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Think of a Map as a super-powered dictionary where you can use ANY type as a key - not just strings! Objects, arrays, numbers, even other Maps can be keys. It remembers the order you added items and has built-in methods for everything.
Use objects, arrays, functions - anything as keys! Not limited to strings.
Remembers the order items were added - objects don't guarantee this!
Get the count instantly with .size property!
set(key, value)Add or update key-value pair
get(key)Get value by key
has(key)Check if key exists
delete(key)Remove a key-value pair
sizeGet number of entries
clear()Remove all entries
The superpower of Map - any type can be a key!
Add, update, check, and remove entries
Use objects, arrays, functions - anything as keys!
Remembers insertion order - guaranteed iteration order
Faster for frequent additions and deletions than objects
Built-in methods: set, get, has, delete, clear