The last two methods, element and peek , are for querying the element at the head of the queue.

后两个方法element和peek用于在队列的头部查询元素。

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This article demonstrates how to configure a queue so that as it approaches being full, messages at the head of the queue are deleted.

本文演示如何配置一个队列，以便当队列快满员时，删除队列最前面的消息。

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At the head of the queue was an old woman.

在队列的前面有一个老妇人。

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At the head of the queue was Kinue, who lives in east London.

BBC: It was hardly a scrum.

According to Harry Harris, the Portugal boss has "jumped to the head of the queue" with Stuart Pearce lined up as his assistant.

BBC: SPORT | Football | Internationals | Who will get Sven's job?

His quick work put HP, perhaps the largest buyer of computer components in the world, at the head of the queue for the suddenly-scarce parts.

FORBES: Shadow Market Keeps Computer Components Flowing