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• Queue access to the database to avoid multiple cache items

  - by MikeJ

  I have a music related ASP.NET web site which caches a lot of static information from the database on the first request. Sometimes, the application is reset and cache is cleared while the application is on heavy load and then all http requests go to the database to retrieve that static data and cache it for other requests. How can I ensure that only one request go to the database and cache the results, so that other request simply read that info from cache and not needlessly retrieve the same info over and over again. Can I use thread locking? For example, can I do something like lock(this) { db access here }?

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• tutorials/books to create a plugin/module/library?

  - by fayer

  i wonder if there are tutorials/books explaining how you create a library/plugin/module for other to implement? libraries/frameworks like solr, doctrine, codeigniter etc. cause it seems that they follow the same pattern. having one "bootstrap" file to load configurations, other classes and so on. i aim to understand the basics, so i can create a such library. cause at the moment i want to code an address book that other can use. just include a bootstrap file and they are ready to use my classes (like Doctrine). recommendations of sources to learn these things of stuff? you experienced guys, how did you learn it? thanks.

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• How to setup Expression Blend 3 add-in window at certain position ?

  - by j23tom..pl

  For example in Sketchflow add-in there is ApplicationFlowPane (derrived from PrototypingPane) which registers itself using IWindowService like this: service.RegisterPalette(this.PaletteRegistryName, this, this.Caption, this.KeyBinding); But i can't see where it is defined that it is docked on bottom pane. Before someone replies that it's at: %AppData%\Microsoft\Expression\Blend3\Workspaces No it's not there because those files do not exists at first run. The question is how can i put my window at certain position with Expression Blend 3 plug-in api ? update 1: It seems that to achive what i want i have to change design.xaml (where workspaces are defined) which is loaded from satellite assembly Microsoft.Expression.Blend.resources.dll (method load in class FrameworkPackage in Microsoft.Expression.Blend.dll). But since this dll is strongly named i can't change it. So now the question is. Is there any other way I can change Design Workspace at runtime ?

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• Using Python read specific (column, row) values from a txt file

  - by user2955708

  I would like to read values from a text file until that is a float value. Lets say I have the following file: 14:53:55 Load 300 Speed 200 Distance,m Fz Fx Speed 0.0000 249 4 6.22 0.0002 247 33 16.29 0.0004 246 49 21.02 0.2492 240 115 26.97 0.2494 241 112 21.78 0.2496 240 109 13.09 0.2498 169 79 0.27 Distance,m Fz Fx Speed 0.0000 249 4 7.22 0.0002 247 33 1.29 0.0004 246 49 271.02 0.2492 240 115 26.97 0.2494 241 112 215.78 0.2496 240 109 13.09 0.2498 169 79 0.27 And I need only the values under the first Distance column. So something like skip the first few rows, then read values from the first column while it is float. Thanks your help in advance

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• Two view App with root template view

  - by Tieman

  Hi I was wanted to do Application witch have a root template view with a nice logo on top or something adn load other views just below (here is what I have right now: Test App ) But I have a little problem. If I'll remove a comment in file TestAppDelegate.m on line 58 //[currentView release]; Application will crash with bunch of errors when I try to switch views. But if I comment this line Project analyzer is telling me that I have a potential leak with currentView variable. Can somebody spare some time and see in that code what I did wrong?

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• Care to be taken when serving static content (JS, CSS, Media) from different domain?

  - by Aahan Krish

  Let me try to explain by example. Say website is hosted at example.com (NOT www.example.com). In order to serve static content cookie-free, I've chosen to use a different domain example-static.com. Now, lets consider that my static content is currently served like this: http://example.com/js/script.js http://example.com/css/style.css http://example.com/media/image.jpg ** Now I create a CNAME record aliasing example-static.com to my main domain i.e. example.com so that the static content is served as such: http://example-static.com/js/script.js http://example-static.com/css/style.css http://example-static.com/media/image.jpg ** Is that all I have to do? Will all browsers execute JavaScript files and load web fonts without any security concerns? OR should I be using some .htaccess rules to modify header information and the like? PS: It would be great if you can provide what rules should be added, if need be.

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• Paging a UIScrollView with a large PDF

  - by Fousa

  I try to create a simple UIScrollView with paging. And I want to be able to scroll through a large PDF document, but this gives me some problems... I tried the following options: Convert all the PDF pages to UIImages at startup, this works, but is very slow on start Manually drawing the PDF page in the drawRect, but yet again this was slow... And I prefer not to load everything at startup but to do it during the usage. Did anyone did this recently? Can't seem to find a nice example project. Thnx! Jelle

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• How to get Field Labels from PIMItem - Blackberry

  - by Taha

  How can we get Field Labels from PIMItem. The following code is with PIMList String label = pimList.getAttributeLabel(blackBerryContact.getAttributes(Contact.TEL, i)); But i have PIMItem. There is a method PIMItem.getPIMList() which returns null for me in the code below. THE API at http://www.blackberry.com/developers/docs/5.0.0api/index.html says "getPIMList() Gets the PIMList associated with this item." Below is sample code that i am trying to achive - // Load the address Book and allow the user to select a contact BlackBerryContactList contactList = (BlackBerryContactList) PIM.getInstance().openPIMList(PIM.CONTACT_LIST,PIM.READ_ONLY); PIMItem userSelectedContact = contactList.choose(); // Now get the Field labels for contact numbers for userSelectedContact

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• Why is iphone Simulator not rendering HTML5 page correctly?

  - by user364978

  hello all, I have a page I am developing in .net using HTML5 intended for a WebView in an iphone App. The page looks just fine in Safari. When I load it in the iphone Simulator it is rendering as plain text, no styles or js loading. I thought it might be an issue with .net, but seeing as it works in Safari i am stumped. When I use the XHTML doctype it works just fine in the Simulator. Any ideas why this is occurring and what the fix may be? Thanks!

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• How to create and show views on command request?

  - by user365575

  Hi, I've started using mvvm-light toolkit , and new to WPF. My question is: I want to create an pplication where the main window includes a grid with 2 columns 1 col command and col2 will display views when each command will be pressed. i want the views to be created on command and colsed from it's own view. I've tried to figure out how to do it but with no success. I don't know how to write this kind of funconality using the mvvm light. I just know how to create main window with mainview and another view creted already on load. Please help me out.. I'm using 2008 WPF3.5 Shirly. Make me happy today.. i've just started the week!!!

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• jQuery function in .click() etc

  - by Martind

  Hi all. So normally, I do it like this: $('#selectRoom a').click( function(e) { e.preventDefault(); // To prevent the default behavior (following the link or adding # to URL) // Do some function specific logic here }); However, I would like to do it like this, to clean things up (and be able to reuse): $('#selectRoom a').click( selectRoom ); function selectRoom () { e.preventDefault(); // To prevent the default behavior (following the link or adding # to URL) // Do some function specific logic here } The problem is, i cant pass the "e" event-handler to the function, then the selectRoom() function is called on load. i.e: $('#selectRoom a').click( selectRoom(e) ); Can I fix this somehow?

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• Fetching content from Website on another Server

  - by benny

  Hi everyone. What i basically want to do is to get content from a website and load it into a div of another website. This should be no problem so far. The problem is, that the content that should be fetched is located on a different server and i have no source access to it. I'd prefer a solution using JavaScript of jQuery. Can i use a .htacces redirect to fetch the content from a remote server with client-side (js) techniques? I will also go with other solutions though. Thanks a lot in advance!

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• Check checkbox in an asax page through javacsript

  - by Khushi

  I have a default page which loads different controls on pageload according to the querystring. I have a control which creates checkbox list (inside div_A) on load and get checkbox checked through database, then i click Continue, div_A get invisible with all the checked checkbox id in hidden field and div_B is visible true. On Go Back click, div_B is visible false and div_A get visible true and following javascript is fired to check the selected checkbox, but it does not work Javascript : function goBack() { var SIds = document.getElementById("<%=hdv_Data.ClientID %>").value; // hdv_Data is the hidden field var Ids_Arr = new Array(); Ids_Arr = SIds.split(','); for (j = 0; j < Ids_Arr.length; j++) { if(Ids_Arr[j] != 0) { alert(Ids_Arr[j]); // works till here, gets correct values in array var chk = document.getElementById(Ids_Arr[j]); alert(chk); chk.checked = true; } } }

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• What advantages does Windows Embedded Enterprise give you?

  - by Max Schmeling

  My company has built a machine that measures wedge and roundness of lenses by reading and interacting with very precise indicators, motors, and a switch panel. The interface for the machine is a WPF application and it runs on Windows Vista on a normal PC bought from the store. I've never worked with Windows Embedded, but it sounds to me like it's intended for this type of system. My question is, what does it buy me? If I were to run this on Windows Embedded Enterprise (Vista) what benefits do I get? Do I get more control of the load, login, and all that? Can I make it more seamless where it doesn't really feel just like a normal application running full screen? Is it something I should look into more?

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• Just an experiment changing the application data path

  - by Arthur

  When I change the Appication Data path in windows xp registry to a network folder I get this error message on the next system startup: "windows cannot load the user's profile but has logged you with the default profile system" The registry keys are: "[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]" "[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders]" under the names "AppData" and "Local AppData" I dont care if "Windows logins you with the default profile system" but is there a way to disable that message, or change the message timeout form 30 seconds to 0?,or maybe create an script that changes the Application Data path every system startup? P.S. The computer with the shared folder is always on.

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• SVG Using Adobe in IE doesn't work when loading page, but saving the page and then loading it works.

  - by Nick

  So I'm trying to get a SVG document to load in IE. I can see it fine, but all calls to .getSVGDocument() fail, the svg onload="onload()" function never gets called and the right-click Adobe SVG Viewer context menu doesn't show up when right-clicking on the svg. It seems as though I'm managing to crash the adobe SVG viewer or something before it is able to call the onload function but after it has drawn the SVG document. As a test I saved the html page to my hard drive and loaded it up and walla - it works! Right-click, onload, and .getSVGDocument() all work. Very curious. For some reason getting the page from the server makes the adobe plugin crap out but loading up static HTML is fine. Any thoughts?

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• Retrieving data from an encrypted text file?

  - by user

  Let's say I have a text file contains my data. data : ab bc de - encrypted data on text file : ba cb ed I want to find bc from text file, so I have to decrypt the text file with this code : SL:=TStringList.create; SL.LoadFromFile(textfile) SLtemp:=TStringList.create; for I := 0 to SL.Count - 1 do SLtemp.Add(ReverseString(SL[i])); //decrypt SL.Free; for I := 0 to SLtemp.Count - 1 do if SLtemp[i] = 'bc' then begin showmessage('found'); break; end; SLtemp.Free; I think my way is wasting resources. I have to load whole file to memory and decrypt them. I need some suggestions here to find quickly a specific line from an encrypted text. Thanks.

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• How do you save a Neural Network to file using Ruby's ai4r gem?

  - by Jaime Bellmyer

  I'm using ruby's ai4r gem, building a neural network. Version 1.1 of the gem allowed me to simply do a Marshal.dump(network) to a file, and I could load the network back up whenever I wanted. With version 1.9 a couple years later, I'm no longer able to do this. It generates this error when I try: no marshal_dump is defined for class Proc I know the reason for the error - Marshal can't handle procs in an object. Fair enough. So is there something built in to ai4r? I've been searching with no luck. I can't imagine any practical use for a neural network you have to rebuild from scratch every time you want to use it.

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• size of an image

  - by Mike

  From times to times I have to know the width and height of images. I am using the following code: UIImage *imageU = [UIImage imageWithContentsOfFile:[[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"myImage.png"]]; CGFloat imageW = CGImageGetWidth(imageU.CGImage); CGFloat imageH = CGImageGetHeight(imageU.CGImage); My question is that if it is there any other way to know the width and height of an image, in pixels, without having to load the image on a variable, that's probably consuming memory. Can the dimensions be read from the file directly without loading the whole image? thanks.

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• jquery animating different img widths

  - by romeozor

  Hi there, I've been searching for an answer for a long time with no avail, so it's time to ask. I'm trying to use .animate() to change the size of an image once clicked. The first state of the image would be a thumbnail size, which would animate to the image's original size, then to a thumbnail again. The problem is, not all the images have the same "original" size so I need a way to tell one generic function to switch to the current image's original size. This is my current code which loads on $(window).load: $('img[class=resize]').click(function (){ if ($(this).width() != 150) { $(this).animate({width: '150px'}, 400); } else { $(this).animate({width: ''}, 400); } }); Now this obviously doesn't work the way I want it, because .animate() thinks when I say width: '' I want to make the width = 0. Any suggestions how I should go about this?

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• Codeigniter Template library, add_js() method

  - by Karl

  using This Template Library when i try and use the add_js() function it errors out. I add the regions $_scripts to the template header file but when i load the page it says undefined variable _scripts. any thoughts? changed <?= $_scripts ?> to <?= (isset($_scripts)) ? $_scripts : “”; ?> and obviously i lose the error but the js file still isnt loading. I did an echo at each step though the add_js() method and the output is correct. I also did an output of $this-js and they both had the corret output. So it gets through the get_js method fine and sets the class variable fine but i dont get anything added to the actual page.

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• annotation pins in iphone

  - by alecnash

  Guys I am a little bit stuck here. So here it goes. I am using json to get latitude and longitude for a map project. I use these values to add some pins on the map. I also created a detail view for the pins. Here comes the tricky part. I want to load some images from my db to the detail view but I don't know how to tell the pins appart so the right image goes to the right pin. Thanks in advance

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• Pushing notifications to a JavaScript?

  - by Michael Stum

  I'm just wondering if there is a way to have a server push information to a JavaScript function. Essentially I have a Dashboard-type page that has a javaScript function to get updates from the server and update the dashboard. I would like my server to be able to "ping" the JS. I don't even know how that could be possible (I'm guessing Twitter and Facebook use polling?), but I'd thought I ask. I heard of Comet, but I don't know if that works with a plain standard IIS 7 installation? (It's a SharePoint 2010 site if that matters in any way) If I understand it correctly, Comet is essentially a constantly open connection, so it seems like it's actually the opposite of what I want (reducing # of requests and therefore load)

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• Problems with mod_rewrite and 301 redirects from one dynamic url to another

  - by user349891

  Hey all, I'm having all kinds of problems with a bunch of apache redirects just now and could really use some help! I'm wating to put in a 301 redirect for a load of urls from a client's old site to their new site in the following format; Old - page.php?pageNum_rs_all=0&totalRows_rs_all=112 New - page/sub?foo=bar The values in the query sting for the old site don't in any way tie up to any ids or references on the new site, I only want to match that specific request and redirect to the new page. It feels like I've tried just about every combination of rewriterule I can find online but still nothing seems to be working. This is running on Apache 2.2. The rule I started with (and keep going back to) is; RewriteRule ^/page.php\?pageNum_rs_all=0&totalRows_rs_all=112 /page/sub?foo=bar [R=301,L,NE] Any help would be greatly appreciated! c.

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• Deploying rails app on phusion passenger + Nginx

  - by user1028432

  I installed passenger + nginx: gem install passenger , passenger-install-nginx-module , and making init script nginx conf(/opt/nginx/conf/nginx.conf): worker_processes 1; events { worker_connections 1024; } http { passenger_root /home/rusik/.rvm/gems/ruby-2.0.0-p247@work/gems/passenger-4.0.21; passenger_ruby /home/rusik/.rvm/wrappers/ruby-2.0.0-p247@work/ruby; include mime.types; default_type application/octet-stream; sendfile on; rails_env development; server { listen 80; server_name www.myapp.com; charset utf-8; root /home/rusik/www/testapp/public; passenger_enabled on; } } restarting nginx , and page www.myapp.com doesn't load , what can be a problem?(changeing rails_env i tried , rails s i running) I am trying a lot of time to make it works , but can't , i am also tryed install through apt repositiry, but the problem is the same , the page doesn't loaded!

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