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• Site Review: Facebook.com and Blockbuster.com - Navigation Schemes

  After cycling through a list of my favorite sites I decided to select Facebook.com and Blockbuster.com for this  post because I found their navigation schemes very intuitive. Facebook in my opinion took a very simplistic and minimalistic approach when they designed their site and its navigation. For example, when you login to your account you will find on the upper left hand side a generic section of the site common areas to all users like news, messages, events, photos and friends. Below this in a separate navigation menu is a list of applications that a user has elected to access through bookmarks. Finally in the upper right hand corner of the site contains links to administer the user’s account like account settings, public profile, and a link back to the users’ home page. Blockbuster on the other had tried to make site navigation a little more slick by using a menu-submenu approach to navigation where user can click on things like Rent, Buy, On Demand, Games, Stores, and Gifts and a submenu of corresponding items appears below the original menu item. In addition they also took this approach and added categorized lists of movies that they offer on the homepage so that users can click on an item like “DVD Spotlight” and a list of movies represented as actual DVD box cases appear on the user’s screen so they can scroll through the list by using left and right arrows on either side of the images displayed. Both Facebook and Blockbuster have more than one navigation groupings because their respected sites are so large and offer an absorbent amount of features. Because of this reason they have to group the main functionality of information in to logical groups based on their actions they perform and the access to specific information. For example it would not make sense for Facebook to include a particular game you like to play within your account with a section pertaining to account administration. The game link would be completely out of place and really confuse the users experience because the groupings where not logically grouped. In addition I think that Facebook users would benefit if Facebook allowed its users to specify what they want on the general navigation from within their site or at least create a section to show frequently accessed pages or favorite sections. Finally regarding additional navigation, I think blockbuster users really benefit from the submenu system of categorizing data, and if fact Blockbuster even allows them to refine the information they are looking for through the use of secondary submenu systems allowing users to really drill down in to what they are looking for to learn more on. I do not think that having more than one navigation bar on a web page is not confusing for the user. For example if you have a navigation bar at the top of your page and at the bottom will allow users to move around the website easier because they can utilize the navigation closest to where their cursor is on the page. In regards to designers forcing all the navigation in to one navigation bar, I think it would be hard for the user to fully understand what is going on based on the size and complexity of the site they are dealing with. For example Blockbuster has a ton of content that could not easily be put in to one navigation bar. From my experience with both Facebook and Blockbuster, they both do a good job with cross browser compatibility. I have had no issues with either site in IE, Firefox, Chrome, and Safari over the years. In addition, I do not believe that either Facebook or Blockbuster require any additional plug-in to utilize their navigation bars.

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• Silverlight ProgressBar issues with Binding

  - by Chris Skardon

  The ProgressBar pretty much does what it says on the tin, displays progress, in a bar form (well, by default anyhow). It’s pretty simple to use: <ProgressBar Minimum="0" Maximum="100" Value="50"/> Gives you a progress bar with 50% of it filled: Easy! But of course, we’re wanting to use binding to change the value, again, pretty easy, have a ViewModel with a ‘Value’ in it, and bind: <ProgressBar Minimum="0" Maximum="100" Value="{Binding Value}"/> Spiffy, and whilst we’re at it, why not bind the Maximum value as well – after all, we can’t be sure of the size of the progress, and it’s a pain to have to work out the percentage (when the progress bar can do it for us): <ProgressBar Minimum="0" Maximum="MaximumValue" Value="{Binding Value}"/> Right, this will work absolutely fine. Or will it??? On the face of it, it looks good, and testing it shows no issues, until at one point we go from: Maximum = 100; Value = 90; to Maximum=60; Value=50; On the face of it not unreasonable. The problem is more obvious if we look at the states of the properties after each set (initially Maximum is set at 1, Value = 0): Code Maximum Value Value < Maximum Maximum = 100; 100 0 True Value = 90; 100 90 True Maximum = 60; 60 90 False Value = 50; 60 50 True Everything is good until the Value is less than the Maximum, at this point the Progress Bar breaks. That’s right, it no longer updates itself, it will always look 100% full. The simple solution – always ensuring you set Value before Maximum is fine unless you’re using a ProgressBar in a less controlled environment – where for example you’re setting a ‘container’ with both values at the same time. The example I have is in a DataTemplate, I have a DataTemplate for a BusyIndicator, (specifically the BusyContentTemplate). The binding works this way: <BusyIndicator BusyContent="{Binding BusyContent}" BusyContentTemplate="{Binding ProgressTemplate}"/> With the template as the ProgressBar defined above… I was setting my BusyContent like this: BusyContent = content; aaaaaand finally, ‘content’ is a class: public class ContentClass : INotifyPropertyChanged { //Obviously this is properly implemented… public double Maximum { get;set;} public double Value { get;set;} } Soooo… As I was replacing the BusyContent wholesale, the order of the binding being set was outside of my control, so – how to go about it? Basically? Fudge it. Modify the ContentClass to include a method: public void Update(double value, double max) { Value = value; Maximum = max; } and change where the setting is to be: BusyContent.Update(content.Value, content.Maximum); Thereby getting the order correct.. Obvious really. Meh :|

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• RewriteRule not working for certain URLs

  - by keiki

  There are a few domains pointing towards the same server, and of course I need them all redirect to only one of them. Redirects work, but only for certain URLs. What works: http://www.domain.com, http://domain.com, domain.com/index.html, domain.com/index.php, , domain.com/nonExistentDirectory, and if I click in the menu the following URLs are also redirected correctly: domain.com/foo/bar, domain.com/foo/bar.html or .php or other extension. What doesn't work: domain.com/existentDirectory, domain.com/foo/bar (if I type the URL in the address bar). If anyone will have the time and skill and will to tell me where's the mistake, I'll be deeply grateful. Here's my .htaccess file: AddHandler x-httpd-php .html .htm <ifModule mod_gzip.c> mod_gzip_on Yes mod_gzip_dechunk Yes mod_gzip_item_include file \.(html?|txt|css|js|php|pl)$ mod_gzip_item_include handler ^cgi-script$ mod_gzip_item_include mime ^text/.* mod_gzip_item_include mime ^application/x-javascript.* mod_gzip_item_exclude mime ^image/.* mod_gzip_item_exclude rspheader ^Content-Encoding:.*gzip.* </ifModule> <ifModule mod_expires.c> ExpiresActive On ExpiresDefault "access plus 1 seconds" ExpiresByType text/html "access plus 1 seconds" ExpiresByType image/gif "access plus 2592000 seconds" ExpiresByType image/jpeg "access plus 2592000 seconds" ExpiresByType image/png "access plus 2592000 seconds" ExpiresByType text/css "access plus 2592000 seconds" ExpiresByType text/javascript "access plus 216000 seconds" ExpiresByType application/x-javascript "access plus 216000 seconds" </ifModule> <ifModule mod_headers.c> <filesMatch "\\.(ico|pdf|flv|jpg|jpeg|png|gif|swf)$"> Header set Cache-Control "max-age=2592000, public" </filesMatch> <filesMatch "\\.(css)$"> Header set Cache-Control "max-age=2592000, public" </filesMatch> <filesMatch "\\.(js)$"> Header set Cache-Control "max-age=216000, private" </filesMatch> <filesMatch "\\.(xml|txt)$"> Header set Cache-Control "max-age=216000, public, must-revalidate" </filesMatch> <filesMatch "\\.(html|htm|php)$"> Header set Cache-Control "max-age=1, private, must-revalidate" </filesMatch> </ifModule> <ifModule mod_headers.c> Header unset ETag </ifModule> FileETag None <ifModule mod_headers.c> Header unset Last-Modified </ifModule> # BEGIN WordPress <IfModule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] </IfModule> # END WordPress RewriteCond %{HTTP_HOST} ^foo\.com$ [OR] RewriteCond %{HTTP_HOST} ^www\.foo\.com$ RewriteRule (.*) http://domain.com/$1 [R=301,L,QSA] RewriteCond %{HTTP_HOST} ^foo1\.com$ [OR] RewriteCond %{HTTP_HOST} ^www\.foo1\.com$ RewriteRule (.*) http://domain.com/$1 [R=301,L,QSA] RewriteCond %{HTTP_HOST} ^foo2\.com$ [OR] RewriteCond %{HTTP_HOST} ^www\.foo2\.com$ RewriteRule (.*) http://domain.com/$1 [R=301,L,QSA] RewriteCond %{HTTP_HOST} ^foo3\.com$ [OR] RewriteCond %{HTTP_HOST} ^www\.foo3\.com$ RewriteRule (.*) http://domain.com/$1 [R=301,L,QSA] RewriteCond %{HTTP_HOST} ^foo8\.com$ [OR] RewriteCond %{HTTP_HOST} ^www\.foo8\.com$ RewriteRule (.*) http://domain.com/$1 [R=301,L,QSA] Thinking that the above version was overkill, I've also tried to redirect all the requests for domains different than the main on to be redirected to it like this: RewriteCond %{HTTP_HOST} !^domain\.com$ [NC] RewriteRule ^(.*)$ http://domain.com [L,R=301] Is it also wrong? Because it doesn't work either! P.S. @Sodved I've tried that and it doesn't help (I comment here because I can't seem to be able to comment your answer.) Removing the following piece of code didn't solve the issue either, so the problem must be somewhere else: # BEGIN WordPress <IfModule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] </IfModule> # END WordPress New details: using this tool for checking the redirects I got the following results for the URLs that are not redirected: Checked link: http://domain.com/aDirectory/ Type of link: direct link (note the trailing slash above) and: Checked link: http://domain.com/aDirectory Type of redirect: 301 Moved Permanently Redirected to: http://domain.com/aDirectory/ (no trailing slash here) I hope/suspect I'm getting closer to the cause of this behavior.

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• Update iPhone UIProgressView during NSURLConnection download.

  - by Scott Pendleton

  I am using this code: NSURLConnection *oConnection=[[NSURLConnection alloc] initWithRequest:oRequest delegate:self]; to download a file, and I want to update a progress bar on a subview that I load. For that, I use this code: - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { [oReceivedData appendData:data]; float n = oReceivedData.length; float d = self.iTotalSize; NSNumber *oNum = [NSNumber numberWithFloat:n/d]; self.oDPVC.oProgress.progress = [oNum floatValue]; } The subview is oDPVC, and the progress bar on it is oProgress. Setting the progress property does not update the control. From what I have read on the Web, lots of people want to do this and yet there is not a complete, reliable sample. Also, there is much contradictory advice. Some people think that you don't need a separate thread. Some say you need a background thread for the progress update. Some say no, do other things in the background and update the progress on the main thread. I've tried all the advice, and none of it works for me. One more thing, maybe this is a clue. I use this code to load the subview during applicationDidFinishLaunching: self.oDPVC = [[DownloadProgressViewController alloc] initWithNibName:@"DownloadProgressViewController" bundle:nil]; [window addSubview:self.oDPVC.view]; In the XIB file (which I have examined in both Interface Builder and in a text editor) the progress bar is 280 pixels wide. But when the view opens, it has somehow been adjusted to maybe half that width. Also, the background image of the view is default.png. Instead of appearing right on top of the default image, it is shoved up about 10 pixels, leaving a white bar across the bottom of the screen. Maybe that's a separate issue, maybe not.

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• Add a sub-view to a DetailView UIView in iPad

  - by Elisabeth

  I'm creating a split view controller app, the detail view has a segmented control in a navigation bar at the top. Clicking on a segment will add a new view to the detail view with the appropriate information on it (covering up the DetailViewController's default UIView). I've created two new UIViews, corresponding to each segment, and I'm trying to add them to the view like this (in DetailViewController.m): if (exerciseSegmentControl.selectedSegmentIndex == UISegmentedControlNoSegment) { NSLog(@"No segment selected"); } UIView *viewToShow; if (selectedView == 0 && exerciseSegmentControl.selectedSegmentIndex == 1) { viewToShow = exerciseSolutionView; } else { viewToShow = exerciseView; } [self.view addSubview:viewToShow]; I see the view appear, but it's in the wrong place, it is placed at the very top of the window, instead of below the navigation bar. In IB, I've created instances of the views, and I've used the Attributes inspector to specify "Navigation Bar" for top bar, which sets the height of the view correctly. But the view is clearly being added too far up in the window - I see the view below it (the DetailViewController's UIView) peaking out at the bottom (I changed the background color so I know which view I'm seeing). Any tips on how to get the subview I'm adding to get placed correctly in the window? Thanks!

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• Any Other Ideas for prototyping..

  - by davehamptonusa

  I've used Douglass Crockford's Object.beget, but augmented it slightly to: Object.spawn = function (o, spec) { var F = function () {}, that = {}, node = {}; F.prototype = o; that = new F(); for (node in spec) { if (spec.hasOwnProperty(node)) { that[node] = spec[node]; } } return that; }; This way you can "beget" and augment in one fell swoop. var fop = Object.spawn(bar, { a: 'fast', b: 'prototyping' }); In English that means, "Make me a new object called 'fop' with 'bar' as its prototype, but change or add the members 'a' and 'b'. You can even nest it the spec to prototype deeper elements, should you choose. var fop = Object.spawn(bar, { a: 'fast', b: Object.spawn(quux,{ farple: 'deep' }), c: 'prototyping' }); This can help avoid hopping into an object's prototype unintentionally in a long object name like: foo.bar.quux.peanut = 'farple'; If quux is part of the prototype and not foo's own object, your change to 'peanut' will actually change the protoype, affecting all objects prototyped by foo's prototype object. But I digress... My question is this. Because your spec can itself be another object and that object could itself have properties from it's prototype in your new object - and you may want those properties...(at least you should be aware of them before you decided to use it as a spec)... I want to be able to grab all of the elements from all of the spec's prototype chain, except for the prototype object itself... This would flatten them into the new object. Should I use: Object.spawn = function (o, spec) { var F = function () {}, that = {}, node = {}; F.prototype = o; that = new F(); for (node in spec) { that[node] = spec[node]; } that.prototype = o; return that; }; I would love thoughts and suggestions...

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• Mvc2 validation summary and required metadata

  - by Arnis L.

  source code... Thing is, if i specify required metadata using fluent modelmetadata provider like this= public class Foo { public string Bar { get; set; } } public class FooModelMetadataConfiguration : ModelMetadataConfiguration<Foo> { public FooModelMetadataConfiguration() { Configure(x => x.Bar) .Required("lapsa") ; } } And write this into my view = <% Html.BeginForm(); %> <%= Html.ValidationSummary() %> <%= Html.TextBoxFor(x=>x.Bar) %> <% Html.EndForm(); %> And add this to home controller = [HttpPost] public ActionResult Index(Foo foo) { ViewData["Message"] = "Welcome to ASP.NET MVC!"; return View(foo); } It will output this html = <div class="validation-summary-errors"> <ul> <li>lapsa</li> <li>The Bar field is required.</li> </ul> </div> I can't understand why 2nd error is rendered and how to omit it. Author of System.Web.Mvc.Extensibility framework replied with = I think this is a known issue of asp.net mvc, i could not remember the exact location where I have read it, I suggest you post the issue in asp.net mvc issue tracker over codeplex. But before i post anything on issue tracker - i would like to understand first what exactly is wrong. Any help with that?

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• ASP.Net RadioButton loses ViewState

  - by Carl

  I'm having trouble with a simple radio set of two radio buttons (I don't want to use a RadioButtonList [RBL] because RBL doesn't allow child controls, and in my case, if you select one option, I want to enable a textbox next to the button; yes you could hack this with jQuery to move the textbox, but that's dirty!). I would check one, submit the form (either explicitly or through AutoPostBack), and the CheckedChanged event would never fire. When the page was reloaded, both buttons would be unchecked, regardless of their initial state on non-postback load or the state before form submission. I took out the checkbox and stripped this down to the simplest example I could come up with. I tossed EnableViewState=true all over the place just in case it was being disabled somewhere I couldn't find. <form id="form1" runat="server" enableviewstate="true"> <div> <asp:RadioButton ID="foo" Text="foo" runat="server" AutoPostBack="true" OnCheckedChanged="rbChanged" Checked="true" GroupName="foobar" EnableViewState="true" /> <asp:RadioButton ID="bar" Text="bar" runat="server" AutoPostBack="true" GroupName="foobar" OnCheckedChanged="rbChanged" Checked="false" EnableViewState="true" /> <asp:Label runat="server" ID="resultLbl" /> </div> </form> protected void rbChanged(object sender, EventArgs e) { if (foo.Checked) resultLbl.Text = "foo is checked"; else if (bar.Checked) resultLbl.Text = "bar is checked"; else resultLbl.Text = "neither is checked"; }

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• Enum "does not have a no-arg default constructor" with Jaxb and cxf

  - by Dave

  A client is having an issue running java2ws on some of their code, which uses & extends classes that are consumed from my SOAP web services. Confused yet? :) I'm exposing a SOAP web service (JBoss5, Java 6). Someone is consuming that web service with Axis1 and creating a jar out of it with the data types and client stubs. They are then defining their own type, which extends one of my types. My type contains an enumeration. class MyParent { private MyEnumType myEnum; // getters, settters for myEnum; } class TheirChild extends MyParent { ... } When they are running java2ws on their code (which extends my class), they get Caused by: com.sun.xml.bind.v2.runtime.IllegalAnnotationsException: 2 counts of IllegalAnnotationExceptions net.foo.bar.MyEnuMType does not have a no-arg default constructor. this problem is related to the following location: at net.foo.bar.MyEnumType at public net.foo.bar.MyEnumType net.foo.bar.MyParent.getMyEnum() The enum I've defined is below. This is now how it comes out after being consumed, but it's how I have it defined on the app server: @XmlType(name = "MyEnumType") @XmlEnum public enum MyEnumType { Val1("Val1"), Val2("Val2") private final String value; MyEnumType(String v) { value = v; } public String value() { return value; } public static MyEnumType fromValue(String v) { if (v == null || v.length() == 0) { return null; } if (v.equals("Val1")) { return MyEnumType.Val1; } if (v.equals("Val2")) { return MyEnumType.Val2; } return null; } } I've seen things online and other posts, like (this one) regarding Jaxb's inability to handle Lists or things like that, but I'm baffled about my enum. I'm pretty sure you can't have a default constructor for an enum (well, at least a public no-arg constructor, Java yells at me when I try), so I'm not sure what makes this error possible. Any ideas? Also, the "2 counts of IllegalAnnotationsExceptions" may be because my code actually has two enums that are written similarly, but I left them out of this example for brevity.

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• adding tabbar to uiview (not tabbarcontroller) to switch views

  - by Pavan

  Hi, i added a Tab bar to my existing view called secondViewController where there are now 4 tab bar items using interface builder. This tab bar will allow the users to switch between views. This is what ive tried to do: If i use a tabbar controller, then a new view pops up and i dont want that. i simply want to be able to add a tab bar as ive done and carry on from there. i dont know how to actually connect it all up and make everything work together. This is what i understand: i have to make my current - secondViewController an tabbardelegate which is what ive done as shown @interface paddedDholViewController : UIViewController <AVAudioPlayerDelegate, UITabBarDelegate> { } then i understand that i have to add tabBar.delegate = self; for me to be able to detect the tabBar:didSelectItem: so i can then implement something like this - (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController { if ([viewController.tabBarItem.title isEqualToString:@"FIRST"]) { NSLog(@"FIRST"); } else if ([viewController.tabBarItem.title isEqualToString:@"SECOND"]) { NSLog(@"SECOND"); } } to be able to switch between the views The thing is as ive said before i dont know how to implement all of this and how to connect everything up. can someone help me please. Thank you in advance

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• How to implement iPhone TitleBar in Android

  - by edwar12345

  You know in iPhone, The four components of a typical iPhone application are a title bar, a navigation list, a destination page, and a button bar. for The Title Bar The title bar includes the following elements: Back button: Screen title: Command button: My question comes, although i can use UI framework tool, such as: Phonegap, iui, jtquery to develop web app, but i can't display the TitleBar effect in Android, i can't use below code in Android: meta content="yes" name="apple-mobile-web-app-capable" Actually, the above can work in Apple Safari Browser, but I can't use Safari to display our Android Project, which is i don't want to see. Does anyone know how to fulfill this effect in Android, please help me, your help will be great appreciated. to "It's unclear if you developing a native android application or a webapp. – alexanderblom yesterday" sorry that i forget to mention, i want to develop a iphone-webapp-style application in Android. Since it's too difficult, i want to use iWebkit, but it seems only work in apple iPhone OS or Safari which contain the specific engine to display the beautiful layout, like below:( -_-! i am new so i can't post images here) http://images.appshopper.com/screenshots/305/690205_2.jpg

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• popViewController does not autorotate back to allowed orientation

  - by JoeGaggler

  I have two UIViewControllers, "A" and "B", where "A" overrides the shouldAutorotateToInterfaceOrientation to return YES for UIInterfaceOrientationPortrait, and "B" returns YES for all orientations. In my example "A" is the root navigation view controller, and I then use pushViewController for "B". After that I rotate the device into landscape, which successfully autorotates "B", then I pop "B" (back button or via popViewController) to return to "A". When targetting iPhone OS 3.1.3, "A" returns to the portrait orientation as expected. When targetting iPhone OS 3.2, I have two side-effects: "A" is displayed in landscape. The navigation bar does not update even though "A" is now displayed. The navigation bar still shows the items for "B". Only after trying to go back/pop one more time will the navigation bar animate to show the items for "A". If I instead attempt to push "B" again and go back, I have to pop twice before the navigation bar animates to show the items for "A". During these "intermediate pops" the view for "A" remains displayed. While researching this issue, I have seen other answers suggesting performing the rotation manually ([UIDevice setOrientation] or via a tranformation), however this does not help understand what the problem is, especially why it behaves differently between the two OS's. So my question is: must all of my UIViewControllers on the UINavigationController stack support exactly the same orientations going forward? And if not, then is there something that I need to do to make it behave as it did for OS 3.1.3?

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• Git-svn refuses to create branch on svn repository error: "not in the same repository"

  - by Danny

  I am attempting to create a svn branch using git-svn. The repository was created with --stdlayout. Unfortunately it generates an error stating the "Source and dest appear not to be in the same repository". The error appears to be the result of it not including the username in the source url. $ git svn branch foo-as-bar -m "Attempt to make Foo into Bar." Copying svn+ssh://my.foo.company/r/sandbox/foo/trunk at r1173 to svn+ssh://[email protected]/r/sandbox/foo/branches/foo-as-bar... Trying to use an unsupported feature: Source and dest appear not to be in the same repository (src: 'svn+ssh://my.foo.company/r/sandbox/foo/trunk'; dst: 'svn+ssh://[email protected]/r/sandbox/foo/branches/foo-as-bar') at /home/me/.install/git/libexec/git-core/git-svn line 610 I intially thought this was simply a configuration issue, examination of .git/config doesn't suggest anything incorrect. [svn-remote "svn"] url = svn+ssh://[email protected]/r fetch = sandbox/foo/trunk:refs/remotes/trunk branches = sandbox/foo/branches/*:refs/remotes/* tags = sandbox/foo/tags/*:refs/remotes/tags/* I am using git version 1.6.3.3. Can anyone shed any light on why this might be occuring, and how best to address it?

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• Pagination in Joomla!

  Hi every one. I'm a bit new to Joomla! and I'm building my new web site using Joomla! 1.5.8 with a template bought from RocketTheme. The long article in question is a gallery of photos, and I wanted to create a horizontal pagination nav-bar in the footer of the gallery, I just clicked pagebreak where I wanted to paginate in my article in the WYSIWYG editor and thought that it's actually all I have to do. What I got was ugly; a vertically directed navigation bar placed in the top right side of my gallery with the links to each part of the article, the all without the minimum styling. And as I see it's a table! Why not outputting a list instead of a table! (Well this is not actually my concern right now). I can understand CSS and html, but I'm not really a PHP guy, so I don't understand how to use pagination.php or pagenavigation.php! Do I have to customize one of them to have my nav-bar? What I have to do to get that horizontal nav-bar? Really thanks in advance. Wassim

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• Why can't the compiler/JVM just make autoboxing "just work"?

  - by Pyrolistical

  Autoboxing is rather scary. While I fully understand the difference between == and .equals I can't but help have the follow bug the hell out of me: final List<Integer> foo = Arrays.asList(1, 1000); final List<Integer> bar = Arrays.asList(1, 1000); System.out.println(foo.get(0) == bar.get(0)); System.out.println(foo.get(1) == bar.get(1)); That prints true false Why did they do it this way? It something to do with cached Integers, but if that is the case why don't they just cache all Integers used by the program? Or why doesn't the JVM always auto unbox to primitive? Printing false false or true true would have been way better. EDIT I disagree about breakage of old code. By having foo.get(0) == bar.get(0) return true you already broke the code. Can't this be solved at the compiler level by replacing Integer with int in byte code (as long as it is never assigned null)

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• Snow Leopard & LSUIElement -> application not activating properly, window not "active" despite being

  - by Frank R.

  Hi, I'm running into a few problem with a background application that uses LSUIElement=1 to hide its dock item, menu bar and prevent it from appearing in the Command-Tab application switcher. It seems to be a Snow Leopard only problem. The application places an NSStatusItem in the menu bar and pops up a menu when clicked on. Selecting "Preferences..." should bring up an NSWindow with the preferences. The first thing that doesn't seem to work is that the Window does not get ordered in at the front, but appears behind all other application windows. I tried to fix this by calling [[NSApplication sharedApplication] activateIgnoringOtherApps: YES] but that didn't work. After a while I figured out that the menu is blocking the message to the run loop from being sent, so I wrote another method on the MainController and sent the message with a delay: [self performSelector:@selector(setFront:) withObject: [preferencesController window] afterDelay:1.0]; -(void)setFront: (id) theWindow { [[NSApplication sharedApplication]activateIgnoringOtherApps:YES]; [theWindow orderFrontRegardless]; [theWindow makeKeyWindow]; [[NSApplication sharedApplication] activateIgnoringOtherApps:YES]; } Note the send-every-possible-message-to-make-it-do-what-it-should-be-doing-approach. This works, kind-of, the window is brought to the front on top of all other windows from all apps, BUT most of the time it isn't active, meaning it's title bar is greyed out. Clicking on the title bar won't make the window active either. Clicking INSIDE of the window will make it active!? This all didn't seem to be a problem in Leopard; just calling activateIgnoringOtherApps and making the window key seemed to work just fine. In Snow Leopard there is a new API designed to replace LSUIElement that is supposed to emulate its behaviour: http://developer.apple.com/mac/library/releasenotes/cocoa/appkit.html I've played around with that, but it's SL-only and I haven't been able to get LSUIElement being set. Any help would be greatly appreciated!

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• Resize a UITableView to accomodate a translucent header before it becomes visible

  - by scotru

  I have a UITableView inside a UINavigationController. The navigation controller uses a translucent navigation bar--as a result, my table view is displayed behind the navigation bar and it's height includes the height of the navigation bar. However, I want the table view to appear below the navigation bar (as it would if it were not translucent). I'm working in MonoTouch, but I think the principles are language independent. Here's the code I'm using to resize the UITableView frame: RectangleF rect = tableView.Frame; tableView.Frame = new RectangleF (rect.Left, rect.Top + 44, rect.Width, rect.Height - 44); tableView.ContentInset = new UIEdgeInsets (0, 0, 0, 0); This works fine if I place it in the viewDidAppear method, but will not work in the viewWillAppear method. In the viewDidAppear method, however I can see the resize occurring briefly in the form of a flicker. I want to do the resize before the frame appears. But if I put this code in viewWillAppear or viewDidLoad, it has no effect. Thanks in advance for any help!

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• using sfDoctrineGuardPlugin for regular member login?

  - by fayer

  i want to create users for my webapplication. im using symfony. i wonder if i should do that with sfDoctrineGuardPlugin or symfony's provided methods for this? // Add one or more credentials $user->addCredential('foo'); $user->addCredentials('foo', 'bar'); // Check if the user has a credential echo $user->hasCredential('foo'); => true // Check if the user has both credentials echo $user->hasCredential(array('foo', 'bar')); => true // Check if the user has one of the credentials echo $user->hasCredential(array('foo', 'bar'), false); => true // Remove a credential $user->removeCredential('foo'); echo $user->hasCredential('foo'); => false // Remove all credentials (useful in the logout process) $user->clearCredentials(); echo $user->hasCredential('bar'); => false or is the purpose of sfDoctrineGuardPlugin just securing the admin page and not the frontend logging system? thanks.

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• Using boost::random as the RNG for std::random_shuffle

  - by Greg Rogers

  I have a program that uses the mt19937 random number generator from boost::random. I need to do a random_shuffle and want the random numbers generated for this to be from this shared state so that they can be deterministic with respect to the mersenne twister's previously generated numbers. I tried something like this: void foo(std::vector<unsigned> &vec, boost::mt19937 &state) { struct bar { boost::mt19937 &_state; unsigned operator()(unsigned i) { boost::uniform_int<> rng(0, i - 1); return rng(_state); } bar(boost::mt19937 &state) : _state(state) {} } rand(state); std::random_shuffle(vec.begin(), vec.end(), rand); } But i get a template error calling random_shuffle with rand. However this works: unsigned bar(unsigned i) { boost::mt19937 no_state; boost::uniform_int<> rng(0, i - 1); return rng(no_state); } void foo(std::vector<unsigned> &vec, boost::mt19937 &state) { std::random_shuffle(vec.begin(), vec.end(), bar); } Probably because it is an actual function call. But obviously this doesn't keep the state from the original mersenne twister. What gives? Is there any way to do what I'm trying to do without global variables?

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• Advantages/Disadvantages of different implementations for Comparing Objects using .NET

  - by Kevin Crowell

  This questions involves 2 different implementations of essentially the same code. First, using delegate to create a Comparison method that can be used as a parameter when sorting a collection of objects: class Foo { public static Comparison<Foo> BarComparison = delegate(Foo foo1, Foo foo2) { return foo1.Bar.CompareTo(foo2.Bar); }; } I use the above when I want to have a way of sorting a collection of Foo objects in a different way than my CompareTo function offers. For example: List<Foo> fooList = new List<Foo>(); fooList.Sort(BarComparison); Second, using IComparer: public class BarComparer : IComparer<Foo> { public int Compare(Foo foo1, Foo foo2) { return foo1.Bar.CompareTo(foo2.Bar); } } I use the above when I want to do a binary search for a Foo object in a collection of Foo objects. For example: BarComparer comparer = new BarComparer(); List<Foo> fooList = new List<Foo>(); Foo foo = new Foo(); int index = fooList.BinarySearch(foo, comparer); My questions are: What are the advantages and disadvantages of each of these implementations? What are some more ways to take advantage of each of these implementations? Is there a way to combine these implementations in such a way that I do not need to duplicate the code? Can I achieve both a binary search and an alternative collection sort using only 1 of these implementations?

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• Using map/reduce for mapping the properties in a collection

  - by And

  Update: follow-up to MongoDB Get names of all keys in collection. As pointed out by Kristina, one can use Mongodb 's map/reduce to list the keys in a collection: db.things.insert( { type : ['dog', 'cat'] } ); db.things.insert( { egg : ['cat'] } ); db.things.insert( { type : [] }); db.things.insert( { hello : [] } ); mr = db.runCommand({"mapreduce" : "things", "map" : function() { for (var key in this) { emit(key, null); } }, "reduce" : function(key, stuff) { return null; }}) db[mr.result].distinct("_id") //output: [ "_id", "egg", "hello", "type" ] As long as we want to get only the keys located at the first level of depth, this works fine. However, it will fail retrieving those keys that are located at deeper levels. If we add a new record: db.things.insert({foo: {bar: {baaar: true}}}) And we run again the map-reduce +distinct snippet above, we will get: [ "_id", "egg", "foo", "hello", "type" ] But we will not get the bar and the baaar keys, which are nested down in the data structure. The question is: how do I retrieve all keys, no matter their level of depth? Ideally, I would actually like the script to walk down to all level of depth, producing an output such as: ["_id","egg","foo","foo.bar","foo.bar.baaar","hello","type"] Thank you in advance!

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• qTip jQuery Plugin not always Firing

  - by tonsils

  Hi, I am using the qTip jquery plugin qTip plugin for a website I'm working on based on another thread I raised here: stack overflow thread My question is, I have a navigation bar running along the top of my screen which is basically sets the title attribute based on the tab menu you are in, these are all stored within a javascript array. For example, I have three menu options running along the top of the screen, say Menu A, Menu B and Menu C. I also have an information image positioned at the rightmost position of the nav bar, which I set the title attribute, based on the Menu option selected in the Nav Bar. For example: Menu A => myRole[0] = "Admin" Menu B => myRole[1] = "Manager" Menu C => myRole[2] = "Guest" So basically as the user clicks on each of the menus in the nav bar, I set the title attribute in the information image to either "Admin","Manager" or "Guest". At startup, the qTip plugin works and displays "Admin" when I hover over it but when I change the menu to Menu C, it still displays "Admin" instead of "Guest" From the looks of it, it doesn't seem to be calling the qTip plugin, which I have positioned at the footer of the screen (see actual code below). Any ideas how to ensure that the qTip fires every time I click/change menu options and pickups value within javascript array? <script type="text/javascript" src="jquery.qtip-1.0.0-rc3.min.js"></script> <script type="text/javascript"> $(document).ready(function() { $('div#infoi img[title]').qtip({ position: { adjust: { x:-110, y:0 }, corner: { target: 'bottomLeft', tooltip: 'topMiddle' } }, style: { width: 250, padding: 5, background: '#E7F1FA', color: 'black', textAlign: 'center', border: { width: 3, color: '#65a9d7' }, tip: 'topRight' } }); }); </script> Thanks.

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• seg fault at the end of program after executing everything?

  - by Fantastic Fourier

  Hello all, I wrote a quick program which executes every statement before giving a seg fault error. struct foo { int cat; int * dog; }; void bar (void * arg) { printf("o hello bar\n"); struct foo * food = (struct foo *) arg; printf("cat meows %i\n", food->cat); printf("dog barks %i\n", *(food->dog)); } void main() { int cat = 4; int * dog; dog = &cat; printf("cat meows %i\n", cat); printf("dog barks %i\n", *dog); struct foo * food; food->cat = cat; food->dog = dog; printf("cat meows %i\n", food->cat); printf("dog barks %i\n", *(food->dog)); printf("time for foo!\n"); bar(food); printf("begone!\n"); cat = 5; printf("cat meows %i\n", cat); printf("dog barks %i\n", *dog); // return 0; } which gives a result of cat meows 4 dog barks 4 cat meows 4 dog barks 4 time for foo! o hello bar cat meows 4 dog barks 4 begone! cat meows 5 dog barks 5 Segmentation fault (core dumped) I'm not really sure why it seg faults at the end? Any comments/insights are deeply appreciated.

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• iPhone: Use a view as a transparent overlay with closing button

  - by axooh

  I've got a map with three bar buttons for different markers to show up in the map. If I click on a bar button, the specific markers are shown in the map, which already works great. Now I would like to show a transparent overlay (popup window) with the description of the markers after I clicked on a bar button with a button to close the overlay again and show the markers (which are set in the background). The function of the bar button: - (IBAction)routeTwo:(id)sender { // The code for the overlay // ... // remove any annotations that exist [map removeAnnotations:map.annotations]; // Add any annotations which belongs to route 2 [map addAnnotation:[self.mapAnnotations objectAtIndex:2]]; [map addAnnotation:[self.mapAnnotations objectAtIndex:3]]; [map addAnnotation:[self.mapAnnotations objectAtIndex:4]]; [map addAnnotation:[self.mapAnnotations objectAtIndex:5]]; } I tried the following possibilities: 1. Using a modal view controller RouteDescriptionViewController *routeDescriptionView = [[RouteDescriptionViewController alloc] init]; [self presentModalViewController:routeDescriptionView animated:YES]; [routeDescriptionView release]; Works great, but the problem is: The map view in the background is not visible anymore (configuring alpha values of the modal view doesn't change anything). 2. Add RouteDescriptionView as a subview RouteDescriptionViewController *routeDescriptionView = [[RouteDescriptionViewController alloc] init]; [self.view addSubview:routeDescriptionView.view]; [routeDescriptionView release]; Works great as well, but the problem here is: I can't configure a close button on the subview to close/remove the subview (RouteDescriptionView). 3. Using UIAlertView Would work as expected, but the UIAlert is not really customizable and therefore not suitable for my needs. Any ideas how to achieve this?

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• ArrayAccess multidimensional (un)set?

  - by anomareh

  I have a class implementing ArrayAccess and I'm trying to get it to work with a multidimensional array. exists and get work. set and unset are giving me a problem though. class ArrayTest implements ArrayAccess { private $_arr = array( 'test' => array( 'bar' => 1, 'baz' => 2 ) ); public function offsetExists($name) { return isset($this->_arr[$name]); } public function offsetSet($name, $value) { $this->_arr[$name] = $value; } public function offsetGet($name) { return $this->_arr[$name]; } public function offsetUnset($name) { unset($this->_arr[$name]); } } $arrTest = new ArrayTest(); isset($arrTest['test']['bar']); // Returns TRUE echo $arrTest['test']['baz']; // Echo's 2 unset($arrTest['test']['bar']; // Error $arrTest['test']['bar'] = 5; // Error I know $_arr could just be made public so you could access it directly, but for my implementation it's not desired and is private. The last 2 lines throw an error: Notice: Indirect modification of overloaded element. I know ArrayAccess just generally doesn't work with multidimensional arrays, but is there anyway around this or any somewhat clean implementation that will allow the desired functionality? The best idea I could come up with is using a character as a separator and testing for it in set and unset and acting accordingly. Though this gets really ugly really fast if you're dealing with a variable depth. Does anyone know why exists and get work so as to maybe copy over the functionality? Thanks for any help anyone can offer.

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