Fast enumeration on an NSIndexSet

Question

Can you fast enumerate a NSIndexSet? if not, what's the best way to enumerate the items in the set?

Answer 1

In OS X 10.6+ and iOS SDK 4.0+, you can use the -enumerateIndexesUsingBlock: message:

NSIndexSet *idxSet = ...

[idxSet enumerateIndexesUsingBlock:^(NSUInteger idx, BOOL *stop) {
  //... do something with idx
  // *stop = YES; to stop iteration early
}];