Go Snippets: hashing strings with SHA256 algorithm

hash_sha256.go

package main

import (
	"bytes"
	"crypto/sha256"
	"encoding/hex"
	"fmt"
)

// Go Playground https://go.dev/play/p/1EaM_5NQmc5

func main() {
	fmt.Println("There are limitations to the programs that can be run in the playground")
	fmt.Println(HashSHA256([]string{"There are limitations to the programs that can be run in the playground"}))

	ss := []string{
		"The playground can use most of the standard library, with some exceptions. The only communication a playground program has to the outside world is by writing to standard output and standard error.",
		"In the playground the time begins at 2009-11-10 23:00:00 UTC (determining the significance of this date is an exercise for the reader). This makes it easier to cache programs by giving them deterministic output.",
		"There are also limits on execution time and on CPU and memory usage.",
	}
	fmt.Println(ss)
	fmt.Println(HashSHA256(ss))
}

func HashSHA256(ss []string) string {
	var sb bytes.Buffer
	for _, s := range ss {
		sb.WriteString(s)
	}
	b := sb.Bytes()
	sum := sha256.Sum256(b)
	return hex.EncodeToString(sum[:])
}