Resources and tutorials for programmers' advanced learning journey. Advanced tracks in Java, Python, and C#. Blog: https://blog.csdn.net/badao_liumang_qizhi
Using JMH, this article benchmarks Java switch statements, comparing the traditional int‑based switch (via String hashCode) against the newer String‑based switch, showing that the int version runs roughly twice as fast while warning about hashCode collisions.
Using JMH, the author benchmarks Java's switch‑case against if‑else and finds switch executes in about 0.44 ns per operation versus 1.55 ns for if‑else, with the gap widening as the number of branches increases.
This article provides a comprehensive guide to MySQL stored procedures, functions, custom functions, variables, control‑flow statements, cursors, and condition/handler definitions, illustrating creation, invocation, inspection, modification, and deletion with concrete SQL examples.
This article implements seven different HashMap traversal techniques in Java, benchmarks each with JMH, and shows that lambda‑based iteration and entrySet loops are the fastest, followed by Streams, while keySet‑based loops lag behind.
This guide walks through installing JDK and MySQL on Windows, configuring environment variables via batch scripts, adjusting Nginx paths, and using offline installation methods so that the entire stack—including data—can be copied to other machines for rapid, repeatable deployment.
This guide walks through setting up Jenkins with Docker Compose, installing Node.js, configuring npm to use the Taobao mirror, and creating a Jenkins pipeline to compile and package a Vue application, including troubleshooting tips for common errors.
This guide shows how to set up Jenkins on Windows using Docker Desktop and Docker Compose, create persistent volume directories, configure the compose file, adjust the update center to a domestic mirror, and retrieve the initial admin password.
This guide walks through enabling virtualization on Windows 10 Home, installing Hyper‑V via a batch script, spoofing the OS edition in the registry, installing Docker Desktop with the WSL 2 option disabled, and configuring Docker registry mirrors to pull images successfully.
This guide walks through the complete offline installation of FFmpeg on a CentOS server, covering prerequisite libraries (nasm, yasm, x264), verification of gcc and pkg‑config, compilation steps, troubleshooting missing x264, and finally using FFmpeg to pull an RTSP stream and push it to an RTMP server.
This tutorial demonstrates adding JsonPath to a Spring Boot project, using DSL‑style expressions to extract authors, titles, counts and filtered data from a sample JSON payload, and shows how to drive the extraction dynamically via configurable mappings with fastjson and hutool.
