Cleans JSON objects by removing undesired properties and promoting nested objects (set parent = child) recursively.

cleanObject.js

/*
@function cleanObject - Cleans javascript objects recursively (removes and promotes [parent = child] properties)
@param {Object} obj - Object to be clean
@param {Array} toRemove - array composed by the property names to be removed
@param {Array} toPromote - array composed by the property names to be promoted to the parent's value
*/
function cleanObject(dirtyObj, toRemove, toPromote) {
  var obj = JSON.parse(JSON.stringify(dirtyObj));
  var itemsObj;
  var o;
  for (o in obj) {
    if (toRemove.indexOf(o) !== -1) {
      delete obj[o];
    } else {
      if (toPromote.indexOf(o) !== -1) {
        itemsObj = obj[o];
        obj[o] = cleanObject(obj[o], toRemove, toPromote);
      } else if (typeof obj[o] === 'object') {
        obj[o] = cleanObject(obj[o], toRemove, toPromote);
      }
    }
  }
 
  return itemsObj || obj;
}
 
 
function testCleanObject() {
  var dirtyObject = {
    "child": {
      "listAllSelectedIndices": [],
      "items": [
        {
          "fakeToken": "1"
        },
        {
          "fakeToken": "2"
        }
      ]
    }
  };
  var cleanedObject = {
    "child": [
      {
        "fakeToken": "1"
      },
      {
        "fakeToken": "2"
      }
    ]
  };
 
  var outputObject = cleanObject(dirtyObject, ['listAllSelectedIndices'], ['items']);
 
  // console.log(cleanedObject);
  console.log(outputObject);
  assert(JSON.stringify(outputObject) === JSON.stringify(cleanedObject), "");
 
}