Exercise 15.2

[tknp]

Came up with this thanks to some pointers I found in another board here.

AddressBook.m

Code: (Objective-C)

#import "AddressBook.h"


@implementation AddressBook

@synthesize bookName, book;

// set up the AddressBook's name and an empty book

-(id) initWithName: (NSString *) name
{
	self = [super init];
	
	if (self) {
		bookName = [NSString stringWithString: name];
		book = [NSMutableArray array];
	}
	
	return self;
}

-(id) init
{
	return [self initWithName: @"NoName"];
}

-(void) addCard: (AddressCard *) theCard
{
	[book addObject: theCard];
}

-(void) removeCard: (AddressCard *) theCard
{
	[book removeObjectIdenticalTo: theCard];
}

-(NSMutableArray *) lookup: (NSString *) theName
{
	NSMutableArray *cardMatches = [[NSMutableArray alloc] init];
	
	for ( AddressCard *nextCard in book )
	{
		// rangeOfString returns the location & length if there is a match. The .length is there as a check to see if the value exists
		if ( ([nextCard.name rangeOfString: theName options: NSCaseInsensitiveSearch]).length )
			[cardMatches addObject: nextCard];
	}
	
	if ([cardMatches count])
		return cardMatches;
	
	return nil;
}

-(int) entries
{
	return [book count];
}

-(void) sort
{
	[book sortUsingComparator: ^(id obj1, id obj2) {
		return [[obj1 name] compare: [obj2 name]];
	} ];
}

-(void) list
{
	NSLog(@"========= Contents of: %@ =========", bookName);
	
	for ( AddressCard *theCard in book )
		NSLog(@"%-20s    %-32s", [theCard.name UTF8String], [theCard.email UTF8String]);
	NSLog(@"=====================================================");
}

@end

snippet from main.m

Code: (Objective-C)

NSString *aName = @"Julia Kochan";
	NSString *aEmail = @"jewls337@axlc.com";
	NSString *bName = @"Tony Iannino";
	NSString *bEmail = @"tony.iannino@techfitness.com";
	NSString *cName = @"Stephen Kochan";
	NSString *cEmail = @"steve@classroomM.com";
	NSString *dName = @"Steve Baker";
	NSString *dEmail = @"sbaker@aol.com";
	
	AddressCard *card1 = [[AddressCard alloc] init];
	AddressCard *card2 = [[AddressCard alloc] init];
	AddressCard *card3 = [[AddressCard alloc] init];
	AddressCard *card4 = [[AddressCard alloc] init];
	
	// Set up a new address book
	
	AddressBook *myBook = [[AddressBook alloc] initWithName: @"Linda's Address Book"];
	AddressCard *myCard;
	NSMutableArray *mySearch;
	
	NSLog(@"Entries in address book after creation: %i", [myBook entries]);
	
	// Now set up four address cards
	
	[card1 setName: aName andEmail: aEmail];
	[card2 setName: bName andEmail: bEmail];
	[card3 setName: cName andEmail: cEmail];
	[card4 setName: dName andEmail: dEmail];
	
	// Add the cards to the address book
	
	[myBook addCard: card1];
	[myBook addCard: card2];
	[myBook addCard: card3];
	[myBook addCard: card4];

	NSLog(@"Entries in address book after adding cards: %i", [myBook entries]);

	
	// List all the entries in the book now
	
	[myBook list];
	
	
	// Look up a person by name
	
	NSLog(@"Looking up: Julia Kochan");
	mySearch = [myBook lookup: @"julia kochan"];
	NSLog(@"Entries matching search: %i", mySearch.count);
	if ([mySearch count])
	{
		for (myCard in mySearch)
			[myCard print];
	}
	else 
		NSLog(@"Not found!");


	// Try a partial lookup
	
	NSLog(@"Looking up: st");
	mySearch = [myBook lookup: @"st"];
	NSLog(@"Entries matching search: %i", mySearch.count);
	if ([mySearch count])
	{
		for (myCard in mySearch)
			[myCard print];
	}
	else 
		NSLog(@"Not found!");
	
    [pool drain];
    return 0;

outputs:

2012-01-22 22:53:26.933 exercise15address[5722:a0f] Entries in address book after creation: 0
2012-01-22 22:53:26.937 exercise15address[5722:a0f] Entries in address book after adding cards: 4
2012-01-22 22:53:26.938 exercise15address[5722:a0f] ========= Contents of: Linda's Address Book =========
2012-01-22 22:53:26.939 exercise15address[5722:a0f] Julia Kochan            jewls337@axlc.com              
2012-01-22 22:53:26.940 exercise15address[5722:a0f] Tony Iannino            tony.iannino@techfitness.com    
2012-01-22 22:53:26.940 exercise15address[5722:a0f] Stephen Kochan          steve@classroomM.com            
2012-01-22 22:53:26.941 exercise15address[5722:a0f] Steve Baker             sbaker@aol.com                  
2012-01-22 22:53:26.941 exercise15address[5722:a0f] =====================================================
2012-01-22 22:53:26.942 exercise15address[5722:a0f] Looking up: Julia Kochan
2012-01-22 22:53:26.942 exercise15address[5722:a0f] Entries matching search: 1
2012-01-22 22:53:26.943 exercise15address[5722:a0f] ====================================
2012-01-22 22:53:26.944 exercise15address[5722:a0f] |                                  |
2012-01-22 22:53:26.944 exercise15address[5722:a0f] |  Julia Kochan                    |
2012-01-22 22:53:26.945 exercise15address[5722:a0f] |  jewls337@axlc.com               |
2012-01-22 22:53:26.945 exercise15address[5722:a0f] |                                  |
2012-01-22 22:53:26.946 exercise15address[5722:a0f] |                                  |
2012-01-22 22:53:26.946 exercise15address[5722:a0f] |                                  |
2012-01-22 22:53:26.947 exercise15address[5722:a0f] |      O                  O        |
2012-01-22 22:53:26.948 exercise15address[5722:a0f] ====================================
2012-01-22 22:53:26.948 exercise15address[5722:a0f] Looking up: st
2012-01-22 22:53:26.949 exercise15address[5722:a0f] Entries matching search: 2
2012-01-22 22:53:26.949 exercise15address[5722:a0f] ====================================
2012-01-22 22:53:26.950 exercise15address[5722:a0f] |                                  |
2012-01-22 22:53:26.951 exercise15address[5722:a0f] |  Stephen Kochan                  |
2012-01-22 22:53:26.951 exercise15address[5722:a0f] |  steve@classroomM.com            |
2012-01-22 22:53:26.952 exercise15address[5722:a0f] |                                  |
2012-01-22 22:53:26.952 exercise15address[5722:a0f] |                                  |
2012-01-22 22:53:26.953 exercise15address[5722:a0f] |                                  |
2012-01-22 22:53:26.953 exercise15address[5722:a0f] |      O                  O        |
2012-01-22 22:53:26.954 exercise15address[5722:a0f] ====================================
2012-01-22 22:53:26.954 exercise15address[5722:a0f] ====================================
2012-01-22 22:53:26.955 exercise15address[5722:a0f] |                                  |
2012-01-22 22:53:26.955 exercise15address[5722:a0f] |  Steve Baker                     |
2012-01-22 22:53:26.956 exercise15address[5722:a0f] |  sbaker@aol.com                  |
2012-01-22 22:53:26.956 exercise15address[5722:a0f] |                                  |
2012-01-22 22:53:26.957 exercise15address[5722:a0f] |                                  |
2012-01-22 22:53:26.958 exercise15address[5722:a0f] |                                  |
2012-01-22 22:53:26.958 exercise15address[5722:a0f] |      O                  O        |
2012-01-22 22:53:26.959 exercise15address[5722:a0f] ====================================