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  • Java-Swing: Change getSource() in ActionListener

    - by Brandon
    I have a class that contains a JButton. This can't be changed. The problem is this: The actionListener calls getSource() and gets the JButton, not the container class. Can I change what getSource retrieves, before the actionListener is added? OR can JButtons have a variable reference to its container? I can't make a class extend a JButton. It caused bugs for drawing purposes... story of my week.

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  • How to import classes into other classes within the same file in Python

    - by Chris
    I have the file below and it is part of a django project called projectmanager, this file is projectmanager/projects/models.py . Whenever I use the python interpreter to import a Project just to test the functionality i get a name error for line 8 that FileRepo() cannot be found. How Can I import these classes correctly? Ideally what I am looking for is each Project to contain multiple FileRepos which each contain and unknown number of files. Thanks for any assistance in advance. #imports from django.db import models from django.contrib import admin #Project is responsible for ensuring that each project contains all of the folders and file storage #mechanisms a project needs, as well as a unique CCL# class Project(models.Model): ccl = models.CharField(max_length=30) Techpacks = FileRepo() COAS = FileRepo() Shippingdocs = FileRepo() POchemspecs = FileRepo() Internalpos = FileRepo() Finalreports = FileRepo() Batchrecords = FileRepo() RFPS = FileRepo() Businessdev = FileRepo() QA = FileRepo() Updates = FileRepo() def __unicode__(self): return self.ccl #ProjectFile is the file object used by each FileRepo component class ProjectFile(models.Model): file = models.FileField(uploadto='ProjectFiles') def __unicode__(self): return self.file #FileRepo is the model for the "folders" to be used in a Project class FileRepo(models.Model): typeOf = models.CharField(max_length=30) files = models.ManyToManyField(ProjectFile) def __unicode__(self): return self.typeOf

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  • Ajax/PHP contact form not able to send mail

    - by Steph
    The funny thing is it did work for one evening. I contacted my host, and they are saying there's no reason it should not be working. I have also attempted to test it in Firebug, but it seemed to be sending. And I specifically put the email address (hosted in my domain) on my email safe list, so that is not the culprit either. Would anyone here take a look at it for me? I'd be so grateful. In the header I have: <script type="text/javascript"> $(document).ready(function() { var options = { target: '#alert' }; $('#contactForm').ajaxForm(options); }); $.fn.clearForm = function() { return this.each(function() { var type = this.type, tag = this.tagName.toLowerCase(); if (tag == 'form') return $(':input',this).clearForm(); if (type == 'text' || type == 'password' || tag == 'textarea') this.value = ''; else if (type == 'checkbox' || type == 'radio') this.checked = false; else if (tag == 'select') this.selectedIndex = -1; }); }; </script> Here is the actual form: <form id="contactForm" method="post" action="sendmail.php"> <fieldset> <p>Email Me</p> <div id="fieldset_container"> <label for="name">Your Name:</label> <input type="text" name="name" id="name" /><br /><br /> <label for="email">Email:</label> <input type="text" name="email" id="email" /><br /><br /> <span style="display:none;"> <label for="last">Honeypot:</label> <input type="text" name="last" value="" id="last" /> </span><br /><br /> <label for="message">Comments &amp; Inquiries:</label> <textarea name="message" id="message" cols="" rows=""></textarea><br/> </div> <div id="submit_button"> <input type="submit" name="submit" id="submit" value="Send It" /> </div> </fieldset> </form> <div class="message"><div id="alert"></div></div> Here is the code from my validating page, sendmail.php: <?php // Who you want to recieve the emails from the form. (Hint: generally you.) $sendto = '[email protected]'; // The subject you'll see in your inbox $subject = 'SH Contact Form'; // Message for the user when he/she doesn't fill in the form correctly. $errormessage = 'There seems to have been a problem. May I suggest...'; // Message for the user when he/she fills in the form correctly. $thanks = "Thanks for the email!"; // Message for the bot when it fills in in at all. $honeypot = "You filled in the honeypot! If you're human, try again!"; // Various messages displayed when the fields are empty. $emptyname = 'Entering your name?'; $emptyemail = 'Entering your email address?'; $emptymessage = 'Entering a message?'; // Various messages displayed when the fields are incorrectly formatted. $alertname = 'Entering your name using only the standard alphabet?'; $alertemail = 'Entering your email in this format: <i>[email protected]</i>?'; $alertmessage = "Making sure you aren't using any parenthesis or other escaping characters in the message? Most URLS are fine though!"; //Setting used variables. $alert = ''; $pass = 0; // Sanitizing the data, kind of done via error messages first. Twice is better! ;-) function clean_var($variable) { $variable = strip_tags(stripslashes(trim(rtrim($variable)))); return $variable; } //The first if for honeypot. if ( empty($_REQUEST['last']) ) { // A bunch of if's for all the fields and the error messages. if ( empty($_REQUEST['name']) ) { $pass = 1; $alert .= "<li>" . $emptyname . "</li>"; } elseif ( ereg( "[][{}()*+?.\\^$|]", $_REQUEST['name'] ) ) { $pass = 1; $alert .= "<li>" . $alertname . "</li>"; } if ( empty($_REQUEST['email']) ) { $pass = 1; $alert .= "<li>" . $emptyemail . "</li>"; } elseif ( !eregi("^[_a-z0-9-]+(.[_a-z0-9-]+)*@[a-z0-9-]+(.[a-z0-9-]+)*(.[a-z]{2,3})$", $_REQUEST['email']) ) { $pass = 1; $alert .= "<li>" . $alertemail . "</li>"; } if ( empty($_REQUEST['message']) ) { $pass = 1; $alert .= "<li>" . $emptymessage . "</li>"; } elseif ( ereg( "[][{}()*+?\\^$|]", $_REQUEST['message'] ) ) { $pass = 1; $alert .= "<li>" . $alertmessage . "</li>"; } //If the user err'd, print the error messages. if ( $pass==1 ) { //This first line is for ajax/javascript, comment it or delete it if this isn't your cup o' tea. echo "<script>$(\".message\").hide(\"slow\").show(\"slow\"); </script>"; echo "<b>" . $errormessage . "</b>"; echo "<ul>"; echo $alert; echo "</ul>"; // If the user didn't err and there is in fact a message, time to email it. } elseif (isset($_REQUEST['message'])) { //Construct the message. $message = "From: " . clean_var($_REQUEST['name']) . "\n"; $message .= "Email: " . clean_var($_REQUEST['email']) . "\n"; $message .= "Message: \n" . clean_var($_REQUEST['message']); $header = 'From:'. clean_var($_REQUEST['email']); //Mail the message - for production mail($sendto, $subject, $message, $header, "[email protected]"); //This is for javascript, echo "<script>$(\".message\").hide(\"slow\").show(\"slow\").animate({opacity: 1.0}, 4000).hide(\"slow\"); $(':input').clearForm() </script>"; echo $thanks; die(); //Echo the email message - for development echo "<br/><br/>" . $message; } //If honeypot is filled, trigger the message that bot likely won't see. } else { echo "<script>$(\".message\").hide(\"slow\").show(\"slow\"); </script>"; echo $honeypot; } ?>

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  • C# - Silverlight - CustomAttribute with Enum

    - by cmaduro
    I have the following class: [MetadataAttribute] [AttributeUsage(AttributeTargets.Property, AllowMultiple = false)] public class ModuleActivationButtonAttribute : ExportAttribute { public Enum TargetRegion { get; set; } public ModuleActivationButtonAttribute(Enum targetRegion) : base(typeof(IModuleActivationButton)) { TargetRegion = targetRegion; } } The class compiles fine, but when I decorate my property with it: [ModuleActivationButton(Regions.Tabs)] public IModuleActivationButton ModuleActivationButton { get { return new ModuleActivationButton() as IModuleActivationButton; } set { ModuleActivationButton = value; } } public enum Regions { Content, Tabs } The compiler spits out: Error 1 An attribute argument must be a constant expression, typeof expression or array creation expression of an attribute parameter type C:\...\Manpower4U.Modules.Home\HomeModule.cs 28 33 Manpower4U.Modules.Home

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  • Scala n00b: Critique my code

    - by Peter
    G'day everyone, I'm a Scala n00b (but am experienced with other languages) and am learning the language as I find time - very much enjoying it so far! Usually when learning a new language the first thing I do is implement Conway's Game of Life, since it's just complex enough to give a good sense of the language, but small enough in scope to be able to whip up in a couple of hours (most of which is spent wrestling with syntax). Anyhoo, having gone through this exercise with Scala I was hoping the Scala gurus out there might take a look at the code I've ended up with and provide feedback on it. I'm after anything - algorithmic improvements (particularly concurrent solutions!), stylistic improvements, alternative APIs or language constructs, disgust at the length of my function names - whatever feedback you've got, I'm keen to hear it! You should be able to run the following script via "scala GameOfLife.scala" - by default it will run a 20x20 board with a single glider on it - please feel free to experiment. // CONWAY'S GAME OF LIFE (SCALA) abstract class GameOfLifeBoard(val aliveCells : Set[Tuple2[Int, Int]]) { // Executes a "time tick" - returns a new board containing the next generation def tick : GameOfLifeBoard // Is the board empty? def empty : Boolean = aliveCells.size == 0 // Is the given cell alive? protected def alive(cell : Tuple2[Int, Int]) : Boolean = aliveCells contains cell // Is the given cell dead? protected def dead(cell : Tuple2[Int, Int]) : Boolean = !alive(cell) } class InfiniteGameOfLifeBoard(aliveCells : Set[Tuple2[Int, Int]]) extends GameOfLifeBoard(aliveCells) { // Executes a "time tick" - returns a new board containing the next generation override def tick : GameOfLifeBoard = new InfiniteGameOfLifeBoard(nextGeneration) // The next generation of this board protected def nextGeneration : Set[Tuple2[Int, Int]] = aliveCells flatMap neighbours filter shouldCellLiveInNextGeneration // Should the given cell should live in the next generation? protected def shouldCellLiveInNextGeneration(cell : Tuple2[Int, Int]) : Boolean = (alive(cell) && (numberOfAliveNeighbours(cell) == 2 || numberOfAliveNeighbours(cell) == 3)) || (dead(cell) && numberOfAliveNeighbours(cell) == 3) // The number of alive neighbours for the given cell protected def numberOfAliveNeighbours(cell : Tuple2[Int, Int]) : Int = aliveNeighbours(cell) size // Returns the alive neighbours for the given cell protected def aliveNeighbours(cell : Tuple2[Int, Int]) : Set[Tuple2[Int, Int]] = aliveCells intersect neighbours(cell) // Returns all neighbours (whether dead or alive) for the given cell protected def neighbours(cell : Tuple2[Int, Int]) : Set[Tuple2[Int, Int]] = Set((cell._1-1, cell._2-1), (cell._1, cell._2-1), (cell._1+1, cell._2-1), (cell._1-1, cell._2), (cell._1+1, cell._2), (cell._1-1, cell._2+1), (cell._1, cell._2+1), (cell._1+1, cell._2+1)) // Information on where the currently live cells are protected def xVals = aliveCells map { cell => cell._1 } protected def xMin = (xVals reduceLeft (_ min _)) - 1 protected def xMax = (xVals reduceLeft (_ max _)) + 1 protected def xRange = xMin until xMax + 1 protected def yVals = aliveCells map { cell => cell._2 } protected def yMin = (yVals reduceLeft (_ min _)) - 1 protected def yMax = (yVals reduceLeft (_ max _)) + 1 protected def yRange = yMin until yMax + 1 // Returns a simple graphical representation of this board override def toString : String = { var result = "" for (y <- yRange) { for (x <- xRange) { if (alive (x,y)) result += "# " else result += ". " } result += "\n" } result } // Equality stuff override def equals(other : Any) : Boolean = { other match { case that : InfiniteGameOfLifeBoard => (that canEqual this) && that.aliveCells == this.aliveCells case _ => false } } def canEqual(other : Any) : Boolean = other.isInstanceOf[InfiniteGameOfLifeBoard] override def hashCode = aliveCells.hashCode } class FiniteGameOfLifeBoard(val boardWidth : Int, val boardHeight : Int, aliveCells : Set[Tuple2[Int, Int]]) extends InfiniteGameOfLifeBoard(aliveCells) { override def tick : GameOfLifeBoard = new FiniteGameOfLifeBoard(boardWidth, boardHeight, nextGeneration) // Determines the coordinates of all of the neighbours of the given cell override protected def neighbours(cell : Tuple2[Int, Int]) : Set[Tuple2[Int, Int]] = super.neighbours(cell) filter { cell => cell._1 >= 0 && cell._1 < boardWidth && cell._2 >= 0 && cell._2 < boardHeight } // Information on where the currently live cells are override protected def xRange = 0 until boardWidth override protected def yRange = 0 until boardHeight // Equality stuff override def equals(other : Any) : Boolean = { other match { case that : FiniteGameOfLifeBoard => (that canEqual this) && that.boardWidth == this.boardWidth && that.boardHeight == this.boardHeight && that.aliveCells == this.aliveCells case _ => false } } override def canEqual(other : Any) : Boolean = other.isInstanceOf[FiniteGameOfLifeBoard] override def hashCode : Int = { 41 * ( 41 * ( 41 + super.hashCode ) + boardHeight.hashCode ) + boardWidth.hashCode } } class GameOfLife(initialBoard: GameOfLifeBoard) { // Run the game of life until the board is empty or the exact same board is seen twice // Important note: this method does NOT necessarily terminate!! def go : Unit = { var currentBoard = initialBoard var previousBoards = List[GameOfLifeBoard]() while (!currentBoard.empty && !(previousBoards contains currentBoard)) { print(27.toChar + "[2J") // ANSI: clear screen print(27.toChar + "[;H") // ANSI: move cursor to top left corner of screen println(currentBoard.toString) Thread.sleep(75) // Warning: unbounded list concatenation can result in OutOfMemoryExceptions ####TODO: replace with LRU bounded list previousBoards = List(currentBoard) ::: previousBoards currentBoard = currentBoard tick } // Print the final board print(27.toChar + "[2J") // ANSI: clear screen print(27.toChar + "[;H") // ANSI: move cursor to top left corner of screen println(currentBoard.toString) } } // Script starts here val simple = Set((1,1)) val square = Set((4,4), (4,5), (5,4), (5,5)) val glider = Set((2,1), (3,2), (1,3), (2,3), (3,3)) val initialBoard = glider (new GameOfLife(new FiniteGameOfLifeBoard(20, 20, initialBoard))).go //(new GameOfLife(new InfiniteGameOfLifeBoard(initialBoard))).go // COPYRIGHT PETER MONKS 2010 Thanks! Peter

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  • Django MultiWidget Phone Number Field

    - by Birdman
    I want to create a field for phone number input that has 2 text fields (size 3, 3, and 4 respectively) with the common "(" ")" "-" delimiters. Below is my code for the field and the widget, I'm getting the following error when trying to iterate the fields in my form during initial rendering (it happens when the for loop gets to my phone number field): Caught an exception while rendering: 'NoneType' object is unsubscriptable class PhoneNumberWidget(forms.MultiWidget): def __init__(self,attrs=None): wigs = (forms.TextInput(attrs={'size':'3','maxlength':'3'}),\ forms.TextInput(attrs={'size':'3','maxlength':'3'}),\ forms.TextInput(attrs={'size':'4','maxlength':'4'})) super(PhoneNumberWidget, self).__init__(wigs, attrs) def decompress(self, value): return value or None def format_output(self, rendered_widgets): return '('+rendered_widgets[0]+')'+rendered_widgets[1]+'-'+rendered_widgets[2] class PhoneNumberField(forms.MultiValueField): widget = PhoneNumberWidget def __init__(self, *args, **kwargs): fields=(forms.CharField(max_length=3), forms.CharField(max_length=3), forms.CharField(max_length=4)) super(PhoneNumberField, self).__init__(fields, *args, **kwargs) def compress(self, data_list): if data_list[0] in fields.EMPTY_VALUES or data_list[1] in fields.EMPTY_VALUES or data_list[2] in fields.EMPTY_VALUES: raise fields.ValidateError(u'Enter valid phone number') return data_list[0]+data_list[1]+data_list[2] class AdvertiserSumbissionForm(ModelForm): business_phone_number = PhoneNumberField(required=True)

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  • python: subclass a metaclass

    - by Michael Konietzny
    Hello, for putting methods of various classes into a global registry I'm using a decorator with a metaclass. The decorator tags, the metaclass puts the function in the registry: class ExposedMethod (object): def __init__(self, decoratedFunction): self._decoratedFunction = decoratedFunction def __call__(__self,*__args,**__kw): return __self._decoratedFunction(*__args,**__kw) class ExposedMethodDecoratorMetaclass(type): def __new__(mcs, name, bases, dct): for obj_name, obj in dct.iteritems(): if isinstance(obj, ExposedMethod): WorkerFunctionRegistry.addWorkerToWorkerFunction(obj_name, name) return type.__new__(mcs, name, bases, dct) class MyClass (object): __metaclass__ = DiscoveryExposedMethodDecoratorMetaclass @ExposeDiscoveryMethod def myCoolExposedMethod (self): pass I've now came to the point where two function registries are needed. The first thought was to subclass the metaclass and put the other registry in. For that the new method has simply to be rewritten. Since rewriting means redundant code this is not what I really want. So, it would be nice if anyone could name a way how to put an attribute inside of the metaclass which is able to be read when new is executed. With that the right registry could be put in without having to rewrite new. Thanks and Greetings, Michael

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  • What do I return if the return type of a method is Void? (Not void!)

    - by DR
    Due to the use of Generics in Java I ended up in having to implement a function having Void as return type: public Void doSomething() { //... } and the compiler demands that I return something. For now I'm just returning null, but I'm wondering if that is good coding practice... I've also tried Void.class, void, Void.TYPE, new Void(), no return at all, but all that doesn't work at all. (For more or less obvious reasons) (See this answer for details) So what am I supposed to return if the return type of a function is Void? What's the general use of the Void class? EDIT: Just to spare you the downvotes: I'm asking about V?oid, not v?oid. The class Void, not the reserved keyword void.

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  • [LINQ]InsertOnSubmit NullReferenceException

    - by Kurresmack
    Hello, I have a rather annoying issue with LinqToSql. I have created a class that is derived from the class in the DataContext. The problem is that as soon as I use "InsertOnSubmit(this);" on this derived class I get a NullReferenceException. I've seen some people with the same issue. However they've used a custom constructor and solved the issue by calling ": this()" like this thread http://social.msdn.microsoft.com/Forums/en-US/linqprojectgeneral/thread/0cf1fccb-6398-4f16-920b-adef9dc4ac9f The difference is that I use a default constructor which causes the base constructor to be called so there should not be any problem! Could someone please help me with this, starts to get annoying! Thanks :)

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  • java rest web service RuntimeException WEB9033

    - by user272483
    hi, i'm developing a rest web service in java. i'm using htmlparser library on it. but when i try to run service i'm getting this exception. i can build it successfully. and org.htmlparser.beans.StringBean class exists in project. exception javax.servlet.ServletException: java.lang.RuntimeException: WEB9033: Unable to load class with name [org.htmlparser.beans.StringBean], reason: java.lang.NoClassDefFoundError: org/htmlparser/visitors/NodeVisitor root cause java.lang.RuntimeException: WEB9033: Unable to load class with name [org.htmlparser.beans.StringBean], reason: java.lang.NoClassDefFoundError: org/htmlparser/visitors/NodeVisitor root cause java.lang.NoClassDefFoundError: org/htmlparser/visitors/NodeVisitor root cause java.lang.ClassNotFoundException: org.htmlparser.visitors.NodeVisitor

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  • Emberjs bindAttr inside of #each

    - by Andrej Kaurin
    Code for view is Ember.View.extend({ template: Ember.Handlebars.compile(html), // html is in string content: function() { return [ { Title: "Dashboard", ID: "dashboard" }, { Title: "Invoices", ID: "invoices" }, { Title: "Expenses", ID: "expenses" }, { Title: "People", ID: "people" }, { Title: "Reports", ID: "reports" }, { Title: "Settings", ID: "settings" } ]}, iconClass: "icon icon-dashboard" }); Template (show above as "html") looks like this: <ul> {{#each link in content}} <li> <a> <span class="icon" {{bindAttr class="iconClass"}}></span> <span class="title">{{link.Title}}</span> </a> </li> {{/each}} </ul> Am I doing something wrong with scope or?

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  • How To: UiBinder + GWT MVP + multiple independent display areas

    - by Prt Yz
    I am using GWT MVP and UiBinder to create an app with a DockLayoutPanel. I want the north and south docks to be static, containing buttons and links. I want to have dynamic views in the center and two different areas of the east dock. As these dynamic areas should be independent of each other, I am setting up different ActivityMapper and ActivityManager's for each dynamic display area; center, east-top, and east-bottom. How can I independently initialize these 3 different display areas when the application is loaded? How can I switch from one Activity to another in one display area without affecting the other areas? When I use the the PlaceController's goTo to switch from one Place to another in one area, the other area's Activity is stopped. Mayday, please help, mayday! The following is some of my code: AppViewImpl.ui.xml <g:DockLayoutPanel styleName="{style.dockPanel}" unit="PX" width="975px" height="100%"> <!-- DOCK PANEL EAST --> <g:east size="220"> <g:LayoutPanel styleName="{style.eastPanel}"> <g:layer left="0px" width="220px" top="0px" height="105px"> <g:SimpleLayoutPanel ui:field="topRightPanel"/> </g:layer> <g:layer left="0px" width="220px" top="110px" height="340px"> <g:InlineLabel styleName="{style.label}" text="ANOTHER DISPLAY AREA"/> </g:layer> </g:LayoutPanel> </g:east> <!-- DOCK PANEL NORTH --> <g:north size="110"> <g:LayoutPanel styleName="{style.northPanel}"> <g:layer left="0px" width="755px" top="0px" height="105px"> <g:InlineLabel styleName="{style.label}" text="NORTH PANEL"/> </g:layer> </g:LayoutPanel> </g:north> <!-- DOCK PANEL SOUTH --> <g:south size="20"> <g:LayoutPanel styleName="{style.southPanel}"> <g:layer left="0px" width="755px" top="0px" height="20px"> <g:InlineLabel styleName="{style.label}" text="SOUTH PANEL"/> </g:layer> </g:LayoutPanel> </g:south> <!-- DOCK PANEL CENTER --> <g:center> <g:SimpleLayoutPanel ui:field="mainPanel" /> </g:center> </g:DockLayoutPanel> MyModule.java public class MyModule implements EntryPoint { private Place defaultPlace = new DefaultPlace(""); public void onModuleLoad() { // Create ClientFactory using deferred binding so we can replace with // different impls in gwt.xml ClientFactory clientFactory = GWT.create(ClientFactory.class); EventBus eventBus = clientFactory.getEventBus(); PlaceController placeController = clientFactory.getPlaceController(); // Start ActivityManager for the main widget with our ActivityMapper ActivityMapper topRightActivityMapper = new TopRightActivityMapper(clientFactory); ActivityManager topRightActivityManager = new ActivityManager(topRightActivityMapper, eventBus); topRightActivityManager.setDisplay(clientFactory.getAppView().getTopRightPanel()); // Start ActivityManager for the main widget with our ActivityMapper ActivityMapper mainActivityMapper = new AppActivityMapper(clientFactory); ActivityManager mainActivityManager = new ActivityManager(mainActivityMapper, eventBus); mainActivityManager.setDisplay(clientFactory.getAppView().getMainPanel()); // Start PlaceHistoryHandler with our PlaceHistoryMapper AppPlaceHistoryMapper historyMapper = GWT .create(AppPlaceHistoryMapper.class); PlaceHistoryHandler historyHandler = new PlaceHistoryHandler(historyMapper); historyHandler.register(placeController, eventBus, defaultPlace); RootLayoutPanel.get().add(clientFactory.getAppView()); // Goes to place represented on URL or default place historyHandler.handleCurrentHistory(); new AppController(clientFactory); } } AppController.java public class AppController implements AppView.Presenter { private ClientFactory clientFactory; AppController(ClientFactory clientFactory){ this.clientFactory = clientFactory; goTo(new TopRightAPlace("")); } @Override public void goTo(Place place) { clientFactory.getPlaceController().goTo(place); } } TopRightAViewImpl.java public class TopRightAViewImpl extends Composite implements TopRightAView { interface Binder extends UiBinder<Widget, TopRightAViewImpl> { } private static final Binder binder = GWT.create(Binder.class); private Presenter listener; @UiField Button button; public TopRightAViewImpl() { initWidget(binder.createAndBindUi(this)); } @Override public void setName(String name) { button.setHTML(name); } @Override public void setPresenter(Presenter listener) { this.listener = listener; } @UiHandler("button") void onButtonClick(ClickEvent event) { listener.goTo(some other place); } }

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  • Is it worth learning Perl 6?

    - by Andres
    I have the opportunity to take a two day class on Perl 6 with the Rakudo Compiler. I don't want to start a religious war, but is it worth my time? Is there any reason to believe that Perl 6 will be practical in the real world within the next two years? Does anyone currently use it effectively? Update I took the class and learned a lot. However, after day 1, my mind was a bit overwhelmed. There are tons of cool ideas in perl 6, and it will be neat to see what filters up to other languages. Overall the experience was a positive use of my time, though I wasn't able to absorb as much on the second day. If it were a three day class it would have been unproductive just because there is a limit to how much you can process in a short amount of time.

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  • How to get access to a window that is loaded into a panel

    - by Sandor Drieënhuizen
    I'm loading an external script (that creates a new window component) into a panel, which works fine. Now, I want to access the created window from a callback function to register a closed event handler. I've tried the following: panel.load({ scripts: true, url: '/createWindow', callback: function(el, success, response, options) { panel.findByType("window")[0].on("close", function { alert("Closed"); }); } }); However, the panel seems to be empty all the time, the findByType method keeps returning an empty collection. I've tried adding events handlers for events like added to the panel but none of them got fired. So the question is: how do I access the window in the panel to register my close event handler on it?

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  • Hibernate exception

    - by Mark
    Hi all, im new to hibernate! i have followed the netbeans tutorial on creating a hibernate enabled application. after sucessfully creating a database in mysql workbench i reversed engineered the pojos etc and then tried to run a simple query(from Course) and got the following org.hibernate.MappingException: An association from the table coursemodule refers to an unmapped class: DAL.Module at org.hibernate.cfg.Configuration.secondPassCompileForeignKeys(Configuration.java:1252) at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1170) at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:324) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1286) at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:859) heres the generated class for Course package DAL; // Generated 02-May-2010 16:41:16 by Hibernate Tools 3.2.1.GA import java.util.HashSet; import java.util.Set; /** * Course generated by hbm2java */ public class Course implements java.io.Serializable { private int id; private String name; private Set<Module> modules = new HashSet<Module>(0); public Course() { } public Course(int id, String name) { this.id = id; this.name = name; } public Course(int id, String name, Set<Module> modules) { this.id = id; this.name = name; this.modules = modules; } public int getId() { return this.id; } public void setId(int id) { this.id = id; } public String getName() { return this.name; } public void setName(String name) { this.name = name; } public Set<Module> getModules() { return this.modules; } public void setModules(Set<Module> modules) { this.modules = modules; } } and its config file course.hbm.xml <?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <!-- Generated 02-May-2010 16:41:16 by Hibernate Tools 3.2.1.GA --> <hibernate-mapping> <class name="DAL.Course" table="course" catalog="walkthrough"> <id name="id" type="int"> <column name="id" /> <generator class="assigned" /> </id> <property name="name" type="string"> <column name="name" not-null="true" /> </property> <set name="modules" inverse="false" table="coursemodule"> <key> <column name="courseId" not-null="true" unique="true" /> </key> <many-to-many entity-name="DAL.Module"> <column name="moduleId" not-null="true" unique="true" /> </many-to-many> </set> </class> </hibernate-mapping> hibernate.reveng.xml <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-reverse-engineering PUBLIC "-//Hibernate/Hibernate Reverse Engineering DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-reverse-engineering-3.0.dtd"> <hibernate-reverse-engineering> <schema-selection match-catalog="Walkthrough"/> <table-filter match-name="walkthrough"/> <table-filter match-name="course"/> <table-filter match-name="module"/> <table-filter match-name="studentmodule"/> <table-filter match-name="attendee"/> <table-filter match-name="student"/> <table-filter match-name="coursemodule"/> <table-filter match-name="session"/> <table-filter match-name="test"/> </hibernate-reverse-engineering> hibernate.cfg.xml <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property> <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/Walkthrough</property> <property name="hibernate.connection.username">root</property> <property name="hibernate.connection.password">password</property> <property name="hibernate.show_sql">true</property> <property name="hibernate.current_session_context_class">thread</property> <mapping resource="DAL/Student.hbm.xml"/> <mapping resource="DAL/Walkthrough.hbm.xml"/> <mapping resource="DAL/Test.hbm.xml"/> <mapping resource="DAL/Module.hbm.xml"/> <mapping resource="DAL/Session.hbm.xml"/> <mapping resource="DAL/Course.hbm.xml"/> </session-factory> </hibernate-configuration> any ideas on why im getting this exception? ps. test is just a table with an id in it and is not related to anything. running "from Test" works

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  • Grails checkbox

    - by Tomáš
    Hi gurus I have trouble with binding Boolean property in association classes. Property is set to true if I check checkbox (good), but is null if checbox is not checked. I know the problem with HTML checkbox. I know why is send "_fieldName" in params, but this "_fieldName" dont set my boolean property to false. class Person{ String title List<Group> groups = new ArrayList() static hasMany = [groups: Groups] } class Group{ String title Boolean isHidden static belongTo = Person } class PersonController{ def form = { def person = new Person() person.groups.add( new Group() ) return ["person": person] } def handleForm = { def person = new Person( params ) println person.groups[0] } } If I check checkbox: [isHidden:on, title:a, _isHidden:] println person.groups[0] //true If I don check checkbox: [title:a, _isHidden:] println person.groups[0] //null Thank a lot for help Tom I am sorry, I searched this web, but did not get actual info for my trouble.

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  • Accessing the relationship of a relationship with Entity Framework

    - by J. Pablo Fernández
    I the School class I have this code: from student in this.Students where student.Teacher.Id == id select student The Student class there are two relationships: Teacher and School. In the School class I'm trying to find out all the students whose Teacher has a given id. The problem is that I get System.NullReferenceException: Object reference not set to an instance of an object. in the statement student.Teacher.Id I thought of doing this.Students.Include("Teacher"), but this.Students doesn't have such a method. Any ideas how can I perform that query?

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  • DataBinding to ListView

    - by Neir0
    Hi, I have a class public class Foo { public List<string> list1 { get; set;} public List<string> list2 { get; set; } public string url; } and a ListView with two columns <ListView Name="listview" ItemsSource="{Binding}"> <ListView.View> <GridView> <GridViewColumn Header="list1" DisplayMemberBinding="{Binding Path=list1}" /> <GridViewColumn Header="list2" DisplayMemberBinding="{Binding Path=list2}" /> </GridView> </ListView.View> </ListView> How i can to bind instance of Foo class to ListView? Here i set DataContext listview.DataContext = new Foo() { list1 = new[] { "dsfasd", "asdfasdf", "asdf", "asdfasd" }.ToList(), list2 = new[] { "dsfasd", "asdfasdf", "asdf", "asdfasd" }.ToList() }; But it's not work.

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  • JQuery treeview - add node(s) in middle of tree

    - by Chris
    Hi all, I'm just getting started with JQuery and the treeview plugin so this should be a relatively easy question: The example code for adding branches to the tree: var newnodes = $("<li><span class='folder'>New Sublist</span><ul>" + "<li><span class='file'>Item1</span></li>" + "<li><span class='file'>Item2</span></li></ul></li>").appendTo("#browser"); $("#browser").treeview({ add: branches }); Works fine for me, but adds the new branch at the end of the tree - instead what I want is to be able to select a specific node and add to that branch. I've managed to get the node being added by using the id of the particular node instead of the whole treeview in - appendTo("nodeID") However I can't get the tree to render correctly, either with: $("nodeID").treeview({ add: branches }); or $("browser").treeview({ add: branches }); or calling it on both without arguments. Cheers in advance

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  • How get Win32_OperatingSystem.LastBootUpTime in datetime format

    - by chekalin-v
    I have been trying to get LastBootUpTime using Win32_OperatingSystem class (WMI). HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1, &pclsObj, &uReturn); if(0 == uReturn) { break; } VARIANT vtProp; // Get the value of the Name property hr = pclsObj->Get(L"LastBootUpTime", 0, &vtProp, 0, 0); VariantClear(&vtProp); I want to write this time to CTime or COleDateTime variable. But variable vtProp has BSTR type and look like 20100302185848.499768+300 Also any datetime property of any WMI class have BSTR type How can I put datetime property of WMI class to CTime?

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  • Scrapy spider is not working

    - by Zeynel
    Since nothing so far is working I started a new project with python scrapy-ctl.py startproject Nu I followed the tutorial exactly, and created the folders, and a new spider from scrapy.contrib.spiders import CrawlSpider, Rule from scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor from scrapy.selector import HtmlXPathSelector from scrapy.item import Item from Nu.items import NuItem from urls import u class NuSpider(CrawlSpider): domain_name = "wcase" start_urls = ['http://www.whitecase.com/aabbas/'] names = hxs.select('//td[@class="altRow"][1]/a/@href').re('/.a\w+') u = names.pop() rules = (Rule(SgmlLinkExtractor(allow=(u, )), callback='parse_item'),) def parse(self, response): self.log('Hi, this is an item page! %s' % response.url) hxs = HtmlXPathSelector(response) item = Item() item['school'] = hxs.select('//td[@class="mainColumnTDa"]').re('(?<=(JD,\s))(.*?)(\d+)') return item SPIDER = NuSpider() and when I run C:\Python26\Scripts\Nu>python scrapy-ctl.py crawl wcase I get [Nu] ERROR: Could not find spider for domain: wcase The other spiders at least are recognized by Scrapy, this one is not. What am I doing wrong? Thanks for your help!

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  • Java type for date/time when using Oracle Date with Hibernate

    - by Marcus
    We have a Oracle Date column. At first in our Java/Hibernate class we were using java.sql.Date. This worked but it didn't seem to store any time information in the database when we save so I changed the Java data type to Timestamp. Now we get this error: springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.dao.an notation.PersistenceExceptionTranslationPostProcessor#0' defined in class path resource [margin-service-domain -config.xml]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreatio nException: Error creating bean with name 'sessionFactory' defined in class path resource [m-service-doma in-config.xml]: Invocation of init method failed; nested exception is org.hibernate.HibernateException: Wrong column type: CREATE_TS, expected: timestamp Any ideas on how to map an Oracle Date while retaining the time portion? Update: I can get it to work if I use the Oracle Timestamp data type but I don't want that level of precision ideally. Just want the basic Oracle Date.

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  • Setting classpath java for use in Runtime.exec

    - by phil swenson
    I am trying to spawn a process using Runtime.exec. I want to use my current classpath : System.getProperty("java.class.path") Unfortunately, I am having all kinds of issues. When it works on my mac, it doesn't work on Windows. And doesn't work on my mac ever when there is a space in the classpath. The error I always get is ClassDefNotFound, so it's related to how I'm building and passing in the classpath. here is some sample code: String startClass = "com.test.MyClass" String javaHome = System.getProperty("java.home"); String javaCmd = javaHome + "/bin/java"; String classPath = "-Djava.class.path=" + System.getProperty("java.class.path"); String[] commands = new String[]{javaCmd, classPath, startClass}; String commandString = StringUtils.join(commands, " "); Process process = Runtime.getRuntime().exec(commandString); So, how should I setup the classpath? Thanks for any help

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  • Navigate to the Same Page After Action in JSF 2

    - by shipmaster
    I have a component done in JSF 1.x, this component has a command button as follows <h:commandButton ... action="#{templateController.next}" /> Where templateController was passed as an EL binding and can be any object that implements a certain interface. The generic implementation of next() was just executing code and then returning an empty string causing the same page to refresh: public String next() { ..... return ""; } Now I am trying to port that component to JSF 2, my problem is that an empty string doesn't cause the same page to refresh anymore, instead, the framework tries to redirect to a page called ".jsf" i.e it just appends .jsf to whatever the outcome is. My question is how to return an outcome that causes the current page to refresh. My component is generic and I don't know before hand the name of the page it is going to be used on. Thanks

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  • Why can't I declare C# methods virtual and static?

    - by Luke
    I have a helper class that is just a bunch of static methods and would like to subclass the helper class. Some behavior is unique depending on the subclass so I would like to call a virtual method from the base class, but since all the methods are static I can't create a plain virtual method (need object reference in order to access virtual method). Is there any way around this? I guess I could use a singleton.. HelperClass.Instance.HelperMethod() isn't so much worse than HelperClass.HelperMethod(). Brownie points for anyone that can point out some languages that support virtual static methods. Edit: OK yeah I'm crazy. Google search results had me thinking I wasn't for a bit there.

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