package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?=(\d{1,3}\.){3}\d{1,3})((?:(2[0-5]{2}|[1]?\d{1,2}))\.){3}(?:(2[0-5]{2}|[1]?\d{1,2}))(?![\.\d])`)
var str = `1.2.3.4 255.100.196.123 256.100.203.1 1.2.3.4 1.2.3.4.5 123.456.78.90 123.45.67.89
`
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/