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This article walks through a common Java scenario of matching two large lists with nested loops, measures the poor performance, then demonstrates two optimizations—adding a break statement and replacing the inner loop with a HashMap—to dramatically cut execution time.
This step‑by‑step guide explains how to set up Ctrip's open‑source Apollo configuration center, create projects and namespaces, integrate it with a SpringBoot application, and deploy the app on Kubernetes while demonstrating dynamic updates, rollbacks, clustering, and environment switching.
This article introduces Multipass, a lightweight free‑open‑source VM manager from Canonical, walks through its installation on Windows, demonstrates how to list, launch, inspect, enter, pause, restart, delete and automate Ubuntu instances using concrete command‑line examples and configuration files.
This article examines three server‑to‑client push techniques—polling, WebSocket, and Server‑Sent Events (SSE)—by detailing their mechanisms, listing concrete drawbacks and advantages, comparing them side‑by‑side, and providing step‑by‑step Node.js demos for real‑time dashboards and chat scenarios.
This article explains what Podman is, compares its daemon‑less, rootless architecture to Docker's daemon‑based model, and provides step‑by‑step installation, configuration, and command‑line examples for managing containers, images, volumes, and networking on Linux.
This tutorial walks through creating a generic BaseController that provides CRUD, list, pagination, and count operations for any entity by adding MyBatis‑Plus, writing a utility class for query building, configuring a pagination interceptor, and extending the base class in concrete controllers, all illustrated with complete Java code snippets.
This article analyzes the pain points of manually maintaining common fields in order‑related entities and presents a production‑tested solution that combines MyBatis‑Plus automatic filling, custom AOP annotations, multi‑data‑source handling, distributed ID generation, and auditing to dramatically reduce boilerplate code and bugs.
The article analyzes DeepSeek's rapid adoption, detailing its seven core models, the third‑generation MoE architecture, FP8 mixed‑precision training, 128K context window, benchmark superiority on MMLU/HumanEval/CMMLU, low training cost, and fully open‑source release, while also introducing a companion guide for developers.
This guide walks through the problem of server‑initiated push in a Spring Boot project, explains why WebSocket is needed over HTTP, and provides step‑by‑step Maven setup, configuration classes, controller code, a test HTML page, and troubleshooting tips for proper initialization.
This tutorial walks through creating a fire‑equipment inspection system where a mobile client reports anomalies and a backend pushes real‑time updates to a monitoring page using WebSocket, with a Vue front‑end and SpringBoot server implementation.
