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  • Creating a jQuery plugin: best practices regarding functions' visibility?

    - by marcgg
    I'm creating a jQuery plugin. So far it's working fine, but I'm having doubt about the way I'm doing things: jQuery.fn.myMethod = function() { return this.each(function(){ MyScope.doSomething(jQuery(this).attr("id")); }); }; var MyScope = { doSomething: function(id){ // something doSomethingElse(23); // some more code doSomethingElse(55); }, doSomethingElse: function(someInt){ // some code } }; I use MyScope to store all my "private" functions. I don't want the user to be able to go $("p").doSomething(), but I do need to use them. I could move everything in the myMethod function, but it would create a 100 lines long function and people would hate me for it. What's the best practices in this situation? Are there any great tutorials out there regarding this?

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  • Generate syntax tree for simple math operations

    - by M28
    I am trying to generate a syntax tree, for a given string with simple math operators (+, -, *, /, and parenthesis). Given the string "1 + 2 * 3": It should return an array like this: ["+", [1, ["*", [2,3] ] ] ] I made a function to transform "1 + 2 * 3" in [1,"+",2,"*",3]. The problem is: I have no idea to give priority to certain operations. My code is: function isNumber(ch){ switch (ch) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': case '.': return true; break; default: return false; break; } } function generateSyntaxTree(text){ if (typeof text != 'string') return []; var code = text.replace(new RegExp("[ \t\r\n\v\f]", "gm"), ""); var codeArray = []; var syntaxTree = []; // Put it in its on scope (function(){ var lastPos = 0; var wasNum = false; for (var i = 0; i < code.length; i++) { var cChar = code[i]; if (isNumber(cChar)) { if (!wasNum) { if (i != 0) { codeArray.push(code.slice(lastPos, i)); } lastPos = i; wasNum = true; } } else { if (wasNum) { var n = Number(code.slice(lastPos, i)); if (isNaN(n)) { throw new Error("Invalid Number"); return []; } else { codeArray.push(n); } wasNum = false; lastPos = i; } } } if (wasNum) { var n = Number(code.slice(lastPos, code.length)); if (isNaN(n)) { throw new Error("Invalid Number"); return []; } else { codeArray.push(n); } } })(); // At this moment, codeArray = [1,"+",2,"*",3] return syntaxTree; } alert('Returned: ' + generateSyntaxTree("1 + 2 * 3"));

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  • How do I retrieve and display html/asp/aspx page on different host using jQuery ajax?

    - by user717236
    I have an html page, which is a dynamically created asp/aspx page on http://host2.mydomain.com. I have no control over the html page. I cannot modify it in any such way. I cannot modify this page; so, setting document.domain is out of the question, unfortunately. I want to retrieve and display this page on http://host1.mydomain.com/page1.jsp using Ajax. FYI: host1 is being served by IIS 7 and Apache Tomcat (for JSP pages). And host2 is using IIS 7 and ASP. How can I retrieve this page using a Ajax POST request? Thank you.

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  • Trouble decoding JSON string with PHP

    - by Anthony
    I'm trying to send an array of objects from JS to PHP using JSON. I have an array of players as follows: var player; var players = new Array(); //loop for number of players player = new Object(); player.id = theID; players[i] = player; Then my AJAX call looks like this: JSONplayers = JSON.stringify(players); $.ajax({ type: "POST", url: "php/ajax_send_players.php", data: { "players" : JSONplayers } On the PHP side the decode function looks like this $players = $_REQUEST['players']; echo var_dump($players); $players = json_decode($players); echo 'players: ' .$players. '--'. $players[0] . '--'. $players[0]->id; Debugging in chrome, the JSON players var looks like this before it is sent: JSONplayers: "[{"id":"Percipient"},{"id":"4"}]" And when I vardump in PHP it looks OK, giving this: string(40) "[{\"id\":\"Percipient\"},{\"id\":\"4\"}]" But I can't access the PHP array, and the echo statement about starting with players: outputs this: players: ---- Nothing across the board...maybe it has something to do with the \'s in the array, I am new to this and might be missing something very simple. Any help would be greatly appreciated. note I've also tried json_decode($players, true) to get it as an assoc array but get similar results.

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  • Toggling audio on click?

    - by angela
    please look at this fiddle http://jsfiddle.net/rabelais/yLdkj/1/ The above fiddle shows three bars that on hover play audios. How do I change this so the music plays and pauses on click instead. Also if one audio is playing and another is clicked how can the already playing song pause? $("#one").mouseenter(function () { $('#sound-1').get(0).play(); }); $("#one").mouseleave(function () { $('#sound-1').get(0).pause(); }); $("#two").mouseenter(function () { $('#sound-2').get(0).play(); }); $("#two").mouseleave(function () { $('#sound-2').get(0).pause(); }); $("#three").mouseenter(function () { $('#sound-3').get(0).play(); }); $("#three").mouseleave(function () { $('#sound-3').get(0).pause(); });

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  • cycle through spans on jquery click, removing the first-child

    - by jacob
    Basically, this advances to the next hidden span when clicked. The markup: <div id="facts"> <span>click to cycle</span> <span>fact 1</span> <span>fact 2</span> <span>fact 3</span> <span>fact 4</span> </div> The js: $(document).ready(function() { var current = 1; $('#facts span').click(function() { // Hide all of them $('#facts span').hide(); // Unhide the current one: $('#facts span:eq(' + (current % $('#facts span').length) + ')').show(); // Increment the variable console.log(current % 4); current++; }); // Unhide the first one on load $('#facts span:first-child').show(); });? What I'm trying to do now is remove the first span after it's been clicked, because it is not necessary for the user to see the 'click to cycle' instruction again.

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  • Show Hide Subnav

    - by Jon
    How can I toggle the subnav for each item, and if one is open, hide the open one to show the current one? If there are none shown, just toggle. If you click one and show subnav then and click another hide previous and show current. Here is my html - <header> <div class="content-wrapper"> <div class="user-menu-wrapper"> <div class="hsn-logo"></div> <div class="user-greeting-wrapper"> <div class="user-greeting">Hi, Abraham</div> </div> <div class="user-menu"> <ul class="user-menu-items"> <li>@Html.ActionLink(" ", "Index", "Home", new { @class = "my-account" })</li> <li>@Html.ActionLink(" ", "Index", "Home", new { @class = "my-favorites" })</li> <li>@Html.ActionLink(" ", "Index", "Home", new { @class = "my-bag" })</li> </ul> </div> </div> <div class="hsn-nav-wrapper"> <div class="hsn-nav"> <ul class="hsn-nav-items"> <li style="width: 25%"> <a class="shop" href="#"> <span class="hsn-nav-item-wrap"> <span>SHOP</span><span class="drop-down-arrow"></span> </span> </a> </li> <li style="width: 25%"> <a class="watch" href="#"> <span class="hsn-nav-item-wrap"> <span>WATCH</span><span class="drop-down-arrow"></span> </span> </a> </li> <li style="width: 25%"> <a class="play" href="#"> <span class="hsn-nav-item-wrap"> <span>PLAY</span><span class="drop-down-arrow"></span> </span> </a> </li> <li style="width: 15%"> <a href=""><span class="hsn-search-icon"></span> </a> </li> </ul> </div> <br class="clear" /> </div> </div> </header> <subnav id="shop" class="shop-subnav"> <div class="hsn-subnav-wrapper"> <div class="hsn-subnav"> <div class="hsn-subnav-left"> <ul> <li>SubnavItem</li> <li>SubnavItem</li> <li>SubnavItem</li> <li>SubnavItem</li> <li>SubnavItem</li> <li>SubnavItem</li> <li>SubnavItem</li> <li><span class="hsn-subnav-callout">Deals</span></li> </ul> </div> <div class="hsn-subnav-right"> <ul> <li>SubnavItem</li> <li>SubnavItem</li> <li>SubnavItem</li> <li>SubnavItem</li> <li>SubnavItem</li> <li>SubnavItem</li> <li>SubnavItem</li> <li><span class="hsn-subnav-callout">Clearance</span></li> </ul> </div> </div> </div> </subnav> <subnav id="watch" class="watch-subnav"> <div class="hsn-subnav-wrapper"> <div class="hsn-subnav"> <div class="hsn-subnav-left"> <ul> <li>SubnavItem2</li> <li>SubnavItem2</li> <li>SubnavItem2</li> <li>SubnavItem2</li> </ul> </div> <div class="hsn-subnav-right"> <ul> <li>SubnavItem2</li> <li>SubnavItem2</li> <li>SubnavItem2</li> <li>SubnavItem2</li> </ul> </div> </div> </div> </subnav> Here is my Jquery / JS - $(document).ready(function () { $('ul.hsn-nav-items li a').click(function () { var navitem = $(this).attr('id') , id = $(this).attr('class') , subnav = $('subnav.' + id + '-subnav'); $('a.selected').not(this).removeClass('selected'); $(this).toggleClass('selected'); $('#'+id).toggle(); }); });

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  • Detecting Screen Resolution to load alternative CSS a good idea?

    - by jdln
    Im working with a graphic designer who constantly wants to make websites larger than the 960 pixels i recommend. I can do a certain amount with liquid layouts but id really love to be able to load different CSS for larger resolutions. I googled it and found the link below, but im worried that I havnt heard more about this. Is this is a reliable method? Im concerned as I would have thought that more people would want to do this. http://www.ilovecolors.com.ar/detect-screen-size-css-style/ Thanks

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  • How to find scrollable elements in DOM using XPath?

    - by ak.
    Basically I need to find all elements on the page that have a scrollbar (vertical or horizontal) How to tell if an element has a scrollbar and can actually be scrolled? I found this code snippet on jsperf. Is it possible to capture the logic behind the code into and XPath expression? Or are there any other ways to check for scrollbars? Added: Just to explain what I'm trying to do: I'm developing extension for Firefox. Basically it introduces Vim-style mouseless shortcuts (I know there is Vimperator and Pentadactyl...). One of the features I'd like to implement is to allow the use to select the container that's scrolled with j/k keys. That's why I need to discover all scrollable elements on any given random page.

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  • Update graph in real time from server

    - by user1869421
    I'm trying to update a graph with received data, so that the height of the bars increase as more data is received from the server via a websocket. But my code doesn't render a graph in the browser and plot the data points. I cannot see anything wrong with the code. I really need some help here please. ws = new WebSocket("ws://localhost:8888/dh"); var useData = [] //var chart; var chart = d3.select("body") .append("svg:svg") .attr("class", "chart") .attr("width", 420) .attr("height", 200); ws.onmessage = function(evt) { var distances = JSON.parse(evt.data); data = distances.miles; console.log(data); if(useData.length <= 10){ useData.push(data) } else { var draw = function(data){ // Set the width relative to max data value var x = d3.scale.linear() .domain([0, d3.max(useData)]) .range([0, 420]); var y = d3.scale.ordinal() .domain(useData) .rangeBands([0, 120]); var rect = chart.selectAll("rect") .data(useData) // enter rect rect.enter().append("svg:rect") .attr("y", y) .attr("width", x) .attr("height", y.rangeBand()); // update rect rect .attr("y", y) .attr("width", x) .attr("height", y.rangeBand()); var text = chart.selectAll("text") .data(useData) // enter text text.enter().append("svg:text") .attr("x", x) .attr("y", function (d) { return y(d) + y.rangeBand() / 2; }) .attr("dx", -3) // padding-right .attr("dy", ".35em") // vertical-align: middle .attr("text-anchor", "end") // text-align: right .text(String); // update text text .data(useData) .attr("x", x) .text(String); } useData.length = 0; } } Thanks

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  • How to change the css class="current" when using page jumping (single page website)?

    - by Bryan
    Morning, I must be asking google all the wrong questions, because I can't find anything similar. I have a standard navigation list, but I'm using page jumping because I wanted a single web page. <ul> <li><a href="#livestream">Livestream</a></li> <li><a href="#media">Media</a></li> <li><a href="#crew">Crew</a></li> <li><a href="#services">Services</a></li> <li><a href="#contact">Contact</a></li> </ul> But I can't for the life of me figure out how to make the class="current" when using page jumping. I've tried this bit of jquery because it appears to be what I'm looking for, but it did nothing. I don't think it'll work for #links. Any ideas?

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  • From me friends, know who is already using the app

    - by Toni Michel Caubet
    I got working to get all friends from 'me' user, like this: FB.api('/me/friends?fields=id,name,updated_time&date_format=U&<?=$access_token?>', {limit:3, function(response){ console.log('Friend name: '+response.data[0].name); } ); But i need to get if the user is in the app already or not, how can I alter the query to get an extra row in the object 'is_in_app' true/false? FB.api('/me/friends?fields=id,name,updated_time&date_format=U&<?=$access_token?>', {limit:3, function(response){ var text = 'is not in app'; if(response.data[0].is_in_app == true) text = 'is in app!!'; console.log('Friend name: '+response.data[0].name + ' ' + text); } ); How can i achieve this?

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  • DIV with text over an image on hover.

    - by Dylan Taylor
    OKay first off this is really really similiar to the http://dribbble.com homepage. In the simplest form possible. I have an image, and i'm trying to CSS it so that when i hover over the image, a DIV shows up with some text and a partially transparent background color. I have no idea how to do this..

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  • Can I embed video on external sites while still using tokens to protect the content?

    - by JKS
    On our own website, it's easy to protect against direct links to our video content by grabbing a token through AJAX and verifying the token through PHP before the file download is started. However I'm also researching how I could provide an embed feature, like YouTube or vimeo etc., without compromising this security feature. The problem is that the embed code I want to provide should look something like <object>...<embed>...</embed></object> -- but I don't know how to grab and append the token to the filename. I mean, I guess I could attach a script that did some gnarly JNOP business, but that's too dirty. I'm using JW Player for the actual video container. Huge thanks to anyone who can help...

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  • How do I modify this jQuery :submit selector example?

    - by Tommy
    Looking at this jQuery example, how can I modify the code so that it only changes the color of the cell if the value of the submit button in that cell is a certain value. i.e.- var submitEl = $("td :submit") //Only do the below if the submit buttons value is "XYZ" .parent('td') .css({background:"yellow", border:"3px red solid"})

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