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File Format Conversion to TIFF. Some issues???

- by Nains

I'm having a proprietary image format SNG( a proprietary format) which is having a countinous array of Image data along with Image meta information in seperate HDR file. Now I need to convert this SNG format to a Standard TIFF 6.0 Format. So I studied the TIFF format i.e. about its Header, Image File Directories( IFD's) and Stripped Image Data. Now I have few concerns about this conversion. Please assist me. SNG Continous Data vs TIFF Stripped Data: Should I convert SNG Data to TIFF as a continous data in one Strip( data load/edit time problem?) OR make logical StripOffsets of the SNG Image data. SNG Data Header uses only necessary Meta Information, thus while converting the SNG to TIFF, some information can’t be retrieved such as NewSubFileType, Software Tag etc. So this raises a concern that after conversion whether any missing directory information such as NewSubFileType, Software Tag etc is necessary and sufficient condition for TIFF File. Encoding of each pixel component of RGB Sample in SNG data: Here each SNG Image Data Strip per Pixel component is encoded as: Out^[i] := round( LineBuffer^[i * 3] * **0.072169** + LineBuffer^[i * 3 + 1] * **0.715160** + LineBuffer^[i * 3+ 2]* **0.212671**); Only way I deduce from it is that each Pixel is represented with 3 RGB component and some coefficient is multiplied with each component to make the SNG Viewer work RGB color information of SNG Image Data. (Developer who earlier work on this left, now i am following the trace :)) Thus while converting this to TIFF, the decoding the same needs to be done. This raises a concern that the how RBG information in TIFF is produced, or better do we need this information?. Please assist...

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Building Web Application project using MSBuild from command line on 64-bit: missing targets file

- by James Allen

Building a solution containing a web application project using MSBuild from powershell like this: msbuild "/p:OutDir=$build_dir\" $solution_file Works fine for me on 32-bit, but on a 64-bit machine I am running into this error: error MSB4019: The imported project "C:\Program Files\MSBuild\Microsoft\VisualStudio\v9.0\WebApplications\Microsoft.WebApplication.targets" was not found. Confirm that the path in the declaration is correct, and that the file exists on disk. I am using Visual Studio 2008 and powershell v2. The problem has already been documented here and here. Basically on 64-bit install of VS, the Microsoft.WebApplication.targets needed by MSBuild is in the Program Files(x86) dir, not the Program Files dir, but MSBuild doesn't recognise this and so looks in the wrong place. The two solutions are not ideal: Manually copy the file on 64-bit from Program Files(x86) to Program Files. This is a poor solution - every dev will have to do this manually. Manually edit the csproj file so MSBuild looks in the right place. Again not ideal: I would rather not have to get everyone on 64bit to manually edit csproj files on every new project. e.g. <Import Project="$(MSBuildExtensionsPathx86)\$(WebAppTargetsSuffix)" Condition="Exists('$(MSBuildExtensionsPathx86)\$(WebAppTargetsSuffix)')" /> Ideally I want a way to tell MSBuild to import the target file form the right place from the command line but I can't work out how to do that. Any solutions?

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is it possible to add DataRelation to DataSet if child table contains rows that have no parent in pa

- by matti

If I fill the DataSet with DataAdapters that select all rows from Orders and Customers and call: private void CreateRelation() { // Get the DataColumn objects from two DataTable objects // in a DataSet. Code to get the DataSet not shown here. DataColumn parentColumn = DataSet1.Tables["Customers"].Columns["CustID"]; DataColumn childColumn = DataSet1.Tables["Orders"].Columns["CustID"]; // Create DataRelation. DataRelation relCustOrder; relCustOrder = new DataRelation("CustomersOrders", parentColumn, childColumn); // Add the relation to the DataSet. DataSet1.Relations.Add(relCustOrder); } (from http://msdn.microsoft.com/en-us/library/system.data.datarelation.aspx) there will be a runtime error if there is orders that do not have customers. This might happen when a buggy program has not deleted customer's orders when customer was deleted. What can I do except put Orders select string a additional where-condition: CUSTID IN (SELECT DISTINCT CUSTID FROM CUSTOMERS) OR: is it really that way (that all children have to have parents)? My code might have a bug also. The exception occurs when IN MY CODE I add the relation to filled DataSet. The exception is: An unhandled exception of type 'System.ArgumentException' occurred in System.Data.dll Additional information: This constraint cannot be enabled as not all values have corresponding parent values. Thanks & Best Regards - Matti

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Android media thumbnails. Serious issues?

- by Ralphleon

I've been playing with android's thumbnails for a while now, and I've seen some inconsistencies that make me want to scream. My goal is to have a simple list of all Images (and a separate list for video) with the thumbnail and filename. Device: HTC Evo (fresh from Google I/o) First off: http://androidsamples.blogspot.com/2009/06/how-to-display-thumbnails-of-images.html That code doesn't seem to work at all, thumbnails are duplicated... some with the "mirror" effect and some without. Also some won't load and just display a black square. I've tried rebuilding the thumbnails by deleting the "alblum thumbs" directory from the SD card. HTC's gallery application seem to show everything fine. This approach seems to work: Bitmap thumb = MediaStore.Images.Thumbnails.getThumbnail( getContentResolver(), id, MediaStore.Video.Thumbnails.MICRO_KIND, null); imageView.setImageBitmap(curThumb); where id is the original images id and imageView is some image view. This is great! But, strangely, way too slow to be used inside a SimpleViewBinder. Next approach: String [] proj = {MediaStore.Images.Thumbnails._ID}; Cursor c = managedQuery(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, proj, MediaStore.Images.Thumbnails.IMAGE_ID + "=" +id , null, null); if (c != null && c.moveToFirst()) { Uri thumb = Uri.withAppendedPath(mThumbUri,c.getLong(0)+""); imageView.setImageURI(thumb); } I should explain that I feel the needed WHERE condition is required because there doesn't seem to be any guarantee that your uri will have the same ID for both a thumbnail and its parent image. This works for all of the current images, but as soon as I start adding pictures with the camera they show up as blank! Debugging shows a dreaded: SkImageDecoder::Factory returned null error and the URI is returned as invalid. These are the same images that work with the previous call. Can anyone either catch my logical failure or point me to some working code?

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Gallio MbUnit and Team City problem

- by Bernard Larouche

I asked a question this morning about an integration problem between Gallio and Team City. I changed the msbuild file to use the proper syntax with the latest Gallio build script API. Thank you for that Jeff Brown but now when I tried to build the application on Team City I get the following error : An unexpected error occurred during execution of the Gallio task.[16:19:49]: [Project "CoderForTraders.msbuild.teamcity.patch.tcprojx" (RebuildSolution;RunTests target(s)):] C:\TeamCity\buildAgent\work\fa1d38b0af329d65\CoderForTraders.msbuild(9, 9): FilterParseException: Colon expected Here's line 9 : <Gallio IgnoreFailures="true" Filter="Type=SomeFixture" Files="@(TestFile)"> and here is the whole file : <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">  <UsingTask AssemblyFile="C:\Gallio\bin\Gallio.MSBuildTasks.dll" TaskName="Gallio" />  <ItemGroup> <TestFile Include="C:\_CBL\CBL\CoderForTraders\Source\trunk\UnitTest\DomainModel.Tests\bin\Debug\CBL.CoderForTraders.DomainModel.Tests.dll" /> </ItemGroup> <Target Name="RunTests"> <Gallio IgnoreFailures="true" Filter="Type=SomeFixture" Files="@(TestFile)">  <Output TaskParameter="ExitCode" PropertyName="ExitCode"/> </Gallio> <Error Text="Tests execution failed" Condition="'$(ExitCode)' != 0" /> </Target> <Target Name="RebuildSolution"> <Message Text="Starting to Build"/> <MSBuild Projects="CoderForTraders.sln" Properties="Configuration=Debug" Targets="Rebuild" /> </Target> </Project> Do you have an idea about the possible problem ?

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iPhone:How to make an integer array and store values in Obj-C?

- by user187532

Hi, I want to know a simple thing, which i couldn't get it is that i want to store 10 values in an integer array dynamically and then i have to check that stored values and compared with the current values whether it is same or not in some other condition. Initially i tried same like C array, int temp[10], but seems to be that is not possible to set and get method, then i tried NSNumber like below, In AppDelagate file, NSMutableArray *reqID; @property (nonatomic,readwrite) NSMutableArray * reqID; @synthesize reqID; ........................ ........................ ........................ In Some other file, int rd = (1+arc4random() % [arr count]); [myDelagate.reqID addObject:[NSNumber numberWithUnsignedInteger:rd]]; then i need to check, for (int i=0; i<10; i++) { NSUInteger anInt = [[amyDelagate.reqID objectAtIndex:i] unsignedIntegerValue]; if ( anInt==rd ) { rd = (1+arc4random() % [arr count]); break; } } [myDelagate.reqID addObject:[NSNumber numberWithUnsignedInteger:rd]]; But it doesn' work as expected, i.e array value doesn't give proper value. i don't know how to use integer array in Obj-C and handle it to access later etc. Could someone please explian me?

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Why should we call SuppressFinalize when we dont have a destructor

- by somaraj

I have few Question for which I am not able to get a proper answer . 1) Why should we call SuppressFinalize in the Dispose function when we dont have a destructor . 2) Dispose and finalize are used for freeing resources before the object is garbage collected. Whether it is managed or unmanaged resource we need to free it , then why we need a condition inside the dispose funtion , saying pass 'true' when we call this overriden function from IDisposable:Dispose and pass false when called from a finalize. See the below code i copied from net. class Test : IDisposable { private bool isDisposed = false; ~Test() { Dispose(false); } protected void Dispose(bool disposing) { if (disposing) { // Code to dispose the managed resources of the class } // Code to dispose the un-managed resources of the class isDisposed = true; } public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } } what if I remove the boolean protected Dispose function and implement the as below. class Test : IDisposable { private bool isDisposed = false; ~Test() { Dispose(); } public void Dispose() { // Code to dispose the managed resources of the class // Code to dispose the un-managed resources of the class isDisposed = true; // Call this since we have a destructor . what if , if we dont have one GC.SuppressFinalize(this); } }

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Implement System.Web.Caching.Cache Object in a controller to cache specific query

- by Julien

Hello World! I'm Julien and I have a question is it correct to implement my caching object like this in my controller : public class HomeController : BaseController { public static Cache cachingControl = new Cache(); ... And I Use it like this : public ActionResult Home() { IndexViewData view = new IndexViewData(); view.UserId = UserId; if (cachingControl.Get("viewHome") != null) { view = (IndexViewData)cachingControl.Get("viewHome"); } else { view.allAdsList = AllAds(5000, 0); if (Request.QueryString["voirTous"] != null) view.loadGeneral(true); else view.loadGeneral(false); cachingControl.Insert("viewHome", view); } view.adsList = SetupSearch(5, false, 0); return View(view); } But When I Call this line : if (cachingControl.Get("viewHome") != null) { They trow me the error NullErrorException But I know it can be null this is why i'm put this condition to Do you have an alternative or a tips for me thank you! P.S.: I Know that the code is weird :P but I must to support it ... Julien

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WPF - Getting the value of one a DataGridCell from within DataTemplateSelector

- by Andy T

Hi, I'm using DataTemplateSelector with the WPFToolkit DataGrid. I want to select the editing template for one cell based on the value of another cell on the same row. The DataTemplateSelector's SelectTemplate method takes two arguments: one is the data item displayed by the grid row, the other is the grid cell. What I want to know is how to get the value of another cell from within the SelectTemplate method. However, I'm not sure of the correct way to get this information by accessing properties of the cell. public class RangeValuesEditTemplateSelector : DataTemplateSelector { public DataTemplate NumberTemplate{get; set;} public DataTemplate TextTemplate{get; set;} public override DataTemplate SelectTemplate(object item, DependencyObject container) { //TODO: need to find the correct way to populate the if condition below DataGridCell theCell = container as DataGridCell; if (theCell.something.somethingElse) { return NumberTemplate; }else{ return TextTemplate; } } } Can anyone help? Many thanks in advance. AT

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Regex to remove conditional comments

- by cnu

I want a regex which can match conditional comments in a HTML source page so I can remove only those. I want to preserve the regular comments. I would also like to avoid using the .*? notation if possible. The text is foo  bar and I want to remove everything in  EDIT: It is because of BeautifulSoup I want to remove these tags. BeautifulSoup fails to parse and gives an incomplete source EDIT2: [if IE] isn't the only condition. There are lots more and I don't have any list of all possible combinations. EDIT3: Vinko Vrsalovic's solution works, but the actual problem why beautifulsoup failed was because of a rogue comment within the conditional comment. Like  <![endif]--> Notice the  comment? Though my problem was solve, I would love to get a regex solution for this.

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Problem with logicalOR ( regex ) not greedy

- by Marin Doric

This is the part of a string "21xy5". I want to insert " * " surrounded with whitespace between: digit and letter, letter and digit, letter and letter. I use this regex pattern "\d[a-z]|[a-z]\d|[a-z][a-z]" to find indexs where I gona insert string " * ". Problem is that when regex OR(|) in string 21xy5 trays to match 21-x|x-y|y-5, when first condition 21-x success, second x-y is not checked, and third success. So I have 21 * xy * 5 instead 21 * x * y * 5. If input string is like this xy21, then x-y success and then I have x * y21. Problem is that logical OR is not greedy. Regex reg = new Regex(@"\d[a-z]|[a-z]\d|[a-z][a-z]" ); MatchCollection matchC; matchC = reg.Matches(input); int ii = 1; foreach (Match element in matchC) { input = input.Insert(element.Index + ii, " * "); ii += 3; } return input;

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htaccess mod_rewrite check file/directory existence, else rewrite?

- by devians

I have a very heavy htaccess mod_rewrite file that runs my application. As we sometimes take over legacy websites, I sometimes need to support old urls to old files, where my application processes everything post htaccess. My ultimate goal is to have a 'Demilitarized Zone' for old file structures, and use mod rewrite to check for existence there before pushing to the application. This is pretty easy to do with files, by using: RewriteCond %{IS_SUBREQ} true RewriteRule .* - [L] RewriteCond %{ENV:REDIRECT_STATUS} 200 RewriteRule .* - [L] RewriteCond Public/DMZ/$1 -F [OR] RewriteRule ^(.*)$ Public/DMZ/$1 [QSA,L] This allows pseudo support for relative urls by not hardcoding my base path (I cant assume I will ever be deployed in document root) anywhere and using subrequests to check for file existence. Works fine if you know the file name, ie http://domain.com/path/to/app/legacyfolder/index.html However, my legacy urls are typically http://domain.com/path/to/app/legacyfolder/ Mod_Rewrite will allow me to check for this by using -d, but it needs the complete path to the directory, ie RewriteCond Public/DMZ/$1 -F [OR] RewriteCond /var/www/path/to/app/Public/DMZ/$1 -d RewriteRule ^(.*)$ Public/DMZ/$1 [QSA,L] I want to avoid the hardcoded base path. I can see one possible solutions here, somehow determining my path and attaching it to a variable [E=name:var] and using it in the condition. Another option is using -U, but the tricky part is stopping it from hijacking every other request when they should flow through, since -U is really easy to satisfy. Any implementation that allows me to existence check a directory is more than welcome. I am not interested in using RewriteBase, as that requires my htaccess to have a hardcoded base path.

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Checking for corrupt war file after mvn install

- by Tauren

Is there a maven command that will verify that a WAR file is valid and not corrupt? Or is there some other program or technique to validate zip files? I'm on Ubuntu 9.10, so a linux solution is preferred. On occasion, I end up with a corrupt WAR file after doing mvn clean and mvn install on my project. If I extract the WAR file to my hard drive, an error occurs and the file doesn't get extracted. I believe this happens when my system is in a low-memory condition, because this tends to happen only when lots of memory is in use. After rebooting, doing a mvn install always gives a valid WAR file. Because this happens infrequently, I don't typically test the file by uncompressing it. I transfer the 50MB war file to my server and then restart Jetty with it as the root webapp. But when the file is corrupt, I get a java.util.zip.ZipException: invalid block type error. So I'm looking for a quick way to validate the file as soon as mvn install is completed. Is there a maven command to do this? Any other ideas?

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How to replace a block of HTML with another block of HTML using jQuery

- by tonsils

Hi, Would appreciate some help with based on a condition, would like to replace the following html block: <table class="t12PageBody" cellpadding="0" cellspacing="0" width="100%" summary=""> <tr><td colspan="2">#REGION_POSITION_01#</td></tr> </table> <table width="100%" summary=""> <tr> <td class="t12ContentBody" valign="top"> #SUCCESS_MESSAGE# #NOTIFICATION_MESSAGE# #BOX_BODY# #REGION_POSITION_04##REGION_POSITION_05##REGION_POSITION_06##REGION_POSITION_07##REGION_POSITION_08#</td> <td align="right" valign="top" class="t12ContentBody">#REGION_POSITION_03#<br /></td> </tr> </table> with this block: <div id = "banner"> <div class="Logo"></div> <img src="http://www.abc.com/home/images/spacer.gif" height="35" width="180" border="0" alt=""> <font class="bannertext">&APPNAME.</font> <div class="bannerText"> <div class="hmenu"><ul>&APPLICATION_LINKS.</ul></div> </div> I looked at the replace function in query but unsure how to apply. Thanks.

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IIS as proxy to rails/mongrel - force a proxied host to generate REMOTE_USER

- by rbn

Hello -- Using Application Request Routing I have IIS 7.5 set up as a reverse proxy to a Mongrel service which is serving a rails app. IIS is set up to use Windows Auth and is working but I cannot access the REMOTE_USER variable in the rails app to get at current user's identity. I have inspected the request object in rails and I don't have any other variables like LOGON_USER, HTTP_REMOTE_USER, AUTH_USER, etc. I am trying to find a way to inject the REMOTE_USER variable into Mongrel's server variables. This post describes what I am looking for using mod_rewrite on Apache but I am having trouble recreating this rule for iis. this is the rewrite rule from the post mentioned above for Apache RewriteEngine On RewriteCond %{LA-U:REMOTE_USER} (.+) RewriteRule . - [E=RU:%1] Header add X-Forwarded-User %{RU}e I tried reproducing the rule in IIS and got a URL Rewrite Module error ("The condition's expression "%{LA-U:REMOTE_USER}" is invalid."). I know I'm probably using Apache syntax where IIS syntax is needed but am not sure how to proceed at this point. Any help greatly appreciated.

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Soft Paint Bucket Fill: Colour Equality

- by Bart van Heukelom

I'm making a small app where children can fill preset illustrations with colours. I've succesfully implemented an MS-paint style paint bucket using the flood fill argorithm. However, near the edges of image elements pixels are left unfilled, because the lines are anti-aliased. This is because the current condition on whether to fill is colourAtCurrentPixel == colourToReplace (the colours are RGB uints) I'd like to add a smoothing/treshold option like in Photoshop and other sophisticated tools, but what's the algorithm to determine the equality/distance between two colours? if (match(pixel(x,y), colourToReplace) setpixel(x,y,colourToReplaceWith) How to fill in match()? Here's my current full code: var b:BitmapData = settings.background; b.lock(); var from:uint = b.getPixel(x,y); var q:Array = []; var xx:int; var yy:int; var w:int = b.width; var h:int = b.height; q.push(y*w + x); while (q.length != 0) { var xy:int = q.shift(); xx = xy % w; yy = (xy - xx) / w; if (b.getPixel(xx,yy) == from) { b.setPixel(xx,yy,to); if (xx != 0) q.push(xy-1); if (xx != w-1) q.push(xy+1); if (yy != 0) q.push(xy-w); if (yy != h-1) q.push(xy+w); } } b.unlock(null);

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Is a VCS appropriate for usage by a designer?

- by iconiK

I know that a VCS is absolutely critical for a developer to increase productivity and protect the code, no doubts about it. But what about a designer, using say, Photoshop (though it's not specific to any tools, just to make my point clearer). VCSs uses delta compression to store different versions of files. This works very well for code, but for images, that's a problem. Raster image files are binary formats, though vector image files are text (SVG comes to my mind) and pose to problem. The problem comes with .psd files (and any other image "source" file) - those can get pretty big and since I'm not familiar with the format, I'll consider them as binary files. How would a VCS work in this condition? The repository could be pretty darned big if the VCS server isn't able to diff the files efficiently (or worse, not at all) and over time this can become a really big pain when someone needs to check out the repository (or clone it if using a DVCS). Have any of you used a VCS for this purpose? How well does it work? I'm mostly interested in Mercurial, though this is a general situation that applies to any VCS.

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Rails validation error messages: Displaying only one per field

- by Sergio Oliveira Jr.

Rails has an annoying "feature" which displays ALL validation error messages associated with a given field. So for example if I have 3 validates_XXXXX_of :email, and I leave the field blank I get 3 messages in the error list. This is non-sense. It is better to display one messages at a time. If I have 10 validation messages for a field does it mean I will get 10 validation error messages if I leave it blank? Is there an easy way to correct this problem? It looks straightforward to have a condition like: If you found an error for :email, stop validating :email and skip to the other field. Ex: validates_presence_of :name validates_presence_of :email validates_presence_of :text validates_length_of :name, :in = 6..30 validates_length_of :email, :in = 4..40 validates_length_of :text, :in = 4..200 validates_format_of :email, :with = /^([^@\s]+)@((?:[-a-z0-9]+.)+[a-z]{2,})$/i <%= error_messages_for :comment % gives me: 7 errors prohibited this comment from being saved There were problems with the following fields: Name can't be blank Name is too short (minimum is 6 characters) Email can't be blank Email is too short (minimum is 4 characters) Email is invalid Text can't be blank Text is too short (minimum is 4 characters)

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Django users and authentication from external source

- by Boldewyn

I have a Django app that gets it's data completely from an external source (queried via HTTP). That is, I don't have the option for a local database. Session data is stored in the cache (on my development server I use a SQLite database, so that is no error source). I'm using bleeding edge Django 1.1svn. Enter the problem: I want to use Django's own authentication system for the users. It seems quite simple to write my own Authentication Backend, but always just under the condition that you have a local database where to save the users. Without database my main problem is persistence. I tried it with the following (assume that datasource.get() is a function that returns some kind of dict): class ModelBackend (object): """Login backend.""" def authenticate (self, username=None, password=None): """Check, if a given user/password combination is valid""" data = datasource.get ('login', username, password) if data and data['ok']: return MyUser (username=username) else: raise TypeError return None def get_user (self, username): """get data about a specific user""" try: data = datasource.get ('userdata', username) if data and data['ok']: return data.user except: pass return None class MyUser (User): """Django user who isn't saved in DB""" def save (self): return None But the intentionally missing save() method on MyUser seems to break the session storage of a login. How should MyUser look like without a local database?

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SQL 2005 indexed queries slower than unindexed queries

- by uos??

Adding a seemingly perfectly index is having an unexpectedly adverse affect on a query performance... -- [Data] has a predictable structure and a simple clustered index of the primary key: ALTER TABLE [dbo].[Data] ADD PRIMARY KEY CLUSTERED ( [ID] ) -- My query, joins on itself looking for a certain kind of "overlapping" records SELECT DISTINCT [Data].ID AS [ID] FROM dbo.[Data] AS [Data] JOIN dbo.[Data] AS [Compared] ON [Data].[A] = [Compared].[A] AND [Data].[B] = [Compared].[B] AND [Data].[C] = [Compared].[C] AND ([Data].[D] = [Compared].[D] OR [Data].[E] = [Compared].[E]) AND [Data].[F] <> [Compared].[F] WHERE 1=1 AND [Data].[A] = @A AND @CS <= [Data].[C] AND [Data].[C] < @CE -- Between a range [Data] has about a quarter-million records so far, 10% to 50% of the data satisfies the where clause depending on @A, @CS, and @CE. As is, the query takes 1 second to return about 300 rows when querying 10%, and 30 seconds to return 3000 rows when querying 50% of the data. Curiously, the estimated/actual execution plan indicates two parallel Clustered Index Scans, but the clustered index is only of the ID, which isn't part of the conditions of the query, only the output. ?? If I add this hand-crafted [IDX_A_B_C_D_E_F] index which I fully expected to improve performance, the query slows down by a factor of 8 (8 seconds for 10% & 4 minutes for 50%). The estimated/actual execution plans show an Index Seek, which seems like the right thing to be doing, but why so slow?? CREATE UNIQUE INDEX [IDX_A_B_C_D_E_F] ON [dbo].[Data] ([A], [B], [C], [D], [E], [F]) INCLUDE ([ID], [X], [Y], [Z]); The Data Engine Tuning wizard suggests a similar index with no noticeable difference in performance from this one. Moving AND [Data].[F] <> [Compared].[F] from the join condition to the where clause makes no difference in performance. I need these and other indexes for other queries. I'm sure I could hint that the query should refer to the Clustered Index, since that's currently winning - but we all know it is not as optimized as it could be, and without a proper index, I can expect the performance will get much worse with additional data. What gives?

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PHP CURL Google Calendar using Private URL

- by MooCow

I'm trying to get an array of events from Google Calendar using the Private URL. I read the Google API document but I want to try doing this without using the ZEND library since I have no idea what the eventual server file structure is and avoid having other people edit the codes. I also did a search before posting and ran into the same condition where PHP CURL_EXEC returns false with the URL but I get a JSON file if the URL is open using a web browser. Since I'm using the Private URL, do I really need to authenticate against the Google server using ZEND? I'm trying to have PHP clean up the array before encoding it for Flash. $URL = <string of the private URL from Google Calendar> $ch = curl_init($URL); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); $data = curl_exec($ch); curl_close($ch); $result = json_decode($data); print '<pre>'.var_export($data,1).'</pre>'; Screen output >>> false

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Function approximation with Maclaurin series

- by marines

I need to approx (1-x)^0.25 with given accuracy (0.0001 e.g.). I'm using expansion found on Wikipedia for (1+x)^0.25. I need to stop approximating when current expression is less than the accuracy. long double s(long double x, long double d) { long double w = 1; long double n = 1; // nth expression in series long double tmp = 1; // sum while last expression is greater than accuracy while (fabsl(tmp) >= d) { tmp *= (1.25 / n - 1) * (-x); // the next expression w += tmp; // is added to approximation n++; } return w; } Don't mind long double n. :P This works well when I'm not checking value of current expression but when I'm computing 1000 or more expressions. Domain of the function is <-1;1 and s() calculates approximation well for x in <-1;~0.6. The bigger the argument is the bigger is the error of calculation. From 0.6 it exceeds the accuracy. I'm not sure if the problem is clear enough because I don't know English math language well. The thing is what's the matter with while condition and why the function s() doesn't approximate correctly.

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Subsonic 3, SimpleRepository, SQL Server: How to find rows with a null field?

- by desautelsj

How ca I use Subsonic's Find<T> method to search for rows with a field containing the "null" value. For the sake of the discussion, let's assume I have a c# class called "Visit" which contains a nullable DateTime field called "SynchronizedOn" and also let's assume that the Subsonic migration has created the corresponding "Visits" table and the "SynchronizedOn" field. If I was to write the SQL query myself, I would write something like: SELECT * FROM Visits WHERE SynchronizedOn IS NULL When I use the following code: var visits = myRepository.Find<Visit>(x => x.SynchronizedOn == null); Subsonic turns it into the following SQL query: SELECT * FROM Visits WHERE SynchronizedOn == null which never returns any rows. I tried the following code but it throws an error: visits = repository.Find<Visit>(x => x.SynchronizedOn.HasValue); I was able to use the following syntax: var query = from v in repository.All<Visit>() where v.SynchronizedOn == null orderby v.CreatedOn select v; visits = query.ToList<Visit>(); but it's not as nice an short as using the Find<T> method. Anyone knows how I can specify the "SynchronizedOn IS NULL" condition in the Find<T> method?

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LINQ - is SkipWhile broken?

- by Judah Himango

I'm a bit surprised to find the results of the following code, where I simply want to remove all 3s from a sequence of ints: var sequence = new [] { 1, 1, 2, 3 }; var result = sequence.SkipWhile(i => i == 3); // Oh noes! Returns { 1, 1, 2, 3 } Why isn't 3 skipped? My next thought was, OK, the Except operator will do the trick: var sequence = new [] { 1, 1, 2, 3 }; var result = sequence.Except(i => i == 3); // Oh noes! Returns { 1, 2 } In summary, Except removes the 3, but also removes non-distinct elements. Grr. SkipWhile doesn't skip the last element, even if it matches the condition. Grr. Can someone explain why SkipWhile doesn't skip the last element? And can anyone suggest what LINQ operator I can use to remove the '3' from the sequence above?

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Ajax call to parent window after form submission

- by David

Hi all, Pardon the complicated title. Here's my situation: I'm working on a Grails app, and using jQuery for some of the more complex UI stuff. The way the system is set up, I have an item, which can have various files (user-supplied) associated with it. On my Item/show view, there is a link to add a file. This link pops up a jQuery modal dialog, which displays my file upload form (a remote .gsp). So, the user selects the file and enters a comment, and when the form is submitted, the dialog gets closed, and the list of files on the Item/show view is refreshed. I was initially accomplishing this by adding onclick="javascript:window.parent.$('#myDialog').dialog('close');" to my submit button. This worked fine, but when submitting some larger files, I end up with a race condition where the dialog closes and the file list is refreshed before the new file is saved, and so the list of files is out of date (the file still gets saved properly). So my question is, what is the best way to ensure that the dialog is not closed until after the form submit operation completes? I've tried using the <g:formRemote tag in Grails, and closing the dialog in the "after" attribute (according to the Grails docs, the script is called after form submission), but I receive an error (taken from FireBug) stating that window.parent.$('#myDialog').dialog is not a function Is this a simple JavaScript/Grails syntax issue that I'm missing here, or am I going about this entirely wrong? Thanks so much for your time and assistance!

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