Mobile version of tech blog https://jianghushinian.cn/, covering Golang, Docker, Kubernetes and beyond.
An in‑depth exploration of Go’s sync.Map reveals its concurrent map implementation, covering core structures, read‑only and dirty maps, entry states, and detailed walkthroughs of Store, Load, Delete, Range, Clear, and advanced operations like LoadOrStore, CompareAndSwap, and CompareAndDelete with code examples.
This article demonstrates how to implement a MultiBytes struct in Go that converts a [][]byte slice into an io.Reader (and io.Writer), detailing the design, method implementations, and example usage with full source code.
This article introduces Go's built‑in os/exec package, explains its exported types and methods, demonstrates how to run commands synchronously or in the background, capture output, handle pipes, environment variables, working directories, and shows a practical case study using the tempredis library to start a Redis server programmatically.
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.
