package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)^([0-9]{1,3}|[0-9]{1,3}\.[0-9]{1,3}|[0-9]{1,3}\.[0-9]{3}\.[0-9]{1,3})$`)
var str = `Valid
123
123.4
123.44
123.445
123.333.3
123.333.34
123.333.344
Not Valid
123.33.3
123.3.3`
for i, match := range re.FindAllString(str, -1) {
fmt.Println(match, "found at index", i)
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Golang, please visit: https://golang.org/pkg/regexp/