javascript - How to search for a value in Object which contains sub objects with as array values

Question

I have json object and i want to search for a key in it and return that Object key as a result if the key matches. consider the following example

obj = {
    "India": {
        "Karnataka": ["Bangalore", "Mysore"],
        "Maharashtra": ["Mumbai", "Pune"]
    },
    "USA": {
        "Texas": ["Dallas", "Houston"],
        "IL": ["Chicago", "Aurora", "Pune"]

    }
}

input: Pune
output: ['Maharashtra','IL']

Answer 1

You can try this-

const obj = {
  "India" : {
    "Karnataka" : ["Bangalore", "Mysore"],
    "Maharashtra" : ["Mumbai", "Pune"]
  },
  "USA" : {
    "Texas" : ["Dallas", "Houston"],
    "IL" : ["Chicago", "Aurora", "Pune"]
  }
};


const search = (obj, keyword) => {
  return Object.values(obj).reduce((acc, curr) => {
      Object.entries(curr).forEach(([key, value]) => {
        if (value.indexOf(keyword) > -1) {
          acc.push(key);
        }
      });
    return acc;
  }, []);
}

console.log(search(obj, 'Pune'));