Circular Array Printing | Dataford Interview Questions

Photon's event viewer stores event identifiers in an array. Given a starting index, return every event exactly once by traversing forward and wrapping from the last element back to the first.

The traversal must preserve the array's circular order. For example, starting at index 2 in a five-element array visits indices 2, 3, 4, 0, 1.

Formal Specification

Implement circular_order(events, start_index):

events is a non-empty list of values.
start_index is an integer from 0 through len(events) - 1.
Return a new list containing all elements of events, beginning at start_index and continuing forward with wraparound.
Do not modify events.

Constraints

1 <= len(events) <= 10^5
0 <= start_index < len(events)
events may contain duplicate values
The input list must not be modified

Function Signature

def circular_order(events, start_index):

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