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Add annotations to Queue.

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This commit is contained in:
Oleksii Trekhleb 2018-08-17 17:47:29 +03:00
parent 260f24b2cb
commit 5eea37837f
1 changed files with 16 additions and 0 deletions
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16
src/data-structures/queue/Queue.js
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@ -5,10 +5,16 @@ export default class Queue {
this.linkedList = new LinkedList(); this.linkedList = new LinkedList();
} }
/**
* @return {boolean}
*/
isEmpty() { isEmpty() {
return !this.linkedList.tail; return !this.linkedList.tail;
} }
/**
* @return {*}
*/
peek() { peek() {
if (!this.linkedList.head) { if (!this.linkedList.head) {
return null; return null;
@ -17,15 +23,25 @@ export default class Queue {
return this.linkedList.head.value; return this.linkedList.head.value;
} }
/**
* @param {*} value
*/
enqueue(value) { enqueue(value) {
this.linkedList.append(value); this.linkedList.append(value);
} }
/**
* @return {*}
*/
dequeue() { dequeue() {
const removedHead = this.linkedList.deleteHead(); const removedHead = this.linkedList.deleteHead();
return removedHead ? removedHead.value : null; return removedHead ? removedHead.value : null;
} }
/**
* @param [callback]
* @return {string}
*/
toString(callback) { toString(callback) {
return this.linkedList.toString(callback); return this.linkedList.toString(callback);
} }