TreeMap::get_or

pub fn get_or(K k, V fallback) -> V

use collections::tree::{TreeMap};

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

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

Parameters#

Returns#

V

Examples#

use collections::tree::{TreeMap};
use tests::assert;
let m: TreeMap<int, string> = TreeMap::new();
m.insert(1, "one");
assert!(m.get_or(1, "?") == "one");
assert!(m.get_or(2, "?") == "?");

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.