紅寶石莫爾斯解碼器

-1

我試圖創建一個莫爾斯解碼器。它用他們的莫爾斯電碼代替拉丁字母。字母之間有一個空格，單詞之間有三個空格。紅寶石莫爾斯解碼器

def decodeMorse(morseCode) 
morse_dict = { 
    "a" => ".-","b" => "-...","c" => "-.-.","d" => "-..","e" => ".","f" => "..-.","g" => "--.","h" => "....","i" => "..","j" => ".---","k" => "-.-","l" => ".-..","m" => "--","n" => "-.","o" => "---","p" => ".--.","q" => "--.-","r" => ".-.","s" => "...","t" => "-","u" => "..-","v" => "...-","w" => ".--","x" => "-..-","y" => "-.--","z" => "--.."," " => " ","1" => ".----","2" => "..---","3" => "...--","4" => "....-","5" => ".....","6" => "-....","7" => "--...","8" => "---..","9" => "----.","0" => "-----" 
} 

wordList = morseCode.split(" ") 

wordList.each do |word| 
    word = word.downcase 
    word.split("").each do |letter| 
    a = ' ' + morse_dict[letter].to_s + ' ' 
    word.gsub! letter a 
    end 
end 

sentence = wordList.join(' ') 

return sentence.lstrip 

end 

puts decodeMorse("Example from description")

然後我得到這個錯誤：

NoMethodError: undefined method `letter' for main:Object 
    from codewars.rb:12:in `block (2 levels) in decodeMorse' 
    from codewars.rb:10:in `each' 
    from codewars.rb:10:in `block in decodeMorse' 
    from codewars.rb:8:in `each' 
    from codewars.rb:8:in `decodeMorse'

有什麼不對？

來源

2016-10-18 Ethem GÜR

'word.gsub！（letter，a）'？（只是猜測參數沒有正確解釋沒有括號，但可能是錯誤的） – Tensibai

的問題是在這裏：

word.gsub! letter a

它正在從右邊解釋到左邊，因爲沒有逗號letter和a之間它被視爲letter(a)函數調用。你想同時letter和a被作爲參數傳遞給函數調用⇒將它們分開用逗號：

#    ⇓ HERE 
word.gsub! letter, a

BTW，gsub可能採取的哈希作爲第二參數去做出換人：

word.gsub(/./, morse_dict)

會將所有字母更改爲其莫爾斯表示。要處理空間，可能需要使用gsub，它需要一個塊：

word.gsub(/./) { |l| " #{morse_dict[l]} " }.squeeze(' ')

來源

2016-10-18 09:10:28 mudasobwa

謝謝，錯誤消息消失了，但我無法得到我期望的輸出。 –

輸出：「來自說明的示例」它給了我確切的輸入。 –

我沒有按照你的代碼，問題是「這個錯誤的原因是什麼」，我已經回答了。 – mudasobwa

紅寶石莫爾斯解碼器

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