ISBN-10 in GO

Match 10-digit ISBNs, allowing optional hyphens or spaces between groups.

Pattern

\b(?:\d[\- ]?){9}[\dXx]\b   (flags: g)

Go (RE2) code

package main

import (
	"fmt"
	"regexp"
)

func main() {
	re := regexp.MustCompile(`\b(?:\d[\- ]?){9}[\dXx]\b`)
	input := `0-306-40615-2`
	for _, match := range re.FindAllString(input, -1) {
		fmt.Println(match)
	}
}

Uses `regexp.MustCompile` (panics on bad patterns at startup) and `FindAllString` for all matches.

How the pattern works

Examples

Same pattern, other engines