JAVASCRIPT

map and set in javascript

map.keys() // The keys() method returns the keys

map and set in javascript

map.values() // The values() method returns the values:

map and set in javascript

const map = new Map([
  [1970, 'bell bottoms'],
  [1980, 'leg warmers'],
  [1990, 'flannel'],
])

map and set in javascript

// Map
Map.prototype.forEach((value, key, map) = () => {}

// Array
Array.prototype.forEach((item, index, array) = () => {}