package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)(?<=[a-z])[A-Z]|[A-Z](?=[^A-Z])`)
var str = `'someWorkingTestingPhrase', 'shortMINEPasscode'`
var substitution = "_\g<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/