我只是尽力完成这个测验,但我不明白是什么做的是,在“使罗马”方法“AMT”:这个罗马数字练习中“amt”的含义是什么?
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
如果有疑问,搜索方法名称,如“Ruby divmod”,并开明。 – tadman
http://ruby-doc.org/core-1.9.3/Numeric.html#method-i-divmod – HolyMoly