package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)(\d*)( *)(x|\*)`)
var str = `500 g (4 x 125 g)
1,8 kg (20 * 90 g)
380 g (2 x 190 g)
1,6 kg (16 x 100 g)
1,6 kg (226x100 g)
8 x 100 g
2 l`
var substitution = "$0"
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/