OpenCV之那些年我走过的坑

1.OpenCV保存的单通道图会变成3通道

eg:

img = cv2.imread('image.jpg')
b = img[:,:,0]
print("此时为单通道:", b.shape)
cv2.imwrite('image_b.jpg',b)
b = cv2.imread('image_b.jpg')
print("此时为三通道:", b.shape)
1
2
3
4
5
6

分糖果python

class Solution: def distributeCandies(self, candyType: List[int]) -> int: return min(len(set(candyType)), len(candyType) // 2)

chrom后端设置cookie失败跨域问题报错the set-cookie had to have been set with “sameSite=None“ to enable cross-si

vue项目运行登录后，后端设置了cookie；但是我是本地起得项目所以现在一直报错登录过期问题；一、后端设置的set-cookie黄色警告报错the set-cookie had to have been set with “sameSite=None” to enable cross-site usageSamesite有三个值，None, Lax,Strict.这个参数是防止跨站攻击用的，因为测试环境，所以最方便就是跨站调试了。刚开始设置cookie 的Domain无效后来经过一番翻云

LightOJ - 1245 Harmonic Number (II) (找规律)

题目大意：给出一个n（1 <= n < 2^31）求出H(n)的结果，H(n)的定义为下：分析：对于一个n，设 t = n / i：　　满足 t >= 1的有多少个呢？　　有 n / 1 个。　　满足 t >= 2的有多少个呢？　　有 n / 2 个。　　……　　满足 t >= k的有多少个呢？　　有 n / k 个。以上结论不难...

Python关于None的报错：\'NoneType\' object is not iterable和cannot unpack non-iterable NoneType object_Samven_7的博客-CSDN博客

关于None值的报错一、TypeError:‘NoneType’ object is not iterable（Type错误：\'NoneType’对象不是可迭代的）原因：遍历的对象为 None 。例子：items = Nonefor item in items: print(item)报错：Traceback (most recent call last):File ...

some advise to write Front end Engineer resume

How to w rite a good resume about the front-end engineer? Firstly,in my opinions,we should make the greatest efforts to reflect that you are a good front-end engineer.What is the professional