Difference between revisions of "Solution2.html"
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grandparent s = parent s >>= parent |
grandparent s = parent s >>= parent |
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</haskell> |
</haskell> |
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| + | [[Category:Pages to be removed]] |
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Latest revision as of 08:43, 9 April 2021
parent :: Sheep -> Maybe Sheep
parent s = father s `mplus` mother s
grandparent :: Sheep -> Maybe Sheep
grandparent s = paternalGrandfather s `mplus`
paternalGrandmother s `mplus`
maternalGrandfather s `mplus`
maternalGrandmother s
This next solution will not work. If the sheep has a father and only a maternal grandparent, this function will return Nothing:
grandparent :: Sheep -> Maybe Sheep
grandparent s = parent s >>= parent