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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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15
codes/typescript/chapter_array_and_linkedlist/my_list.ts
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@@ -29,24 +29,23 @@ class MyList {
/* 访问元素 */
public get(index: number): number {
// 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 */
public set(index: number, num: number): void {
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;
}
/* 尾部添加元素 */
public add(num: number): void {
// 如果长度等于容量，则需要扩容
if (this._size === this._capacity) {
if (this._size === this._capacity)
this.extendCapacity();
}
// 将新元素添加到列表尾部
this.nums[this._size] = num;
this._size++;
@@ -54,9 +53,8 @@ class MyList {
/* 中间插入元素 */
public insert(index: number, num: number): void {
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 +70,8 @@ class MyList {
/* 删除元素 */
public remove(index: number): number {
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++) {