@dibblego Awyea Hole driven development for the win mover (Z _ _ []) = Nothing and mover (Z le x r) = Just (Z (le ++ [x]) (head r) (tail r))
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@dibblego We had to put previous focus on end of lefts to pass our 'unit test' on the front generates [4,1,2,3] 5 [6,7] vs [1,2,3,4] 5 [6,7]
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@dibblego Doh. OK. Back to the drawing board then. -
@clinton_freeman The list [1,2,3,4,5,6] with focus at 4 has zipper Z [3,2,1] 4 [4,5,6] - Show replies
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