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Revision as of 01:15, 15 September 2010

(*) Find the number of elements of a list.

myLength           :: [a] -> Int
myLength []        =  0
myLength (_:xs)    =  1 + myLength xs
myLength :: [a] -> Int
myLength =  foldr (\n x -> n + 1) 0
This is
length
in
Prelude
.