Golang fat %x strips leading 0

gohex.go

// hex formater with %x can lose a leading 0
// This can produce strings with an odd number of hex digits

package main

import (
	"encoding/binary"
	"encoding/hex"
	"fmt"
)

func main() {
	var foo uint16 = 0x0ABC // decimal 2748

	with_pct := fmt.Sprintf("%x", foo)
	fmt.Printf("With string formatter: %q\n", with_pct)
	// Outputs: With string formatter: "abc"

	// I hope there is a cleaner way to get an integer into a []byte
	foo_bytes := make([]byte, 2)
	binary.BigEndian.PutUint16(foo_bytes, foo)

	with_bytes := hex.EncodeToString(foo_bytes)
	fmt.Printf("With hex encoding: %q\n", with_bytes)
	// Outputs: With hex encoding: "0abc"
}

// Play with this in Go playground: https://go.dev/play/p/tpmlYfq7NYF