package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)^(?!\.)((^|\.)([1-9]?\d|1\d\d|2(5[0-5]|[0-4]\d))){4}$`)
var str = `115.42.150.37
192.168.0.1
110.234.52.124
01.01.01.01
1.1.1.01
123123123213
210.110
255
y.y.y.y
255.0.0.y
666.10.10.20
4444.11.11.11
33.3333.33.3
365.1.1.1
123.123.123.123.123
.123.123.123.123
123.123.123.123.
1.2.3.256
1.2.260.1
1.333.1.1
`
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/