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Articles indexed in June 2010

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  • How to use interfaces in exception handling

    - by vikp
    Hi, I'm working on the exception handling layer for my application. I have read few articles on interfaces and generics. I have used inheritance before quite a lot and I'm comfortable with in that area. I have a very brief design that I'm going to implement: public interface IMyExceptionLogger { public void LogException(); // Helper methods for writing into files,db, xml } I'm slightly confused what I should be doing next. public class FooClass: IMyExceptionLogger { // Fields // Constructors } Should I implement LogException() method within FooClass? If yes, than I'm struggling to see how I'm better of using an interface instead of the concrete class... I have a variety of classes that will make a use of that interface, but I don't want to write an implementation of that interface within each class. In the same time If I implement an interface in one class, and then use that class in different layers of the application I will be still using concrete classes instead of interfaces, which is a bad OO design... I hope this makes sense. Any feedback and suggestions are welcome. Please notice that I'm not interested in using net4log or its competitors because I'm doing this to learn. Thank you Edit: Wrote some more code. So I will implement variety of loggers with this interface, i.e. DBExceptionLogger, CSVExceptionLogger, XMLExceptionLogger etc. Than I will still end up with concrete classes that I will have to use in different layers of my application.

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  • How can I perform an idiomatic non-recursive flatten in ruby?

    - by nasmorn
    I have a method that returns an array of arrays. For convenience I use collect on a collection to gather them together. arr = collection.collect {|item| item.get_array_of_arrays} Now I would like to have a single array that contains all the arrays. Of course I can loop over the array and use the + operator to do that. newarr = [] arr.each {|item| newarr += item} But this is kind of ugly, is there a better way?

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  • jQuery: form input values turns up undefined

    - by Seerumi
    Having problem with this bit of code qith jQuery. it should pick the values from current form and then submit them, but when I try to get them with jQuery they always turn up undefined. I know the SQL results are fine since they show correctly in HTML table, so it must be my inferior javascript skills. New with jQuery and I'm at loss :( PHP/HTML: echo "<table>\n" while ($row = odbc_fetch_array($query)) { echo "<form class='catForm'>\n"; echo "<input type=hidden class='catID' name='catID' value='".$row['running_id']."'/>\n"; echo "<tr>\n"; echo "<td>".$row['running_id']."</td>\n"; echo "<td>".$row['site_id']."</td>\n"; echo "<td>".$row['main_category']."</td>\n"; echo "<td>".$row['map_name']."</td>\n"; echo "<td><input type=textfield class='bCatID' value='".$row['mapping_id']."' size=6/></td>\n"; echo "<td><input type=submit class='saveCat' value='Save'/></td>\n"; echo "<td><input type=submit class='killCat' value='Delete' /></td>\n"; echo "</tr>\n"; echo "</form>\n"; } echo "</table>"; jQuery: $(".catForm").submit(function () { var id = $(this).find('.catID').val(); var bCatID = $(this).find('.bCatID').val(); var dataString = 'id='+id+'&bCatID='+bCatID; $.ajax({ type: "POST", url: 'adminUI/bin/updateSCategories.php', dataType : 'json', data: dataString, success: function(data) { if (data.error == true) $('.failure').html("Error, save failed.").show().fadeOut(2000); if (data.error == false) $('.success').html("Saved succesfully").show().fadeOut(2000); }, error: function(XMLHttpRequest, textStatus, errorThrown) { $('.failure').html("Error, save failed.").show().fadeOut(2000); } }); return false; }); RESULT: id: undefined bCatID: undefined

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  • La RC de Rails 3 repoussée au 11 juin et premières infos sur la version 3.1 du framework

    Mise à jour du 09/06/10 La RC de Rails 3 repoussée au 11 juin Et premières infos sur la version 3.1 du framework La RC du framework était attendue pour hier. Mais c'est une quatrième beta qui a fait son apparition. Des retards de dernières minutes ont empêché Rails 3 de sortir pendant la RailsConf qui se déroule actuellement à Baltimore, objectif initialement prévu par l'équipe de développement. Le fondateur du framework, David Heinemeier Hansson, reste cependant confiant puisque la RC devrait finalement arriver ce vendredi 11. Pour mémoire Rails 3 marque une avancée majeure pour la technologie. Cette ver...

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  • Animation in Silverlight

    In this chapter you will be learning the basic fundamental concepts of Animations in Silverlight Application, which includes Animation Types, namespace details, classes, objects used, implementation of different types of animations with XAML and with C# code and some more interesting samples for each animation.

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  • Steps to integrate Paypal payments pro without SSL

    - by Nicolas
    Hi, We are looking to integrate Paypal payments in order to "spotlight" (or feature) ads and people on our website, but we do not want to use SSL. Here's the process I would like to set up: User click on "I want my ad/profile to be spotlighted" Description page of what he's going to pay Click on payment button Redirected to paypal (can we customise the page layout?) Paypal process, during which paypal notifies us when the payment's done and ok Once done, user's redirected to a page on our website (PHP) We already own a Paypal payment pro account Any help on how to do all these steps is appreciated, although steps 1,2,3 and 6 is likely to be up to me to setup. Cheers, Nicolas.

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  • c++ repaint window

    - by stefan
    i got a window with an image in it. but when its a little picture i first need to resize the window before i can see it, the screen doesnt refresh/repaint. how can i fix this?

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  • Does Iphone supports background process or services?

    - by Fedrick
    Hi all, I am planning to develop a iphone client application to upload images from iphone gallery to amazon s3 using rest calls.so is there any library to run this application as a background process in iphone. Also is there any library to access the iphone photo gallery(Should be able access all the images,not only selected one like in UIImagePickerController) Thanks in advance for stack overflow masters for sharing their knowledge.....

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  • Find node level in a tree

    - by Álvaro G. Vicario
    I have a tree (nested categories) stored as follows: CREATE TABLE `category` ( `category_id` int(10) unsigned NOT NULL AUTO_INCREMENT, `category_name` varchar(100) NOT NULL, `parent_id` int(10) unsigned DEFAULT NULL, PRIMARY KEY (`category_id`), UNIQUE KEY `category_name_UNIQUE` (`category_name`,`parent_id`), KEY `fk_category_category1` (`parent_id`,`category_id`), CONSTRAINT `fk_category_category1` FOREIGN KEY (`parent_id`) REFERENCES `category` (`category_id`) ON DELETE SET NULL ON UPDATE CASCADE ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_spanish_ci I need to feed my client-side language (PHP) with node information (child+parent) so it can build the tree in memory. I can tweak my PHP code but I think the operation would be way simpler if I could just retrieve the rows in such an order that all parents come before their children. I could do that if I knew the level for each node: SELECT category_id, category_name, parent_id FROM category ORDER BY level -- No `level` column so far :( Can you think of a way (view, stored routine or whatever...) to calculate the node level? I guess it's okay if it's not real-time and I need to recalculate it on node modification.

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  • Importing Variables from PHP 4 into Flash

    - by Glenn
    I'm trying to get variable importing from a PHP script before I implement it into a larger project. So far all I've gotten is headaches. //this is all thats in test.php other than the open and close brackets. Normally I'd have it doing a mysql_query and putting useful information into the print statement. print( "lamegame.net/test/test.php?val=foo&id=0000&name=Glenn"); All test.as has to do is access the three variables. The problem comes in that 'val' is undefined. The id and name variables however are just fine and return 0000 and Glenn respectively. package { import flash.display.MovieClip; import flash.text.TextField; import flash.events.; import flash.net.; public class test extends MovieClip { public function test() { super(); //prep request var request:URLRequest = new URLRequest("test.php"); request.method = URLRequestMethod.GET; var loader:URLLoader = new URLLoader(); //load request loader.dataFormat = URLLoaderDataFormat.VARIABLES; loader.addEventListener(Event.COMPLETE, dataLoaded); loader.load(request); } public function dataLoaded(e:Event):void { var name = e.target.data.name; var id = e.target.data.id; var val = e.target.data.val; trace("Val: " + val + "ID: " + id + " Name: " + name); } } }

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  • Connecting to an RMI object without registry

    - by Mark Probst
    I think I need to connect to a remote RMI object without going through the registry, but I don't know how. My situation is this: I'm implementing a simple job distribution service which consists of one distributor and multiple workers. The distributor has a registered RMI object to which clients connect to send jobs, and workers connect to accept jobs. Unfortunately the distributor and worker hosts are behind a firewall. To get to the distributor host I am tunneling two ports (one for the registry, one for the distributor object) via SSH, so I can get to the registry and the distributor from outside the firewall. To make that work I have to set "-Djava.rmi.server.hostname=localhost" on the distributor JVM so that the clients connect to their local, tunneled port, instead of the port on the actual distributor host, which is blocked. This creates a problem for the workers, though, because they need to connect to the distributor directly, but because of the "localhost" redirection they behave like clients and try to connect to a port on their own host, which is not available, because I'm not tunneling on the workers (it is impractical). Now, if I could connect to a remote object directly by giving the hostname and port, I could do away both with the registry on the distributor and the "localhost" hack, and make the workers connect properly. How do I do that? Or is there a different solution to this problem?

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  • Pass arguments when using the File protocol

    - by Ando
    I found this question being asked on several places on the internet (including the File protocol MSDN page) but no clear answer. So, if I am calling my application like this: file://c:\myapp.exe is there any way to pass it some command line arguments, like /nospashscreen=true Things I've tried: file://c:\myapp.exe?/nospashscreen=true - launches the app, but with no command line arguments :( Thanks in advance.

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  • How to check for a file's authenticity ?

    - by Ale_x
    Let's say I write a game application. I want the level of the player to be stored in an external file. How can I prevent a hacker from writing and modifying the file to put another level ? I want the file to be modified by my application only. I can sign the file's content with a key, but then this key will be stored in the application, therefore it would be possible for a hacker to decompile the binary and find the key. Is there any way to do this ?

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  • How to get progress bar to time Class exectution

    - by chrissygormley
    Hello, I am trying to use progress bar to show the progress of a script. I want it increase progress after every function in a class is executed. The code I have tried is below: import progressbar from time import sleep class hello(): def no(self): print 'hello!' def yes(self): print 'No!!!!!!' def pro(): bar = progressbar.ProgressBar(widgets=[progressbar.Bar('=', '[', ']'), ' ', progressbar.Percentage()]) for i in Yep(): bar.update(Yep.i()) sleep(0.1) bar.finish() if __name__ == "__main__": Yep = hello() pro() Does anyone know how to get this working. Thanks

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  • How to get attribute value using SelectSingleNode in C#?

    - by Nano HE
    Hello. I am parsing a xml document, I need find out the gid (an attribute) value (3810). Based on SelectSingleNode(). I found it is not easy to find the attribute name and it's value. Can I use this method or I must switch to other way. Attached my code. How can I use book obj to get the attribute value3810 for gid. Thank you. My test.xml file as below <?xml version="1.0"?> <root> <VersionInfo date="2007-11-28" version="1.0.0.2"/> <Attributes> <AttrDir name="EFEM" DirID="1"> <AttrDir name="Aligner" DirID="2"> <AttrDir name="SequenceID" DirID="3"> <AttrObj text="Slot01" gid="3810" unit="" scale="1"/> <AttrObjCount value="1"/> </AttrDir> </AttrDir> </AttrDir> </Attributes> </root> I wrote the test.cs as below public class Sample { public static void Main() { XmlDocument doc = new XmlDocument(); doc.Load("test.xml"); XmlNode book; XmlNode root = doc.DocumentElement; book = root.SelectSingleNode("Attributes[AttrDir[@name='EFEM']/AttrDir[@name='Aligner']/AttrDir[@name='SequenceID']/AttrObj[@text='Slot01']]"); Console.WriteLine("Display the modified XML document...."); doc.Save(Console.Out); } }

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  • Google Spreadsheet API problem: memory exceeded

    - by Robbert
    Hi guys, Don't know if anyone has experience with the Google Spreadsheets API or the Zend_GData classes but it's worth a go: When I try to insert a value in a 750 row spreadsheet, it takes ages and then throws an error that my memory limit (which is 128 MB!) was exceeded. I also got this when querying all records of this spreadsheet but this I can imaging because it's quite a lot of data. But why does this happen when inserting a row? That's not too complex, is it? Here's the code I used: public function insertIntoSpreadsheet($username, $password, $spreadSheetId, $data = array()) { $service = Zend_Gdata_Spreadsheets::AUTH_SERVICE_NAME; $client = Zend_Gdata_ClientLogin::getHttpClient($username, $password, $service); $client->setConfig(array( 'timeout' => 240 )); $service = new Zend_Gdata_Spreadsheets($client); if (count($data) == 0) { die("No valid data"); } try { $newEntry = $service->insertRow($data, $spreadSheetId); return true; } catch (Exception $e) { return false; } }

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  • insert with many to many relationship

    - by Luca Romagnoli
    hi, i have 2 object: user, group that have a relationship many to many i want create a user and associate some groups to it. How can i do it? thanks I've tried with this. but it's wrong: user = new User(); List<int> gruppi = new List<int>() {1,2}; utente.Group =db.Group.Where(p => gruppi.Contains(p.GruppoID)

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  • Is there any sync services library for iphone

    - by Fedrick
    Hi all, i am developing a mobile client to sync images from iphone photo gallery to amazon s3,so is there any sync services libraries that can help me in this regard.. Also is there any library to access the iphone photo gallery,I just wanted to pick all photos, randomly, from the images stored on the device with no user interaction? Thanks in advance.......

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  • Is there a Joomla Plugin for Aptana IDE ?

    - by google
    I use Aptana for 2 or 3 months now and i'm very happy with it. But since i need to work with Joomla! and to write some modules, compenents, etc... I'd have like to know if there is a joomla plugin for Aptana ? I would just like to have autocompletion, autosuggest, links to methods and class of the Joomla API Any ideas ? Thanks

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  • Open plan office annoyance

    - by arturito
    Not a technical question, but related to IT. At the moment I work in the open plan office and the guy next to me is talking to himself while programming. It annoys my collegue and me so much that we are putting the earphones on with music volume set to max. Does anyone know good and polite solution to shut him up?

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