[Haskell-cafe] When folding is there a way to pick out the last point being processed?

[Claude Heiland-Allen]

Casey Hawthorne wrote:
> When folding is there a way to pick out the last point being
> processed?

I came up with these:

safeHead = foldr (const . Just) Nothing
safeLast = foldr (flip mplus . Just) Nothing


Claude
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