node lru chache
===

what is node lru [cache][1]? Anyone can explain how to implmenet it? Lets say I have three layers, client-midlayer(handle calls)-backend(mongoDB), and the lru cache should be implemented in the midlayer.

Would be nice is there is a simple example just showing how it works! Thanks in advance.


  [1]: https://github.com/isaacs/node-lru-cache/