15.2 Exercise

[rue]

- modify lookup method so partial matches can be made.

This is my solution, also extended it so user can enter either uppercase or lowercase and it will still find a partial match.

Code: (Objective-C)

-(AddressCard *) lookup: (NSString *) theName
{
    // lookup entry in addressbook, assume EXACT MATCH
    // use brute force lookup
    for (AddressCard *nextCard in book)
    {
        /*
        if ([nextCard.name caseInsensitiveCompare:theName] == NSOrderedSame) {
            return nextCard;
        }
        */
        
        if ([[nextCard.name lowercaseString] rangeOfString:[theName lowercaseString]].location == NSNotFound) {
            // NSLog(@"string not found!");
        } else {
            return nextCard;
        }
    
    }
    return nil;
}