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Fix the index out of bound check in my_list.

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This commit is contained in:
Yudong Jin
2023-01-30 17:50:07 +08:00
parent 15c798046a
commit ddd5562b60
11 changed files with 90 additions and 98 deletions
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12
codes/javascript/chapter_array_and_linkedlist/my_list.js
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@ -29,15 +29,15 @@ class MyList {
/* 访问元素 */
get(index) {
// 索引如果越界则抛出异常，下同
if (index >= this.#size) {
if (index < 0 || index >= this.#size)
throw new Error('索引越界');
}
return this.#nums[index];
}
/* 更新元素 */
set(index, num) {
if (index >= this._size) throw new Error('索引越界');
if (index < 0 || index >= this.#size)
throw new Error('索引越界');
this.#nums[index] = num;
}
@ -54,9 +54,8 @@ class MyList {
/* 中间插入元素 */
insert(index, num) {
if (index >= this.#size) {
if (index < 0 || index >= this.#size)
throw new Error('索引越界');
}
// 元素数量超出容量时，触发扩容机制
if (this.#size === this.#capacity) {
this.extendCapacity();
@ -72,7 +71,8 @@ class MyList {
/* 删除元素 */
remove(index) {
if (index >= this.#size) throw new Error('索引越界');
if (index < 0 || index >= this.#size)
throw new Error('索引越界');
let num = this.#nums[index];
// 将索引 index 之后的元素都向前移动一位
for (let j = index; j < this.#size - 1; j++) {