javascript extract sub array by property in array of objects code example

Example: javascript subset of object array matching certain property

let cities = [
    {name: 'Los Angeles', population: 3792621},
    {name: 'New York', population: 8175133},
    {name: 'Chicago', population: 2695598},
    {name: 'Houston', population: 2099451},
    {name: 'Philadelphia', population: 1526006}
];

let bigCities = cities.filter(function (e) {  // filter function
    return e.population > 3000000;
});

//Output:
[
  { name: 'Los Angeles', population: 3792621 },
  { name: 'New York', population: 8175133 }
]