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, and keys can preserve their type.

Install

npm install bidirectional-map

Usage

    import BiMap from '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
object: Object	Creates a structure with the key/values 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 true if it exists a pair with the provided key, false otherwise
hasValue	value: any	boolean	Returns 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
getObject		Object	Parses the internal "one direction" map to a plain {}. Throws exception if the map has non-primitive key types
getObjectReverse		Object	Parses the internal "one direction" reverse map to a plain {}. Throws exception if the reverse map has non-primitive key types

Changelog

• 1.1.0
  • Add getObject() and getObjectReverse() methods
• 1.0.0
  • Initial release 🎉

License

ISC License