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Grokking the Coding Interview Patterns

Solution: Intersection of Two Arrays

Understand how to use hash maps to find the unique intersection between two arrays efficiently. This lesson helps you grasp the concept of recording elements from one array and checking their presence in another without duplicates, improving your coding interview skills with optimal time and space complexity.

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Statement

You are given two integer arrays, arr1 and arr2. Your task is to return a new array containing the intersection of both arrays.

  • Each element in the result must be unique.

  • The order of the elements in the result does not matter.

Constraints

  • 1≤1 \leq arr1.length, arr2.length ≤1000\leq 1000 ...