map ↔ iterable Object key:value pair struct with arbitrary key Type

Source: exploringjs.com/impatient

map is technically ordered ONLY in JS - since insertion order is preserved - but same doesn't apply in other languages!

Map()

Constructor to Instantiate new map Object

Methods to Create new map

References

1. Map() ↔ Constructor to Instantiate new map Object

2. Associative Array ↔ map or Dictionary collection of key/value pairs, with unique keys