Tuan Nguyen

Gopath vs goroot and goroot vs gopath: what is goroot (go root / golang goroot), GOPATH for your workspace, why GOPATH and GOROOT must not be the same directory, go env GOROOT and go env GOPATH, modules and GOMODCACHE, …

Golang new error and golang create error with errors.New and fmt.Errorf; errors new golang patterns, sentinels, errors.Is, %w wrapping, and custom types implementing error.

Golang append and append golang: golang add to slice, golang append to slice and golang slice append with variadic ..., golang append slice to slice, go append to array semantics, []byte plus string append, and always …

Golang init and go init: func init() rules, init order across imports and files, multiple init functions, blank imports, when to use or avoid init(), with spec-aligned examples.

Golang prompt for input and go interactive cli: read lines from stdin with bufio for a go prompt, yes/no prompts, Scanln loops, and validation with strconv; note c-bata go-prompt library vs stdlib for golang prompt and …

Go get specific version and go get version with modules: go get with version and go get package version using @v1.2.3, go list for go get version of package, go update package to specific version with @latest and …

Drain a golang io.Reader or io.ReadCloser into a string with io.ReadAll and string(b), or stream with strings.Builder and io.Copy or bytes.Buffer.ReadFrom; use strings.NewReader when you need a reader from a string.

Golang remove from slice and delete element from slice golang: by index with order, swap-pop without order, first element, and safe patterns while iterating.

Turn a Go []byte or byte buffer into an io.Reader with bytes.NewReader, use strings.NewReader for text, then read with io.ReadAll or io.Copy when you need bytes or strings back from a reader.

Convert HTML to text in Go, strip HTML tags, read HTTP response body with io.ReadAll, parse HTML with golang.org/x/net/html, extract body text or body HTML, and know when html2text or bluemonday fits better.

URL encode and decode strings in Go with net/url: QueryEscape, QueryUnescape, PathEscape, PathUnescape, url.Values, ParseQuery, and url.Parse with RawQuery.

Learn how type assertion works in Go on interface values: concrete types, x.(T) vs comma-ok, panic rules, type switches, and how assertion differs from type conversion.

Remove backslash from a string in Go with strings.ReplaceAll or strings.Replace, including raw literals and optional cleanup. Related: golang remove substring and golang remove characters.

Golang reflection with reflect.TypeOf and reflect.ValueOf, Kind vs Type, struct fields and tags, settable values and Set, reflect.New, MakeSlice MakeMap MakeChan, MakeFunc wrappers, StructOf limits, Value.Call, …

Deep guide to json.Unmarshal in Go: []byte and pointer rules, structs with tags, maps and float64 numbers, slices, nested JSON, any decoding, null, json.RawMessage, unknown fields vs Decoder.DisallowUnknownFields, …

Learn how to parse JSON in Go using encoding/json: JSON strings, files, HTTP bodies, structs, maps, nested data, json.Unmarshal, json.Decoder, and common errors.

Learn how to uninstall Golang (Go compiler) on Linux, macOS, and Windows. This guide explains how to remove Go installed using tarball archives, package managers, Homebrew, or installers, including cleaning environment …

Compare the best IDEs and editors for Go development: VS Code, GoLand, Neovim, Zed, LiteIDE, Sublime Text, and Emacs—use cases, trade-offs, setup checklist, and legacy tools to avoid.

Step by step instructions to upgrade go in Linux, Windows and MacOS.

30+ golang interview questions and answers for Junior (Beginner), Middle and Advanced (Experienced) professionals

In this tutorial we learned how to create HTTP Server and Client using golang JWT (JSON Web Token)

In this series, we will learn how to set up a serverless framework example for Golang and AWS Lambda. First of all, we are going to walk through how to create

Comparing different aspects of golang with rust programming language

Discover the transformative power of Golang Chi in web development. Our comprehensive guide provides insights and practical knowledge, equipping you to create robust, flexible, and efficient web services, mastering the …

In this example we will use golang channel to fetch the goroutine return value:

Golang sqlite tutorial with CRUD Operation. Executing commands on SQLITE database, Select statement, Insert, Read and Delete Operation with examples

golang viper tutorial to source YAML, JSON or ENV files and get variables. Set default values for empty or missing variables using viper.SetDefault

In the previous article, I introduced to you the ways to work with SQL in Golang. You don't need to change the defaults for the sql.DB connection pool for the

Multiple examples covering golang generate random string using rand function. Generate alphanumeric, special characters, uppercase, lowercase strings

This article describes a few methods for determining whether a struct in Go is empty. It includes structs having fields that are comparable and