Write a function merge_arrays(arr1, arr2) that merges two sorted arrays into a single sorted array without using built-in sort.
Example:
Input: arr1 = [1, 3, 5], arr2 = [2, 4, 6]
Output: [1, 2, 3, 4, 5, 6]
Constraints:
Test Cases
Test Case 1
Input:
[1, 3, 5], [2, 4, 6]Expected:
[1, 2, 3, 4, 5, 6]Test Case 2
Input:
[1, 2, 3], [4, 5, 6]Expected:
[1, 2, 3, 4, 5, 6]Test Case 3
Input:
[], [1, 2, 3]Expected:
[1, 2, 3]+ 2 hidden test cases