Yep, I've missed apostrophe's quite a few times. It's was a common cause of infinite loops for me in the past, but I suppose I've trained myself to spot them mo

Yep, I've missed apostrophe's quite a few times. It's was a common cause of infinite loops for me in the past, but I suppose I've trained myself to spot them more quickly. Perhaps zip can be more simply explained by a simple example: out: zip ["a","b","c"] [0,1,2] out: [("a",0),("b",1),("c",2)] out: fmap fst [(0,1),(2,3),(4,5)] out: [0,2,4] out: fmap snd [(0,1),(2,3),(4,5)] out: [1,3,5]