Re: case-insensitive strings

FROM : Andy Lee
DATE : Thu Oct 10 21:26:38 2002

Oops, of course I realized I had a bug the second after I hit "Send".

Here's a correction:

// (still) completely untested code:

- (NSArray *)keysForCaseInsensitiveString:(NSString *)aString
    inDictionary:(NSDictionary *)aDictionary
{
    NSMutableArray *resultKeys = [NSMutableArray array];
    NSEnumerator *keyEnum = [aDictionary keyEnumerator];
    id key;

    while ((key = [keyEnum nextObject]))
    {
        id value = [aDictionary objectForKey:key];

        if ([value isKindOfClass:[NSString class]])
        {
            if ([value caseInsensitiveCompare:aString] == NSOrderedSame)
            {
                [resultKeys addObject:key];
            }
        }
    }

    return resultKeys; // convert to an immutable NSArray first if you like
}

--Andy
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