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• Fastest Algorithm to scale down 32Bit RGB IMAGE.

  - by Sunny

  which algorithm to use to scale down 32Bit RGB IMAGE to custom resolution? Algorithm should average pixels. for example If I have 100x100 image and I want new Image of size 20x50. Avg of first five pixels of first source row will give first pixel of dest, And avg of first two pixels of first source column will give first dest column pixel. Currently what I do is first scale down in X resolution, and after that I scale down in Y resolution. I need one temp buffer in this method. Is there any optimized method that you know?

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• Feeding a Drill Down Menu with categories, subcategories and subSubcategories from a database

  - by Hassan

  Hi everyone, I have a Drill Down menu and I want to have it gets its elements from a database, I am using php and MySQL and the table (categories) looks like this : http://yfrog.com/jctablehsj I can't figure out how I can extract these information in a way I could put it inside the Drill Down Menu ! I found the recursive method (with LEFT JOINs) and the nested method which I barely understood and again I couldn't apply it to the Drill Down Menu. I found that some people found out a solution with left join and group by but couldn't understand or copy their example ! I would be more than gratefull if you could give me the extact of the query. Thanks a lot for your hard work, Hassan

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• Adding Item to DataBound Drop Down List

  - by Stephen

  Yes, I have read most of the topics here, but I can't find an answer that works. I have Three drop-down lists. The first is databound to grab distinct experiment names. The user selects, page posts back, and the second drop-down menu displays distinct time points. This is where I need help. I need to add an item to THAT drop-down list whose ID, DataTextField, DataValueField are all TimePt. Seems simple, but I can't get it to work. protected void Page_Load(object sender, EventArgs e) { if (Page.IsPostBack) { TimePt.DataSource = TimePTDD; TimePt.DataValueField = "TimePt"; TimePt.DataTextField = "TimePt"; TimePt.DataBind(); TimePt.Items.Insert(0, new ListItem("--Select---", "0")); TimePt.SelectedIndex = 0; } } I'm missing sometthing.

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• Custom drop down

  - by Rob

  I'm trying to create a custom drop down and using the code below it works pretty well - only one problem is if i have more than one drop down, all the links will only activate the first drop down. Any ideas on how I would fix that? (and yes I know about Suckerfish I just need to get this to work) function toggle() { var ele = document.getElementById("dropdown-items"); var text = document.getElementById("dropdown-menu"); if(ele.style.display == "block") { ele.style.display = "none"; } else { ele.style.display = "block"; } }

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• Pull down UIToolbar above UIWebView inside UIScrollView

  - by Nick VanderPyle

  I'd like to display a toolbar above a UIWebView but hide the toolbar until the person "pulls it down". The same functionality can be seen in Safari on the iPhone. When the page loads, the toolbar containing the address is hidden. You must pull it down. In Safari it's possible to scroll up and eventually see the toolbar or scroll down through the page contents. I've tried placing a UIToolbar and UIWebView inside a UIScrollView but it didn't work. I've tried setting the UIScrollView to the size of the toolbar and webview combined, but that didn't work. - (void)viewDidLoad{ CGSize size = CGSizeMake(webView.frame.size.width, toolBar.frame.size.height + webView.frame.size.height); [scrollView setContentSize:size]; } How should I go about doing this?

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• Move entire line up and down in Vim

  - by guy.incognito

  In Notepad++, I can use ctrl + shift + up/down to move the current line up and down. Is there a similar command to this in Vim? I have looked through endless guides, but have found nothing. If there isn't, how could I bind the action to that key combination? Edit: Mykola's answer works for all lines, apart from those at the beginning and end of the buffer. Moving the first line up or the bottom line down deletes the line, and when moving the bottom line up it jumps two spaces initially, like a pawn! Can anyone offer any refinements?

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• Mapping a drop-down menu over an image

  - by Pieter

  I have a menu bar that is rotated slightly. Here are two buttons as an example: As a result, I can't use regular HTML to handle this. I need to use a <map> to put hyperlinks over the menu parts. (Or am I missing a killer CSS feature I don't know about?) I want to map drop-down menus to these buttons. This looks like a nice way to implement drop-down menus: http://javascript-array.com/scripts/simple_drop_down_menu/ However, this does not work on <map>s, I believe. Or am I wrong? Is there a different approach I can take to constructing drop-down menus for a menu bar that is not aligned horizontally?

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• PHP drop down which each are dependable

  - by user147685

  Hi all, I have this problems. using html and php. May I know how to do this. I have 2 drop down, eg A and B. Drop down B is depend to the drop down A. Example, A have these options which will be called from dbase(no prob with this, tq) (Jack, Carol), and B wil have options depend on A: if select Jack(T1, T2, T3), if select carol(T1,T2,T3,T4,T5). Here are the sample interface. Can someone help me with this? thank you.

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• HTML, PHP No data in drop down box

  - by Makinitez21

  Hey, I am trying to figure out why a website's drop down box will not show any options. The data file for this drop down box comes from a microsoft access .mde file. The file is present and after the last update was working fine. Some changes happened to the site, i.e. text got added along with some photos. Im not saying this was when the drop down box went bad, but when it was discovered these were the only changes made. The data file seems fine as it is worked with everyday. Can anyone point me in the right direction as to where to begin looking for the bug? For a better idea of what I am talking about, check out the Site http://yogaalliance.org/teacher_search.cfm and try selecting a country. Thank you in advance

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• Auto scroll down iframe

  - by tree-hacker

  How can I get an iframe such that when it loads up, it loads up with the page inside scrolled down by a fixed amount (say 100px)? I have so far: <iframe src="http://news.bbc.co.uk/1/hi/uk/7459669.stm" scrolling="no" width=500px height=500px></iframe> but it loads up with the bbc.co.uk page inside at the top left when I actually want it to load up scrolled part way down (that is the page inside the iframe scrolled down, not the page containing the iframe). Anyone know how to do this?

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• WPF Scroll Button (Hold down functionality)

  - by Kyle

  Hey all, I have a listbox of items that I am using, and I have a button I made which scrolls up and down, but the only problem is, that you have to click every single time you want to scroll up and down a bit. I am looking for the functionality to simply hold down on the button and have it scroll.. is this possible in WPF? Perhaps I am overlooking something? I searched the internet and haven't found anything like it. Perhaps someone has done this before? Any input would be appreciated, thanks!

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• Command line tool (PDF Workflow) in OSX that detects if key is down

  - by kroko

  Hello! I'm writing a OSX PDF Workflow in ObjC and C. A single executable ("UNIX Tool" as named in the Apple reference), that reads in the spooled PDF file, does some parsing. I'd like to give more functionality by enabling a key-down event handling, meaning - when user opens print dialog in an application - and chooses to left-mouse-click on the custom made pdf workflow to run it - depending on if a keyboard key is down (i.e. option key, but "any key down" would be enough for me) when running that workflow - a decision is made in the code. I have read NSEvent and Carbon Event Manager reference and it seems that in this case (a plain unix executable + not run as root) it's not possible. Or is it? Many thanks in advance, Kroko

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• Drop down list population fails after validation fails

  - by sarah

  Hi All, I am polpulating data in drop down reading from request scope,i am doing validaiton of fe w field after submission i wont get data in drop down i am using struts and the corresponding form bean defn is like <action path="/userProcess" name="userForm" type="com.actions.UserManagementAction" parameter="method" input="/views/AddUsers.jsp" scope="request" > <forward name="success" path="/views/User_Management.jsp" /> </action> and the drop down listing is <select name="roleName"> <c:forEach items="${roleNames}" var="role"> <option value="${role}">${role}</option> </c:forEach> </select> how should i handle this ?

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• Get drop down selection from GridView on button press

  - by Chris Stewart

  I have an ASP.NET GridView that has four columns. The first three are typical BoundField elements bound to a DataTable. The forth is a TemplateField element that I create a DropDownList in on the OnRowCreated event for the GridView. What I'm attempting to do is walk down the data source for the GridView when a button is pressed. I really just need to get the values for columns one and four of each row. The first three columns have data as expected but the forth is displaying as empty. Is this because it wasn't a part of the DataTable originally? Is there any way to get the value for each drop down as I've described it, or will I need to rework this so each drop down list is a part of the DataTable?

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• load data only when slide down with jquery

  - by hd

  I have a link that when user clicks on it some data loaded into a div. I want to display waiting message to user until the data fetch completely from server and then show it to user. I also want to call the data url happen only when the result box is going down(slide down) not in both of slide down and slide up events to reduce load on server. my code is here but i don't know how implement second part into it: $(document).ready(function() { $("#prereq").hide(); $("#prereqlink").click(function() { $("#prereq").html("please wait ..."); $("#prereq").slideToggle("slow"); $.ajax({ url:"referee.php", success:function(data) { $("#prereq").html(data); } }); }); }); would you help me??

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• lighttpd: Backend is overloaded + fcgi-server re-enabled + all handlers are down

  - by AbuZubair

  We have a standard lighttpd deployment with PHP-CGI and our error logs are flooding with the following. This is causing a huge problem because we keep returning 500's to our clients: 2012-10-14 14:28:38: (mod_fastcgi.c.3001) backend is overloaded; we'll disable it for 1 seconds and send the request to another backend instead: reconnects: 0 load: 36 2012-10-14 14:28:38: (mod_fastcgi.c.2764) fcgi-server re-enabled: 0 /tmp/php-7735.socket 2012-10-14 14:28:39: (mod_fastcgi.c.2764) fcgi-server re-enabled: 0 /tmp/php-7735.socket 2012-10-14 14:28:40: (mod_fastcgi.c.3001) backend is overloaded; we'll disable it for 1 seconds and send the request to another backend instead: reconnects: 0 load: 37 2012-10-14 14:28:40: (mod_fastcgi.c.2764) fcgi-server re-enabled: 0 /tmp/php-7735.socket 2012-10-14 14:28:41: (mod_fastcgi.c.3001) backend is overloaded; we'll disable it for 1 seconds and send the request to another backend instead: reconnects: 0 load: 57 2012-10-14 14:28:41: (mod_fastcgi.c.3001) backend is overloaded; we'll disable it for 1 seconds and send the request to another backend instead: reconnects: 0 load: 57 2012-10-14 14:28:42: (mod_fastcgi.c.3597) all handlers for /index.php? on .php are down. Does anyone have any clue as to what is going on? We restarted all php and lighttpd related processes and that didn't fix the problem. We ended up rebooting the whole box and now its gone away, although we fear it may come back later.... In general our deployment has been doing fine for a long time and this is the first time this has happened.

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• Making the iPhone work with stripped down Windows XP

  - by Gabriel

  Hi, this is my first time posting here and I have a really specific question. I have an ASUS eee 901 running Windows XP Home. I had everything working well, but then I decided to improve performance by moving Windows to the smaller but faster internal SSD. I used Nlite to strip down Windows, following the instructions here: http://wiki.eeeuser.com/howto:nlitexp I now have a very lightweight installation of XP home with SP3 and all the current updates. Almost everything is working really well. I have installed iTunes and I CAN sync with no problems. However, each time I plug in my iPhone 3GS (latest firmware), Windows tries and fails to install drivers. The Found New Hardware Wizard launches, but nothing I do will make it complete successfully, with the result that the iphone does not show up in Windows as removable storage, or as a camera. When I launch the Camera and Scanner Wizard, it shows only my webcam, not the iphone. I have verified that I have the following files in place: Windows\System32\ptpusb.dll (regsvr32 successful) Windows\System32\ptpusd.dll (entry point not found, can not be registered) Windows\System32\usbaaplrc.dll (entry point not found, can not be registered) Windows\System32\drivers\usbaapl.sys Windows\System32\drivers\usbscan.sys Windows\System32\drivers\usbstor.sys Does anyone know if some other file is required or if there's some other element preventing this from working? Edit (From posted answer) I did select Cameras & Camcorders, and my webcam is working fine for video & still capture.

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• MS SQL Server slows down over time?

  - by Dave Holland

  Have any of you experienced the following, and have you found a solution: A large part of our website's back-end is MS SQL Server 2005. Every week or two weeks the site begins running slower - and I see queries taking longer and longer to complete in SQL. I have a query that I like to use: USE master select text,wait_time,blocking_session_id AS "Block", percent_complete, * from sys.dm_exec_requests CROSS APPLY sys.dm_exec_sql_text(sql_handle) AS s2 order by start_time asc Which is fairly useful... it gives a snapshot of everything that's running right at that moment against your SQL server. What's nice is that even if your CPU is pegged at 100% for some reason and Activity Monitor is refusing to load (I'm sure some of you have been there) this query still returns and you can see what query is killing your DB. When I run this, or Activity Monitor during the times that SQL has begun to slow down I don't see any specific queries causing the issue - they are ALL running slower across the board. If I restart the MS SQL Service then everything is fine, it speeds right up - for a week or two until it happens again. Nothing that I can think of has changed, but this just started a few months ago... Ideas? --Added Please note that when this database slowdown happens it doesn't matter if we are getting 100K page views an hour (busier time of day) or 10K page views an hour (slow time) the queries all take a longer time to complete than normal. The server isn't really under stress - the CPU isn't high, the disk usage doesn't seem to be out of control... it feels like index fragmentation or something of the sort but that doesn't seem to be the case. As far as pasting results of the query I pasted above I really can't do that. The Query above lists the login of the user performing the task, the entire query, etc etc.. and I'd really not like to hand out the names of my databases, tables, columns and the logins online :)... I can tell you that the queries running at that time are normal, standard queries for our site that run all the time, nothing out of the norm.

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• o2cb thinks ocfs2 cluster is still online, and refuses to shut down

  - by Kendall

  I have a handful of OpenSuSE 11.2 servers that utilize OCFS2 volumes. I've noticed that o2cb can't figure out when the OCFS2 cluster is actually mounted. For example, when I try to shutdown o2cb, after stopping OCSF2, o2cb refuses to shutdown because it thinks OCFS2 is still up! After stopping OCFS2 I try to stop o2cb... hamguy:/dev/disk/by-label # /etc/init.d/o2cb stop Stopping O2CB cluster ocfs2: Failed Unable to stop cluster as heartbeat region still active So I check the status... hamguy:/dev/disk/by-label # /etc/init.d/o2cb status Driver for "configfs": Loaded Filesystem "configfs": Mounted Stack glue driver: Loaded Stack plugin "o2cb": Loaded Driver for "ocfs2_dlmfs": Loaded Filesystem "ocfs2_dlmfs": Mounted Checking O2CB cluster ocfs2: Online Heartbeat dead threshold = 31 Network idle timeout: 30000 Network keepalive delay: 2000 Network reconnect delay: 2000 Checking O2CB heartbeat: Active And double check OCFS2... hamguy:/dev/disk/by-label # /etc/init.d/ocfs2 status Configured OCFS2 mountpoints: /u/conf /u/logs /u/backup /u/client /u/data /u/mdata OCFS2 is clearly down, while o2cb clearly thinks otherwise. The versions of OCFS2 and o2cb are... kendall@hamguy:~> rpm -qa |grep ocfs2 ocfs2console-1.4.1-25.6.x86_64 ocfs2-tools-o2cb-1.4.1-25.6.x86_64 ocfs2-tools-1.4.1-25.6.x86_64 kendall@hamguy:~> rpm -qa |grep o2cb ocfs2-tools-o2cb-1.4.1-25.6.x86_64 What causes this, and is there a way around it? If I try to reboot the machine, it will just sit there forever until your physically power cycle it. That obviously is a bit of a problem. Any insight is appreciated, thank you. Kendall

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• apache with php fastcgi keeps going down

  - by Josh Nankin

  I have an apache2 server configured with MPM worker and php fast cgi. Lately the apache logs have been telling me that MaxClients is being reached frequently, even though it's already pretty high. My server is now constantly going down, and I see a bunch of lines like this in the log: [Sun Mar 06 04:25:40 2011] [error] [client 50.16.83.115] FastCGI: comm with (dynamic) server "/var/local/fcgi/php-cgi-wrapper.fcgi" aborted: (first read) idle timeout (20 sec) [Sun Mar 06 04:25:40 2011] [error] [client 50.16.83.115] FastCGI: incomplete headers (0 bytes) received from server "/var/local/fcgi/php-cgi-wrapper.fcgi" I can see that my php-cgi processes are pretty large (about 70mb on average). Here's my apache configuration for MPM worker: KeepAlive ON KeepAliveTimeout 2 <IfModule mpm_worker_module> StartServers 5 MinSpareThreads 10 MaxSpareThreads 10 ThreadLimit 64 ThreadsPerChild 10 MaxClients 20 MaxRequestsPerChild 2000 </IfModule> Heres my fastcgi apache configuration: <IfModule mod_fastcgi.c> # One shared PHP-managed fastcgi for all sites Alias /fcgi /var/local/fcgi # IMPORTANT: without this we get more than one instance # of our wrapper, which itself spawns 20 PHP processes, so # that would be Bad (tm) FastCgiConfig -idle-timeout 20 -maxClassProcesses 1 <Directory /var/local/fcgi> # Use the + so we don't clobber other options that # may be needed. You might want FollowSymLinks here Options +ExecCGI </Directory> AddType application/x-httpd-php5 .php AddHandler fastcgi-script .fcgi Action application/x-httpd-php5 /fcgi/php-cgi-wrapper.fcgi </IfModule> Here's my fastcgi wrapper: #!/bin/sh PHPRC="/etc/php5/apache2" export PHPRC PHP_FCGI_CHILDREN=8 export PHP_FCGI_CHILDREN exec /usr/bin/php-cgi Any help would be very very much appreciated!

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• Why are SMART error rates going down?

  - by Jeff Shattock

  I have a hard drive that's part of a Linux software raid5 array. SMART has reported that its multi_zone_error_rate was 0, then 1, then 3. So I figured I better start backing up more frequently and prepare to replace the drive. Now, today, the multi_zone_error_rate of that very same drive is back down to 1. It seems that 2 errors unhappened while I wasn't looking. I've also seen simliar behaviour by inspecting the syslog on the server. Jun 7 21:01:17 FS1 smartd[25593]: Device: /dev/sdc, SMART Usage Attribute: 7 Seek_Error_Rate changed from 200 to 100 Jun 7 21:01:17 FS1 smartd[25593]: Device: /dev/sde, SMART Usage Attribute: 7 Seek_Error_Rate changed from 200 to 100 Jun 7 21:01:18 FS1 smartd[25593]: Device: /dev/sdg, SMART Usage Attribute: 7 Seek_Error_Rate changed from 200 to 100 Jun 8 02:31:18 FS1 smartd[25593]: Device: /dev/sdg, SMART Usage Attribute: 7 Seek_Error_Rate changed from 100 to 200 Jun 8 03:01:17 FS1 smartd[25593]: Device: /dev/sdc, SMART Usage Attribute: 7 Seek_Error_Rate changed from 100 to 200 Jun 8 03:01:17 FS1 smartd[25593]: Device: /dev/sde, SMART Usage Attribute: 7 Seek_Error_Rate changed from 100 to 200 These are raw values, not the human-useful values that smartctl -a produces, but the behaviour is similar: error rates changing, then undoing the change. None of these are the drive that had the multi_zone weirdness. I haven't seen any problems from the RAID; its most recent scrub ( < 24 hours ago) came back totally clean. The only thing I can think of is that the SMART reporting circuitry on the drive isn't working properly all the time. The cables are in tight on the drive and board. What's going on here?

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• Tracking down the cause of a web service fault running in IIS

  - by BG100

  I have built a web service in Visual Studio 2008, and deployed it on IIS 7 running on Windows Server 2008 R2. It has been extensively tested, handles all errors gracefully and logs any uncaught errors to a file using log4net. The system normally runs perfectly, but occasionally (2 or 3 times a day) a fault occurs and screws up the application which needs an iisreset to get it working again. When the fault occurs I get some random errors that are caught by my catch-all error log, such as: Value cannot be null. Could not convert from type 'System.Boolean' to type 'System.DateTime'. Sequence contains no elements These errors are raised on every request until I manually do an iisreset, but there is no sight of them when the system is running normally. The web service is a stateless request-response application. Nothing is stored in the session. It could be load related, but I doubt it as there are only around 30 or 40 requests per minute. This is proving very tricky to track down. I can't work out what is putting IIS into this bad state, and why it needs an iisreset to get it working again. Nothing is reported in the event log. Can anyone suggest how to enable more extensive logging that might catch this fault? Also, does anyone know what might be causing the problem?

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• Is .htaccess slowing down my dedicated server?

  - by David Robles

  First of all, I consider myself more a programmer than a servers guy. I have a website where I receive about 3,000 visits per day, which I think is a lot less than the max capacity for a dedicated server. However, I've noticed that the connection to the website is pretty slow, e.g., to load images, to connect to it via SSH, etc. I configured .httaccess recently to avoid hotlinking to images in my server (i.e. .jpg, .gif and .png), and I was wondering if that could be slowing down my website. This is the configuration that I have: # BEGIN WordPress <IfModule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteEngine on RewriteCond %{HTTP_REFERER} !^$ RewriteCond %{HTTP_REFERER} !^http://www.mysite.com/.*$ [NC] RewriteCond %{HTTP_REFERER} !^http://www.mysite.com$ [NC] RewriteRule .*\.(jpg|jpeg|gif|png|bmp|swf)$ http://www.google.com/ [R,NC] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] </IfModule> # END WordPress I found some code to do that in google, and I just copied to .htacces since I'm not an expert in apache. It works, but I don't know if that is the best way to do it. How can I see if that is the reason why the server is slow? Are there any tools to monitor it? What would you do guys? Thanks in advance!

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• Netbook (Samsung N220) on Ubuntu 10.04 slows down WiFi for other computers

  - by Joachim

  I encountered a really odd problem with my new netbook. I am running Ubuntu 10.04 on a Samsung N220 Mito. So far everything worked fine. Now I tried the machine for the first time in our work group where we have a wifi (with internet access) for all laptops. The wifi is controlled by a computer running Suse 9.3 which provides a DHCP server and imposes a firewall. At the moment there is only a macbook in the wifi, where no problems with the internet or wifi connection are encountered. Now coming to my actual problem: In addition to the macbook i connect the Samsung N220 to the Wifi. Problem: My download speed is for some reason limited to 70KB/s max. This is neither a limitation of the server/website i browse on, nor a configuration of the netbook: at home i have 500KB/s download speeds. Furthermore, it is not a default limitation for "untrusted" or "new machines" in the wifi, as for instance other new laptops get full speed internet with our wifi. Problem: Once the Samsung N220 is generating traffic in the wifi, the wifi is slowed down dramatically for all other machines: I run a ping to the router from the macbook. The ping times with the N220 ideling are 2-6ms. When I start downloading or browsing in the web with the N220 the ping speed drops to 800ms. Vice versa, when the macbook is generating the traffic the ping of the N220 to the rooter stays constant at around 2-6ms. So clearly, it is some problem originating from my netbook or maybe its treatment in the wifi. Thanks for any help

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• Nagios check_host_alive and check_ping not showing host as down

  - by Kyle

  I am using the check_host_alive command to send 5 packets every minute to all my routers at remote locations. I noticed today I received a notification from The AT&T Global Client Support Center that a router was down (which can take 5-30 minutes to send these notices out) and never received a notice from Nagios. I went onto Nagios and it is was showing the host as alive with a latency of 0ms. This tells me it is seeing the automated response from my router in the data center that, "TTL expired in transit" as a reply from the remote router. Is there anyway for me to tell nagios to check where the reply is comming from? I feel like other people have to of had this issue... I tested it with the check_ping command and it produced the same results. I have the command defined has %hostname% and the proper IP in the host definition, and it works fine for telling me the latency is high. Any ideas are welcome, I have already exercised my Google skills with no results. EDIT: root@IM-UBTU:/# /usr/local/nagios/libexec/check_ping -H 192.168.250.1 -w 100.0,10% -c 200.0,20% -vvv CMD: /bin/ping -n -U -w 10 -c 5 192.168.250.1 Output: PING 192.168.250.1 (192.168.250.1) 56(84) bytes of data. Output: From 10.69.10.2 icmp_seq=1 Time to live exceeded It knows something is wrong why doesn't it give me a warning?

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