2727. Is Object Empty
Description
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 array2 <= JSON.stringify(obj).length <= 105
Can you solve it in O(1) time?
Solutions
Solution 1
1 2 3 4 5 6 |
|
1 2 3 4 5 6 7 8 9 10 |
|
Solution 2
1 2 3 |
|