Array Intersection

HardArraysPRO

Practice JavaScript array intersection by returning the unique values shared by two lists while preserving the first list's order. This restored legacy exercise focuses on duplicate handling, empty inputs, and keeping both source arrays unchanged.

What you'll practice

Work with JavaScript array intersection by returning the unique values shared by two lists while preserving the first list's order
This restored legacy exercise focuses on duplicate handling
Empty inputs
Keeping both source arrays unchanged

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