我只是盡力完成這個測驗,但我不明白是什麼做的是,在「使羅馬」方法「AMT」:這個羅馬數字練習中「amt」的含義是什麼?
ROMAN_NUMS = {
"M" => 1000,
"CM" => 900, "D" => 500, "CD" => 400, "C" => 100,
"XC" => 90, "L" => 50, "XL" => 40, "X" => 10,
"IX" => 9, "V" => 5, "IV" => 4, "I" => 1
}
def romanize(num)
ROMAN_NUMS.map do |ltr, val|
amt, num = num.divmod(val)
ltr * amt
end.join
end
[divmod](http://ruby-doc.org/core-1.9.3/Numeric.html#method-i-divmod) – zarak
如果有疑問,搜索方法名稱,如「Ruby divmod」,並開明。 – tadman
http://ruby-doc.org/core-1.9.3/Numeric.html#method-i-divmod – HolyMoly