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• Slow Performance -- ASP .NET ASPNET_WP.EXE and CSC.EXE Running After Clicking Redirect Link

  - by Dan7el

  I click on a link from one page that does a redirect to another page (Response.Redirect(page.aspx)). The browser churns for about 30 seconds and the page displays. I'm trying to track down why it takes so long to load the page. The page hosts two other custom controls. I have commented out the lines of code for each and both controls, and the page still takes about 30 seconds to load. I've set breakpoints on the Page_Load event for each of the controls as well as page.aspx and it also takes about 30 seconds from clicking the link with the Response.Redirect to the first break point. I loaded up task manager and clicked on the link. I notice aspnet_wp.exe and csc.exe run during this 30 second time frame. I'm wondering if there are some sort of code-behind shinanigans going on while I'm waiting for the page to load. This only occurs the first time I click on the link. Afterwards, it's not as slow. I've googled but there's not a lot of useful information about this. Anyone have any ideas? Thanks, ---Dan---

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• C# WPF XAML DataTable binding to relationship

  - by LnDCobra

  I have the following tables: Company {CompanyID, CompanyName} Deal {CompanyID, Value} And I have a listbox: <ListBox Name="Deals" Height="100" Width="420" Margin="0,20,0,0" HorizontalAlignment="Left" VerticalAlignment="Top" Visibility="Visible" IsSynchronizedWithCurrentItem="True" ItemsSource="{Binding}" SelectionChanged="Deals_SelectionChanged"> <ListBox.ItemTemplate> <DataTemplate> <StackPanel Orientation="Horizontal"> <TextBlock Text="{Binding companyRowByBuyFromCompanyFK.CompanyName}" FontWeight="Bold" /> <TextBlock Text=" -> TGS -> " /> <TextBlock Text="{Binding BuyFrom}" FontWeight="Bold" /> </StackPanel> </DataTemplate> </ListBox.ItemTemplate> </ListBox> As you can see, I want to display the CompanyName rather then the ID which is a foreign Key. The relation "companyRowByBuyFromCompanyFK" exists, as in Deals_SelectionChanged I can access companyRowByBuyFromCompanyFK property of the Deals row, and I also can access the CompanyName propert of that row. Is the reason why this is not working because XAML binding uses the [] indexer? Rather than properties on the CompanyRows in my DataTable? At the moment im getting values such as - TGS - 3 - TGS - 4 What would be the best way to accomplish this? Make a converter to convert foreign keys using Table being referenced as custom parameter. Create Table View for each table? This would be long winded as I have quite a large number of tables that have foreign keys.

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• Mysql Algorithm for Determining Closest Colour Match

  - by buggedcom

  I'm attempting to create a true mosaic application. At the moment I have one mosaic image, ie the one the mosaic is based on and about 4000 images from my iPhoto library that act as the image library. I have already done my research and analysed the mosaic image. I've converted it into 64x64 slices each of 8 pixels. I've calculated the average colour for each slice and assertain the r, g, b and brightness (Luminance (perceived option 1) = (0.299*R + 0.587*G + 0.114*B)) value. I have done the same for each of the image library photos. The mosaic slices table looks like so. slice_id, slice_image_id, slice_slice_id, slice_image_column, slice_image_row, slice_colour_hex, slice_rgb_red, slice_rgb_blue, slice_rgb_green, slice_rgb_brightness The image library table looks like so. upload_id, upload_file, upload_colour_hex, upload_rgb_red, upload_rgb_green, upload_rgb_blue, upload_rgb_brightness So basically I'm reading the image slices from the slices table into PHP and then pulling out the appropriate images from the library table based on the colour hexs. My trouble is that I've been on this too long and probably had too many energy drinks so am not concentrating properly, I can't figure out the way to pick out the nearest colour neighbor if the appropriate hex code doesn't exist. Any ideas on the perfect query? NB: I know pulling out the slices one by one is not ideal however the mosaic is only rebuilt periodically so a sudden burst in the mysql load doesn't really bother me, however if there us a way to pull the images out all at once that would also be a massive bonus.

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• Silverlight WCF access returning an IList of LLBLGen entities?

  - by Tim

  Hi I'm having a problem passing an entity collection back from LLBLGen to silverlight. My contract looks like this. I don't even know if this is possible. My web service code looks like this: public IEnumerable GetCustomer(long custId, string acctKey) { var toReturn = new WaterWorksCustomersEntity(custId, acctKey); using (var adapter = new DataAccessAdapter()) { adapter.ConnectionString = "data source=CWCPROD.cwc.local;user.."; adapter.FetchEntity(toReturn); } IList customers = new List(); customers.Add(toReturn); return customers; } On the silverlight client I'm doing ... var client = new Service1Client(); client.GetCustomerCompleted +=new EventHandler(client_GetCustomerCompleted); client.GetCustomerAsync(2,"110865"); The compilation is failing with this error: Error 1 The type or namespace name 'ArrayOfXElement' does not exist in the namespace 'AppointmentClientSL.ServiceReference1' (are you missing an assembly reference?) c:\work\Appointment\Appointment\AppointmentClientSL\Service References\ServiceReference1\Reference.cs 63 54 AppointmentClientSL It looks like SL is not able to deal with the data the web service is returning. Can anyone help???

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• Code Golf: 1x1 black pixel

  - by Joey Adams

  Recently, I used my favorite image editor to make a 1x1 black pixel (which can come in handy when you want to draw solid boxes in HTML cheaply). Even though I made it a monochrome PNG, it came out to be 120 bytes! I mean, that's kind of steep. 120 bytes. For one pixel. I then converted it to a GIF, which dropped the size down to 43 bytes. Much better, but still... Challenge The shortest image file or program that is or generates a 1x1 black pixel. A submission may be: An image file that represents a 1x1 black pixel. The format chosen must be able to represent larger images than 1x1, and cannot be ad-hoc (that is, it can't be an image format you just made up for code golf). Image files will be ranked by byte count. A program that generates such an image file. Programs will be ranked by character count, as usual in code golf. As long as an answer falls into one of these two categories, anything is fair game.

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• GWT Internationalization throws an exception while rebinding

  - by Stephane Grenier

  I'm trying to internationalize a test application with GWT following the instruction and I have: com.example.client.MyConstants.java com.example.client.MyConstants_en.properties com.example.client.MyConstants_fr.properties com.example.client.MyAppEntryPoint.java In this code I have: public interface MyConstants extends Constants { @DefaultStringValue("HelloWorld") String hellowWorld(); } And public class MyAppEntryPoint implements EntryPoint { public void onModuleLoad() { MyConstants constants = GWT.create(MyConstants.class); VerticalPanel mainPanel = new VerticalPanel(); mainPanel.add(new Label(constants.hellowWorld())); RootPanel.get("myContainer").add(mainPanel); } } For MyApp.gwt.xml I have: <module rename-to="myModule"> <inherits name="com.google.gwt.xml.XML" /> <inherits name="com.google.gwt.i18n.I18N"/> <inherits name='com.google.gwt.user.theme.standard.Standard'/> <!-- Specify the app entry point class. --> <entry-point class='com.example.client.MyAppEntryPoint'/> <extend-property name="locale" values="en,fr"/> </module> In the html I have: ... It all seems to work as long as I don't include in the xml file. As soon as I do, I get the following exception: [ERROR] Generator 'com.google.gwt.i18n.rebind.LocalizableGenerator' threw threw an exception while rebinding 'com.example.client.myConstants' java.lang.NullPointerException: null ... Any help would be greatly appreciated on why it's throwing the exception. -

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• Where does lucene .net cache the search results?

  - by Lanceomagnifico

  Hi, I'm trying to figure out where Lucene stores the cached query results, and how it's configured to do so - and how long it caches for. This is for an ASP.NET 3.5 solution. I'm getting this problem: If I run a search and sort the result by a particular product field, it seems to work the very first time each search and sort combination is used. If I then go in and change some product attributes, reindex and run the same search and sort, I get the products returned in the same order as the very first result. example Product A is named: foo Product B is named: bar For the first search, sort by name desc. This results in: Product A Product B Now mix up the data a bit: Change names to: Product A named: bar Product B named: foo reindex verify that the index contains the changes for these two products. search Result: Product A Product B Since I changed the alphabetical order of the names, I expected: Product B Product A So I think that Lucene is caching the search results. (Which, btw, is a very good thing.) I just need to know where/how to clear these results. I've tried deleting the index files and doing an IISreset to clear the memory, but it seems to have no effect. So I'm thinking there is another set of Lucene files outside of the indexes that Lucene uses for caching. EDIT I just found out that you must create the index for field you wish to sort on as un-tokenized. I had the field as tokenized, so sorting didn't work.

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• Why is Selenium RC so slow?

  - by Pete

  Hi. For some time I have been investigating Selenium RC in order to do functional testing of my web application. I have now found a test strategy that is so effective, that I do not want to move away from Selenium RC (after spending weeks trying to figure out a good way to validate ASP.NET validation controls). But now that my Selenium RC adventure is moving from a POC to be something that I actually use, I'm running into a problem. It is insanely slow. Executing a single test that loads a page, fills in some fields, and clicks a button takes in the magnitude of seconds to execute. When it is executing, I can easily see each individual field being filled out one at a time. Using Selenium IDE in Firefox is not that slow. I found this page, that clearly specifies that Selenium RC is slow http://selenium-grid.seleniumhq.org/how_it_works.html But why is that? Is it because the browser is polling the selenium server? If so, can this polling interval not be modified? Or is there another reason. I am not accustomed to a remote call taking a humanly noticable amount of time to execute. It is horrible that executing a few tests should take so long. I can execute my entire presentation (MVP), business, and database layer test suite (500+ tests) way quicker than it takes to run 10 tests for a single web page.

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• 2-column; multi-accordion pane

  - by Josh

  Alright, I'm having some issues and I believe it's a CSS one. Here is what I'm working on currently: http://www.notedls.com/demo/ Focusing on the News accordion menu. The idea here is to have a small image (50x50 with padding) and then a huge headline next to it. When the user clicks the headline, it expands to the article. If the user wants to read comments or make a comment themselves they can then click the View Comments to expand it even further. The issue I'm having (if it isn't clear) is the spacing with the image and the text. I could simply just increase the height of the ui.accordion-acc or -left to make everything fit, but that doesn't solve the issue. If you notice when you click on the first expansion of Headline 1, it will wrap View Comments underneath the image. This is something I don't want, I've tried separating these elements into additional divs and even floating, but its just not working. Essentially, I want blank space infinitely underneath the image for however long the article+comments may take the field.

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• MySQL performance - 100Mb ethernet vs 1Gb ethernet

  - by Rob Penridge

  Hi All I've just started a new job and noticed that the analysts computers are connected to the network at 100Mbps. The ODBC queries we run against the MySQL server can easily return 500MB+ and it seems at times when the servers are under high load the DBAs kill low priority jobs as they are taking too long to run. My question is this... How much of this server time is spent executing the request, and how much time is spent returning the data to the client? Could the query speeds be improved by upgrading the network connections to 1Gbps? (Updated for the why): The database in question was built to accomodate reporting needs and contains massive amounts of data. We usually work with subsets of this data at a granular level in external applications such as SAS or Excel, hence the reason for the large amounts of data being transmitted. The queries are not poorly structured - they are very simple and the appropriate joins/indexes etc are being used. I've removed 'query' from the Title of the post as I realised this question is more to do with general MySQL performance rather than query related performance. I was kind of hoping that someone with a Gigabit connection may be able to actually quantify some results for me here by running a query that returns a decent amount of data, then they could limit their connection speed to 100Mb and rerun the same query. Hopefully this could be done in an environment where loads are reasonably stable so as not to skew the results. If ethernet speed can improve the situation I wanted some quantifiable results to help argue my case for upgrading the network connections. Thanks Rob

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• calling CreateFile, specifying FILE_ATTRIBUTE_TEMPORARY | FILE_FLAG_DELETE_ON_CLOSE.

  - by alexander-daniels

  Before I describe my problem, here is a description of the program I'm writting: This is a C++ application. The purpose of my program is to create file on RAM memory. I read that if specify FILE_ATTRIBUTE_TEMPORARY | FILE_FLAG_DELETE_ON_CLOSE when creating file it will be loaded direct to the RAM memory. One of blogs that talk about is this one: http://blogs.msdn.com/larryosterman/archive/2004/04/19/116084.aspx I have built a mini-program, but it not achieves the goal. Instead, it creates a file on hard-drive on directory I specify. Here's my program: void main () { LPCWSTR str = L"c:\temp.txt"; HANDLE fh = CreateFile(str,GENERIC_WRITE,0,NULL,CREATE_ALWAYS, FILE_ATTRIBUTE_TEMPORARY | FILE_FLAG_DELETE_ON_CLOSE,NULL); if (fh == INVALID_HANDLE_VALUE) { printf ("Could not open TWO.TXT"); return; } DWORD dwBytesWritten; for (long i=0; i<20000000; i++) { WriteFile(fh, "This is a test\r\n", 16, &dwBytesWritten, NULL); } return; } I think there problem in CreateFile function, but I can't fix it. Please help me.

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• UIViewAnimationTransitionCurlUp in landscape mode transitioning right-to-left

  - by Thanos

  I have a view controller that is showing in portrait mode. When you touch the "menu" button, it calls the code below and it flips up to the MainMenu controller. So far, so good. - (void) menuButton: (id) sender { MainMenu_ViewController * viewController = [[MainMenu_ViewController alloc] initWithNibName:@"MainMenu_ViewController" bundle:nil]; self.menuView = viewController.view; self.menuView.frame = self.view.bounds; [viewController release]; [UIView beginAnimations:nil context: nil]; [UIView setAnimationDuration: 1.0]; [UIView setAnimationTransition: UIViewAnimationTransitionCurlUp forView: self.view cache: YES]; [self.view addSubview: self.menuView]; [UIView commitAnimations]; } However, when you do the same in landscape mode, instead of the animation flipping up (with respect to gravity, i.e. towards the long end of the iPhone) it flips towards the left (i.e. towards the short end of the iPhone). Is this a limitation of the animation, or am I missing something?

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• Differing paths for lua script and app

  - by Person

  My problem is that I'm having trouble specifying paths for Lua to look in. For example, in my script I have a require("someScript") line that works perfectly (it is able to use functions from someScript when the script is run standalone. However, when I run my app, the script fails. I believe this is because Lua is looking in a location relative to the application rather than relative to the script. Hardcoding the entire path down to the drive isn't an option since people can download the game wherever they like so the highest I can go is the root folder for the game. We have XML files to load in information on objects. In them, when we specify the script the object uses, we only have to do something like Content\Core\Scripts\someScript.lua where Content is in the same directory as Debug and the app is located inside Debug. If I try putting that (the Content\Core...) in Lua's package.path I get errors when I try to run the script standalone. I'm really stuck, and am not sure how to solve this. Any help is appreciated. Thanks. P.S. When I print out the default package.path in the app I see syntax like ;.\?.lua in a sequence like... ;.\?.lua;c:...(long file path)\Debug\?.lua; I assume the ; means the end of the path, but I have no idea what the .\?.lua means. Any Lua file in the directory?

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• C#.NET Forms programing - Modal and Non-Modal forms problem

  - by Povilas

  Hello, I have a problem with modality of the forms under C#.NET. Let's say I have main form #0 (see the image below). This form represents main application form, where user can perform various operations. However, from time to time, there is a need to open additional non-modal form to perform additional main application functionality supporting tasks. Let's say this is form #1 in the image. On this #1 form there might be opened few additional modal forms on top of each other (#2 form in the image), and at the end, there is a progress dialog showing a long operation progress and status, which might take from few minutes up to few hours. The problem is that the main form #0 is not responsive until you close all modal forms (#2 in the image). I need that the main form #0 would be operational in this situation. However, if you open a non-modal form in form #2, you can operate with both modal #2 form and newly created non modal form. I need the same behavior between the main form #0 and form #1 with all its child forms. Is it possible? Or am I doing something wrong? Maybe there is some kind of workaround, I really would not like to change all ShowDialog calls to ShowDialog... Thanks, Povilas

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• Filter Dynamically Calendar View SharePoint

  - by lerac

  Hello world I'm using SP wss 3.0 wondering if anybody knows how to filter a calendar view in SharePoint dynamically based upon the current user. It's not the simple question of using [ME] because this will not work with single line text fields. Also users do not add the items, they are being imported. So filtering on the basis of Created by, Modified by, Assigned to, or People picking data is not a option. Already managed to get to the current user in a jScript variable, now I would like to filter it in the calendar view. Been searching for a long time now, but can't seem to find anything. Altough filtering with a all items view is possible, yet I can't seem to find a way to dynamically filter a calendar view. Already tried modifing allitems.aspx view page in Designer Fooling around with CAML jScript (as far as I know) Calculated views Google (find more other cool things then a solution) Ofcourse I don't expect a solution on a silver platter (ofcourse would be nice ;) ), but if somebody can point me into a direction I already would be quite happy.

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• Proper 'cleartool mkview' for ClearCase Snapshot view creation

  - by Jörg Battermann

  Good afternoon, seems like I am somewhat stuck in CC-land these days, but I have one (hopefully) final question regarding proper CC-handling: When using the CC View Creation Wizard with the two steps / details below, I can create a proper Snapshot view on my machine perfectly fine, however when trying to do the same with the mkview command, it fails... Here are the screenshots of the view creation wizard: Now that results into the (working) following view: cleartool> lsview battjo6r_view2 battjo6r_view2 \\Eh40yd4c\Views\battjo6r_view2.vws cleartool> lsview -long battjo6r_view2 Tag: battjo6r_view2 Global path: \\Eh40yd4c\Views\battjo6r_view2.vws Server host: Eh40yd4c Region: CT_WORK Active: NO View tag uuid:f34cf43f.b4d048df.845d.ed:21:a2:9c:45:ff View on host: Eh40yd4c View server access path: D:\Views\battjo6r_view2.vws View uuid: f34cf43f.b4d048df.845d.ed:21:a2:9c:45:ff View attributes: snapshot View owner: WW005\battjo6r However, when trying to create the view manually via mkview -snapshot -tag battjo6r_view2 -vws \\Eh40yd4c\Views\battjo6r_view2.vws -host Eh40yd4c -hpath D:\Views\battjo6r_view2.vws -gpath \\Eh40yd4c\Views\battjo6r_view2.vws battjo6r_view2 ... I get the following error: cleartool> mkview -snapshot -tag battjo6r_view2 -vws \\Eh40yd4c\Views\battjo6r_view2.vws -host Eh40yd4c -hpath D:\Views\battjo6r_view2.vws -gpath \\Eh40yd4c\Views\battjo6r_view2.vws battjo6r_view2 Created view. Host-local path: Eh40yd4c:D:\Views\battjo6r_view2.vws Global path: \\Eh40yd4c\Views\battjo6r_view2.vws cleartool: Error: Unable to find view by uuid:6f99f7ae.6a5d40e4.ba32.37:8e:e5:a4:ed:18, last known at "<viewhost>:<stg_path>". cleartool: Error: Unable to establish connection to snapshot view "6f99f7ae.6a5d40e4.ba32.37:8e:e5:a4:ed:18": ClearCase object not found cleartool: Warning: Unable to open snapshot view "D:\SnapShotViews\battjo6r_view2". cleartool: Error: Unable to create snapshot view "battjo6r_view2". Removing the view ... Any idea why this is happening? Am I missing something?

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• Bluetooth development on Windows mobile 6 C#

  - by cheesebunz

  Hi everyone, i recently started on a project which is a puzzle slider game. This application will be using the Bluetooth, and i'm working on the mobile,Samsung omnia i900. This is how my application will work. Any user with this Samsung device plays the game and starts sliding the tiles. There is an option to search and connect to other users with the same device and application, so that they can solve the puzzle together. Right now, i'm working on the Bluetooth Part but am still new to the API. I'm using the 32feet.NET inthehandpersonal.net class library while encountering much difficulties. I am able to search for devices by using: private void btnSearch_Click(object sender, EventArgs e) { BluetoothRadio.PrimaryRadio.Mode = RadioMode.Discoverable; BluetoothRadio myRadio = BluetoothRadio.PrimaryRadio; lblSearch.Text = "" + myRadio.LocalAddress.ToString(); bluetoothClient = new BluetoothClient(); Cursor.Current = Cursors.WaitCursor; BluetoothDeviceInfo[] bluetoothDeviceInfo = { }; bluetoothDeviceInfo = bluetoothClient.DiscoverDevices(10); comboBox1.DataSource = bluetoothDeviceInfo; comboBox1.DisplayMember = "DeviceName"; comboBox1.ValueMember = "DeviceAddress"; comboBox1.Focus(); Cursor.Current = Cursors.Default; } Well, to be honest this is a rip off from some sources i found on the internet but i do understand this part. Next i went on to trying to sending a simple "testing.txt" file and i'm stucked at it. I think i will be using something like the OBEX and Obexwebrequest, obexwebresponse, Uri etc. Could anyone explain it in simple terms for me so that i could understand what they are so that i could continue pairing and etc on Bluetooth development. Sorry making it this long, really appreciate if anyone did waste some time reading it :). Hope alanM sees this :) i'm using their bluetooth library.

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• Visual Studio setup problem - 'A problem has been encountered while loading the setup components. Ca

  - by kronoz

  Hi All, I've had a serious issue with my Visual Studio 2008 setup. I receive the ever-so-useful error 'A problem has been encountered while loading the setup components. Canceling setup.' whenever I try to uninstall, reinstall or repair Visual Studio 2008 (team system version). If I can't resolve this issue I have no choice but to completely wipe my computer and start again which will take all day long! I've recently received very strange errors when trying to build projects regarding components running out of memory (despite having ~2gb physical memory free at the time) which has rendered my current VS install useless. Note I installed VS2005 shell version using the vs_setup.msi file in the SQL Server folder after I had installed VS2008, in order to gain access to the SQL Server 2005 Reporting Services designer in Business Intelligence Development Studio (this is inexplicably unavailable in VS2008). Does anyone have any solutions to this problem? P.S.: I know this isn't directly related to programming, however I feel this is appropriate to SO as it is directly related to my ability to program at all! Note: A colleague found a solution to this problem, hopefully this should help others with this problem.

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• Single Sign On for Web Application and Application in Virtual Directory

  - by Stefan

  To enable single sign-on for a web application and a web application in a virtual directory, I set the machinekey in both apps to the same: <machineKey validationKey="xxx" decryptionKey="yy" validation="SHA1" /> The single sign on works just fine, but existing users can't sign in any more; their passwords are rejected. The machinekey used to be this in the parent application: <machineKey validationKey="xxx,IsolateApps" decryptionKey="yy,IsolateApps" validation="SHA1" /> I tried other ways to make single sign on work, but it just won't as long as the keys contain "IsolateApps". What am I missing? I should add that the in the membership provider, passwordFormat is set to "Encrypted". So I assume the password was encrypted using the key that contained "IsolateApps" and now when it tries to validate the password it's using the key without the "IsolateApps". Still not sure how to solve that problem. Is there maybe a way that I can set the encryption keys for the password separately from the one that is used for the authentication cookie?

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• C#: How to force "calling" a method from the main thread by signaling in some way from another thread

  - by Fire-Dragon-DoL

  Sorry for long title, I don't know even the way on how to express the question I'm using a library which run a callback from a different context from the main thread (is a C Library), I created the callback in C# and when gets called I would like to just raise an event. However because I don't know what will be inside the event, I would like to find a way to invoke the method without the problem of locks and so on (otherwise the third party user will have to handle this inside the event, very ugly) Are there any way to do this? I can be totally on the wrong way but I'm thinking about winforms way to handle different threads (the .Invoke thing) Otherwise I can send a message to the message loop of the window, but I don't know a lot about message passing and if I can send "custom" messages like this Example: private uint lgLcdOnConfigureCB(int connection, System.IntPtr pContext) { OnConfigure(EventArgs.Empty); return 0U; } this callback is called from another program which I don't have control over, I would like to run OnConfigure method in the main thread (the one that handles my winform), how to do it? Or in other words, I would like to run OnConfigure without the need of thinking about locks

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• SSL Slow in IE 8.0.7600.16385IC

  - by discovery.jerrya

  I'm having a performance problem on my company's web site using a specific version of IE 8 to load a page using https. Here's what I know. Server: Virtual machine running on VMWare ESX Windows Server 2003 Enterprise Edition SP 2 Tomcat 6.0.16 Client: Windows XP and Window 7 Internet Explorer 8.0.7600.16385IC Page loads/refreshes in under 1 second using HTTP. Page loads/refreshes in 15-16 seconds in HTTPS using this version of IE. Problem reproduced on multiple client machines with same IE version. Problem reproduced on multiple client machines with different Windows versions (XP and 7). No performance problem using Chrome, Firefox, Opera, or Safari from same machine. No performance problem using other versions of IE 8 on other machines. Slow load causes virtually no CPU, memory, or I/O spike on server or client machine. No performance problem on other sites using HTTPS on same client machine. The pages in question use JavaScript and innerHTML to replace the contents of div elements to create a collapsible menu, and an iframe to display some content. A couple of the div elements contain images. If I remove the iframe and the JavaScript, the performance issues go away. However, rewriting the entire site to make these changes would be very time consuming. We're in the process of replacing the whole site, but it may be 2-3 months before we do so and we really cannot live with this slowdown that long. I've already looked at several IE tuning options, such as disabling add ons, running IE-rereg, and resetting IE, with no luck. Does anyone have any suggestions?

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• Web crawler update strategy

  - by superb

  I want to crawl useful resource (like background picture .. ) from certain websites. It is not a hard job, especially with the help of some wonderful projects like scrapy. The problem here is I not only just want crawl this site ONE TIME. I also want to keep my crawl long running and crawl the updated resource. So I want to know is there any good strategy for a web crawler to get updated pages? Here's a coarse algorithm I've thought of. I divided the crawl process into rounds. Each round URL repository will give crawler a certain number (like , 10000) of URLs to crawl. And then next round. The detailed steps are: crawler add start URLs to URL repository crawler ask URL repository for at most N URL to crawl crawler fetch the URLs, and update certain information in URL repository, like the page content, the fetch time and whether the content has been changed. just go back to step 2 To further specify that, I still need to solve following question: How to decide the "refresh-ness" of a web page, which indicates the probability that this web page has been updated ? Since that is an open question, hopefully it will brought some fruitful discussion here.

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• Add a :filter param to the end of a url

  - by bob

  Hello, I am building an application that requires a search to go deeper than the initial level. I am using nested scopes to accomplish this and params in the URL For example, when a user searches for "handbag" it creates a query like the following. http://localhost:3000/junks?search=handbag&condition=&category=&main_submit=Go! I want to add a :filter param to the end of this url and reload the page with the new url. http://localhost:3000/junks?search=handbag&condition=&category=&main_submit=Go!&filter=lowest_price As shown above the &filter=lowest_price is added to the query. I have already written controller code to handle this and I know it works as long as the query is like the 2nd link above. my views code <div class = "filter_options"> <p> <strong>Filter by:</strong> <%= link_to_unless_current "Recent", :filter => 'recent' %> | <%= link_to_unless_current "Lowest Price", :filter => 'lowest_price' %> | <%= link_to_unless_current "Highest Price", :filter => 'highest_price' %> </p> </div> This is how I have it currently, which works if my URL does not have a search string attached to it. Unfortunately, this will go to a http://localhost:3000/junks?filter=lowest_price even if there is a search string. I would like to know how to create my links so that they add onto the search string shown in the 2nd code example. Additionally, if a search string with a filter is already present, it would only change that filter and resubmit the search string with the new filter. I hope I am being clear.

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• PDFObject load event

  - by Priyank

  Hi. We are trying to load a pdf file in web browser using pdfobject javascript api. Currently the size of the pdf's that we are trying to display is close to 10MBs. This creates a long delay in displaying a PDF on web page; while the complete PDF gets downloaded. We need to remove this lag by achieving either of the alternatives: Show a progress bar until the PDF is actually displayed. We couldn't find an event which is triggered and can be used to find out if pdf is visible now. This lacking doesn't let us decide when to stop showing progress bar/spinner OR lazy load the PDF such that it gets displayed as soon as first page gets loaded. With that ateast user will have a visual indication as to something is happening. We couldn'find anything in pdf object that lets us do a lazy load. User alternative pdf rendering api; this is a low priority as we already have complete code in place; but in an event of first 2 alternatives not being met; we'd have to consider this option. So please feel free to suggest. Any other ideas as to how user interaction can be made more intuitive or pleasant; would be welcome. Cheers

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• JS: variable inheritance in anonymous functions - scope

  - by tkSimon

  hey guys, someone from doctype sent me here. long story short: var o="before"; x = function() //this needs to be an anonymous function { alert(o); //the variable "o" is from the parent scope }; o="after"; //this chages "o" in the anonymous function x(); //this results in in alert("after"); //which is not the way i want/need it in reality my code is somewhat more complex. my script iterates through many html objects and adds an event listener each element. i do this by declaring an anonymous function for each element and call another function with an ID as argument. that ID is represented by the "o"-variable in this example. after some thinking i understand why it is the way it is, but is there a way to get js to evaluate o as i declare the anonymous function without dealing with the id attribute and fetching my ID from there? my full source code is here: http://pastebin.com/GMieerdw the anonymous function is on line 303

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