Morse code codewars kata

morse_code.rs

// Preloaded:
//
// struct MorseDecoder {
//     morse_code: HashMap<String, String>,
// }
//
// MorseDecoder::new() populates the morse_code map, e.g. ".-" -> "A".

impl MorseDecoder {

    fn decode_morse(&self, encoded: &str) -> String {
        let ref morse_code = self.morse_code;
        println!("{:?}", morse_code);
        println!("{:?}", &&morse_code.get("asdfdsaf").unwrap_or("trying to do unwrap_or"));

        encoded.split("  ").map(|word: &str| -> String {
            word.split(" ").map(|letter: &str| -> String {
                println!("{}", letter);
                morse_code.get(letter).unwrap().to_owned()
            }).collect::<Vec<_>>().join("")
        }).collect::<Vec<_>>().join(" ")
    }
    
}