const map1 = new Map();
map1.set('a', 1);
map1.set('b', 2);
map1.set('c', 3);
console.log(map1.get('a'));
// expected output: 1
map1.set('a', 97);
console.log(map1.get('a'));
// expected output: 97
console.log(map1.size);
// expected output: 3
map1.delete('b');
console.log(map1.size);
// expected output: 2