I love how you've used enumerate and skip together in your nested for loop. I struggled to find a clean solution like this.
Thanks! Yeah, I originally had a very manual nested for-loop set up, but after I got the tests passing, I decided to make an effort to do everything I could with iterators instead :) I've decided that the iterator module in Rust is where most of the magic that I'm missing from Python and Ruby lives.
This was still bothering me, but I found the Itertools crate and the tuple_combinations method. Check out my updated solution in the thread. Itertools makes iterators even more powerful.
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