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Merge pull request itwanger#46 from ThinkingBook/patch-1
Update arraydeque.md
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docs/collection/arraydeque.md

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@@ -35,7 +35,7 @@ Java 里有一个叫做*Stack*的类,却没有叫做*Queue*的类(它是个
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|| offerFirst(e) | 向栈顶插入元素,失败则返回`false` |
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| pop() | removeFirst() | 获取并删除栈顶元素,失败则抛出异常 |
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|| pollFirst() | 获取并删除栈顶元素,失败则返回`null` |
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| peek() | peekFirst() | 获取但不删除栈顶元素,失败则抛出异常 |
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| peek() | getFirst() | 获取但不删除栈顶元素,失败则抛出异常 |
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|| peekFirst() | 获取但不删除栈顶元素,失败则返回`null` |
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上面两个表共定义了*Deque*的 12 个接口。
@@ -203,4 +203,4 @@ public E peekLast() {
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