Chapter 15 Solution: Objective-C Programming Guide Ed. 1. The book says that words doesn't contain proper names, but it does. We can check for non-proper names that match by testing isEqualToString: and having it fail. -Paul Solt

gistfile1.txt

//
//  main.m
//  FindWords
//
//  Created by Paul Solt on 5/5/13.
//  Copyright (c) 2013 Paul Solt. All rights reserved.
//

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[])
{

    @autoreleasepool {
        
        // insert code here...
        NSString *nameString = [NSString stringWithContentsOfFile:@"/usr/share/dict/propernames" encoding:NSUTF8StringEncoding error:NULL];
        
        NSArray *names = [nameString componentsSeparatedByString:@"\n"];
        for(NSString *name in names) {
            NSRange r = [name rangeOfString:@"AA" options:NSCaseInsensitiveSearch];
            
            if(r.location != NSNotFound) {
                NSLog(@"Double AA: %@", name);
            }
        }
        
        // Proper names are in the word file
        NSString *wordString = [NSString stringWithContentsOfFile:@"/usr/share/dict/words" encoding:NSUTF8StringEncoding error:NULL];
        NSArray *words = [wordString componentsSeparatedByString:@"\n"];
        
        // Search for a word that's in both, using case insensitive search
        NSLog(@"Word count: %ld", [words count]);
        for(NSString *name in names) {
            // Pick a proper name then search for it in the word list
            for(NSString *word in words) {
                // if found, print it out
                if([name caseInsensitiveCompare:word] == NSOrderedSame ) {

                    //                    NSLog(@"Name: %@ Word: %@", name, word);
                    
                    // Test only words that are not proper names
                    if(![name isEqualToString:word]) {
                        // must be different by a capital letter. ie. "Glen" to "glen"
                        NSLog(@"Name: %@ Word: %@", name, word);

                        // Stop loop early, because we found the match
                        //  this will run a couple seconds faster.
                        break;

                    }
                }
            }
        }
        
        NSLog(@"Done");
    
    }
    return 0;
}