split a string into a slice of strings by regexp (goで正規表現を使って文字列を分割する)

splitByRegexp.go

func splitByRegexp(str string, separator string) []string {
    normalRe := "[^%s]*[%s]"
    rawRe := `[^%s]*[%s]`

    var re *regexp.Regexp
    if strings.Index(separator, `\\`) > -1 {
        re = regexp.MustCompile(fmt.Sprintf(normalRe, separator, separator))
    } else {
        re = regexp.MustCompile(fmt.Sprintf(rawRe, separator, separator))
    }
    strSlice := re.FindAllString(str, -1)

    if strSlice == nil {
        return []string{str}
    }

    // 元の文字列から最後の部分を取り出す
    restStr := strings.Replace(str, strings.Join(strSlice, ""), "", -1)
    if restStr != "" {
        strSlice = append(strSlice, restStr)
    }

    return strSlice
}

How to use:

strSlice := splitByRegexp("Lorem, ipsum. dolor", "\.,")

=> ["Lorem", "ipsum", "dolor"]