2727. Is Object Empty

In this page, we will discuss LeetCode Problem 2727: Is Object Empty. The goal is to determine whether a given object has any properties or not.

📄 Problem Statement

Write a function isEmpty that takes an object or array and returns true if it has no key-value pairs or elements. Otherwise, return false.

💡 Example

Input: obj = {}
Output: true

Input: obj = {x: 5, y: 42}
Output: false

🧠 Explanation

The problem checks if an object has any properties or if an array has any elements. You can use Object.keys(obj).length to get the number of keys in the object. If the length is 0, then it's empty.

Works for both arrays and objects since arrays are objects in JavaScript.

✅ Your Solution


var isEmpty = function(obj) {
    return Object.keys(obj).length === 0;
};