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  • How to implement pure virtual function in C++

    - by skydoor
    Hi, I think the implementation of virtual function is talked about a lot. My question is what about pure virtual function? However it is implemented? In virtual table, how to tell it is a pure or non-pure? What the difference between pure virtual function and virtual function with implementation?

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  • Is there any difference between var name = function() {} & function name() {} in Javascript?

    - by Fletcher Moore
    Suppose we are inside a function and not in the global namespace. function someGlobalFunction() { var utilFunction1 = function() { } function utilFunction2 () { } utilFunction1(); utilFunction2(); } Are these synonymous? And do these functions completely cease to exist when someGlobalFunction returns? Should I prefer one or the other for readability or some other reason?

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  • [jQuery] Several buttons on one form calling same function

    - by user198003
    hi all, trying to develop web form using jquery. all i need is to have several (don't know how many) buttons on one form. all of those buttons have to call one same function, and to pass one parameter to that function. that function have to do some post method, but i can handle it. so, my main problem is that i don't know how to develop JS that will call specific jquery function. can you help me with this?

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  • What's the differenct between passing a function and the function call itself in javascript?

    - by Mingus Rude
    In the application I'm building I'm polling for a status update and I have noticed that if the call is made as follows the timeout fires continuously: setTimeout($.get("http://localhost:8080/status", function(data) { UpdateStatus(data);}), 1000); While if use a function instead the timeout fires every 1000 ms: setTimeout(function() {$.get("http://localhost:8080/status", function(data) { UpdateStatus(data);})}, 1000); Why?

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  • VIM plugin for updating C++ function definition

    - by Sunny
    I'm looking for a VIM plugin that can do these kind of thing. Let's say I have a function in a .cpp file void myFunction(int arg1, int arg2, int arg3){ //code } The function definition is defined in the .h file. So every time I change the function name or add a new argument to the function, I have to go back the the .h file to do the same. Is there a VIM plugin that can automate this task?

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  • Undefined function

    - by Luke
    Just a simple problem for most of you i'm sure. I have a function addTeamFixtures and it calls on a function flip. That function is defined later in the script. But I don't think it is happy with that. The code where it calls the function: $rounds[$round][0] = flip($rounds[$round][0]); Any ideas?

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  • disable Opera function key in javascript

    - by DonDon
    I'm writing javascript code for a web emulator containing function keys. The user is able to press keyboard function keys to process something in the emulator, I used stopPropagation and preventDefault javascript function to stop/cancel browsers invoking their function key shortcut (e.g. F1 will invoke Firefox to open its help page) and the code works fine under Firefox and Chrome. But Opera didn't work. I'm using latest Opera 10.5 here. Can anyone help ?

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  • Several buttons on one form calling same function

    - by user198003
    hi all, trying to develop web form using jquery. all i need is to have several (don't know how many) buttons on one form. all of those buttons have to call one same function, and to pass one parameter to that function. that function have to do some post method, but i can handle it. so, my main problem is that i don't know how to develop JS that will call specific jquery function. can you help me with this?

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  • sql user defined function

    - by nectar
    for a table valued function in sql why cant we write sql statements inside begin and end tags like- create function dbo.emptable() returns Table as BEGIN --it throws an error return (select id, name, salary from employee) END go while in scalar valued function we can use these tags like create function dbo.countemp() returns int as begin return (select count(*) from employee) end go is there any specific rule where we should use BEGIN & END tags

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  • jQuery - Call function once at end of each loop

    - by user668499
    How can I call a function once at the end of an each loop. This alerts 'finished' on each loop, I want it once when the loop has finished. $(function(){ var imgArr=[]; var lis = $('#gallery li') lis.each(function(){ imgArr.push(this.outerHTML); $(this).remove(); alertFun(); }) function alertFun(){ alert('finished'); } })

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  • PHP: Prevent a function from returning value?

    - by Industrial
    Hi everybody, How could I make sure that the startProcess(); function is being called, but without halting the execution for myFunction(). I'll guess that there's a way to call a function and prevent it from returning it's value to thereby accomplishing this? Pseudo-code: function myFunction() { startProcess(); return $something; } function startProcess() { sleep(5); // Do stuff that user doesn't should have to wait for. }

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  • Javascript Function Definitions

    - by Pierreten
    I was wondering why the Vector variable defined within this self executing javascript function doesn't require a var before it? Is this just some other type of syntax for creating a named function? Does this make it so we can't pass Vector as an argument to other functions? (function() { Vector = function(x, y) { this.x = x; this.y = y; return this; }; //...snip })()

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  • RUN FUNCTION AFTER SOMETIME IN JQUERY & AUTOMATIC SLICING OF IMAGES

    - by user2697032
    I am not being able to start the automatic slicing of images, it is happening only after a click, how should i modify my code so that i get to change the slicing of the images automatically. <!DOCTYPE html> <html lang="en"> <head> <title>Slicebox - 3D Image Slider</title> <meta charset="UTF-8" /> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta name="description" content="Slicebox - 3D Image Slider with Fallback" /> <meta name="keywords" content="jquery, css3, 3d, webkit, fallback, slider, css3, 3d transforms, slices, rotate, box, automatic" /> <meta name="author" content="Pedro Botelho for Codrops" /> <link rel="shortcut icon" href="../favicon.ico"> <link rel="stylesheet" type="text/css" href="css/demo.css" /> <link rel="stylesheet" type="text/css" href="css/slicebox.css" /> <link rel="stylesheet" type="text/css" href="css/custom.css" /> <script type="text/javascript" src="js/modernizr.custom.46884.js"></script> </head> <body onload="funct()"> <div class="container"> <div class="codrops-top clearfix"> <a href="http://tympanus.net/Development/AutomaticImageMontage/"><span>&laquo; Previous Demo: </span>Automatic Image Montage</a> <span class="right"> <a target="_blank" href="http://www.flickr.com/photos/strupler/">Images by <strong>ND Strupler</strong></a> <a href="http://tympanus.net/codrops/?p=5657"><strong>Back to the Codrops Article</strong></a> </span> </div> <h1>Slicebox <span>A fresh 3D image slider with graceful fallback</span></h1> <div class="more"> <ul id="sb-examples"> <li>More examples:</li> <li class="selected"><a href="index.html">Example 1</a></li> <li><a href="index2.html">Example 2</a></li> <li><a href="index3.html">Example 3</a></li> <li><a href="index4.html">Example 4</a></li> </ul> </div> <div class="wrapper" id="checkthis"> <ul id="sb-slider" class="sb-slider"> <li> <a href="http://www.flickr.com/photos/strupler/2969141180" target="_blank"><img src="images/1.jpg" alt="image1"/></a> <div class="sb-description"> <h3>Creative Lifesaver</h3> </div> </li> <li> <a href="http://www.flickr.com/photos/strupler/2968268187" target="_blank"><img src="images/2.jpg" alt="image2"/></a> <div class="sb-description"> <h3>Honest Entertainer</h3> </div> </li> <li> <a href="http://www.flickr.com/photos/strupler/2968114825" target="_blank"><img src="images/3.jpg" alt="image1"/></a> <div class="sb-description"> <h3>Brave Astronaut</h3> </div> </li> <li> <a href="http://www.flickr.com/photos/strupler/2968122059" target="_blank"><img src="images/4.jpg" alt="image1"/></a> <div class="sb-description"> <h3>Affectionate Decision Maker</h3> </div> </li> <li> <a href="http://www.flickr.com/photos/strupler/2969119944" target="_blank"><img src="images/5.jpg" alt="image1"/></a> <div class="sb-description"> <h3>Faithful Investor</h3> </div> </li> <li> <a href="http://www.flickr.com/photos/strupler/2968126177" target="_blank"><img src="images/6.jpg" alt="image1"/></a> <div class="sb-description"> <h3>Groundbreaking Artist</h3> </div> </li> <li> <a href="http://www.flickr.com/photos/strupler/2968945158" target="_blank"><img src="images/7.jpg" alt="image1"/></a> <div class="sb-description"> <h3>Selfless Philantropist</h3> </div> </li> </ul> <div id="shadow" class="shadow"></div> <div id="nav-arrows" class="nav-arrows"> <a href="#x">Next</a> <a href="#y">Previous</a> </div> <div id="nav-dots" class="nav-dots"> <span class="nav-dot-current"></span> <span></span> <span></span> <span></span> <span></span> <span></span> <span></span> </div> </div><!-- /wrapper --> <p class="info"><strong>Example 1:</strong> Default settings</p> </div> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script> <script type="text/javascript" src="js/jquery.slicebox.js"></script> <script type="text/javascript"> $(function() { var Page = (function() { var $navArrows = $( '#nav-arrows' ).hide(), $navDots = $( '#nav-dots' ).hide(), $nav = $navDots.children( 'span' ), $shadow = $( '#shadow' ).hide(), slicebox = $( '#sb-slider' ).slicebox( { onReady : function() { $navArrows.show(); $navDots.show(); $shadow.show(); }, onBeforeChange : function( pos ) { $nav.removeClass( 'nav-dot-current' ); $nav.eq( pos ).addClass( 'nav-dot-current' ); } } ), init = function() { initEvents(); }, initEvents = function() { // add navigation events $navArrows.children( ':first' ).on( 'click', function() { setInterval("callme()", 1000); return false; } ); //$(function(){ //callme(); //}); function callme(){ //$('#checkit').append("callme loaded<br />"); slicebox.next(); setInterval("callme()", 1000); } $navArrows.children( ':last' ).on( 'click', function() { slicebox.previous(); return false; } ); $nav.each( function( i ) { $( this ).on( 'click', function( event ) { var $dot = $( this ); if( !slicebox.isActive() ) { $nav.removeClass( 'nav-dot-current' ); $dot.addClass( 'nav-dot-current' ); } slicebox.jump( i + 1 ); return false; } ); } ); }; return { init : init }; })(); Page.init(); }); </script> <script> // make sure the "myContainer" id in the script is the same id of the div $(document).ready(function() { slicebox.next(); $('#nav-arrows').sbslider(); // this is the piece of code that will do the magic thing }); </script> </body> </html> I am not being able to start the automatic slicing of images, it is happening only after a click, how should i modify my code so that i get to change the slicing of the images automatically.

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  • jQuery sequence and function call problem

    - by Jonas
    Hi everyone, I'm very new to jquery and programming in general but I'm still trying to achieve something here. I use Fullcalendar to allow the users of my web application to insert an event in the database. The click on a day, view changes to agendaDay, then on a time of the day, and a dialog popup opens with a form. I am trying to combine validate (pre-jquery.1.4), jquery.form to post the form without page refresh The script calendar.php, included in several pages, defines the fullcalendar object and displays it in a div: $(document).ready(function() { function EventLoad() { $("#addEvent").validate({ rules: { calendar_title: "required", calendar_url: { required: false, maxlength: 100, url: true } }, messages: { calendar_title: "Title required", calendar_url: "Invalid URL format" }, success: function() { $('#addEvent').submit(function() { var options = { success: function() { $('#eventDialog').dialog('close'); $('#calendar').fullCalendar( 'refetchEvents' ); } }; // submit the form $(this).ajaxSubmit(options); // return false to prevent normal browser submit and page navigation return false; }); } }); } $('#calendar').fullCalendar({ header: { left: 'prev,next today', center: 'title', right: 'month,agendaWeek,agendaDay' }, theme: true, firstDay: 1, editable: false, events: "json-events.php?list=1&<?php echo $events_list; ?>", <?php if($_GET['page'] == 'home') echo "defaultView: 'agendaWeek',"; ?> eventClick: function(event) { if (event.url) { window.open(event.url); return false; } }, dayClick: function(date, allDay, jsEvent, view) { if (view.name == 'month') { $('#calendar').fullCalendar( 'changeView', 'agendaDay').fullCalendar( 'gotoDate', date ); }else{ if(allDay) { var timeStamp = $.fullCalendar.formatDate( date, 'dddd+dd+MMMM_u'); var $eventDialog = $('<div/>').load("json-events.php?<?php echo $events_list; ?>&new=1&all_day=1&timestamp=" + timeStamp, null, EventLoad).dialog({autoOpen:false,draggable: false, width: 675, modal:true, position:['center',202], resizable: false, title:'Add an Event'}); $eventDialog.dialog('open').attr('id','eventDialog'); } else { var timeStamp = $.fullCalendar.formatDate( date, 'dddd+dd+MMMM_u'); var $eventDialog = $('<div/>').load("json-events.php?<?php echo $events_list; ?>&new=1&all_day=0&timestamp=" + timeStamp, null, EventLoad).dialog({autoOpen:false,draggable: false, width: 675, modal:true, position:['center',202], resizable: false, title:'Add an Event'}); $eventDialog.dialog('open').attr('id','eventDialog');; } } } }); }); The script json-events.php contains the form and also the code to process the data from the submitted form. What happens when I test the whole thing: - first user click on a day, then time of day. Popup opens with time and date indicated on the form. When user submits the form, dialog closes and calendar refreshes its events.... and the event added by the user appears several times (from 4 to up to 11 times!). The form has been processed several times by the receiving php script?! - second user click, the popup opens, user submit empty form. Form is submitted (validate function not triggered) and user redirected to empty page json-events.php (ajaxForm not triggered either) Obviously, my code is wrong (and dirty as well, sorry). Why is the submitted form, submitted several time to receiving script and why is the javascript function EventLoad triggered only once ? Thank you very much for you help. This problem is killing me !

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  • function fetch() on a non-object problem

    - by shin
    I have this url, http://webworks.net/ww.incs/forgotten-password-verification.php?verification_code=974bf747124c69f12ae3b36afcaccc68&[email protected]&redirect=/ww.admin/index.php And this gives the following error. Fatal error: Call to a member function fetch() on a non-object in /var/www/webworks/ww.incs/basics.php on line 23 Call Stack: 0.0005 338372 1. {main}() /var/www/webworks/ww.incs/forgotten-password-verification.php: 0 0.0020 363796 2. dbRow() /var/www/webworks/ww.incs/forgotten-password-verification.php:18 The forgotten-password-verification.php require 'login-libs.php'; login_check_is_email_provided(); // check that a verification code was provided if( !isset($_REQUEST['verification_code']) || $_REQUEST['verification_code']=='' ){ login_redirect($url,'novalidation'); } // check that the email/verification code combination matches a row in the user table // $password=md5($_REQUEST['email'].'|'.$_REQUEST['password']); $r=dbRow('select * from user_accounts where email="'.addslashes($_REQUEST['email']).'" and verification_code="'.$_REQUEST['verification_code'].'" and active' ); if($r==false){ login_redirect($url,'validationfailed'); } // success! set the session variable, then redirect $_SESSION['userdata']=$r; $groups=json_decode($r['groups']); $_SESSION['userdata']['groups']=array(); foreach($groups as $g)$_SESSION['userdata']['groups'][$g]=true; if($r['extras']=='')$r['extras']='[]'; $_SESSION['userdata']['extras']=json_decode($r['extras']); login_redirect($url); And login-libs, require 'basics.php'; $url='/'; $err=0; function login_redirect($url,$msg='success'){ if($msg)$url.='?login_msg='.$msg; header('Location: '.$url); echo '<a href="'.htmlspecialchars($url).'">redirect</a>'; exit; } // set up the redirect if(isset($_REQUEST['redirect'])){ $url=preg_replace('/[\?\&].*/','',$_REQUEST['redirect']); if($url=='')$url='/'; } // check that the email address is provided and valid function login_check_is_email_provided(){ if( !isset($_REQUEST['email']) || $_REQUEST['email']=='' || !filter_var($_REQUEST['email'], FILTER_VALIDATE_EMAIL) ){ login_redirect($GLOBALS['url'],'noemail'); } } // check that the captcha is provided function login_check_is_captcha_provided(){ if( !isset($_REQUEST["recaptcha_challenge_field"]) || $_REQUEST["recaptcha_challenge_field"]=='' || !isset($_REQUEST["recaptcha_response_field"]) || $_REQUEST["recaptcha_response_field"]=='' ){ login_redirect($GLOBALS['url'],'nocaptcha'); } } // check that the captcha is valid function login_check_is_captcha_valid(){ require 'recaptcha.php'; $resp=recaptcha_check_answer( RECAPTCHA_PRIVATE, $_SERVER["REMOTE_ADDR"], $_REQUEST["recaptcha_challenge_field"], $_REQUEST["recaptcha_response_field"] ); if(!$resp->is_valid){ login_redirect($GLOBALS['url'],'invalidcaptcha'); } } basics.php is, session_start(); function __autoload($name) { require $name . '.php'; } function dbInit(){ if(isset($GLOBALS['db']))return $GLOBALS['db']; global $DBVARS; $db=new PDO('mysql:host='.$DBVARS['hostname'].';dbname='.$DBVARS['db_name'],$DBVARS['username'],$DBVARS['password']); $db->query('SET NAMES utf8'); $db->num_queries=0; $GLOBALS['db']=$db; return $db; } function dbQuery($query){ $db=dbInit(); $q=$db->query($query); $db->num_queries++; return $q; } function dbRow($query) { $q = dbQuery($query); return $q->fetch(PDO::FETCH_ASSOC); } define('SCRIPTBASE', $_SERVER['DOCUMENT_ROOT'] . '/'); require SCRIPTBASE . '.private/config.php'; if(!defined('CONFIG_FILE'))define('CONFIG_FILE',SCRIPTBASE.'.private/config.php'); set_include_path(SCRIPTBASE.'ww.php_classes'.PATH_SEPARATOR.get_include_path()); I am not sure how to solve the problem. Any help will be appreciated. Thanks in advance. UPDATE: My db CREATE TABLE IF NOT EXISTS `user_accounts` ( `id` int(11) unsigned NOT NULL AUTO_INCREMENT, `email` text, `password` char(32) DEFAULT NULL, `active` tinyint(4) DEFAULT '0', `groups` text, `activation_key` varchar(32) DEFAULT NULL, `extras` text, PRIMARY KEY (`id`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=10 ; INSERT INTO `user_accounts` (`id`, `email`, `password`, `active`, `groups`, `activation_key`, `extras`) VALUES (2, '[email protected]', '6d24dde9d56b9eab99a303a713df2891', 1, '["_superadministrators"]', '5d50e39420127d0bab44a56612f2d89b', NULL), (3, '[email protected]', 'e83052ab33df32b94da18f6ff2353e94', 1, '[]', NULL, NULL), (9, '[email protected]', '9ca3eee3c43384a575eb746eeae0f279', 1, '["_superadministrators"]', '974bf747124c69f12ae3b36afcaccc68', NULL);

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  • Beginner learning assembly preserving esp after function calls

    - by Daniel
    I'm a beginner learning some assembly, when preserving the ESP register before a function call does it matter if you do it by adding or subtracting? hard to explain, consider the following mov esi, esp sub esp, 12 // on 32bit OS this would mean that there are 3 arguments to the function // push, function call etc cmp esi, esp // should be the same or mov esi, esp // push, function call etc add esp, 12 cmp esi, esp // should be the same Also if for some reason the cmp fails, is it safe to do mov esp, esi to re-align the stack? Thanks EDIT: Also how come i need to do this for a call like sprintf, but MessageBox seems to fix ESP for me? How am i to know what function needs this and what doesn't?

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  • Implementation of ceil function in C.

    - by RBA
    Hi, I have two doubts regarding ceil function.. 1. The ceil() function is implemented in C. if i use ceil(3/2), it works fine.. But when i use ceil(count/2)-if value of count is 3, then it gives compile time error.. /tmp/ccA4Yj7p.o(.text+0x364): In function FrontBackSplit': : undefined reference toceil' collect2: ld returned 1 exit status How to use the ceil function in second case?? Please suggest.. 2. How can i implement my own ceil function in C. Please give some basic guidelines. Thanks.

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  • Nested function inside literal Object...

    - by Andrea
    Hello guys, if in a literal object i try to reference a function using "this" inside a nested property/function, this don't work. Why? A nested property have it's own scope? For example, i want to call f1 from inside d.f2: var object = { a: "Var a", b: "Var b", c: "Var c", f1: function() { alert("This is f1"); }, d: { f2: function() { this.f1(); } }, e: { f3: function() { alert("This is f3"); } } } object.f1(); // Work object.d.f2(); // Don't Work. object.e.f3(); // Work Thanks, Andrea.

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  • Calling Entity Framework function import from code

    - by Mikey Cee
    So I have a stored procedure called Spr_EventLogCreate defined in my database. I have created a function import in my data model called LogEvent with no return type, and I can see this function in the Model Browser tree at MyModel.edmx MyModel EntityContainer Function Imports LogEvent. I thought I should then be able to call the function in my code as follows: var context = new MyModelEntities(); context.LogEvent(...); But the LogEvent() method is not present. I must be being really stupid here, but how do I call my imported function? Using VS 2008 and EF 3.5.

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  • passing a fortran int array to C++ by calling C++ function in fortran

    - by cppb
    hi, I am trying to call a C++ function in FORTRAN subroutine. This C+ function is supposed to update an integer array. Here is a non-working code I wrote. Can someone please let me know what the issue is: ! FORTRAN function that calls a C++ function subroutine my_function() integer(4) ar(*) integer(4) get_filled_ar ! Need correct syntax here. ar = get_filled_ar() end // C++ function: extern "C" { void get_filled_ar(int *ar){ ar[0] = 1; ar[1] = 10; ar[3] = 100; } }

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  • Superfluous python parameters

    - by Leif Andersen
    I've noticed a discrepancy in the way that python parameters are called. In every other language I've dealt with, you either have foo() meaning either no parameters, or as many parameters as you like, or foo(arg1, arg2,...,argn) where you pass in the same number of parameters to define the function and call it. In python however, I've noticed that the function definitions, and when the function is called, can have two different parameters sets, this usually consists of: class foo(object): def bar(self, arg1, arg2): pass However, when I want to call the function, all I have to do is: zoo = foo() zoo.bar(arg1, arg2) Where did the self parameter go? Thank you.

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  • Python ttk.Button -command, runs without button being pressed

    - by Markus Kothe
    I'm making a small script in python with ttk and I have a problem where a function runs where it shouldn't. The button code looks as follows: btReload = ttk.Button(treeBottomUI, text="Reload", width=17, command=loadModelTree(treeModel)) btReload.pack(side="left") and the function is as this: def loadModelTree(tree): print ("Loading models...") allModels = os.listdir(confModPath) for chunk in allModels: ... For some reason, the function runs without the button being pressed. Why?

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  • Calling Oracle Function with "complex" return value from C#

    - by devdimi
    I have an Oracle function returning record defined in the package, so one can do: select a,b,c FROM my_function(...); Calling this oracle function from .NET is as simple as executing normal sql query. Unfortunately the function has to do updates now and when it is called like this Oracle complains that updates are not allowed within selects and that makes sense. So now I am left with the choice to change the function call or to split the function. Basically I have to get rid of the select in the function call and need something like this in C#: EXEC :var:= my_func(...); where the type of var is custom tuple defined in the package. I have already tried using ParameterDirection.ReturnValue without success. Does anyone have an idea?

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  • Get page permalink and title outside the loop in wordpress

    - by Aakash Chakravarthy
    Hello, How to Get page permalink and title outside the loop in wordpress. I have a function like function get_post_info(){ $post; $permalink = get_permalink($post->ID); $title = get_the_title($post->ID); return $post_info('url' => $permalink, 'title' => $title); } when this function called within the loop, it returns the post's title and url. When it is called outside the loop. It is not returning the current page's title and url. When called in home page it should return the home page's title and url How to get like this ? instead this function returns the latest posts title and url

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