package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`\b0*1(?=0+~)|\b0+|([0-9])(?=0*~[0-9]*?\1([0-9]))|~[0-9]*`)
var str = `000~09876543210
0001~09876543210
1~09876543210
2~09876543210
3~09876543210
004~09876543210
10~09876543210
0010~09876543210
0020~09876543210
210~09876543210
438~09876543210
1000~09876543210`
var substitution = "$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/