Sounds like a fold to me. Try looking at the doc of either foldl/r/l'
or mapAccum depending on what you want.. Then write a function for
one iteration that returns the value from that iteration combined with
the value from the last iteration
-- Jeff
On Sun, Jun 7, 2009 at 3:44 PM, ptrash
What i am exactly to do is this:
I have a list of pupils (type Pupil = (Name, Grade)) where I store the name of the pupil and which grade he has. No I want to get the number (and average number) of each grade. Something like 10 Pupils have a A (23%), 2 Pupils have a B ( 4 %) etc -- View this message in context: http://www.nabble.com/Change-value-of-a-variable-tp23913404p23914558.html Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com.
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