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• ListSelector applies to the entire list

  - by jax

  I have a simple list with a listselector like so. <ListView android:id="@+id/list" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_below="@+id/round" android:listSelector="#99000000" android:clickable="true" android:cacheColorHint="#00000000" android:background="#00000000"> </ListView> As you can see android:listSelector="#99000000" but the "black alpha" color is applied to the entire list, not the selected item. So this is what I have now but the entire list still turns black ::listview_background.xml <?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_enabled="false" android:state_focused="true" android:drawable="@drawable/list_normal" /> <item android:state_pressed="true" android:drawable="@drawable/list_pressed" /> <item android:state_focused="true" android:drawable="@drawable/list_active" /> </selector> ::colors.xml <resources> <drawable name="list_normal">#96FFFFFF</drawable> <drawable name="list_active">#66000000</drawable> <drawable name="list_pressed">#CA000000</drawable> </resources> ::the xml tag in my list android:listSelector="@drawable/listview_background"

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• help me to parse JSON value using JSONTouch

  - by EquinoX

  I have the following json: http://www.adityaherlambang.me/webservice.php?user=2&num=10&format=json I would like to get all the name in this data by the following code, but it gives an error. How can I fix it? NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding]; NSDictionary *results = [responseString JSONValue]; NSDictionary *users = [results objectForKey:@"users"] objectForKey:@"user"]; for (NSDictionary *user in users){ //NSLog(@"key:%@, value:%@", user, [user objectForKey:user]); NSString *title = [users objectForKey:@"NAME"]; NSLog(@"%@", title); } Error: 2011-01-29 00:18:50.386 NeighborMe[7763:207] -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0xb618840 2011-01-29 00:18:50.388 NeighborMe[7763:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0xb618840' *** Call stack at first throw: ( 0 CoreFoundation 0x027d9b99 __exceptionPreprocess + 185 1 libobjc.A.dylib 0x0292940e objc_exception_throw + 47 2 CoreFoundation 0x027db6ab -[NSObject(NSObject) doesNotRecognizeSelector:] + 187 3 CoreFoundation 0x0274b2b6 ___forwarding___ + 966 4 CoreFoundation 0x0274ae72 _CF_forwarding_prep_0 + 50 5 NeighborMe 0x0000bd75 -[NeighborListViewController connectionDidFinishLoading:] + 226 6 Foundation 0x0007cb96 -[NSURLConnection(NSURLConnectionReallyInternal) sendDidFinishLoading] + 108 7 Foundation 0x0007caef _NSURLConnectionDidFinishLoading + 133 8 CFNetwork 0x02d8d72f _ZN19URLConnectionClient23_clientDidFinishLoadingEPNS_26ClientConnectionEventQueueE + 285 9 CFNetwork 0x02e58fcf _ZN19URLConnectionClient26ClientConnectionEventQueue33processAllEventsAndConsumePayloadEP20XConnectionEventInfoI12XClientEvent18XClientEventParamsEl + 389 10 CFNetwork 0x02e5944b _ZN19URLConnectionClient26ClientConnectionEventQueue33processAllEventsAndConsumePayloadEP20XConnectionEventInfoI12XClientEvent18XClientEventParamsEl + 1537 11 CFNetwork 0x02d82968 _ZN19URLConnectionClient13processEventsEv + 100 12 CFNetwork 0x02d827e5 _ZN17MultiplexerSource7performEv + 251 13 CoreFoundation 0x027bafaf __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15 14 CoreFoundation 0x0271939b __CFRunLoopDoSources0 + 571 15 CoreFoundation 0x02718896 __CFRunLoopRun + 470 16 CoreFoundation 0x02718350 CFRunLoopRunSpecific + 208 17 CoreFoundation 0x02718271 CFRunLoopRunInMode + 97 18 GraphicsServices 0x030b800c GSEventRunModal + 217 19 GraphicsServices 0x030b80d1 GSEventRun + 115 20 UIKit 0x002e9af2 UIApplicationMain + 1160 21 NeighborMe 0x00001c34 main + 102 22 NeighborMe 0x00001bc5 start + 53 23 ??? 0x00000001 0x0 + 1 ) terminate called after throwing an instance of 'NSException' I really just wanted to be able to iterate through the names

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• Java Generics Issue (w/ Spring)

  - by drewzilla

  I think I may be a victim of type erasure but thought I'd check with others here first. I have the requirement to do something like this: public interface FooFactory { public <T extends Bar> Foo<T> createFoo( Class<T> clazz ); } It is perfectly valid to write this code. However, I'm trying to implement this functionality using a Spring BeanFactory and I can't do it. What I'd like to do is this... public class FooFactoryImpl implements BeanFactoryAware { private BeanFactory beanFactory; public <T extends Bar> Foo<T> createFoo( Class<T> clazz ) { return beanFactory.getBean( ????????? ); } public void setBeanFactory( BeanFactory beanFactory ) { this.beanFactory = beanFactory; } } As you can see, I've put in ???????? where I'd like to retrieve a bean of type Foo<T>, where T extends Bar. However, it is not possible to derive a Class object of type Foo<T> and so I assume what I'm trying to do is impossible? Anyone else see a way round this or an alternative way of implementing what I'm trying to do? Thanks, Andrew

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• Changing UIViews during UIInterfaceOrientation on iPad

  - by FreeAppl3

  I am trying to change views on rotation because my views have to be significantly different from portrait to landscape. Now the code I am using works once then the app freezes when trying to rotate back. Either direction does not make a difference. For example: If I am in Landscape and rotate to portrait everything works great until I rotate back to landscape then it freezes and does absolutely nothing. Here is the code I am using to achieve this In my "viewDidLoad" method [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didRotate:) name:UIDeviceOrientationDidChangeNotification object:nil]; Then I call this for the rotation: - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { // Return YES for supported orientations return YES; } - (void)didRotate:(NSNotification *)notification { UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation]; if ((orientation == UIDeviceOrientationLandscapeLeft) || (orientation == UIDeviceOrientationLandscapeLeft)) { // present the other viewController, it's only viewable in landscape [self.view addSubview:landScapeView]; } if ((orientation == UIDeviceOrientationLandscapeRight) || (orientation == UIDeviceOrientationLandscapeRight)) { // present the other viewController, it's only viewable in landscape [self.view addSubview:landScapeView]; } else if ((orientation == UIDeviceOrientationPortrait || (orientation == UIDeviceOrientationPortrait)) { // get rid of the landscape controller [self.view addSubview:portrait]; } else if ((orientation == UIDeviceOrientationPortraitUpsideDown || (orientation == UIDeviceOrientationPortraitUpsideDown)) { // get rid of the landscape controller [self.view addSubview:portrait]; } }

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• Adding variably named fields to Python classes

  - by Carson Myers

  I have a python class, and I need to add an arbitrary number of arbitrarily long lists to it. The names of the lists I need to add are also arbitrary. For example, in PHP, I would do this: class MyClass { } $c = new MyClass(); $n = "hello" $c.$n = array(1, 2, 3); How do I do this in Python? I'm also wondering if this is a reasonable thing to do. The alternative would be to create a dict of lists in the class, but since the number and size of the lists is arbitrary, I was worried there might be a performance hit from this. If you are wondering what I'm trying to accomplish, I'm writing a super-lightweight script interpreter. The interpreter walks through a human-written list and creates some kind of byte-code. The byte-code of each function will be stored as a list named after the function in an "app" class. I'm curious to hear any other suggestions on how to do this as well.

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• What is a better, cleaner way of using List<T>

  - by Tim Meers

  I'm looking to implement a few nicer ways to use List in a couple of apps I'm working on. My current implementation looks like this. MyPage.aspx.cs protected void Page_Load(object sender, EventArgs e) { BLL.PostCollection oPost = new BLL.PostCollection(); oPost.OpenRecent(); rptPosts.DataSource = oArt; rptPosts.DataBind(); } BLL Class(s) public class Post { public int PostId { get; set; } public string PostTitle { get; set; } public string PostContent { get; set; } public string PostCreatedDate { get; set; } public void OpenRecentInitFromRow(DataRow row) { this.PostId = (int) row["id"]; this.PostTitle = (string) row["title"]; this.PostContent = (string) row["content"]; this.PostCreatedDate = (DateTime) row["createddate"]; } } public class PostCollection : List<Post> { public void OpenRecent() { DataSet ds = DbProvider.Instance().Post_ListRecent(); foreach (DataRow row in ds.Tables[0].Rows) { Post oPost = new Post(); oPost.OpenRecentInitFromRow(row); Add(oPost); } } } Now while this is working all well and good, I'm just wondering if there is any way to improve it, and just make it cleaner that having to use the two different classes do to something I think can happen in just one class or using an interface.

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• Use jquery ':contains' to find specific javascript within a span

  - by Rob

  This is my first time here, I hope that this is clear. So i will have code similar to this this. <span class="mediaSource ui-draggable" id="purchsePlay7915504"> <a href="" onclick="return popup_window(this, 'MediaView', 850, 680)" class="control" enter code hereid="GenericLink"></a> <img id="Any_71" alt="Media Source" src="images/9672web.gif" class="mediaStationIcons mediaWin"/> <img class="player" alt="Media Source" src="images/playmedia.gif" style="display: none;"/> </span> The href portion is generated on the backend, and I have no access to it. I need to modify some existing jquery code to do something based on what the 'onclick' function is(there are different ones e.g. popup_window1,popup_window2 etc.) . I tried something like this: $('.segmentLeft span.mediaSource').click(function(){ if ($('span:contains("popup_window")').length > 0) { do something } }); but it does not seem to work.

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• Ruby on rails 2 level model

  - by jony17

  I need some help creating a very simple forum in a existing model. What I want in a Game page, have a mini forum, where is possible create some topics and some comments to this topics. In the beginning I'm only implement topics. This is the error I have: Mysql2::Error: Column 'user_id' cannot be null: INSERT INTO `topics` (`game_id`, `question`, `user_id`) VALUES (1, 'asd', NULL) This is my main model: game.rb class Game < ActiveRecord::Base attr_accessible :name validates :user_id, presence: true validates :name, presence: true, length: { maximum: 50 } belongs_to :user has_many :topics, dependent: :destroy end topic.rb class Topic < ActiveRecord::Base validates_presence_of :question validates_presence_of :game_id attr_accessible :question, :user_id validates :question, length: {maximum: 50}, allow_blank: false belongs_to :game belongs_to :user end topic_controller.rb def create @game = Game.find(params[:game_id]) @topic = @game.topics.create(params[:topic]) @topic.user_id = current_user.id respond_to do |format| if @topic.save format.html { redirect_to @game, notice: 'Topic was successfully created.' } else format.html { render action: "new" } end end end game/show.html.erb <h2>Topics</h2> <% @game.topics.each do |topic| %> <p> <b>Question:</b> <%= topic.question %> </p> <% end %> <h2>Add a topic:</h2> <%= form_for([@game, @game.topics.build]) do |f| %> <div class="field"> <%= f.label :question %><br /> <%= f.text_field :question %> </div> <div class="actions"> <%= f.submit %> </div> <% end %> Thanks ;)

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• ASP.NET Custom Control - Template Allowing Literal Content

  - by Bob Fincheimer

  I want my User Control to be able to have Literal Content inside of it. For Example: <fc:Text runat="server">Please enter your login information:</fc:Text> Currently the code for my user control is: <ParseChildren(True, "Content")> _ Partial Public Class ctrFormText Inherits FormControl Private _content As ArrayList <PersistenceMode(PersistenceMode.InnerDefaultProperty), _ DesignerSerializationVisibility(DesignerSerializationVisibility.Content), _ TemplateInstance(TemplateInstance.Single)> _ Public Property Content() As ArrayList Get If _content Is Nothing Then Return New ArrayList End If Return _content End Get Set(ByVal value As ArrayList) _content = value End Set End Property Protected Overrides Sub CreateChildControls() If _content IsNot Nothing Then ctrChildren.Controls.Clear() For Each i As Control In _content ctrChildren.Controls.Add(i) Next End If MyBase.CreateChildControls() End Sub End Class And when I put text inside this control (like above) i get this error: Parser Error Message: Literal content ('Please enter your login information to access CKMS:') is not allowed within a 'System.Collections.ArrayList'. This control could have other content than just the text, so making the Content property an attribute will not solve my problem. I found in some places that I need to implement a ControlBuilder Class, along with another class that implements IParserAccessor. Anyway I just want my default "Content" property to have all types of controls allowed in it, both literal and actual controls.

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• NoMethodError / undefined method `foobar_path' when using form_for

  - by user1850886

  I'm using form_for to create a chatroom and when I view the page I get the following error: NoMethodError in Chatrooms#new undefined method `chatrooms_path' for #<#<Class:0xa862b94>:0xa5307f0> Here's the code for the view, located in app/views/chatrooms/new.html.erb: <div class="center"> <%= form_for(@chatroom) do |f| %> <%=f.text_field :topic%> <br> <%=f.submit "Start a discussion", class: "btn btn-large btn-primary"%> <% end %> </div> Here's the relevant controller: class ChatroomsController < ApplicationController def new @chatroom = Chatroom.new end def show @chatroom = Chatroom.find(params[:id]) end end If I change the line <%= form_for(@chatroom) do |f| %> to <%= form_for(:chatroom) do |f| %> it works fine. I've searched around for similar questions but none of the solutions have worked for me. Help?

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• How to know the type of an object in a list?

  - by nacho4d

  Hi, I want to know the type of object (or type) I have in my list so I wrote this: void **list; //list of references list = new void * [2]; Foo foo = Foo(); const char *not_table [] = {"tf", "ft", 0 }; list[0] = &foo; list[1] = not_table; if (dynamic_cast<LogicProcessor*>(list[0])) { //ERROR here ;( printf("Foo was found\n"); } if (dynamic_cast<char*> (list[0])) { //ERROR here ;( printf("char was found\n"); } but I get : error: cannot dynamic_cast '* list' (of type 'void*') to type 'class Foo*' (source is not a pointer to class) error: cannot dynamic_cast '* list' (of type 'void*') to type 'char*' (target is not pointer or reference to class) Why is this? what I am doing wrong here? Is dynamic_cast what I should use here? Thanks in advance EDIT: I know above code is much like plain C and surely sucks from the C++ point of view but is just I have the following situation and I was trying something before really implementing it: I have two arrays of length n but both arrays will never have an object at the same index. Hence, or I have array1[i]!=NULL or array2[i]!=NULL. This is obviously a waste of memory so I thought everything would be solved if I could have both kind of objects in a single array of length n. I am looking something like Cocoa's (Objective-C) NSArray where you don't care about the type of the object to be put in. Not knowing the type of the object is not a problem since you can use other method to get the class of a certain later. Is there something like it in c++ (preferably not third party C++ libraries) ? Thanks in advance ;)

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• Implementing IEnumeralbe on Non-Listed Items

  - by Stacey

  I have a class that contains a static number of objects. This class needs to be frequently 'compared' to other classes that will be simple List objects. public partial class Sheet { public Item X{ get; set; } public Item Y{ get; set; } public Item Z{ get; set; } } the items are obviously not going to be "X" "Y" "Z", those are just generic names for example. The problem is that due to the nature of what needs to be done, a List won't work; even though everything in here is going to be of type Item. It is like a checklist of very specific things that has to be tested against in both code and runtime. This works all fine and well; it isn't my issue. My issue is iterating it. For instance I want to do the following... List<Item> UncheckedItems = // Repository Logic Here. UncheckedItems contains all available items; and the CheckedItems is the Sheet class instance. CheckedItems will contain items that were moved from Unchecked to Checked; however due to the nature of the storage system, items moved to Checked CANNOT be REMOVED from Unchecked. I simply want to iterate through "Checked" and remove anything from the list in Unchecked that is already in "Checked". So naturally, that would go like this with a normal list. foreach(Item item in Unchecked) { if( Checked.Contains(item) ) Unchecked.Remove( item ); } But since "Sheet" is not a 'List', I cannot do that. So I wanted to implement IEnumerable so that I could. Any suggestions? I've never implemented IEnumerable directly before and I'm pretty confused as to where to begin.

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• Python, lambda, find minimum

  - by qba

  I have foreach function which calls specified function on every element which it contains. I want to get minimum from thise elements but I have no idea how to write lambda or function or even a class that would manage that. Thanks for every help. I use my foreach function like this: o.foreach( lambda i: i.call() ) or o.foreach( I.call ) I don't like to make a lists or other objects. I want to iterate trough it and find min. I manage to write a class that do the think but there should be some better solution than that: class Min: def __init__(self,i): self.i = i def get_min(self): return self.i def set_val(self,o): if o.val < self.i: self.i = o.val m = Min( xmin ) self.foreach( m.set_val ) xmin = m.get_min() Ok, so I suppose that my .foreach method is non-python idea. I should do my Class iterable because all your solutions are based on lists and then everything will become easier. In C# there would be no problem with lambda function like that, so I though that python is also that powerful.

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• Is Using Tuples in my .NET 4.0 Code a Poor Design Decision?

  - by Jason Webb

  With the addition of the Tuple class in .net 4, I have been trying to decide if using them in my design is a bad choice or not. The way I see it, a Tuple can be a shortcut to writing a result class (I am sure there are other uses too). So this: public class ResultType { public string StringValue { get; set; } public int IntValue { get; set; } } public ResultType GetAClassedValue() { //..Do Some Stuff ResultType result = new ResultType { StringValue = "A String", IntValue = 2 }; return result; } Is equivalent to this: public Tuple<string, int> GetATupledValue() { //...Do Some stuff Tuple<string, int> result = new Tuple<string, int>("A String", 2); return result; } So setting aside the possibility that I am missing the point of Tuples, is the example with a Tuple a bad design choice? To me it seems like less clutter, but not as self documenting and clean. Meaning that with the type ResultType, it is very clear later on what each part of the class means but you have extra code to maintain. With the Tuple<string, int> you will need to look up and figure out what each Item represents, but you write and maintain less code. Any experience you have had with this choice would be greatly appreciated.

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• NSInvocation making app crash

  - by neha

  Hi all, I'm using NSInvocation as follows: In my init, I'm writing this in my viewDidLoad: SEL mySelector; mySelector = @selector(initParsersetId:type:); NSMethodSignature * sig = nil; sig = [[self class] instanceMethodSignatureForSelector:mySelector]; myInvocation = nil; myInvocation = [NSInvocation invocationWithMethodSignature:sig]; [myInvocation setTarget:self]; [myInvocation setSelector:mySelector]; SEL mySelector; mySelector = @selector(initParsersetId:type:); NSMethodSignature * sig = nil; sig = [[self class] instanceMethodSignatureForSelector:mySelector]; myInvocation = nil; myInvocation = [NSInvocation invocationWithMethodSignature:sig]; [myInvocation setTarget:self]; [myInvocation setSelector:mySelector]; And I'm calling it like this: Idea *tempIdea = [[Idea alloc]init]; tempIdea = [genericArray objectAtIndex:indexPath.row]; idea.ideaId = tempIdea.ideaId; [tempIdea release]; NSNumber *_id_ = [NSNumber numberWithInt:idea.ideaId]; [myInvocation setArgument:_id_ atIndex:2]; //CRASHING AT THIS LINE My application is crashing at the indicated line. Can anybody please help me?

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• Bind two images together to be dragged

  - by Ryan Beaulieu

  I'm looking for some help with a script to drag two images together at once. I currently have a script that allows me to drag thumbnail images into a collection bin to be saved later. However, some of my thumbnails have an image positioned over the top of them to represent these thumbnail images as "unknown" plants. I was wondering if someone could point me in the right direction as to how I would go about binding these two images together to be dragged. Here is my code: $(document).ready(function() { var limit = 16; var counter = 0; $("#mainBin1, #mainBin2, #mainBin3, #mainBin4, #mainBin5, #bin_One_Hd, #bin_Two_Hd, #bin_Three_Hd, #bin_Four_Hd, #bin_Five_Hd").droppable({ accept: ".selector, .plant_Unknown", drop: function(event, ui) { counter++; if (counter == limit) { $(this).droppable("disable"); } $(this).append($(ui.draggable).clone()); $("#cbOptions").show(); $(".item").draggable({ containment: "parent", grid: [72,72], }); } }); $(".selector").draggable({ helper: "clone", revert: "invalid", revertDuration: 700, opacity: 0.75, }); $(".plant_Unknown").draggable({ helper: "clone", revert: "invalid", revertDuration: 700, opacity: 0.75, }); }); Any help would be greatly appreciated. Thanks. EDIT: Website

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• Unexpected crash while using looking phone numbers in iPhone address book

  - by FX

  I have a rather unexpected result with the following code: ABAddressBookRef addressBook = ABAddressBookCreate(); CFArrayRef people = ABAddressBookCopyArrayOfAllPeople(addressBook); CFIndex nPeople = ABAddressBookGetPersonCount(addressBook); NSLog (@"npeople = %d = %d", nPeople, CFArrayGetCount(people)); for (CFIndex i = 0; i < nPeople; i++) { ABRecordRef record = CFArrayGetValueAtIndex(people,i); ABMultiValueRef numbers = ABRecordCopyValue(record, kABPersonPhoneProperty); CFIndex count = ABMultiValueGetCount(numbers); NSLog (@"%d %d", i, count); } I never reach the second NSLog, it crashes on the call to ABMultiValueGetCount with: : * -[NSCFString count]: unrecognized selector sent to instance 0x383e72f4 : Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '** -[NSCFString count]: unrecognized selector sent to instance 0x383e72f4' In short, it's behaving as if my "numbers" variable was an NSString. While I wrote the code above myself, the same can be found in many examples on the web. Does someone here spot anything wrong with it? Oh, and also: it only crashes in Release mode (in debug mode, all is fine).

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• Floats not clearing properly in IE - how to fix?

  - by Stomped

  I've been banging my head for about an hour now, and I've distilled the problem down to the simplest example I can think of that shows the problem. The CSS/HTML <style> #T div { float: left; } ._b { clear: left; } </style> <div id='T'> <div class='_a'>*</div> <div class='_b'>*</div> <div class='_c'>*</div> <div class='_d'>*</div> </div> IE7 *** * FF, Chrome, Opera * *** The result in FF/Chrome/Opera is what I'd expect. There's no adding more mark-up to fix this and I'm absolutely befuddled on to how to make it work properly in IE. It gets really ugly when you have say, 3 all on a row to themselves and then 3 meant to be on the same line -- the extra 2 end up on the first row. I really hope someone knows the work-around for this.

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• Dispose, when is it called?

  - by Snake

  Consider the following code: namespace DisposeTest { using System; class Program { static void Main(string[] args) { Console.WriteLine("Calling Test"); Test(); Console.WriteLine("Call to Test done"); } static void Test() { DisposeImplementation di = new DisposeImplementation(); } } internal class DisposeImplementation : IDisposable { ~DisposeImplementation() { Console.WriteLine("~ in DisposeImplementation instance called"); } public void Dispose() { Console.WriteLine("Dispose in DisposeImplementation instance called"); } } } The Dispose just never get's called, even if I put a wait loop after the Test(); invocation. So that quite sucks. I want to write a class that is straightforward and very easy to use, to make sure that every possible resource is cleaned up. I don't want to put that responsibilty to the user of my class. Possible solution: use using, or call Dispose myself(basicly the same). Can I force the user to use a using? Or can I force the dispose to be called? Calling GC.Collect(); after Test(); doesn't work either. Putting di to null doesn't invoke Dispose either. The Deconstructor DOES work, so the object get's deconstructed when it exits Test()

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• JQuery event that triggers after CSS is loaded?

  - by Dave

  (I posted this on the jquery forums but it's still awaiting moderation, so I thought I'd try my luck here since stackoverflow is so awesome. If I get an answer I'll post it here.) Maybe someone can help me with this, I have a couple of links on my page (inside a <div id="theme-selector">) which allow you to change the CSS stylesheets: $('#theme-selector a').click(function(){ var path = $(this).attr('href'); $('head link').remove(); $('head').append('<link type="text/css" href="'+path+'" rel="stylesheet" />'); return false; }); Now, after I've changed the style on the page, I want to get the new background color, using the following code (which I put after the $('head').append call): var bgcolor = $('body').css('background-color'); alert(bgcolor); The problem is, I think, that it takes some time for the browser to download the new stylesheet and I sometimes get the old background color in my alert message. Is there some event I can bind that will only alert me after all the stylesheets are loaded on the page? At the moment, all I can think of is using a setTimeout(function(){}, 5000); which isn't great, because what if it takes longer/shorter to load all the CSS on the page. Let me know if I need to clarify anything and I can provide more code. Thanks in advance.

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• Aggregation, Association and Composition (examples of code given)

  - by Bukocen

  I have such a simple example: public class Order { private ArrayList<Product> orders = new ArrayList<Product>(); public void add(Product p) { orders.add(p); } } Is it aggregation or composition? I guess it's composition, because orders will be delated after delete of Order, right? Unfortunately it was a task and answer was different;/ Do you know why? second problem: public class Client extends Person { String adress = ""; Orders orders = new Orders(); public Client(String n, String sn) { name = n; surName = sn; } public String getAddress() { return adress; } public Orders getOrders() { return this.orders; } } Is it Association between Client and Orders? My teacher told me that this is association, but I was wondering why it's not a aggregation/composition - he told me that aggregation or composition occur only when one class contains few instances of different class - is that right? I guess not, because e.g. car contains ONE wheel and it's aggregation I guess? What type of relation is that and why? Greetings

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• Global State and Singletons Dependency injection

  - by Manu

  this is a problem i face lot of times when i am designing a new app i'll use a sample problem to explain this think i am writing simple game.so i want to hold a list of players. i have few options.. 1.use a static field in some class private static ArrayList<Player> players = new ArrayList<Integer>(); public Player getPlayer(int i){ return players.get(i); } but this a global state 2.or i can use a singleton class PlayerList{ private PlayerList instance; private PlayerList(){...} public PlayerList getInstance() { if(instance==null){ ... } return instance; } } but this is bad because it's a singleton 3.Dependency injection class Game { private PlayerList playerList; public Game(PlayerList list) { this.list = list; } public PlayerList getPlayerList() { return playerList; } } this seems good but it's not, if any object outside Game need to look at PlayerList (which is the usual case) i have to use one of the above methods to make the Game class available globally. so I just add another layer to the problem. didn't actually solve anything. what is the optimum solution ? (currently i use Singleton approach)

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• Please help! Delegate returns null via Dipendency Injection.

  - by Raj Aththanayake

  Can someone please help? I use Google code’s Moq framework for mocking within my Unit Tests and Unity for Dependency Injection. In my Test class private Mock<ICustomerSearchService> CustomerSearchServiceMock = null; private CustomerService customerService = null; private void SetupMainData() { CustomerSearchServiceMock = new Mock<ICustomerSearchService>(); customerService = new CustomerService (); // CustomerSearchService is a property in CustomerService and dependency is configuered via Unity customerService.CustomerSearchService = CustomerSearchServiceMock.Object; Customer c = new Customer () { ID = "AT" }; CustomerSearchServiceMock.Setup(s => s.GetCustomer(EqualsCondition)).Returns(c); } [TestMethod] public void GetCustomerData_Test_Method() { SetupMainData() var customer = customerService.GetCustomerData("AT"); } public static bool EqualsCondition(Customer customer) { return customer.ID.Equals("AT"); } In my Test class CustomerService class public class CustomerService : ICustomerService { [Dependency] public ICustomerSearchService CustomerSearchService { get; set; } public IEnumerable<SomeObject> GetCustomerData(string custID) { I GET Null for customer ?????} var customer = CustomerSearchService.GetCustomer (c => c.ID.Equals(custID)); //Do more things } } When I debug the code I can see CustomerSearchService has a proxy object, but the customer returns as null. Any ideas? Or is there something missing here? Note: ICustomerSearchService I have implemented below method. Customer GetCustomer(Func<Customer, bool> predicate);

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• Using CSS to create three boxes with dividers and text centered within each box

  - by linnse

  I'm trying to figure out the best way to create a row of three boxes (columns), with dividers between boxes 1 and 2, and boxes 2 and 3. The text would need to be centered within each box. h2 { color: #00ADEF; margin-top:0; margin-bottom:0; font-family:Arial, Helvetica, sans-serif; font-size:20px; font-weight:bold; line-height:23px; } p { margin-top:0; } .3colwrapper { width: 930px; margin: 0 auto; } .colbox { float:left; margin: 10px; width: 210px; background:#DDD; padding:10px 40px; } <div class="3colwrapper"> <div class="colbox"><h2>Step One</h2> <p>Sign up</p> </div> <div class="colbox"><h2>Step Two</h2> <p>Verify</p> </div> <div class="colbox"><h2>Step Three</h2> <p>Participate</p> </div> </div> Here's what I've worked up so far: http://cssdesk.com/YyjAr

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• Hide table row onclick using jquery

  - by John

  I have a bunch of table rows such as: <tr> <td>cell1</td> <td>cell2</td> <td><a href="action.php">cell3</a></td> </tr> <tr class="notes_row"> <td colspan="6"> <ul class="message warning no-margin" id="notes_box"> <li>Notes here</li> </ul> </td> </tr> <tr> <td>cell1</td> <td>cell2</td> <td><a href="action.php">cell3</a></td> </tr> The class="notes_row" is only there if notes are present for the row above it. How can I hide the tr and if its there the tr with the notes_row class below it without affecting the other rows using jquery? So if someone clicked cell3 the tr that link is in is hidden then if there is a notes table row below it, it hides that as well.

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