@supercharge/map NPM

Introduction

The @supercharge/map package provides an extended JavaScript Map class. It comes with additional methods like .isEmpty() or .map(callback).

You already know methods like .map() from arrays and having them available on maps improves your development experience and makes your code more readable.

Installation

npm i @supercharge/map

Docs

Find all the details for @supercharge/map in the extensive Supercharge docs.

Usage

Using @supercharge/map is pretty straightforward. Import the Map class exported from the @supercharge/map package and use it (almost) the same way you would use JavaScript’s Map class. This package gives you the parameter order key, value, map in callbacks. JavaScript’s Map class gives you value, key, map:

const Map = require('@supercharge/map')

const cache = new Map()

cache.isEmpty()
// true

cache
  .set('user:1', 'Marcus')
  .set('user:2', 'Supercharge')

cache.isNotEmpty()
// true

const users = cache.map((key, value, map) => {
  return { [key]: value }
})

// [{ 'user:1': 'Marcus' }, { 'user:2': 'Supercharge' }]