findKeys.js

const assertEqual = function (actual, expected) {
  if (actual === expected) {
    console.log(`✅✅✅ Assertion Passed: ${actual} === ${expected}`);
  } else {
    console.log(`🛑🛑🛑 Assertion Failed: ${actual} !== ${expected}`);
  }
  return;
};


const findKey = function (obj, cb) {
  for (let key in obj)
    if (cb(obj[key])) {
      return key
    }
    
};


assertEqual(findKey({
  "Blue Hill": { stars: 1 },
  "Akaleri": { stars: 3 },
  "noma": { stars: 2 },
  "elBulli": { stars: 3 },
  "Ora": { stars: 2 },
  "Akelarre": { stars: 3 }
}, x => x.stars === 2), "noma");

module.exports = findKey;