package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?<=\d)(?=(\d{3})+(?!\d))`)
var str = `2244511556654445454454566436`
var substitution = " "
fmt.Println(re.ReplaceAllString(str, substitution))
}
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/