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Supplementary knowledge of credit card identification project 1. Template matching The principle of template matching is similar to that of convolution. The template slides from the origin on the original image to calculate the difference between the template and (where the image is covered by the template). There are six calculation methods ...

Character operation Encoding and decoding Encoding is to convert characters into bytes, while decoding is to recombine bytes into characters. If the encoding and encoding process use different encoding methods, there will be garbled code. In GBK coding, Chinese characters occupy 2 bytes and English characters occupy 1 byte;In UTF-8 coding, ...

Today's test 1,Write code to realize function tail -f access.log f.seek() Application (file object)/File handle (1) Application (file object)/File handle (2) Operating system (real file) a.txt z Hard disk (computer space) 2,Two ways to modify code display files Mode 1: with open('source file',mode='r') as src_ ...

When the browser executes the JS script, it will check whether the protocol, domain name and port number to be accessed by the script are consistent with the current web address. If not, it is cross domain. Cross domain is not allowed. This restriction is called the browser's homology policy. In a simple way, the browser does not allow scripts ...

Three modes of load balancing: https://grpc.io/blog/grpc-load-balancing/ ProxyThick client(Client side)Lookaside Load Balancing (Client side) Basic usage server side registration service Register the service information to the kv center when the service starts import( ... "go.etcd.io/etcd/client/v3" "go.etcd.io/etcd/client ...

In depth understanding of synchronized (Part 1) Thread safety problems caused by Java shared memory model public class SyncDemo { private static int count = 0; public static void increment(){ count++; } public static void decrement(){ count--; } public static void main(String[] args) throws InterruptedException { Thread t1 = new T ...

Comprehensive analysis of C array Array name The value of the array name is a pointer constant, that is, the address of the first element of the array Its type depends on the type of array element There are only two situations where array names are not represented by pointer constants------- ① sizeof (array name), calculate the size of the ...

This article introducesWe all know that the Spring Boot project consists of starters, such as web starters, redis starters and so on.By introducing the corresponding starter through maven, we can perfectly use the integrated spring mvc or redis without configurationSo how do we customize a starter?This article will show you how to use the auto ...

1706. Where does the ball meet Problem solution Title Source: 1706. Where does the ball meet 2022.02.24 one question per day Daily question column address: LeetCode daily problem solution is being updated ❤️💕 Today's topic is easier. After solving the problem, I'll pack my bags and go back to school tomorrow. I hope it's easy tomorrow, heh ...

Hello, I'm glacier~~ This article is pure dry goods. It deeply analyzes the Callable interface from the perspective of source code. I hope you can step down, open your IDE, and follow the article to see the source code. I believe you will gain a lot. 1. Introduction to callable interface The Callable interface is jdk1 5 new generic interface ...