如何将json推入数组？

Question

我有一个数组

$scope.headArray=[
  'Online & Open Alarms',
  'Sites Overview',
  'Active Alarms',
  'Hidden Alarms'
];

我有一个对象：

$scope.dashboardstatus = {
  hideDashboard1:true,  closeDashboard1:false,
  hideDashboard2:true,  closeDashboard2:true,
  hideDashboard3:false, closeDashboard3:false,
  hideDashboard4:false, closeDashboard4:false
}

我想创建这个表：

$scope.dashArray = [
 {Online & Open Alarms:{hideDashboard1:true,closeDashboard1:false}} ,
 {Sites Overview:      {hideDashboard2:true,closeDashboard2:true}},
  Actives Alarms:      {hideDashboard3:false,hideDashboard3:false},
 {Hidden Alarms:       {hideDashboard4:false,closeDashboard4}}
]

我试过这个：

for (var i=0; i< $scope.headingArray.length; i++){         
    $scope.dashArray.push({$scope.headingArray[i],
   {$scope.dashboardstatus['closeDashboard'(i+1)],$scope.dashboardstatus['hideDashboard'+(i+1)]}}
);                                                                                                                                  
 }  

但不行！

如何将数据推入dashArray？

Answer 1

您可以执行以下操作以获得最终结果：

let headArray=['Online & Open Alarms','Sites Overview','Active Alarms','Hidden Alarms'];
let dashboardstatus = {hideDashboard1:true,closeDashboard1:false,hideDashboard2:true,closeDashboard2:true,hideDashboard3:false,closeDashboard3:false,hideDashboard4:false,closeDashboard4:false}


let result = headArray.map((element, index) => { 
  let hideKey = `hideDashboard${index+1}`;
  let closeKey = `closeDashboard${index+1}`;
  return {[element]: {
    [hideKey]:dashboardstatus[hideKey],
    [closeKey]:dashboardstatus[closeKey]
  }}
})

console.log(result);

Answer 2

解决方法如下：-

$scope.headArray = ['Online & Open Alarms', 'Sites Overview', 'Active Alarms', 'Hidden Alarms'];

$scope.dashboardstatus = {
  hideDashboard1: true,
  closeDashboard1: false,
  hideDashboard2: true,
  closeDashboard2: true,
  hideDashboard3: false,
  closeDashboard3: false,
  hideDashboard4: false,
  closeDashboard4: false
}
$scope.dashArray = [];

for (var i = 0; i < $scope.headArray.length; i++) {
  //form the child object first
  var objFirstChild = "hideDashboard" + (i + 1);
  var objSecondChild = "closeDashboard" + (i + 1);
  var childObj = {};
  childObj["hideDashboard" + (i + 1)] = $scope.dashboardstatus[objFirstChild];
  childObj["closeDashboard" + (i + 1)] = $scope.dashboardstatus[objSecondChild];
  //form the parent object and push it into array
  var parentObj = {}
  parentObj[$scope.headArray[i]] = childObj;
  $scope.dashArray.push(parentObj);
}


console.log($scope.dashArray);

简单 JavaScript 中的简化方式，如下：-

var headArray = ['Online & Open Alarms', 'Sites Overview', 'Active Alarms', 'Hidden Alarms'];

var dashboardstatus = {
  hideDashboard1: true,
  closeDashboard1: false,
  hideDashboard2: true,
  closeDashboard2: true,
  hideDashboard3: false,
  closeDashboard3: false,
  hideDashboard4: false,
  closeDashboard4: false
}
var dashArray = [];

for (var i = 0; i < headArray.length; i++) {
  var objFirstChild = "hideDashboard" + (i + 1);
  var objSecondChild = "closeDashboard" + (i + 1);
  var childObj = {};
  childObj["hideDashboard" + (i + 1)] = dashboardstatus[objFirstChild];
  childObj["closeDashboard" + (i + 1)] = dashboardstatus[objSecondChild];
  var parentObj = {}
  parentObj[headArray[i]] = childObj;
  dashArray.push(parentObj);
}


console.log(dashArray);

Answer 3

您并不遥远，您正在寻找的是计算属性（或者只是在创建对象后设置属性名称）。您可以在属性初始化程序中使用 : 左侧的 [expression] 来计算属性名称。

我会使用map：

const headArray=['Online & Open Alarms','Sites Overview','Active Alarms','Hidden Alarms'];

const dashboardstatus = {hideDashboard1:true,closeDashboard1:false,hideDashboard2:true,closeDashboard2:true,hideDashboard3:false,closeDashboard3:false,hideDashboard4:false,closeDashboard4:false}

const dashArray = headArray.map((name, index) => {
  const hide = "hideDashboard" + (index + 1);
  const close = "closeDashboard" + (index + 1);
  return {
    [name]: {[hide]: dashboardstatus[hide], [close]: dashboardstatus[close]}
  };
});

console.log(dashArray);

.as-console-wrapper {
  max-height: 100% !important;
}

请注意，从 ES2015 开始，计算属性名称是新的（ish）。在 ES2015 之前，您必须先创建对象，然后添加属性。 map 回调的主体是：

const hide = "hideDashboard" + (index + 1);
const close = "closeDashboard" + (index + 1);
const obj = {};
const value = {};
value[close] = dashboardstatus[close];
value[hide] = dashboardstatus[hide];
obj[name] = value;
return obj;

但如果您不想使用map，这里有一个对您现有代码的改动很小的版本：

const headArray=['Online & Open Alarms','Sites Overview','Active Alarms','Hidden Alarms'];

const dashboardstatus = {hideDashboard1:true,closeDashboard1:false,hideDashboard2:true,closeDashboard2:true,hideDashboard3:false,closeDashboard3:false,hideDashboard4:false,closeDashboard4:false}

const dashArray = [];

// Note that you had $scope.headingArray, not $scope.headArray, but you showed
// $scope.headArray when showing the array's contents
for (var i = 0; i < headArray.length; i++) {
  const close = 'closeDashboard' + (i + 1); // <== Note the + before (i + 1) to do string
  const hide  = 'hideDashboard' + (i + 1);  // concatenation, was missing from one of yours
  dashArray.push({
    [headArray[i]]: // <== computed property name, note : not , after it
    {
      [close]: dashboardstatus[close], // <== Another computed property name
      [hide]:  dashboardstatus[hide]   // <== And another
    }
  });
}

console.log(dashArray);

.as-console-wrapper {
  max-height: 100% !important;
}

同样，在 ES2015 之前，您必须先创建对象，然后添加属性。 for 循环的主体是：

const close = 'closeDashboard' + (i + 1);
const hide  = 'hideDashboard' + (i + 1);
const obj = {};
const value = {};
value[close] = dashboardstatus[close];
value[hide] = dashboardstatus[hide];
obj[headArray[i]] = value;
dashArray.push(obj);

---

也就是说，您可能需要重新审视您的结构。显然，在不了解更多信息的情况下无法确定（这超出了您最初问题的范围），但这种结构看起来可能比实际情况更复杂。