将json对象转换为数组，使用Javascript迭代ng-repeat

Convert json object in to array to iterate through ng-repeat using Javascript?

本文关键字：使用 Javascript 迭代 ng-repeat 数组 json 对象 转换      更新时间：2023-09-26

这是我的示例json，我从firebase获得json obj，我必须将列表转换为数组，以便通过ng-repeat在html中绑定。

我的Json对象是

  {
  "cats1": {
    "Name": "cricket",
    "imgUrl": "some url",
    "list1": {
      "bat": {
        "Name": "bat",
        "imgUrl": "some url",
        "price": "$100"
      },
      "pads": {
        "displayName": "pads",
        "imgUrl": "some url",
        "price": "$50"
      }
    }
  },
  "cats2": {
    "Name": "football",
    "imgUrl": "some url"
  }
}

这是我需要的

这是我需要的数组结构，当我添加新列表时，它必须唯一地存储在板球类别中。

[
  {
    "Name": "cricket",
    "imgUrl": "some url",
    "list1": [
      {
        "Name": "bat",
        "imgUrl": "some url",
        "price": "$100"
      },
      {
        "displayName": "pads",
        "imgUrl": "some url",
        "price": "$50"
      }
    ]
  },
  {
    "Name": "football",
    "imgUrl": "some url"
  }
]

我是一个新手，请帮助我解决这个问题

使用Object.keys并将它们传递给Array.prototype.map以创建您想要的数组-参见下面的演示:

var object={cats1:{Name:"cricket",imgUrl:"some url",list1:{bat:{Name:"bat",imgUrl:"some url",price:"$100"},pads:{displayName:"pads",imgUrl:"some url",price:"$50"}}},cats2:{Name:"football",imgUrl:"some url"}};
var result = Object.keys(object).map(e=>object[e]);
console.log(result);
.as-console-wrapper{top:0;max-height:100%!important;}

编辑:

修正解使list1成为数组:

var object={cats1:{Name:"cricket",imgUrl:"some url",list1:{bat:{Name:"bat",imgUrl:"some url",price:"$100"},pads:{displayName:"pads",imgUrl:"some url",price:"$50"}}},cats2:{Name:"football",imgUrl:"some url"}};
var result = Object.keys(object).map(function(e){
  Object.keys(object[e]).forEach(function(k){
     if(typeof object[e][k] == "object") {
       object[e][k] = Object.keys(object[e][k]).map(function(l){
         return object[e][k][l];
       });
     }
  });
  return object[e];
});
console.log(result);
.as-console-wrapper{top:0;max-height:100%!important;}

您可以递归，但要注意这可能会导致大对象冻结，也可能导致Maximum Call Stack exceeded

逻辑
  • 遍历对象并检查是否所有条目都是对象。
  • 如果是，那么简单的Object.keys(obj).map(x=>obj[x])就可以了。
  • 如果没有，那么你将不得不复制单个值和If对象，然后再次循环内部对象。一个简单的方法是循环每个键，如果类型不是对象，只返回值。

function ObjectToArray(obj) {
  if (typeof(obj) === 'object') {
    var keys = Object.keys(obj);
    var allObjects = keys.every(x => typeof(obj[x]) === 'object');
    if (allObjects) {
      return keys.map(x => ObjectToArray(obj[x]));
    } else {
      var o = {};
      keys.forEach(x => {
        o[x] = ObjectToArray(obj[x])
      });
      return o;
    }
  } else {
    return obj;
  }
}
var d={cats1:{Name:"cricket",imgUrl:"some url",list1:{bat:{Name:"bat",imgUrl:"some url",price:"$100"},pads:{displayName:"pads",imgUrl:"some url",price:"$50"}}},cats2:{Name:"football",imgUrl:"some url"}};
console.log(ObjectToArray(d))

您可以这样做，通过迭代输入对象键并剥离键。

var app = angular.module("sampleApp", []);
app.controller("sampleController", ["$scope",
  function($scope) {
    $scope.result = {
      "cats1": {
        "Name": "cricket",
        "imgUrl": "some url",
        "list1": {
          "bat": {
            "Name": "bat",
            "imgUrl": "some url",
            "price": "$100"
          },
          "pads": {
            "displayName": "pads",
            "imgUrl": "some url",
            "price": "$50"
          }
        }
      },
      "cats2": {
        "Name": "football",
        "imgUrl": "some url"
      }
    };
    $scope.format = Object.keys($scope.result).map((key) => $scope.result[key])
  }
]);
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.8/angular.min.js"></script>
<div ng-app="sampleApp">
  <div ng-controller="sampleController">
    <div>Formatted</div>
    <pre>{{format | json}}</pre>
  </div>
</div>

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