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Grokking the Coding Interview Patterns in Go

Solution: Intersection of Two Arrays

Understand how to solve the intersection of two arrays problem by leveraging hash maps. Explore an approach that ensures each element is processed once, avoids duplicates, and runs efficiently with linear time complexity. Learn step-by-step how to build and use a dictionary to track elements and return a unique intersection array.

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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 ...