package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)^(.{10}).*$`)
var str = `Mary had a little lamb,
little lamb, little lamb.
Mary had a little lamb, its fleece was white as snow.
And everywhere that Mary went,
Mary went, Mary went,
and everywhere that Mary went, the lamb was sure to go.`
var substitution = "$1"
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/