Programming Tutorials and Coding Guides - Page 11

Golang linting with go vet and golangci-lint; go lint command meaning versus go vet; golang linter setup; nolint:gosec and targeted nolint directives; gofmt goimports; golint deprecated.

Golang get ip address and golang get local ip: net.InterfaceAddrs and Interfaces for linux get local ip, golang get hostname with LookupHost, go get ip address heuristics, golang get local ip address without loopback, …

Golang url values and url.Values.Encode to add query parameters; golang http request parameters from r.URL.Query; golang url parameters with Set and Add; avoid raw fmt.Sprintf for untrusted strings. Related HTTP overview …

Golang http post json and golang post request with json body using net/http: http.NewRequest with bytes.Reader, Content-Type application/json, json.Marshal, and a minimal server decode with json.Decoder; httptest example …

Golang performance versus Java, Python, Node.js, and C; why the Go language feels fast for servers; golang performance benchmark with go test; golang closure performance basics; links to official docs and community …

Is go pass by value or reference: Go passes arguments by value; golang pass by reference means passing pointers. go pass by value for structs; slices and maps alias shared data. golang pass by reference or value, golang …

Print struct golang and go print struct with fmt.Printf verbs (%v %+v %#v), golang pretty print struct via encoding/json, golang print type of variable with %T and reflect.TypeOf, fmt.Stringer, and optional go-spew.

Golang queue implementation for FIFO: slice append and reslice, golang fifo queue memory notes, container/list, buffered channel go queue, generics helpers, peek and empty checks, concurrency hints, and links to channels …

Golang interactive CLI and golang prompt for input with bufio; golang.org/x/term ReadPassword with os.Stdin.Fd; promptui golang and survey; go-prompt (c-bata); notes on TTYs and cross-platform terminals.

Golang read file and golang read entire file with os.ReadFile; golang open file and os.OpenFile flags; golang overwrite file and append; update one field of big file golang via temp file rename or streaming; WriteAt …

Golang multiline string with raw backticks and escapes; golang read stdin and golang read line from stdin using fmt.Scan tokens, bufio.Reader ReadString, and bufio.Scanner; EOF and token size notes; not golang multiline …

Golang random bool and golang random boolean with math/rand Intn and Float64, golang rand local source for tests, random boolean generator patterns in Go, and crypto/rand when you need unpredictable bits—not Python or …

Remove entries from a map in Go with the built-in delete(map, key); deleting a missing key is safe; use the comma-ok form first when you want to log or branch on absent keys.

How to take input in golang and golang get user input from stdin: fmt.Scan Scanln Scanf for typed tokens, golang read input with bufio; go read user input and how to get user input in go with line-based reads; input …

Go print type and golang print type of variable with fmt %T; golang get type via reflect.TypeOf and Kind; pointers, interface{}, and nil; type switches; golang print object as dynamic concrete type.

Golang panic and go panic: how unwinding works with defer; golang recover from panic and go recover panic in a deferred function (go catch panic / golang catch panic pattern); panic vs errors and os.Exit; logging with …

golang math pow and go math.pow with math.Pow(x,y float64); golang power examples, integer casts and overflow pitfalls, special cases from pkg.go.dev, and alternatives for exact integer exponentiation.

Golang string padding and go padding with fmt.Printf and Sprintf: golang pad string with spaces or zeros, golang format int with leading zeros, golang format float width and precision; optional golang.org/x/text/number.

Golang get current directory and golang get cwd: os.Getwd for golang get current working directory and golang get pwd, golang print current directory, golang get current path with filepath.Abs, go get current directory …

HashiCorp go-memdb (mem db): golang in memory database with MVCC, schema and id primary index, Txn insert query LowerBound Get First, delete and DeleteAll; not SQL or DynamoDB.

Use golang defer to schedule a function call when the surrounding function returns; arguments are evaluated immediately; multiple defers run in LIFO order; avoid defer in tight loops without an inner function.

Golang garbage collection and golang gc: go garbage collector basics, heap in golang and HeapAlloc, golang force garbage collection with runtime.GC, GOGC and GOMEMLIMIT, gctrace, pprof, and garbage collection in go for …

Go has no default parameter values at compile time; use zero-value checks, variadic trailing arguments, a struct of fields, or a map[string]any with defaults applied in the function body.

Create nested directories in Go with os.Mkdir per level, os.MkdirAll for a full path in one call, filepath.Join for portable paths, optional os.Stat guards, or exec.Command mkdir -p when shell semantics are acceptable.

Golang math package and pkg.go.dev math docs: math.MaxInt32 math.MinInt32 math.MaxInt64 math.MinInt64 constants, math.MaxInt math.MinInt, Pi and float64 functions, quadratic example, math/big math/bits math/cmplx …

Copy or clone a map in Go: a new map with a range loop duplicates keys but may share slice, map, or pointer values (shallow copy); duplicate nested data with copy(), JSON marshal/unmarshal, or type-specific logic for a …

Golang length of map and golang map len with builtin len; golang get length of map and go length of map for key count; nil map length zero; golang size of map vs counting nested slice values with range.

Copy a file in Go with os.Open, io.Copy to os.Create, then os.Chmod from os.FileInfo.Mode; or use os.ReadFile and os.WriteFile with the source mode; os.Rename moves within a filesystem rather than copying.

Golang hello world and go hello world: hello world golang program with package main, hello world in golang and go language hello world using fmt.Println, golang hello world example with go mod init, go run and go hello …

Golang packaging with Go modules and golang package structure; golang package naming convention and exports; import paths, internal, cmd layout; golang package design and adding dependencies—go packages tutorial style.