Question

如何对对象数组进行排序，该对象数组又包含对象数组，我想按其上一个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'
    }]
  }
]

作为回报，我希望像这样的已排序对象

 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

这可能有效。它按city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);

Answer 2

使用数组的 sort 方法：

weather.sort(function(obj1, obj2){
   return obj1.response.lastTimestamp < obj2.response.lastTimestamp ? 1 : -1;
});

Answer 3

对您自己的函数使用排序。它应该看起来像这样：

weather.sort( (a,b) => {
    return new Date(b.response.lastTimestamp) - new Date(a.response.lastTimestamp)
});

如何对对象数组进行排序以再次保存对象数组

3 个答案: