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  • class foo; in header file

    - by Thomas
    Hi, Is some one able to explain why header files have something like this? class foo; // This here? class bar { bar(); }; Do you need an include statement when using this? Thanks.

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  • JavaScript tags, performance and W3C

    - by Thomas
    Today I was looking for website optimization content and I found an article talking about move JavaScript scripts to the bottom of the HTML page. Is this valid with W3C's recommendations? I learned that all JavaScript must be inside of head tag... Thank you.

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  • How can my facebook application post message to a wall?

    - by Thomas Dekiere
    i already found out how to post something to a wall with the graph api on behalf of the facebook user. But now i want to post something in the name of my application. Here is how i'm trying to do this: protected void btn_submit_Click(object sender, EventArgs e) { Dictionary<string, string> data = new Dictionary<string, string>(); data.Add("message", "Testing"); // i'll add more data later here (picture, link, ...) data.Add("access_token", FbGraphApi.getAppToken()); FbGraphApi.postOnWall(ConfigSettings.getFbPageId(), data); } FbGraphApi.getAppToken() // ... private static string graphUrl = "https://graph.facebook.com"; //... public static string getAppToken() { MyWebRequest req = new MyWebRequest(graphUrl + "/" + "oauth/access_token?type=client_cred&client_id=" + ConfigSettings.getAppID() + "&client_secret=" + ConfigSettings.getAppSecret(), "GET"); return req.GetResponse().Split('=')[1]; } FbGraphApi.postOnWall() public static void postOnWall(string id, Dictionary<string,string> args) { call(id, "feed", args); } FbGraphApi.call() private static void call(string id, string method, Dictionary<string,string> args ) { string data = ""; foreach (KeyValuePair<string, string> arg in args) { data += arg.Key + "=" + arg.Value + "&"; } MyWebRequest req = new MyWebRequest(graphUrl +"/" + id + "/" + method, "POST", data.Substring(0, data.Length - 1)); req.GetResponse(); // here i get: "The remote server returned an error: (403) Forbidden." } Does anyone see where this i going wrong? I'm really stuck on this. Thanks!

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  • Cannot set focus on input field in infoWindow

    - by thomas
    Hi Why is focus not set to noteTitle? I am using google maps API V3. The getNoteForm() returns a input field "noteTitle". The $("#noteTitle").focus() works fine when executed in firebug. I call this function when clicking on the map: function setNewNoteInfowindow(latlng) { if (geocoder) { geocoder.geocode({'latLng': latlng}, function(results, status) { var address = ""; if (status == google.maps.GeocoderStatus.OK) { if (results[1]) { address = results[1].formatted_address; } } newNoteInfowindow = new google.maps.InfoWindow({ content: getNoteForm(latlng, address), size: new google.maps.Size(40,50) }); newNoteInfowindow.open(map, newNoteMarker); google.maps.event.addListener(newNoteInfowindow, 'domready', function() { $("#noteTitle").focus(); }); google.maps.event.addListener(newNoteInfowindow, 'closeclick', function() { newNoteMarker.setVisible(false); }); }); } }

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  • How do you hook a C++ compiled dll function to a sql database?

    - by Thomas
    I want to do something like: lastName SIMILARTO(lastName, 'Schwarseneger', 2) where lastName is the field in the database, 'Schwarseneger' is the value that lastName field is being compared to and 2 is the maximum number of characters (edit distance) that can differ between the lastName field, and the entered value. I can implement the SIMILARTO function in C++ using the Levenshtein distance (http://en.wikipedia.org/wiki/Levenshtein_distance), but how do hook the function in a dll to a mySQL implementation?

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  • Append message to JBoss Console using jboss-log4j.xml

    - by Random Joe
    I'm unable to append messages from my application to the JBoss console. The following are the changes that I made to the jboss-log4j.xml configuration file: <category name="com.tricubes"> <priority value="INFO"/> <appender-ref ref="CONSOLE"/> </category> Here is my code: public class OneToOneValidation2 { private static final Logger logger = Logger.getLogger("com.tricubes"); public boolean validate(byte[] fpImage, byte[] fpTemplate, String desc, String ticket) { ... logger.info("BES INFO: SOCKET MSG SENT " + intToByteArray(x)); ... return b; } } What am I missing? TIA!

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  • Using Maven for project distribution

    - by Thomas
    I have an Project that I distribute by sending out large packages. I'd like to know if there is a user friendly way of using Maven to distribute updates of the project? I'd need something like what is done for updating softwares like Firefox or Acrobat Reader. Check a respository, warn user of an update, download and reconfigure. All within a simple and friendly interface. Alternative open source java projects are welcome.

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  • RAII: Initializing data member in const method

    - by Thomas Matthews
    In RAII, resources are not initialized until they are accessed. However, many access methods are declared constant. I need to call a mutable (non-const) function to initialize a data member. Example: Loading from a data base struct MyClass { int get_value(void) const; private: void load_from_database(void); // Loads the data member from database. int m_value; }; int MyClass :: get_value(void) const { static bool value_initialized(false); if (!value_initialized) { // The compiler complains about this call because // the method is non-const and called from a const // method. load_from_database(); } return m_value; } My primitive solution is to declare the data member as mutable. I would rather not do this, because it suggests that other methods can change the member. How would I cast the load_from_database() statement to get rid of the compiler errors?

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  • Setting jvmargs in log4j.properties file

    - by Thomas
    Hey This is a bit of a weird request but I am trying to set some jvmargs in the log4j.properties file. At present I use ant to for example set some args.... jvmarg value="-Dmail.smtp.socketFactory.port=465" ... but it would be great to group a few of these logging relevant arguments into the .properties file. Does anyone know how to do this? Thanks in advance!

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  • Get ViewData IList back on postback in ASP.NET MVC

    - by Thomas
    I have the following in my view: <%using (Html.BeginForm()) {%> <% foreach (var item in Model.Cart) { %> <div> <%= Html.TextBox("Cart.Quantity", item.Quantity, new { maxlength = "2" })%> <%= Html.Hidden("Cart.ItemID", item.ItemID)%> </div> <% } %> <input name="update" type="image" src="image.gif" /> <% } % I then have this code in my controller: public ActionResult Index() { CartViewData cartViewData = new CartViewData(); IList<Item> items = ItemManager.GetItems(); cartViewData.Cart = items; return View("Index", cartViewData); } [AcceptVerbs(HttpVerbs.Post)] public ActionResult Index(CartViewData cartViewData) { // cartviewData is null } Is there a way to grab the List on the postback to see if the values in the textboxes have changed? Thanks Below is a simplified example since it was requested: <% for (int i = 0; i < Model.Cart.Count; i++ ) { %> <a href="javascript:void(0);" onclick="removeItem(<%= Model.Cart[i].ShoppingCartItemID %>);">Remove</a> <% } %> Hope this helps.

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  • Set two classes from array

    - by Thomas
    I want to change the classes on every third output from a query: <?php $style_classes = array('box','box','box no_right_margin'); $style_index = 0; ?> I set this on the div: <div <?php $k = $style_index%4; echo "class=$style_classes[$k]"; $style_index++; ?>> On the third div I want the class to look like this: <div class="box no_right_margin"> Right now it looks like: <div class="box" no_right_margin>

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  • Can any JavaScript library perform as well as the Cut The Rope JavaScript implementation?

    - by joe
    Now that the canvas tag is starting to get hardware execration [acceleration - thanks guys!] by many browsers, developing casual games in HTML5 is becoming more feasible. ZeptoLabs did a great job porting Cut The Rope to HTML5 for use as a Windows 8 Metro App. You can find some of the details here but they do not get into specifics. I was wondering if anyone knew if they used a library (such as Impact or Crafty) or if you need to write all custom and optimized JavaScript code in order to get this type of performance. Thanks!

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  • How can I display image and text within one AS3 datagrid?

    - by Thomas
    The following page shows how to load external images in AS3 DataGrid: http://www.adobe.com/devnet/flash/quickstart/datagrid_pt3/ (image and text are displayed in two columns) But I wonder how the image and text can be loaded together within the same DataGrid. Within one column: Image followed by the text. I cannot get it work so I'd be grateful for any help with examples. Thanks

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  • Class template specializations with shared functionality

    - by Thomas
    I'm writing a simple maths library with a template vector type: template<typename T, size_t N> class Vector { public: Vector<T, N> &operator+=(Vector<T, N> const &other); // ... more operators, functions ... }; Now I want some additional functionality specifically for some of these. Let's say I want functions x() and y() on Vector<T, 2> to access particular coordinates. I could create a partial specialization for this: template<typename T> class Vector<T, 3> { public: Vector<T, 3> &operator+=(Vector<T, 3> const &other); // ... and again all the operators and functions ... T x() const; T y() const; }; But now I'm repeating everything that already existed in the generic template. I could also use inheritance. Renaming the generic template to VectorBase, I could do this: template<typename T, size_t N> class Vector : public VectorBase<T, N> { }; template<typename T> class Vector<T, 3> : public VectorBase<T, 3> { public: T x() const; T y() const; }; However, now the problem is that all operators are defined on VectorBase, so they return VectorBase instances. These cannot be assigned to Vector variables: Vector<float, 3> v; Vector<float, 3> w; w = 5 * v; // error: no conversion from VectorBase<float, 3> to Vector<float, 3> I could give Vector an implicit conversion constructor to make this possible: template<typename T, size_t N> class Vector : public VectorBase<T, N> { public: Vector(VectorBase<T, N> const &other); }; However, now I'm converting from Vector to VectorBase and back again. Even though the types are the same in memory, and the compiler might optimize all this away, it feels clunky and I don't really like to have potential run-time overhead for what is essentially a compile-time problem. Is there any other way to solve this?

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  • how to dynamically break NHibernation cascade

    - by Joe Black
    The NHibernate cascade setting in the entity mapping is static. Is there anyway to dynamically disable the "cascade" setting in code to avoid expensive cascade operation in NHiberate during a bulky data transaction? We do not want to use stored procedures or native SQL because we need to have the entity changes captured by NHibernate (audit).

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  • Memory efficient collection class

    - by Joe
    I'm building an array of dictionaries (called keys) in my iphone application to hold the section names and row counts for a tableview. the code looks like this: [self.results removeAllObjects]; [self.keys removeAllObjects]; NSUInteger i,j = 0; NSString *key = [NSString string]; NSString *prevKey = [NSString string]; if ([self.allResults count] > 0) { prevKey = [NSString stringWithString:[[[self.allResults objectAtIndex:0] valueForKey:@"name"] substringToIndex:1]]; for (NSDictionary *theDict in self.allResults) { key = [NSString stringWithString:[[theDict valueForKey:@"name"] substringToIndex:1]]; if (![key isEqualToString:prevKey]) { NSDictionary *newDictionary = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithInt:i],@"count", prevKey,@"section", [NSNumber numberWithInt:j], @"total",nil]; [self.keys addObject:newDictionary]; prevKey = [NSString stringWithString:key]; i = 1; } else { i++; } j++; } NSDictionary *newDictionary = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithInt:i],@"count", prevKey,@"section", [NSNumber numberWithInt:j], @"total",nil]; [self.keys addObject:newDictionary]; } [self.tableview reloadData]; The code works fine first time through but I sometimes have to rebuild the entire table so I redo this code which orks fine on the simulator, but on my device the program bombs when I execute the reloadData line : malloc: *** mmap(size=3772944384) failed (error code=12) *** error: can't allocate region *** set a breakpoint in malloc_error_break to debug malloc: *** mmap(size=3772944384) failed (error code=12) *** error: can't allocate region *** set a breakpoint in malloc_error_break to debug Program received signal: “EXC_BAD_ACCESS”. If I remove the reloadData line the code works on the device. I'm wondering if this is something to do with the way I've built the keys array (ie using autoreleased strings and dictionaries).

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  • Create a callback function within a custom jQuery function

    - by Thomas
    I'm not sure how to approach this as I am fairly new to jQuery. I'm wanting to create a callback function within a custom function. Here's my example: function doSomething() { var output = 'output here'; // Do something here // This is where I want to create the callback function and pass output as a parameter } I want the callback function to be accessible by any number of scripts (e.g. more than one script can access this callback). This function (doSomething) is not part of a plugin but rather part of another callback function itself. I've also created a var within the function and want to pass that through the callback function as well. How can I do this?

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  • How does Maven find a Artifact in a remote repository?

    - by Thomas
    I'm trying to create a maven plugin to generate a file with the URL to all the dependencies in a project. I have been able to get the dependencies and their artifact, but I'm having trouble getting the download URL. Using ArtifactResolver and ArticateMetadataSource I get some of the artifact information. However I fail to get all the information for all the dependencies. I haven't been able to find documentation on the resolution logic, so that I can call it form my plugin. I can use an ArtifactResolver to download the artifact, but what I really wanted was just the URL. The Maven Artifact API has a a method called getDownloadURL (see http://maven.apache.org/ref/2.0.4/maven-artifact/apidocs/org/apache/maven/artifact/Artifact.html). However I cant seem to find a way to get a real value into it. I always get a null value. Is there a way to have it resolved (downloading or not) and get the URL for where the file came from?

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  • Is Microsoft's Ribbon UI really that great, from a usability perspective?

    - by Thomas Owens
    The first time I ever used it was at my current job. Among my coworkers, the feelings toward it for usability are mixed. The other developer doesn't really care one way or the other, as long as Office does everything he needs it to do when writing reports. The top manager likes it because it feels natural, and I feel the same way. But another coworker finds in klunky and hard to use (although she admits that she only uses it at home as her machine hasn't been upgraded yet, and that might change if she uses it more often at work). So - is the Ribbon UI really that innovative? What qualities about it make it a good or bad user interface mechanism? Possibly related: Adoption of the Ribbon UI

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  • Passing values from action class to model class in symfony

    - by THOmas
    I have a action class for saving some data to a database.In action class iam getting a id through url.I have to save the id in table. I am getting the id by $request-getParameter('id') I used this code for saving $this-form-bind($request-getParameter('question_answers')); if ($this-form-isValid()) { $this-form-save(); $this-redirect('@homepage'); } in model class i used a override save method to save extra field public function save(Doctrine_Connection $conn = null) { if ($this-isNew()) { $now=date('Y-m-d H:i:s', time()); $this->setPostedAt($now); } return parent::save($conn); so i want to get the id value here . So how can i pass id value from action class to model class is any-other way to save the id in action class itself Thanks in advance

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  • Why the macros in Objective-C / Cocoa?

    - by Joe
    I'm coming from a place without macros (Java/Python/C#/Scala) so perhaps my perspective is distorted but... Why are macros used in Cocoa? Two that spring to mind are NSLocalizedString and NSAssert (and STAssert). Would it be so hard / unsuitable to make them functions (which could be inlined)? I suppose I find them a little bizarre as an unnecessary throw-back to C (and yes, I am familiar with the pedigree of Obj-C). Is it just something that was done back in the day or is there a specific reason?

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