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• Silverlight Question: How can I find the DataTemplate corresponding to an item in a ListBox

  - by morpheus

  I have two classes A & B, and a listbox. I assign listBox.ItemsSource equal to a collection of objects of type A. The listbox items are visualized using silverlight data templating, see http://msdn.microsoft.com/en-us/library/system.windows.datatemplate.aspx and http://www.codeproject.com/KB/WPF/UserControlAsDataTemplate.aspx for example. The listbox.ItemTemplate is a DataTemplate that uses class B to visualize the listbox items. Now, in my code-behind, inside any method of class B, if I do this.DataContext, it points to an object of type A. Thus, given an object of type B, I can find the corresponding object of type A. So far so good. My question is, given an object of type A, how can I navigate to the corresponding object of type B? Is this even possible in SL?

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• Question About id and Delegate Usage in Obj-C

  - by Stunner

  Ey guys, I am wondering what the following line of code is doing: @property (assign, nonatomic) id <CoursePlannerDelegate> delegate; Namely I am wondering about this portion of the line: id <CoursePlannerDelegate> delegate; It also shows up in other places: @interface CategoryAddViewController : UIViewController { UITextField *nameField, *weightField; double maxWeight; //The maximum weight that can be allocated to this Category (max value of 100) id <CategoryAddDelegate> delegate; //A Course Planner TVC } Any help appreciated, thanks in advance!

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• How to use LDAP for authentication in Tomcat with Custom Authorization

  - by djc4

  Hello, I'm using JNDIRealm with Tomcat for authentication, which at the moment works fine. However, we do not store any roles in the LDAP, so all authenticated users are not returning any roles. This sends user's to an HTTP 401 failed authorization page. I'd like to assign an "Admin" role to any and all user's who authenticate successfully. Here is my fragment from my web.xml file. SecurityConstraint Resource Resource *.jsp GET POST Admin FORM login.jsp loginError.jsp Admin Should I be using a JAASRealm with custom LoginModule? After the realm calls the authenticate() method and returns success, should I override another method to explicitly set the RolePrincipal to "Admin" so that authorization succeeds? Please help! Thanks, Andy

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• Error while assigning the data to dataGrid Dataprovided

  - by sudeep kumar

  Hi , I was trying to acces the datagrid at runtime and want to assign the data to it like public function getGridData(reportsArray:ArrayCollection):void{ reportData = reportsArray; trace(" The length of the datagrid is "+reportData.length); graphDataGrid.dataProvider = reportData; invalidateDisplayList(); } but I was getting this error TypeError: Error #1009: Cannot access a property or method of a null object reference. at views.charts::ComparisonAnalysis/createDataGrid()[C:\FlexProjects\AdvancedMetering\views\charts\ComparisonAnalysis.mxml:32] at views.charts::ComparisonAnalysis/getGridData()[C:\FlexProjects\AdvancedMetering\views\charts\ComparisonAnalysis.mxml:26] at components.CustomReport::CustomReportSelector/getResultHandler()[C:\FlexProjects\AdvancedMetering\components\CustomReport\CustomReportSelector.mxml:147] at components.CustomReport::CustomReportSelector/__reportingBase_dataGridResultChanged()[C:\FlexProjects\AdvancedMetering\components\CustomReport\CustomReportSelector.mxml:203] at flash.events::EventDispatcher/dispatchEventFunction() at flash.events::EventDispatcher/dispatchEvent() at mx.core::UIComponent/dispatchEvent()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\UIComponent.as:9298] at components.CustomReport::ReportingBase/getDataFromServer()[C:\FlexProjects\AdvancedMetering\components\CustomReport\ReportingBase.as:98] at components.CustomReport::ReportingBase/getResults()[C:\FlexProjects\AdvancedMetering\components\CustomReport\ReportingBase.as:78] at components.CustomReport::CustomReportSelector/getGraphData()[C:\FlexProjects\AdvancedMetering\components\CustomReport\CustomReportScripts.as:20] at components.CustomReport::CustomReportSelector/__getGraphandGridData_click()[C:\FlexProjects\AdvancedMetering\components\CustomReport\CustomReportSelector.mxml:248] Can someboedy please let me know what the problem it looks like the datagrid is not instantiated at this ppoint of time Sudee[

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• Why can't a bind linux service to the loop-back only?

  - by Jon Trauntvein

  I am writing a server application that will provide a service on an ephemeral port that I only want accessible on the loopback interface. In order to do this, I am writing code like the following: struct sockaddr_in bind_addr; memset(&bind_addr,0,sizeof(bind_addr)); bind_addr.sin_family = AF_INET; bind_addr.sin_port = 0; bind_addr.sin_addr.s_addr = htonl(inet_addr("127.0.0.1")); rcd = ::bind( socket_handle, reinterpret_cast<struct sockaddr *>(&bind_addr), sizeof(bind_addr)); The return value for this call to bind() is -1 and the value of errno is 99 (Cannot assign requested address). Is this failing because inet_addr() already returns its result in network order or is there some other reason?

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• Get all descendants types of base class

  - by user1260827

  I have a base class called BaseEvent and several descendants classes: public class BaseEvent { // the some properties ... } [MapInheritance(MapInheritanceType.ParentTable)] public class Film : BaseEvent { // the some properties ... } [MapInheritance(MapInheritanceType.ParentTable)] public class Concert : BaseEvent { // the some properties ... } I have a code which create the BaseEvent instance at runtime: BaseEvent event = new BaseEvent(); //assign values for a properties ... baseEvent.XPObjectType = Database.XPObjectTypes.SingleOrDefault(t => t.TypeName == "MyApp.Module.BO.Events.BaseEvent"); Now, this event will be shows in BaseEvent list view. I want to do the following: when a user click Edit button then show in list view lookup field with all descendants types. And when user saves record change ObjectType to selected value. How can I do this? Thanks. PS. this is asp.net app.

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• Three boolean values saved in one tinyint

  - by Casper

  Hello, probably a simple question but I seem to be suffering from programmer's block. :) I have three boolean values: A, B, and C. I would like to save the state combination as an unsigned tinyint (max 255) into a database and be able to derive the states from the saved integer. Even though there are only a limited number of combinations, I would like to avoid hard-coding each state combination to a specific value (something like if A=true and B=true has the value 1). I tried to assign values to the variables so (A=1, B=2, C=3) and then adding, but I can't differentiate between A and B being true from i.e. only C being true. I am stumped but pretty sure that it is possible. Thanks

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• How to fill a section within c++ string?

  - by stacker

  Having a string of whitespaces: string *str = new string(); str->resize(width,' '); I'd like to fill length chars at a position. In C it would look like memset(&str[pos],'#', length ); How can i achieve this with c++ string, I tried string& assign( const string& str, size_type index, size_type len ); but this seems to truncat the original string. Is there an easy C++ way to do this? Thanks.

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• Cast enum to integer

  - by Shanish

  I have a enum class called Gender and I have values in this like public enum GENDER { MALE = 1, FAMALE = 2, OTHERS = 3, } and in my business object I just created a property for this like public GENDER Gender { get { return gender; } set { gender = value; } } in my database its in type integer. For this I tried to assign the Gender value in the add function by its name Gender. but its showing error. Is it possible to cast the enum to integer so that it'll get the value automatically. can anyone help me out here....

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• How would I initialize these two lists so that modifying one doesn't modify the other?

  - by Brandon

  I'm aware of why this is happening, but is there any way to do this without having to implement ICloneable or a Copy() method? Preferably .net 2.0, but 3.5 is fine if it is necessary. Essentially I'm trying to implement an undo method. In most cases I can just perform the reverse action in the Undo(), but for others that is not possible. So I want to keep two lists. One for the list of items that I will be modifying, and one for the original, unmodified list of items. This way if I need to do an undo, I just delete the modified items and replace them with the originals. Most of the ways I've tried to assign the _originalItems variable doesn't work, so what would I need to do? public MyClass(List<SelectedItems> selectedItems) { _selectedItems = new List<SelectedItems>(selectedItems); _originalItems = ?? }

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• InfoPath Getting SharePoint Group Information

  - by anon

  I have an InfoPath form embedded in an aspx page on a SharePoint site. How do I bind the SharePoint user groups to a drop-down list on my form? What I've tried so far is to create a data connection to a web service (method GetGroupCollectionFromWeb) to pull the data. Next, I open the list box properties, select "Look up values from an external data source", select the data source, assign the entries, and I get the following error: "You must select a repeating group or field." What I don't understand is that since the method I am calling is called GetGroupCollectionFromWeb, isn't the return value a collection? And aren't collections repeating by definition? What am I missing, and is there a workaround? Thank you.

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• Grails Unique Constraint for Groups

  - by WaZ

  Hi there, I have the following requirement I have 3 domains namely: class Product { String productName static constraints = { productName(unique:true,blank:false) } class SubType { String subTypeName static constraints = { subTypeName(unique:true,blank:false) } String toString() { "${subTypeName}" } } class CLType { String TypeName static belongsTo = Car static hasMany = [car:Cars] static constraints = { } String toString() { "${TypeName}" } class CLines implements Serializable { Dealer dealer CLType clType SubType subType Product product static constraints = { dealer(nullable:false,blank:false,unique:['subType','product','clType']) clType(blank:false,nullable:false) subType(nullable:true) product(nullable:true) } } I want to achieve this combination: A user can assign dealer a CLType. But cannot have duplicates. As an example consider this scenario Please let me know what to mention in my unqiue constraint to make this possible? Thanks, Much Appreciated.

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• File::Find and $_ in nested subroutines.

  - by zedoo

  When running the following code, the filenames of all files below C:\Test are printed. Why doesn't it print just Hello (n times, depending on how many files are processed)? Does this imply that I cannot rely on shift to reliably assign to $_? Imagine a coworker implements the wtf function and doesn't know that it's called from a File::Find wanted sub. I run this code with Strawberry Perl 5.12 use strict; use warnings; use File::Find; find(\&wanted, "C:\\test"); sub wanted{ wtf("Hello"); } sub wtf { shift; print; #expecting Hello }

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• Assigning unsigned char* buffer to a string

  - by CPPChase

  This question might be asked before but I couldn't find exactly what I need. My problem is, I have a buffer loaded by data downloaded from a webservice. The buffer is in unsigned char* form in which there is no '\0' at the end. Then I have a poco xml parser needs a string. I tried assigning it to string but now I realized it would cause problem such as leaking. here is the code: DOMParser::DOMParser(unsigned char* consatData, int consatDataSize, unsigned char* lagData, int lagDataSize) { Poco::XML::DOMParser parser; std::string consat; consat.assign((const char*) consatData, consatDataSize); pDoc = parser.parseString(consat); ParseConsat(); } Poco xml parser does have a ParseMemory which need a const char* and size of data but for some reason it just gives me segmentation fault. So I think it's safer to turn it to string. Thanks in advance.

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• window.location call popup up empty dialog on safari

  - by memical

  Hi, on a web page i am trying to redirect the browser to another page on the same site. the code is very simple for that: window.location = "/path1/path2" on safari - both windows as well as mac - a message box containing only the text "http://domain.com" comes up. I have tried different ways of specifying this: location.href, windows.assign(...) ... and the all have the same behavior. Did any of you see this? and do you have a solution for this? Thanks.

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• User-customizable rails authorization

  - by neutrino

  Hello everyone, Seems there is an abundance of popular declarative-style authorization plugins, which allow you to somehow state in the code that, e.g., this controller action can be accessed by users with such-and-such roles. But what if I need a more dynamic scheme. I want to have an admin area, with a list of all authorizable actions and an ability to assign permissions on actions from the UI. I have ideas how to implement it from scratch, like to define a model corresponding to a controller and/or action and store the permissions via normal associations. Just wonder if there are any ready solutions to this. Thanks a lot

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• Why does casting a NaN to a long yield a valid result?

  - by brainimus

  In the sample code below I am dividing by zero which when I step through it with the debugger the (dividend / divisor) yields an Infinity or NaN (if the divisor is zero). When I cast this result to a long I get a valid result, usually something like -9223372036854775808. Why is this cast valid? Why doesn't it stop executing (throw an exception for example) rather than assign an arbitrary value? double divisor = 0; double dividend = 7; long result = (long)(dividend / divisor);

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• Check boxes for a has_many and belongs_to association.

  - by Thomas

  I have a has_many and belongs_to association. class Link < ActiveRecord::Base has_and_belongs_to_many :categories belongs_to :property end class Property < ActiveRecord::Base has_many :links end In the index and show I have <%= link.property.name %> and it will show the Property that I assigned to the link with the console just fine. I have a problem with figuring out how to show check boxes in the _form that assign a property to the link (a drop down would work as well). It seems everyone who has had this question before has ether a has_many :through or a HABTM relationship and I can't seem to adapt their answers.

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• How to declare and use the name of a function from a json object?

  - by Sebastian

  Hello, I have a json object collection of geo locations that I build in the server. Each of those objects has two properties: "marker" and "onClick". Marker is for storing a Google Maps marker object and the onClick stores the name of the function to be called when that marker is clicked on the map. When I'm pushing the location objects into an array using javascript in the client side, I create the markers and assign them to each location object within the array. My problem is that when I bind the marker with the onClick property, the function won't be found in the DOM and get an error. Is there a way to declare a property in a json object for using it on an event binding? Hope I could explain it clearly, if not, please let me know. Thanks!

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• Assigning function within function object without invoking the function itself.

  - by webzide

  Dear experts, I am trying to assign an function within an function object property without actually invoking then function itself. for instance, I have the following function object class definition function objectOne(name, value, id){ this.name=name; this.value=value; this.id=id; this.methodOne=methodFunction(this); } the last line this.methodOne=methodFunction(this); I want to pass the current object to the function but at the same time i don't want to execute the function right now. But if I do it this way without the bracket this.methodOne=methodFunction then the argument of this object would not be passed as a parameter to the function. Is there a way to work through this. Thank you in advance

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• How can I remove the head of a main function?

  - by Nathan McDavitt-Van Fleet

  I am trying to move some code from a seperate binary and have it inside my main program. Unfortunately I can't mimic the initialization variables for the main function. How can I create argc and argv by hand? Can someone give me some example assignments. since it looks like this: int main(int argc, char *argv[]) I figured I could assign them like this: int argc=1; char *argv[0]="Example"; But it doesn't work. Can anyone tell me how this might be done?

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• How do I modify a string printed by a script?

  - by Liso22

  I'm having problems with wordpress mishandling accented characters, or maybe the problem is with some plugin. Whichever the case I need to "translate" some strings, removing accents which i do with: $value = strtr($value, $trans); I really need to change this string which renders the user's location but it's printed with a script so I have no idea how to do it: <script language="javascript"> document.write('' + geoip_city() +''); </script> Is there a way to assign it's result to a php value beforehand or something? Maybe removing the accents with a script. I really need to modify it, how could I manage to do it? Thanks

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• add navigation buttons with highlight to jQuery Cycle

  - by JJ Nold

  I am currently using jQuery cycle to display featured projects. I currently have the next and prev buttons setup, I also have four rounded buttons in between. I would like them to function as both a link to the corresponding slide as well as add a class to the button who's slide is currently active. I have the nav setup and the active class setup I just need the jQuery. You can see the code at http://jjnold.com/dev in the main slider at the top. I was thinking it's probably something like this to assign the class but I'm not sure how to link to the corresponding slide and have them work together. Any help is greatly appreciated. $('.featuredNavInt a').click(function() { $('.featuredNavInt a').removeClass('active'); $(this).addClass('active'); });

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• Database migration

  - by graham.reeds

  We are migrating a client's own database schema to our own (both SQL-Server). Most of the mappings from their schema to ours have been indentified and rules been agreed on if the columns don't exactly align (default values etc.) Previously, depending on who was assigned the task, this has been done either with a mixture of sql scripts or one-off vb apps. I was thinking there must be a application (commercial or otherwise) where you can assign these mappings/rules and have it stream the data across. Surely the setting up and configuration of this tool would be less than the creation of ad-hoc scripts... Is there an app? Apart from the obvious 'be careful' any tips to mitigate the stress of a non-DBA porting one schema to another?

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• rspec mocking object property assignment

  - by charlielee

  I have a rspec mocked object, a value is assign to is property. I am struggleing to have that expectation met in my rspec test. Just wondering what the sytax is? The code: def create @new_campaign = AdCampaign.new(params[:new_campaign]) @new_campaign.creationDate = "#{Time.now.year}/#{Time.now.mon}/#{Time.now.day}" if @new_campaign.save flash[:status] = "Success" else flash[:status] = "Failed" end end The test it "should able to create new campaign when form is submitted" do campaign_model = mock_model(AdCampaign) AdCampaign.should_receive(:new).with(params[:new_campaign]).and_return(campaign_model) campaign_model.should_receive(:creationDate).with("#{Time.now.year}/#{Time.now.mon}/#{Time.now.day}")campaign_model.should_receive(:save).and_return(true) post :create flash[:status].should == 'Success' response.should render_template('create') end The problem is I am getting this error: Spec::Mocks::MockExpectationError in 'CampaignController new campaigns should able to create new campaign when form is submitted' Mock "AdCampaign_1002" received unexpected message :creationDate= with ("2010/5/7") So how do i set a expectation for object property assignment? Thanks

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