验证数组内属性对象的值

var array = [
  { name: 'John', age: 25 },
  { name: 'Jane', age: 30 },
  { name: 'Bob', age: 35 }
];

for (var i = 0; i < array.length; i++) {
  var obj = array[i];
  
  if (obj.hasOwnProperty('name')) {
    if (obj.name === 'John') {
      console.log('Name is John');
    } else {
      console.log('Name is not John');
    }
  } else {
    console.log('Object does not have name property');
  }
  
  if (obj.hasOwnProperty('age')) {
    if (obj.age > 30) {
      console.log('Age is greater than 30');
    } else {
      console.log('Age is not greater than 30');
    }
  } else {
    console.log('Object does not have age property');
  }
}