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}}
]

我试过了：

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)]}}
);                                                                                                                                  
 }

但没有工作！

如何将数据推送到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

解决方案如下： -

$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

你根本不远，你要找的是计算属性（或者只是在创建对象后设置属性名称）。您可以使用属性初始值设定项中[expression]左侧的:来执行计算属性名称。

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，自ES2015起，计算属性名称为new（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;

但是如果你不想使用map，这里的版本对你现有代码的改动很小：

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;
}

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

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);

那就是说，你可能想重温一下你的结构。显然，如果不了解更多（这将超出原始问题的范围）是不可能确定的，但这种结构看起来可能比它可能更复杂。

如何将json推入数组？

3 个答案: