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• IIS site always returns 404 to WinMo emulator

  - by Derick Bailey

  I'm running Win7x64 Ultimate with Visual Studio 2008. I have a website built in ASP.NET 3.5 and hosted via IIS on my box. I can run the website perfectly fine and I can hit all of the web services that I have built in the website, using a web browser. When I pull up my Windows Mobile 6 emulator and hit the site (using my IP address) it always returns a 404 error. I have the emulator cradled w/ Device Emulator Manager and I can interact with the emulated device normally. I am also able to get out to google.com and other websites w/ the emulated device. I have also verified that the emulator is hitting my box by stopping the IIS website and seeing that the WinMo emulator cannot get any response. Then when I start the site again, I get a 404 error. When I pull up my site on my local dev box via FireFox or IE using the IP address it works perfectly fine. The worst part is this worked perfectly fine a few weeks ago, when I used it last. I don't know that I've changed anything since then - I'm just trying to use the emulator to hit my site again. Help?! Update: my http requests comign from the WinMo emulator are not getting logged in the IIS log files, while my requests from FireFox on my local box are getting logged. Not sure if that helps in figuring out the problem... Update 2: I can use the ruby Webbrick server on my local box and hit that server from my emulator just fine. is in IIS not allowing me to hit the IIS site from the emu? UPdate 3: I cradled an actual WinMo device to my box with it's networking turned off and was able to hit the IIS site just fine. that makes me think it's something set up wrong in the emulator.

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• High memory usage for dummies

  - by zaf

  I've just restarted my firefox web browser again because it started stuttering and slowing down. This happens every other day due to (my understanding) of excessive memory usage. I've noticed it takes 40M when it starts and then, by the time I notice slow down, it goes to 1G and my machine has nothing more to offer unless I close other applications. I'm trying to understand the technical reasons behind why its such a difficult problem to sol ve. Mozilla have a page about high memory usage: http://support.mozilla.com/en-US/kb/High+memory+usage But I'm looking for a slightly more in depth and satisfying explanation. Not super technical but enough to give the issue more respect and please the crowd here. Some questions I'm already pondering (they could be silly so take it easy): When I close all tabs, why doesn't the memory usage go all the way down? Why is there no limits on extensions/themes/plugins memory usage? Why does the memory usage increase if it's left open for long periods of time? Why are memory leaks so difficult to find and fix? App and language agnostic answers also much appreciated.

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• Javascript click function not working

  - by Nabe

  I need to null the value in text box on click, currently I have written a code as such <div class="keyword_non"> <h1>Keywords : <a class="someClass question_off" title="Keywords "></a></h1> <h2><input type="text" name="kw1" value="one" /></h2> <h2><input type="text" name="kw2" value="two" /></h2> <h2><input type="text" name="kw3" value="three" /></h2> <h2><input type="text" name="kw4" value="four" /></h2> </div> <script type="text/javascript" src="/functions/javascript/custom/non_profit_edit.js"></script> <script type="text/javascript" src="/functions/javascript/jquery-1.7.1.min.js"></script> <script type="text/javascript" src="/functions/javascript/custom/jquery-ui-1.8.7.custom.min.js"></script> Inside non_profit_edit.js i have written as such $(document).ready(function(){ $(".kw1").click(function() { $(".kw1").val(" "); }); $(".kw2").click(function() { $(".kw2").val(" "); }); $(".kw3").click(function() { $(".kw3").val(" "); }); $(".kw4").click(function() { $(".kw4").val(" "); }); }); But write now its not working properly... Is this any browser issues or error in code..

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• Old fashioned html onclick return false doesnt in IE work when jquery script included

  - by user292662

  Ok, so im quite new to jquery but found this bizzar problem just now, If we ignore jquery for a second and consider this scenario, if i have two links like below both with an href and both with and onclick event. The first link will not follow the href because the onclick returns false, and the second link will because the onclick returns true. <a href="/page.html" onclick="return false;">Dont follow</a> <a href="/page.html" onclick="return false;">Follow</a> This works just hunky dory in every browser as it should, the thing is, as soon as i include the jQuery script on the page this stops working in all versions of IE which then always follows the href whether the onclick returns false or not. (it continues to work fine in other browsers) Now if i add an event using jquery and call .preventDefault() on the event object instead of doing it the old fashioned way this behaves correctly, and you may say, well just do that then? But i have a site with thousands of lines of code and i am adding jquery support, i dont want to run the risk that i might miss an already defined html onclick="" and break the website. I cant see why jQuery should prevent perfectly normal javascript concepts from working, so is this a jQuery bug or am I missing something?

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• Site doesn't show up. Instead a bunch of weird characters?

  - by Richard Knop

  ‹?????혱jÃ0†w=Å=AÜ ÂЃ)ÅKGÅ:¢En%¹©ß¾²Ý 7xèpußøãŸ~ÝöÇ®Ömót¨•îŸû®©îao‚½‘Í:ºR†æk@´huõÃ(]­;z:¼•Íö¾þ{¥•‚¾ímwi£_±Ä1)–ÄÇ?‡‘,‰%Ž#YKF²Ä²Ä8ŒèKF²$–88ŒdI,qpÉ’Xâà0’%±Ä1Àaþe–TïÆOŒ@ 2^ßÇh"ù¦`Î!뜄yœ"Dü˜0e°Ó:ËË>e„ñʈfp.à(U®<œv¿ì;xñhRY3˜‹¡?ÞdŒ;Uºõ×R°WkÑ^Z÷¥¯Wß.Ò¤·?? That's exactly what shows up instead of my website in the web browser. Though on localhost the website works great. It's a Zend Framework based website, on localhost the output looks something like this (shortened version): <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>Title</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <meta http-equiv="Content-Style-Type" content="text/css" /> <meta http-equiv="Content-Language" content="en-US" /> </head> <body> <!-- LOTS OF HTML HERE --> </body> </html> What could cause this problem? It used to work before, this bug has only appeared today (or maybe already yesterday, I'm not sure).

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• Weird splitter behaviour when moving it

  - by tomo

  My demo app displays two rectangles which should fill whole browser's screen. There is a vertical splitter between them. This looks like a basic scenario but I have no idea how to implement this in xaml. I cannot force this to fill whole screen and when moving splitter then whole screen grows. Can anybody help? <UserControl xmlns:controls="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls" x:Class="SilverlightApplication1.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480"> <Grid x:Name="LayoutRoot" VerticalAlignment="Stretch" HorizontalAlignment="Stretch"> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto"/> <ColumnDefinition Width="Auto"/> <ColumnDefinition Width="Auto"/> </Grid.ColumnDefinitions> <Border BorderBrush="Black" BorderThickness="1" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" MinWidth="50"> </Border> <controls:GridSplitter Grid.Column="1" VerticalAlignment="Stretch" Width="Auto" ></controls:GridSplitter> <Border BorderBrush="Blue" BorderThickness="1" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Grid.Column="2" MinWidth="50"></Border> </Grid> </UserControl>

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• IE7 contentEditable word wrapping

  - by Iker Jimenez

  I have the following code: <html> <style type="text/css"> DIV { display:inline; border: solid red 1px; } .editable { background:yellow; } </style> <div class="editable" contentEditable="true"> This is test text. This is test text.This is test text.This is test text.This is test text.Thihis is test text.This is test text.</div> <div class="editable" contentEditable="true"> short </div> <div class="editable" contentEditable="true"> This is test text.This is test text.This is test text.his is test text.Thihis is test text.Thihis is test text.Thihis is test text.Thi </div> And I need IE7 (IE6 not needed and FF3.x works fine) to wrap the text correctly, which it does if I remove the contentEditable="true" from the divs. Just try this code with and without contentEditable and you'll see what I mean. Make the browser window small enough so you see how the text wraps. Thanks.

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• Debugging a Google Web Toolkit application that has an error when deployed on Google App Engine

  - by gerdemb

  I have a Google Web Toolkit application that I am deploying to Google App Engine. In the deployed application, I am getting a JavaScript error Uncaught TypeError: Cannot read property 'f' of null. This sounds like the JavaScript equivalent of a Java NullPointerException. The problem is that the GWT JavaScript is obfuscated, so it's impossible to debug in the browser and I can't reproduce the same problem in hosted mode where I could use the Java debugger. I think the reason I'm only seeing the error on the deployed application is that the database I'm using on the GAE server is triggering something differently than the test database I'm using during testing and development. So, any ideas about the best way to proceed? I've thought of the following things: Deploy a non-obsfucated version of my application. Despite a lot of Googling, I can't figure out how to do this using the automatic deploy script provided with the Google Eclipse Plugin. Does anyone know? Download and copy my GAE data to the local server Somehow point my development code to use the GAE server for data instead of the local test database. This seems like the best idea... Can anyone suggest how to proceed here? Finally, is there a way to catch these JavaScript errors on the production server and log them somewhere? Without logging, I won't have anyway to know if my users are having errors that don't occur on the server. The GWT.log() function is automatically stripped out of the production code...

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• CSS Background image in Redmine template arbitrarily not loading

  - by Pekka

  I`m in the process of building a template for Redmine (a project management system based on Ruby on Rails.) Ruby is running on a virtual server from a Bitnami.org installation package. The OS is Windows. The template essentially consists of a styles.css file. In that file, I have the following line: #header { padding: 0px; padding-top: 48px; background-color: #62DFFF; background-image: url(../images/bkg.jpg) background-position: center bottom; background-repeat: repeat-x; height:150px; } It's a header element with a background image. The problem: This background image arbitrarily appears and disappears when reloading. Say you reload ten times in twenty seconds; the image will appear in two instances, and be missing in the 18 others. I would have put this down to server problems, but the weird thing is that when it's missing, the request for the image doesn't appear in Firebug's net tab at all. Even if it were cached, the request should be there. Raw screenshots of the identical page on two reloads: I am 100% sure the CSS file does not change in between. I have examined both instances with Firebug and the CSS is identical. It happens in both Firefox and Chrome so it must be something basic I'm overlooking. What could be causing a browser not to load a resource at all? I have zero idea about Ruby nor Rails - getting Redmine running and customized is all I have ever had to do with this platform - so I don't really know where to look. Apache's, Mongrel's and Redmine's error logs look fine, though.

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• UriMapper Problem

  - by jsop

  I have the following xaml (nonessential markup removed in the interest of brevity): <navigation:Frame x:Name="ContentFrame" > <navigation:Frame.UriMapper> <uriMapper:UriMapper> <uriMapper:UriMapping Uri="/{pageName}" MappedUri="/Views/{pageName}.xaml"/> <uriMapper:UriMapping Uri="/FMChart/{metricID}/{orgID}" MappedUri="/Views/FMChart.xaml?metricID={metricID}&orgID={orgID}"/> </navigation:Frame.UriMapper> </navigation:Frame.UriMapper> </navigation:Frame> I'm creating the HyperLinkButton objects dynamically (in code), like so: int metricID = 1; int orgID = 1; HyperlinkButton button = new HyperlinkButton(); button.Name = Guid.NewGuid().ToString(); button.TargetName = "ContentFrame"; // this string doesn't work string url = string.Format("/FMChart/{0}/{1}", metricID, orgID); button.NavigateUri = new Uri(url, UriKind.Relative); When I click the bbutton, the browser renders a blank page, and eventually presents me with a REALLY long stack trace (InvalidOperation exception). If I take the parameters out of th indicated line: string url = "/FMChart"; ...it works as expected (brings up the desired page). I've also tried the following strings: /FMChart/{0}&{1} /FMChart/{0}& amp;{1} What am I doing wrong?

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• Interrupting Prototype handler, alert() vs event.stop()

  - by lxs

  Here's the test page I'm using. This version works fine, forwarding to #success: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html><head> <script type="text/javascript" src="prototype.js"></script> </head><body> <form id='form' method='POST' action='#fail'> <button id='button'>Oh my giddy aunt!</button> <script type="text/javascript"> var fn = function() { $('form').action = "#success"; $('form').submit(); } $('button').observe('mousedown', fn); </script> </form> </body></html> If I empty the handler: var fn = function() { } The form is submitted, but of course we are sent to #fail this time. With an alert in the handler: var fn = function() { alert("omg!"); } The form is not submitted. This is awfully curious. With event.stop(), which is supposed to prevent the browser taking the default action: var fn = function(event) { event.stop(); } We are sent to #fail. So alert() is more effective at preventing a submission than event.stop(). What gives? I'm using Firefox 3.6.3 and Prototype 1.6.0.3. This behaviour also appears in Prototype 1.6.1.

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• CakePHP: Missing database table

  - by Justin

  I have a CakePHP application that is running fine locally. I uploaded it to a production server and the first page that uses a database connection gives the "Missing Database Table" error. When I look at the controller dump, it's complaining about the first table. I've tried a variety of things to fix this problem, with no luck: I've confirmed that at the command line I can login with the given MySQL credentials in database.php I've confirmed this table exists I've tried using the MySQL root credentials (temporarily) to see if the problem lies with permissions of the user. The same error appeared. My debug level is currently set to 3 I've deleted the entire contents of /app/tmp/cache I've set 777 permissions on /app/tmp* I've confirmed that I can run DESCRIBE commands at the commant line MySQL when logged in with the MySQL credentials used by by the application I've verified that the CakePHP log file only contains the error I'm setting in the browser window. I've tried all the suggestions I could find in similar postings on SO I've Googled around and didn't find any other ideas I think I've eliminating the obvious problems and my research isn't turning anything up. I feel like I'm missing something obvious. Any ideas?

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• Node-webkit works on Mac, crashes and can't load module on Windows

  - by user756201

  I've created a full node-webkit app that works fine on the Mac OSX version of node-webkit. Everything works, it loads a key external nodeJS module (marked), and the world is good. However, when I try to run the app on the Windows version of Node-webkit as described in the Wiki, the app crashes immediately (in fact, it crashes immediately when I try all the options: dragging a folder onto nw.exe, dragging an app.nw compressed folder, and running both from the command line). The only thing that gets me closer is opening nw.exe and then pointing the node-webkit location bar to the index file. Then I get this error: Uncaught node.js Error Error: Cannot find module 'marked' I tried commenting out the code that requires marked: var marked = require('marked'); That returns the app to crashing immediately. I assumed it was because of context issues between node.js and the node-webkit browser, but those seem to not be at fault since I tried this suggestion to make sure it finds the correct file for the marked module...went right back to immediate crashing. I'm out of ideas because the crashes don't seem to leave me any way of knowing what the error was.

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• VirtualHosting doesn't work. Logs me in through previous session

  - by Pablo

  When I log in with one browser session, I have to log in, but when I open another session it has automatically logged me in (as if I've picked up session 1), this does not happen if I use http://192.168.0.9:9070 It forces me to log in each time. So I know the application is working, it's just the proxy server that seems to apply the loging to each session (from http://icerap.limeo.com). # ************************************************************************ # Start of My stuff <<<------------------------------------------------------ # ************************************************************************ #<Proxy *> #Order Deny,Allow #Deny from all #Allow from 192.168.0 #</Proxy> # blog <VirtualHost *:80> ServerName icerap.limeo.com ProxyPass / http://192.168.0.9:9070/ ProxyPassReverse / http://192.168.0.9:9070/ </VirtualHost> # www <VirtualHost *:80> ServerName helpdesk.limeo.com ProxyPass / http://192.168.0.9:9055/ ProxyPassReverse / http://192.168.0.9:9055/ </VirtualHost> # blog <VirtualHost *:80> ServerName IceCake.limeo.com ProxyPass / http://192.168.0.9:9000/ ProxyPassReverse / http://192.168.0.9:9000/ </VirtualHost> # End of Limeo stuff <<<------------------------------------------------------ # ************************************************************************

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• Flex 4 / Flash 4 Add to Current State

  - by user163757

  I am having a little difficulty working with states in Flex (or Flash) 4. Lets say that my application has three states; the default (base) state, state 1, and state 2. State 1 should always be based on the base state, that's easy enough to accomplish. However, I would like state 2 to be based on the current state (either base or state 1). I can't for the life of me figure it out. I tried setting the basedOn property of state 1 to "this.currentState", but that just crashes my browser. <s:states> <s:State name="default"/> <s:State name="state1"/> <s:State name="state2" basedOn="{this.currentState}"/> </s:states> <s:TitleWindow id="configWindow" includeIn="state1" width="250" height="100%" close="configWindow_closeHandler(event)"/> <s:Panel id="settings" includeIn="state2" width="200" height="200"/>

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• Prevent TEXTAREAs scroll by themselves on IE8

  - by Justin Grant

  IE8 has a known bug (per connect.microsoft.com) where typing or pasting text into a TEXTAREA element will cause the textarea to scroll by itself. This is hugely annoying and shows up in many community sites, including Wikipedia. The repro is this: open the HTML below with IE8 (or use any long page on wikipedia which will exhibit the same problem until they fix it) size the browser full-screen paste a few pages of text into the TEXTAREA move the scrollbar to the middle position now type one character into the textarea Expected: nothing happens Actual: scrossing happens on its own, and the insertion point ends up near the bottom of the textarea! Below is repro HTML (can also see this live on the web here: http://en.wikipedia.org/w/index.php?title=Text_box&action=edit) <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <body> <div style="width: 80%"> <textarea rows="20" cols="80" style="width:100%;" ></textarea> </div> </body> </html>

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• How to send parameters with same encoding from javascript?

  - by nimcap

  I have a javascript file that lots of people have embedded to their pages. Since I am hosting the file, I have control over that javascript file; I cannot control the way it is embedded because lots of people is using it already. This javascript file sends GET requests to my servlets, and the parameters passed with the request are recorded to DB. For example, javascript sends a request to http://myserver.com/servlet?p1=123&p2=aString and then servlet records 123 and aString to DB somehow. Before sending strings I use encodeURIComponent() to encode it. But what I figured out is every client sends the same string with different encodings depending on either their browser or the site they are visiting. As a result, same strings are represented with different characters when it reaches servlet (so they are different strings). What I am trying to do is to convert the strings to one kind of encoding from javascript so when they reach the client same words are represented with same characters. How is this possible? PS. If there is a way to convert the encoding from Java it is also applicable.

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• Z-index broken in IE8?

  - by Anna

  Hi there This code works in every other browser I've tried, except IE8. IE8 appears to ignore the z-index - and the pop-up becomes a pop-under. It's in the right place, just renders underneath the thumbnail. Anyone? Thanks! HTML: <a class="thumbnail" href="#thumb"> <img src="/images/comic_a3_thumb.jpg" height="300" width="212" border="0" style="float:right; margin-top:10px;margin-bottom:10px;" alt="description" /> <span> <img src="/images/comic_a3_popup.jpg" /> /span> </a> CSS: .thumbnail{ position: relative; z-index: 0; } .thumbnail:hover{ background-color: transparent; z-index: 50; } .thumbnail span{ /*CSS for enlarged image*/ position: absolute; background-color: lightyellow; padding: 5px; left: 0px; border: 1px dashed gray; visibility: hidden; color: black; text-decoration: none; } .thumbnail span img{ /*CSS for enlarged image*/ border-width: 0; padding: 2px; } .thumbnail:hover span{ /*CSS for enlarged image on hover*/ visibility: visible; top: -140px; /*position where enlarged image should offset horizontally */ left: -500px; }

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• WCF webHttpBinding with jQuery AJAX - removing/working around same origin policy

  - by csauve

  So I'm trying to create a C# WCF REST service that is called by jQuery. I've discovered that jQuery requires that AJAX calls are made under the same origin policy. I have a few questions for how I might proceed. I am already aware of; 1. The hacky solution of JSONP with a server callback 2. The way too much server overhead of having a cross-domain proxy. 3. Using Flash in the browser to make the call and setting up crossdomain.xml at my WCF server root. I'd rather not use these because; 1. I don't want to use JSON, or at least I don't want to be restricted to using it 2. I would like to separate the server that serves static pages from the one that serves application state. 3. Flash in this day in age is out of the question. What I'm thinking: is there anything like Flash's crossdomain.xml file that works for jQuery? Is this "same-origin" policy a part of jQuery or is it a restriction in specific browsers? If it's just a part of jQuery, maybe I'll try digging in the code to work around it.

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• Prototypal inheritance should save memory, right?

  - by Techpriester

  Hi Folks, I've been wondering: Using prototypes in JavaScript should be more memory efficient than attaching every member of an object directly to it for the following reasons: The prototype is just one single object. The instances hold only references to their prototype. Versus: Every instance holds a copy of all the members and methods that are defined by the constructor. I started a little experiment with this: var TestObjectFat = function() { this.number = 42; this.text = randomString(1000); } var TestObjectThin = function() { this.number = 42; } TestObjectThin.prototype.text = randomString(1000); randomString(x) just produces a, well, random String of length x. I then instantiated the objects in large quantities like this: var arr = new Array(); for (var i = 0; i < 1000; i++) { arr.push(new TestObjectFat()); // or new TestObjectThin() } ... and checked the memory usage of the browser process (Google Chrome). I know, that's not very exact... However, in both cases the memory usage went up significantly as expected (about 30MB for TestObjectFat), but the prototype variant used not much less memory (about 26MB for TestObjectThin). I also checked: The TestObjectThin instances contain the same string in their "text" property, so they are really using the property of the prototype. Now, I'm not so sure what to think about this. The prototyping doesn't seem to be the big memory saver at all. I know that prototyping is a great idea for many other reasons, but I'm specifically concerned with memory usage here. Any explanations why the prototype variant uses almost the same amount of memory? Am I missing something?

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• Unexpected $end in PHP file

  - by mattbd

  I'm working on a PHP contact form, but I can't get it to work. I get the following error in the Apache server log, running on an Ubuntu Server VM: PHP Parse error: syntax error, unexpected $end in /home/matthew/Sites/contactFormResponse.php on line 75, referer: http://192.168.1.4/contactForm.php From googling this error, it sounds like it's normally caused by either using the short PHP tag when the server's not set up to recognise them, or by having a block of code that isn't closed correctly. But as far as I can see that isn't the case here - as far as I can see it's all closed correctly. Here's the PHP code: <?php error_reporting(E_ALL); // Define variables to hold the name, email address and message, and import the information into the variables $name = $_POST['NameInput']; $email = $_POST['EmailAddress']; $telno = $_POST['ContactNumber']; $querytype = $_POST['QueryType']; $bookingstartdate = $_POST['BookingStartDay'] . $_POST['BookingStartMonth'] . $_POST['BookingStartYear']; $bookingenddate = $_POST['BookingEndDay'] . $_POST['BookingEndMonth'] . $_POST['BookingEndYear']; $message = $_POST['QueryText']; // Validate the inputs - send it if it's OK if(3 < strlen($name) && 3 < strlen($email)) { $email_message = <<< EMAIL Message from contact form at holidaychalet.co.uk Name: $name Email: $email Contact Number: $telno Query Type: $querytype Booking Start Date: $bookingstartdate Booking End Date: $bookingenddate The message: $message EMAIL; $headers = "cc:[email protected]\r\n"; if(mail('matthew@localhost','Contact form email', $email_message, $headers)) { echo "Thanks for completing the form! I'll be in touch shortly!"; } else { echo "Something went wrong - please use the back button and try again"; } } else { echo "You didn't complete the form fully enough! Please use go back using your web browser's back button"; } ?>

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• Browsers disagree about the text of a body element

  - by Charles Anderson

  My HTML looks like this: <html> <head> <title>Test</title> <script type="text/javascript" src="jQuery.js"></script> <script type="text/javascript"> function init() { var text = jQuery('body').text(); alert('length = ' + text.length); } </script> </head> <body onload="init()">0123456789</body> </html> When I load this in Firefox, the length is reported as 10. However, in Chrome it's 11 because it thinks there's a linefeed after the '9'. In IE it's also 11, but the last character is an escape. Meanwhile, Opera thinks there are 12 characters, with the last two being CR LF. If I change the body element to include a span: <body onload="init()"><span>0123456789</span></body> and the jQuery call to: var text = jQuery('body span').text(); then all the browsers agree that the length is 10. Clearly it's the body element that's causing the issue, but can anyone explain exactly why this is happening? I'm particularly surprised because the excellent jQuery is normally browser-independent.

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• Newbie question: undefined local variable or method , why??

  - by Mellon

  I am new in Rails (I am using Rails 3.0.3), currently I am following the book "Agile Web Development with Rails" to develop a simple rails application. I followed the book to: --create a model 'Cart' class; --implement 'add_to_cart' method in my 'store_controller', I have a line of code <%=button_to "Add to Cart", :action => add_to_cart, :id => product %> in my /store/index.html.erb As you see, there is :action => add_to_cart in my index.html.erb, which will invoke the add_to_cart method in my *Controllers/store_controller.rb* But after I refresh the browser, I got the error "undefined local variable or method 'add_to_cart'", apparently I do have the method add_to_cart in my 'store_controller.rb', why I got this error??? What is the possible cause??? Here are my codes: store_controller.rb class StoreController < ApplicationController def index @products = Product.find_products_for_sale end def add_to_cart product = Product.find(params[:id]) @cart = find_cart @cart.add_product(product) end private def find_cart session[:cart] ||= Cart.new end end /store/index.html.erb <h1>Your Pragmatic Catalog</h1> <% @products.each do |product| -%> <div class="entry"> <%= image_tag(product.image_url) %> <h3><%=h product.title %></h3> <%= product.description %> <div class="price-line"> <span class="price"><%= number_to_currency(product.price) %></span> <!-- START_HIGHLIGHT --> <!-- START:add_to_cart --> **<%= button_to 'Add to Cart', :action => 'add_to_cart', :id => product %>** <!-- END:add_to_cart --> <!-- END_HIGHLIGHT --> </div> </div> <% end %> Model/cart.rb class Cart attr_reader :items def initialize @items = [] end def add_product(product) @items << product end end

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• Sorting by custom field and fetching whole tree from DB

  - by Niaxon

  Hello everyone, I am trying to do file browser in a tree form and have a problem to sort it somehow. I use PHP and MySQL for that. I've created mixed (nested set + adjacency) table 'element' with the following fields: element_id, left_key, right_key, level, parent_id, element_name, element_type (enum: 'folder','file'), element_size. Let's not discuss right now that it is better to move information about element (name, type, size) into other table. Function to scan specified directory and fill table work correctly. Noteworthy, i am adding elements to tree in specific order: folders first and then files. After that i can easily fetch and display whole table on the page using simple query: SELECT * FROM element WHERE 1=1 ORDER BY left_key With the result of that query and another function i can generate correct html code (<ul><li>... and so on). to display tree. Now back to the question (finally, huh?). I am struggling to add sorting functionality. For example i want to order my result by size. Here i need to keep in my mind whole hierarchy of tree and rule: folders first, files later. I believe i can do that by generating in PHP recursive query: SELECT * FROM element WHERE parent_id = {$parentId} ORDER BY element_type (so folders would be first), size (or name for example) asc/desc After that for each result which has type = 'folder' i will send another query to get it's content. Also it's possible to fetch whole tree by left_key and after that sort it in PHP as array but i guess that would be worse :) I wonder if there is better and more efficient way to do such a thing?

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• Sending and receiving IM messages via controller in Rails

  - by Grnbeagle

  Hi, I need a way to handle XMPP communication in my Rails app. My requirements are: Keep an instance of XMPP client running and logged in as one specific user (my bot user) Trigger an event from a controller to send a message and wait for a reply. The message is sent to another machine equipped with a bot so that the reply is supposed to be returned quickly. I installed xmpp4r and backgrounDrb similar to what's described here, but backgrounDrb seems to have evolved and I couldn't get it to wait for a reply. If it has to happen asynchronously, I am willing to use a server-push technology to notify the browser when the reply arrives. To give you a better idea, here are snippets of my code: (In controller) class ServicesController < ApplicationController layout 'simple' def index render :text => "index" end def show @my_service = Service.find(params[:id]) worker = MiddleMan.worker(:jabber_agent_worker) worker.send_request(:arg => {:jid => "someuser@someserver", :cmd => "help"}) render :text => "testing" end end (In worker script) require 'xmpp4r' require 'logger' class JabberAgentWorker < BackgrounDRb::MetaWorker set_worker_name :jabber_agent_worker def create(args = nil) jid = Jabber::JID.new('myagent@myserver') @client = Jabber::Client.new(jid) @client.connect @client.auth('pass') @client.send(Jabber::Presence.new.set_show(:chat).set_status('BackgrounDRb')) @client.add_message_callback do |message| logger.info("**** messaged received: #{message}") # never reaches here end end def send_request(args = nil) to_jid = Jabber::JID.new(args[:jid]) message = Jabber::Message::new(to_jid, args[:cmd]).set_type(:normal).set_id('1') @client.send(message) end end If anyone can tell me any of the following, I'd much appreciate it: issue with my backgrounDrb usage other background process alternatives appropriate for XMPP interactions other ways of achieving this Thanks in advance.

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