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• Can mouseenter be made to not fire in IE on DOMready?

  - by mrclay

  jQuery emulates IE's mouseenter event on non-IE browsers. In IE, however, mouseenter is being triggered when the page loads (maybe due to jQuery's use of doScroll in the $.ready implementation), even if the mouse is not moved at all. This doesn't happen in other browsers and definitely doesn't follow Microsoft's own spec, which says (emphasis mine): The event fires only if the mouse pointer is outside the boundaries of the object and the user moves the mouse pointer inside the boundaries of the object. If the mouse pointer is currently inside the boundaries of the object, for the event to fire, the user must move the mouse pointer outside the boundaries of the object and then back inside the boundaries of the object. This only becomes an issue of usability if hover (or the hoverIntent plugin) is applied to a navigational item to display a drop down or "mega-menu": In IE, mouseenter will fire immediately after $.ready, obscuring the content with the menu. I've put together a demonstration of both the mouseenter inconsistency and the usability issue it creates.

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• Remove Custom UINavigationBar

  - by Lithium

  Hi, I've customized my UINavigationBar with an image like that : @implementation UINavigationBar (CustomImage) - (void)drawRect:(CGRect)rect { UIImage *image = [UIImage imageNamed: @"NavigationBar.png"]; [image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)]; } @end When I launch a video my custom NavigationBar (with the picture) is on the top or I would like to have the default navigationBar style when I'm playing a video. I tried to hide the navigationBar with [self.navigationController setNavigationBarHidden:YES animated:animated]; but it just remove the navigationBar in my controller but I still have the NavigationBar.png when I'm playing a video. I tried to set the barstyle but it doesn't work either ... self.navigationController.navigationBar.barStyle = UIBarStyleDefault; Could you help me ?

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• Java Searchable JTree

  - by Studer

  I'm trying to use the Searchable JTree from girishchavan on a FileSystemModel from Sun. It didn't work the first time because Sun's Node implementation is a File so I transform it into DefaultMutableTreeNode to be compatible with Searchable JTree. I also edited Searchable JTree to match the path of a file. But it still doesn't work. As far as I can see, it seems that the Searchable JTree only detects the root of the original JTree and cannot go further. Maybe the Nodes are not bind to each others even if they display correctly in a JTree. How can I make it compatible ?

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• Vehicle 2 Vehicle Communication Questions

  - by pinnacler

  I have a rare opportunity to meet the man in charge of implementing vehicle 2 vehicle communication for the US Department of Transportation with 2 others in a few hours. Do YOU have any questions for him? I know this is a little outside the normal, but this is a 'reverse' thread and I felt he has some great knowledge on the subject that I want to share with this community. I'll post his answers later today to his questions. Ask about V2V implementation, privacy issues, use cases, or if you've thought of a great way to use V2V and want me to share it with him, he can at least think about it. He is in charge of panel that creates the standard. Or anything else...

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• OpenMP + SSE gives no speedup

  - by Sayan Ghosh

  Hi, My Professor found out this interesting experiment of 3D Linearly separable Kernel Convolution using SSE and OpenMP, and gave the task to me to benchmark the statistics on our system. The author claims a crazy 18 fold speedup from the serial approach! Might not be always, but we were expecting at least a 2-4 times speedup running this on a Dual Core Intel. http://software.intel.com/en-us/articles/16bit-3d-convolution-sse4openmp-implementation-on-penryn-cpu/#comment-41994 Alas, we could find exactly no speedup. The serial code performs always better, with or without OpenMP. I am using Linux, and observed a certain trend...when no other processes are running on the system, after a while the loadavg starts increasing, and the the %CPU utilization falls down. Another probable false positive which I ran into accidentally...I started the program, then immediately paused it. Then I ran it on background with bg, and saw a speedup of more than 2. This happens all the time! Any advice would be great. Thanks, Sayan

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• What's the difference between the 'DES' class and The 'DESCryptoServiceProvider' class?

  - by IbrarMumtaz

  All I can make out is that one of them is the BC for all 'DES' algorithms to be derived from and the later is a wrapper for the Cryptographic service provider implementation of the DES algorithm. The reason why I ask is that I am going over .Net Security and the MS official training book simply refers to the DES class but the another official MS book refers to the DESCrypto' class. What's the difference between these two? When would you use either of them? What do I need to know as far as the 70-536 exam is concerned. I am asking my question from an educational P.O.V as far as the 70-536 exam is concerned. Thanks In Advance. Ibrar

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• Calculating Percentiles (Ruby).

  - by zxcvbnm

  My code is based on the methods described here and here. def fraction?(number) number - number.truncate end def percentile(param_array, percentage) another_array = param_array.to_a.sort r = percentage.to_f * (param_array.size.to_f - 1) + 1 if r <= 1 then return another_array[0] elsif r >= another_array.size then return another_array[another_array.size - 1] end ir = r.truncate another_array[ir] + fraction?((another_array[ir].to_f - another_array[ir - 1].to_f).abs) end Example usage: test_array = [95.1772, 95.1567, 95.1937, 95.1959, 95.1442, 95.061, 95.1591, 95.1195, 95.1065, 95.0925, 95.199, 95.1682] test_values = [0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0] test_values.each do |value| puts value.to_s + ": " + percentile(test_array, value).to_s end Output: 0.0: 95.061 0.1: 95.1205 0.2: 95.1325 0.3: 95.1689 0.4: 95.1692 0.5: 95.1615 0.6: 95.1773 0.7: 95.1862 0.8: 95.2102 0.9: 95.1981 1.0: 95.199 The problem here is that the 80th percentile is higher than the 90th and the 100th. However, as far as I can tell my implementation is as described, and it returns the right answer for the example given (0.9). Is there an error in my code I'm not seeing? Or is there a better way to do this?

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• RavenDB-Embedded Unstable In Cooperation With ASP .Net Web API Using 2-Tier Architecture

  - by Mohsen Alikhani

  My application is used RavenDB-Embedded Unstable 1.2.2127 that it's intracted with ASP .Net Web API in the separated assemblies. When I use "UseEmbeddedHttpServer = true" on the document store, first time I send a request to RavenDB, it executes properly but when I try for the second time my application displays Raven Studio. However, if UseEmbeddedServer setting be removed then my application will be running without any problems. My RavenDB is configured with the following codes in data tier : this.documentStore = new EmbeddableDocumentStore { ConnectionStringName = "RavenDB", UseEmbeddedHttpServer = true } and implementation of Web.config have these settings in the service tier : <connectionStrings> <add name="RavenDB" connectionString="~\App_Data\RavenDatabase" /> </connectionStrings> Is there a setting I missed?

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• Defend zero-based arrays

  - by DrJokepu

  A question asked here recently reminded me of a debate I had not long ago with a fellow programmer. Basically he argued that zero-based arrays should be replaced by one-based arrays since arrays being zero based is an implementation detail that originates from the way arrays and pointers and computer hardware work, but these sort of stuff should not be reflected in higher level languages. Now I am not really good at debating so I couldn't really offer any good reasons to stick with zero-based arrays other than they sort of feel like more appropriate. I am really interested in the opinions of other developers, so I sort of challenge you to come up with reasons to stick with zero-based arrays!

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• C String literals: Where do they go?

  - by Chris Cooper

  I have read a lot of posts about "string literals" on SO, most of which have been about best-practices, or where the literal is NOT located in memory. I am interested in where the string DOES get allocated/stored, etc. I did find one intriguing answer here, saying: Defining a string inline actually embeds the data in the program itself and cannot be changed (some compilers allow this by a smart trick, don't bother). but, it had to do with C++, not to mention that it says not to bother. I am bothering. =D So my question is, again, where and how is my string literal kept? Why should I not try to alter it? Does the implementation vary by platform? Does anyone care to elaborate on the "smart trick?" Thanks for any explanations.

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• Android: Is it better to start and stop a service each time it is needed or to let a service run and

  - by Flo

  I'm developing an app that checks several conditions during an incoming phone call. The main parts of the app are a BroadcastReceiver listening for Intents related to the phone's status and a local Service checking the conditions. At the moment the service is started each time an incoming call is detected and is stopped when the phone status changed back to idle. Now I'm wondering if this procedure is correct and whether it is reasonable to start and stop the service related to the phone's status. Or would it be better to let the service run regardless of the phone's status and bind/unbind to/from it when needed. Are there any performance issues I would have to think about? Perhaps it is more expensive to start/stop a service than letting it run and communicate with it. Are there any best practices out there regarding the implementation of services?

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• Client Side Development - In Process/Completed Indicator Preferences?

  - by Brian

  Hello, I have been doing more client-side development, managing the UI on the client and submitting data to the server via web service calls. I'm not looking for implementation details, but was curious on developer preferences for displaying an operation in process and what to display when completed or even failed. As a for instance, just for clarification sake, what if you are submitting a profile form's data to a web service. I want to display that something's happening to the user, and give them a message that the form submitted successfully. I've in the past used a twitter-style message (that appears at the top), modal dialogs... I was curious what worked for others and any advice (what did the users like/not like, etc.). Again, technical details aren't needed. Thanks.

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• FileInputStream negative skip

  - by Peter Štibraný

  I'm trying to find more about history of FileInputStream.skip(negative) operation. According to InputStream documentation: If n is negative, no bytes are skipped. It seems that implementation of FileInputStream from Sun used to throw IOException instead, which is now also documented in Javadoc: If n is negative, an IOException is thrown, even though the skip method of the InputStream superclass does nothing in this case. I just tried that, and found that FileInputStream.skip(-10) did in fact return -10! It didn't threw exception, it didn't even return 0, it returned -10. (I've tried with Java 1.5.0_22 from Sun, and Java 1.6.0_18 from Sun). Is this a known bug? Why hasn't it been fixed, or why documentation is kept the way it is? Can someone point me to some discussion about this issue? I can't find anything.

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• TDD and UML together

  - by uther-lightbringer

  Hello, I'm new to TDD approach so I'm wondering if anyone experienced wit this could enlighten me a little. I would like to get some leads how to use UML and TDD methodology together. I've been used to: Design with UML -- Generate skeleton classes (and then keep it synchronized) - Implement and finally Test. I must admit that testing part was the worst one, so I started to look for something else - TDD. So I have some general knowledge what is it about but before I proceed further, I am interested knowing how it goes together with software design especially UML. So when I first design/create test, how can UML fit in? Would it be possible to design classes first, from them create skeleton classes, from them generate Unit tests which would be "filled" before actual implementation of UML pregenerated classes, would this approach break whole TDD? Or is there any other way that would keep UML and TDD together? Thanks everyone for answer.

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• Connection string in app.config in a class library

  - by Copeleto

  I am creating solution and inside I have three projects: A WCF Service Library Project A DataAccess Project (Class Library) A Web site for hosting WCF service The implementation of the service is on the project # 1, but in order to access the DataBase I use a second project that implements the data access using a class library project. That problem is in order to get data access I need to configure a connection string, but that connection string must be configurable in a production environment, I meant in production I am going to deploy the site, which is a very simple project that contains only a reference WCF Service Library Project then a guy from database department will configure the connection string. In development I have an app.config on the data access project but when I do the release that app.config is embedded on the dll. Any ideas how can we achieve our purpose

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• c# binarysearch a list<T> by a member of T

  - by Pygmy

  I have a baseclass Event with a DateTime member TimeStamp. Lots of other event-classes will derive from this. I want to be able to search a list of events (that can contain events with duplicate timestamps) fast, so I'd like to use a binary search. So I started out writing something like this : public class EventList<T> : List<T> where T : Event { private IComparer<T> comparer = (x, y) => Comparer<DateTime>.Default.Compare(x.TimeStamp, y.TimeStamp); public IEnumerable<T> EventsBetween(DateTime inFromTime, DateTime inToTime) { // Find the index for the beginning. int index = this.BinarySearch(inFromTime, comparer); // BLAH REST OF IMPLEMENTATION } } The problem is that the BinarySearch only accepts T (so - an Event type) as parameter, while I want to search based on a member of T - the TimeStamp. What would be a good way to approach this ?

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• XCode newbie: How to find the source code for standard or system libraries?

  - by Jan Hettich

  XCode newbie question here: If I'm programming in C++ or objective C, and I #include or #import a library; e.g. #include <iostream> #import <Cocoa/Cocoa.h> I'm often not sure where to look for these header files in the directory structure on my Mac. In other development environments, you can right click the included or imported filename and have the option to jump to source. Is there such a feature in XCode? Also, for the standard C++ libraries and the Cocoa framework, is the source code for the implementation files available, or only the headers together with compiled link libraries? Thanks!

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• Why Bluetooth needs DBUS way of communication in android?

  - by Rajesh SO

  I am newbie to Android DBUS, recently I was informed that I need to use DBUS to implement Bluetooth in Android, from DBUS documentation I see DBUS is used for communication medium between two applications. In Android apps -apps communication is through intents, if so why do we need DBUS for Bluetooth ? Is that DBUS serves as communication medium for networking (IP) between two apps since it is built over sockets? Please correct me if my understanding is wrong, any more information on DBUS along with Bluetooth implementation in Android is appreciated. Thanks.

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• CSS : overflow : auto will not work under FireFox 3.6.2

  - by Michael Mao

  Hello everyone: This is a CSS related question, I got one good answer from my previous question, which suggested to use some CSS code like overflow:auto together with a fixed height container. And here is my actual implementation : on uni server Please follow the instructions on screen and buy more than 4 kinds of tickets. If you are using IE8, Opera, Safari, Chrome, you would notice that the lower right corner of the page now has a vertical scroll bar, which scrolls the content inside it and prevent it from overflowing. That's what I want to have in this section. Now the problem is, this would not do in FireFox 3.6.2. Am I doing something not compliant to the CSS standard or FireFox has its own way of overflow control? You can inspect the elements on screen, and all controlling functions are done in one javascript using jQuery. All CSS code are kept in a separated file as well. According to the professor, FireFox would be the target browser, although the version was set to 2.0...

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• Variable font height via tables in LaTeX

  - by Hooked

  I've been looking for a more elegant solution to the following typesetting problem. Consider those banners found in print media where the text is aligned like: B I G T E X T small text small text small text m o r e m e d i u m t e x t The font sizes are adjusted so that the height is scaled down for longer lines of text such that each line has equal width. I've written a small script that runs each line separately, compiles, crops the resulting pdf and then \includegraphics each in a table. This gives the desired effect but requires an both an outside script and pdfcrop (which only crops to a white bounding box). Since much of LaTeX is self-aware, I imagine it would be possible to have it recognize the width of a box and scale it appropriately so that any text fits exactly into the desired width. Any thoughts or ideas on how a pure LaTeX implementation might work?

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• What is the most efficient Java Collections library?

  - by dehmann

  What is the most efficient Java Collections library? A few years ago, I did a lot of Java and had the impression back then that trove is the best (most efficient) Java Collections implementation. But when I read the answers to the question "Most useful free Java libraries?" I noticed that trove is hardly mentioned. So which Java Collections library is best now? UPDATE: To clarify, I mostly want to know what library to use when I have to store millions of entries in a hash table etc. (need a small runtime and memory footprint).

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• Objective-C Memory Management: When do I [release]?

  - by Sahat

  I am still new to this Memory Management stuff (Garbage Collector took care of everything in Java), but as far as I understand if you allocate memory for an object then you have to release that memory back to the computer as soon as you are finished with your object. myObject = [Object alloc]; and [myObject release]; Right now I just have 3 parts in my Objective-C .m file: @Interface, @Implementation and main. I released my object at the end of the program next to these guys: [pool drain]; return 0; But what if this program were to be a lot more complicated, would it be okay to release myObject at the end of the program? I guess a better question would be when do I release an object's allocated memory? How do I know where to place [myObject release];?

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• REST, caching, and authorizing with multiple user roles

  - by keithjgrant

  We have a system with multiple different levels of access--sometimes even for the same user as they switch between multiple roles. We're beginning a discussion on moving over to a RESTful implementation of things. I'm just starting to get my feet wet with the whole REST thing. So how do I go about limiting access to the correct records when they access a resource, particularly when taking caching into consideration? If user A access example.com/employees they would receive a different response than user B; user A may even receive a different response as he switches to a different role. To help facilitate caching, should the id of the role be somehow incorporated into the uri? Maybe something like example.com/employees/123 (which violates the rules of REST), or as some sort of subordinate resource like example.com/employees/role/123 (which seems silly, since role/### is going to be appended to URIs all over the place). I can help but think I'm missing something here.

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• Are JSF 2.x ViewScoped Beans Thread Safe?

  - by Mark

  I've been googling for a couple hours on this issue to no eval. WELD docs and the CDI spec are pretty clear regarding thread safety of the scopes provided. For example: Application Scope - not safe Session Scope - not safe Request Scope - safe, always bound to a single thread Conversation Scope - safe (due to the WELD proxy serializing access from multiple request threads) I can't find anything on the View Scope defined by JSF 2.x. It is in roughly the same bucket as the Conversation Scope in that it is very possible for multiple requests to hit the scope concurrently despite it being bound to a single view / user. What I don't know is if the JSF implementation serializes access to the bean from multiple requests. Anyone have knowledge of the spec or of the Morraja/MyFaces implementations that could clear this up?

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• Problems with CGPoint in touches event

  - by Jason

  I'm having some problems with storing variables from my touch events. The warning I get when I run this is that coord and icoord are unused, but I used them in the viewDidLoad implementation, is there a reason why this does not work? Any suggestions? -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [[event allTouches] anyObject]; CGPoint icoord = [touch locationInView:touch.view]; } -(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [[event allTouches] anyObject]; CGPoint coord = [touch locationInView:touch.view]; } - (void)viewDidLoad { if (coord.x > icoord.x) { player.center = CGPointMake(player.center.x + 5, player.center.y); } } Thanks.

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