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  • What design pattern should be used to create an emulator?

    - by Facon
    I have programmed an emulator, but I have some doubts about how to organizate it properly, because, I see that it has some problems about classes connection (CPU <- Machine Board). For example: I/O ports, interruptions, communication between two or more CPU, etc. I need for the emulator to has the best performance and good understanding of the code. PD: Sorry for my bad English.

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  • How can I create an Outlook PST file using .Net?

    - by brendan
    I'm writing an app that will manipulate Outlook data. I want to make a backup of that data first and am hoping I could just loop through the contact/calendar items, etc and write them out to a PST file. How can I write the contents of 1 or several Outlook folders to a PST using .Net? [vb or c# no matter]

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  • Do you have to create a View Controller to move between views?

    - by Frames84
    I want a single startup view with a button and a welcome screen. When the button is pressed I then want to navigate to a second view which contains a table view and toolbar. I've tried creating a ViewController but my button is shown on all views. I just want a single view, then when it's pressed i go to the next view and the 'real' app starts. Can someone please try and explain the best architecture to do this? (like in chapter 6 of beginning iPhone 3 Development by Dave Mark and Jeff LaMarche ) Thanks

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  • Rails 3 routes and using GET to create clean URLs?

    - by Hard-Boiled Wonderland
    I am a little confused with the routes in Rails 3 as I am just starting to learn the language. I have a form generated here: <%= form_tag towns_path, :method => "get" do %> <%= label_tag :name, "Search for:" %> <%= text_field_tag :name, params[:name] %> <%= submit_tag "Search" %> <% end %> Then in my routes: get "towns/autocomplete_town_name" get "home/autocomplete_town_name" match 'towns' => 'towns#index' match 'towns/:name' => 'towns#index' resources :towns, :module => "town" resources :businesses, :module => "business" root :to => "home#index" So why when submitting the form do I get the URL: /towns?utf8=?&name=townname&commit=Search So the question is how do I make that url into a clean url like: /towns/townname Thanks, Andrew

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  • Should I create protected constructor for my singleton classes?

    - by Vijay Shanker
    By design, in Singleton pattern the constructor should be marked private and provide a creational method retuning the private static member of the same type instance. I have created my singleton classes like this only. public class SingletonPattern {// singleton class private static SingletonPattern pattern = new SingletonPattern(); private SingletonPattern() { } public static SingletonPattern getInstance() { return pattern; } } Now, I have got to extend a singleton class to add new behaviors. But the private constructor is not letting be define the child class. I was thinking to change the default constructor to protected constructor for the singleton base class. What can be problems, if I define my constructors to be protected? Looking for expert views....

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  • How do you create a writable copy of a sqlite database that is included in your iPhone Xcode project

    - by Iggy
    copy it over to your documents directory when the app starts. Assuming that your sqlite db is in your project, you can use the below code to copy your database to your documents directory. We are also assuming that your database is called mydb.sqlite. //copy the database to documents NSFileManager *fileManager = [NSFileManager defaultManager]; NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]; NSString *path = [documentsDirectory stringByAppendingPathComponent:@"mydb.sqlite"]; if(![fileManager fileExistsAtPath:path]) { NSData *data = [NSData dataWithContentsOfFile:[[[NSBundle mainBundle] resourcePath] stringByAppendingString:@"/mydb.sqlite"]]; [data writeToFile:path atomically:YES]; } Anyone know of a better way to do this. This seems to work ...

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  • How do i return a template class from a template function?

    - by LoudNPossiblyRight
    It looks logical but for some reason when i uncomment the last cout line, this code does not compile. How do i return a template class? What do i have to do to this code to make it work? #include<iostream> using namespace std; template <int x> class someclass{ public: int size; int intarr[x]; someclass():size(x){} }; template<int x, int y> int somefunc(someclass<x> A, someclass<y> B){ return ( A.size > B.size ? A.size : B.size); } template<int x, int y, int z> someclass<x> anotherfunc(someclass<y> A, someclass<z> B){ return ( A.size > B.size ? A : B); } int main(){ someclass<5> A; someclass<10> B; cout << "SIZE = " << somefunc(A,B) << endl; //cout << "SIZE = " << (anotherfunc(A,B)).size << endl; //THIS DOES NOT COMPILE return 0; }

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  • How to create following table using MDX Scripting in Sql Server 2005?

    - by Itsgkiran
    Hi! I have the following table , Database Table: BatchID BatchName Chemical Value ---------------------------------------------- BI-1 BN-1 CH-1 1 BI-2 BN-2 CH-2 2 ---------------------------------------------- I need to display the following table. BI-1 BI-2 BN-1 BN-2 ----------------------------------------- CH-1 1 null ------------------------------------------ CH-2 null 2 ------------------------------------------ Here BI-1,BN-1 are two rows in a single columns i need to display chemical value as row of that.Could Please help me to solve this problem. I tried it in Pivot table but i unable to get this. So is there any chance in Reporting Server MDX. Could you please Answer this question. This is high priority to me . Thank You in advance.

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  • is there a native php function to see if one array of values is in another array?

    - by Haroldo
    Is there a better method than loop with strpos()? Not i'm looking for partial matches and not an in_array() type method. example needle and haystack and desired return: $needles[0] = 'naan bread'; $needles[1] = 'cheesestrings'; $needles[2] = 'risotto'; $needles[3] = 'cake'; $haystack[0] = 'bread'; $haystack[1] = 'wine'; $haystack[2] = 'soup'; $haystack[3] = 'cheese'; //desired output - but what's the best method of getting this array? $matches[0] = 'bread'; $matches[1] = 'cheese';

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  • How can I run a function anytime anything is animated with jQuery?

    - by WillyCornbread
    Hi - I have some jQuery animations in my code to slide divs up and down in response to some mouse clicks and other logic. This is all working just peachy, however in IE 6 some of the smaller icon images on the page don't slide along with the rest of the div for some strange reason. They kind of stay put then flicker into the new position and I've chalked this up to an IE6 'feature'. Considering that I have to support IE6, I wanted to just hide the icons anytime an animation started, and show them again when the queue was empty. I couldn't find a reference to any kind of events or hooks into the queue itself and I'd rather not add the hide code, then the show code to every animation as a callback. Thanks if you can help- b

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  • Is passing a Command object/Reader to a function a good idea?

    - by Cyril Gupta
    I've been getting some inexplicable errors (running out of connections from the connection pool) with MySql database with .Net 4 (C#). Till now all my attempts at finding a reason for this have been in vain. Now I also have a situation in which a lock on a table is not cleared for a long time even though all I have been doing is read operations from it. My code looks okay (I've put all readers and connections in using blocks). The only anomaly I have is that I've been passing MySqlCommand and MySqlDataReader objects as parameters to functions who work with them. That doesn't seem like a bad idea for me because it avoids some repetition (DRY!). But since I can't find any other explanation I have to suspect that this is causing the problem. What do you think?

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  • mvc create my own html helper, how can i access httpcontext?

    - by rj
    Hi, I've come across two recommendations for creating custom html helpers: either extend an existing one, or write your own class. I'd prefer to keep my custom code separated, it seems a bit sloppy to extend helpers for a decent-size application. But the benefit I see in extending is that 'This HtmlHelper helper' is passed as a parameter, through which I can get ViewContext.HtmlContext. My question is, how can I roll my own helper class and still have ViewContext.HtmlContext available to me? Thanks!

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  • Why maven requires so many options to create a hello world project,can you recommend a more dedicate

    - by user198729
    Quoted from here: mvn archetype:generate -DgroupId=org.sonatype.mavenbook.simple \ -DartifactId=simple \ -DpackageName=org.sonatype.mavenbook \ -Dversion=1.0-SNAPSHOT And I also have to specify an archetype number... It seems that maven isn't satisfied to be just a Java build tool,but want to control all aspect of developing... Can someone recommend a really dedicated build tool for Java?

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  • Is it possible to create a UINavigationController within a ModalPopup?

    - by aloo
    Hi I have a modalViewController that I am popping up using [self presentModalViewController:myController animated:YES]; I have an event occurring within myController which I would like to result in another controller being pushed onto the navigation stack ON TOP OF myController (which again has been presented modally). How can I do this? I have tried the following from within myController: UINavigationController* navController = [[UINavigationController alloc] initWithRootViewController:self]; NewController* n = [[NewController alloc] init]; [navController pushViewController:n animated:YES]; [n release]; This does not work however....

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  • this is my first time asking here, I wanted to create a linked list while sorting it thanks

    - by user2738718
    package practise; public class Node { // node contains data and next public int data; public Node next; //constructor public Node (int data, Node next){ this.data = data; this.next = next; } //list insert method public void insert(Node list, int s){ //case 1 if only one element in the list if(list.next == null && list.data > s) { Node T = new Node(s,list); } else if(list.next == null && list.data < s) { Node T = new Node(s,null); list.next = T; } //case 2 if more than 1 element in the list // 3 elements present I set prev to null and curr to list then performed while loop if(list.next.next != null) { Node curr = list; Node prev = null; while(curr != null) { prev = curr; curr = curr.next; if(curr.data > s && prev.data < s){ Node T = new Node(s,curr); prev.next = T; } } // case 3 at the end checks for the data if(prev.data < s){ Node T = new Node(s,null); prev.next = T; } } } } // this is a hw problem, i created the insert method so i can check and place it in the correct order so my list is sorted This is how far I got, please correct me if I am wrong, I keep inserting node in the main method, Node root = new Node(); and root.insert() to add.

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  • Drupal 7: Create a taxonomy term for each node and use the node title as the term name

    - by Spre3
    Is there anyway of doing this by using rules or by some custom code? I did try using rules but I can't find a way of adding a new term and set the name as the node title because the [node:title] token is not avilable. I know this is possible using the NAT module but the way this module changes the taxonomy terms hierarchy if you add a term reference field that uses the same taxonomy vocabulary which ruins the whole purpose of what I am trying to do.

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