LRU Cache

Documentation

An implementation of a LRU cache. The cache supports get, put, and remove operations, all of which are O(1). This crate was heavily influenced by the [LRU Cache implementation in an earlier version of Rust's std::collections crate] (https://doc.rust-lang.org/0.12.0/std/collections/lru_cache/struct.LruCache.html).

Example

Below is a simple example of how to instantiate and use a LRU cache.

```rust,no_run extern crate lru;

use lru::LruCache;

fn main() { let mut cache = LruCache::new(2); cache.put("apple".tostring(), "red".tostring()); cache.put("banana".tostring(), "yellow".tostring());

    assert_eq!(*cache.get(&"apple".to_string()).unwrap(), "red".to_string());
    assert_eq!(*cache.get(&"banana".to_string()).unwrap(), "yellow".to_string());
    assert!(cache.get(&"pear".to_string()).is_none());

    cache.put("pear".to_string(), "green".to_string());

    assert_eq!(*cache.get(&"pear".to_string()).unwrap(), "green".to_string());
    assert_eq!(*cache.get(&"banana".to_string()).unwrap(), "yellow".to_string());
    assert!(cache.get(&"apple".to_string()).is_none());

} ```