var activeSheet = spread.getActiveSheet();

var people = [
    {name: "Albert", isAdult: false, country: "American", website: "albert.com"},
    {name: "Alice", isAdult: true, country: "China", website: "alice.com"},
    {name: "Bob", isAdult: false, country: "Canada", website: "bob.com"}
];

activeSheet.setDataSource(people);