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  • Is it possible to return a SiteMap as a JsonResult?

    - by Paul Suart
    I've got a very simple Action on my Controller that's attempting to return my XmlSiteMap as a JsonResult: public ActionResult Index() { var nodes = SiteMap.Provider.RootNode; return new JsonResult() { Data = nodes, JsonRequestBehavior = JsonRequestBehavior.AllowGet }; } However, when I call the Action, an InvalidOperationException is thrown: "A circular reference was detected while serializing an object of type 'System.Web.SiteMapNode'." Is there a way to Json serialize a SiteMap, or indeed any object that has children of the same type?

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  • Using Guice with circular dependencies

    - by Yury Litvinov
    Consider this simple example. Class A { B b; A() { this.b = new B(this); } } In this example instance A knows about instance B, and instance B knows about instance A. My question is: how to instantiate instance A with Guice, i.e. how to make Guice take care of this complex circle dependencies?

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  • Proper way to resignFirstResponder when a UITableView is touched?

    - by Topher Fangio
    Hello all, I have a pretty simple UITableView who's cells contain UITextFields and I need to be able to call resignFirstResponder to hide the keyboard whenever a user touches the UITableView outside of one of the cells. I have read this question/answer but it seems like a very rudimentary way to achieve this. I have read about a way to do it by converting the UITableView to a UIControl so that you can connect the TouchDown event. Does anybody know the standard or preferred way to achieve this functionality?

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  • Mathematica: get number of arguments passed to a function?

    - by dbjohn
    How do I get the number of arguments passed to a function, such as Plus[2,3,4,5] has 4 arguments passed to it. I was thinking it may involve the use of the function Length and getting the arguments into a list. The intention is to iterate an operation based on the number of arguments for a function. There is probably a simple solution or function but I haven't come across it yet. Any other ways or suggestions are welcome as well?

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  • Polymorphic :has_many, :through as module in Rails 3.1 plugin

    - by JohnMetta
    I've search everywhere for a pointer to this, but can't find one. Basically, I want to do what everyone else wants to do when they create a polymorphic relationship in a :has_many, :through way… but I want to do it in a module. I keep getting stuck and think I must be overlooking something simple. To wit: module ActsPermissive module PermissiveUser def self.included(base) base.extend ClassMethods end module ClassMethods def acts_permissive has_many :ownables has_many :owned_circles, :through => :ownables end end end class PermissiveCircle < ActiveRecord::Base belongs_to :ownable, :polymorphic => true end end With a migration that looks like this: create_table :permissive_circles do |t| t.string :ownable_type t.integer :ownable_id t.timestamps end The idea, of course, is that whatever loads acts_permissive will be able to have a list of circles that it owns. For simple tests, I have it "should have a list of circles" do user = Factory :user user.owned_circles.should be_an_instance_of Array end which fails with: Failure/Error: @user.circles.should be_an_instance_of Array NameError: uninitialized constant User::Ownable I've tried: using :class_name => 'ActsPermissive::PermissiveCircle' on the has_many :ownables line, which fails with: Failure/Error: @user.circles.should be_an_instance_of Array ActiveRecord::HasManyThroughSourceAssociationNotFoundError: Could not find the source association(s) :owned_circle or :owned_circles in model ActsPermissive::PermissiveCircle. Try 'has_many :owned_circles, :through => :ownables, :source => <name>'. Is it one of :ownable? while following the suggestion and setting :source => :ownable fails with Failure/Error: @user.circles.should be_an_instance_of Array ActiveRecord::HasManyThroughAssociationPolymorphicSourceError: Cannot have a has_many :through association 'User#owned_circles' on the polymorphic object 'Ownable#ownable' Which seems to suggest that doing things with a non-polymorphic-through is necessary. So I added a circle_owner class similar to the setup here: module ActsPermissive class CircleOwner < ActiveRecord::Base belongs_to :permissive_circle belongs_to :ownable, :polymorphic => true end module PermissiveUser def self.included(base) base.extend ClassMethods end module ClassMethods def acts_permissive has_many :circle_owners, :as => :ownable has_many :circles, :through => :circle_owners, :source => :ownable, :class_name => 'ActsPermissive::PermissiveCircle' end end class PermissiveCircle < ActiveRecord::Base has_many :circle_owners end end With a migration: create_table :permissive_circles do |t| t.string :name t.string :guid t.timestamps end create_table :circle_owner do |t| t.string :ownable_type t.string :ownable_id t.integer :permissive_circle_id end which still fails with: Failure/Error: @user.circles.should be_an_instance_of Array NameError: uninitialized constant User::CircleOwner Which brings us back to the beginning. How can I do what seems to be a rather common polymorphic :has_many, :through on a module? Alternatively, is there a good way to allow an object to be collected by arbitrary objects in a similar way that will work with a module?

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  • Basic xhtml/css models ?

    - by Skeptic
    Hi, I need to produce a very simple website (no dynamic-content, 2-columns, header&footer) and I have a basic knowledge of xhtml/css. So I could probably come with something from scratch, but it would probably won't work in "all" browsers. I've done some googling, but it's difficult for me to evaluate the quality of the "free templates" advertized all over the place. So is there any web developer here that has good references or even such models/templates ?

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  • iPhone - didPopItem ? Is this supposed to work?

    - by Chris
    I have a simple UITableView setup. I am trying to use - (void)navigationBar:(UINavigationBar *)navigationBar didPopItem:(UINavigationItem *)item I put a NSLog inside this method, but it is apparently not getting called when I "pop" back to the screen. I am not finding much information about this function, has it been replaced?

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  • How to compare arrays in Perl?

    - by devtech
    I have two arrays A & B. I want to do a compare among the elements of the two arrays. my @a = qw"abc def efg ghy klm ghn"; my @b = qw"def ghy jgk lom com klm"; If any element matches then set a flag. Is there any simple way to do this? Please advise.

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  • Height of Text in Flex

    - by kevin
    How can you get the height of the Text component that's been created dynamically from ActionScript. For instance, if you have something like: var temp:Text = new Text; temp.width = 50; temp.text = "Simple text"; how to get height of temp?

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  • How can I pin a div in my sidebar column to the bottom?

    - by vg1890
    I have a simple two column layout with a footer at the bottom. When the content in the sidebar is taller than the content in the main column, everything looks great. But when the height of the main column is greater than the sidebar, I need the sidebar to grow to the same height as the main column and for the last <div> in the sidebar to be pinned to the very bottom. Here's my sample code: http://jsfiddle.net/mqnML/1/

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  • Hide the Emacs echo area when not in use

    - by Baldur
    The echo area is the line at the bottom of Emacs below the mode line: ~ ~ | | +-----------------------+ |-U:--- mode-line | +-----------------------+ | M-x echo-area | +-----------------------+ Now the mode line is highly customizable while the echo area is more rigid (and unused a lot of the time). The question is pretty simple: is it possible to hide the echo area during inactivity and redisplay it once it needs your attention: ~ ~ ~ ~ | | | | | | +-----------------------+ | | |-U:--- mode-line | +-----------------------+ +-----------------------+ |-U:--- mode-line | | M-x echo-area | +-----------------------+ +-----------------------+ Inactive Active This is similar to the way Google Chrome displays URLs when you hover your mose over a link and the Firefox addon Pentadactyl where the command-line is hidden by default.

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  • Change texture opacity in OpenGL

    - by zoul
    Hello! This is hopefully a simple question: I have an OpenGL texture and would like to be able to change its opacity, how do I do that? The texture already has an alpha channel and blending works fine, but I want to be able to decrease the opacity of the whole texture, to fade it into the background. I have fiddled with glBlendFunc, but with no luck – it seems that I would need something like GL_SRC_ALPHA_MINUS_CONSTANT, which is not available. I am working on iPhone, with OpenGL ES.

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  • Reload Android application in emulator without restarting emulator in Eclipse?

    - by Tai Squared
    Is there a way to reload an Android application in the emulator without closing the emulator, saving any code changes, and running the emulator again? If I make even a simple change to the layout, it takes about 30 seconds by time I run it in Eclipse and Android "boots", and I can unlock the emulator to run the application. Is there any way to shorten this time when making changes, or is it something I just have to deal with?

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  • Can I pull the next element from within a Perl foreach loop?

    - by Thilo
    Can I do something like the following in Perl? foreach (@tokens) { if (/foo/){ # simple case, I can act on the current token alone # do something next; } if (/bar/) { # now I need the next token, too # I want to read/consume it, advancing the iterator, so that # the next loop iteration will not also see it my $nextToken = ..... # do something next; } }

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  • How to translate a config.ini file into C#.NET objects

    - by JACK IN THE CRACK
    config.ini: [globalloads] plugin.SWPlugin = 1 plugin.SWPlugin.params.1 = true plugin.SWPlugin.params.2 = 10 [testz : globballoads] plugin.SWPlugin.params.2 = 20 Simple enough? // load testz config and programmatically create this equivalent code: SWPluginAbstract p = new SWPlugin(true, 20); If a different config.ini setup is needed to do that, it's not a problem...

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  • How to merge two pdf doucment as single report in jasper reoprt?

    - by Kumar
    Hi Friends, I am new to jasper report.I can able to create Simple PDF document with Javabean datasource.In my project i have created two separete pdf document with separate javabeandatasource , Now i want to merge that both document into single document.Can anyone tell me how to merge both document into single document using jasper.

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  • Html string reader

    - by Oakcool
    Hi all, I need to load HTML and parse it, I think that it should be something simple, I pass a string with a "HTML" it reads the string in a Dom like object, so I can search and parse the content of the HTML, facilitating scraping and things like that. Do you guys know about any thing like that. Thanks

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  • How to access string[] in xhtml page

    - by Kalpana
    I am having a simple string array in my bean as public String[] colors = new String[]{"red", "blue", "green"}; and trying to display these colors from my xhtml as but I am getting a java.lang.NumberFormatException: For input string: "colors" java.lang.NumberFormatException: For input string: "colors" at java.lang.NumberFormatException.forInputString(NumberFormatException. java:48) at java.lang.Integer.parseInt(Integer.java:447) at java.lang.Integer.parseInt(Integer.java:497) at javax.el.ListELResolver.coerce(ListELResolver.java:166) at javax.el.ListELResolver.getValue(ListELResolver.java:51) at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:54)

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  • How to clear all form fields from code-behind?

    - by Slauma
    HTML has an input button type to reset all fields in a form to their initial state in one step: <input type="reset" ... />. Is there a similar simple way to reset all form fields of an aspx page from code-behind? Or is it necessary to reset all controls one by one with TextBox1.Text=string.Empty, TextBox2.Text=string.Empty, etc. ? Thanks in advance!

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