Array to table format

gistfile1.rb

class Array
  def to_table_format
    return self unless self.grep(/\${image\d+}/).empty?

    cached_max = {}

    unless self[0].class == Array
      cached_max[0] = self.map(&:size).max
    else
      self[0].size.times.each do |i|
        cached_max.merge!(i => self.map{|a| a[i]}.map(&:size).max)
      end
    end

    to_do = lambda do |obj, index| 
      ((obj == "\n") || (obj == "(  )")) ? obj : (obj + ("-" * (cached_max[index] - obj.size)))
    end

    self.map{|a| a.is_a?(Array) ? a.each_with_index.map{|a, i| to_do.call(a, i)} : to_do.call(a, 0)}
  end
end

a = [["aaaaa", "dsdsdsdsd", "A", "xxxxxx"], ["xxx", "dsdsddsdsdsdsdsdsdsdsd", "B", "s"]]
#a = ["aaa", "vvvvv", "ccccc"]
puts a.to_table_format