Multiple values with `for ... of`

map-entries.js

// Dummy data
var myMap = new Map();
myMap.set("0", "foo");
myMap.set(1, "bar");
myMap.set({}, "baz");

// entries() returns an array of arrays
for (const entry of myMap.entries(myMap))
  console.log(entry)
// Console output:
// ["0","foo"]
// [1,"bar"]
// [{},"baz"]

// Protip: Destructure each `entry` array into its components
for (const [key, val] of myMap.entries(myMap))
  console.log(key, val)
// Console output:
// 0 foo
// 1 bar
// {} baz