findKey.js

const assertEqual = function(actual, expected) {

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


/* 
INSTRUCTIONS:
Implement the function findKey which takes in an object 
and a callback. It should scan the object and return the 
first key for which the callback returns a truthy value. 
If no key is found, then it should return undefined.
*/

const findKey = function (object, callback) {
  //scan the object 

  // console.log(callback((object)))

  for (let parts in object) {
    //if the key returns a truthy value, return the key
    if (callback(object[parts])) {
      // console.log(parts)
      // console.log((object[parts]));
      return true;
    } 
  }
  //if there is no match return undefined
  return undefined;
}

module.exports = findKey;

// 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), true) // => "noma"