Given an object or array obj, return a compact object.
A compact object is the same as the original object, except with keys containing falsy values removed. This operation applies to the object and any nested objects. Arrays are considered objects where the indices are keys. A value is considered falsy when Boolean(value) returns false.
You may assume the obj is the output of JSON.parse. In other words, it is valid JSON.
Examples
Example 1
Input: obj = [null, 0, false, 1]
Output: [1]
Explanation: All falsy values have been removed from the array.
Example 2
Input: obj = {"a": null, "b": [false, 1]}
Output: {"b": [1]}
Explanation: obj["a"] and obj["b"][0] had falsy values and were removed.
Example 3
Input: obj = [null, 0, 5, [0], [false, 16]]
Output: [5, [], [16]]
Explanation: obj[0], obj[1], obj[3][0], and obj[4][0] were falsy and removed.
Constraints
obj is a valid JSON object
2 <= JSON.stringify(obj).length <= 106
2705. Compact Object
Medium
30 Points
Given an object or array obj, return a compact object.
A compact object is the same as the original object, except with keys containing falsy values removed. This operation applies to the object and any nested objects. Arrays are considered objects where the indices are keys. A value is considered falsy when Boolean(value) returns false.
You may assume the obj is the output of JSON.parse. In other words, it is valid JSON.
Examples
Example 1
Input: obj = [null, 0, false, 1]
Output: [1]
Explanation: All falsy values have been removed from the array.
Example 2
Input: obj = {"a": null, "b": [false, 1]}
Output: {"b": [1]}
Explanation: obj["a"] and obj["b"][0] had falsy values and were removed.
Example 3
Input: obj = [null, 0, 5, [0], [false, 16]]
Output: [5, [], [16]]
Explanation: obj[0], obj[1], obj[3][0], and obj[4][0] were falsy and removed.