349. Intersection of Two Arrays

题目

Given two arrays, write a function to compute their intersection.

Example: Given nums1 = [1, 2, 2, 1], nums2 = [2, 2], return [2].

Note:

1. Each element in the result must be unique.
2. The result can be in any order.

解题思路

intersection: 交集

见程序注释