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Use of Python 3.8 (Coding): Search in Rotated Array Test
The Search in Rotated Sorted Array problem involves finding a target value in a rotated sorted array. The solution approach is to start by initializing two pointers, left and right, which represent the boundaries of the search range. Initially, left = 0 and right = len(nums) - 1. a. Calculate the mid index as mid = (left + right) // 2. b. Check if the value at the mid index (nums[mid]) is equal to the target value. If it is, we have found the target and can return the mid index. c. If nums[left] <= nums[mid], it means the left half of the array is sorted in ascending order. Check if the target value lies within the sorted left half, i.e., nums[left] <= target < nums[mid]. If it does, update right = mid - 1 to search the left half. If the target value does not lie within the sorted left half, update left = mid + 1 to search the right half. d. If nums[mid] <= nums[right], it means the right half of the array is sorted in ascending order. Check if the target value lies within the sorted right half, i.e., nums[mid] < target <= nums[right]. If it does, update left = mid + 1 to search the right half. If the target value does not lie within the sorted right half, update right = mid - 1 to search the left half. Repeat steps 2b-2d until the target value is found or the search range is exhausted (left > right). If the target value is not found after the search range is exhausted, return -1 to indicate that the target is not present in the array.
