How to turn an NSArray of strings into an array of unique strings, in the same order?

Question

If you have an NSArray of strings

{ @\"ONE\", @\"ONE\", @\"ONE\", \"TWO\", @\"THREE\", @\"THREE\" }

How would I turn that into

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Answer 1

Hmm.. you could just use a loop ?

NSMutableArray *newarray = [[NSMutableArray alloc] init];
NSString *laststring = nil;
for (NSString *currentstring in oldarray) 
{
   if (![currentstring isEqualtoString:laststring]) [newarray addObject:currentstring];
   laststring = currentstring
}