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  • How to create a closure and pass in variable length argument list?

    - by Jian Lin
    We can create a closure p by capturing the arguments in the scope in the following code: var p = function() { }; if (typeof(console) != 'undefined' && console.log) { p = function() { console.log(arguments); }; } but the arguments are passed like an array to console.log, instead of passed one by one as in console.log(arguments[0], arguments[1], arguments[2], ... Is there a way to expand the arguments and pass to console.log like the way above? Note that p = console.log; works well in Firefox and IE 8 but not on Chrome.

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  • Flash AS 3 Loader OnComplete Inside a Loop

    - by meengla
    Hi, I think I posted my question as an answer elsewhere (http://stackoverflow.com/questions/2338317/how-to-get-associated-urlrequest-from-event-complete-fired-by-urlloader/2776515#2776515) . Sorry. Here is my question again: Hi, How can I make your function work for loader object in a loop? Thanks! Meengla Here is my existing (rough) code; I always get the mylabel from the last element of the array. var _loader = new Loader(); for (j = 0; j < 5; j++) { //mylabel variable is correct setup in the loop _loader.contentLoaderInfo.addEventListener(Event.COMPLETE, function(e:Event):void { doneLoad(e, mylabel); }); _loader.load(new URLRequest(encodeURI(recAC[j].url))); }//for loop

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  • jquery validation problems

    - by CoffeeCode
    to custom validate an input i wrote a script: function cardNumberCheck(value, element) { var res = false; $.get("/CaseHistories/ValidateCardNumber", { caseHistoryId: $('#CaseHistory_Id').val(), cardNumber: $('#CaseHistory_CardNumber').val() }, function(data) { res = data }); //alert(res) => works fine return true/false return res; } $.validator.addMethod("cardValidate", cardNumberCheck, "invalid"); if ($('#CaseHistory_CardNumber').is("form *")) { //<= check if elem is in a form $('#CaseHistory_CardNumber').rules("add", { required: true, cardValidate: true, messages: { required: "*", cardValidate: "invalid" } }); } EDIT: the required rule works fine, but my validation method doesn't dispalt the message. and the submit works even if the elements data havent passed the cardNumberCheck validation whats not right here?

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  • Better exception for non-exhaustive patterns in case

    - by toofarsideways
    Is there a way to get GHCi to produce better exception messages when it finds at runtime that a call has produced value that does not match the function's pattern matching? It currently gives the line numbers of the function which produced the non-exhaustive pattern match which though helpful at times does require a round of debugging which at times I feel is doing the same set of things over and over. So before I tried to put together a solution I wanted to see if something else exists. An exception message that in addition to giving the line numbers shows what kind of call it attempted to make? Is this even possible?

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  • Condition checking vs. Exception handling

    - by Aidas Bendoraitis
    When is exception handling more preferable than condition checking? There are many situations where I can choose using one or the other. For example, this is a summing function which uses a custom exception: # module mylibrary class WrongSummand(Exception): pass def sum_(a, b): """ returns the sum of two summands of the same type """ if type(a) != type(b): raise WrongSummand("given arguments are not of the same type") return a + b # module application using mylibrary from mylibrary import sum_, WrongSummand try: print sum_("A", 5) except WrongSummand: print "wrong arguments" And this is the same function, which avoids using exceptions # module mylibrary def sum_(a, b): """ returns the sum of two summands if they are both of the same type """ if type(a) == type(b): return a + b # module application using mylibrary from mylibrary import sum_ c = sum_("A", 5) if c is not None: print c else: print "wrong arguments" I think that using conditions is always more readable and manageable. Or am I wrong? What are the proper cases for defining APIs which raise exceptions and why?

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  • How to create custom exception handler for custom controls or extension methods.

    - by Shantanu Gupta
    I am creating an extension method in C# to retrieve some value from datagridview. Here if a user gives column name that doesnot exists then i want this function to throw an exception that can be handled at the place where this function will be called. How can i achieve this. public static T Value<T>(this DataGridView dgv, int RowNo, string ColName) { if (!dgv.Columns.Contains(ColName)) throw new ArgumentException("Column Name " + ColName + " doesnot exists in DataGridView."); return (T)Convert.ChangeType(dgv.Rows[RowNo].Cells[ColName].Value, typeof(T)); }

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  • fb:comments does not showing Log out link

    - by mahfuz05
    fb.comments does not showing Log out link here is my code < fb:comments xid="mahfuz" canpost="true" candelete="false" > < /fb:comments> here is JS SDK code <div id="fb-root"></div> <script type="text/javascript"> window.fbAsyncInit = function() { FB.init({appId: 'my app id', status: true, cookie: true, xfbml: true}); }; (function() { var e = document.createElement('script'); e.async = true; e.src = document.location.protocol + '//connect.facebook.net/en_US/all.js'; document.getElementById('fb-root').appendChild(e); }()); </script>

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  • Show only one validation error-message using replaceWith

    - by timkl
    I am currently working with the jQuery validation plugin, and I want to show only one error-message before the form itself. Right now the validation shows all the error-messages on top of each others as they stack up, as you can see in my live example: http://timkjaerlange.com/foobar/stack-stuff/validate-test.html This is my jQuery: $(document).ready(function() { $("form").validate({ rules: { // bunch of rules here, left out to keep it simple }, messages: { // messages goes here }, errorElement: 'div', errorClass: 'error', errorPlacement: function(error, element) { error.insertBefore('form'); // this is what I've got $('div').replaceWith(error); // trying to replace the prev error } }); }); Anybody know how to this? Is this the best way to show only one error-message? Any help is highly appreciated.

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  • how i can use SAX parser

    - by moustafa
    This is what the result should look like when i parse it through a SAX parser http://img13.imageshack.us/img13/6950/75914446.jpg This is the XML source code from which i need to generate the display: <orders> <order> <count>37</count> <price>49.99</price> <book> <isbn>0130897930</isbn> <title>Core Web Programming Second Edition</title> <authors> <count>2</count> <author>Marty Hall</author> <author>Larry Brown</author> </authors> </book> </order> <order> <count>1</count> <price>9.95</price> <yacht> <manufacturer>Luxury Yachts, Inc.</manufacturer> <model>M-1</model> <standardFeatures oars="plastic" lifeVests="none">false</standardFeatures> </yacht> </order> <order> <count>3</count> <price>22.22</price> <book> <isbn>B000059Z4H</isbn> <title>Harry Potter and the Order of the Phoenix</title> <authors> <count>1</count> <author>J.K. Rowling</author> </authors> </book> </order> i really have no clue how to code the functions but i have just set up the parser $xmlParser = xml_parser_create("UTF-8"); xml_parser_set_option($xmlParser, XML_OPTION_CASE_FOLDING, false); xml_set_element_handler($xmlParser, 'startElement', 'endElement'); xml_set_character_data_handler($xmlParser, 'HandleCharacterData'); $fileName = 'orders.xml'; if (!($fp = fopen($fileName, 'r'))){ die('Cannot open the XML file: ' . $fileName); } while ($data = fread($fp, 4096)){ $parsedOkay = xml_parse($xmlParser, $data, feof($fp)); if (!$parsedOkay){ print ("There was an error or the parser was finished."); break; } } xml_parser_free($xmlParser); function startElement($xmlParser, $name, $attribs) { } function endElement($parser, $name) { } function HandleCharacterData($parser, $data) { }

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  • Changing UINavigationBar font in Swift

    - by dcgoss
    I have a UINavigationBar with a title in the middle. I have added a custom font ("Comic_Andy.ttf") to my app (I have checked info.plist to make sure it's listed, and I have checked the Copy Bundle Resources to make sure it has been added), and I would like the title of the UINavigationBar to be displayed in that font. From what I can gather it seems as though I'm supposed to use this in my ViewController: myNavigationBar.titleTextAttributes = [NSFontAttributeName: UIFont(name: "Comic_Andy", size: 22)] I placed that method in the viewDidLoad function of the ViewController. I have also tried this in the didFinishLaunchingWithOptions function of the AppDelegate: UINavigationBar.appearance().titleTextAttributes = [NSFontAttributeName: UIFont(name: "Comic_Andy", size: 22)] I am programming in Swift, in XCode 6 Beta 6. Many resources regarding this task have mentioned using a method called setTitleTextAttributes, which is nowhere to be seen. I can't figure it out for the life of me - I've probably spent close to 3 hours on it by now - I have checked every StackOverflow answer, every website, so please do not mark this as a duplicate. Many thanks in advance!

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  • What is "sentry object" in C++?

    - by Romain Hippeau
    I answered this question, and Potatoswatter answered too as The modern C++ equivalent would be a sentry object: construct it at the beginning of a function, with its constructor implementing call(), and upon return (or abnormal exit), its destructor implements I am not familiar with using sentry objects in C++. I thought they were limited to input and output streams. Could somebody explain to me about C++ sentry objects as well as how to use them as an around interceptor for one or more methods in a class ? i.e. How to do this ? Sentry objects are very similar indeed. On the one hand they require explicit instantiation (and being passed this) but on the other hand you can add to them so that they check not only the invariants of the class but some pre/post conditions for the function at hand.

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  • SpineJS and RequireJS

    - by ot3m3m
    I am using require.js 2.0. I have the following code that is called initially by require: app.js requirejs.config({ paths: { app: '..', spine: 'spine_src/spine', cs: "cs", }, shim: { 'spine_src/route': { deps: ['spine'] } } }); // Start the main app logic. requirejs(['cs!app/StartApp_Admin', 'spine','spine_src/route'], function (StartApp_Admin, Spine, Route) { { new StartApp_Admin(); } }); And the following controller: StartApp_Admin define () -> class StartApp_Admin extends Spine.Controller constructor: -> @routes "/twitter/:id": (params) -> console.log("/users/", params.id) Spine.Route.setup() When I execute the application I get the following error in my spine route library file (route.js). The application breaks when I call Spine.Route.setup() Uncaught TypeError: Object function (element) {return element;} has no method 'extend' Any help would be greatly appreciated

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  • Fatal error with php code

    - by basma
    hello i have a problem in my php code that use recursion: <?php solveTowers(5, "A", "B", "C"); function solveTowers($count, $src, $dest, $spare) { if (count == 1) { echo "Move a disk from ".$src." to ".$dest ; } else { solveTowers($count - 1, $src, $spare, $dest); solveTowers(1, $src, $dest, $spare); solveTowers($count - 1, $spare, $dest, $src); } } ?> but it doesnt run !! this error accures : Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 261904 bytes) in C:\xampp\htdocs\cap492\towers.php on line 13 line 13 is the first call to the function in the else statment can you please help me with that ?!

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  • python iterators and thread-safety

    - by Igor
    I have a class which is being operated on by two functions. One function creates a list of widgets and writes it into the class: def updateWidgets(self): widgets = self.generateWidgetList() self.widgets = widgets the other function deals with the widgets in some way: def workOnWidgets(self): for widget in self.widgets: self.workOnWidget(widget) each of these functions runs in it's own thread. the question is, what happens if the updateWidgets() thread executes while the workOnWidgets() thread is running? I am assuming that the iterator created as part of the for...in loop will keep some kind of reference to the old self.widgets object? So I will finish iterating over the old list... but I'd love to know for sure.

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  • Emulate clicking a link with Javascript that works with IE

    - by Tam
    I want to have java script clicking a link on the page..I found something on the net that suggests adding a function like this: function fireEvent(obj,evt){ var fireOnThis = obj; if( document.createEvent ) { var evObj = document.createEvent('MouseEvents'); evObj.initEvent( evt, true, false ); fireOnThis.dispatchEvent(evObj); } else if( document.createEventObject ) { fireOnThis.fireEvent('on'+evt); } } Then call it using: fireEvent(document.getElementById('edit_client_link'),'click'); This seems to work fine for FF but with IE it doesn't work! Any ideas?

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  • Anything wrong with this code?

    - by Scott B
    Do I actually have to return $postID in each case, in the code below? This is code required for capturing the values of custom fields I've added to the WP post and page editor. Got the idea from here: http://apartmentonesix.com/2009/03/creating-user-friendly-custom-fields-by-modifying-the-post-page/ add_action('save_post', 'custom_add_save'); function custom_add_save($postID){ if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) { return $postID; } else { // called after a post or page is saved if($parent_id = wp_is_post_revision($postID)) { $postID = $parent_id; } if ($_POST['my_customHeader']) { update_custom_meta($postID, $_POST['my_customHeader'], 'my_customHeader'); } else { update_custom_meta($postID, '', 'my_customHeader'); } if ($_POST['my_customTitle']) { update_custom_meta($postID, $_POST['my_customTitle'], 'my_customTitle'); } else { update_custom_meta($postID, '', 'my_customTitle'); } } return $postID; //IS THIS EVEN NECESSARY? } function update_custom_meta($postID, $newvalue, $field_name) { // To create new meta if(!get_post_meta($postID, $field_name)){ add_post_meta($postID, $field_name, $newvalue); }else{ // or to update existing meta update_post_meta($postID, $field_name, $newvalue); } }

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  • Microsoft JScript runtime error: Object required

    - by Nani
    I wrote a simple javascript function for validating to fields in a aspx page function validate() { if (document.getElementById("<%=tbName.ClientID%>").value=="") { alert("Name Feild can not be blank"); document.getElementById("<%=tbName.ClientID%>").focus(); return false; } if (document.getElementById("<%=ddlBranch.ClientID%>").value=="SelectBranch") { alert("Branch Should Be Selected"); document.getElementById("<%=ddlBranch.ClientID%>").focus(); return false; } } Everything worked fine. Later I linked it to aspx page like a external js file. Now its giving error "Microsoft JScript runtime error: Object required". I'm unable to know where I went wrong.

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  • Cast MyEntity To LinqEntity throw a base controller class

    - by Mohammad Kani
    hi there i design a multilayer we appliction andusing LINQ a my data provider i need to user my own Entites instead o LINQ etities. so i created Entities Project and create my entities in it. when i get data from contex and cast them to my entities , everything is ok. but when i want to cast on of my entities to linq entity , an exception thrown. in my linq entity i add CTYPE operator from and to my entities Exp : Public Class BaseController(Of LinqEntity As {BaseEntity, New}, MyEntity As ModuleEntities.BaseEntityInfo) Implements Interfaces.Base(Of ServiceEntity) 'This methd work fine and cast LinqEntity to MyEntity Public Function GetAll() As List(Of MyEntity ) Dim q = (From x In Context.GetTable(Of LinqEntity)() _ Select x).Cast(Of MyEntityBase) End Function Public Sub Update(ByVal entity As MyEntity) 'here is problem 'cast , direct cast , or anything not work Dim x as LinqEntity = entity Me.Context.GetTable(Of LinqEntity).InsertOnSubmit(entity) Me.Context.SubmiChanges() End Sub

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  • Test if element already has jQuery datepicker

    - by macca1
    I have a form with many input elements. Some are date fields with a jQuery UI datepicker alraedy attached: $("#someElement").mask("9?9/99/9999").datepicker({showOn: 'button', buttonText:'Click here to show calendar', duration: 'fast', buttonImageOnly: true, buttonImage: /images/calicon.gif' }); Then I have a key command bound to this function: function openCalendar() { var selection = document.activeElement; // { Need to test here if datepicker has already been initialized $(selection).datepicker("show"); // } } This works great for elements which already have the datepicker on them. However any other fields will throw a javascript error. I'm wondering the best way to test to see if datepicker has already been initialized on that field.

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  • Unix: millionth number in the serie 2 3 4 6 9 13 19 28 42 63 ... ?

    - by HH
    It takes about minute to achieve 3000 in my comp but I need to know the millionth number in the serie. The definition is recursive so I cannot see any shortcuts except to calculate everything before the millionth number. How can you fast calculate millionth number in the serie? Serie Def n_{i+1} = \floor{ 3/2 * n_{i} } and n_{0}=2. Interestingly, only one site list the serie according to Goolge: this one. Too slow Bash code #!/bin/bash function serie { n=$( echo "3/2*$n" | bc -l | tr '\n' ' ' | sed -e 's@\\@@g' -e 's@ @@g' ); # bc gives \ at very large numbers, sed-tr for it n=$( echo $n/1 | bc ) #DUMMY FLOOR func } n=2 nth=1 while [ true ]; #$nth -lt 500 ]; do serie $n # n gets new value in the function throught global value echo $nth $n nth=$( echo $nth + 1 | bc ) #n++ done

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  • How to convert a DOM node list to an array in Javascript?

    - by Guss
    I have a Javascript function that accepts a list of HTML nodes, but it expects a Javascript array (it runs some Array methods on that) and I want to feed it the output of Document.getElementsByTagName that returns a DOM node list. Initially I thought of using something simple like: Array.prototype.slice.call(list,0) And that works fine in all browsers, except of course Internet Explorer which returns the error "JScript object expected", as apparently the DOM node list returned by Document.getElement* methods is not a JScript object enough to be the target of a function call. Caveats: I don't mind writing Internet Explorer specific code, but I'm not allowed to use any Javascript libraries such as JQuery because I'm writing a widget to be embedded into 3rd party web site, and I cannot load external libraries that will create conflict for the clients. My last ditch effort is to iterate over the DOM node list and create an array myself, but is there a nicer way to do that?

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  • How to escape <, >, and & characters to html entities in Oracle PL/SQL

    - by SWilk
    Hi, I need to send HTML emails directly from oracle PL/SQL package. This works almost fine. I have problem with the fact that some of the data fetched from a table contain things like <S>, <L>, and similar fragments, which sometimes ar treated as HTML tags, and even if not, they are always ignored and never displayed. So, I need to escape this column before inserting into email body. Is there a function to escape html special chars into entities automaticly? Or do I need to replace('<','&lt;',string) manually all the special characters? I found a function to escape URLs but not one for HTML :( Best regards, SWilk

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  • using '.each' method: how do I get the indexes of multiple ordered lists to each begin at [0]?

    - by shecky
    I've got multiple divs, each with an ordered list (various lengths). I'm using jquery to add a class to each list item according to its index (for the purpose of columnizing portions of each list). What I have so far ... <script type="text/javascript"> /* Objective: columnize list items from a single ul or ol in a pre-determined number of columns 1. get the index of each list item 2. assign column class according to li's index */ $(document).ready(function() { $('ol li').each(function(index){ // assign class according to li's index ... index = li number -1: 1-6 = 0-5; 7-12 = 6-11, etc. if ( index <= 5 ) { $(this).addClass('column-1'); } if ( index > 5 && index < 12 ) { $(this).addClass('column-2'); } if ( index > 11 ) { $(this).addClass('column-3'); } // add another class to the first list item in each column $('ol li').filter(function(index) { return index != 0 && index % 6 == 0; }).addClass('reset'); }); // closes li .each func }); // closes doc.ready.func </script> ... succeeds if there's only one list; when there are additional lists, the last column class ('column-3') is added to all remaining list items on the page. In other words, the script is presently indexing continuously through all subsequent lists/list items, rather than being re-set to [0] for each ordered list. Can someone please show me the proper method/syntax to correct/amend this, so that the script addresses/indexes each ordered list anew? many thanks in advance. shecky p.s. the markup is pretty straight-up: <div class="tertiary"> <h1>header</h1> <ol> <li><a href="#" title="a link">a link</a></li> <li><a href="#" title="a link">a link</a></li> <li><a href="#" title="a link">a link</a></li> </ol> </div><!-- END div class="tertiary" -->

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  • How does multiple implementing multiple COM interfaces work in C++?

    - by Martin
    I am trying to understand this example code regarding Browser Helper Objects. Inside, the author implements a single class which exposes multiple interfaces (IObjectWithSite, IDispatch). His QueryInterface function performs the following: if(riid == IID_IUnknown) *ppv = static_cast<BHO*>(this); else if(riid == IID_IObjectWithSite) *ppv = static_cast<IObjectWithSite*>(this); else if (riid == IID_IDispatch) *ppv = static_cast<IDispatch*>(this); I have learned that from a C perspective, interface pointers are just pointers to VTables. So I take it to mean that C++ is capable of returning the VTable of any implemented interface using static_cast. Does this mean that a class constructed in this way has a bunch of VTables in memory (IObjectWithSite, IDispatch, etc)? What does C++ do with the name collisions on the different interfaces (they each have a QueryInterface, AddRef and Release function), can I implement different methods for each of these?

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  • OpenCv QT CvNamedWindow IplImage not working

    - by Shahzaib
    I have problem with displaying Cam on QTLabel using openCV, Every thing is working fine . except one . I have to call function from open === cvNamedWindow() == in order for program to work properly . its displaying the webcam on the QLabel no problem but if i don't call the cvNamedWindow function then the program is just hanging its just keep displaying the camera which are working on the screen but i can't click on any thing else its getting freeze. doest any one has any idea why its happening and what i am doing wrong ?

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