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• A Good Final High School AP Computer Science Programming Project?

  - by user297663

  Hey guys this question might seem very specific but I am in need of some ideas for a project to do for my last month or so in my AP Computer Science class. I've been looking at some college final ideas and a lot of them just seem plain boring. At first I thought about writing a IRC client in JAVA but I wouldn't really be learning anything "new" that would help me in the future. Then I thought about doing IPhone/touch apps (I don't have an adroid phone and I can easily get my hands on an itouch) but I would need ideas to make apps for that. I want to do something that is going to feel trivial and need some explanation but will also help me in the long run learning new concepts in computer science. If you guys could help out I would greatly appreciate it. I really only have a month to do this project so try to keep the project inside of that range. Also, I don't mind learning new languages. Thanks :)

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• Does Windows 7 have a Kiosk Mode?

  - by Jordan

  I'm writing a Kiosk on a Windows 7 computer. The Kiosk is on a touch screen computer, that will not have a keyboard. The application is a WPF application running the .NET Framework version 3.5. I'm having problems with the progress bar task bar showing up (blinking) at the bottom of the screen. This unfortunately gives the user access to the background operating system. Is there someway to lock a full screen application window into the front of the screen without using it on-top-of-everything mode. Some sort of Kiosk mode, or some tool that was designed for this.

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• What is this event?

  - by Shawn Mclean

  Could someone explain what this C# code is doing? // launch the camera capture when the user touch the screen this.MouseLeftButtonUp += (s, e) => new CameraCaptureTask().Show(); // this static event is raised when a task completes its job ChooserListener.ChooserCompleted += (s, e) => { //some code here }; I know that CameraCaptureTask is a class and has a public method Show(). What kind of event is this? what is (s, e)?

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• HTTPS and HTTParty - Timeout and EOF

  - by ferparra

  Hi all, I'm trying to post something to an HTTPS resource, but it seems it doesn't work. My code look something like this: require 'httparty' class MyClass include HTTParty base_uri "https://mydomain.com:8085/search" basic_auth 'admin', 'changeme' format :xml def mymethod self.class.post('/job', :query => {:search => "*"}) end end As you can see, I've defined an URI with 'https' included, so it should set the use_ssl property for the Net::HTTPS library automatically. For some reason, Net::HTTP is requested, and I never get in touch with the server, so I end up with an EOF. Any clues?

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• Calculating holidays

  - by Ralph Shillington

  A number of holidays move around from year to year. For example, in Canada Victoria day (aka the May two-four weekend) is the Monday before May 25th, or Thanksgiving is the 2nd Monday of October (in Canada). I've been using variations on this Linq query to get the date of a holiday for a given year: var year = 2011; var month = 10; var dow = DayOfWeek.Monday; var instance = 2; var day = (from d in Enumerable.Range(1,DateTime.DaysInMonth(year,month)) let sample = new DateTime(year,month,d) where sample.DayOfWeek == dow select sample).Skip(instance-1).Take(1); While this works, and is easy enough to understand, I can imagine there is a more elegant way of making this calculation versus this brute force approach. Of course this doesn't touch on holidays such as Easter and the many other lunar based dates.

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• Android views' borders issue on some devices

  - by htafoya

  Hi there, Some users have been reporting border alignment issues on some android components such as the alert popup or the editTexts. This is happening on the Samsung Galaxy Apollo (200x400) and the HTC Pro Touch (480x640) devices. I cannot replicate that because i don't own those devices and in the Samsung Galaxy S and emulator everything looks just right. I think that the problem is the dpi or resolution of the device (because the edittext background is a single .9.png so image should look ok); however I am not sure if the supports-screens tag is the solution. Also, application was developed using Api 3 (v1.5) and supports-screens was not yet supported, nor the screen-size resource qualifier. The style used for the alerts and editText is the phone default. Could the problem be something related with the theme applied to the phone by the user? Thanks in advance!, I show some images given to me showing the problem: //EDIT: I can't post images because i am new; i will put a link: borders issue link img

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• The use of GROUP BY in MySQL

  - by Gustav Bertram

  I'm fishing for a comprehensive and canonical answer for the typical "mysql group by?" question. Here is some sample data: TABLE A +------+------+----------+-----+ | id | foo | bar | baz | +------+------+----------+-----+ | 1 | 1 | hello | 42 | | 2 | 0 | apple | 96 | | 3 | 20 | boot | 11 | | 4 | 31 | unicorn | 99 | | 5 | 19 | pumpkin | 11 | | 6 | 88 | orange | 13 | +------+------+----------+-----+ TABLE B +------+------+ | id | moo | +------+------+ | 1 | 1 | | 2 | 99 | | 3 | 11 | +------+------+ Demonstrate and explain the correct use of the GROUP BY clause in MySQL. Touch upon the following points: The use of MIN, MAX, SUM, AVG The use of HAVING Grouping by date, and ranges of dates Grouping with an ORDER BY Grouping with a JOIN Grouping on multiple columns Bonus points for references to other great answers, the MySQL online manual, and online tutorials on GROUP BY.

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• Float multiple fixed-width / varible-height boxes into 2 columns

  - by Jeremy H

  I'll try to explain this as best I can. I have multiple divs that are fixed-width but variable height. I want to float these boxes into two columns inside a fixed-width container. What happens when a give them all a float: left value, I get something like this: ######### ######### # box 1 # # box 2 # ######### # ..... # ......... # ..... # ......... ######### ######### ######### # box 3 # # box 4 # # ..... # # ..... # ######### ######### ######### ######### # box 5 # # box 6 # # ..... # ######### # ..... # ######### (The periods are white space) What I really would really like is the top of box 3 to touch the bottom of box 1. Any easy way to acheive this?

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• Drag and drop + custom drawing in Android

  - by Rich

  I am working on something that needed custom drag-and-drop functionality, so I have been subclassing View, doing a bunch of math in response to touch events, and then rendering everything manually through code on the canvas in onDraw. Now, the more functionality I add, the more the code is growing out of control and I find myself writing a ton more code than I would expect to write in a high level environment like Android. Is this how it's done, or am I missing something? If I'm not doing anything fancy in the UI, the framework handles the majority of my interactions. Built-in controls handle the touches and drags, and my code is pretty much limited to business logic and data. Is there a way to leverage the power of some of the UI controls and things like animations while also doing some of it manually in the onDraw canvas? Is there an accepted standard of when to use one or the other (if indeed the two approaches can be mixed)?

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• iPhone CSS and Display Testing

  - by Philip Arthur Moore

  Hi All. I recently coded and launched a website that displays consistently across Chrome, Firefox, Opera, IE8, IE7, and Safari. According to site visitors, though, the signup forms at the top and bottom of the site are mangled on the iPhone. I do not own an iPhone and I rarely test sites on the iPhone, and I would really hate to purchase it or an iPod Touch for the sake of occasional CSS/display testing. Question: is there a site online or a program I can use (I'm on Windows 7) for iPhone testing? An alternative question might be why the signup forms aren't displaying properly on the iPhone, when they look fine in all other browsers and a few other mobile devices that I've used? Many thanks.

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• Optimising (My)SQL Query

  - by Simon

  I usually use ORM instead of SQL and I am slightly out of touch on the different JOINs... SELECT `order_invoice`.*, `client`.*, `order_product`.*, SUM(product.cost) as net FROM `order_invoice` LEFT JOIN `client` ON order_invoice.client_id = client.client_id LEFT JOIN `order_product` ON order_invoice.invoice_id = order_product.invoice_id LEFT JOIN `product` ON order_product.product_id = product.product_id WHERE (order_invoice.date_created >= '2009-01-01') AND (order_invoice.date_created <= '2009-02-01') GROUP BY `order_invoice`.`invoice_id` The tables/ columns are logically names... it's an shop type application... the query works... it's just very very slow... I use the Zend Framework and would usually use Zend_Db_Table_Row::find(Parent|Dependent)Row(set)('TableClass') but I have to make lots of joins and I thought it'll improve performance by doing it all in one query instead of hundreds... Can I improve the above query by using more appropriate JOINs or a different implementation? Many thanks.

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• iPhone Input with Stacked Views

  - by Forrest

  Hi, I've got a situation in an iphone application where buttons are not receiving input as I expect. Here's the setup: ViewMain - The main view full of various images and labels ViewOverlay - A HUD like overlay view with two UIButton objects. To create my scene I do the following: viewController.view = ViewMain [ViewMain addsubview:ViewOverlay] This view renders as expected, with ViewOverlay correctly rendered ontop of ViewMain. However the two buttons found inside ViewOverlay do not receive touch events and can not be pressed. Tapping them does nothing at all. I very well may be going about this in the entirely wrong direction. Any ideas?

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• Installing app on Devices(iPhone/iPod)

  - by Shakti

  Hi, I have developed an application for iPhone and iPod touch. Now i want to install that app on the device. I have created a provisioning profile for the particular device. My query is that, now to install the app on a device I have to add the provisioning profile of that device to xcode and after selecting the developer in build option in project info pane i build the project and send the build and provisioning profile to the user. Is there any to install the app without doing the above task of building the project with the provisioning profile. Means i have a build of an app and a newly downloaded provisioning profile. I will send the user both build and profile in a zip file. will the user be able to install the app on his/her device?

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• Get touches from UIScrollView

  - by Peter Lapisu

  Basically i want to subclass UIScrollView and hande the touches, however, the touch methods dont get called (i searched the web for a solution and i found out people pointing to override the hit test, what i did, but with no result :( ) .h @interface XScroller : UIScrollView @end .m - (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event { UIView *result = nil; for (UIView *child in self.subviews) { if ([child pointInside:point withEvent:event]) { if ((result = [child hitTest:point withEvent:event]) != nil) { break; } } } return result; } - (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { NSLog(@"BEGAN"); [super touchesBegan:touches withEvent:event]; } - (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { NSLog(@"MOVED"); [super touchesMoved:touches withEvent:event]; } - (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { NSLog(@"ENDED"); [super touchesEnded:touches withEvent:event]; } - (void) touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event { NSLog(@"CANCELED"); [super touchesCancelled:touches withEvent:event]; } none of the - (void) touches* methods get called, the scrolling works ok

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• Ending tail -f started in a shell script

  - by rangalo

  I have the following. A Java process writing logs to the stdout A shell script starting the Java process Another shell script which executes the previous one and redirects the log I check the log file with the tail -f command for the success message. Even if I have exit 0 in the code I cannot end the tail -f process. Which doesn't let my script to finish. Is there any other way of doing this in Bash? The code looks like the following. function startServer() { touch logfile startJavaprocess > logfile & tail -f logfile | while read line do if echo $line | grep -q 'Started'; then echo 'Server Started' exit 0 fi done }

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• Testing if a UI element is hidden in an OCUnit test

  - by Logan Serman

  I have a button that is hidden under certain circumstances that I wish to test. The button is hidden with [theButton setHidden: YES] in the viewDidLoad method if it is appropriate. For simplicity, lets say that the button is hidden when the buttonIsHidden property is set to true in the view controller. Right now I am trying the following: self.viewController = [[ViewController alloc] init]; self.viewController.buttonIsHidden = YES; [self.viewController loadView]; UIButton *theButton = [...] // function I wrote to retrieve the button based on it's touch up inside action if (theButton) { NSLog(@"%c", theButton.hidden); return (theButton.hidden == true) } return NO; It looks like the hidden property is not what it should be, the NSLog lines from the above code are blank. But, if I output another property like the height, it outputs the correct value so I know it is getting the right button. How do I access the hidden property of the button in this case?

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• .NET Conditional Callback on a type.

  - by Mahesh

  I have a stock price which changes by nature all the time. And, there will be many users who wants to buy that stock. Let's say that the stock price is started at 10 and let's say, 30 people bid for 10.98, 20 people bid for 7.45, 100 people bid for 8.99. During the day, the stock price can touch any of these values, and if that happens, I want to execute all the orders for users who quoted that price. Technically, I am storing in a List. Whenever the price changes, I am checking against all the values in the list and executing those that satisfy the quoted price. Class Bids { string stockname; double quote; } Is there any better alternative way to callback the satisfied items in the list rather than checking all the items whenever there is a change?? If storing in a list is not right way of doing it, let me know the best way.

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• Best way to perform authentication on every request

  - by Nik

  Hello. In my asp.net mvc 2 app, I'm wondering about the best way to implement this: For every incoming request I need to perform custom authorization before allowing the file to be served. (This is based on headers and contents of the querystring. If you're familiar with how Amazon S3 does rest authentication - exactly that). I'd like to do this in the most perfomant way possible, which probably means as light a touch as possible, with IIS doing as much of the actual work as possible. The service will need to handle GET requests, as well as writing new files coming in via POST/PUT requests. The requests are for an abitrary file, so it could be: GET http://storage.foo.com/bla/egg/foo18/something.bin POST http://storage.foo.com/else.txt Right now I've half implemented it using an IHttpHandler which handles all routes (with routes.RouteExistingFiles = true), but not sure if that's the best, or if I should be hooking into the lifecycle somewhere else? Many thanks for any pointers. (IIS7)

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• Updating rows using "in" operator in "where" clause

  - by doublep

  Hi. I stumbled upon SQL behavior I don't understand. I needed to update several rows in a table at once; started with just finding them: SELECT * FROM some_table WHERE field1 IN (SELECT ...) This returned a selection of about 60 rows. Now I was pretty confident I got the subquery right, so I modified the first part only: UPDATE some_table SET field2 = some_value WHERE field1 IN (SELECT ...) In other words, this was exactly as the first query after the WHERE. However, it resulted in 0 rows updated, whereas I would expect those 60. Note that the statement above would change field2, i.e. I verified that some_value was not present in the selected rows. The subquery was a modestly complicated SQL piece with 2 (different) tables, 1 view, joins and its own WHERE clause. In case this matters, it happened with Oracle Database 10g. So, the question is, why UPDATE didn't touch the rows returned by SELECT?

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• Which is the UI technology of the future considering: eye-candy-effect, interactivity (gestures, voc

  - by user193655

  If you had to write a next-gen application, in which on the surface (UI) you need some "futuristic features", by considering the following aspects which is the choice you'd make? 1) eye-candy: cool UI, 3D, Effects, nice graphics, sound transitions... 2) user interaction: not only mouse and keyboard but touch, voice and more.... + user interactivity aspect, which is the technology you'd choose? 3) X-platform: this is to have some X-platform discussion. Of course single platform technologies (as WPF) have may be some more power, anyway in a general discussion considering X-platform as a resource is important 4) available components: of course the coolest technology with no available components is may be an option for a component developer but not for an application developer My question is generic, but anyway * have in mind data-driven apps, not pure multimedia apps, videogames, ....

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• dynamic 404.jsp using struts

  - by Kapsh

  I would like to display an intelligent 404 page with some application data. Currently, there is a 'dumb' jsp, so I just forward to the view and I am done with it. But now I guess I really need to forward to an action so that I can set some more data to display on the error.jsp. How do I do it through configuration via struts-config? I need congifuration because I do not want to touch any individual files that might be forwarding to the existing view. I tried doing the fol, but I get an error and I dont see anything in the log. So currently, <forward name="ErrorView" path="/Error404.jsp" type="org.apache.struts.action.ActionForward"> </forward> What I want: <forward name="ErrorView" path="/errorAction.do" type="org.apache.struts.action.ActionForward"> </forward>

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• Session troubles when used on BT hosting

  - by YsoL8

  Hello I have developed a site for a client with a pre-existing BT hosting package. Since going live there has been a problem where $_session loses it's data between pages. I have previously fixed the problem, but somehow it has become unfixed. Last time this problem happened, my research indicated that there is something funny with BT's setup when using sessions, and that article provided this code: if(ini_get('register_globals') == 1) if(is_array($_SESSION)) foreach(array_keys($_SESSION) as $var_to_kill) unset($$var_to_kill); Which even though it looks broken to me, did in fact reduce the problem to a very low level. (i.e one drop out a day). However, today my client is in touch again and surprise surprise, the problem is back. Does anyone know of a solution? (My client has already stated they will not change hosts!) Oliver

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• Accessing variable from ARGV

  - by snaken

  I'm writing a cPanel postwwwact script, if you're not familiar with the script its run after a new account is created. it relies on the user account variable being passed to the script which i then use for various things (creating databases etc). However, I can't seem to find the right way to access the variable i want. I'm not that good with shell scripts so i'd appreciate some advice. I had read somewhere that the value i wanted would be included in $ARGV{'user'} but this simply gives "root" as opposed to the value i need. I've tried looping through all the arguments (list of arguments here) like this: #!/bin/sh for var do touch /root/testvars/$var done and the value i want is in there, i'm just not sure how to accurately target it. There's info here on doing this with PHP or Perl but i have to do this as a shell script. EDIT Ideally i would like to be able to call the variable by something other than $1 or $2 etc as this would create issues if an argument is added or removed Any ideas?

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• How to handle customers with multiple addresses in CakePHP

  - by Ryan

  I'm putting together a system to track customer orders. Each order will have three addresses; a Main contact address, a billing address and a shipping address. I do not want to have columns in my orders table for the three addresses, I'd like to reference them from a separate table and have some way to enumerate the entry so I can determine if the addressing is main, shipping or billing. Does it make sense to create a column in the address table for AddressType and enumerate that or create another table - AddressTypes - that defines the address enumeration and link to that table? I have found other questions that touch on this topic and that is where I've taken my model. The problem I'm having is taking that into the cakePHP convention. I've been struggling to internalize the direction OneToMany relationships are formed - the way the documentation states feels backwards to me. Any help would be appreciated, Thanks!

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• Reference book on Ruby on Rails social network site for novices

  - by Christopher

  Hey, so I am a novice programmer who has only worked with HTML, CSS, and a touch of Java a couple of years ago. I am looking to try to get a social network site up and running on Ruby on Rails and was looking at RailsSpace: Building a Social Networking Website with Ruby on Rails (Addison-Wesley Professional Ruby Series) - Paperback (July 30, 2007) by Michael Hartl. This was published in 2007, however, and the newer reviews say it is not very helpful. Does anyone know if there are any new publications out there that walk you through building a social network site while teaching you the code(rather than just using a out of the box program)? Thanks

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