count
lib.count
Docs pulled from | This Revision | 21 minutes ago
Count how many elements of list match the supplied predicate
function.
Inputs
pred-
Predicate
Type
count :: (a -> bool) -> [a] -> int
Examples
lib.lists.count usage example
count (x: x == 3) [ 3 2 3 4 6 ]
=> 2
Noogle detected
Implementation
The following is the current implementation of this function.
count =
pred: foldl' (c: x: if pred x then c + 1 else c) 0;