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Example 1: anoymous function

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) {
    return e.population > 3000000;
});
console.log(bigCities);

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