Challenge no. 2 - What is wrong with my code?

Objective-C Programming (2nd Edition) 17. NSArray
1

I’m trying to figure out where I went wrong. I get 1602 matches and items in my result array are duplicated. Can someone help me with this?
Thank you very much.

[code]#import <Foundation/Foundation.h>

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

    // Read in a file as a huge string (ingoring possible errors)
    NSString *nameString = [[NSString stringWithContentsOfFile:@"/usr/share/dict/propernames" encoding:NSUTF8StringEncoding error:NULL] lowercaseString];
    
    NSString *wordString = [[NSString stringWithContentsOfFile:@"/usr/share/dict/words" encoding:NSUTF8StringEncoding error:NULL] lowercaseString];
    
    // Break it into an array of strings
    NSArray *names = [nameString componentsSeparatedByString:@"\n"];
    NSArray *words = [wordString componentsSeparatedByString:@"\n"];
    
    // results will be put here
    NSMutableArray *results = [[NSMutableArray alloc] init];
    
    for(NSString *name in names) {
        
        for(NSString *word in words) {
            if (([name length] == [word length]) && [name isEqualToString:word] == YES){
                    [results addObject:word];
            }
        }
    }
    
    
    // print it
    for (NSString *result in results) {
        NSLog(@"%@", result);
    }
    
    NSLog(@"\nDONE");
    NSLog(@"matches: %lu", [results count]);
    
}
return 0;

}[/code]

2

[quote][code]
…
// Read in a file as a huge string (ingoring possible errors)
NSString *nameString = [[NSString stringWithContentsOfFile:@"/usr/share/dict/propernames" encoding:NSUTF8StringEncoding error:NULL] lowercaseString];

    NSString *wordString = [[NSString stringWithContentsOfFile:@"/usr/share/dict/words" encoding:NSUTF8StringEncoding error:NULL] lowercaseString];

…
[/code][/quote]
Why are you lowercasing?

Try doing it without lowercasing.

...
        // Read in a file as a huge string (ingoring possible errors)
        NSString *nameString = [NSString stringWithContentsOfFile:@"/usr/share/dict/propernames" encoding:NSUTF8StringEncoding error:NULL];
        
        NSString *wordString = [NSString stringWithContentsOfFile:@"/usr/share/dict/words" encoding:NSUTF8StringEncoding error:NULL];
...