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  • C++ corrupt my thinking, how to trust auto garbage collector?

    - by SnirD
    I use to program mainly with C/C++, that's make me dealing with pointers and memory management daily. This days I'm trying to develop using other tools, such as Java, Python and Ruby. The problem is that I keep thinking C++ style, I'm writing code as C++ usually written in almost every programming language, and the biggest problem is the memory management, I keep writing bad code using references in Java and just get as close as I can to the C++ style. So I need 2 thinks here, one is to trust the garbage collector, let's say by seeing benchmarks and proofs that it's realy working in Java, and know what I should never do in order to get my code the best way it can be. And the second think is knowing how to write other languages code. I mean I know what to do, I'm just never write the code as most Java or Python programmers usually do, are there any books for C++ programmers just to introduce me to the writing conventions? (by the way, forgive me for my English mistakes)

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  • Disable (and re-enable) the href and onclick on elements

    - by jibees
    Hello I just want to enable / disable onclick and href on elements (a or div). I don't know how to do this. I can disable onclick by adding an handler on click event, but the href is still available. $(this).unbind().click(function(event){ event.preventDefault(); return; }); FOUND A HACK FOR A ELEMENTS if ($(this).attr("href")) { $(this).attr("x-href", $(this).attr("href")); $(this).removeAttr("href"); }

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  • Why is post() not updating the DOM after it returns? Wierd timing problem observed.

    - by Sephrial
    Hi all, I have the following code that is really bugging me, I'm thinking perhaps the post() function needs to be blocking. I am new to jQuery(latest version) and AJAX, but I'm using ColdFusion which returns some HTML in the data variable. var dataResult; var statusResult; $.post('fh_result.cfm',$('#myform').serialize(),function(data,status){ dataResult = data; statusResult = status; }); //alert(statusResult); if ('success' == statusResult) { alert(statusResult); $('#result').html(dataResult); } When I uncomment out the first alert, it returns 'undefined' but then it goes into the if block and the next alert box it says 'success'. If I comment out that line it doesn't make it into the if statement at all. My guess is that I want to make this a blocking call or something because I want to insert the data on the page after the post. I also have a problem when I re-write the top code as follows: var dataResult; var statusResult; $.post('fh_result.cfm',$('#myform').serialize(),function(data,status){ dataResult = data; statusResult = status; alert(statusResult); $('#result').html(dataResult); }); //alert(statusResult); Now in this case, the alert says 'success' when I comment out the second alert box. When I uncomment it out, I get one alert that says success and the other that says undefined, but this time it updates the DOM with the result of the postback as desired. How can I do this without the alert box?

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  • Another way to handle a common JQuery event handling pattern

    - by bradgonesurfing
    I have the following code for example $("a.foo").bind(function (e){ var t; if ( $(e.target).is("a") ){ t = $(e.target); }else{ t = $(e.target).parent("a"); } var data = t.attr("data-info"); }); In english. I might have a list of anchors within which there may be a number of spans. Each anchor is declared as <a class="foo" href="#" data-info="1"> <span> ... </span> <span> ... </span> </a> <a class="foo" href="#" data-info="2"> <span> ... </span> <span> ... </span> </a> ... ... I bind a handler to the click event of the anchor but the event object comes back with the anchor OR one of the spans depending on where I click. So to get my html5 "data-info" value into the callback I have to insert a bit of messy code. This is now appearing throughout my code to the point where I am guessing there might be an idiomatic JQuery way of handling this.

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  • SDL (And Others) Virtual Key Input

    - by David C
    Today I set up the input in my application for all the different keys. This works fine except for virtual keys, for example, caret or ampersand. Keys that normally need shift to be got at. Using SDL these virtual keys don't work. As in they do not register an event. if (event.type == SDL_KEYDOWN) { switch (event.key.keysym.sym) { case SDLK_CARET: Keys[KeyCodes::Caret] = KeyState::Down; break; case SDLK_UP: Keys[KeyCodes::Up] = KeyState::Down; break; default: break; } I am absolutely sure my system works with physical keys like Up. The program queries a keystate like so: if (Keys[KeyCode] == KeyState::Down) { lua_pushboolean(L, true); } else { lua_pushboolean(L, false); } KeyCode is passed in as an argument. So why are virtual keys, or keys that need shift to get at not working using SDL's KeyDown event type? Is more code needed to get to them? Or am I being stupid?

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  • If element has been 'mouseover'ed for 500ms, run function with jQuery

    - by PaulAdamDavis
    For the sanity of my users, I want a 'mouseover' event to run after the selector has been hovered for half a second rather than as soon as they hover it. I first tried a setTimeout function but that runs however long the element has been hovered, I didn't think it through too much I guess. I've also spent a day (on and off) searching (and playing Pacman) ti no result, unless I'm searching for the wrong things. I would like to keep this plugin-less if we can, purely for run speed & maintainability. $("#mySelector").mouseover(function(){ // Run after 500ms $(this).addClass("hasBeen500ms"); }); Let's see if we can crack this, I know it will have so many applications!

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  • Bind event to a div appearing

    - by AndyC
    Can I create an event so I can execute some javascript whenever an element with a specific ID becomes visible or appears on the page? The element comes from a remote resource (so isn't in MY html code but appears on page load) and I'd like some code to run when it appears (and only if it appears, it may not appear every load). Thanks!

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  • Switching back into the middle of a function in Actionscript

    - by J.Ded.
    I need to return to my original function after capturing an event (downloading something) with another function. The original function needs to return a value, which depends on the downloaded data. So, I'd like to pause original function for the time needed for the download and the eventhandler function to complete it's work, and resume it afterwards. The obvious way is to set a flag value (both the original function and the eventhandler are within the same class) and make the original function check it until the eventhandler function changes the flag. But that would be wasteful, and my AS is slow enough already:) [other parts of the application utilise some heavy graphics]. Is there another way? Like an event that gets captured "in the middle" of the function? Or some other form of flow control?

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  • Problem with Firefox, javascript, and Canvas

    - by Rob
    I'm having a Firefox-specific issue with a script I wrote to create 3d layouts. The correct behavior is that the script pulls the background-color from an element and then uses that color to draw on the canvas. When a user mouses over a link and the background-color changes to the :hover rule, the color being drawn changes on the canvas changes as well. When the user mouses out, the color should revert back to non-hover color. This works as expected in Webkit browsers and Opera, but Firefox chokes on it if mouseout is triggered and no mouseover event follows it. This is easier to see than for me to describe, and it's too much code to post here, so here is a link: http://www.robnixondesigns.com/strangematter/

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  • alert the object

    - by user295189
    I am setting an object like this n.name = n.name.join(String.fromCharCode(255)); n.description = n.description.join(String.fromCharCode(255)); I want to be able to alert(n); but it tells me [Object] is there a way to alert complete object? thanks

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  • jQuery: How do I insert an html string an arbitrary number of times (i.e. not with an each() function)?

    - by Sam Bivins
    I just need to take a certain html query object and append it to an html element a lot of times. I have this: var box = $("<div class='box'>&nbsp</div>"); $("#firstbox").after(box); and it works fine, but it just adds one 'box' after the #firstbox element. I'd like to do something like this: var box = $("<div class='box'>&nbsp</div>"); $("#firstbox").after(box * 6000); so that it will insert 6000 copies of that 'box' html, but this is not working. This is I'm sure the easiest thing to do, but I can't seem to find how to multiply actions like this without using the each() function, which doesn't apply here because I don't have 6000 of anything on my page. Thanks.

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  • c# event and delegate question

    - by user359562
    I want to detach the custom event but could not detach. Please find below I am using -= to detach the event. I assume after this, TextChanged2 method should not be invoked as I have unregistered the event. Let me know if my understanding is wrong. public delegate void TextChangedEventHandler1(object sender, TextBoxargs ta); public event TextChangedEventHandler1 TextChanged1; private void textBox1_TextChanged(object sender, EventArgs e) { this.TextChanged1 -= new TextChangedEventHandler1(TextChanged2); TextChanged2(sender, e); } public void TextChanged2(object sender, EventArgs e) { textBox1.Text = textBox1.Text.ToUpper(); }

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  • ASP.net PreInit() Vs Init()

    - by ASP.netBeginner
    From local forum i understood that PreInit can be used to handle the following PreInit() >Master pages can be called dynamically >Themes can be set dynamically >Programatically add controls to controls collection and i read Init() is for Init() In this event, we can read the controls properties (set at design time). We cannot read control values changed by the user because that changed value will get loaded after LoadPostData() event fires. Question I am not getting the point "We cannot read control values changed by the user".Where do users change the value of control?.Example would help me to understand the point.

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  • jQuery responds to click() differently for user and programmatic triggers

    - by Moss
    Here's the code: this.Form.find("input[type=checkbox]").click(function(event) { if ($(this).is(":checked")) { console.log("checked"); } else { console.log("unchecked"); } }); If the checkbox is not checked, and I click with the mouse, I get "checked". If I trigger it programmatically like $("#someCheckbox").click(), I get "unchecked". How to make the two behave the same way?

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  • Clear All Event subscriptions (Clone linked)

    - by mattias
    I just implemented Clone from ICloneable and realized that the event subscriptions from my source instance also followed. Is there a good way to clear all those? Currently I am using a couple of these loops for every event I have to clear everything. foreach (var eventhandler in OnIdChanged.GetInvocationList()) { OnIdChanged -= (ItemEventHandler) eventhandler; } foreach (var eventhandler in OnNameChanged.GetInvocationList()) { ... This works fine but clutters the code a bit. Mostly worried to get event dangling.

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  • How to hook onclick event for each cell in a table in Javascript?

    - by MartyIX
    I was thinking if there's a better solution for adding onclick handler to each cell in a table than this approach: http://stackoverflow.com/questions/1207939/adding-an-onclick-event-to-a-table-row Better in the way that I wouldn't need to set "cell.onclick = function" for each cell. I just need to get the coordinations of a cell where user clicked. Thanks!

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  • Preventing click event with jQuery drag and drop

    - by Sasha Yanovets
    I have an elements on page that are draggabe with jQuery. These elements have click event wich navigates to another page (ordinary links for example). What is the best way to prevent click from firing on dropping such element, while allowing clicking it in not drag and drop state? I have this problem with sortable elements, but think it is good to have solution for general drag and drop. I've solved the problem for myself. After that found that same solution exists for Scriptaculous, but maybe someone have a better way to achieve that.

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  • Results page in other window.

    - by xRobot
    I have this simple form: <form method="post" action"."> <input type="text" name="title"> <input type="submit" name"send"> </form> I want that when a user click on submit, then will be open another window of browser with the results. Is it possible ?

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  • Adding image to html markup

    - by user1491991
    Hello guys i'm having a problem appending a image to my html markup which is generated when a button is clicked... wondering if i could some dirction __--------------------------SCRIPT----------------------------------------------------------- (function($){ $.confirm = function(params){ if($('#confirmOverlay').length){ // A confirm is already shown on the page: return false; } var buttonHTML = ''; $.each(params.buttons,function(name,obj){ // Generating the markup for the buttons: buttonHTML += '<a href="#" class="button '+obj['class']+'">'+name+'<span></span></a>'; if(!obj.action){ obj.action = function(){}; } }); var closetext= 'close'; var markup = [ '<div id="confirmOverlay">', '<div id ="model">','<div id="confirmBox">', '<div id="header">','<div id ="title">',params.title,'</div>', '<div id="close">','<ol id = "olclose">','<li id = "liclose">','<a id="close" href = "#">',closetext,'</a></li>', '<li id = "liclose">','<a id="close" href = "#">','<img src="../modal-close.gif"/>','</a></li>','</ol></div></div>', '<div id ="textbox">','<p>',params.message,'<br>','<br>' ,buttonHTML,'</p>', '</div>', '</div></div></div></div>' ].join(''); $(markup).hide().appendTo('body').fadeIn(); var buttons = $('#confirmBox .button'), i = 0; $.each(params.buttons,function(name,obj){ buttons.eq(i++).click(function(){ // Calling the action attribute when a // click occurs, and hiding the confirm. obj.action(); $.confirm.hide(); return false; }); }); } $.confirm.hide = function(){ $('#confirmOverlay').fadeOut(function(){ $(this).remove(); }); } })(jQuery); i've used firebug to check and its unable to fetch the image here

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  • How could I click in a control and drag (not Drag and Drop) out of it but still follow the event as

    - by Jelly Amma
    Hello, I would like to allow the user to click within my UserControl and drag left/right to zoom in/out but I'd like the dragging not to be restricted to the actual control's boundaries. What sort of event or strategy would be the right way to track the mouse position outside the control and the form until the mouse click is released ? Thanks in advance for any help or advice.

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