HashMap::size

pub fn size() -> int

use collections::map::{HashMap};

Returns the number of entries.

Called on a HashMap value as value.size(…).

Returns#

int

Examples#

use collections::map::{HashMap};
use tests::assert;
let m: HashMap<string, int> = HashMap::new();
m.insert("a", 1);
m.insert("b", 2);
m.remove("a");
assert!(m.size() == 1);

See also#

• HashMap: A hash map from keys of type K to values of type V.
• HashMap::with_capacity: Creates an empty map with room for about cap buckets before it grows.
• HashMap::new: Creates an empty map.
• HashMap::is_empty: Returns true when the map has no entries.
• HashMap::capacity: Returns the number of buckets.
• HashMap::clear: Removes every entry, keeping the bucket count.
• HashMap::keys: Returns the keys, in insertion order.
• HashMap::values: Returns the values, in the insertion order of their keys.