https://wiki.quizz.vn/ 2026-04-15T18:02:56+00:00 https://wiki.quizz.vn/ https://wiki.quizz.vn/lib/exe/fetch.php?media=wiki:dokuwiki.svg text/html 2026-01-08T23:46:17+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=go:stdlib:bufio&rev=1767915977&do=diff bufio package What is it? `bufio` implements buffered I/O by wrapping an `io.Reader` or `io.Writer` and using an in-memory buffer to make reading/writing more efficient. What is it used for? * Faster reading/writing for files and network connections. text/html 2026-01-11T22:29:51+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=go:stdlib:bytes&rev=1768170591&do=diff Go Stdlib Wiki: package bytes 1. Overview The Go standard library package bytes provides functions for working with byte slices ([]byte). It is like strings, but for raw bytes—useful for file/network data, buffers, and binary-safe operations. byte /baɪt/ = byte (đơn vị dữ liệu) text/html 2026-01-11T22:54:54+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=go:stdlib:compress_gzip&rev=1768172094&do=diff Go Stdlib Wiki: package compress/gzip 1. Overview compress/gzip provides gzip compression and decompression compatible with the gzip file format (RFC 1952). You typically use: gzip.Writer to compress (write compressed data) gzip.Reader to decompress (read compressed data) text/html 2026-01-08T22:27:45+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=go:stdlib:crypto_sha256&rev=1767911265&do=diff crypto/sha256 What is it? `crypto/sha256` provides the SHA-256 cryptographic hash function. What is it used for? * Generate a fixed-length digest (hash) from data. * Verify integrity (data has not changed). * Used in signatures, checksums, and many security protocols. text/html 2026-01-11T23:00:04+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=go:stdlib:database_sql&rev=1768172404&do=diff Go Stdlib Wiki: package database/sql 1. Overview database/sql provides a generic SQL database interface in Go. It does NOT talk to a database by itself. Instead, it works together with a database-specific driver (e.g., lib/pq for PostgreSQL, go-sql-driver/mysql for MySQL) that implements the low-level protocol. text/html 2026-01-11T22:48:34+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=go:stdlib:encoding_binary&rev=1768171714&do=diff Go Stdlib Wiki: package encoding/binary 1. What it is encoding/binary is a Go standard library package for encoding/decoding fixed-size numeric data (and structs made of fixed-size fields) to/from raw bytes—often used when you need a specific binary layout for files, network protocols, or hardware formats. text/html 2025-12-29T23:36:05+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=go:stdlib:http_client_struct&rev=1767051365&do=diff http.Client What is it? `http.Client` is Go’s HTTP client used to send requests and receive responses. It supports connection pooling and keep-alive by default. What is it used for? * Call external APIs (GET/POST/PUT/DELETE). * Set timeouts and transport options. text/html 2025-12-29T23:37:59+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=go:stdlib:http_client&rev=1767051479&do=diff HTTP Client (net/http) What is it? An HTTP client is code that sends HTTP requests to a server and reads HTTP responses back. In Go, the standard library package `net/http` provides: * helper functions like `http.Get`, `http.Post`, and * the configurable client type `http.Client`. text/html 2025-12-29T23:25:32+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=go:stdlib:http_server_listenandserve&rev=1767050732&do=diff http.ListenAndServe What is it? `http.ListenAndServe(addr, handler)` starts a basic HTTP server. * It listens on `addr` (for example `“:8080”`). * It serves requests using `handler`. * If `handler` is `nil`, it uses `http.DefaultServeMux`. text/html 2025-12-29T23:35:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=go:stdlib:http_server_struct&rev=1767051300&do=diff http.Server What is it? `http.Server` is the configurable HTTP server type in Go’s `net/http` package. It gives you more control than `http.ListenAndServe()` (timeouts, TLS, graceful shutdown, etc.). What is it used for? * Run an HTTP server with production-ready settings (timeouts). text/html 2025-12-29T23:33:06+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=go:stdlib:http_server&rev=1767051186&do=diff HTTP Server (net/http) What is it? An HTTP server is a program (service) that: * listens on an address (host:port), * accepts incoming HTTP connections/requests, * runs a handler to process each request, * writes an HTTP response (status + headers + body). text/html 2026-01-08T22:24:24+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=go:stdlib:math&rev=1767911064&do=diff math package What is it? `math` is Go’s standard library package for basic mathematical constants and functions (mostly for `float64`). What is it used for? * Common math functions: sqrt, pow, trig functions. * Math constants like Pi and E. text/html 2026-01-08T22:01:12+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=go:stdlib:net_dial&rev=1767909672&do=diff net.Dial (TCP client connection) What is it? `net.Dial(network, address)` initiates an outgoing connection to `address` using the named `network`. Common networks: * `“tcp”` * `“udp”` * `“unix”` (Unix domain sockets) What is it used for? text/html 2025-12-29T23:25:15+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=go:stdlib:net_http&rev=1767050715&do=diff HTTP Server (net/http) What is it? An HTTP server is a program that listens on a network address (host:port) and serves HTTP requests by calling a handler. In Go, the standard library package `net/http` provides everything you need to build a basic server. text/html 2026-01-08T22:31:40+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=go:stdlib:os_open&rev=1767911500&do=diff os.Open What is it? `os.Open(name)` opens the named file for reading and returns an `*os.File`. What is it used for? * Read file contents. * Work with file handles for streaming reads. Example f, err := os.Open("data.txt") if err != nil { return err } defer f.Close() b, err := io.ReadAll(f) if err != nil { return err } _ = b text/html 2026-01-08T23:49:38+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=go:stdlib:reading_writing_patterns&rev=1767916178&do=diff Reading/Writing patterns in Go: one-shot vs stream vs buffered Goal Help you choose the right approach when reading/writing data in Go: * One-shot (read/write all at once) * Stream (unbuffered) (read/write piece by piece) * Stream (buffered with bufio) text/html 2026-01-11T22:24:29+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=go:stdlib:strings&rev=1768170269&do=diff Go Stdlib Wiki: package strings 1. Overview The Go standard library package strings provides utilities for working with strings: checking prefixes/suffixes, searching, splitting/joining, trimming, replacing, case conversion, and more. string /strɪŋ/ = a sequence of characters (chuỗi ký tự) text/html 2026-01-08T22:03:51+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=go:stdlib:tcp_vs_http&rev=1767909831&do=diff TCP vs HTTP What is TCP? TCP (Transmission Control Protocol) is a transport-layer protocol. It provides a reliable, ordered byte-stream connection between two endpoints (client and server). TCP is like a pipe that carries bytes. What is HTTP? HTTP (Hypertext Transfer Protocol) text/html 2026-01-08T22:19:04+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=go:stdlib:time&rev=1767910744&do=diff time package What is it? `time` is Go’s standard library package for working with: * current time * durations * sleeping/timers * parsing and formatting dates/times * time zones and locations What is it used for? * Create timestamps for logs/events.