Cyclist
Cyclist is an efficient cyclic list implemention for Javascript.
It is available through npm
npm install cyclist

What?
Cyclist allows you to create a list of fixed size that is cyclic.
In a cyclist list the element following the last one is the first one.
This property can be really useful when for example trying to order data
packets that can arrive out of order over a network stream.
Usage
var cyclist = require('cyclist')
var list = cyclist(4)
list.put(42, 'hello 42') // store something and index 42
list.put(43, 'hello 43') // store something and index 43
console.log(list.get(42)) // prints hello 42
console.log(list.get(46)) // prints hello 42 again since 46 - 42 == list.size
API
cyclist(size) creates a new buffer
cyclist#get(index) get an object stored in the buffer
cyclist#put(index,value) insert an object into the buffer
cyclist#del(index) delete an object from an index
cyclist#size property containing current size of buffer
License
MIT