map-better

Map with better functions

Install

npm i map-better

Usage

const Map = require('map-better')

API

• .getKey(value) Returns the key of the specified element
• .hasValue(value) Returns a boolean indicating whether the element (at any key) exists or not
• .setKey(value, key) Updates the key of the specified element (or throws an error if element doesn't exist)
• .map((value, key) => newValue) Creates a new Map with same keys but with values from the result of the callback
• .mapKeys((key, value) => newKey)    〃   a new Map with same values but with keys from the result of the callback
• .mapArray((value, key) => newValue) Creates a new array with the results of the callback
• .filter((value, key) => true|false) Creates a (new) filtered Map (with the same keys)
• .find((value) => true|false) Returns first element (value) that satisfies the testing function
• .reverse(inPlace = false) Reverses the (iterator of the) Map
• .invert(inPlace = false) Inverts keys <==> values of the Map
• .entriesArray() Returns Array.from(this.entries())
• .valuesArray() Returns Array.from(this.values())
• .keysArray() Returns Array.from(this.keys())
• .length Returns this.size
• Map.from(array, (key) => value) Create a new Map using keys from an array and values from the callback