'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());