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Update a comment in randomAccess()

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Yudong Jin 2023-01-17 02:10:52 +08:00
parent 5b99d8b4f3
commit 70c1dba1cd
3 changed files with 10 additions and 5 deletions
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4
codes/csharp/chapter_array_and_linkedlist/array.cs
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@ -11,8 +11,10 @@ namespace hello_algo.chapter_array_and_linkedlist
/* 随机返回一个数组元素 */ /* 随机返回一个数组元素 */
public static int RandomAccess(int[] nums) public static int RandomAccess(int[] nums)
{ {
Random random = new(); Random random=new();
// 在区间 [0, nums.Length) 中随机抽取一个数字
int randomIndex = random.Next(nums.Length); int randomIndex = random.Next(nums.Length);
// 获取并返回随机元素
int randomNum = nums[randomIndex]; int randomNum = nums[randomIndex];
return randomNum; return randomNum;
} }

4
codes/python/chapter_array_and_linkedlist/array.py
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@ -10,8 +10,8 @@ from include import *
""" 随机访问元素 """ """ 随机访问元素 """
def randomAccess(nums): def randomAccess(nums):
# 在区间 [0, len(nums)) 中随机抽取一个数字 # 在区间 [0, len(nums)-1] 中随机抽取一个数字
random_index = random.randint(0, len(nums)) random_index = random.randint(0, len(nums) - 1)
# 获取并返回随机元素 # 获取并返回随机元素
random_num = nums[random_index] random_num = nums[random_index]
return random_num return random_num

7
docs/chapter_array_and_linkedlist/array.md
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@ -111,6 +111,7 @@ elementAddr = firtstElementAddr + elementLength * elementIndex
```java title="array.java" ```java title="array.java"
/* 随机返回一个数组元素 */ /* 随机返回一个数组元素 */
int randomAccess(int[] nums) { int randomAccess(int[] nums) {
// 在区间 [0, nums.length) 中随机抽取一个数字
int randomIndex = ThreadLocalRandom.current(). int randomIndex = ThreadLocalRandom.current().
nextInt(0, nums.length); nextInt(0, nums.length);
int randomNum = nums[randomIndex]; int randomNum = nums[randomIndex];
@ -136,8 +137,8 @@ elementAddr = firtstElementAddr + elementLength * elementIndex
```python title="array.py" ```python title="array.py"
""" 随机访问元素 """ """ 随机访问元素 """
def randomAccess(nums): def randomAccess(nums):
# 在区间 [0, len(nums)) 中随机抽取一个数字 # 在区间 [0, len(nums)-1] 中随机抽取一个数字
random_index = random.randint(0, len(nums)-1) random_index = random.randint(0, len(nums) - 1)
# 获取并返回随机元素 # 获取并返回随机元素
random_num = nums[random_index] random_num = nums[random_index]
return random_num return random_num
@ -195,7 +196,9 @@ elementAddr = firtstElementAddr + elementLength * elementIndex
int RandomAccess(int[] nums) int RandomAccess(int[] nums)
{ {
Random random=new(); Random random=new();
// 在区间 [0, nums.Length) 中随机抽取一个数字
int randomIndex = random.Next(nums.Length); int randomIndex = random.Next(nums.Length);
// 获取并返回随机元素
int randomNum = nums[randomIndex]; int randomNum = nums[randomIndex];
return randomNum; return randomNum;
} }