:: a -> [(a, b)] -> b package:yesod-paginator

lookupJust :: (Eq a, Partial) => a -> [(a, b)] -> b
yesod-paginator Yesod.Paginator.Prelude
lookupJust key = fromJust . lookup key
lookup :: Eq a => a -> [(a, b)] -> Maybe b
yesod-paginator Yesod.Paginator.Prelude
lookup key assocs looks up a key in an association list. 
>>> lookup 2 [(1, "first"), (2, "second"), (3, "third")]
Just "second"