'use strict';

const cityPopulation = new Map();

cityPopulation.set('Shanghai', 24256800);

cityPopulation.set('Beijing', 21516000);

cityPopulation.set('Delhi', 16787941);

cityPopulation.set('Lagos', 16060303);

console.log('\nKeys');

console.log(cityPopulation.keys());

const keys = [...cityPopulation.keys()];

console.log(keys);

console.log('\nValues');

console.log(cityPopulation.values());

console.log('\nEntries');

console.log(cityPopulation.entries());

cityPopulation.delete('Shanghai');

console.log('\nEntries after delete(\'Shanghai\')');

console.log(cityPopulation.entries());

cityPopulation.clear();

console.log('\nEntries after clear');

console.log(cityPopulation.entries());