TreeMap::get

pub fn get(K k) -> Option<V>

use collections::tree::{TreeMap};

Returns the value stored under k, or None when there is none.

Called on a TreeMap value as value.get(…).

Parameters#

Returns#

Option<V>

Examples#

use collections::tree::{TreeMap};
use tests::assert;
let m: TreeMap<string, int> = TreeMap::new();
m.insert("a", 1);
assert!((m.get("a") ?? 0) == 1);
assert!(m.get("b").is_none());

See also#

• TreeMap: An ordered map from keys of type K to values of type V.
• TreeMap::new: Creates an empty map.
• TreeMap::empty: Creates an empty map; the same as TreeMap::new.
• TreeMap::size: Returns the number of entries.
• TreeMap::is_empty: Returns true when the map has no entries.
• TreeMap::clear: Removes every entry.
• TreeMap::iter: Returns an iterator over the entries in ascending key order.
• TreeMap::insert: Stores v under k, replacing any value already there.