Array vs Set

EasyPython

Problem

What's the difference between an array and a set? Implement unique_in_order(values) to demonstrate the distinction: the input array may contain duplicates and preserves order, while the set tracks membership without duplicates. Return a new array containing each value once, in its first-occurrence order.

Constraints

0 <= len(values) <= 1000
Values are hashable Python values
The output preserves the first occurrence of each value

Function Signature

def unique_in_order(values):

CodePython 3

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