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Articles indexed in May 2010

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  • Another IE jQuery AJAX/post problem..

    - by Azzyh
    OK so i have this website, http://www.leinstein.dk. You will see "Hello World!" This is from ok.php, ive made a script that refreshes ok.php after 10 seconds. Anyways, This does not show in IE. I dont know why, and i hope you can help me out. Here's My script: function ajax_update() { cache: false /* var wrapperId = '#wtf'; */ var postFile = 'ok.php'; $.post("ok.php", function(data){ cache: false $("#wtf").html(data); }); setTimeout('ajax_update()', 10000); } And here's index.php: <? header("cache-control: no-cache"); ?> <html> <head> <link href="style.css" type="text/css" rel="stylesheet" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js"></script> <script src="ajax_framework.js" language="javascript" charset="UTF-8"></script> </head> <!-- AJAX UPDATE COMMENTS BEGIN --> <body onload="ajax_update();"> <!-- AJAX UPDATE END --> <br> <div id="wtf"></div> </body> </html> Thank you in forward..!

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  • How expensive is a context switch? Is it better to implement a manual task switch than to rely on OS

    - by Vilx-
    The title says it all. Imagine I have two (three, four, whatever) tasks that have to run in parallel. Now, the easy way to do this would be to create separate threads and forget about it. But on a plain old single-core CPU that would mean a lot of context switching - and we all know that context switching is big, bad, slow, and generally simply Evil. It should be avoided, right? On that note, if I'm writing the software from ground up anyway, I could go the extra mile and implement my own task-switching. Split each task in parts, save the state inbetween, and then switch among them within a single thread. Or, if I detect that there are multiple CPU cores, I could just give each task to a separate thread and all would be well. The second solution does have the advantage of adapting to the number of available CPU cores, but will the manual task-switch really be faster than the one in the OS core? Especially if I'm trying to make the whole thing generic with a TaskManager and an ITask, etc?

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  • How do I increase Relevance value in an advanced MySQL query?

    - by morgant
    I've got a MySQL query similar to the following: SELECT *, MATCH (`Description`) AGAINST ('+ipod +touch ' IN BOOLEAN MODE) * 8 + MATCH(`Description`) AGAINST ('ipod touch' IN BOOLEAN MODE) AS Relevance FROM products WHERE ( MATCH (`Description`) AGAINST ('+ipod +touch' IN BOOLEAN MODE) OR MATCH(`LongDescription`) AGAINST ('+ipod +touch' IN BOOLEAN MODE) ) HAVING Relevance > 1 ORDER BY Relevance DESC Now, I've made the query more advanced by also searching for UPC: SELECT *, MATCH (`Description`) AGAINST ('+ipod +touch ' IN BOOLEAN MODE) * 8 + MATCH(`Description`) AGAINST ('ipod touch' IN BOOLEAN MODE) + `UPC` = '123456789012' * 16 AS Relevance FROM products WHERE ( MATCH (`Description`) AGAINST ('+ipod +touch' IN BOOLEAN MODE) OR MATCH(`LongDescription`) AGAINST ('+ipod +touch' IN BOOLEAN MODE) ) AND `UPC` = '123456789012' HAVING Relevance > 1 ORDER BY Relevance DESC That'll return results, but the fact that I had a successful match on the UPC does not increase the value of Relevance. Can I only do that kind of calculation w/full text searches like MATCH() AGAINST()? Clarification: Okay, so my real question is, why does the following not have a Relevance = 16? SELECT `UPC`, `UPC` = '123456789012' * 16 AS Relevance FROM products WHERE `UPC` = '123456789012' HAVING Relevance > 1 ORDER BY Relevance DESC

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  • What are the best programming articles?

    - by lillq
    Part of being a good software developer is keeping current with what people are saying in the community. There are many good articles out there on the Internet about the wide subject of computer programming. What articles have you found worth your time? Please provide the article's title, author and a link if possible.

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  • How to tell what optimizations bjam is using to build boost

    - by Steve
    I'm building the boost libraries with bjam for both the intel compiler and vs2008, and I can't tell what optimizations are being passed to the compiler from bjam. For one of the compiler's gcc, I can see some optimizations in one of the bjam files, but I can't find the optimization flags for the compilers I care about. So, my questions are - Does anyone know where the default optimization flags are located? If they're declared within bjam, does anyone know how I can override them?

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  • Emperors dont come cheap

    Sorry I replied in a polite email. Maybe next year, when budgets allow for this. It was addressed to the organizer of TechEd US, which was to be in New Orleans this year. Man, I would have loved to be in new Orleans this year, but, I guess these guys only understand one language and I wont be their puppy any more. You see, they wouldnt pay for my business class flight to TechEd from Israel. Me the great emperor of unit testing?! travelling coach for 12 hours? No thanks. I have better things to...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • How do I install php-gd?

    - by user42577
    I've done phpinfo() to see if it was installed but I see no mention of the gd libraries anywhere. I ran this command (rpm -qa | grep php) and this is what I see: php-gd-4.3.9-3.18.1.swsoft php-mysql-4.3.9-3.18.1.swsoft php-pgsql-4.3.9-3.18.1.swsoft php-4.3.9-3.18.1.swsoft php-domxml-4.3.9-3.18.1.swsoft php-imap-4.3.9-3.18.1.swsoft php-mbstring-4.3.9-3.18.1.swsoft php-ncurses-4.3.9-3.18.1.swsoft php-pear-4.3.9-3.18.1.swsoft php-snmp-4.3.9-3.18.1.swsoft php-devel-4.3.9-3.18.1.swsoft php-ldap-4.3.9-3.18.1.swsoft php-odbc-4.3.9-3.18.1.swsoft php-xmlrpc-4.3.9-3.18.1.swsoft My server is a linux box with php5 installed. I also tried to run yum install php5-gd to no avail.What else should I do or check to get it installed?

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  • Adding GLUE records for Google Apps MX records

    - by Saif Bechan
    Is there a way of adding GLUE for the Google Apps MX records. I have added them all and it works fine, but in all the DNS tools I see that there is no glue sent. I know that this is not a really big problem, because the gain you get out of it is next to zero. Nevertheless I just wanted to know if it is possible and how you do it. Or if it is not possible, what is the reason for it. I have asked this question also on the Google Help Forum but with no responses so far, so I thought i'd give it a shot here.

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  • AVerMedia A309-B mini-PCI to AVerMedia A317 Mini PCI card

    - by Chris
    I got an HP pavilion hdx 16 1060ED laptop (Windows Vista) with a a DVB-T tuner card Now I would like a hybrid or analog turner card in it. According to the HP data of a more expensive variant, a AVerMedia A317 Mini PCI card installed is installed. My system has a AVerMedia A309-B mini-PCI placed in the system. my questions: 1 - is it possible to replace it with a expensive one? (AVerMedia A317 Mini PCI card) and 2 - what will this cost? 3 - I can build it myself and what can I do with the old card I like to hear from you.

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  • learn ia32 for C

    - by David Lee
    I am trying to translate the following: Action: pushl %ebp movl %esp, %eax subl $32, %esp movl $0, -8(%eax) movl $0, -4(%eax) movl -4(%eax), %eax cmpl 32(%eax), %ebp movl -4(%ebp), %eax sall $2, %ebp addl 8(%ebp), %ebp movl (%ebp), %ebp addl %ebp, -8(%eax) addl $1, -4(%eax) What is the best way to learn assembly and translating this code?

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  • scala 2.8 breakout

    - by oxbow_lakes
    In Scala 2.8, there is an object in scala.collection.package.scala: def breakOut[From, T, To](implicit b : CanBuildFrom[Nothing, T, To]) = new CanBuildFrom[From, T, To] { def apply(from: From) = b.apply() ; def apply() = b.apply() } I have been told that this results in: > import scala.collection.breakOut > val map : Map[Int,String] = List("London", "Paris").map(x => (x.length, x))(breakOut) map: Map[Int,String] = Map(6 -> London, 5 -> Paris) What is going on here? Why is breakOut being called as an argument to my List?

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  • The events go out after ajax update

    - by amirouche
    I have writed à checking/unchecking input code that works well in the fisrt loading of the page, but since I add an input via ajax then reload the inputs with the new input, the checking/unchecking event no longer works, I wonder what's the problem. thanks before

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  • jQuery | Click child, hides parent

    - by Jamie
    Hey, I have a list of using ul and li: <span class="important">Show/Hide</span> <div id="important" class="hidden"> <ul class="sub"> <li> Value one </li> <li class="child"> <img src="../img/close.png" /> </li> </ul> </div> $(".important").click(function () { $("#important").slideToggle("fast"); }); When the child (class="child") is clicked on, it should slide up the div (id="important"), however, there are other lists that have different IDs, I want the div to slide up when the child is clicked I did this: $(".child").click(function () { $(".child < div").slideUp("fast"); }); I have no idea how to make it work, I've done other combinations, can't seem to do it.

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  • Sort a 2D Points List (first by X and then Y)

    - by Mikos
    I am trying to sort a List of 2D Points first by x co-ordinate and then by y co-ordinate. I implemented the IComparer interface as follows: class PointComparer : IComparer<Point> { public int Compare(Point x, Point y) { if (x.Y != y.Y) { return x.Y - y.Y; } else { return x.X - y.X; } } } And then call my sorting as follows: pointsList.Sort(new PointComparer()); For some reason the list doesn't sort. Surely is something very simple and silly, but stuck on this for quite a while....TIA

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  • Restarting Tomcat from Tomcat itself

    - by Jack
    Hello, is it possible to restart Tomcat6 by executing a JSP? This because I would like to deploy the changes of an application by doing it remotely using the webserver. The deploy script is written in bash and it checkouts the latest version from the svn, then package it as a war, then copy it in /webapps/ while adding some libs. If I execute it from a JSP (for example by using System.execute(..) will it cause problems? The fact is that the script itself is something like: /etc/init.d/tomcat6 stop # do things /etc/init.d/tomcat6 start so I don't think it would work.. is there a way to execute a stand-alone process from inside tomcat?

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  • python and paramiko: how to check if end of ssh tunnel is still alive and reestablish if not?

    - by Christian
    Hello all, I'm trying to achieve the following: I have two hosts A and B. A establishes a remote port forwarding tunnel on B, i.e. B is the one a port is forwarded on to some where else and A is the one that sets up the tunnel. I tried the script rforward.py that ships with paramiko and it works very well so far. (I'm running rforward.py on A, which connects to B and forwards a port of B to somewhere else) However, when B is shutting down, A doesn't seem to recognize it. I'd rather like A to recognize that B is down and to try to reestablish the connection periodically in case B comes up again. Is there a way to do this? Thanks.

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  • Linux and I/O completion ports?

    - by someguy
    Using winsock, you can configure sockets or seperate I/O operations to "overlap". This means that calls to perform I/O are returned immediately, while the actual operations are completed asynchronously by separate worker threads. Winsock also provides "completion ports". From what I understand, a completion port acts as a multiplexer of handles (sockets). A handle can be demultiplexed if it isn't in the middle of an I/O operation, i.e. if all its I/O operations are completed. So, on to my question... does linux support completion ports or even asynchronous I/O for sockets?

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  • XMLHttpRequest second call always fail

    - by Michael
    I'm developing Firefox extension and inside of javascript module have function which looks like this: var ajax = Cc["@mozilla.org/xmlextras/xmlhttprequest;1"].createInstance(); ajax.open('GET', url, true); ajax.onload = function () { if (ajax.readyState == 4 && ajax.status == 200) { ... } } ajax.onerror = function (e) { ... } The second call to this function always fires onerror immediately... then after that the next call is successful. What could be wrong... is it normal?

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  • How can I migrate local users/groups from old Windows 2000 server to new Windows 2003 server?

    - by dmr83457
    On a Windows 2000 box I have setup local users and one group for the purposes of ftp sites for our clients to transfer files to their own site. We are now moving to a different server running Windows 2003. I would like to be able to transfer the users/group and related folders with permissions to the new server without setting them all back up by hand. I see tools available for migrating users to Active Directory but nothing for local to local migration. How should I go about doing this? Is there a capability already built into Windows 2000/2003 for this purpose? Thanks

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  • Sql Server 2005 Connection Unstable When Sharing Connection

    - by intermension
    When connecting to a customers hosting service via Sql Server Management Studio on an internet connection that also has other activity on it, the Sql Server connection to the hosting service is often dropped. An obvious work around to this problem is to NOT have additional traffic on the connection but it still begs the question "Why the Sql Server connection is so unstable?". If there is, for arguments sake, 100kb of bandwidth and a couple of downloads running that are being serviced at 35kB each then there is 30kB bandwidth spare capacity. If a 3rd download is started, that can be serviced at 35kB by the server, it will top out at 30kB and leave zero spare capacity. This is fine and all downloads get along nicely. However it seems that with Sql Server connections it doesn't matter if there is spare bandwidth. Sql Server regularly times out if there is any additional activity on the connection even if i have 1024kB spare bandwidth capacity. This has been experienced across different customer hosting providers over the years and so the assumption is that it's Sql Server related. Why does Sql Server (apparently) require exclusive access to the internet connection in order to maintain a connection... even if that connection has plenty of spare capacity over and above any additional activity on the connection?

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  • How to set the VirtualDocumentRoot based on the files within

    - by Chuck Vose
    I'm trying to set up Apache to use the VirtualDocumentRoot directive but my sites aren't all exactly the same. Most of the sites have a drupal folder which should be the root but there are a few really old drupal sites, a few rails sites, some django sites, etc. that want the Document root to be / or some other folder. Is there a way to set up VirtualDocumentRoot based on a conditional or is there a way to use RewriteRule/Cond to detect that / is the incorrect folder if there is a drupal folder or a public folder? Here's what I have so far: <VirtualHost *:80> # Wildcard ServerAlias, this is the default vhost if no specific vhost matches first. ServerAlias *.unicorn.devserver.com # Automatic ServerName, based on the HTTP_HOST header. UseCanonicalName Off # Automatic DocumentRoot. This uses the 4th level domain name as the document root, # for example http://bar.foo.baz.com/ would respond with /Users/vosechu/Sites/bar/drupal. VirtualDocumentRoot /Users/vosechu/Sites/%-4/drupal </VirtualHost> Thanks in advance! -Chuck

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  • arguments into instance methods in ruby

    - by aharon
    So, I'd like to be able to make a call x = MyClass.new('good morning', 'good afternoon', 'good evening', 'good night', ['hello', 'goodbye']) that would add methods to the class whose values are the values of the arguments. So now: p x.methods #> [m_greeting, a_greeting, e_greeting, n_greeting, r_greeting, ...] And p x.m_greeting #> "good morning" p x.r_greeting #> ['hello', 'goodbye'] I realize that this is sort of what instance variables are to do (and that if I wanted them immutable I could make them frozen constants) but, for reasons beyond my control, I need to make methods instead. Thanks!

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