Javascript 数组中的对象，如何访问它们？

如何访问阵列中的对象。我需要访问firstName值（'n1'…'n4'）和hasSmartphone值（true或false）？谢谢。

（var i=0；i访问示例

第一个
firstName
：

for (var i=0;i<people.length;i++) {
  var person = people[i];
  var firstName=person.firstname;
  var sm = person.hasSmartphone;
  ...
}

for (var i=0;i<people.length;i++) {
  var person = people[i];
  var firstName=person.firstname;
  var sm = person.hasSmartphone;
  ...
}

people[0].firstName < the firstName property of this first object
      ^^
  first object
  in your array

people[2].hasSmartphone < the hasSmartphone property of this third object
      ^^
  third object
  in your array