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  • Most useful techniques for two way data binding with js

    - by Perpetualcoder
    With abundance of web services and client side templating features of jQuery and likes, creating mashups or sites consuming a multitude of web services and posting data back to these services is becoming exceedingly popular. For a page of decent size with this kind of architecture, say a dashboard. What are the useful techniques of maintaining this client side state. In other words whats are some of the ways to do two way databinding? Sample scenario: Get Data From Service as JSON/XML Display/Bind on UI Capture User Input Recreate request from the UI controls/html Post Data To Service Get Response and Rebind

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  • overriding previously-bound click events

    - by JamesBrownIsDead
    When I use this code with an element whose id is "foobar": $("#foobar").click(function () { alert("first"); }); $("#foobar").click(function () { alert("second"); }); I get two alerts: "first" and "second" second. How do I specify a click event that also clears out any previous click events attached to the element? I want the last $("#foobar").click(...) to erase any previously bound events.

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  • How to hide first item from an Html Select Tag

    - by Emanuel
    I have the following code: <select> <option value="0">Option 0</option>. <option value="1">Option 1</option> <option value="2">Option 2</option> </select> When you click on select I wish the first item to be no longer listed. Also it must work on all browsers. How can this be done? Thanks.

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  • Lowering document.domain

    - by Sergej Andrejev
    What am I doing wrong? According to specs lowering domain with javacript should be possible in IE8 and IE7 but my code only wors in FF and throws Argument Exception in IE <html xmlns="http://www.w3.org/1999/xhtml" > <body onload="alert(document.domain); try { document.domain = 'if.se' } catch(e) { alert(e); }; alert(document.domain);"> </body> </html>

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  • PHP Code to Generate Simple Flowchart

    - by revbackup
    I am making a flowchart out the subjects in the curriculum of our school. a flowchart is generated through its preRequisite.... for example FIRST YEAR FIRST SEMESTER SUBJECTS ---- PREREQUISITE MATH 1 ---- NONE MATH 2 ---- NONE ENGL 1 ---- NONE SOCIO 1 ----- NONE POLSCI 1 ----- NONE FIRSTE YEAR SECOND SEMESTER SUBJECTS ---- PREREQUISITE MATH 3 ----- MATH 1 MATH 4 ----- MATH 2, MATH 1 ENGL 2 ----- ENGL 1 POLSCI 2 ----- POLSCI 1 So, I must print it this way, just using simple PHP but difficult Logic.: MATH1 -----> MATH3 -----> MATH4 MATH 2 ----->MATH 4 ENGL1 -----> ENGL 2 SOCIO 1 POLSCI 1 -----> POLSCI 2 Can anyone give me a good algorithm for this, because this is really difficult. I am planning to echo the results in an HTML table, and it makes it more complicated. Do you have suggestions how to solve this problem properly and display the results also properly???? Thank you in advance!

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  • Google Map API V3 geocoder not showing the correct place

    - by TTCG
    I am upgrading my codes from Google Map API V2 to V3. In V2, I used GlocalSearch to get the latitude and longitude for the given address. In V3, I saw google.maps.Geocoder() and try to get the similar detail. However, the lat & long given by the V3 function is not accurate. Pls see the following screenshot here: My codes for V3 are as follow: var geocoder = new google.maps.Geocoder(); function codeAddress(address) { if (geocoder) { address = address + ", UK"; geocoder.geocode( { 'address': address}, function(results, status) { if (status == google.maps.GeocoderStatus.OK) { var latlng = results[0].geometry.location; addMarker(latlng); //Adding Marker here } else { alert("Geocode was not successful for the following reason: " + status); } }); } } Is there better way to get the accurate result in API V3? Thanks.

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  • HTML wrapper div over embedded flash object cannot be "clickable" by jQuery

    - by Michael Mao
    Hi all: I've been trying to do as the client requested : redirect to campaign page then to destination page once a customer clicks on the top banner in swf format. You can check what's been done at :http://ausdcf.org If you are using Firefox, Chrome or Safari, I suspect you can reach the destination page. However, if you are using IE or Opera, I doubt it. I think to cause of such a weird problem is: The swf ojbects don't have a link to url, SO I have to hack the theme template file like this : <div id="header">'; /* * A quick and dirty way to put some swf into PHP, and rotate among them ... */ //available banners $banners = array( 'http://localhost/smf/flash/banner_fertalign_1.swf', 'http://localhost/smf/flash/banner_fertalign_2.swf', 'http://localhost/smf/flash/banner_fertalign_3.swf' ); //get random banner srand((double) microtime() * 1000000); $rand = rand(0,count($banners)-1); echo '<div id="top_banner_clickable">'; echo '<div id="top_banner_wrapper">'; echo '<object width="400" height="60">'; echo '<param name="wmode" value="transparent">'; echo '<embed wmode="transparent" src="'.$banners[$rand].'" '; echo 'width="400" height="60" type="application/x-shockwave-flash"'; echo 'pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" />'; echo '</object>'; echo '</div>'; echo '</div>'; And the related jQuery code is like this: /* master.js */ $(document).ready(function() { $("#top_banner_clickable").click(function() { window.location ="http://ausdcf.org/campaign/"; }); }); I absolutely know nothing about Flash or embedded objects. I guess that's the cause of this problem. Plus, I don't know why it works with some browsers but not all... I even tried to add a z-index to the wrapper div in css like this: #top_banner_clickable { z-index : 100; } No this wouldn't do, either... Is there a way to go around this issue? Many thanks in advance.

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  • lots of backbone views - performance issues?

    - by ksol
    tl;dr: I wonder if having lots (100+ for the moment, potentially up to 1000/2000 or more) of backbone views (as a cell of a table) is too heavy or not The project I'm working on revolves around a planning view. There one row per user that covers 6 hours of a day, each hour splitted in 4 slots of 15mn. This planning is used to add "reservations" when clicking on a slot, and should handle hovering of the correct slots, and also handle when it is NOT possible to make a reservation - ie. prevent user click on an "unavailable" slot. There is many reasons why a slot can't be clicked on: the user is not available at this time, or the user is in a reservation; or the app needs to "force" a delay slot between two reservations. Reservations (a div) are rendered in a slot (a cell of a table), and by toying with dimensions, hovers the right number of slots. All this screen is handled with backbone. So For each slot I'm hovering on, I need to check wether I can do a reservation here or not. As of this moment, I use this by toying with the data attributes on the slots : when a reservation object is added, the slots covered are "enhanced with (among others) the reservation object (the backbone view object). But in some cases I don't quite have a grasp on now, it mixes up, and when the reservation view is removed, the slots are not "cleaned up" : the previous class is not reset correctly. It is probably something I've done wrong or badly, but this is only going to get heavier; I think I should use another class of Backbone views here, but I'm afraid the number of slots and thereof of views objects will be high and cause performance issue. I don't know mush about js perf so I'd like to have some feedback before jumping on that train. Any other advice on how to do this would be quite welcomed too. Thanks for your time. If this is not clear enough, tell me, I'll try and rephrase it.

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  • regex in textfield

    - by klox
    dear all..i have this code: <script> var str="KD-R435MUN2D"; var matches=str.match(/(EE|[EJU]).*(D)/i); if (matches) { var firstletter = matches [1]; var secondletter = matches [2]; var thirdletter = matches [3]; alert(firstletter + secondletter + thirdletter); }else{ alert (":("); } </script> i want it can control a textfield <input type="text" id="mod">..how must i do?

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  • Unique element ID to reference later

    - by Hanpan
    I'm trying to figure out a method of storing a unique reference to each tag on a particular page. I won't have any ability to edit the page content and I'll the generated UID to stay the same on every page refresh. Since browsers don't generate any kind of UID for elements, I was thinking that the only method to do this would be to execute a script which walks the DOM and creates a UID for each it comes across. I don't know how accurate this will be, especially considering I'll need to ensure it creates the same UID for the tag each time the script crawls the page. Can anyone think of any other, more accurate ways of mapping a page? Many thanks.

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  • jQuery Validation plugin, IE7 "SCRIPT3: Member not found"

    - by jkinz
    I have the following: <html> <head> </head> <body> <div> <form method="post"> <div id="questions"> <label for="question-6">Name of Course:</label> <input type="text" name="name_of_course[response]" value="" id="question-6" class="required"> <label class="control-label" for="reporting-year">Reporting Year: </label> <select name="reporting_year" id="reporting-year"> <option value="-1" selected="selected">Select option...</option> <option value="4">2013-2014</option> <option value="1">2012-2013</option> <option value="2">2011-2012</option> <option value="3">2010-2011</option> </select> </div> <input type="submit" name="submit" value="Save Entry" class="btn"> </form> </div> <script src="//code.jquery.com/jquery.js"></script> <script src="//ajax.aspnetcdn.com/ajax/jquery.validate/1.10.0/jquery.validate.min.js"></script> <script> $(function(){ jQuery.validator.addMethod("notEqual", function(value, element, param) { return this.optional(element) || value !== param; }, "Please select an option"); $('form').validate({ rules:{ 'reporting_year': { notEqual: "-1" } } }); }); </script> </body> </html> Everyone's favorite browser, IE7 (IE10 w/compatibility really) is reporting the following error in the console: SCRIPT3: Member not found. jquery.js, line 2525 character 4 Of course IE8 and above work fine, but my client is using IE7.

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  • Is there a way to create a step chart using the Google Charts API?

    - by Nathan
    I'd like to use the google charts API to create a step chart for my Rails application. Preferably using the annotated timeline Google has (since it has a nice wrapper plugin for rails): http://code.google.com/apis/visualization/documentation/gallery/annotatedtimeline.html However, there doesn't seem to be a way to create a step chart using the annotated timeline or any other chart in the Google API. I'm looking to make a plot like this: If there is no way to do this with the google API, is there an alternative graphing library that can handle such a task?

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  • backbone.js removing template from DOM upon success

    - by timpone
    I'm writing a simple message board app to learn backbone. It's going ok (a lot of the use of this isn't making sense) but am a little stuck in terms of how I would remove a form / html from the dom. I have included most of the code but you can see about 4 lines up from the bottom, the part that isn't working. How would I remove this from the DOM? thx in advance var MbForm=Backbone.View.extend({ events: { 'click button.add-new-post': 'savePost' }, el: $('#detail'), template:_.template($('#post-add-edit-tmpl').html()), render: function(){ var compiled_template = this.template(); this.$el.html(compiled_template); return this; }, savePost: function(e){ //var self=this; //console.log("I want you to say Hello!"); data={ header: $('#post_header').val(), detail: $('#post_detail').val(), forum_id: $('#forum_id').val(), post_id: $('#post_id').val(), parent_id: $('#parent_id').val() }; this.model.save(data, { success: function(){ alert('this saved'); //$(this.el).html('this is what i want'); this.$el.remove();// <- this is the part that isn't working /* none of these worked - error Uncaught TypeError: Cannot call method 'unbind' of undefined this.$el.unbind(); this.$el.empty(); this.el.unbind(); this.el.empty(); */ //this.unbind(); //self.append('this is appended'); } });

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  • Passing variables to callback functions

    - by mickyjtwin
    I am trying to write a jQuery plugin, that can be applied to a selector. Within this plugin, there are multiple calls to webservices, where callback methods are required. The problem I am having is maintaining the current context item in the each loop of the selector. (function($){ $.fn.myMethod = function(){ return this.each(function(){ var c = $(this); $.api.methodToCall("", CallbackFunction); }); }; function CallbackFunction(data, result){ // do stuff based on c } })(jQuery); Normally, you would provide the callback function straight away, which allows me to access c, however within the callback function, there potentially is another api call, so it would start to get messy. Is there any way to do this?

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  • Difficulty with MooTools Class.extend

    - by Erin Drummond
    Consider the following code: var Widget = new Class({ Implements: [Options], options: { "name" : "BaseWidget" }, initialize: function(options) { alert("Options are: " + JSON.stringify(options)); //alerts "Options are: undefined" this.setOptions(options); alert("My options are: " + JSON.stringify(this.options)); //alerts "My options are: { 'name' : 'BaseWidget' }" }, getName: function() { return this.options.name; } }); var LayoutWidget = Widget.extend({ initialize: function() { this.parent({ "name" : "Layout" }); } }); alert(new LayoutWidget().getName()); //alerts "BaseWidget" I am having difficulty in determining why the argument passed in the "this.parent()" call in "initialize" function of LayoutWidget is coming through as "undefined" in the initialize function of Widget. I am using MooTools 1.2.2. Would somebody be able to point me in the right direction?

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  • How to make Web Storage persistent in Cordova using JS?

    - by ett
    I have a small quiz app, which is a cross-platform mobile app, that I plan for it to run on Android, iOS, and WP8. I want to store a local highscore, where it will keep track how many points the user had, and if he/she does better than the already stored highscore, update the current highscore. Though, I want the highscore to be persistent, what I mean is, every time the user opens the app I want the last highscore to be present and it to be compared with the new quiz score. Meaning, I don't want the highscore to be deleted after each time the app is closed. I also want for the first time when the app is ran, the highscore to be set to 0, so obviously the first time the user finishes the quiz gets a new highscore. I have those codes so far: scoredb.js // Wait for device API libraries to load document.addEventListener("deviceready", initScoreDB, false); // Device APIs are available function initScoreDB() { window.localStorage.setItem("score", 0); highscore = window.localStorage.getItem("score"); } main.js var correct = 0; var highscore; // In between I have some code that keeps incrementing // correct variable for each correct answer. if (correct > highscore) { window.localStorage.setItem("score", correct); highscore = correct; } It does seem to work okay once the app is started. I did the quiz three times, in the simulator, and it keeps the score as it should. Though, each time I open the app, highscore is reseted to 0. I guess it is due to the fact that I call initScoreDB when the device is ready, and I initialize the score to 0 there and give that value to highscore. Can someone help me to initialize the score to 0 only when the app is ran for the first time, and all the other times to keep the latest highscore as the current highscore and compare it each time with the score that is achieved when the quiz is finished. If someone can help me, I would be glad.

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  • Parsing the json and storing it in an array?

    - by Prateek Raj
    hi everyone, i'm very new to this web related problems, please help i'm working on sencha which proves to be very difficult wen it comes to json parsing . . . . so i'm planning on retrieving the data to the html page and then load it into my js file. . . so here is the problem: i've already asked about it and got a reply.. http://jsbin.com/uwuca5 but now wen i use the html source code locally in my system or even by using the IIS i couldn't parse the data. . . . . . . here is the link for my json file: http://compliantbox.com/optionsedge/sample.php i'm trying to use this link in my code and retrive the data but the data is returning null Please Help Thank you,

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  • HTMLInputElement in IE7

    - by Vladislav Qulin
    I'm writing an extension for crossbrowser input&textarea selection getter and setter. So that's the way i write my code: HTMLInputElement.prototype.getSelectionRange = get_selection_range; HTMLInputElement.prototype.setSelection = set_selection_range; HTMLTextAreaElement.prototype.getSelectionRange = get_selection_range; HTMLTextAreaElement.prototype.setSelection = set_selection_range; get_selection_range and set_selection_range are those extended functions. So i just wanted to replace someInputElement.selectionStart = a; // and whole lot of code due to browser someInputElement.selectionEnd = b; // compatibility with just someInputElement.setSelection(a, b); someInputElement.setSelection({ start: a, end: b }); someOtherElement.setSelection(someInputElement.getSelection()); But then i met couple of difficulties in IE7. First of all, IE7 doesnt know what is HTMLInputElement. I don't want to extend whole Object. Well, that would be the last thing i'll do, but i want to evade it. Functions get_selection_range and set_selection_range are alright, don't ask what's within, you've seen it couple of times already. So the question is: is there any legit substitution for HTMLInputElement in JS for IE7?

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