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

Question

Here is my sample json , i am getting my json obj from firebase i have to convert the list in to array to bind in html trough ng-repeat.

my Json object is

  {
  "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"
  }
}

this is how i required

this is the array structure i required , when i add the new list it must store uniquely in cricket category.

[
  {
    "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"
  }
]

i am new to angular any one please help me to figure out this problem

Answer 1

Use Object.keys and pass them on to Array.prototype.map to create the array that you want - see demo below:

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);

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EDIT:

Correcting the solution to make list1 an array:

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);

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Answer 2

You can recursion but do note this can cause freeze for big objects and can also lead to Maximum Call Stack exceeded

Logic

• Loop over object and check if all entries are objects.
• If yes, then a simple Object.keys(obj).map(x=>obj[x]) will do.
• If not, then you will have to copy individual values and if object, then again loop in it for inner objects. A simple way is to loop on every key and if type is not object, just return value.

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))