如何将对象数组和嵌套数组反汇编为具有单个数据的独立数组

Question

我有一个这样的对象数组：

[
  {
    alert_count: 3
    alert_level: {value: 0, label: "ignore"}
    count_dates: (3) ["2021-04-21T14:36:02.446Z", "2021-04-21T14:36:12.039Z", "2021-04-21T14:37:04.495Z"]
    sound_type: {_id: "606331d3b0e1706ec7e55598", sound_type: "Finger snapping"}
    sensor: {     
      sound_files: (3) ["60803852d78352ad8784220b", "6080385bd78352e29d84220d", 60803890d7835296b684221a"] 
   }
]

我需要通过'count_dates:‘和'sound_files:’拆卸对象，并创建3个对象，每个对象都有一个日期和声音文件。如下所示：

[
 {
    alert_count: 1
    alert_level: {value: 0, label: "ignore"}
    count_dates: (1) ["2021-04-21T14:36:02.446Z"]
    sound_type: {_id: "606331d3b0e1706ec7e55598", sound_type: "Finger snapping"}
    sensor: {     
      sound_files: (1) ["60803852d78352ad8784220b"] 
   },
{
    alert_count: 1
    alert_level: {value: 0, label: "ignore"}
    count_dates: (1) [ "2021-04-21T14:36:12.039Z"]
    sound_type: {_id: "606331d3b0e1706ec7e55598", sound_type: "Finger snapping"}
    sensor: {     
      sound_files: (1) [ "6080385bd78352e29d84220d"] 
   },
{
    alert_count: 1
    alert_level: {value: 0, label: "ignore"}
    count_dates: (1) [ "2021-04-21T14:37:04.495Z"]
    sound_type: {_id: "606331d3b0e1706ec7e55598", sound_type: "Finger snapping"}
    sensor: {     
      sound_files: (1) [60803890d7835296b684221a"] 
   }
];

我试着使用循环，过滤，map +过滤器。

示例：

const result = alert.filter(({ count_dates }) => count_dates.some( ({ alert }) => dateToString(alert) === dateToString(date - 1) ) );

在这里，我试图只获取昨天的警报，但它给了我所有在数组中有日期的警报，它不会将数组停止或拆分为单个数组。我也尝试做嵌套的forEach FN，不起作用

我得到的最接近的是不含其他数据的所有日期的数组。

我希望有人能帮助我:-)

Answer 1

你可以尝试像这样的东西

var a =[
{
  alert_count: 3,
  alert_level: {value: 0, label: "ignore"},
  count_dates: ["2021-04-21T14:36:02.446Z", "2021-04-21T14:36:12.039Z", "2021-04-21T14:37:04.495Z"],
  sound_type: {_id: "606331d3b0e1706ec7e55598", sound_type: "Finger snapping"},
sensor: {     
  sound_files: ["60803852d78352ad8784220b", "6080385bd78352e29d84220d", "60803890d7835296b684221a"] 
}}];

console.log(a);

var mapped = a.map(function(item){
  var ret = []; 
  for(var i=0;i<item.alert_count;i++){
     ret.push({
            alert_count: 1,
            alert_level: item.alert_level,
            count_dates: item.count_dates[i],
            sound_type: item.sound_type,
            sound_file: item.sensor.sound_files[i]
     });
   
  }
  return ret;
})

console.log(mapped);