let bigCities = cities.filter(function (e) { return e.population > 3000000; }); console.log(bigCities);
let cities = [ {name: 'Los Angeles', population: 3792621}, {name: 'New York', population: 8175133}, {name: 'Chicago', population: 2695598}, {name: 'Houston', population: 2099451}, {name: 'Philadelphia', population: 1526006} ];