If you're absolutely certain that the lookup always succeeds, then you
can use pattern matching as follows:
where
jr = joinTuples sc x val
key = getPartialTuple is x
Just val = Map.lookup key m
On 6/3/09, Nico Rolle
hi there
heres a code snipped, don't care about the parameters. the thing is i make a lookup on my map "m" and then branch on that return value
probePhase is sc [] m = [] probePhase is sc (x:xs) m | val == Nothing = probePhase is sc xs m | otherwise = jr ++ probePhase is sc xs m where jr = joinTuples sc x (fromMaybe [] val) key = getPartialTuple is x val = Map.lookup key m
the line "jr = joinTuples sc x (fromMaybe [] val)" is kind of ugly because i know that it is not Nothing. is there a better way to solve this? regards _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe