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5 Responses to "Iterators"

1. | Reply Michael Tsai
   Posted 30 Mar 2003 at 11:53am #
   

   Cocoa's iterators are OK, but I've often wished they had:

   - (BOOL)hasNextObject;

   That combined with Obj-C's restrictions on where you can declare variables makes them kind of clumsy to use, IMO.

2. | Reply Michael Tsai's Weblog
   Posted 30 Mar 2003 at 1:43pm #
   

   Iterators

   Erik Barzeski posted about iterators in Cocoa, so I thought I’d give some perspectives from other languages. I think there are really two concepts here: iteration and generation. I don’t know that everyone agrees with these definitions, bu...

3. | Reply andy
   Posted 31 Mar 2003 at 9:31am #
   

   That's not a restriction of Objective C, it's a restriction of C (which Objective C only extends).

   Apple's latest compiler (since Jaguar) uses C99, so you don't have to declare them at the beginning of a block any more.

4. | Reply Michael Tsai
   Posted 31 Mar 2003 at 3:27pm #
   

   I want the enumerator and the object to be in the loop's scope. Does C99 let you declare like so:

   for ( int i = 0; i

5. | Reply andy
   Posted 31 Mar 2003 at 3:38pm #
   

   Nope, that's illegal even in C99 (don't know why).