Hands on the Rust Crate lru

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

:timing
:sccache 1
:dep lru = "0.10.0"

Timing: true
sccache: true

use lru::LruCache;
use std::num::NonZeroUsize;

let mut cache: LruCache<u64, &str> = LruCache::new(NonZeroUsize::new(2).unwrap());

cache.put(1, "a")

None

cache.put(2, "b")

None

cache

LruCache { len: 2, cap: 2 }

cache.put(2, "beta")

Some("b")

cache.put(3, "hello")

None

cache

LruCache { len: 2, cap: 2 }

cache.get(&1)

None

cache.get(&2)

Some("beta")

cache.get(&3)

Some("hello")