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Given a shifted array of sorted unique integers, write a function
findTargetIndex that returns the index of a
You are given an array of sorted integers that has been shifted by some number of spots. For example:
- Original array:
[0, 1, 2, 3, 4, 5, 6, 7, 8]
- Shifted array:
[3, 4, 5, 6, 7, 8, 0, 1, 2]
It is the same values in the same order but with the array rotated.
You can assume all the numbers in the array are unique.
If the number doesn't exist in the array, you should return
const items = [3, 4, 5, 6, 7, 8, 0, 1, 2]; const target = 5; findTargetIndex(items, target) // 2
Validate My Answer
Ensure you have handled cases where the target exist and doesn't exist in the input array.
Since the array is mostly sorted, you can still use a modified version of binary search to get O(log n) time.