capped_map

Install

npm install --save capped_map

Use

Provide a maximum size to the constructor. When the map reaches that size, adding a new entry will cause the oldest entry to be deleted.

const makeCappedMap = require('capped_map')
const assert = require('assert')

let map = makeCappedMap(new Map(), 1)

map.set(1, 1)
assert.strictEqual(map.get(1), 1)

map.set(2, 2)
assert.strictEqual(map.size, 1)
assert.strictEqual(map.has(1), false)
assert.strictEqual(map.get(2), 2)