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• Eliminating cyclic flows from a graph

  - by Jon Harrop

  I have a directed graph with flow volumes along edges and I would like to simplify it by removing all cyclic flows. This can be done by finding the minimum of the flow volumes along each edge in any given cycle and reducing the flows of every edge in the cycle by that minimum volume, deleting edges with zero flow. When all cyclic flows have been removed the graph will be acyclic. For example, if I have a graph with vertices A, B and C with flows of 1 from A?B, 2 from B?C and 3 from C?A then I can rewrite this with no flow from A?B, 1 from B?C and 2 from C?A. The number of edges in the graph has reduced from 3 to 2 and the resulting graph is acyclic. Which algorithm(s), if any, solve this problem?

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• How do you override an existing html form to use jquery to post the form?

  - by Chris

  I have a simple form that I am currently posting back to the server to update a nickname. What jquery code do I add (without changing the form) so that the page will not refresh, but instead jquery will post the form in the background and then pop up an alert message containing the reply back from the server? <form method="post" action="http://www.myserver.com/update_nickname" name="input"> Quick form to test update_nickname:<br> New nickname:<input type="text" value="BigJoe" name="newNickname"><br> <input type="submit" value="Submit"> </form> <script src="jquery-1.4.2.min.js" type="text/javascript"> </script>

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• better understanding of JSF Life cycle

  - by gurupriyan.e

  I need your help to understand this better. This is my case. I have a custom validator for each of my input controls in the form. So when there is any validation error,I add a corresponding FacesMessage in the validate method. My understanding was that when there is any validation error - or when there are any FacesMessages added in the validate method of the Custom Validator, it would skip the INVOKE APPLICATION phase and would directly call the RENDER RESPONSE PHASE - showing the FacesMessage that was added in the PROCESS VALIDATION Phase - Is this correct? The problem I'm facing is - I add a FacesMessage in the PROCESS VALIDATION Phase - because of a validation error - and I add a confirmation message for the action that was taken by the user in the INVOKE APPLICATION PHASE - Now both are shown in the page in the RENDER RESPONSE Phase ? - If my understanding is correct in the above question - is it the best practice to conditionally add a confirmation FacesMessage after confirming that there are no FacesMessages in the currect FacesContext ? Appreciate your help.

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• My image does not load on a jQuery fade in effect even though the div loads.

  - by Konstantin

  jQuery(document).ready(function() { if (useMSIE){ pngfixALL(); }; jQuery(div).show(data_fadeInEffect, 500);return false; // jQuery(div).animate({opacity:1}, 500, 'linear'); }); This is what I have for a fade in effect. When using animate(), the image in the div tag fades in fine. However, when I use show(), the div loads because I can click in that area, but the image itself doesn't load. Why is this happening? I have another area of the code where I click on an 'x' in the image and it fades out using hide(). This works fine.

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• How can you implement a jQuery feature without having IE prompt users with an Active X warning?

  - by Bijan

  Essentially, I want to implement a jQuery feature on a site that I'm building, but I don't want Internet Explorer users to have to click "Allow Blocked Content". The feature works fine with Safari, Chrome, and Firefox. It's only IE that prompts the users with the Active X warning. I'm using the following jQuery cycle plugin: http://malsup.com/jquery/cycle/ I thought that I might simply have to live with the fact that users have to click on the Active X message when they use the site, but Zendesk (www.zendesk.com) is using the same implementation and that site doesn't prompt me with the warning. Any ideas as to what I'm doing wrong would be appreciated.

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• How to call a jquery function from an action method in controller?

  - by Hasan Fahim

  I have a requirement to open a popup from an action method in controller. The action method is basically registering a user. [HttpPost] public ActionResult Register(RegisterModel model) { if (ModelState.IsValid) { MembershipCreateStatus createStatus; Membership.CreateUser(model.UserName, model.Password, model.Email, null, null, true, null, out createStatus); if (createStatus == MembershipCreateStatus.Success) { FormsAuthentication.SetAuthCookie(model.UserName, false /* createPersistentCookie */); //------------------------------------------ //I need to call a jquery function from here //------------------------------------------ return RedirectToAction("Index", "Home"); } else { ModelState.AddModelError("", ErrorCodeToString(createStatus)); } } return View(model); } The jquery function, present in the view, would just make a hidden DIV, visible, and set the opacity, etc, to represent a popup. I need to call such a jquery function from the controller's action method shown above.

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• Jquery: fade menu out when clicking on anything EXCEPT the menu itself, short piece of code.

  - by ExodusNicholas

  .saf_search is a button, when it's clicked, the menu .lisearch fades in, when you click anywhere on the page EXCEPT for on the menu .lisearch, then it should fade out(that's how it's SUPPOSED to work) Does anyone know why this isn't working? It fades in, and the first time i click anywhere on the page it fades out, but the second time i try to fade in the menu, it will quickly fade out again without me clicking the document. i think this has to do with .one, but i had it working before my hard drive crashed, and now i can't figure out how to get it working again... $('.saf_search').click(function() { $('.lisearch').fadeIn(200); }); $(document).click(function(){ jQuery(".lisearch").click(function(){ return false; }); jQuery(document).one("click", function() { jQuery(".lisearch").fadeOut(); }); });

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• What is the status of jQuery's multi-argument content syntax: deprecated, supported, documented?

  - by Evan Carroll

  I've never seen this in any jQuery docs I've read; nor, have I ever seen it in the wild. I just observed multi-content syntax working here with jQuery 1.4.2. Is this supported syntax? Is it deprecated? $(".section.warranty .warranty_checks :last").after( $('<div class="little check" />').click( function () { alert('hi') } ) , $('<span>OEM</span>') /*Notice this (a second) argument */ ); I've never seen any indication in the jQuery grammar that any of the functions accept more than one argument (content) in such a fashion.

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• Any chances to imitate times() Ruby method in C#?

  - by Alexander Prokofyev

  Every time I need to do something N times inside an algorithm using C# I write this code for (int i = 0; i < N; i++) { ... } Studying Ruby I have learned about method times() which can be used with the same semantics like this N.times do ... end Code fragment in C# looks more complex and we should declare useless variable i. I tried to write extension method which returns IEnumerable, but I am not satisfied with the result because again I have to declare a cycle variable i. public static class IntExtender { public static IEnumerable Times(this int times) { for (int i = 0; i < times; i++) yield return true; } } ... foreach (var i in 5.Times()) { ... } Is it possible using some new C# 3.0 language features to make N times cycle more elegant?

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• Development life-cycle for making an application?

  - by Mohit Deshpande

  I have an idea that I want to make into an application (I have a C/C++, C#, and Java programming background so I will be developing in QT Creator for cross-compilation's sake). So now I am asking you senior developers, what should I do next? I know that all good programs come from an idea. Then what should I do? Prototype the UI? Then develop the code? Is there like a circle of the development of an application? I DO NOT MEAN FOR THIS QUESTION TO BE SUBJECTIVE OR ARGUMENTATIVE

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• How might you unobtrusively enhance the jQuery Datepicker class?

  - by Teflon Ted

  You can pass special strings into jQuery's Datepicker class setDate() method like "+7" which will be translated into "7 days from today": http://docs.jquery.com/UI/Datepicker#method-setDate But you can't get that "+7" back out. When you call getDate() you get the calculated resulting date. I have a use case where I need to pull out the special string "+7" for propagation. One chunk of code is passing a special string into the Datepicker and passing the Datepicker over to another chunk of code which pulls out the date, but the latter sometimes needs to know the special string rather than the calculated date. So I need to enhance the Datepicker tool to (a) store the special code internally and (b) expose it via a method like getOriginallyPassedInDate() or some such. I'm not a jQuery/Javascript ninja so I could really use some guidance on how I might preferably-unobtrusively add the necessary functionality to the Datepicker class, the way you might monkey-patch an object in Ruby I'm guessing.

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• jQuery toggle show XHTML Smarty some clahes maybe? It doesn't show..

  - by Kyle Sevenoaks

  Hi, at this page new customer, there is something that it doesn't like, my boss asked me to make a show function that shows the new customer registration when the user clicks on the "ny kunde" button. Here is an example of the code I got working (I'm a jQuery noob). I guess there is some clash between this and the functions already installed on the page, but what? #roundbigboxnykunde is meant to be hidden on the page as on the jsfiddle example, but I have shown it to let you see what else is on the page. Code on my .tpl <button id="button1">&nbsp;</button> {literal} <script src="http://code.jquery.com/jquery-latest.js"></script> <script type="text/javascript"> $(function() { //checkbox $("#button1").click(function()1 $(".newCustomer").toggle("show"); }); });? </script> {/literal} <div class="newCustomer">... Thanks.

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• Deciding Development life cycle.

  - by vinay_rockin

  How to decide software development process for developing a software, what are the key factors to be considered while deciding which development process to follow(e.g Agile,WaterFall,Spiral...).

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• What's the recommended way to create an HTML elemnt and bind a listener to it using jQuery?

  - by Bytecode Ninja

  At the moment I achieve this using something like this: var myElem = "<tr id='tr-1'><td>content</td></tr>"; $("#myTable").append(myElem); $("#tr-1").click(function() { // blah blah }); Traditionally, when I wasn't using jQuery, I used to do something like this: var myElem = document.createElement(...); var myTable = document.getElementById("myTable"); myTable.appendChild(myElem); myElem.onclick = function() { // blah blah } The thing is, in the second approach I already have a reference to myElem and I don't have to scan the DOM ($("#tr-1")) to find it, like the jQuery approach, and hence it should be much faster especially in big pages. Isn't there a better jQuery-ish way to accomplish this task?

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• best way to store php data on a page for use with javascript/jquery?

  - by Haroldo

  Ok, so im trying to work out the fastest way of storing data on my page without slowing the page load: I need to store information in the page to be later used by jquery. My page is an events page and i want to attach data to each event anchor. there are 100+ events to attach data to. The events anchors are created with a php loop, so i could create the data elements within this loop using either use un-semantic tags ie *rel="some_data"* create a jquery.data() for each iteration of the loop or i could run the loop again, separately, this time inside script tags with jquery.data(); would really appreciate any thoughts on this!

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• How do I pass in config info to CKEditor using the jQuery adapter?

  - by alex

  I'm using the latest CKeditor with jQuery adapter. I have successfully got it to work, and display. However, as I am completely new to CKeditor, how do I pass in config variables using the jQuery method? This is what I've got $( '#input-content' ).ckeditor('', { toolbar: 'basic' }); I think from what I've read, the first argument is meant to be a callback, and the 2nd the config. But doing this has not changed the editor at all. How do I use these config properties etc using the jQuery adapter? Thanks

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• What's the most efficient way to manage large datasets with Javascript/jQuery in IE?

  - by RenderIn

  I have a search that returns JSON, which I then transform into a HTML table in Javascript. It repeatedly calls the jQuery.append() method, once for each row. I have a modern machine, and the Firefox response time is acceptable. But in IE 8 it is unbearably slow. I decided to move the transformation from data to HTML into the server-side PHP, changing the return type from JSON to HTML. Now, rather than calling the jQuery.append() time repeatedly, I call the jQuery.html() method once with the entire table. I noticed Firefox got faster, but IE got slower. These results are anecdotal and I have not done any benchmarking, but the IE performance is very disappointing. Is there something I can do to speed up the manipulation of large amounts of data in IE or is it simply a bad idea to process very much data at once with AJAX/Javascript?

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• Am i using too much jquery? When i'm crossing the line?

  - by Andrea

  Lately i find myself using jquery and javascript a lot, often to do the same things that i did before using css. For example, i alternate table rows color or create buttons and links hover effects using javascript/jquery. Is this acceptable? Or should i keep using css for these kind of things? So the real question is: When i'm using too much jquery? How can i understand when i'm crossing the line? Thanks.

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• jQuery - Why doesn't combining has() and gt() work in some cases?

  - by KatieK

  I wanted to select any ul which contains more than 3 lis. This code worked with the 1.2.6 jQuery library: $("ul:has(li:gt(2))") .each( function() { $(this).css("border", "solid red 1px"); }); But not 1.3.2 or 1.4.2. This code worked with the 1.4.2 jQuery library: $('ul').has('li:nth-child(3)').css('border', 'solid red 1px'); But not v1.2.6. Why does each version work with one library version, but not the other? Am I encountering some kind of bug, or am I doing something wrong? Any help understanding , or differences to be aware of between different versions of the jQuery libraries, would be much appreciated. Thanks!

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• How do I "think in AngularJS" if I have a jQuery background?

  - by Mark Rajcok

  How do I “think in AngularJS” if I have a jQuery background? Suppose I'm familiar with developing client-side applications in jQuery, but now I'd like to start using AngularJS. Can you describe the paradigm shift that is necessary? Here are a few questions that might help you frame an answer: How do I architect and design client-side web applications differently? What is the biggest difference? What should I stop doing/using; what should I start doing/using instead? Are there any server-side considerations/restrictions? I'm not looking for a detailed comparison between jQuery and AngularJS.

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• Input type button/submit that does both form validation and submit via jquery ajax?

  - by Pandiya Chendur

  I am trying to use jquery validator plugin and form submit via ajax in jquery..... Validator plugin works with <input type="submit" value="Add a client" id="clientadd"/> but my form submit works with <input type="button" value="Add a client" id="clientadd"/>..... <form id="addform" autocomplete="off"> //My controls here </form> I didn't specify action and method attributes here as i ll submit my form using jquery.ajax().... Any suggestion how to get both working together....

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• How to find the length of a linked list that is having cycles in it?

  - by Bragaadeesh

  This was one of the interview questions asked. How to find the length of a linked list that is having cycle in it. I know how to calculate whether a linked list has a cycle or not using Hare and Tortoise technique. I even know how to calculate the length by storing the addresses in a hashset. But what I was not able to tell is how to calculate the length of the linked list without using a external space of O(n). Please help me. Thanks.

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• Does jquery require timestamp on GET Calls in IE7?

  - by Mithun P

  Please see the jQuery code below, it used to paginate some search results paginate: function() { $("#wishlistPage .results").html("<div id='snakeSpinner'><img src='"+BASE_URL+"images/snake.gif' title='Loading' alt='...'/></div>"); var url = BASE_URL+"wishlist/wishlist_paginated/"; $.ajax({ type: "GET", url: url, data: { sort_by:$('#componentSortOrder input:hidden').val(), offset:My.WishList.offset, per_page: 10, timestamp: new Date().getTime() }, success: function(transport){ $("#wishlistPage .results").html(transport); } }); }, My issue is not with the pagination, issue is when i need to call this same function when something happed to other part of the page which remove some search results, it brings the old results in IE7, other browsers works fine. So added the timestamp: new Date().getTime() part. That fixed the IE issue. I want o know why this happens in jQuery? Do I need to include a timestamp parameter to URL to avoid caching in all jQuery Ajax calls?

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• jQuery 1.4.2 - is $("#foo").hide("normal") broken or am I crazy?

  - by karim79

  Hi all, Does anyone know why .hide("normal") does not seem to be working in jQuery 1.4.2? Is it a bug, has it been removed or am I just crazy? I've managed to duplicate this using several different scenarios. Just try this: <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script> <script type="text/javascript"> $("button").click(function() { $("div.text").hide("normal"); }); </script> <div class="test">Hello this is a test</div> <button>Click</button>

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• How to set the focus on the first <select> element of the page using JQuery?

  - by user605660

  Hi. I would like to set the focus on the first element of the page using JQuery when the page is loaded. I could successfully set the focus for first element by using $(":input:visible:first").focus(); or $(':input:enabled:visible:first').focus(); , according to jquery, set focus on the first enabled input or select or textarea on the page . I tried to use something like $('select:first').focus(); or $("select").first().focus(); or $(':visible:first').focus(); or $('enabled:visible:first').focus(); or other variations I could think of, but have not succeeded. Could anyone help me on this problem? I am a beginner for JQuery. I would like this function to work for all major browsers. Thank you very much!

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