lru 0.1.3

# LRU Cache

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[Documentation](https://docs.rs/bloom_filter/)

An implementation of a LRU cache. The cache supports `put`, `get`, and `pop` 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".to_string(), "red".to_string());
        cache.put("banana".to_string(), "yellow".to_string());

        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());
}
```