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Grokking the Coding Interview Patterns in Python

Solution: Intersection of Two Arrays

Explore the use of hash maps to efficiently identify unique elements common to two arrays. Understand how this method optimizes time complexity to O(n + m) and limits space usage, preparing you to solve similar coding interview problems effectively.

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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 ...