javascript - 从由 Array 组成的对象中获取值

Question

我有一个只包含一个 Array(17) 的对象。我想从此数组中获取特定值，例如 index = 4 -> 1523181939。

我怎样才能得到它？

我通过运行得到一个控制台结果:

this.temp = this.flights['states'];
console.log(this.temp);
console.log(typeof this.temp);

我的对象 this.flights 的形式是

{time: 1523183848, states: Array(1)}
states: [Array(17)]
time: 1523183848 
__proto__: Object

当我调用 this.flights['states'] 时，我得到:

[Array(17)]

最后，在调用 this.flights['states'][0][4] 时出现错误:

ERROR TypeError: Cannot read property '0' of undefined

开始我从 Opensky-Network Api 获取的航类对象:

{
    "time": 1523183840,
    "states": [
        [
            "89906e",
            "EVA857  ",
            "Taiwan",
            1523183838,
            1523183839,
            121.2966,
            25.1178,
            716.28,
            false,
            111.38,
            50.06,
            8.78,
            null,
            746.76,
            null,
            false,
            0
        ]
    ]
}

Answer 1

工作代码如下。

像这样访问对象上的数组元素 this.temp = this.flights.states[0][4];

像下面那样做:

var flights = {"time":1523183840,"states":[["89906e","EVA857  ","Taiwan",1523183838,1523183839,121.2966,25.1178,716.28,false,111.38,50.06,8.78,null,746.76,null,false,0]]};



this.temp = this.flights.states[0][4];
console.log(this.temp);
console.log(typeof this.temp);

立即查看。根据您的要求，它现在是工作代码。