package slice

// All takes a string 'str' and a length 'l' and returns
// all substrings of length l
func All(l int, str string) []string {
	var ret []string
	for len(str) >= l {
		ret = append(ret, str[:l])
		str = str[1:]
	}
	return ret
}

// Frist (Frist?!) takes a string 'str' and a length 'l' and returns
// the first substring of length l
func Frist(l int, str string) string {
	if len(str) >= l {
		return str[:l]
	}
	return ""
}