Detailed explanation of java HashMap source code

Article directory Detailed explanation of java HashMap source code HashMap source code 1 put method process 2 expansion 3 get method Detailed explanation of java HashMap source code Java HashMap is an implementation of the Map interface based on a hash table, which can store a data structure of key-value pairs. The characteristics of HashMap […]

Do you really know how to use EXPLAIN in MySQL?

EXPLAIN is a powerful tool in MySQL database for query performance analysis and optimization. Through EXPLAIN, you can view the execution plan of the MySQL query and understand how MySQL executes your query statement. This article will introduce the use of EXPLAIN in detail to help you better understand and optimize MySQL queries. Why use […]

12. Strings and regular expressions

Use regular expressions Related knowledge about regular expressions When writing programs or web pages that process strings, you often need to find strings that conform to some complex rules. Regular expressions are tools used to describe these rules. In other words, regular expressions are a tool. Defines the matching pattern of a string (how to […]

Python generates a pair of RSA keys and saves the public and private keys as .pem files respectively. Use the public key in the generated RSA key pair to encrypt the data, and then use the private key to decrypt. Convert RSA’s public key exponent (E) and modulus (N) to .pem format

You can use the cryptography library to generate a pair of RSA keys and save the public and private keys as .pem files respectively. Here is a sample code: from cryptography.hazmat.backends import default_backend from cryptography.hazmat.primitives import serialization from cryptography.hazmat.primitives.asymmetric import rsa # Generate RSA key pair private_key = rsa.generate_private_key( public_exponent=65537, key_size=2048, backend=default_backend() ) # Get […]

SpringBoot integrates Ldap–super detailed method explanation

LADP Overview LDAP (Lightweight Directory Access Protocol) is a protocol for accessing and maintaining distributed directory information services. Directory service is a service for storing and retrieving information. It is usually used to store user information, organizational structure, network equipment and other data within an organization. LDAP is a lightweight protocol designed for lookup and […]

nginx website service (1. Small experiment)

nginx is a high-performance and lightweight web service software that provides static page services, that is, files in plain text format, usually files with the suffix .html or .htm. Features: Average stability (lots of bugs, so updates and iterations are fast) Open source (free), can be repackaged (secondary development) The consumption of system resources is […]

EDA experiment—–Design of four-bit multiplier (QuartusII)

Table of Contents 1. Experimental purpose 2. Experimental equipment 3. Experimental principles 4. Experimental content 5. Experimental steps 6. Experimental results 7. Experimental process 1. Multiplier principle 2. Programming ideas and programming implementation 3. Simulation test 4.Circuit connection 5. File burning 1. Experimental purpose Understand the principles of four-bit parallel multipliers. Understand the design ideas […]

OneAPI Intel Experimental Matrix Multiplication Implementation

Introduction to OneAPI oneAPI is a cross-platform, open and unified programming model designed to simplify and accelerate heterogeneous computing. It is led by Intel Corporation and supported by a wide range of partners. The goal of oneAPI is to provide a unified programming environment that enables developers to write high-performance applications on different hardware architectures, […]