Not getting all the keys of nested object using Javascript

May 17, 2022

I am trying to fetch all the keys of one nested object using Javascript but as per my code its not working as expected. I am explaining my code below.

let jsonObj = {
    "service":[
        {
            "name":"restservice",
            "device":"xr-1",
            "interface-port":"0/0/2/3",
            "interface-description":"uBot testing for NSO REST",
            "addr":"10.10.1.3/24",
            "mtu":1024
        }
    ],
    "person": {
    "male": {
      "name": "infinitbility"
    },
    "female": {
      "name": "aguidehub"
    }
  }
}

const getNestedKeys = (data, keys) => {
  if(!(data instanceof Array) && typeof data == 'object'){
    Object.keys(data).forEach(key => {
      keys.push(key);
      const value = data[key];
      if(typeof value === 'object' && !(value instanceof Array)){
         getNestedKeys(value, keys);
      }
   });
  }
  return keys
}
let result = getNestedKeys(jsonObj, []);

console.log('result', result);

Here I am not getting the keys present inside the service array. I need to search all the keys present inside one nested object using Javascript.

>Solution :

you can do this

const readAllKeys = obj => {
  if(typeof obj !== 'object'){
    return []
  }
  if(Array.isArray(obj)){
    return obj.flatMap(readAllKeys)
  }
  
  return [...Object.keys(obj), ...Object.values(obj).flatMap(readAllKeys)]
}


let jsonObj = {
    "service":[
        {
            "name":"restservice",
            "device":"xr-1",
            "interface-port":"0/0/2/3",
            "interface-description":"uBot testing for NSO REST",
            "addr":"10.10.1.3/24",
            "mtu":1024
        }
    ],
    "person": {
    "male": {
      "name": "infinitbility"
    },
    "female": {
      "name": "aguidehub"
    }
  }
}

console.log(readAllKeys(jsonObj))