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  • Good ways to restart all the computers in a remote cluster?

    - by vgm64
    I have a cluster that I manage and from time to time I get emails from each node (and head node) begging to be restarted after an automatic upgrade. Currently, my best solution so far is a shell script like: $> cat cluster_reboot.sh ssh [email protected] reboot ssh [email protected] reboot ssh [email protected] reboot ssh [email protected] reboot ssh [email protected] reboot ssh [email protected] reboot I end up just typing the root password six times, but it works, I guess. Is there a better way? Can I force the head node to reboot the computers for me?

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  • How to set 2 conditions / criterias for VLOOKUP / LOOKUP / etc in OpenOffice Calc (or Excel)

    - by MestreLion
    I have this spreadsheet that started as a silly aid for a game (Mafia Wars 2), but grew into a tricky spreadsheet question. In the game your character have 9 "slots" for weapons and armors, 1 for each "type": Light Weapon, Heavy Weapon, Body Armor, Head Armor, etc. So I made a list of all weapons and armors available in the game, 1 item per row. Example: SHOP ITEM TYPE ITEM NAME ATK DEF PRICE EQUIPPED? Marketplace Weapon Light Konrad Knife 16 5 5.500 Marketplace Weapon Light Ice Queen 19 6 8.200 Marketplace Armor Body Up Layered Polym 0 31 8.600 Marketplace Armor Body Up Full Shield 7 42 17.650 Marketplace Weapon Heavy Konrad Bullpup 53 25 24.500 Marketplace Weapon Heavy Full Moon Blow 73 12 24.500 x Marketplace Armor Body Low Knee Pads 17 26 14.200 x Marketplace Armor Body Low Army Boots 15 55 24.500 Bone Yard Weapon Light Bone Launcher 41 2 9.400 x Neon Strip Vehicle Ground Supercharged 41 34 24.500 Dead End Weapon Heavy Sharp Sickle 21 5 24.500 Dead End Armor Body Low Unholy Boots 5 36 15.000 Dead End Armor Head Hockey Mask 5 18 15.900 x Last columns is an indication of the items i have already bought and equipped (marked with "x"). What I need is a formula that, for each "slot" (item type), returns info related to the item of that kind that I am using. That would be: ITEM TYPE SHOP NAME ITEM NAME ATK DEF PRICE Weapon Light Bone Yard Bone Launcher 41 2 9.400 Weapon Heavy Marketplace Full Moon Blow 73 12 24.500 Weapon Special -- -- -- -- -- Armor Body Up -- -- -- -- -- Armor Body Low Marketplace Knee Pads 17 26 14.200 Armor Head Dead End Hockey Mask 5 18 15.900 Vehicle Ground -- -- -- -- -- Vehicle Water -- -- -- -- -- Vehicle Air -- -- -- -- -- The item types are fixed, so they can be hard coded. Each row for an item type. So, for 1st result line, it would return data from the row where both 2nd column is "Weapon Light" and last column is "x". Basically I need a LOOKUP (or VLOOKUP, or anything else) that uses 2 criteria to find a given row, the item type and the X marker. Question is: HOW? I am using OpenOffice Calc 3.2.1, but since it shares so many functions with MS Excel, answers for Excel are also fine (as long as it only uses regular formulas, no VBScript or Macros or VBA etc) Last but not least, suggestions / solutions for rearranging the data so it makes this problem easier to solve are also welcome. Thanks!

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  • Oracle HTTP Server access_log - GET /error/404.html HTTP/1.0 200 7001 entries

    - by Pavan
    access_log shows the following entries repeatedly, seems like it is polling some thing. There were so many entries keep on adding to the log, making it difficult to debug for actual error message. aaa.bbb.ccc.ddd - - [07/Nov/2012:00:02:48 -0800] "HEAD /index.html HTTP/1.1" 200 - abc.bcd.cda.dab - - [07/Nov/2012:00:02:50 -0800] "GET /error/404.html HTTP/1.0" 200 7001 abc.bcd.cda.dac - - [07/Nov/2012:00:02:51 -0800] "GET /error/404.html HTTP/1.0" 200 7001 abc.bcd.cda.dab - - [07/Nov/2012:00:02:56 -0800] "GET /error/404.html HTTP/1.0" 200 7001 abc.bcd.cda.dac - - [07/Nov/2012:00:02:56 -0800] "GET /error/404.html HTTP/1.0" 200 7001 abc.bcd.cda.dab - - [07/Nov/2012:00:03:01 -0800] "GET /error/404.html HTTP/1.0" 200 7001 abc.bcd.cda.dac - - [07/Nov/2012:00:03:01 -0800] "GET /error/404.html HTTP/1.0" 200 7001 abc.bcd.cda.dab - - [07/Nov/2012:00:03:06 -0800] "GET /error/404.html HTTP/1.0" 200 7001 abc.bcd.cda.dac - - [07/Nov/2012:00:03:06 -0800] "GET /error/404.html HTTP/1.0" 200 7001 aaa.bbb.ccc.ddd - - [07/Nov/2012:00:03:08 -0800] "HEAD /index.html HTTP/1.1" 200 - how to avoid these repeating entries?

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  • Tutorial for Quick Look Generator for Mac

    - by vgm64
    I've checked out Apple's Quick Look Programming Guide: Introduction to Quick Look page in the Mac Dev Center, but as a more of a science programmer rather than an Apple programmer, it is a little over my head (but I could get through it in a weekend if I bash my head against it long enough). Does anyone know of a good basic Quick Look Generators tutorial that is simple enough for someone with only very modest experience with Xcode? For those that are curious, I have a filetype called .evt that has an xml header and then binary info after the header. I'm trying to write a generator to display the xml header. There's no application bundle that it belongs to. Thanks!

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  • Tutuorial for Quick Look Generator for Mac

    - by vgm64
    I've checked out Apple's Quick Look Programming Guide: Introduction to Quick Look page in the Mac Dev Center, but as a more of a science programmer rather than an Apple programmer, it is a little over my head (but I could get through it in a weekend if I bash my head against it long enough). Does anyone know of a good basic Quick Look Generators tutorial that is simple enough for someone with only very modest experience with Xcode? For those that are curious, I have a filetype called .evt that has an xml header and then binary info after the header. I'm trying to write a generator to display the xml header. There's no application bundle that it belongs to. Thanks!

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  • Struts 2- problem with s:action tag

    - by Raghave
    Here is a small test application that does following things ask user to enter his name and submit - (index.jsp) as a result of index.jsp is the welcome.jsp page that asks user to select his/her blood group index.jsp <%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%> <%@ taglib prefix="s" uri="/struts-tags" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <form action="MyName"> <s:textfield name="UserName" label="Enter Your Name"/> <s:submit/> </form><br> </body> </html> struts.xml <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd"> <struts> <package name="module1" namespace="" extends="struts-default"> <action name="MyName" class="module1.User"> <result>/Welcome.jsp</result> </action> <action name="Blood_Group" class="module1.SelectBloodGroup" method="bloodGroupList"/> </package> </struts> SelectBloodGroup.java package module1; import java.util.ArrayList; import com.opensymphony.xwork2.ActionSupport; public class SelectBloodGroup extends ActionSupport{ private ArrayList<BloodGroup> bglist; public String bloodGroupList(){ bglist = new ArrayList<BloodGroup>(); bglist.add(new BloodGroup("1","A+")); bglist.add(new BloodGroup("2","B+")); bglist.add(new BloodGroup("3","AB+")); bglist.add(new BloodGroup("4","O+")); bglist.add(new BloodGroup("5","A-")); bglist.add(new BloodGroup("6","B-")); bglist.add(new BloodGroup("7","AB-")); bglist.add(new BloodGroup("8","O-")); return "SUCCESS"; } public ArrayList<BloodGroup> getBglist(){ return bglist; } } class BloodGroup{ private String id; private String bg; BloodGroup(String id,String bg){ this.id=id; this.bg=bg; } } welcome.jsp <%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%> <%@ taglib prefix="s" uri="/struts-tags" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <s:action name="Blood_Group" executeResult="false"/> //***************here is the problem*************** <s:select list="bglist" listKey="id" listValue="bg"/> //*********************************************** </body> </html> Struts is unable to identify bglist as a collection or Array or List or iterator. WHAT SHOULD I ASSIGN TO list ATTRIBUTE IN THE s:select TAG IN THE FILE welcome.jsp What is wrong with the code please tell me in detail. If you could send me the correted version. WHY IS THE s:action Tag not working ? This is the error i am getting Apr 13, 2010 1:49:19 PM org.apache.catalina.core.ApplicationDispatcher invoke SEVERE: Servlet.service() for servlet jsp threw exception tag 'select', field 'list': The requested list key 'bglist' could not be resolved as a collection/array/map/enumeration/iterator type. Example: people or people.{name} - [unknown location]

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  • HTML and PHP simple contact form.

    - by user317128
    I tried to make a simple contact form via HTML and PHP but the form doesnt seem to submit. it stays on the HTML page and doesnt post to the php form. would love someone to look over the code, thanks in advanced. simple_form.html cdoe <!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"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Simple Feedback Form</title> </head> <body> <form action="send_simpleform.php" method="post"> <p>Your name<br /> <input name="sender_name" type="text" size="30" /></p> <p>Email<br /> <input name="sender_email" type="text" size="30" /></p> <p>Message<br /> <textarea name="message" cols="30" rows="5"></textarea></p> <input name="submit" type="button" value="Send This Form" /> </form> </body> </html> send_simpleform.php code <? if (($_POST[sender_name] == "") || ($_POST[sender_email] == "") || ($_POST[message] == "") { header("Location: simple_form.php"); exit; } $msg = "Email sent from wwwsite\n"; $msg .= "Sender's Name:\t $_POST[senders_name]\n"; $msg .= "Sender's E-mail:\t $_POST[senders_email]\n"; $msg .= "Sender's Message:\t $_POST[message]\n"; $to = "[email protected]"; $subject = "Website feedback message"; $mailheaders = "From: My web site <www.testwebsite.com>\n"; $mailherders .= "Reply to: $_POST[sender_email]\n"; $mail($to, $subject, $msg, $mailheaders); ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Simple Feedback Form Sent</title> </head> <body> <h1>The following email has been sent</h1> <p>Your Name:<br /> <? echo "$_POST[sender_name]"; ?> <p>Your Email Adress:<br /> <? echo "$_POST[sender_email]"; ?> <p>Message:<br /> <? echo "$_POST[message]"; ?> </p> </body> </html>

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  • OpenVZ vs Xen, how much difference in performance?

    - by Aleksandr Levchuk
    There is a Xen vs. KVM in performance question on ServerFault. What will be the performance difference if the choice is between Xen and OpenVZ? How is it best to measure? Some may say "you're comparing apples and oranges" but I have to choose one of the two and it needs to be wise choice. Performance is most important to us. We may switching to Xen from OpenVZ because Xen is more ubiquitous but only if performance difference is not significant. In January 2011 I'm thinking of doing a head to head performance comparison - here is my project proposal to our Bioinformatics facility director.

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  • php cookie not working

    - by Jacksta
    I am trying to use a cookie with authentication. This page works once entering user and pass <? if ((!$_POST[username]) || (!$_POST[password])) { header("Location: show_login.html"); exit; } $db_name = "testDB"; $table_name = "auth_users"; $connection = @mysql_connect("localhost", "user", "pass") or die(mysql_error()); $db = @mysql_select_db($db_name, $connection) or die(mysql_error()); $sql = "SELECT * FROM $table_name WHERE username ='$_POST[username]' AND password = password('$_POST[password]')"; $result = @mysql_query($sql, $connection) or die(mysql_error()); $num = mysql_num_rows($result); if ($num != 0) { $cookie_name = "auth"; $cookie_value = "ok"; $cookie_expire = "0"; $cookie_domain = "domain.com.au"; setcookie($cookie_name, $cookis_value, $cookie_expire, "/", $cookie_domain, 0); $display_block = " <p><strong>Secret Menu:</strong></p> <ul> <li><a href=\"secretA.php\">secret page A</a> <li><a href=\"secretB.php\">secret page B</a> </ul>"; } else { header("Location: show_login.html"); exit; } ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Secret Area</title> </head> <body> <? echo "$display_block"; ?> </body> </html> WHen clicking on either secretA.php or secretB.php I am redirected to log in again, it should work. here is the code. secretB.php <?php if ($_COOKIE[auth] == "ok") { $msg = "<p>Welcome to secret page B, authorised user! </P>"; } else { header( "Location: /show_login.html"); exit; } ?> <HTML> <HEAD> <title>Secret Page B:</title> </HEAD> <BODY> <? echo "$msg"; ?> </BODY> </HTML>

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  • Foreign keys and pagination

    - by whitstone86
    This is my pagination script: <?php /*********************************** * PhpMyCoder Paginator * * Created By PhpMyCoder * * 2010 PhpMyCoder * * ------------------------------- * * You may use this code as long * * as this notice stays intact and * * the proper credit is given to * * the author. * ***********************************/ ?> <head> <title> Pagination Test - Created By PhpMyCoder</title> <style type="text/css"> #nav { font: normal 13px/14px Arial, Helvetica, sans-serif; margin: 2px 0; } #nav a { background: #EEE; border: 1px solid #DDD; color: #000080; padding: 1px 7px; text-decoration: none; } #nav strong { background: #000080; border: 1px solid #DDD; color: #FFF; font-weight: normal; padding: 1px 7px; } #nav span { background: #FFF; border: 1px solid #DDD; color: #999; padding: 1px 7px; } </style> </head> <?php //Require the file that contains the required classes include("pmcPagination.php"); //PhpMyCoder Paginator $paginator = new pmcPagination(20, "page"); //Connect to the database mysql_connect("localhost","root","PASSWORD"); //Select DB mysql_select_db("tvguide"); //Select only results for today and future $result = mysql_query("SELECT programme, channel, airdate, expiration, episode, setreminder FROM epdata1 where airdate >= now() order by expiration GROUP BY airdate"); //You can also add reuslts to paginate here mysql_data_seek($queryresult,0) ; while($row = mysql_fetch_array($result)) { $paginator->add(new paginationData($row['programme'], $row['channel'], $row['airdate'], $row['expiration'], $row['episode'], $row['setreminder'])); } ?> <?php //Show the paginated results $paginator->paginate (); ?><? include("pca-footer1.php"); ?> <?php //Show the navigation $paginator->navigation(); ?> However, I have two tables in this, and they are epdata1 (where the airtimes for my show House M.D. are) and housemdep plus the setreminder table. How can I use foreign keys in relation to this? I'm not sure if this will work for my script, but am willing to try. What I would like to do is to select certain episodes from the table housemdep (episodes of the show) and if any are selected it shows them as this: House M.D. showing on Channel 1 June 6th - 8:00pm "Wilson" Set Reminder House M.D. showing on Channel 1 June 7th - 1:30am "Wilson" Set Reminder House M.D. showing on Channel 1 June 7th - 12:55pm "House's Head" Set Reminder or like this, if I have not selected an episode from the row: House M.D. showing on Channel 1 June 7th - 8:00pm "House's Head" Set Reminder House M.D. showing on Channel 1 June 8th - 9:00pm Set Reminder House M.D. showing on Channel 1 June 9th - 2:30pm Set Reminder House M.D. showing on Channel 1 June 7th - 8:00pm "Que Sera Sera" Set Reminder Foreign keys and relationship of interlinked tables are new to me, if anyone could help I'd appreciate this. I've tried some of what Google suggested on foreign keys in another version of this script (this is a clone of the original on my localhost server running Apache and PHP 5.28/MySQL), but am not sure how to implement this. Thanks.

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  • IP telephony open source systems

    - by danke
    I'm trying to pick an IP telephony technology to learn. I heard of Asterisk, trixbox, freePBX, and my head was already spinning being not sure what to learn. Then I came across this article listing some more like Kamailio, Yate, CallWeaver, FreeSWITCH, SipXecs and now my head REALLY is spinning http://www.cio.com.au/article/323016/five_open_source_ip_telephony_projects_watch . Can someone give me a run down of how all these technologies tie together? What is the trend now, because I'd like to start learning. Note: Anyone please re-tag this question if you know better, because I'm new to this field and not sure about the best tags.

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  • php slideshow sample

    - by serhio
    I try to do a simple image slideshow in php (just cycle images, no links, no other effects). after some googling I found the following in net: <HTML> <HEAD> <TITLE>Php Slideshow</TITLE> <script language="javascript"> var speed = 4000; // time picture is displayed var delay = 3; // time it takes to blend to the next picture x = new Array; var y = 0; <?php $tel=0; $tst='.jpg'; $p= "./images"; $d = dir($p); $first = NULL; while (false !== ($entry = $d->read())) { if (stristr ($entry, $tst)) { $entry = $d->path."/".$entry; print ("x[$tel]='$entry';\n"); if ($first == NULL) { $first = $entry; } $tel++; } } $d->close(); ?> function show() { document.all.pic.filters.blendTrans.Apply(); document.all.pic.src = x[y++]; document.all.pic.filters.blendTrans.Play(delay); if (y > x.length - 1) y = 0; } function timeF() { setTimeout(show, speed); } </script> </HEAD> <BODY > <!-- add html code here --> <?php print ("<IMG src='$first' id='pic' onload='timeF()' style='filter:blendTrans()' >"); ?> <!-- add html code here --> </BODY> </HTML> but it displays only the first image from the cycle. Do I something wrong? the resulting HTML page is: <HTML> <HEAD> <TITLE>Php Slideshow</TITLE> <script language="javascript"> var speed = 4000; // time picture is displayed var delay = 3; // time it takes to blend to the next picture x = new Array; var y = 0; x[0]='./images/under_construction.jpg'; x[1]='./images/BuildingBanner.jpg'; x[2]='./images/littleLift.jpg'; x[3]='./images/msfp_smbus1_01.jpg'; x[4]='./images/escalator.jpg'; function show() { document.all.pic.filters.blendTrans.Apply(); document.all.pic.src = x[y++]; document.all.pic.filters.blendTrans.Play(delay); if (y > x.length - 1) y = 0; } function timeF() { setTimeout(show, speed); } </script> </HEAD> <BODY > <!-- add html code here --> <IMG src='./images/under_construction.jpg' id='pic' onload='timeF()' style='filter:blendTrans()' ><!-- add html code here --> </BODY> </HTML>

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  • How to align text at the top left-hand corner?

    - by OverTheRainbow
    I'd like to use stylesheet instead of hard-coding HTML so that text within cells are aligned vertically, ie. text starts at the upper left-hand corner. However, neither of this works: <head> <link rel="STYLESHEET" href="display.css" type="text/css"> <style> td {vertical-align:top; font-size:x-small} td {vertical-align:text-top; font-size:x-small} </style> </head> Does someone know? Thank you. Edit: Problem solved. Turns out the HTML editor I'm using is a bit old and didn't display things as expected, but they do show OK in a modern browser with "vertical-align:top".

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  • jquerymobile - include .js and .html

    - by Girija
    Hi, I have described the my problem in the following lines. Kindly clarify me. In my application,I am using more than html page for displaying the content and each page have own .js file. When I call the html page then .js file also included. In the .js,I am using $('div').live('pageshow',function(){}). I am calling the html file from the .js(using $.mobile.changePage("htmlpage")). My problem : consider, I have two html files. second.html file is called with in the one.js. when I show the second.html, that time one.js is reload again. I am getting the alert "one.js" then "second.js" Please help me. Thanks in advance. Please point out my mistake. I have attached the code. one.html <!DOCTYPE html> <html> <head> <title>Page Title</title> <link rel="stylesheet" href="jquery.mobile-1.0a2.min.css" /> <script src="jquery-1.4.3.min.js"></script> <script src="jquery.mobile-1.0a2.min.js"></script> <script src="Scripts/one.js"></script> </head> <body> <div data-role="page"> </div> </body> </html> Second.html <!DOCTYPE html> <html> <head> <title>Sample </title> <link rel="stylesheet" href="../jquery.mobile-1.0a2.min.css" /> <script src="../jquery-1.4.3.min.js"></script> <script src="../jquery.mobile-1.0a2.min.js"></script> <script type="text/javascript" src="Scripts/second.js"></script> </head> <body> <div data-role="page"> <div data-role="button" id="link" >Second</div> </div><!-- /page --> </body> </html> one.js $('div').live('pageshow',function() { alert("one.js"); //AJAX Calling //success result than call the second.html $.mobile.changePage("second.html"); }); second.js $('div').live('pageshow',function(){ { alert('second.js'); //AJAX Calling //success result than call the second.html $.mobile.changePage("third.html"); }); Note : When I show forth.html that time the following files are reload(one.js,second.js,third,js and fourth.js. But I need fourth.js alone). I tried to use the $.document.ready(function(){}); but that time .js did not call. :( :( :(

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  • sometime SetCookie() not working

    - by Nano HE
    Hi I created two file to switch my forum (Language Chinese and English) enForum.php <?php function foo() { global $_COOKIES; setcookie('ForumLangCookie', 'en', time()+3600, '/', '.mysite.com'); echo 'running<br>'; $_COOKIES['ForumLangCookie'] = 'en'; bar(); } // foo() function bar() { global $_COOKIES; if (empty($_COOKIES['ForumLangCookie'])) { die('cookie_name is empty'); } echo 'Language =' . $_COOKIES['ForumLangCookie']; echo "<br>"; } // bar() foo(); ?> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>forum EN Version</title> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> </head> <body> please be patient ... <script LANGUAGE='javascript'> location.href='http://www.mysite.com/forum/index.php'; </script> </body> </html> cnForum.php <?php function foo() { global $_COOKIES; setcookie('ForumLangCookie', 'cn', time()+3600, '/', '.mysite.com'); echo 'running<br>'; $_COOKIES['ForumLangCookie'] = 'cn'; bar(); } // foo() function bar() { global $_COOKIES; if (empty($_COOKIES['ForumLangCookie'])) { die('cookie_name is empty'); } echo 'Language =' . $_COOKIES['ForumLangCookie']; echo "<br>"; } // bar() foo(); ?> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>forum CN Version</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head> <body> please be patient ... <script LANGUAGE='javascript'> location.href='http://www.mysite.com/forum/index.php'; </script> </body> </html> There are some files including include template('foo'); , I will get the Cookie value and load different template files. But sometime the SetCookie() not working. Do I need add Sleep(someSeconds); for my code?

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  • Why does jquery leak memory so badly?

    - by Thomas Lane
    This is kind of a follow-up to a question I posted last week: http://stackoverflow.com/questions/2429056/simple-jquery-ajax-call-leaks-memory-in-ie I love the jquery syntax and all of its nice features, but I've been having trouble with a page that automatically updates table cells via ajax calls leaking memory. So I created two simple test pages for experimenting. Both pages do an ajax call every .1 seconds. After each successful ajax call, a counter is incremented and the DOM is updated. The script stops after 1000 cycles. One uses jquery for both the ajax call and to update the DOM. The other uses the Yahoo API for the ajax and does a document.getElementById(...).innerHTML to update the DOM. The jquery version leaks memory badly. Running in drip (on XP Home with IE7), it starts at 9MB and finishes at about 48MB, with memory growing linearly the whole time. If I comment out the line that updates the DOM, it still finishes at 32MB, suggesting that even simple DOM updates leak a significant amount of memory. The non-jquery version starts and finishes at about 9MB, regardless of whether it updates the DOM. Does anyone have a good explanation of what is causing jquery to leak so badly? Am I missing something obvious? Is there a circular reference that I'm not aware of? Or does jquery just have some serious memory issues? Here is the source for the leaky (jquery) version: <html> <head> <script type="text/javascript" src="http://www.google.com/jsapi"></script> <script type="text/javascript"> google.load('jquery', '1.4.2'); </script> <script type="text/javascript"> var counter = 0; leakTest(); function leakTest() { $.ajax({ url: '/html/delme.x', type: 'GET', success: incrementCounter }); } function incrementCounter(data) { if (counter<1000) { counter++; $('#counter').text(counter); setTimeout(leakTest,100); } else $('#counter').text('finished.'); } </script> </head> <body> <div>Why is memory usage going up?</div> <div id="counter"></div> </body> </html> And here is the non-leaky version: <html> <head> <script type="text/javascript" src="http://yui.yahooapis.com/2.8.0r4/build/yahoo/yahoo-min.js"></script> <script type="text/javascript" src="http://yui.yahooapis.com/2.8.0r4/build/event/event-min.js"></script> <script type="text/javascript" src="http://yui.yahooapis.com/2.8.0r4/build/connection/connection_core-min.js"></script> <script type="text/javascript"> var counter = 0; leakTest(); function leakTest() { YAHOO.util.Connect.asyncRequest('GET', '/html/delme.x', {success:incrementCounter}); } function incrementCounter(o) { if (counter<1000) { counter++; document.getElementById('counter').innerHTML = counter; setTimeout(leakTest,100); } else document.getElementById('counter').innerHTML = 'finished.' } </script> </head> <body> <div>Memory usage is stable, right?</div> <div id="counter"></div> </body> </html>

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  • Is a larger hard drive with the same cache, rpm, and bus type faster?

    - by Joel Coehoorn
    I recently heard that, all else being equal, larger hard are faster than smaller. It has to do with more bits passing under the read head as the drive spins - since a large drive packs the bits more tightly, the same amount of spin/time presents more data to the read head. I had not heard this before, and was inclined to believe the the read heads expected bits at a specific rate and would instead stagger data, so that the two drives would be the same speed. I now find myself looking at purchasing one of two computer models for the school where I work. One model has an 80GB drive, the other a 400GB (for ~$13 more). The size of the drive is immaterial, since users will keep their files on a file server where they can be backed up. But if the 400GB drive will really deliver a performance boost to the hard drive, the extra money is probably worth it. Thoughts?

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  • How to write a bison grammer for WDI?

    - by Rizo
    I need some help in bison grammar construction. From my another question: I'm trying to make a meta-language for writing markup code (such as xml and html) wich can be directly embedded into C/C++ code. Here is a simple sample written in this language, I call it WDI (Web Development Interface): /* * Simple wdi/html sample source code */ #include <mySite> string name = "myName"; string toCapital(string str); html { head { title { mySiteTitle; } link(rel="stylesheet", href="style.css"); } body(id="default") { // Page content wrapper div(id="wrapper", class="some_class") { h1 { "Hello, " + toCapital(name) + "!"; } // Lists post ul(id="post_list") { for(post in posts) { li { a(href=post.getID()) { post.tilte; } } } } } } } Basically it is a C source with a user-friendly interface for html. As you can see the traditional tag-based style is substituted by C-like, with blocks delimited by curly braces. I need to build an interpreter to translate this code to html and posteriorly insert it into C, so that it can be compiled. The C part stays intact. Inside the wdi source it is not necessary to use prints, every return statement will be used for output (in printf function). The program's output will be clean html code. So, for example a heading 1 tag would be transformed like this: h1 { "Hello, " + toCapital(name) + "!"; } // would become: printf("<h1>Hello, %s!</h1>", toCapital(name)); My main goal is to create an interpreter to translate wdi source to html like this: tag(attributes) {content} = <tag attributes>content</tag> Secondly, html code returned by the interpreter has to be inserted into C code with printfs. Variables and functions that occur inside wdi should also be sorted in order to use them as printf parameters (the case of toCapital(name) in sample source). Here are my flex/bison files: id [a-zA-Z_]([a-zA-Z0-9_])* number [0-9]+ string \".*\" %% {id} { yylval.string = strdup(yytext); return(ID); } {number} { yylval.number = atoi(yytext); return(NUMBER); } {string} { yylval.string = strdup(yytext); return(STRING); } "(" { return(LPAREN); } ")" { return(RPAREN); } "{" { return(LBRACE); } "}" { return(RBRACE); } "=" { return(ASSIGN); } "," { return(COMMA); } ";" { return(SEMICOLON); } \n|\r|\f { /* ignore EOL */ } [ \t]+ { /* ignore whitespace */ } . { /* return(CCODE); Find C source */ } %% %start wdi %token LPAREN RPAREN LBRACE RBRACE ASSIGN COMMA SEMICOLON CCODE QUOTE %union { int number; char *string; } %token <string> ID STRING %token <number> NUMBER %% wdi : /* empty */ | blocks ; blocks : block | blocks block ; block : head SEMICOLON | head body ; head : ID | ID attributes ; attributes : LPAREN RPAREN | LPAREN attribute_list RPAREN ; attribute_list : attribute | attribute COMMA attribute_list ; attribute : key ASSIGN value ; key : ID {$$=$1} ; value : STRING {$$=$1} /*| NUMBER*/ /*| CCODE*/ ; body : LBRACE content RBRACE ; content : /* */ | blocks | STRING SEMICOLON | NUMBER SEMICOLON | CCODE ; %% I am having difficulties on defining a proper grammar for the language, specially in splitting WDI and C code . I just started learning language processing techniques so I need some orientation. Could someone correct my code or give some examples of what is the right way to solve this problem?

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  • Change the content of a <style> element through JavaScript

    - by paercebal
    The Problem I have the following code: <html> <head> <style id="ID_Style"> .myStyle { color : #FF0000 ; } </style> </head> <body> <p class="myStyle"> Hello World ! </p> </body> </html> And I want to modify the contents of <style> through JavaScript. The Expected Solution The first solution was to use the innerHTML property of the style element (retrieved through its id), but while it works on Firefox, it fails on Internet Explorer 7. So, I used pure DOM methods, that is, creating an element called style, a text node with the desired content, and append the text node as a child of the style node, etc. It fails, too. According to MSDN, the <style> element has an innerHTML property, and according to W3C, the <style> element is a HTMLStyleElement, which derives from HTMLElement, deriving from Element deriving from Node, which has the appendChild method. It seems to behave as if the content of a <style> element was readonly on Internet Explorer. The Question So the question is: Is there a way to modify the content of a <style> element on Internet Explorer? While the current problem is with IE7, a cross-browser solution would be cool, if possible. Appendix Sources: Style Element (MSDN): http://msdn.microsoft.com/en-us/library/ms535898.aspx HTMLStyleElement (W3C): http://www.w3.org/TR/2003/REC-DOM-Level-2-HTML-20030109/html.html#ID-16428977 Complete Test Code You can use this test code if you want to reproduce your problem: <html> <head> <style id="ID_Style"> .myStyle { color : #FF0000 ; } </style> <script> function replaceStyleViaDOM(p_strContent) { var oOld = document.getElementById("ID_Style") ; var oParent = oOld.parentNode ; oParent.removeChild(oOld) ; var oNew = document.createElement("style") ; oParent.appendChild(oNew) ; oNew.setAttribute("id", "ID_Style") ; var oText = document.createTextNode(p_strContent) ; oNew.appendChild(oText) ; } function replaceStyleViaInnerHTML(p_strContent) { document.getElementById("ID_Style").innerHTML = p_strContent ; } </script> <script> function setRedViaDOM() { replaceStyleViaDOM("\n.myStyle { color : #FF0000 ; }\n") } function setRedViaInnerHTML() { replaceStyleViaInnerHTML("\n.myStyle { color : #FF0000 ; }\n") } function setBlueViaDOM() { replaceStyleViaDOM("\n.myStyle { color : #0000FF ; }\n") } function setBlueViaInnerHTML() { replaceStyleViaInnerHTML("\n.myStyle { color : #0000FF ; }\n") } function alertStyle() { alert("*******************\n" + document.getElementById("ID_Style").innerHTML + "\n*******************") ; } </script> </head> <body> <div> <button type="button" onclick="alertStyle()">alert Style</button> <br /> <button type="button" onclick="setRedViaDOM()">set Red via DOM</button> <button type="button" onclick="setRedViaDOM()">set Red via InnerHTML</button> <br /> <button type="button" onclick="setBlueViaDOM()">set Blue via DOM</button> <button type="button" onclick="setBlueViaInnerHTML()">set Blue via InnerHTML</button> </div> <p class="myStyle"> Hello World ! </p> </body> </html> Thanks !

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  • Firewalling a Cisco ASA Split tunnel

    - by dunxd
    I have a Cisco ASA 5510 at head office, and Cisco ASA 5505 in remote offices. The remote offices are connected over a split tunnelled VPN - the ASA 5505s use "Easy VPN" Client type VPN in Network Extension Mode (NEM). I'd like to set firewall rules for the non-tunnelled traffic only. Traffic over the VPN to head office should not have any firewall rules applied. I might want to apply different firewall rules to different remote offices. All the documentation I have been able to find assumes the Client VPN is a software endpoint, and all the configuration is done at the 5510. When using a Cisco 5505 as the VPN client, is it possible to configure any firewalling at the Client end, or does it all have to come from the 5510? Are there any other issues to look out for when split-tunnelling a VPN by this method?

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  • IE6 rendering bug. Some parsed <li> elements are losing their closing tags.

    - by Jeff Fohl
    I have been working with IE6 for many years [sob], but have never seen this particular bug before, and I can't seem to find a reference to it on the Web. The problem appears to be with how IE6 is parsing the HTML of a nested list. Even though the markup is correct, IE6 somehow munges the code when it is parsed, and drops the closing tags of some of the <li> elements. For example, take the following code: <!DOCTYPE html> <head> <title>My Page</title> </head> <body> <div> <ul> <li><a href=''>Child A</a> <div> <ul> <li><a href=''>Grandchild A</a></li> </ul> </div> </li> <li><a href=''>The Child B Which Is Not A</a> <div> <ul> <li><a href=''>Grandchild B</a></li> <li><a href=''>Grandchild C</a></li> </ul> </div> </li> <li><a href=''>Deep Purple</a></li> <li><a href=''>Led Zeppelin</a></li> </ul> </div> </body> </html> Now take a look at how IE6 renders this code, after it has run it through the IE6 rendering engine: <HTML> <HEAD> <TITLE>My Page</TITLE></HEAD> <BODY> <DIV> <UL> <LI><A href="">Child A</A> <DIV> <UL> <LI><A href="">Grandchild A</A> </LI> </UL> </DIV> <LI><A href="">The Child B Which Is Not A</A> <DIV> <UL> <LI><A href="">Grandchild B</A> <LI><A href="">Grandchild C</A> </LI> </UL> </DIV> <LI><A href="">Deep Purple</A> <LI><A href="">Led Zeppelin</A> </LI> </UL> </DIV> </BODY> </HTML> Note how on some of the <li> elements there are no longer any closing tags, even though it existed in the source HTML. Does anyone have any idea what could be triggering this bug, and if it is possible to avoid it? It seems to be the source of some visual display problems in IE6. Many thanks for any advice.

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  • How to populate the span tags for all text nodes between specific self closing tags.

    - by Rachel
    I want to populate span tags for all text nodes between the self closing tags s1 and s2 having the same id. Eg. For the input: <a> <b>Some <s1 id="1" />text here</b> <c>Some <s2 id="1"/>more text <s1 id="2"/> here<c/> <d>More data</d> <e>Some <s2 id="2" />more data</e> </a> In the above input i want to enclose every text node between <s1 id="1"/> and <s2 id="1" /> with span tags. Also all the text node between <s1 id="2" /> and <s2 id="2" /> Expected Output: <a> <b>Some <span class="spanClass" id="1a">text here</span></b> <c><span class="spanClass" id="1b">Some </span>more text <span class="spanClass" id="2a"> here</span></c> <d><span class="spanClass" id="2b">More data</span></d> <e><span class="spanClass" id="2c">Some </span>more data</e> </a> I am not concened about the pattern of the id tag populated for the span as along it is unique. If the transformation of the input to the output form requires the list of ids of the s1 , s2 tag pairs say 1, 2 etc i can assume that it in place in any form if required. Hope i am clear. How can this be achieved using XSL? EDIT: The input can have any structure and not exactly the same as seen in the sample input. It can have any number of s1, s2 tag pairs but each pair will have a unique id.Adding another sample input and output pattern for more information. Input: <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>This is my title</title> </head> <body> <h1 align="center">This <s1 id="1" />is my <s2 id="1" />heading</h1> <p> Sample content <s1 id="2" />Some text here. Some content here. </p> <p> Here you <s2 id="2" />go. </p> </body> </html> Desired output: <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>This is my title</title> </head> <body> <h1 align="center">This <span id="1">is my </span>heading</h1> <p> Sample content <span id="2">Some text here. Some content here.</span> </p> <p> <span id="2">Here you </span>go. </p> </body> </html>

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  • Providing internet access to users in an Enterprise (MPLS ) Network

    - by Vivek Bernard
    Scenario I'm planning to setup a typical Head Office - Branch Office(s) Network Setup. there will be 25 branch offices in India of two will be overseas (one in US and the other in UK). All these will be connected via MPLS. Additional details: No of Concurrent users in each office is going to be 25 tranlating to 650 users The requirement is to provide "proxied" internet connectivity to the branch offices. How should I go about doing it? Plan A: Buying an internet leased line in the Head Office and distribute it through an internal proxy server to all the branches Plan B Buying separate internet lines for all the branches and setup individual proxies to all the branch offices.

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  • Module Adminhtml blocks not loading

    - by David Tay
    I was working on a Magento module and it was working fine. At some point, I was trying to enable WYSIWYG in an edit form 'content' field and suddenly, my adminhtml grid and edit blocks stopped being generated. On my system are TinyMCE and Fontis FCKEditor WYSIWYG editors extensions. I'm not sure what I did wrong but my adminhtml blocks will no longer generate. Here's a dump of all the blocks from my module's adminhtml layout: array(17) { [0]=> string(4) "root" [1]=> string(4) "head" [2]=> string(13) "head.calendar" [3]=> string(14) "global_notices" [4]=> string(6) "header" [5]=> string(4) "menu" [6]=> string(11) "breadcrumbs" [7]=> string(7) "formkey" [8]=> string(12) "js_translate" [9]=> string(4) "left" [10]=> string(7) "content" [11]=> string(8) "messages" [12]=> string(2) "js" [13]=> string(6) "footer" [14]=> string(8) "profiler" [15]=> string(15) "before_body_end" [16]=> string(7) "wysiwyg" } As you can see, the last item is "wysiwyg" but on the layout output of other magento modules, there are more blocks. For example, on MathieuF's calendar extension, these are all the layout blocks: array(26) { [0]=> string(4) "root" [1]=> string(4) "head" [2]=> string(13) "head.calendar" [3]=> string(14) "global_notices" [4]=> string(6) "header" [5]=> string(4) "menu" [6]=> string(11) "breadcrumbs" [7]=> string(7) "formkey" [8]=> string(12) "js_translate" [9]=> string(4) "left" [10]=> string(7) "content" [11]=> string(8) "messages" [12]=> string(2) "js" [13]=> string(6) "footer" [14]=> string(8) "profiler" [15]=> string(15) "before_body_end" [16]=> string(7) "wysiwyg" [17]=> string(27) "adminhtml_event.grid.child0" [18]=> string(12) "ANONYMOUS_19" [19]=> string(27) "adminhtml_event.grid.child1" [20]=> string(12) "ANONYMOUS_21" [21]=> string(27) "adminhtml_event.grid.child2" [22]=> string(20) "adminhtml_event.grid" [23]=> string(12) "ANONYMOUS_24" [24]=> string(19) "ANONYMOUS_17.child1" [25]=> string(14) "content.child0" } Does anyone have any idea what's wrong? I've already tried Alan Storm's Layout and Config Viewers and cannot find any clues as to what I did wrong. Any help would be greatly appreciated.

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  • jQuery Validation in ASP.NET

    - by Abu Hamzah
    i have a strange situation may its a easy fix or something i may be missing but here is the question. i have a asp.net form with master page and my validation works great without any problem but the problems starts when i try to hook my click event to the server side, here is what i meant: i have a form with few fields on it and if the form is empty than it should STOP submitting, otherwise allow me to execute the server side script but its not happening, even my form is in invalid state (i do get error message saying i have to enter the required fileds) but still executing my server side script. i would like to execute my server side script only if the form is in valid state. here is my code: my master page <%@ Master Language="C#" AutoEventWireup="true" CodeFile="MasterPage.master.cs" Inherits="MasterPage" %> <!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"> <head runat="server"> <title>jQuery Validation in ASP.NET Master Page</title> <script src="Scripts/jquery-1.3.2.js" type="text/javascript"></script> <script src="Scripts/jquery-1.3.2-vsdoc2.js" type="text/javascript"></script> <script src="Scripts/jquery.validate.js" type="text/javascript"></script> <asp:ContentPlaceHolder id="head" runat="server"> </asp:ContentPlaceHolder> </head> <body> <form id="form1" runat="server"> <div> <asp:ContentPlaceHolder id="ContentPlaceHolder1" runat="server"> </asp:ContentPlaceHolder> </div> </form> </body> </html> my content page: <%@ Page Title="" Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> <asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server"> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server"> <script type="text/javascript"> $(document).ready(function() { $("#aspnetForm").validate({ rules: { <%=txtName.UniqueID %>: { minlength: 2, required: true }, <%=txtEmail.UniqueID %>: { required: true, email:true } }, messages: { <%=txtName.UniqueID %>:{ required: "* Required Field *", minlength: "* Please enter atleast 2 characters *" } } }); }); </script> Name: <asp:TextBox ID="txtName" MaxLength="30" runat="server" /><br /> Email: <asp:TextBox ID="txtEmail" runat="server"></asp:TextBox><br /> <asp:Button ID="btnSubmit" runat="server" onclick="SubmitTheForm();" Text="Submit" /> </asp:Content> function SubmitTheForm() { SaveTheForm(); } function SaveTheForm() { debugger; var request = buildNewContactRequest(); ContactServiceProxy.invoke({ serviceMethod: "PostNewContact", data: { request: request }, callback: function(response) { processCompletedContactStore(response); }, error: function(xhr, errorMsg, thrown) { postErrorAndUnBlockUI(xhr, errorMsg, thrown); } }); return false; }

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