JavaScript map

var companies = [

  {name: "Google", category: "Technology"},

  {name: "Tesla", category: "Auto"},

  {name: "AirBnb", category: "Retail"}

];

var companyNames = companies.map(function(item) {

	return item.name;

});

console.log(companyNames); // ["Google", "Tesla", "AirBnb"]

Alternative syntax with arrow function:

var companies = [

  {name: "Google", category: "Technology"},

  {name: "Tesla", category: "Auto"},

  {name: "AirBnb", category: "Retail"}

];

var companyNames = companies.map(item => item.name);

console.log(companyNames); // ["Google", "Tesla", "AirBnb"]