@paar-it-gmbh/bidirectional-map

Bidirectional Map

Create "key/value" collections of one-to-one correspondence. Internally it uses two Map objects, so both keys and values can be of any type.

Install

npm install @paar-it-gmbh/bidirectional-map --save

Usage

import BiMap from '@paar-it-gmbh/bidirectional-map'

// Create an empty map
let map = new BiMap()
map.set('bob', 'alice')
map.get('bob')          // 'alice'
map.getKey('alice')     // 'bob'

// Create a map with some key/values
let map2 = new BiMap([
    ['bob', 'alice'],
    ['john', 'mary']
])
map2.has('bob')          // true
map2.hasValue('mary')    // true
map2.deleteValue('mary')

API

Constructors

Arguments	Description
	Creates an empty structure
array: array	Creates a structure with the elements of object

Properties

Property	Return Type	Description
size	any	Returns the number of key/value pairs

Methods

Method	Arguments	Return Type	Description
set	key: any, value: any		Sets a new key/value pair
get	key: any	any	Returns the value
getKey	value: any	any	Returns the key
clear			Removes all key/value pairs
delete	key: any		Deletes a key/value pair by key
deleteValue	value: any		Deletes a key/value pair by value
entries		MapIterator	Returns a new Iterator object that contains an array of [key, value] for each element in the structure
has	key: any	boolean	Returns a true if it exists a pair with the provided key, false otherwise
hasValue	value: any	boolean	Returns a true if it exists a pair with the provided value, false otherwise
keys		MapIterator	Returns a new Iterator object that contains the keys for each element in the structure
values		MapIterator	Returns a new Iterator object that contains the values for each element in the structure

Changelog

• 3.0.0
• Improved typings, strict mode
• 2.0.0
• Constructor rework, typing
• 1.0.0
• Initial release 🎉

License

ISC License