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Articles indexed Wednesday April 21 2010

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  • How to debug CSS/Javascript hover issues

    - by Jason Creighton
    I often find myself wanting to debug CSS layout issues that involve DOM changes caused by Javascript in reaction to a hover event or different CSS rules applying due to the :hover selector. Normally, I'd use Firebug to inspect the element that's giving me trouble and see what its CSS properties were, and where those properties come from. However, when hovering is involved, it becomes impossible, because as soon as you move your mouse down to the Firebug panel, the elements you're interested in are no longer hovered, the CSS rules that apply are different, and (in the case of JS hovers) the DOM is changed. Is there any way I can "freeze" the state of the DOM and application of :hover in order to inspect the DOM as it was during a hover event? Any other ideas on how to debug this sort of issue are welcome, of course.

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  • Freely-available, well-debugged regular expressions

    - by fsb
    I was reading ICU documentation and came across this fine advice: For common tasks like this there are libraries of freely available regular expressions that have been well debugged. It's worth making a quick search before writing a new expression. To which libraries of well-debugged regular expressions do you commonly refer? I'm not much taken with http://regexlib.com where the expressions don't seem all that well debugged. It appears to have no QA process besides user comments and ratings.

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  • Can I automatically throw descriptive exceptions with parameter values and class feild information?

    - by Robert H.
    I honestly don't throw exceptions often. I catch them even less, ironically. I currently work in shop where we let them bubble up to avicode. For whatever reason, however, avicode isn't configured to capture some of the critical bits I need when these exceptions come bouncing back to my attention. Specifically, I'd like to see the parameter values and the class’s field data at the time of the exception. I’d guess with the large suite of .Net services that I could create a static method to crawl up the stack, gather these bits and store them in a string that I could stick in my exception message. I really don't are how long such a method would take to execute as performance is no longer a concern when I hit one of these scenarios. If it's possible, I'm sure someone has done it. If that's the case, I'm having a hard time finding it. I think any search containing "exception" brings back too many resutls. Anyway, can this be done? If so, some examples or links would be great. Thanks in advance for your time, Robert

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  • Cannot delete an image file that is shown in a listview

    - by Enrico
    Hello all, In my listview I show thumbnails of small images in a certain folder. I setup the listview as follows: var imageList = new ImageList(); foreach (var fileInfo in dir.GetFiles()) { try { var image = Image.FromFile(fileInfo.FullName); imageList.Images.Add(image); } catch { Console.WriteLine("error"); } } listView.View = View.LargeIcon; imageList.ImageSize = new Size(64, 64); listView.LargeImageList = imageList; for (int j = 0; j < imageList.Images.Count; j++) { var item = new ListViewItem {ImageIndex = j, Text = "blabla"}; listView.Items.Add(item); } The user can rightclick on an image in the listview to remove it. I remove it from the listview and then I want to delete this image from the folder. Now I get the error that the file is in use. Of course this is logical since the imagelist is using the file. I tried to first remove the image from the imagelist, but I keep on having the file lock. Can somebody tell me what I am doing wrong? Thanks!

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  • Java - get index of key in HashMap?

    - by llm
    In java if I am looping over the keySet() of a HashMap, how do I (inside the loop), get the numerical index of that key? Basically, as I loop through the map, I want to be able to get 0,1,2...I figure this would be cleaner than declaring an int and incrementing with each iteration. Thanks.

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  • jQuery autocomplete disabled makes autocomplete partially transparent, not disabled

    - by Ryan Giglio
    I'm using the jQuery UI's "autocomplete" function on a search on my site. When you change a radio button from 'area search" to "name search" I want it to disable the autocomplete, and re-enable it when you switch back. However, when you disable the autocomplete it doesn't hide the dropdown, it just dims it to 20% opacity or so. Here's my javascript: var allFields = new Array(<?php echo $allFields ?>); $(document).ready(function() { if ($("input[name='searchType']:checked").val() == 'areaCode') { $("#siteSearch").autocomplete({ source: allFields, minLength: 2 }); } $("input[name='searchType']").change(function(){ if ($("input[name='searchType']:checked").val() == 'areaCode') { $( "#siteSearch" ).autocomplete( "option", "disabled", false ); alert("enabled"); } else { $( "#siteSearch" ).autocomplete( "option", "disabled", true ); alert("disabled"); } }); }); You can see it happening at http://crewinyourcode.com First you have to chose an area code to search, and then you can see the issue.

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  • Netbeans IDE tutorials

    - by James P.
    I mostly use Eclipse but have mentionned Netbeans on my cv. Are there any good concise and up-to-date tutorials apart from the official ones that could bring me up to speed on how to use the IDE efficiently (shortcuts, debugging, views ...)? This excludes programming tutorials as I don't really need them unless there's a special manipulation involved.

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  • C++ Get Username From Process

    - by modernzombie
    I have a process handle with HANDLE hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, 0, THE_PROCESS_ID); How can I get the username of the user that is running the process? I am using unmanaged code (no .NET).

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  • Error when pushing to Heroku - StatementInvalid - Ruby on Rails

    - by bgadoci
    I am trying to deploy my first rails app to Heroku and seem to be having a problem. After git push heroku master I get an error saying that relation "tags does not exist. I understand that without knowledge of my application it will be hard to help but I am wondering if someone can point me in the right direction. I have checked the schema.rb file and also been over all my migrations and there doesn't seem to be a problem there. The error message lead me to believe that I left something out of my routes.rb file but can't seem to find anything there either. Perhaps just some help deciphering this message. Processing PostsController#index (for 99.7.50.140 at 2010-04-21 12:28:59) [GET] ActiveRecord::StatementInvalid (PGError: ERROR: relation "tags" does not exist : SELECT a.attname, format_type(a.atttypid, a.atttypmod), d.adsrc, a.attnotnull FROM pg_attribute a LEFT JOIN pg_attrdef d ON a.attrelid = d.adrelid AND a.attnum = d.adnum WHERE a.attrelid = '"tags"'::regclass AND a.attnum > 0 AND NOT a.attisdropped ORDER BY a.attnum ): app/controllers/posts_controller.rb:9:in `index' /home/heroku_rack/lib/static_assets.rb:9:in `call' /home/heroku_rack/lib/last_access.rb:25:in `call' /home/heroku_rack/lib/date_header.rb:14:in `call' thin (1.0.1) lib/thin/connection.rb:80:in `pre_process' thin (1.0.1) lib/thin/connection.rb:78:in `catch' thin (1.0.1) lib/thin/connection.rb:78:in `pre_process' thin (1.0.1) lib/thin/connection.rb:57:in `process' thin (1.0.1) lib/thin/connection.rb:42:in `receive_data' eventmachine (0.12.6) lib/eventmachine.rb:240:in `run_machine' eventmachine (0.12.6) lib/eventmachine.rb:240:in `run' thin (1.0.1) lib/thin/backends/base.rb:57:in `start' thin (1.0.1) lib/thin/server.rb:150:in `start' thin (1.0.1) lib/thin/controllers/controller.rb:80:in `start' thin (1.0.1) lib/thin/runner.rb:173:in `send' thin (1.0.1) lib/thin/runner.rb:173:in `run_command' thin (1.0.1) lib/thin/runner.rb:139:in `run!' thin (1.0.1) bin/thin:6 /usr/local/bin/thin:20:in `load' /usr/local/bin/thin:20 Also, here is my routes.rb file if that helps at all. ActionController::Routing::Routes.draw do |map| map.resources :ugtags map.resources :wysihat_files map.resources :users map.resources :votes map.resources :votes, :belongs_to => :user map.resources :tags, :belongs_to => :user map.resources :ugtags, :belongs_to => :user map.resources :posts, :collection => {:auto_complete_for_tag_tag_name => :get } map.resources :posts, :sessions map.resources :posts, :has_many => :comments map.resources :posts, :has_many => :tags map.resources :posts, :has_many => :ugtags map.resources :posts, :has_many => :votes map.resources :posts, :belongs_to => :user map.resources :tags, :collection => {:auto_complete_for_tag_tag_name => :get } map.resources :ugtags, :collection => {:auto_complete_for_ugtag_ugctag_name => :get } map.login 'login', :controller => 'sessions', :action => 'new' map.logout 'logout', :controller => 'sessions', :action => 'destroy' map.root :controller => "posts" map.connect ':controller/:action/:id' map.connect ':controller/:action/:id.:format' end

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  • How do I pass a multi-dimensional array as a GET parameter in PHP?

    - by Onema
    I have the following code. $connect = new Connection (); $response = $connect->putFile($fileName, $destination); header("Location: /test.php?response=" . $response); When I invoke header with the response, the file will stop execution, but I will have no error in the console... I am thinking maybe this array needs to be encoded for the url? if that is the case how? Thank you

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  • Multiple key presses doing different events in C#

    - by Nevik Eeirnb
    Hi, private void Form1_KeyDown(object sender, KeyEventArgs e) { if (e.KeyCode == Keys.W) player1.moveUp(); if (e.KeyCode == Keys.NumPad8) player2.moveUp(); } In the above code the moveUp methods basically just increment a value. I want it so both keys can be pressed (or held down)at the same time and both events will trigger. Thanks, Nevik

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  • mod_rewrite with anchor link

    - by Graham
    Hi, thanks for looking. I know you can't redirect anchor URLs to another page, but is it possible to redirect a URL to only a single anchor? So http://www.example.com/video/{title} always gets sent to http://www.example.com/video.php?title={title}#player The only thing that changes is the title, anchor is always the same... I need to redirect to a certain slide on a coda slider

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  • VB.Net Validate an xml against a schema (strange problem)

    - by Apeksha
    I have written a small XML validator, that takes in an XML file and an XML schema and validates the XML files against that schema. It works well, except for an XML file, with this content: <?xml version="1.0" encoding="utf-8"?> <xc:program xmlns:xc="http:\\www.something.com\Schema\XC10" xc:version="4.0.22.0" > <xc:namespaceDecls> <xc:namespaceDecl xc:namespaceDeclURI="urn:swift:xsd:abc"> <xc:namespaceDeclPrefix>n</xc:namespaceDeclPrefix> </xc:namespaceDecl> </xc:namespaceDecls> </xc:program> I tried to validate this XML file against a bunch of different schemas. No matter which schema I select, this XML file comes out as valid. What is it that I am missing? Here is the relevant piece of code: 'Create a schema cache and add the given schema to it. Dim schemaCache As New Schema.XmlSchemaSet schemaCache.Add(targetNamespace, schemaFilename) 'Create an XML DOMDocument object. Dim xmlDom As New XmlDocument 'Assign the schema cache to the DOM document. 'schemas collection. xmlDom.Schemas = schemaCache 'Load selected file as the DOM document. xmlDom.Load(xmlFilename) xmlDom.Validate(AddressOf ValidationCallBack)

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  • Apple driving Adobe into Android's arms?

    <b>Linux Devices:</b> "Earlier this month, an Adobe employee told Apple to go screw itself over its new restrictive developer policies for the iPhone 4.0. Now, Adobe says, it's moving on, officially focusing its Flash technology on Google's Android and other competing smartphone platforms."

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  • df shows partition as full, but du shows it as only 25% full

    - by Jakobud
    I have a humble linux server to do some stuff for me. I only have an old 16gig drive in it. df -h Filesystem Size Used Avail Use% Mounted on /dev/md1 16G 16G 0 100% / /dev/md0 121M 14M 101M 13% /boot tmpfs 502M 0 502M 0% /dev/shm but when I do: du -sh / 3.5G / So one says that my 16G drive is full. The other says only 3.5G is used. Why the discrepancy? I cannot write any new files as it says the drive is indeed full. But if I can't find the files taking up all the space on the file-system, how can I delete them to free up space?

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  • Using Linq to concatenate strings

    - by tags2k
    What is the most efficient way to write the old-school: StringBuilder sb = new StringBuilder(); if (strings.Count > 0) { foreach (string s in strings) { sb.Append(s + ", "); } sb.Remove(sb.Length - 2, 2); } return sb.ToString(); ...in Linq?

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  • Why are my connections not closed even if I explicitly dispose of the DataContext?

    - by Chris Simpson
    I encapsulate my linq to sql calls in a repository class which is instantiated in the constructor of my overloaded controller. The constructor of my repository class creates the data context so that for the life of the page load, only one data context is used. In my destructor of the repository class I explicitly call the dispose of the DataContext though I do not believe this is necessary. Using performance monitor, if I watch my User Connections count and repeatedly load a page, the number increases once per page load. Connections do not get closed or reused (for about 20 minutes). I tried putting Pooling=false in my config to see if this had any effect but it did not. In any case with pooling I wouldn't expect a new connection for every load, I would expect it to reuse connections. I've tried putting a break point in the destructor to make sure the dispose is being hit and sure enough it is. So what's happening? Some code to illustrate what I said above: The controller: public class MyController : Controller { protected MyRepository rep; public MyController () { rep = new MyRepository(); } } The repository: public class MyRepository { protected MyDataContext dc; public MyRepository() { dc = getDC(); } ~MyRepository() { if (dc != null) { //if (dc.Connection.State != System.Data.ConnectionState.Closed) //{ // dc.Connection.Close(); //} dc.Dispose(); } } // etc } Note: I add a number of hints and context information to the DC for auditing purposes. This is essentially why I want one connection per page load

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