Anish Muttreja ha scritto:
[...]
How about this. Is there a reason why I can't
replace the variables b and c in the type signature of mapReduce with with (IO b')
and (IO c'). b and c can be any types.
mapReduce :: Strategy (IO b') -- evaluation strategy for mapping
-> (a -> IO b') -- map function
-> Strategy (IO c') -- evaluation strategy for reduction
-> ([IO b'] -> (IO c')) -- reduce function
-> [a] -- list to map over
-> (IO c')
Just remember to wrap all values back in the IO monad.
The other day I found, with google, a definizion of mapReduce, that make
use of forkIO to execute piece of IO actions on separate threads.
I can't find it anymore...
Anish
Manlio
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