CacheMap is an Es6's Map-like collection class with a limit of number of items. The limit must be specified at initialization time. ## Install ```sh npm install --save @hscmap/cache-map ```
npm install @hscmap/cache-mapsh
npm install --save @hscmap/cache-map
`Example
typescript
import { CacheMap } from "@hscmap/cache-map"
import * as _ from 'lodash'
const assert = (test: boolean) => console.assert(test)
!(function withoutPersistentItem() {
const dropLog: number[] = []
const cm = new CacheMap(3, v => dropLog.push(v))
cm.set('one', 1)
cm.set('two', 2)
cm.set('three', 3)
assert(cm.get('one') == 1)
assert(cm.get('two') == 2)
assert(cm.get('three') == 3)
cm.set('four', 4)
assert(cm.get('four') == 4)
assert(cm.get('one') == undefined)
assert(cm.get('two') == 2)
cm.set('five', 5)
assert(cm.peek('two') == 2)
assert(cm.peek('three') == undefined)
assert(cm.size == 3)
assert(_.isEqual(dropLog, [1, 3]))
cm.clear()
assert(cm.size == 0)
assert(_.isEqual(dropLog, [1, 3, 4, 2, 5]))
cm.set('one', 1)
cm.set('two', 2)
cm.delete('one')
assert(cm.get('one') == undefined)
assert(cm.size == 1)
})()
!(function test2() {
const dropLog: number[] = []
const cm = new CacheMap(3, v => dropLog.push(v))
cm.set('one', 1, true)
cm.set('two', 2)
cm.set('three', 3, true)
cm.set('four', 4)
cm.set('five', 5)
cm.set('six', 6)
cm.set('seven', 7)
assert(cm.peek('one') == 1)
assert(cm.peek('two') == undefined)
assert(cm.peek('three') == 3)
assert(cm.peek('four') == undefined)
assert(cm.size == 5)
assert(_.isEqual(dropLog, [2, 4]))
})()
``