code added

Author: Bharat2044

20_isObjectEmpty.js

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+// Question Link: https://leetcode.com/problems/is-object-empty/description/?envType=study-plan-v2&envId=30-days-of-javascript
+// Solution Link: https://leetcode.com/problems/is-object-empty/solutions/5446306/2-easy-one-line-javascript-solution-using-loops-and-predefined-function/
+
+/*
+2727. Is Object Empty
+
+Given an object or an array, return if it is empty.
+An empty object contains no key-value pairs.
+An empty array contains no elements.
+You may assume the object or array is the output of JSON.parse.
+
+Example 1:
+Input: obj = {"x": 5, "y": 42}
+Output: false
+Explanation: The object has 2 key-value pairs so it is not empty.
+
+Example 2:
+Input: obj = {}
+Output: true
+Explanation: The object doesn't have any key-value pairs so it is empty.
+
+Example 3:
+Input: obj = [null, false, 0]
+Output: false
+Explanation: The array has 3 elements so it is not empty.
+ 
+Constraints:
+obj is a valid JSON object or array
+2 <= JSON.stringify(obj).length <= 10^5 
+
+Can you solve it in O(1) time?
+*/
+
+
+
+/**
+ * @param {Object|Array} obj
+ * @return {boolean}
+ */
+
+// 1st Approach
+var isEmpty = function(obj) {
+    for (const _ in obj) {
+        return false;
+    }
+
+    return true;
+};
+
+/*
+// 2nd Approach
+var isEmpty = function(obj) {
+    let result = Object.keys(obj).length === 0;
+
+    return result;
+};
+*/