Quick and dirty implementation of Shaun Inman's 'Widont' in Cocoa

Widon't

// Example:
//
// Widont makes the last space non-breaking 
// so you don't end up with one word on its 
// own.
//
// Widont makes the last space non-breaking 
// so you don't end up with one word on
// its own.
//
// More Info:
// http://www.shauninman.com/archive/2006/08/22/widont_wordpress_plugin

- (NSString *)stringByReplacingLastSpaceWithNonBreakingSpace
{
    NSRange lastSpaceRange = [self rangeOfString:@" " options:NSBackwardsSearch];
    NSUInteger minNumberOfWordsBeforeReplacing = 4;
    
    if (lastSpaceRange.location!=NSNotFound) {
        NSString *noSpaces = [self stringByReplacingOccurrencesOfString:@" " withString:@""];
    
        if ([self length]-[noSpaces length] >= minNumberOfWordsBeforeReplacing-1) {
            return [self stringByReplacingCharactersInRange:lastSpaceRange withString:@" "];
        }
    }
    
    return self;
}

Added a small tweak to make sure we only make the last space non-breaking if it's not the first space.