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添加0349.两个数组的交集 Ruby实现

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`@@ -465,6 +465,25 @@ object Solution {`
`465`	`465`	`}`
`466`	`466`
`467`	`467`	```
	`468`	`+`
	`469`	`+###Ruby`
	`470`	+```ruby
	`471`	`+def intersection(nums1, nums2)`
	`472`	`+ hash = {}`
	`473`	`+ result = {}`
	`474`	`+`
	`475`	`+ nums1.each do \|num\|`
	`476`	`+ hash[num] = 1 if hash[num].nil?`
	`477`	`+ end`
	`478`	`+`
	`479`	`+ nums2.each do \|num\|`
	`480`	`+ #取nums1和nums2交集`
	`481`	`+ result[num] = 1 if hash[num] != nil`
	`482`	`+ end`
	`483`	`+`
	`484`	`+ return result.keys`
	`485`	`+end`
	`486`	+```
`468`	`487`	`## 相关题目`
`469`	`488`
`470`	`489`	`* [350.两个数组的交集 II](https://leetcode.cn/problems/intersection-of-two-arrays-ii/)`

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