerator.ContainerFromIndex(0) as UIElement).Focus();, but as the 0th item is not yet loaded, ContainerFromIndex(0) returns null. I tried delaying it with Dispatcher.BeginInvoke... with low priority, but that is dependent on exact timing and usually doesn't work. How can I wait until the first item in ItemsControl is Loaded?

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