数组中的对象，我如何访问它们？

Question

    var people = [
  { firstname : 'n1', lastname: 'ln1', age: 32, hasSmartphone: false }, 
  { firstname : 'n2', lastname: 'ln2', age: 40, hasSmartphone: true },
  { firstname : 'n3', lastname: 'ln3', age: 81, hasSmartphone: true },
  { firstname : 'n4', lastname: 'ln4', age: 40, hasSmartphone: false } 
                 ];

我怎样才能访问数组中的对象。我需要访问 firstName 值 ('n1' ... 'n4') 和 hasSmartphone 值（true 或 false）？谢谢

Answer 1

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

Answer 2

访问示例。

第一个firstName:

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

或第三个对象的hasSmartphone：

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

数组中的对象，我如何访问它们？

Objects in Array, how can i access to them?

javascript

arrays

object