Mobile version of tech blog https://jianghushinian.cn/, covering Golang, Docker, Kubernetes and beyond.
This article introduces the Go library tempredis, which can start and automatically clean up temporary Redis server instances for isolated testing, explains its main features, setup steps, API overview, and provides a complete example demonstrating how to integrate it with go-redis in a Go project.
This article explains the purpose, internal implementation, and correct usage patterns of Go's sync.Cond concurrency primitive, walks through its source code, demonstrates simple and advanced examples—including a custom concurrent waiting queue—and provides test cases to illustrate its behavior in real-world scenarios.
This article explains how Go developers can break circular import problems in the context package by using XTest‑prefixed helper functions together with a regular Test wrapper, and also demonstrates the export_test.go "backdoor" technique for accessing unexported symbols in black‑box tests.
This article thoroughly explains the design and implementation of Go's context package, covering its core interfaces, various concrete types, cancellation propagation, deadline handling, value storage, and the internal mechanisms that enable concurrent-safe control flow and data passing across context trees.
singleflight, a Go concurrency primitive from the x/sync package, merges duplicate in‑flight requests to reduce server load, with detailed usage examples, source code analysis, and discussion of its differences from sync.Once and typical application scenarios such as cache‑penetration, remote calls, and task deduplication.
This article explains the browser same‑origin policy, defines cross‑origin requests, details the CORS mechanism—including simple and non‑simple requests and their required HTTP headers—and provides practical Go examples using Gin middleware and Kubernetes to solve CORS issues.
This article explains how to add colors to terminal output using the Go language, introduces the fatih/color package with practical code examples, demonstrates mixing colors, writing to files, building a Cobra-based CLI demo, and details the underlying ANSI escape sequence mechanism.
The author details both manual and one‑click migration of roughly 500 GB and 760 000 files from an older Intel‑based MacBook Air to a new M‑chip MacBook Pro, covering setup, SSH key handling, transferred settings, and a useful cursor‑speed command.
This article explains Go's error‑handling shortcomings, introduces the popular third‑party pkg/errors library, demonstrates how to wrap errors with additional context and stack traces, and provides a detailed line‑by‑line walkthrough of its source files (errors.go, go113.go, stack.go) to reveal the underlying design and implementation.
This article explains how to implement graceful shutdown for Go programs, covering signal handling with os/signal, closing HTTP servers without interrupting active connections, managing goroutine lifecycles, and providing complete example code for both the standard net/http package and the Gin framework.
