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Module: Prelude
Function: foldl1
Type: (a -> a -> a) -> [a] -> a
Description: it takes the first 2 items of the list and applies the function to them, then feeds the function with this result and the third argument and so on. See scanl1 for intermediate results.
Related: foldl, foldr, foldr1, scanl, scanl1, scanr, scanr1

Example 1

Input: foldl1 (+) [1,2,3,4]

Output: 10

Example 2

Input: foldl1 (/) [64,4,2,8]

Output: 1.0

Example 3

Input: foldl1 (/) [12]

Output: 12.0

Example 4

Input: foldl1 (&&) [1>2,3>2,5==5]

Output: False

Example 5

Input: foldl1 max [3,6,12,4,55,11]

Output: 55

Example 6

Input: foldl1 (\x y -> (x+y)/2) [3,5,10,5]

Output: 6.0




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