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

var names = [];
for (var i = 0; i < array.length; i++) {
  names.push(array[i].name);
}

console.log(names); // 输出：['John', 'Jane', 'Bob']

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

var names = array.map(function(obj) {
  return obj.name;
});

console.log(names); // 输出：['John', 'Jane', 'Bob']

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

var names = array.reduce(function(acc, obj) {
  acc.push(obj.name);
  return acc;
}, []);

console.log(names); // 输出：['John', 'Jane', 'Bob']