MAPS

Map, Map, Map, Map

Think super objects

Use the syntax

new Map([
['key', 'value']

])

to update a map you can use the set method

const myMap, = new Map([
['key', 'value']

])

myMap.set('key', 'value')

to see all of your key-value pairs,

myMap.forEach(value, key) => {console.log(key, value);
});

WeakMap is useful for if you want to use an object as a key.