Personal tools

99 questions/Solutions/4

From HaskellWiki

< 99 questions | Solutions(Difference between revisions)
Jump to: navigation, search
m
Line 9: Line 9:
 
<haskell>
 
<haskell>
 
myLength :: [a] -> Int
 
myLength :: [a] -> Int
myLength = foldr (\n x -> n + 1) 0
+
myLength = foldr (\x n -> n + 1) 0
 
</haskell>
 
</haskell>
   

Revision as of 01:17, 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 (\x n -> n + 1) 0
This is
length
in
Prelude
.