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添加1047.删除字符串中的所有相邻重复项 Ruby实现

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`@@ -475,6 +475,26 @@ impl Solution {`
`475`	`475`	`}`
`476`	`476`	```
`477`	`477`
	`478`	`+### Ruby`
	`479`	`+`
	`480`	+```ruby
	`481`	`+def remove_duplicates(s)`
	`482`	`+ #数组模拟栈`
	`483`	`+ stack = []`
	`484`	`+ s.each_char do \|chr\|`
	`485`	`+ if stack.empty?`
	`486`	`+ stack.push chr`
	`487`	`+ else`
	`488`	`+ head = stack.pop`
	`489`	`+ #重新进栈`
	`490`	`+ stack.push head, chr if head != chr`
	`491`	`+ end`
	`492`	`+ end`
	`493`	`+`
	`494`	`+ return stack.join`
	`495`	`+end`
	`496`	+```
	`497`	`+`
`478`	`498`	`<p align="center">`
`479`	`499`	`<a href="https://programmercarl.com/other/kstar.html" target="_blank">`
`480`	`500`	`<img src="../pics/网站星球宣传海报.jpg" width="1000"/>`

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