@allenfuture/lotide/findKey.js

Support [flatten] test

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

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

// 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;