ts-defaultmap

Map, now with defaults!

Installation

ts-defaultmap is available from [NPM][npm].

npm i ts-defaultmap

It is available as CommonJS and ESM, with Typescript types.

Usage

Import DefaultMap and use as below:

import { DefaultMap } from 'ts-defaultmap'

const map = new DefaultMap<string, string>(() => "myDefault")
map.has('missing')  // false
map.get('missing')  // 'myDefault'
map.set('missing', 'myVal')
map.get('missing')  // 'myVal'

// optionally initialised with entries, just likeMap
const filledMap = new DefaultMap<string, number>(() => 42, [['unity', 1], ['magic', 3]])
map.get('unity')  // 1
map.get('meaning-of-life-the-universe-and-everything')  // you get it...

See examples for more usage.