13 Aug
2003
13 Aug
'03
6:03 a.m.
Tom Pledger writes:
This is a pretty good way to stop those nasty vague SQL row types at the Haskell border and turn them into something respectable. Perhaps it would even be worth constraining the extracted type to be in DeepSeq
doquery :: (DeepSeq v) => Process -> String -> IO v -> IO [v]
Can you explain what the constraint does here? Although I haven't touched the db interface in the meantime, when/if I do, I'll probably generalise the query function to do a fold, rathen than always accumulate a list: doquery :: Process -> String -> (a -> b -> IO b) -> b -> IO b Tim