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Commit 8e8f28f

H2rmone H2rmone

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Use exist method to be consistent with Stack (trekhleb#708)

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src/data-structures/queue
- Queue.js

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`‎src/data-structures/queue/Queue.js`

Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -21,7 +21,7 @@ export default class Queue {`
`21`	`21`	`* @return {*}`
`22`	`22`	`*/`
`23`	`23`	`peek() {`
`24`		`- if (!this.linkedList.head) {`
	`24`	`+ if (this.isEmpty()) {`
`25`	`25`	`return null;`
`26`	`26`	`}`
`27`	`27`

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