core :: HashMapKeys :: defaultinit
# View of the keys of a HashMap
private class HashMapKeys[K, V]
super RemovableCollection[K]
# The original map
var map: HashMap[K, V]
redef fun count(k) do if self.has(k) then return 1 else return 0
redef fun first do return self.map._first_item._key
redef fun has(k) do return self.map.node_at(k) != null
redef fun has_only(k) do return (self.has(k) and self.length == 1) or self.is_empty
redef fun is_empty do return self.map.is_empty
redef fun length do return self.map.length
redef fun iterator do return new MapKeysIterator[K, V](self.map.iterator)
redef fun clear do self.map.clear
redef fun remove(key) do self.map.remove_node(key)
redef fun remove_all(key) do self.map.remove_node(key)
end
lib/core/collection/hash_collection.nit:284,1--303,3