#1189: Add First and Last wrappers around Maybe to Data.Monoid
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Reporter: jyasskin | Owner:
Type: proposal | Status: new
Priority: normal | Milestone: Not GHC
Component: libraries/base | Version: 6.6
Severity: normal | Keywords:
Difficulty: Unknown | Testcase:
Architecture: Unknown | Os: Unknown
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First and Last `mappend` to the first and last non-Nothing elements of the
input. These instances seem to fit with the other simple instances in this
file and are useful, for example, to turn foldMap into findFirst or
findLast, or to get a really trivial Writer monad.
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1189>
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