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• 3 index buffers

  - by bobobobo

  So, in both D3D and OpenGL there's ability to draw from an index buffer. The OBJ file format however does something weird. It specifies a bunch of vertices like: v -21.499660 6.424470 4.069845 v -25.117170 6.418100 4.068025 v -21.663851 8.282170 4.069585 v -21.651890 6.420180 4.068675 v -25.128481 8.281520 4.069585 Then it specifies a bunch of normals like.. vn 0.196004 0.558984 0.805680 vn -0.009523 0.210194 -0.977613 vn -0.147787 0.380832 -0.912757 vn 0.822108 0.567581 0.044617 vn 0.597037 0.057507 -0.800150 vn 0.809312 -0.045432 0.585619 Then it specifies a bunch of tex coords like vt 0.1225 0.5636 vt 0.6221 0.1111 vt 0.4865 0.8888 vt 0.2862 0.2586 vt 0.5865 0.2568 vt 0.1862 0.2166 THEN it specifies "faces" on the model like: f 1/2/5 2/3/7 8/2/6 f 5/9/7 6/3/8 5/2/1 So, in trying to render this with vertex buffers, In OpenGL I can use glVertexPointer, glNormalPointer and glTexCoordPointer to set pointers to each of the vertex, normal and texture coordinate arrays respectively.. but when it comes down to drawing with glDrawElements, I can only specify ONE set of indices, namely the indices it should use when visiting the vertices. Ok, then what? I still have 3 sets of indices to visit. In d3d its much the same - I can set up 3 streams: one for vertices, one for texcoords, and one for normals, but when it comes to using IDirect3DDevice9::DrawIndexedPrimitive, I can still only specify ONE index buffer, which will index into the vertices array. So, is it possible to draw from vertex buffers using different index arrays for each of the vertex, texcoord, and normal buffers (EITHER d3d or opengl!)

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• Multiple autocompletes on same form in socialengine

  - by Mirza Awais

  I am quite new to socialegine module development. I want to use multiple autocomplets on my one form. I have no problem of showing multiple auto completes but problem comes when one selects options from auto complete. I have seen that autocompet.js uses id toValues to show selected option from autocomlte. So if there is only one autocomplete on one form then we can have one element as toValues to show the selected value. But if we have multiple auto completes then how to show the selected item of each auto complete as separately? Using the following code for autocomplete en4.core.runonce.add(function() { new Autocompleter.Request.JSON('to', '<?php echo $this->url(array('module' => 'localspots', 'controller' => 'lookup', 'action' => 'city'), 'default', true) ?>', { 'minLength': 2, 'delay' : 1, 'selectMode': 'pick', 'autocompleteType': 'message', 'multiple': false, 'className': 'message-autosuggest', 'filterSubset' : true, 'tokenFormat' : 'object', 'tokenValueKey' : 'label', 'injectChoice': function(token){ console.log(token.type); var choice = new Element('li', {'class': 'autocompleter-choices', 'html': token.photo, 'id':token.label}); new Element('div', {'html': this.markQueryValue(token.label),'class': 'autocompleter-choice'}).inject(choice); this.addChoiceEvents(choice).inject(this.choices); choice.store('autocompleteChoice', token); }, onPush : function(){ if( $('toValues').value.split(',').length >= maxRecipients ){ $('to').disabled = true; $('to').setAttribute("class", "disabled"); } }, }); });

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• Problem with .Contains

  - by Rene

  Hello there, I have a little problem which i can't solve. I want to use an SQL-In-Statement in Linq. I've read in this Forum and in other Forums that I have to use the .Contains (with reverse-thinking-notation :-)). As input i have a List of Guids. I first copied them into an array and then did something like that : datatoget = (from p in objectContext.MyDataSet where ArrayToSearch.Contains(p.Subtable.Id.ToString()) select p).ToList(); datatoget is the result in which all records matching the Subtable.Id (which is a Guid) should be stored. Subtable is a Detail-Table from MyData, and the Id is a Guid-Type. I've tried several things (Convert Guid to String, and then using .Contains, etc), but I always get an Exception which says : 'Linq to Entities' doesn't recognize the Method 'Boolean Contains(System.Guid) and is not able to Translate this method into a memory expression. (Something like that, because I'm using the German Version of VS2008) I am using L2E with .NET 3.5 and am programming in C# with VS 2008. I've read several Examples, but it doesn't work. Is it perhaps because of using Guid's instead of strings ? I've also tried to write my own compare-function, but I don't know how to integrate it so that .NET calls my function for comparing.

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• Sample twitter application.

  - by Jack

  <?php function updateTwitter($status) { // Twitter login information $username = 'xxxxx'; $password = 'xxxxxx'; // The url of the update function $url = 'http://twitter.com/statuses/update.xml'; // Arguments we are posting to Twitter $postargs = 'status='.urlencode($status); // Will store the response we get from Twitter $responseInfo=array(); // Initialize CURL $ch = curl_init($url); // Tell CURL we are doing a POST curl_setopt ($ch, CURLOPT_POST, true); // Give CURL the arguments in the POST curl_setopt ($ch, CURLOPT_POSTFIELDS, $postargs); // Set the username and password in the CURL call curl_setopt($ch, CURLOPT_USERPWD, $username.':'.$password); // Set some cur flags (not too important) curl_setopt($ch, CURLOPT_VERBOSE, 1); curl_setopt($ch, CURLOPT_NOBODY, 0); curl_setopt($ch, CURLOPT_HEADER, 0); curl_setopt($ch, CURLOPT_FOLLOWLOCATION,1); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); // execute the CURL call $response = curl_exec($ch); // Get information about the response $responseInfo=curl_getinfo($ch); // Close the CURL connection curl_close($ch); // Make sure we received a response from Twitter if(intval($responseInfo['http_code'])==200){ // Display the response from Twitter echo $response; }else{ // Something went wrong echo "Error: " . $responseInfo['http_code']; } } updateTwitter("Just finished a sweet tutorial on http://brandontreb.com"); ?> I get the following output Error: 0 Please help.

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• [Cocoa] Can't find leak in my code.

  - by ryyst

  Hi, I've been spending the last few hours trying to find the memory leak in my code. Here it is: NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; expression = [expression stringByTrimmingCharactersInSet: [NSCharacterSet whitespaceAndNewlineCharacterSet]]; // expression is an NSString object. NSArray *arguments = [NSArray arrayWithObjects:expression, [@"~/Desktop/file.txt" stringByExpandingTildeInPath], @"-n", @"--line-number", nil]; NSPipe *outPipe = [[NSPipe alloc] init]; NSTask *task = [[NSTask alloc] init]; [task setLaunchPath:@"/usr/bin/grep"]; [task setArguments:arguments]; [task setStandardOutput:outPipe]; [outPipe release]; [task launch]; NSData *data = [[outPipe fileHandleForReading] readDataToEndOfFile]; [task waitUntilExit]; [task release]; NSString *string = [[NSString alloc] initWithBytes:[data bytes] length:[data length] encoding:NSUTF8StringEncoding]; string = [string stringByReplacingOccurrencesOfString:@"\r" withString:@""]; int linesNum = 0; NSMutableArray *possibleMatches = [[NSMutableArray alloc] init]; if ([string length] > 0) { NSArray *lines = [string componentsSeparatedByString:@"\n"]; linesNum = [lines count]; for (int i = 0; i < [lines count]; i++) { NSString *currentLine = [lines objectAtIndex:i]; NSArray *values = [currentLine componentsSeparatedByString:@"\t"]; if ([values count] == 20) [possibleMatches addObject:currentLine]; } } [string release]; [pool release]; return [possibleMatches autorelease]; I tried to follow the few basic rules of Cocoa memory management, but somehow there still seems to be a leak, I believe it's an array that's leaking. It's noticeable if possibleMatches is large. You can try the code by using any large file as "~/Desktop/file.txt" and as expression something that yields many results when grep-ing. What's the mistake I'm making? Thanks for any help! -- Ry

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• What data structure to use / data persistence

  - by Dave

  I have an app where I need one table of information with the following fields: field 1 - int or char field 2 - string (max 10 char) field 3 - string (max 20 char) field 4 - float I need the program to filter on field 1 based upon a segmented control and select a field 2 from a picker. From this data I need to look up field 4 to use in a calculation. Total records will be about 200. I never see it go above 400 - 500. I am going to use a singleton which I am able to do, I just need help with the structure for this with data persistence. What type of data structure should I use for this and should I use NSNumber, NSString, etc. or old data types like float, Char, etc. I thought about a struct put into an array but there is probably a better way. This is new to me so any help or reference to examples would be great. I also thought about a plist or dictionary but it looks like it is just a lookup and a field which obviously won't work. Core data looked like overkill to me. Also, with any recommendation how should I get initial data into it? I want the user to be able to edit and add to the database. Sorry for the old terms, you can see what generation I am from... Thanks in advance!!!!

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• My images aren't updating immediately upon changing their src in javascript

  - by Dale

  I'm using the function below to change the img src. It's an array of ten images. When going through the loop, using break points, the images don't all update on the page immediately. Some of them do. If I inspect the unchanged images on the page (while paused at a breakpoint), the src has changed, but the image hasn't changed yet. All of the unchanged images get updated correctly when the function ends. Anyone know why they don't all get updated instantly and how I can force them to update? Also, is there a way I can hold off the updates of all of them until they're all reassigned and thus have them all update on the "simultaneously"? Here's my function. function mainFunction(){ finalSet = calculateSet(); for ( var int = 0; int < finalSet.length; int++) { var fileName = "cardImg" + (int); document.getElementById(fileName).src = "images/cards/" + finalSet[int].name + ".jpg"; } } Thanks for the help. Dale

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• PHP unit tests for controller returns no errors and no success message.

  - by Mallika Iyer

  I'm using the zend modular director structure, i.e. application modules users controllers . . lessons reports blog I have a unit test for a controller in 'blog' that goes something like the below section of code: I'm definitely doing something very wrong, or missing something - as when i run the test, i get no error, no success message (that goes usually like ...OK (2 tests, 2 assertions)). I get all the text from layout.phtml, where i have the global site layout. This is my first endeavor writing a unittest for zend-M-V-C structure so probably I'm missing something important? Here goes.... require_once '../../../../public/index.php'; require_once '../../../../application/Bootstrap.php'; require_once '../../../../application/modules/blog/controllers/BrowseController.php'; require_once '../../../TestConfiguration.php'; class Blog_BrowseControllerTest extends Zend_Test_PHPUnit_ControllerTestCase { public function setUp() { $this->bootstrap = array($this, 'appBootstrap'); Blog_BrowseController::setUp(); } public function appBootstrap() { require_once dirname(__FILE__) . '/../../bootstrap.php'; } public function testAction() { $this->dispatch('/'); $this->assertController('browse'); $this->assertAction('index'); } public function tearDown() { $this->resetRequest(); $this->resetResponse(); Blog_BrowseController::tearDown(); } }

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• Using perl to split a line that may contain whitespace

  - by Tommy Fisk

  Okay, so I'm using perl to read in a file that contains some general configuration data. This data is organized into headers based on what they mean. An example follows: [vars] # This is how we define a variable! $var = 10; $str = "Hello thar!"; # This section contains flags which can be used to modify module behavior # All modules read this file and if they understand any of the flags, use them [flags] Verbose = true; # Notice the errant whitespace! [path] WinPath = default; # Keyword which loads the standard PATH as defined by the operating system. Append with additonal values. LinuxPath = default; Goal: Using the first line as an example "$var = 10;", I'd like to use the split function in perl to create an array that contains the characters "$var" and "10" as elements. Using another line as an example: Verbose = true; # Should become [Verbose, true] aka no whitespace is present This is needed because I will be outputting these values to a new file (which a different piece of C++ code will read) to instantiate dictionary objects. Just to give you a little taste of what it might look like (just making it up as I go along): define new dictionary name: [flags] # Start defining keys => values new key name: Verbose new value val: 10 # End dictionary Oh, and here is the code I currently have along with what it is doing (incorrectly): sub makeref($) { my @line = (split (/=/)); # Produces ["Verbose", " true"]; }

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• iPhone ASIHttpRequest - can't POST variables asynchronously

  - by Eamorr

  Greetings, I'm trying to simply POST data to a url using ASIHttpRequest. Here is my code: __block ASIHTTPRequest *request=[ASIHTTPRequest requestWithURL:url]; [request setPostBody:[NSMutableData dataWithData:[@"uname=Hello" dataUsingEncoding:NSUTF8StringEncoding]]]; [request setDelegate:self]; [request setCompletionBlock:^{ NSString *response=[request responseString]; UIAlertView *msg=[[UIAlertView alloc] initWithTitle:@"Response" message:response delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil]; [msg show]; [msg release]; }]; [request setFailedBlock:^{ NSError *error =[request error]; }]; [request startAsynchronous]; Basically, my url is xxx.xxx.xxx.xxx/login.php, when I dump the PHP $_POST variable, I just get an empty array - i.e. no POST parameters are sent! The rest of the PHP is tested and working fine. I've looked through the allseeing-i.com documentation and examples and can't seem to resolve this problem. Any insight greatly appreciated. Many thanks in advance,

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• Using pthread to perform matrix multiplication

  - by shadyabhi

  I have both matrices containing only ones and each array has 500 rows and columns. So, the resulting matrix should be a matrix of all elements having value 500. But, I am getting res_mat[0][0]=5000. Even other elements are also 5000. Why? #include<stdio.h> #include<pthread.h> #include<unistd.h> #include<stdlib.h> #define ROWS 500 #define COLUMNS 500 #define N_THREADS 10 int mat1[ROWS][COLUMNS],mat2[ROWS][COLUMNS],res_mat[ROWS][COLUMNS]; void *mult_thread(void *t) { /*This function calculates 50 ROWS of the matrix*/ int starting_row; starting_row = *((int *)t); starting_row = 50 * starting_row; int i,j,k; for (i = starting_row;i<starting_row+50;i++) for (j=0;j<COLUMNS;j++) for (k=0;k<ROWS;k++) res_mat[i][j] += (mat1[i][k] * mat2[k][j]); return; } void fill_matrix(int mat[ROWS][COLUMNS]) { int i,j; for(i=0;i<ROWS;i++) for(j=0;j<COLUMNS;j++) mat[i][j] = 1; } int main() { int n_threads = 10; //10 threads created bcos we have 500 rows and one thread calculates 50 rows int j=0; pthread_t p[n_threads]; fill_matrix(mat1); fill_matrix(mat2); for (j=0;j<10;j++) pthread_create(&p[j],NULL,mult_thread,&j); for (j=0;j<10;j++) pthread_join(p[j],NULL); printf("%d\n",res_mat[0][0]); return 0; }

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• using fopen on uploaded file with php

  - by Patrick

  Im uploading a file, and then attempting to use fgetcsv to do things to it. This is my script below. Everything was working fine before i added the file upload portions. Now its not showing any errors, its just not displaying the uploaded data. Im getting my "file uploaded" notice, and the file is saving properly, but the counter for number of entries is showing 0. if(isset($_FILES[csvgo])){ $tmp = $_FILES[csvgo][tmp_name]; $name = "temp.csv"; $tempdir = "csvtemp/"; if(move_uploaded_file($tmp, $tempdir.$name)){ echo "file uploaded<br>"; } $csvfile = $tempdir.$name; $fh = fopen($csvfile, 'r'); $headers = fgetcsv($fh); $data = array(); while (! feof($fh)) { $row = fgetcsv($fh); if (!empty($row)) { $obj = new stdClass; foreach ($row as $i => $value) { $key = $headers[$i]; $obj->$key = $value; } $data[] = $obj; } } fclose($fh); $c=0; foreach($data AS $key){ $c++; $phone = $key->PHONE; $fax = $key->Fax; $email = $key->Email; // do things with the data here } echo "$c entries <br>"; }

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• Memory Leak question

  - by franz

  I am having a memory leak issue with the following code. As much as I can tell I don't see why the problem persists but it still does not release when called. I am detecting the problem in instruments and the following code is keeping its "cards" classes alive even when it should had released them. Any help welcome. ... ... -(id)initDeckWithCardsPicked: (NSMutableArray*)cardsPicked andColors:(NSMutableArray*)cardColors { self = [self init]; if (self != nil) { int count = [cardsPicked count]; for (int i=0; i<count; i++) { int cardNum = [[cardsPicked objectAtIndex:i] integerValue]; Card * card = [[MemoryCard alloc] initWithSerialNumber:cardNum position: CGPointZero color:[cardColors objectAtIndex:i]]; [_cards addObject: card]; [card release]; } } return self; } - (id) init { self = [super init]; if (self != nil) { self.bounds = (CGRect){{0,0},[Card cardSize]}; self.cornerRadius = 8; self.backgroundColor = kAlmostInvisibleWhiteColor; self.borderColor = kHighlightColor; self.cards = [NSMutableArray array]; } return self; } ... ...

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• Random String Generator creates same string on multiple calls

  - by rockinthesixstring

  Hi there. I've build a random string generator but I'm having a problem whereby if I call the function multiple times say in a Page_Load method, the function returns the same string twice. here's the code ''' <summary>' ''' Generates a Random String' ''' </summary>' ''' <param name="n">number of characters the method should generate</param>' ''' <param name="UseSpecial">should the method include special characters? IE: # ,$, !, etc.</param>' ''' <param name="SpecialOnly">should the method include only the special characters and excludes alpha numeric</param>' ''' <returns>a random string n characters long</returns>' Public Function GenerateRandom(ByVal n As Integer, Optional ByVal UseSpecial As Boolean = True, Optional ByVal SpecialOnly As Boolean = False) As String Dim chars As String() ' a character array to use when generating a random string' Dim ichars As Integer = 74 'number of characters to use out of the chars string' Dim schars As Integer = 0 ' number of characters to skip out of the characters string' chars = { _ "A", "B", "C", "D", "E", "F", _ "G", "H", "I", "J", "K", "L", _ "M", "N", "O", "P", "Q", "R", _ "S", "T", "U", "V", "W", "X", _ "Y", "Z", "0", "1", "2", "3", _ "4", "5", "6", "7", "8", "9", _ "a", "b", "c", "d", "e", "f", _ "g", "h", "i", "j", "k", "l", _ "m", "n", "o", "p", "q", "r", _ "s", "t", "u", "v", "w", "x", _ "y", "z", "!", "@", "#", "$", _ "%", "^", "&", "*", "(", ")", _ "-", "+"} If Not UseSpecial Then ichars = 62 ' only use the alpha numeric characters out of "char"' If SpecialOnly Then schars = 62 : ichars = 74 ' skip the alpha numeric characters out of "char"' Dim rnd As New Random() Dim random As String = String.Empty Dim i As Integer = 0 While i < n random += chars(rnd.[Next](schars, ichars)) System.Math.Max(System.Threading.Interlocked.Increment(i), i - 1) End While rnd = Nothing Return random End Function but if I call something like this Dim str1 As String = GenerateRandom(5) Dim str2 As String = GenerateRandom(5) the response will be something like this g*3Jq g*3Jq and the second time I call it, it will be 3QM0$ 3QM0$ What am I missing? I'd like every random string to be generated as unique.

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• Replicating SQL's 'Join' in Python

  - by Daniel Mathews

  I'm in the process of trying to switch from R to Python (mainly issues around general flexibility). With Numpy, matplotlib and ipython, I've am able to cover all my use cases save for merging 'datasets'. I would like to simulate SQL's join by clause (inner, outer, full) purely in python. R handles this with the 'merge' function. I've tried the numpy.lib.recfunctions join_by, but it critical issues with duplicates along the 'key': join_by(key, r1, r2, jointype='inner', r1postfix='1', r2postfix='2', defaults=None, usemask=True, asrecarray=False) Join arrays r1 and r2 on key key. The key should be either a string or a sequence of string corresponding to the fields used to join the array. An exception is raised if the key field cannot be found in the two input arrays. Neither r1 nor r2 should have any duplicates along key: the presence of duplicates will make the output quite unreliable. Note that duplicates are not looked for by the algorithm. source: http://presbrey.mit.edu:1234/numpy.lib.recfunctions.html Any pointers or help will be most appreciated!

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• AS3 httpservice - pass arguments to event handlers by reference

  - by Shawn Simon

  I have this code: var service:HTTPService = new HTTPService(); if (search.Location && search.Location.length > 0 && chkLocalSearch.selected) { service.url = 'http://ajax.googleapis.com/ajax/services/search/local'; service.request.q = search.Keyword; service.request.near = search.Location; } else { service.url = 'http://ajax.googleapis.com/ajax/services/search/web'; service.request.q = search.Keyword + " " + search.Location; } service.request.v = '1.0'; service.resultFormat = 'text'; service.addEventListener(ResultEvent.RESULT, onServerResponse); service.send(); I want to pass the search object to the result method (onServerResponse) but if I do it in a closure it gets passed by value. Is there anyway to do it by reference without searching through my array of search objects for the value returned in the result? Sorry, this is simple but it's been a long day...

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• php scandir --> search for files/directories

  - by Peter

  Hi! I searched before I ask, without lucky.. I looking for a simple script for myself, which I can search for files/folders. Found this code snippet in the php manual (I think I need this), but it is not work for me. "Was looking for a simple way to search for a file/directory using a mask. Here is such a function. By default, this function will keep in memory the scandir() result, to avoid scaning multiple time for the same directory." <?php function sdir( $path='.', $mask='*', $nocache=0 ){ static $dir = array(); // cache result in memory if ( !isset($dir[$path]) || $nocache) { $dir[$path] = scandir($path); } foreach ($dir[$path] as $i=>$entry) { if ($entry!='.' && $entry!='..' && fnmatch($mask, $entry) ) { $sdir[] = $entry; } } return ($sdir); } ?> Thank you for any help, Peter

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• Reading a CSV with file_get_contents in PHP

  - by JPro

  I am reading a 'kind' of csv file and exploding it and storing it in array. The file I am reading has this structure Id,Log,Res,File mydb('Test1','log1','Pass','lo1.txt'). mydb('Test2','log2','Pass','lo2.txt'). mydb('Test3','log3','Pass','lo3.txt'). Now what I am trying to do is : reading the last record in my database, get the Name, lets say in this case 'Test1' and then I am searching through my file and where I can find the position of 'Test1' and get the next lines in the file, extract the ID,s and add it to database. I am getting the position of desired string in the file, but I am not sure how to get the next lines too. Here's my code so far. <?php mysql_connect("localhost", "root", "") or die(mysql_error()); mysql_select_db("testing") or die(mysql_error()); $result = mysql_query("select ID from table_1 order by S_no DESC limit 1") or die(mysql_error()); $row = mysql_fetch_array( $result ); $a = $row['ID']; echo 'Present Top Row is '.$a.'<br>'; $addresses = explode("\n", file_get_contents('\\\\fil1\\logs\\tes.pl')); foreach($addresses as $val) { $pos = strstr($val, $a); if ($pos === false) { } else { echo "The string <br> '$a' <br>was found in the string <br>'$val' <br>"; echo " and exists at position <br>$pos<br>"; } }

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• How to maintain an ordered table with Core Data (or SQL) with insertions/deletions?

  - by Jean-Denis Muys

  This question is in the context of Core Data, but if I am not mistaken, it applies equally well to a more general SQL case. I want to maintain an ordered table using Core Data, with the possibility for the user to: reorder rows insert new lines anywhere delete any existing line What's the best data model to do that? I can see two ways: 1) Model it as an array: I add an int position property to my entity 2) Model it as a linked list: I add two one-to-one relations, next and previous from my entity to itself 1) makes it easy to sort, but painful to insert or delete as you then have to update the position of all objects that come after 2) makes it easy to insert or delete, but very difficult to sort. In fact, I don't think I know how to express a Sort Descriptor (SQL ORDER BY clause) for that case. Now I can imagine a variation on 1): 3) add an int ordering property to the entity, but instead of having it count one-by-one, have it count 100 by 100 (for example). Then inserting is as simple as finding any number between the ordering of the previous and next existing objects. The expensive renumbering only has to occur when the 100 holes have been filled. Making that property a float rather than an int makes it even better: it's almost always possible to find a new float midway between two floats. Am I on the right track with solution 3), or is there something smarter?

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• MapKit custom annotations being added to map, but are not visible on the map

  - by culov

  I learned a lot from the screencast at http://icodeblog.com/2009/12/21/introduction-to-mapkit-in-iphone-os-3-0/ , and ive been trying to incorporate the way he creates a custom annotation into my iphone app. He is hardcoding annotations and adding them individually to the map, whereas i want to add them from my data source. So i have an array of objects with a lat and a lng (ive checked that the values are within range and ought to be appearing on the map) that i iterate through and do [mapView addAnnotation:truck] once this process is completed, i check the number of annotations on the map with [[mapView annotations] count] and its equal to the number it ought to be, so all the annotations are getting added onto the mapView, but for some reason I cant see any annotations in the simulator. I've compared my code with his in all the pertinent places many times, but nothing seems to stand out as being incorrect. Ive also reviewed my code for the last several hours trying to find a point where I do something wrong, but nothing is coming to mind. The images are named just as they are assigned in the custom AnnotationView, the loadAnnotation function is done properly, etc... i dont know what it could be. so i suppose if i could have the answer to one question it would be, what are possible causes for a mapView to contain several annotations, but to not show any on the map? Thanks

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• Binary search in a sorted (memory-mapped ?) file in Java

  - by sds

  I am struggling to port a Perl program to Java, and learning Java as I go. A central component of the original program is a Perl module that does string prefix lookups in a +500 GB sorted text file using binary search (essentially, "seek" to a byte offset in the middle of the file, backtrack to nearest newline, compare line prefix with the search string, "seek" to half/double that byte offset, repeat until found...) I have experimented with several database solutions but found that nothing beats this in sheer lookup speed with data sets of this size. Do you know of any existing Java library that implements such functionality? Failing that, could you point me to some idiomatic example code that does random access reads in text files? Alternatively, I am not familiar with the new (?) Java I/O libraries but would it be an option to memory-map the 500 GB text file (I'm on a 64-bit machine with memory to spare) and do binary search on the memory-mapped byte array? I would be very interested to hear any experiences you have to share about this and similar problems.

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• Selecting values from a multiselect not working in webkit

  - by azz0r

  Hello! The code below works fine in Firefox. However in Chrome and Safari it doesn't. Essentially it returns an array of values, then selects them from multiselect. However in Chrome and safari it doesn't select the items from the multiselect. $('form#movie select#movie_movie').click(function(){ var id = $(this).val(); $("#movie_category option:selected").attr('selected', ''); $("#movie_model option:selected").attr('selected', ''); $("#movie_gallery option:selected").attr('selected', ''); $("#movie_playlist option:selected").attr('selected', ''); if (id != 0) { $.ajax({ type: 'POST', url: "/administration/link/movie/id/"+id, dataType: 'json', beforeSend: function(x) { $.blockUI({theme: true, title: 'Loading', message: '<p>Please wait...</p>', timeout: 1000}); if(x && x.overrideMimeType) { x.overrideMimeType("application/json;charset=UTF-8"); } }, error: function() { $.unblockUI(); alert('Error loading object, please try again'); }, success: function(returned_values) { $.unblockUI(); $.each(returned_values.object.playlist || {}, function(i, item) {$("#movie_playlist option[value='"+item+"']").attr('selected', 'selected');}); $.each(returned_values.object.category || {}, function(i, item) {$("#movie_category option[value='"+item+"']").attr('selected', 'selected');}); $.each(returned_values.object.model || {}, function(i, item) {$("#movie_model option[value='"+item+"']").attr('selected', 'selected');}); $.each(returned_values.object.gallery || {}, function(i, item) {$("#movie_gallery option[value='"+item+"']").attr('selected', 'selected');}); } }); } }); So the part that isn't working in them is: $("#movie_playlist option[value='"+item+"']").attr('selected', 'selected'); Any ideas??

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• Fork in Perl not working inside a while loop reading from file

  - by Sag

  Hi, I'm running a while loop reading each line in a file, and then fork processes with the data of the line to a child. After N lines I want to wait for the child processes to end and continue with the next N lines, etc. It looks something like this: while ($w=<INP>) { # ignore file header if ($w=~m/^\D/) { next;} # get data from line chomp $w; @ws = split(/\s/,$w); $m = int($ws[0]); $d = int($ws[1]); $h = int($ws[2]); # only for some days in the year if (($m==3)and($d==15) or ($m==4)and($d==21) or ($m==7)and($d==18)) { die "could not fork" unless defined (my $pid = fork); unless ($pid) { some instructions here using $m, $d, $h ... } push @qpid,$pid; # when all processors are busy, wait for child processes if ($#qpid==($procs-1)) { for my $pid (@qpid) { waitpid $pid, 0; } reset 'q'; } } } close INP; This is not working. After the first round of processes I get some PID equal to 0, the @qpid array gets mixed up, and the file starts to get read at (apparently) random places, jumping back and forth. The end result is that most lines in the file get read two or three times. Any ideas? Thanks a lot in advance, S.

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• NSFetchedResultsController secondary sorting not working?

  - by binkly

  Hello, I'm using NSFetchedResultsController to fetch Message entities with Core Data. I want my tableview to group the messages by an attribute called ownerName. This works fine in the sense that I get a proper UI dispalying appropriately named sections. I can achieve this with the code below: NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"ownerName" ascending:NO]; NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptor, nil]; [fetchRequest setSortDescriptors:sortDescriptors]; NSFetchedResultsController *fetchedResultsController = nil; fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:[appDelegate managedObjectContext] sectionNameKeyPath:@"ownerName" cacheName:@"Messages"] What'd I'd like to do now is have the section with the newest message at the top; exactly how it works with the Messages app on iPhone currently. I've tried adding a second sort descriptor and putting it in an array of sort descriptors and passing that to the fetchRequest but it doesn't appear to be affecting anything. Here is the 2nd sort descriptor that I used. NSSortDescriptor *idDescriptor = [[NSSortDescriptor alloc] initWithKey:@"createdAt" ascending:YES]; If anyone could provide some insight into this I would greatly appreciate it.

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• Ajax model binding of a complex type

  - by David G

  I am trying to do something along the lines of the following where I have a Controller with an method similar to: public ActionResult Insert(Author author) { //do something... } Where the Author type looks like: public class Author { public string FirstName { get; set; } public string LastName { get; set; } public Book[] Books { get; set; } public Author() { Books = new Book[0]; } } public class Book { public string Title { get; set; } public int NumberOfPages { get; set; } } From a page I want to submit data using JQuery and Ajax something like function addAuthor() { var auth = { 'FirstName': 'Roald', 'LastName': 'Dahl', 'Books': [ { 'Title': 'Charlie and the Chocolate Factory', 'NumberOfPages': 264 }, { 'Title': 'The Twits', 'NumberOfPages': 316 } ] }; $.ajax({ type: "GET", url: "/Insert", data: auth }); } MVC binds the Author object (FirstName and LastName are set) but doesn't bind the Books property. Why is that and how can I submit an object containing an Array (or a Collection) as a property through AJAX?

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