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📝 storeInsert.

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Rob Rix 2017-12-20 17:19:29 -05:00
parent fd14bb4672
commit 82468ec491
1 changed files with 1 additions and 0 deletions
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src/Data/Abstract/Store.hs
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@ -32,6 +32,7 @@ storeLookup (Address address) = Map.lookup address . unStore
storeLookupAll :: (Ord l, Foldable (Cell l)) => Address l a -> Store l a -> Maybe [a]
storeLookupAll address = fmap toList . storeLookup address
-- | Append a value onto the cell for a given address, inserting a new cell if none existed.
storeInsert :: (Ord l, Semigroup (Cell l a), Pointed (Cell l)) => Address l a -> a -> Store l a -> Store l a
storeInsert (Address address) value = Store . Map.insertWith (<>) address (point value) . unStore