node-lru

A simple LRU (Least Recently Used) cache implementation.

What it does?

It takes a getter function as first argument and the size of cache (max key value pairs) as the second argument. The function is called when there is a cache miss.

Installation

foo@bar:src$ npm install @skylab/node-lru

Usage

function getValue(key){
  //calculate or get value remotely query/db/ajax etc.
  return value;
}

let LRU = require('@skylab/node-lru')
let cache = new LRU(getValue, 50);

const key = 10;
console.log(cache.get(10)); // getValue function is called to get value and stored in cache , if the cache is full the oldest accessed value is purged

console.log(cache.get(10)); // the value is retrieved from cache.

Alternatives

Todo

• [X] Documentation
• [ ] Add Test