package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)(?:(?<=^|[^\d.])(\d{1,3})(?=(?:\d{3})+(?:\D|$))|\G)(\d{3})`)
var str = `1 10 100 1000
10000
1000.23
10032323232320.12323232`
var substitution = "$1,$2"
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/