numeric-id-map

Data structure that maps entries to numeric ids

``
npm install numeric-id-map
`

![build status](http://travis-ci.org/mafintosh/numeric-id-map)

Usage

` js
var map = require('numeric-id-map')
var ids = map()

// map an entry to a numeric id
var id = ids.add({hello: 'world'})

// remove an id and get the data back
// the id will be reused for another entry
var entry = map.remove(id)
`

API

#### var ids = map()

Create a new instance

#### id = ids.add(entry)

Map an entry to a numberic id.

#### entry = ids.remove(id)

Remove an id and return the previously mapped entry.
After removing the id might be reused in the future.

#### entry = ids.get(id)`

Lookup a mapped entry by it's id without removing it

License

MIT