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findKey.js
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findKey.js
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const assertEqual = function(actual, expected) {
if (actual === expected) {
console.log(`✅✅ Assertion Passed: ${actual} === ${expected}`);
} else {
console.log(`🔴🔴 Assertion Failed: ${actual} !== ${expected}`);
}
};
const findKey = function(obj, callback) {
let result;
const keys = Object.keys(obj);
for (let key of keys) {
if (callback(obj[key])) {
result = key;
break;
}
}
return result;
};
module.exports = findKey;
// Test cases
const results = findKey({
"Blue Hill": { stars: 1 },
"Akaleri": { stars: 3 },
"noma": { stars: 2 },
"elBulli": { stars: 3 },
"Ora": { stars: 2 },
"Akelarre": { stars: 3 }
}, x => x.stars === 2);
let results1 = findKey({
a: 10,
b: 20,
c: 11,
d: 25,
e: 22
}, x => x % 2 !== 0);
assertEqual(results,"noma");
assertEqual(results1,'c');