javascript - 如何对再次保存对象数组的对象数组进行排序

Question

如何对再次保存对象数组的对象数组进行排序，并且我想按它们的最后时间戳对其进行排序。

 var weather = [{
    city: 'New York',
    status: 1,
    response: [{
        name: 'Example', lastTimestamp: '2017-12-19T12:43:14.000Z',
        name: 'Example2', lastTimestamp: '2017-12-19T12:42:14.000Z'
    }]
  },
  {
    city: 'Chicago',
    status: 1,
    response: [{
        name: 'Example', lastTimestamp: '2018-05-10T09:00:00.000Z',
        name: 'Example2', lastTimestamp: '2018-05-10T09:04:00.000Z'
    }]
  }
]

作为返回，我想要像这样的排序对象

 var weather = [
  {
    city: 'Chicago',
    status: 1,
    response: [{
        name: 'Example', lastTimestamp: '2018-05-10T09:00:00.000Z',
        name: 'Example2', lastTimestamp: '2018-05-10T09:04:00.000Z'
    }]
  },
  {
    city: 'New York',
    status: 1,
    response: [{
        name: 'Example', lastTimestamp: '2017-12-19T12:43:14.000Z',
        name: 'Example2', lastTimestamp: '2017-12-19T12:42:14.000Z'
    }]
  }
]

Answer 1

这可能有用。它按城市名称排序，如果相等，则按lastTimestamp排序。

var weather = [
    {
        city: 'New York', status: 1, response: {name: 'Example', lastTimestamp: '2017-12-19T12:43:14.000Z'}
    },
    {
        city: 'Chicago', status: 1, response: {name: 'Example', lastTimestamp: '2018-05-10T09:00:00.000Z'}
    },
    {
        city: 'New York', status: 1, response: {name: 'Example', lastTimestamp: '2017-12-20T12:43:14.000Z'}
    },
    {
        city: 'Chicago', status: 1, response: {name: 'Example', lastTimestamp: '2018-05-09T09:00:00.000Z'}
    }
];

weather.sort(function(a,b){
    return a.city>b.city ? 1 :
            a.city<b.city ? -1 : new Date(a.response.lastTimestamp)-new Date(b.response.lastTimestamp)
})

console.log(weather);