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  • Javascript callback and google maps api question

    - by es11
    I am using google maps api v3 and have an array of arrays object: MVCArray.<MVCArray.<LatLng>> I want to iterate over this. I see that MVCArray has a method forEach which uses a call back, but I have no idea how to use this (I haven't done much js). The api defines this method as follows: forEach(callback:function(*, number))) Could somebody please show me an example of how to use this given an MVCArray of MVCArrays?

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  • jQuery - Image management

    - by kape123
    Is there a jQuery plug-in / JavaScript control that will allow me to display array of images, but with (at least) option to delete image on certain user action. Something like this: http://www.gmarwaha.com/jquery/jcarousellite/index.php but with dedicated delete button on every image. First extra option that I can think of is to rearrange order of images. If not... I guess I'll start extending mentioned jcarousellite myself....

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  • Mix of two bit sequences

    - by Tomek Tarczynski
    Is there any clever way to mix two bit sequences in such way that bits from first sequence will be on odd places, and bits from second sequence will be on even places. Both sequences are no longer than 16b so output will fit into 32bit integer. Example: First sequence : 1 0 0 1 0 0 Second sequence : 1 1 1 0 1 1 Output : 1 1 0 1 0 1 1 0 0 1 0 1 I thought about making integer array of size 2^16 and then the output would be: arr[first] << 1 | arr[second]

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  • bug/error in basis set path algorithm i can't figure out

    - by Roy McAvoy
    The following looks through a 2d array to find basis set paths. It is supposed to print out the individual paths but not repeat any and end when all paths are found. It however doesn't stop at the last path and has a bug in it somewhere in which the following happens: It goes halfway through the path and then goes to zero and ends the path for some reason. For example the table is filled with the following: all 0s, except for [1][2], [1][3], [2][4], [2][5], [3][5], [4][6], [5][6], [6][0] which all have a 1 in them. The desired paths are P1: 1 2 4 6 0 P2: 1 3 5 6 0 P3: 1 2 5 6 0. The output I get when i run the program is 12460 13560 1250 124 Any and all help on this is much appreciated, this is just the function that scans through the array looking for paths, I can add the entire program if that would be helpful. Thanks.. void find_path(int map[][MAX], int x){ int path =0; int m=1; int blah=0; bool path_found = false; do { for(int n=0;n<(x+1);n++){ if(map[m][n]==-1){ blah=(n+1); if(blah<(x+1)){ for(blah;blah<(x+1);blah++){ if(map[m][blah]==1){ map[m][blah]=-1; path=m; path_found = true; cout<<path; m=blah; n=0; } } } else{ path=m; path_found=false; cout<<path; m=n; if(m==0){ path=0; cout<<path<<endl; m=1; path_found=false; } } } else if(map[m][n]==1){ map[m][n]=-1; path=m; path_found = true; cout<<path; m=n; if(m==0){ path=0; cout<<path<<endl; m=1; path_found=false; } } } } while(m<(x+1) && path_found); }

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  • iPhone: Speeding up a search that's polling 17,000 Core Data objects

    - by randombits
    I have a class that conforms to UISearchDisplayDelegate and contains a UISearchBar. This view is responsible for allowing the user to poll a store of about 17,000 objects that are currently managed by Core Data. Everytime the user types in a character, I created an instance of a SearchOperation (subclasses NSOperation) that queries Core Data to find results that might match the search. The code in the search controller looks something like: - (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope { // Update the filtered array based on the search text and scope in a secondary thread if ([searchText length] < 3) { [filteredList removeAllObjects]; // First clear the filtered array. [self setFilteredList:NULL]; [self.tableView reloadData]; return; } NSDictionary *searchdict = [NSDictionary dictionaryWithObjectsAndKeys:scope, @"scope", searchText, @"searchText", nil]; [aSearchQueue cancelAllOperations]; SearchOperation *searchOp = [[SearchOperation alloc] initWithDelegate:self dataDict:searchdict]; [aSearchQueue addOperation:searchOp]; } And my search is rather straight forward. SearchOperation is a subclass of NSOperation. I overwrote the main method with the following code: - (void)main { if ([self isCancelled]) { return; } NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@"MyEntity" inManagedObjectContext:managedObjectContext]; NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; [fetchRequest setEntity:entity]; NSPredicate *predicate = NULL; predicate = [NSPredicate predicateWithFormat:@"(someattr contains[cd] %@)", searchText]; [fetchRequest setPredicate:predicate]; NSError *error = NULL; NSArray *fetchResults = [managedObjectContext executeFetchRequest:fetchRequest error:&error]; [fetchRequest release]; if (self.delegate != nil) [self.delegate didFinishSearching:fetchResults]; [pool drain]; } This code works, but it has several issues. It's slow. Even though I have the search happening in a separate thread other than the UI thread, querying 17,000 objects is clearly not optimal. If I'm not careful, crashes can happen. I set the max concurrent searches in my NSOperationQueue to 1 to avoid this. What else can I do to make this search faster? I think preloading all 17,000 objects into memory might be risky. There has to be a smarter way to conduct this search to give results back to the user faster.

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  • Groovy sorting string asc

    - by srinath
    How to sort string names in array on ascending order . I tried sort method but it fails to sort on name basis . def words = ["orange", "blue", "apple", "violet", "green"] I need to achieve like this : ["apple", "blue", "green", "orange", "violet" ] thanks in advance.

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  • Strange declaration(templates). C++

    - by atch
    Hi, guys could anyone explain to my like to a not very inteligent child what is declared here: (this is taken from another post on this forum) template<typename C> static char (&f(ChT<int Fallback::*, &C::x>*))[1]; how I read it is: template of static function f called with (ChT*) but then I can't make sense why is there address of operator and why is there array? When explaining please picture not very inteligent child and then try to make it clear to it. Thanks for any help

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  • Corner Cases, Unexpected and Unusual Matlab

    - by Mikhail
    Over the years, reading others code, I encountered and collected some examples of Matlab syntax which can be at first unusual and counterintuitive. Please, feel free to comment or complement this list. I verified it r2006a. set([], 'Background:Color','red') Matlab is very forgiving sometimes. In this case, setting properties to an array of objects works also with nonsense properties, at least when the array is empty. myArray([1,round(end/2)]) This use of end keyword may seem unclean but is sometimes very handy instead of using length(myArray). any([]) ~= all([]) Surprisigly any([]) returns false and all([]) returns true. And I always thought that all is stronger then any. EDIT: with not empty argument all() returns true for a subset of values for which any() returns true (e.g. truth table). This means that any() false implies all() false. This simple rule is being violated by Matlab with [] as argument. Loren also blogged about it. Select(Range(ExcelComObj)) Procedural style COM object method dispatch. Do not wonder that exist('Select') returns zero! [myString, myCell] Matlab makes in this case an implicit cast of string variable myString to cell type {myString}. It works, also if I would not expect it to do so. [double(1.8), uint8(123)] => 2 123 Another cast example. Everybody would probably expect uint8 value being cast to double but Mathworks have another opinion. a = 5; b = a(); It looks silly but you can call a variable with round brackets. Actually it makes sense because this way you can execute a function given its handle. a = {'aa', 'bb' 'cc', 'dd'}; Surprsisingly this code neither returns a vector nor rises an error but defins matrix, using just code layout. It is probably a relict from ancient times. set(hobj, {'BackgroundColor','ForegroundColor'},{'red','blue'}) This code does what you probably expect it to do. That function set accepts a struct as its second argument is a known fact and makes sense, and this sintax is just a cell2struct away. Equvalence rules are sometimes unexpected at first. For example 'A'==65 returns true (although for C-experts it is self-evident). About which further unexpected/unusual Matlab features are you aware?

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  • GCD function in matlab

    - by SalemFayad
    hi, i am looking for a way to implement the "gcd" function used in matlab in another language but i really cant understand the way it functions. it says in http://www.mathworks.com/access/helpdesk/help/techdoc/ref/gcd.html that: "[G,C,D] = gcd(A,B) returns both the greatest common divisor array G, and the arrays C and D, which satisfy the equation: A(i).*C(i) + B(i).*D(i) = G(i)." but it says nothing about how it calculates C and D. i would be grateful if someone has a clearer idea about this subject! thanks:)

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  • $_SERVER['HTTP_X_REQUESTED_WITH'] seemingly not available on PHP 5.1.6

    - by kenny99
    Hi, I've run into a problem on a server running php 5.1.6 - the code i use to detect ajax requests isn't working as the $_SERVER['HTTP_X_REQUESTED_WITH'] variable is missing from the $_SERVER array. The same code works fine on php 5.2 and in firebug i can see the headers include X-Requested-With XMLHttpRequest. Anyone know any more about this issue and how I can get round it? Thanks in advance.

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  • Show itemRenderer in specific DataGrid rows... others empty

    - by dude22
    I have a DataGrid populated via an Array. The last column in the DataGrid uses an ItemRenderer (Button). I want to show the Button in certain rows but not in others (leave those empty). I've looked everywhere for an example or even a clue how to do this (tried labelFunction on DG, etc.) but can't find anything about it. Any help would be appreciated. Thanks!

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  • plot markers on google maps with json and jquery

    - by mark
    I am trying to plot the markers as defined in a json file om Google Maps but they don't show on the map. Can somebody help me with this problem? This is the Json file: http://sionvalais.com/gmap/markers/ This is the Javascritp function: function loadMarkers() { var bounds = map.getBounds(); var zoomLevel = map.getZoom(); $.post("/gmaps/markers/index.php", {zoom: zoomLevel, swLat: bounds.getSouthWest().lat(), swLon: bounds.getSouthWest().lng(), neLat: bounds.getNorthEast().lat(), neLon: bounds.getNorthEast().lng()}, function(data) { processMarkers(data, _smallMarkerSize); }, "json" ); } function processMarkers(webcams, markerSize) { var marker = null; var markersInView = new Array(); var idsInView = new Array(); // Loop through the new webcams for (var i = 0; i < webcams.length; i++) { var idx = markers.indexOf(webcams[i].id); if (idx == -1) { var info_html = "<table class='infowindow'>"; info_html += "<tr><td class='img'>"; info_html += "<img src='" + webcams[i].smallimg + "' /><td>"; info_html += "<td><p><b>" + webcams[i].loc + "</b>"; info_html += "<br /><a href='/webcam/" + webcams[i].url + "' target='_blank'>Show webcam</a></p></td></tr>"; info_html += "</table>"; marker = new WebcamMarker(new GLatLng(webcams[i].latitude, webcams[i].longitude), {image: "" + webcams[i].smallimg + "", height: markerSize, width: markerSize}); marker.myhtml = info_html; map.addOverlay(marker); markersInView[webcams[i].id] = marker; } else { markersInView[webcams[i].id] = markers[webcams[i].id]; } idsInView.push(webcams[i].id); } // Now remove the markers outside of the viewport for (var i = 0; i < webcamids.length; i++) { var idx = markersInView.indexOf(webcamids[i]); if (idx == -1) { marker = markers[webcamids[i]]; map.removeOverlay(marker); } } markers = markersInView; webcamids = idsInView; }

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  • sqlite3_prepare_v2 throws SQLITE_ERROR in iPhone code

    - by incognitii
    I have a piece of code that used to work, and other iterations of it that DO work within the same app, and have compared code, and they are identical in structure. This is driving me INSANE!!!!!! In this instance, sqlite3_prepare_v2 is throwing one of those useless SQLITE_ERROR exceptions. Apparently, it can FIND the database, and OPEN the database, but it can't prepare a statement for it. Does ANYONE have any ideas? I'm desperate here. second_maindatabaseName = @"database.db"; NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDir = [documentPaths objectAtIndex:0]; second_maindatabasePath = [documentsDir stringByAppendingPathComponent:second_maindatabaseName]; // Setup the database object sqlite3 *database; // Init the entry requirements Array BOOL success; NSFileManager *fileManager = [NSFileManager defaultManager]; success = [fileManager fileExistsAtPath:second_maindatabasePath]; if(!success) { NSString *databasePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:second_maindatabaseName]; [fileManager copyItemAtPath:databasePathFromApp toPath:second_maindatabasePath error:nil]; [fileManager release]; } if(sqlite3_open([second_maindatabasePath UTF8String], &database) == SQLITE_OK) { NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; value1 = [defaults stringForKey:kConst1]; value2 = [defaults stringForKey:kConst2]; value3 = [defaults stringForKey:kConst3]; value4 = [defaults stringForKey:kConst4]; const char *sqlStatement = "SELECT * FROM myTable WHERE Field1 = ? AND Field2 = ? AND Field3 = ? AND Field4 = ?"; sqlite3_stmt *compiledStatement; int error_code = sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL); if(error_code == SQLITE_OK) { // Loop through the results and add them to the feeds array sqlite3_bind_text(compiledStatement,1,[value1 UTF8String],-1,SQLITE_TRANSIENT); sqlite3_bind_text(compiledStatement,2,[value2 UTF8String],-1,SQLITE_TRANSIENT); sqlite3_bind_text(compiledStatement,3,[value3 UTF8String],-1,SQLITE_TRANSIENT); sqlite3_bind_text(compiledStatement,4,[value4 UTF8String],-1,SQLITE_TRANSIENT); while(sqlite3_step(compiledStatement) == SQLITE_ROW) { // Read the data from the result row NSString *aNewValue = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 1)]; } } sqlite3_finalize(compiledStatement); } sqlite3_close(database);

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  • Zend_Paginator - Increase querys

    - by poru
    Hello, I started using Zend_Paginator, it works everything fine but I noticed that there is one more query which slows the load time down. The additional query: SELECT COUNT(1) AS `zend_paginator_row_count` FROM `content` The normal query: SELECT `content`.`id`, `content`.`name` FROM `content` LIMIT 2 PHP: $adapter = new Zend_Paginator_Adapter_DbSelect($table->select()->from($table, array('id', 'name'))); $paginator = new Zend_Paginator($adapter); Could I merge the two querys into one (for better performance)?

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  • How to break this string and sort on version number

    - by Sean P
    I have an ASP app that has a string array as such (there are much more than this): 7.5.0.17 Date: 05_03_10 7.5.0.18 Date: 05_03_10 7.5.0.19 Date: 05_04_10 7.5.0.2 Date: 02_19_10 7.5.0.20 Date: 05_06_10 7.5.0.3 Date: 02_26_10 7.5.0.4 Date: 03_02_10 7.5.0.5 Date: 03_08_10 7.5.0.6 Date: 03_12_10 7.5.0.7 Date: 03_19_10 7.5.0.8 Date: 03_25_10 7.5.0.9 Date: 03_26_10 7.5.1.0 Date: 05_06_10 How do I go about sorting these string by version descending?

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  • Jquery Ajax Call In For Loop Only Runs Once - Possible Issue with Timing & Exit Condition?

    - by Grumps
    Background I'm building a form that uses autocomplete against the EchoNest API. First the users picks an artist, using the Artist Suggest call. Next they select a song but the Song and/Or Artist song search doesn't provide a "wild card" search. It only returns exact matches. So based on the forums they suggest building an array of the songs and using auto complete on the array. I can only get a maximum of 100 responses at a time. I do know based on the initial response the number of songs. My Plan: Wrap the ajax call in a for loop ('runonceloop'). Amend the loop exit condition after the first response with the total number of songs. Challenge I'm having: The 'runonceloop' only completes a singe loop because or at least that's what I believe: The exit condition is satisfied before the first response [1] is received. I've tried to adjust the 'exit condition' and 'counter' such that they are set and and increased at the end of the success block. This seems to lock up my browser. Can someone provide some guidance on this situation?[2] I'd really appreciate it. I also don't think turning async off is a good idea because it locks the browser. Response[1]: { "response": { "status": { "code": "0", "message": "Success", "version": "4.2" }, "start": 0, "total": 121, //Used for "songs": [ { "id": "SOXZYYG127F3E1B7A2", "title": "Karma police" }, { "id": "SOXZABD127F3E1B7A2", "title" : "Creep" } ] } } } Code[2] var songsList = []; function getSongs() { var numsongs = 2; //at least 2 runs. var startindex = 0; runonceloop: //<~~~~Referenced in question for (var j = 0;j >= numsongs;) { console.log('numsongs' + numsongs); $.ajax({ url: "http://developer.echonest.com/api/v4/artist/songs", dataType: "jsonp", data: { results: 100, api_key: "XXXXXXXXXXX", format: "jsonp", name: $("#artist").val(), start: startindex }, success: function (data) { var songs = data.response.songs; numsongs = data.response.total; //modify exit condition for (var i = 0; i < songs.length; i++) { songsList.push(songs[i].title); } j +=100;// increase by 100 to match number of responses. } }); }};

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  • Bassistance Autocomplete Plugin - Search Page Replacement

    - by Dante
    Hi, i've setup an autocomplete field that searches my database which works fine: $("#autocomplete input#lookupAccount").autocomplete("lib/php/autocomplete_backend.php", { width: 300, selectFirst: false, delay: 250 }); When a user clicks on a result I want to refer them to another page depending on what they've been clicking. In the documentation I find the following: Search Page Replacement An autocomplete plugin can be used to search for a term and redirect to a page associated with a resulting item. The following is one way to achieve the redirect: var data = [ {text:'Link A', url:'/page1'}, {text:'Link B', url: '/page2'} ]; $("...").autocomplete(data, { formatItem: function(item) { return item.text; } }).result(function(event, item) { location.href = item.url; }); So i need to return the following from my PHP file : {text:'link A', url:'/page1'},... But my PHP file now returns $returnData = "<ul>"; if(isset($results)){ for($j=0; $j < count($results); $j++){ if($results[$j][0] == "account"){ if($j % 2){ $returnData .= "<li>".$results[$j][1]."<br /><i>".$results[$j][2].", ".$results[$j][3]." ".$results[$j][4]."</i></li>"; } else { $returnData .= "<li style=\"background: blue\">".$results[$j][1]."<br /><i>".$results[$j][2].", ".$results[$j][3]." ".$results[$j][4]."</i></li>"; } } else { $returnData .= "<li style=\"background: yellow\"><i>".$results[$j][1]."</i> (".$results[$j][2].")</li>"; } } $returnData .= "</ul>"; echo $returnData; } else { echo "Sorry geen resultaten!"; } So it loops through an array and returns an li value depending on what it finds in the array. How can I match that with: {text:'link A', url:'/page1'}???

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