Given two arrays, write a function to compute their intersection.
Example: Given nums1 = [1, 2, 2, 1], nums2 = [2, 2], return [2].
Note:
- Each element in the result must be unique.
- The result can be in any order.
intersection: 交集
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Given two arrays, write a function to compute their intersection.
Example: Given nums1 = [1, 2, 2, 1], nums2 = [2, 2], return [2].
Note:
intersection: 交集
见程序注释