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fix: handle single-node pops in linked-list deques (#1824)

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KingCrimsonJY
2026-10-10 19:18:20 +08:00
committed by GitHub
parent bd46fca90d
commit 5b279d48b3
12 changed files with 154 additions and 111 deletions
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codes/javascript/chapter_stack_and_queue/linkedlist_deque.js
+17 -7
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@@ -67,13 +67,18 @@ class LinkedListDeque {
return null;
}
const value = this.#rear.val; // 存储尾节点值
// 队列长度为 1 时, 头尾指向同一节点
if (this.#queSize === 1) {
this.#front = null;
this.#rear = null;
}
// 删除尾节点
let temp = this.#rear.prev;
if (temp !== null) {
else {
let temp = this.#rear.prev;
temp.next = null;
this.#rear.prev = null;
this.#rear = temp; // 更新尾节点
}
this.#rear = temp; // 更新尾节点
this.#queSize--;
return value;
}
@@ -83,14 +88,19 @@ class LinkedListDeque {
if (this.#queSize === 0) {
return null;
}
const value = this.#front.val; // 存储尾节点值
const value = this.#front.val; // 存储头节点值
// 队列长度为 1 时, 头尾指向同一节点
if (this.#queSize === 1) {
this.#front = null;
this.#rear = null;
}
// 删除头节点
let temp = this.#front.next;
if (temp !== null) {
else {
let temp = this.#front.next;
temp.prev = null;
this.#front.next = null;
this.#front = temp; // 更新头节点
}
this.#front = temp; // 更新头节点
this.#queSize--;
return value;
}