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• Project Euler 79: what am I missing?

  - by Evert

  Hi Guys, I'm not interested in the answer, but I need to be pointed in the right direction Here's problem 79 I first try to analyze the file myself. I've noticed that the number 7 only ever appears as the first digit. This immediately implies that all the numbers containing 7 never overlaps with under numbers (on the left side). Since the questions in project euler always have 1 answer, I believe I'm misunderstanding the question. Do I not have to use all numbers? If I do have to use all numbers, there's many different possible numbers. Where am I going wrong?

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• How do I set an Array in one class with another array in another class in Objective-C

  - by Stef

  Hi Guys, I've populated and array with data like this in one class... PowerClass .h NSMutableArray pickerArray; @property (nonatomic, retain) NSMutableArray pickerArray; - PowerClass .m @synthesize pickerArray; @implementation NSMutableArray *array = [[NSArray alloc] initWithObjects:@"stef", @"steve", @"baddamans", @"jonny", nil]; pickerArray = [NSMutableArray arrayWithArray:array]; And I'm trying to set the Array in another class WeekClass .h PowerClass *powerClass; NSMutableArray *pickerData; @property (nonatomic, retain) NSMutableArray pickerData; @property (nonatomic, retain) PowerClass *powerClass; WeekClass .m @implementation pickerData = [NSMutableArray arrayWithArray:powerClass.pickerArray]; I have no errors or warnings. It just crashes. The NSLog says that the powerClass.PickerArray is Null... I don't know why this is... Please help point me in the right direction... Thanx guys Stef :-)

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• Setup requires .NET 4.0 - System already has .net 4.0

  - by Willem

  Hi all, I created a service which I now want to install to test, I created a setup program from the templates in VS2010. When running the setup program it prompts me to download and install .net fw 4.0, but I already have it installed. I did try to just install the file that I get pointed to (4.0 cliet), but not only does it still not work, it causes vs2010 to throw an unknown error and can't open. I've now uninstalled everything (including vs2010 beta) and started afresh with VS2010 ultimate trial full version, framework 4.0 and win 7 but it still prompts me to install fw 4.0 when I try to run the setup. Can anyone please point me in the right direction? Thanx in advance Willem

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• route finding between two designation on maps in android?

  - by androidbase Praveen

  i want to just find a shortest path between the location on map. we have to pass the location's geopoint then click the button to get direction. it will show the shortest path like a blue line. how to do this? i search about this. many of them import a package com.google.googlenav.*;. where i have to get this? Any Idea???? Edit:got downloaded the Cloudemade API. how to draw the lines between the points.

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• Try-Catch-Throw in the same Java class

  - by Carlos

  Is it possible to catch a method in the current class the try-catch block is running on? for example: public static void arrayOutOfBoundsException(){ System.out.println("Array out of bounds"); } ..... public static void doingSomething(){ try { if(something[i] >= something_else); } catch (arrayOutOfBoundsException e) { System.out.println("Method Halted!, continuing doing the next thing"); } } If this is possible how will it be the correct way to call the catch method? If this is not possible, could anyone point me in the right direction, of how to stop an exception from halting my program execution in Java without having to create any new classes in the package, or fixing the code that produces ArrayOutOfBoundsException error. Thanks in Advance, A Java Rookie

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• Dynamically generate XPath expression using XML data

  - by iHeartGreek

  Hi! I would like to dynamically create XPath expressions in an XSL determined by data in an XML file. (i.e. the XML data is "concatenated" to create an XPath expression). Example of XML data: AAA BBB CCC Example of how I would like the XPath expression to look like: //AAA | //BBB | //CCC And this dynamic generation needs to be done in an XSL file. I am fairly new to XSL (and family) and would appreciate some general direction on how to tackle this problem. Thanks!

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• Incorrect value for sum of two NSIntegers

  - by Antonio

  Hi everybody: I'm sure I'm missing something and the answer is very simple, but I can't seem to understand why this is happening. I'm trying to make an average of dates: NSInteger runningSum =0; NSInteger count=0; for (EventoData *event in self.events) { NSDate *dateFromString = [[NSDate alloc] init]; if (event.date != nil) { dateFromString = [dateFormatter dateFromString:event.date]; runningSum += (NSInteger)[dateFromString timeIntervalSince1970]; count += 1; } } if (count>0) { NSLog(@"average is: %@",[NSDate dateWithTimeIntervalSince1970:(NSInteger)((CGFloat)runningAverage/count)]); } Everything seems to work OK, except for runningSum += (NSInteger)[dateFromString timeIntervalSince1970], which gives an incorrect result. If I put a breakpoint when taking the average of two equal dates (2009-10-10, for example, which is a timeInterval of 1255125600), runningSum is -1784716096, instead of the expected 2510251200. I've tried using NSNumber and I get the same result. Can anybody point me in the right direction? Thanks! Antonio

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• (VB.NET + WPF) Drag + Drop (to allow user sorting) of stackpanel elements within a Scrollviewer?

  - by Matt H.

  I have good model (I think!) for how to allow a user to drag an element in a stackpanel and reposition it to another location within the stackpanel. However, my Stackpanel is placed within a ScrollViewer, like this (generalized): <ScrollViewer> <StackPanel> ....First item ....Second item ....Third item ....Etc. </StackPanel> <ScrollViewer> Here is the problem, I wish to simulate the functionality of programs like word, where if I am dragging selected content (or an object) outside the viewable area, the window will scroll in the direction of the mouse to see more places to drop my nifty little object. ...i.e. If I move the mouse to the top of my ScrollViewer while dragging a stackpanel's contents, I want the scrollviewer to slowly move up so I can see more locations to drop my content. Any suggestions? If you can help me solve this, you will be a godsend!

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• Repeated Scene Trees (Java3d / OpenGL)

  - by Jim

  Hello, I want to make a 3d scene that loops around on its self. That is to say, if you keep going in any direction, you will loop back to the other side. My current implementation is so bad, it's embarrassing to admit to it. I redraw the each change twenty-seven times, to make a 3x3x3 scene cube. When the user reaches the end of the middle cube, I jump them over to the other side. Maintaining consistency (let alone performance) is a nightmare. Total Disaster. This doesn't seem like it would be an unusual request, so I'm wondering if anyone knows of a more legit solution. Thanks!

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• Stuffed Animal In OpenGL

  - by anon

  I have seen metal/plastic/water/fire/... shaders for OpenGL. However, it it possible to render something fur-like, say a stuffed animal / teddy bear in OpenGL (I know this is possible with renderman / ray tracers, but I want to do it in OpenGl). If you have pointers to GLSl shaders for this, please point me in the right direction. Thanks! [I'm guessing the answer is no since fur requires more than just shaders -- it almost requires creating geometry on the fly -- but I'd love to be proven wrong)]

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• SQLite character encoding for Google Gears

  - by MHD

  We're using jQuery to get a JSON-string from our server (UTF-8 response, also UTF-8 request through jQuery) and put this JSON into a Google Gears WorkerPool. This workerpool processes the JSON and stores it into a Gears database (SQLite). It turns out that, apparently, SQLite stores data using iso-8859-1 rather than UTF-8. Since we're trying to store user names that might contain Cyrillic characters (and others that you might encounter in Europe), this goes horribly wrong. Can anyone tell me how to change the character encoding in either the Gears WorkerPool or the SQLite database that Gears employs? Of course, if I'm looking in the wrong direction with my problem, feel free to offer alternatives! Unfortunately, HTML5 isn't an option as we're supposed to support IE7 primarily.

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• How to start a major iPhone app update in Xcode

  - by Eric

  I have an app in the iPhone app store and have released several minor updates to it. I want to begin work on some major feature additions and reorganization, but don't want to lose the source code of my most recent version in case everything goes horribly wrong. Should I start a new Xcode project from scratch and copy my existing source in? If I do this will I be able to submit the build from this new project as an update or will Apple complain that the build comes from a different Xcode project? I've seen (but not used) Xcode's "Snapshots" and "Source Control" features - are these what I'm looking for? Any help or direction greatly appreciated.

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• HBase schema help

  - by Jody Powlette

  Coming from a SQL Server background, I'm a newbie with regard to HBase, but the technology looks to be a good fit for what we're doing and the cost is definitely right! I need to maintain a list of log entries which normally I would create in an RDBS as: create table Log ( UserID int, SiteID int, Page varchar(50), Date smalldatetime ) where one user may have 0 or 1000 rows in this simple table. Typical queries would be to find all the rows for one user or all the rows for one user on one site. How does this translate into a "map" in HBase where there is no "row key" AND the same (SiteID,Page) may appear many times. My first thought is that UserID is a row key, but I still don't understand "column families" and the other terminology well enough to understand how to setup the table to hold this data where the one UserID can have many (SiteID,Page,Date) "rows". Any direction is appreciated!

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• Web App for smartphones in ASPX

  - by Ryan Knoll

  I have been looking around recently to try and find a good place to learn how to start making my website more smartphone friendly when it is visited by an iPhone, android, or blackberry. This is something like what Digg.com does when it is visited by a smartphone. I have found a few tutorials for PHP but none for ASPX, and all I have is windows servers. Could anyone point me in the right direction, and show me were to find a quick run through on how to do something like this? I am a bit lost. :(

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• iPhone: Activate UISlider and set its value to the location of the current touch programatically

  - by carloe

  Is it possible to set an UISlider as first responder and set its current value to the location of the current touch programatically? The way my app is set up I have a UIView container that takes up the whole screen. Inside the container I have another UIView offscreen at the bottom edge (I'll call this bottomBar). Inside the bottomBar there is a UISlider element. Right now, when the user swipes along the bottom edge of the screen the bottomBar the slider it contains slide up. What I am trying to achieve is to activate the UISlider, and set the position of the slider (the value) to the position of the users touch. Is this possible? Could someone please point me in the right direction?

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• Embedding Ruby, calling a function from C

  - by ThePower

  Hi, I'm writing an app that calls ruby code from c. I am having a little difficulty and wondered if anyone could point me in the rite direction. I currently have in my C. #include ruby.h main() { ruby_init(); rb_require("myRubyFile"); rb_funcall(rb_module_new(), rb_intern("RubyFunction"), 0, NULL); } My ruby file is in the same directory as my c file and is called myRubyFile.rb and contains a definition of the function RubyFunction(). This is a cut down of what I actually want to do, just making it more readable for others. I just require some feedback as to whether this is the correct method to call ruby code from my c file. Regards

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• Setting the background colour/highlight colour for a given string range using Core Text

  - by Jasarien

  I have some text laid out using Core Text in my iPhone app. I'm using NSAttributedString to set certain styles within the text for given ranges. I can't seem to find an attribute for setting a background / highlight colour, though it would seem it is possible. I couldn't find an attribute name constant that sounded relevant and the documentation only lists: kCTCharacterShapeAttributeName kCTFontAttributeName kCTKernAttributeName kCTLigatureAttributeName kCTForegroundColorAttributeName kCTForegroundColorFromContextAttributeName kCTParagraphStyleAttributeName kCTStrokeWidthAttributeName kCTStrokeColorAttributeName kCTSuperscriptAttributeName kCTUnderlineColorAttributeName kCTUnderlineStyleAttributeName kCTVerticalFormsAttributeName kCTGlyphInfoAttributeName kCTRunDelegateAttributeName Craig Hockenberry, developer of Twitterrific has said publicly on Twitter that he uses Core Text to render the tweets, and Twitterrific has this background / highlight that I'm talking about when you touch a link. Any help or pointers in the right direction would be fantastic, thanks. Edit: Here's a link to the tweet Craig posted mentioning "Core text, attributed strings and a lot of hard work", and the follow up that mentioned using CTFrameSetter metrics to work out if touches intersect with links.

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• Interacting with RESTful API's via Javascript?

  - by Alex

  Hi there, to start off, I know C++, C#, Python, some Ruby, and basic Javascript. Anyway, my question revolves around how to interact with RESTful API's via Javascript. I haven't been able to find any good examples on various websites, and so I've come here. So my basic question is: How do I interact with RESTful API's via JS? And where can I find out how to implement OAuth in JS? I know how to get my keys and such, just not how to actually code them in. Below is an example of a twitter API status update run from my MAC terminal with curl: curl -u username:password -d "my tweet" http://api.twitter.com/1/statuses/update.json How can I implement this in Javascript (preferably with OAuth authentication)? This would at least start me going in the right direction. Thanks so much!!

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• NHibernate: Many-to-many relationship with field in the relationship table

  - by Fossmo

  I'm scratching my head; I have a Car table and a Customer table that have a many-to-many relationship. In this relationship table I want to add a column that can tell me what kind of relationship this is; is the customer testdriving the car, do he want to buy the car, ect. What I want to end up with is a class Car object that holds a collection of Customers and the relationship information. I might be looking at this the wrong way so feel free to push me in the right direction.

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• How to Encrypt a soap request using a secretkeyspec?

  - by rocks

  I have Web Service client code generated by WSDL2Java. I am trying to encrypt the Soap Envelope specifying a CallbackHandler in the wsdd. I've managed to set a username and password in plain text on the soap request, but I need to use a key instead (I have been given a .key file which seems to be a SecretKeySpec). I load the .key file, read the bytes and then in the CallbackHandler I do the following:- encryptionKey = getBytesFromFile("mykey.key"); WSPasswordCallback pc = (WSPasswordCallback) callbacks[i]; pc.setKey(encryptionKey); But nothing relating to the encryption appears in the soap request and I get an error stating that pwd must be set. I'm totally stuck. Can anyone point me in the right direction?

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• What effects drawing charts/diagrams from $_SESSION data under php5, which worked under php4?

  - by ste_php

  Hello, I have a script generating 3 diagrams from $_SESSION variables which work fine under php4 with register_globals = off, but when I parse the same script as php5 I get no diagram. The diagrams a drawn from GD libary and it works, if I set the data into an Array (manually filled) within the script file. But I need a way to get it work on php5, without much changes. Are there any SESSION settings or php-settings which might interfere with my script. I already checked a lot of the php-settings (changing php.ini over and over again), but found nothing what brings me the diagrams back. Hopefully someone of you could kick me into the right direction. Any Ideas? Thanks a lot.

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• Program for HID USB Scale

  - by Alex

  Hi guys, I'm looking for a program that can read the weight on a USB scale, namely the Pelouze 10lb USB Portable Scale. I thought it would have a virtual COM port driver but instead, it uses HID drivers. I've been searching for a whole month for a program that can help me transfer the reading of the scale to Microsoft Excel. Can someone help me out or point me in the right direction? I am absolutely illiterate to programming. Much gratitude any help given.

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• AJAX call in a continuously loop?

  - by Mestika

  Hi, I want to create some kind of AJAX script or call that continuously will check a MySQL database if any new messages has arrived. When there is a new message in the database, the AJAX script should invoke a kind of alert box or message box. I’m not quite a AJAX expert (yet anyway) and have Googled around to find a solution but I’m having a hard time to figure out where to begin. I imagine that it is kind of the same method that an AJAX chat is using to see if any new chat-message has been send. I’ve also tried to search for AJAX (httpxmlrequest) call in a continuously and infinity loop but still haven’t got a solution yet. I hope there is someone, which can help me with such a AJAX script or maybe nudge me in the right direction. Thanks Sincerely Mestika

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• T-Sql SPROC - Parse C# Datatable to XML in Database (SQL Server 2005)

  - by Goober

  Scenario I've got an application written in C# that needs to dump some data every minute to a database. Because its not me that has written the spec, I have been told to store the data as XML in the SQL Server database and NOT TO USE the "bulk upload" feature. Essentially I just wanted to have a single stored procedure that would take XML (that I would produce from my datatable) and insert it into the database.....and do this every minute. Current Situation I've heard about the use of "Sp_xml_preparedocument" but I'm struggling to understand most of the examples that I've seen (My XML is far narrower than my C Sharp ability). Question I would really appreciate someone either pointing me in the direction of a worthwhile tutorial or helping explain things. EDIT - Using (SQL Server 2005)

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• Extending Ruby, calling a function from C

  - by ThePower

  Hi, I'm writing an app that calls ruby code from c. I am having a little difficulty and wondered if anyone could point me in the rite direction. I currently have in my C. #include ruby.h main() { ruby_init(); rb_require("myRubyFile"); rb_funcall(rb_module_new(), rb_intern("RubyFunction"), 0, NULL); } My ruby file is in the same directory as my c file and is called myRubyFile.rb and contains a definition of the function RubyFunction(). This is a cut down of what I actually want to do, just making it more readable for others. I just require some feedback as to whether this is the correct method to call ruby code from my c file. Regards

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