Resources and tutorials for programmers' advanced learning journey. Advanced tracks in Java, Python, and C#. Blog: https://blog.csdn.net/badao_liumang_qizhi
This guide walks through deploying a PostgreSQL instance with the PostGIS extension on a CentOS server using Docker Compose, covering image retrieval, docker‑compose configuration, environment variables, logging settings, container startup, and verification of PostGIS integration.
This article walks through Docker's default docker0 bridge, explains how containers obtain IP addresses via veth‑pair interfaces, demonstrates inspecting container IPs, and shows how to create and use custom bridge networks so containers can communicate by name or IP, including adding existing containers to the new network.
This guide walks non‑specialist GIS developers through front‑end mapping with Vue, OpenLayers and Leaflet, back‑end processing with Java, GeoTools and PostGIS, and practical solutions for common GIS toolchain challenges.
This guide explains the national Software Designer certification’s value, outlines the role’s responsibilities, and provides concrete study techniques, high‑frequency topics, memory mnemonics, and example questions to help candidates quickly master the multiple‑choice section.
To avoid common MySQL pitfalls, the article compiles practical SQL writing guidelines—selecting specific columns instead of *, using LIMIT 1, avoiding OR in WHERE, optimizing pagination, handling LIKE patterns, minimizing redundant indexes, preferring INNER JOIN, and leveraging covering indexes and EXPLAIN for efficient query execution.
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.
