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  • How to add attributes to a HTML element in a valid way?

    - by Click Upvote
    I want to be able to add an attribute to a HTML element to be able to identify what its referring to. E.g if I have a list of names and a checkbox next to each name, like this: <div id="users"> Bob smith <input type=checkbox /> </div> And when a checkbox is clicked and the event handler function for it is called, I want to be able to identify which user was selected/unselected. Ideally I'm looking for something like this: <input type=checkbox data-userId = "xxx" /> Then when its clicked: function handleClick() { var userId = $(this).attr('data-userId'); } However I'm looking to do this in a way that won't break my HTML validation, and would still be valid HTML and work in all browsers. Any suggestions?

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  • Add 64 bit offset to a pointer

    - by Novox
    In F#, there's the NativePtr module, but it seems to only support 32 bit offsets for its’ add/get/set functions, just like System.IntPtr does. Is there a way to add a 64 bit offset to a native pointer (nativeptr<'a) in F#? Of course I could convert all addresses to 64 bit integers, do normal integer operations and then convert the result again to nativeptr<'a, but this would cost additional add and imul instructions. I really want the AGUs to perform the address calculations. For instance, using unsafe in C# you could do something like void* ptr = Marshal.AllocHGlobal(...).ToPointer(); int64 offset = ...; T* newAddr = (T*)ptr + offset; // T has to be an unmanaged type Well actually you can't, because there is no "unmanaged" constraint for type parameters, but at least you can do general pointer arithmetic in a non-generic way. In F# we finally got the unmanaged constraint; but how do I do the pointer arithmetic?

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  • Output of Iterable.sliding as Tuple

    - by ziggystar
    The method sliding on collections returns a sliding window of given size in the form of X[Iterable[A]] with X being the type of the collection and A the element type. Often I need two or three elements and I prefer to have them named. One ugly workaround for sliding(2) is the following: points.sliding(2).foreach{ twoPoints => val (p1,p2) = (twoPoints.head,twoPoints.last) //do something } This sucks and only works for two elements. Also note that (a,b) = (twoPoints(0),twoPoints(1)) doesn't work. Help me!

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  • Get ffmpeg information in friendly way

    - by JBernardo
    Every time I try to get some information about my video files with ffmpeg, it pukes a lot of useless information mixed with good things. I'm using ffmpeg -i name_of_the_video.mpg. There are any possibilities to get that in a friendly way? I mean JSON would be great (and even ugly XML is fine). By now, I made my application parse the data with regex but there are lots of nasty corners that appear on some specific video files. I fixed all that I encountered, but there may be more. I wanted something like: { "Stream 0": { "type": "Video", "codec": "h264", "resolution": "720x480" }, "Stream 1": { "type": "Audio", "bitrate": "128 kbps", "channels": 2 } }

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  • Algorithm of JavaScript "sort()" Function

    - by Knowledge Craving
    Recently when I was working with JavaScript "sort()" function, I found in one of the tutorials that this function does not sort the numbers properly. Instead to sort numbers, a function must be added that compares numbers, like the following code:- <script type="text/javascript"> function sortNumber(a,b) { return a - b; } var n = ["10", "5", "40", "25", "100", "1"]; document.write(n.sort(sortNumber)); </script> The output then comes as:- 1,5,10,25,40,100 Now what I didn't understand is that why is this occurring & can anybody please tell in details as to what type of algorithm is being used in this "sort()" function? This is because for any other language, I didn't find this problem where the function didn't sort the numbers correctly. Any help is greatly appreciated.

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  • What is wrong with the below statement(C#3.0 / Lambda)

    - by Newbie
    what is wrong in the below Enumerable.Range(0, objEntityCode.Count - 1).Select(i => { options.Attributes[i] = new EntityCodeKey { EntityCode = objEntityCode[i].EntityCodes , OrganizationCode = Constants.ORGANIZATION_CODE }; }) .ToArray(); Throwing error The type arguments for method 'System.Linq.Enumerable.Select(System.Collections.Generic.IEnumerable, System.Func)' cannot be inferred from the usage. Try specifying the type arguments explicitly. But this works Enumerable.Range(0, objEntityCode.Count - 1).ToList().ForEach(i => { options.Attributes[i] = new EntityCodeKey { EntityCode = objEntityCode[i].EntityCodes , OrganizationCode = Constants.ORGANIZATION_CODE }; } ); Using C#3.0. Purpose: I am learning LINQ / LAMBDA and trying to do the same program in different way. Thanks.

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  • Why do only the controls show up when using HTML5 video on Chrome?

    - by Rob
    I'm using the following HTML5 to display video, but only the controls show up in Chrome. Works fine in Safari and Firefox: <video width="720" height="480" controls="controls" preload="preload"> <source src="<?php bloginfo('url'); ?>/wp-content/uploads/Reel.ogv" type="video/ogg; codecs=theora,vorbis" > <source src="<?php bloginfo('url'); ?>/wp-content/uploads/Reel.mp4" type="video/mp4"> Your browser doesn't support video. </video> Any ideas?

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  • cant get ajax response (JSON) to call 'success' function?

    - by Haroldo
    for some reason the success function isnt being called? javscript: $.ajax({ type: 'POST', url: 'http://localhost/hf_latest_desktop/st_pages/user_area/acc_buttons/pass_change/pass_change_ajax.php', data: data, dataType: 'json', success: function(e){ console.log(e); if(e.status == 'success'){ alert('your password has been changed!'); } if(e.status == 'error1'){ alert('please fill in all inputs!'); } if(e.status == 'error2'){ alert('password incorrect!'); } if(e.status == 'error3'){ alert('change failed!'); } } }); php file ajax is calling to: <?php session_start(); session_cache_limiter('nocache'); header('Expires: ' . gmdate('r', 0)); header('Content-type: application/json'); $status = 'error1'; //for sake of example ?> {'status':'<?php echo $status; ?>'}

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  • Variable pre-fixes, Visual Studio 2010 onwards?

    - by thedixon
    I'm a bit bewildered on this subject, as I relate variable prefixes to being a thing of the past now, but with Visual Studio 2010 onwards (I'm currently using 2012), do people still do this and why? I only ask because, these days, you can hover over any variable and it'll tell you the variable type and scope. There's literally no requirement for pre-fixing being there for readability. By this I mean: string strHello int intHello etc. And I'm being language/tool biased here - as Visual Studio takes a lot of the legwork out for you in terms of seeing exactly what type the variable is, including after conversions in the code. This is not a "general programming" question.

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  • Parent element selection problem?

    - by Starx
    My HTML is something like this <div id="mydiv" class="common"> <input type="text" id="text1" value="" /> <input type="text" id="text2" value="" /> </div> I am assigning a function on the onclick event of the textbox like this $(document).ready(function() { $(".common input").click(function() { //////// What I am trying to do is access the id of its parent // in this case it is "mydiv" alert($(this:parent).attr('id')); }); But it is not working

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  • connection textfield and html table with database

    - by klox
    dear all..i have a textfield <tr> <td> <td><input type="text" id="mod"></td> </td> </tr> and a cell <tr> <td><div id="value">//i want data show here</div> </td> </tr> beside that, i've a table "settingdata" in database it consist of 2 field:itemdata and remark.. itemdata's value are "UD" and remark's value are "FM=87.5-108.0MHZ"... what must i do if i want after type "0103UD" at textfield inside <div id="value"></div> can show "FM=87.5-108.0mhz"...

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  • class T in c++ (your definition)

    - by JohnWong
    The one advantage of using class T in c++ is to reduce the time to redefine data types in a function, if those data types are defined in other function, for example, in int main. template <class T> void showabs(T number) { if (number < 0 ) number = -number; cout << number << endl; return 0; } int main() { int num1 = -4; float num2 = -4.23f; showabs(num1); showabs(num2); return 0; } So in this case, without class T, for each data type, we have to add its corresponding data-type condition, that is, another set of if statement for int, and another one for float. Am I correct?

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  • jQuery does not execute on dynamically loaded content,, even on a click events.

    - by sxv
    I have two document.ready functions. The first loads content into div#header. The second one performs a hide function and then a toggle function on the newly loaded content. I am not sure if this is a queueing issue or something, but not even the alert() below is executed when I click the loaded content. Thanks. <script type="text/javascript"> $(document).ready(function() { $("#header").load("/documents/collegeradioheader.txt"); }); </script> <script type="text/javascript"> $(document).ready(function() { $(".hideme").hide(); $(".slick-toggle").click(function() { alert('hi'); $(this).parent().next('div').slideToggle('fast'); .siblings('div:visible').slideUp('fast'); }); }); </script>

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  • Creating Javascript function called ReadName()

    - by user228390
    Hey guys, I want to create a form which has a text entry box where a user can enter their name and then I want a button as well. But what I want this button to have a function called ReadName() where what will happen is when the user clicks on the button it will come up with a message saying "Hello user name will appear here I have tried my self and but I don't think I am not getting what I want. Any help will be appreciated. <form> <label for="name">Name:/label> <input type="text" name="name" id="name"/> <input type="text" name="name" onfocus="ReadName()"/> </form>

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  • What are the differences in performance between synchronous and asynchronous JavaScript script loading?

    - by jasdeepkhalsa
    My question is simply: what are the differences in performance between synchronous and asynchronous JavaScript script loading? From what I've gathered synchronous code blocks the loading of a page and/or rest of the code from executing. This happens at two levels. First, at the level of the script actually loading, and secondly, within the JavaScript code itself. For example, on the page: Synchronous: <script src="demo_async.js" type="text/javascript"></script> Asynchronous: <script async src="demo_async.js" type="text/javascript"></script> And within a script: Synchronous: function a() {alert("a"); function b() {alert("b");}} Asynchronous (and self-executing): (function(a, function(b){ alert(b); }) { alert(a); }))(); So what really is the difference in performance from using these different loading methods and JavaScript patterns?

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  • Configuring jdbc-pool (tomcat 7)

    - by john
    i'm having some problems with tomcat 7 for configuring jdbc-pool : i`ve tried to follow this example: http://www.tomcatexpert.com/blog/2010/04/01/configuring-jdbc-pool-high-concurrency so i have: conf/server.xml <GlobalNamingResources> <Resource type="javax.sql.DataSource" name="jdbc/DB" factory="org.apache.tomcat.jdbc.pool.DataSourceFactory" driverClassName="com.mysql.jdbc.Driver" url="jdbc:mysql://localhost:3306/mydb" username="user" password="password" /> </GlobalNamingResources> conf/context.xml <Context> <ResourceLink type="javax.sql.DataSource" name="jdbc/LocalDB" global="jdbc/DB" /> <Context> and when i try to do this: Context initContext = new InitialContext(); Context envContext = (Context)initContext.lookup("java:/comp/env"); DataSource datasource = (DataSource)envContext.lookup("jdbc/LocalDB"); Connection con = datasource.getConnection(); i keep getting this error: javax.naming.NameNotFoundException: Name jdbc is not bound in this Context at org.apache.naming.NamingContext.lookup(NamingContext.java:803) at org.apache.naming.NamingContext.lookup(NamingContext.java:159) pls help tnx

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  • passing array fields to jquery ajax

    - by Rob Brandt
    I have a form I am submitting via jquery ajax. Early in the form, I have this field: <select name="inquirymodule[]" id="inquirymodule"> The user can add as many as they like, and all the selects go into the inquirymodule[] array. The jQuery looks like this: jQuery.ajax({ type: 'POST', url: 'ajax.php', dataType: 'json', data: { inquirymodule: jQuery("select[name='inquirymodule[]']").serialize(), }, error: function(XMLHttpRequest, textStatus, errorThrown) { alert('error'); } }); That works fine. Trying to do the same thing with a date, like this: <input class="formInput" type="text" id="startBreak0" name='startbreak[]' /> adding startbreak: jQuery("select[name='startbreak[]']").serialize() to the ajax call. It doesn't work, I cannot see why. Suggestions?

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  • DropDownList and ViewData

    - by Petko Xyz
    In my controller I have: Category x = new Category(1, "prva", 0); Category y = new Category(2, "vtora", 1); Category z = new Category(3, "treta", 1); List<Category> categories = new List<Category>(); categories.Add(x); categories.Add(y); categories.Add(z); ViewData["categories"] = categories; And in my view I have: <%= Html.DropDownList("categories")%> But I have an error: The ViewData item that has the key 'categories' is of type 'System.Collections.Generic.List`1[[Category, MvcApplication1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]' but must be of type 'IEnumerable'. Uggggghhh how to resolve this?

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  • C# Why does calling an interface member from a class generate an error?

    - by Jack
    So I have an interface: interface IFoo { int Bar(); int this[int i] {get; set;} } And a class that derives from it class Foo : IFoo { public int IFoo.Bar() { //Implementation { public int IFoo.this[int i] { //Implementation } } Now, I try to do this: var fooey = new Foo(); int i = Fooey.Bar(); or this: int i = Fooey[4]; I would expect these to work properly. However, the compiler generates an error as if such members don't exist. Why is that? I am aware I can cast Foo as IFoo, but I am also aware that casting is costly to performance, which is often the reason to use interfaces in the first place. EDIT 1: These are the errors generated 'Foo' does not contain a definition for 'Bar' and no extension method 'Bar' accepting a first argument of type 'Foo' could be found (are you missing a using directive or an assembly reference?) "Cannot apply indexing to an expression of type 'Foo'"

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  • click event being fired twice - jquery

    - by maxp
    I have the following simplified html: <div class="foo" style="width:200px; height:200px;"> <input type="checkbox" /> </div> <script type="text/javascript"> $('.foo').click(function(){$(this).find('input:checkbox')[0].click();}); </script> Clicking the 200x200 div 'foo' works well, and raises the click event for the checkbox inside it. However when I exactly click the checkbox itself, it fires its 'normal' event, plus the jquery bound event above, meaning the checkbox checks itself, then unchecks itself again. Is there a tidy way to prevent this from happening?

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  • escaping into php

    - by pradeep
    $valid-url = "p1=".rawurlencode($_GET['p1'])."&type=".rawurlencode($_GET['type'])."&os=".rawurlencode($_GET['os'])."&price=".rawurlencode($_GET['price'])."&sort=".rawurlencode($_GET['sort'])."&sort_order=".rawurlencode($_GET['sort_order'])."&perpage=".rawurlencode($perpage).""; i am trying to build the url and pass it to <a href=''..but its throwing escaping problem...can i get some help on this.

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