Method Array.count()

Method count: int count(array|mapping|multiset haystack, mixed needle)
mapping(mixed:int) count(array|mapping|multiset haystack)
Description: Returns the number of occurrences of needle in haystack . If the optional needle argument is omitted, count instead works similar to the unix command sort|uniq -c, returning a mapping with the number of occurrences of each element in haystack . For array or mapping haystack s, it's the values that are counted, for multisets the indices, as you'd expect.
See also: String.count , search , has_value