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  • Rails routes matching query parameters

    - by Harry Wood
    Rails routes are great for matching RESTful style '/' separated bits of a URL, but can I match query parameters in a map.connect config. I want different controllers/actions to be invoked depending on the presence of a parameter after the '?'. I was trying something like this... map.connect "api/my/path?apple=:applecode", :controller = 'apples_controller', :action = 'my_action' map.connect "api/my/path?banana=:bananacode", :controller = 'bananas_controller', :action = 'my_action' For routing purposes I don't care about the value of the parameter, as long as it is available to the controller in the 'params' hash

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  • Backtracking infinite loop

    - by Greenhorn
    This is Exercise 28.1.2 from HtDP. I've successfully implemented the neighbors function and all test cases pass. (define Graph (list (list 'A (list 'B 'E)) (list 'B (list 'E 'F)) (list 'C (list 'D)) (list 'D empty) (list 'E (list 'C 'F)) (list 'F (list 'D 'G)) (list 'G empty))) (define (first-line n alist) (cond [(symbol=? (first alist) n) alist] [else empty])) ;; returns empty if node is not in graph (define (neighbors n g) (cond [(empty? g) empty] [(cons? (first g)) (cond [(symbol=? (first (first g)) n) (first-line n (first g))] [else (neighbors n (rest g))])])) ; test cases (equal? (neighbors 'A Graph) (list 'A (list 'B 'E))) (equal? (neighbors 'B Graph) (list 'B (list 'E 'F))) (equal? (neighbors 'C Graph) (list 'C (list 'D))) (equal? (neighbors 'D Graph) (list 'D empty)) (equal? (neighbors 'E Graph) (list 'E (list 'C 'F))) (equal? (neighbors 'F Graph) (list 'F (list 'D 'G))) (equal? (neighbors 'G Graph) (list 'G empty)) (equal? (neighbors 'H Graph) empty) The problem comes when I copy-paste the code from Figure 77 of the text. It is supposed to determine whether a destination node is reachable from an origin node. However it appears that the code goes into an infinite loop except for the most trivial case where the origin and destination nodes are the same. ;; find-route : node node graph -> (listof node) or false ;; to create a path from origination to destination in G ;; if there is no path, the function produces false (define (find-route origination destination G) (cond [(symbol=? origination destination) (list destination)] [else (local ((define possible-route (find-route/list (neighbors origination G) destination G))) (cond [(boolean? possible-route) false] [else (cons origination possible-route)]))])) ;; find-route/list : (listof node) node graph -> (listof node) or false ;; to create a path from some node on lo-Os to D ;; if there is no path, the function produces false (define (find-route/list lo-Os D G) (cond [(empty? lo-Os) false] [else (local ((define possible-route (find-route (first lo-Os) D G))) (cond [(boolean? possible-route) (find-route/list (rest lo-Os) D G)] [else possible-route]))])) Does the problem lie in my code? Thank you.

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  • Java certification roadMap

    - by NoProblemBabe
    I am a .net programmer for sometime, and I was thinking about getting a Java certification, but unlike .Net, Java is a mystery to me. What are good certification books? What is the roadmap for the certifications? Is that the best path, or the only path? http://in.sun.com/training/certification/java/ Thank you very much

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  • using LoadControl with object initializer to create properties

    - by lloydphillips
    In the past I've used UserControls to create email templates which I can fill properties on and then use LoadControl and then RenderControl to get the html for which to use for the body text of my email. This was within asp.net webforms. I'm in the throws of building an mvc website and wanted to do something similar. I've actually considered putting this functionality in a seperate class library and am looking into how I can do this so that in my web layer I can just call EmailTemplate.SubscriptionEmail() which will then generate the html from my template with properties in relevant places (obviously there needs to be parameters for email address etc in there). I wanted to create a single Render control method for which I can pass a string to the path of the UserControl which is my template. I've come across this on the web that kind of suits my needs: public static string RenderUserControl(string path, string propertyName, object propertyValue) { Page pageHolder = new Page(); UserControl viewControl = (UserControl)pageHolder.LoadControl(path); if (propertyValue != null) { Type viewControlType = viewControl.GetType(); PropertyInfo property = viewControlType.GetProperty(propertyName); if (property != null) property.SetValue(viewControl, propertyValue, null); else { throw new Exception(string.Format( "UserControl: {0} does not have a public {1} property.", path, propertyName)); } } pageHolder.Controls.Add(viewControl); StringWriter output = new StringWriter(); HttpContext.Current.Server.Execute(pageHolder, output, false); return output.ToString(); } My issue is that my UserControl(s) may have multiple and differing properties. So SubscribeEmail may require FirstName and EmailAddress where another email template UserControl (lets call it DummyEmail) would require FirstName, EmailAddress and DateOfBirth. The method above only appears to carry one parameter for propertyName and propertyValue. I considered an array of strings that I could put the varying properties into but then I thought it'd be cool to have an object intialiser so I could call the method like this: RenderUserControl("EmailTemplates/SubscribeEmail.ascs", new object() { Firstname="Lloyd", Email="[email protected]" }) Does that make sense? I was just wondering if this is at all possible in the first place and how I'd implement it? I'm not sure if it would be possible to map the properties set on 'object' to properties on the loaded user control and if it is possible where to start in doing this? Has anyone done something like this before? Can anyone help? Lloyd

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  • JSTL expression evaluation from a string

    - by Venkatesh
    Is it possible to evaluate a String as EL expression in JSP and get value from it? I need an expression like ${model.${fieldPath}} where fieldPath will contain the required object path from a nested object model. I can get the actual field path by using but I am not sure how to evaluate a string and get the value from it Any help regarding this would be highly appreciated.

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  • Convert integer to formatted LPCWSTR. C++

    - by Mr Bell
    I have a direct3d project that uses D3DXCreateTextureFromFile() to load some images. This function takes a LPCWSTR for the path to file. I want to load a series of textures that are numbered consecutively (ie. MyImage0001.jpg, MyImage0002.jpg, etc) But c++'s crazy strings confuse me. How do i: for(int i=0; i < 3;i++) { //How do I convert i into a string path i can use with D3DXCreateTextureFromFile? }

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  • Selecting and Copying a Random File Several Times

    - by user1252778
    [Edit: see below for final code] I have the following code and I'm trying to figure out where to insert the random.choice code to make it select a single file, copy it, and repeat (here 6 times). import os import shutil import random dir_input = str(input("Enter Source Directory: ")) src_files = (os.listdir(dir_input)) for x in range (0,5): print ('This is the %d time' % x) for file_name in src_files: full_file_name = (os.path.join(dir_input, file_name)) if (os.path.isfile(full_file_name)): print ('copying...' + full_file_name) shutil.copy(full_file_name, r'C:\Dir')) else: print ('Finished!')

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  • How to properly encode "[" and "]" in queries using Apache HttpClient?

    - by Jason Nichols
    I've got a GET method that looks like the following: GetMethod method = new GetMethod("http://host/path/?key=[\"item\",\"item\"]"); Such a path works just fine when typed directly into a browser, but the above line when run causes an IllegalArgumentException : Invalid URI. I've looked at using the URIUtils class, but without success. Is there a way to automatically encode this (or to add a query string onto the URL without causing HttpClient to barf?).

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  • XCode CoreData files not found/opening

    - by jAmi
    Hello, I am using the Xcode 3.1.4 that means SDK 3.1.2 The problem is that I cannot open .xcdatamodel (Core Data) file and I don't even get the Data Model option in Design Menu bar. When ever I double click and try to open the file, XCode gives me an error saying that it cannot find the file at (my project's path).Perhaps it was moved or deleted? , but the file exists at the same path. Please help me out as I haven't upgraded my system to Snow Leopard so cant use SDK 3.2 Regards jAmi

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  • How to create symbolic links in Windows?

    - by guillermooo
    Related: In .NET, how do I Create a Junction in NTFS, as opposed to a Symlink? I've tried Winbolic (Windows XP), but i can't get it to work the way I want. Am I wrong here?: If I create a symbolic link within a folder in my %PATH%, the referenced directory should work as if it had actually been added to %PATH%, right?

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  • How do I reflect over the members of dynamic object?

    - by Flatliner DOA
    I need to get a dictionary of properties and their values from an object declared with the dynamic keyword in .NET 4? It seems using reflection for this will not work. Example: dynamic s = new ExpandoObject(); s.Path = "/Home"; s.Name = "Home"; // How do I enumerate the Path and Name properties and get their values? IDictionary<string, object> propertyValues = ???

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  • HOWTO use UIWebView to display a downloaded file later?

    - by Roboprog
    How do I format an NSURL (what path, or path generator function) so that I can display a downloaded local file (NOT part of the application NSBundle) for use offline? The idea is to snag an HTML file, clean it up and stash it in the iFoo application specific storage area, then later use UIWebView to display it. Next, I go off to RTFM about working with files on iFoo (iPhone / iPad) in general, but any fast-start tips are appreciated.

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  • One-liner javascript to collect values from object graph?

    - by Kevin Pauli
    Given the following object graph: { "children": [ { "child": { "pets": [ { "pet": { "name": "fido" } }, { "pet": { "name": "fluffy" } } ] } }, { "child": { "pets": [ { "pet": { "name": "spike" } } ] } } ] } What would be a nice one-liner (or two) to collect the names of my grandchildren's pets? The result should be ["fido", "fluffy", "spike"] I don't want to write custom methods for this... I'm looking for something like the way jQuery works in selecting dom nodes, where you can just give it a CSS-like path and it collects them up for you. I would expect the expression path to look something like "children child pets pet name"

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  • Issue with binding Collection type of dependency property in style

    - by user344101
    Hi, I have a customcontrol exposing a Dependency property of type ObservableCollection. When i bind this properrty directly as part ofthe control's mark up in hte containing control everythihng works fine /< temp:EnhancedTextBox CollectionProperty="{Binding Path=MyCollection, Mode=TwoWay}"/ But when i try to do the binding in the style created for the control it fails, /< Style x:Key="abc2" TargetType="{x:Type temp:EnhancedTextBox}" <Setter Property="CollectionProperty" Value="{Binding Path=MyCollection, Mode=TwoWay}"/> Please help !!!!! Thanks

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  • WFP Textblock in Listbox not clipping properly

    - by Tobias Funke
    Her's what I want: A listbox whose items consist of a stackpanel with two textblocks. The textblocks need to support wrapping, the listbox should not expand, and there should be no horizontal scrollbar. Here's the code I have so far. Copy and paste it into XamlPad and you'll see what I'm talking about. <ListBox Height="300" Width="300" x:Name="tvShows"> <ListBox.Items> <ListBoxItem> <StackPanel> <TextBlock Width="{Binding ElementName=tvShows, Path=ActualWidth}" TextWrapping="Wrap">Lost is an American live-action television series. It follows the lives of plane crash survivors on a mysterious tropical island.</TextBlock> <TextBlock Width="{Binding ElementName=tvShows, Path=ActualWidth}" TextWrapping="Wrap">Lost is an American live-action television series. It follows the lives of plane crash survivors on a mysterious tropical island.</TextBlock> </StackPanel> </ListBoxItem> <ListBoxItem> <StackPanel> <TextBlock Width="{Binding ElementName=tvShows, Path=ActualWidth}" TextWrapping="Wrap">Lost is an American live-action television series. It follows the lives of plane crash survivors on a mysterious tropical island.</TextBlock> <TextBlock Width="{Binding ElementName=tvShows, Path=ActualWidth}" TextWrapping="Wrap">Lost is an American live-action television series. It follows the lives of plane crash survivors on a mysterious tropical island.</TextBlock> </StackPanel> </ListBoxItem> </ListBox.Items> </ListBox> This seems to be doing the job of keeping the textblocks from growing, but there's one problem. The textblocks seem to be slightly larger than the listbox, causing the horizontal scrollbar to appear. This is strange because their widths are bound to the lisbox's ActualWidth. Also, if you add a few more items to the listbox (just cut and paste in XamlPad) causing the vertical scrollbar to appear, the width of the textblocks do not resize to the vertical scrollbar. How do I keep the textblocks inside the listbox, with or without the vertical scrollbar?

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  • Absolute UriSource of a Resource image

    - by Louis Rhys
    I have a WPF project. If I store image in {ProjectRoot}\Images\image.png, and compile it as Resource then I can access it from a xaml (this xaml is located at Root) as BitmapImage by BitmapImage UriSource="Images/image.png". But if I move the xaml to another folder, say {ProjectRoot}\Xamls, now I have to use BitmapImage UriSource="../Images/image.png". Is there a way to specify an absolute project path, so that I can refer to them with the same path regardless of the location of the xaml?

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  • Ant: Create directory containing file if it doesn't already exist?

    - by Benny
    Basically, I get a path like "C:\test\subfolder1\subfolder2\subfolder3\myfile.txt", but it's possible that subfolders 1-3 don't exist already, which means I'd get an exception if I try to write to the file. Is there a way to create the directory structure the target file is in, either by using some task that creates the structure when it outputs to the file and then deleting the file, or by parsing the directory part of the path and using the mkdir task first? Any help is appreciated. Thanks, B.J.

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  • How can I show the contents of a file at a specific state of a git repo?

    - by richcollins
    I want to show the contents of a file given by a path at a specific state of a git repo. I unsuccessfully tried this: git show f825334150cd4bc8f46656b2daa8fa1e92f7796d:Katana/source/Git/GitLocalBranch.h fatal: ambiguous argument 'f825334150cd4bc8f46656b2daa8fa1e92f7796d:Katana/source/Git/GitLocalBranch.h': unknown revision or path not in the working tree. Use '--' to separate paths from revisions The commit in question didn't modify the file specified. How can I show the contents of a file at a given state (specified by a commit hash) regardless of the involvement of the file in the commit?

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