Maybe with some examples: https://wiki.haskell.org/Zipper https://wiki.haskell.org/Zipper https://en.m.wikipedia.org/wiki/Zipper_(data_structure) https://en.m

Maybe with some examples: https://wiki.haskell.org/Zipper https://wiki.haskell.org/Zipper https://en.m.wikipedia.org/wiki/Zipper_(data_structure) https://en.m.wikipedia.org/wiki/Zipper_(data_structure) To give you an example: the zipper of a list is two lists - one for the elements after the current one (the hole), another for the elements before the current one, plus the current element.