class Prawn::Table::Cell

def border_line=(line)


* a four-element array [top, right, bottom, left]
* a three-element array [top, horizontal, bottom]
* a two-element array [vertical, horizontal]
* one value (sets all lines)

Possible values are: :solid, :dashed, :dotted

Sets border line style on this cell. The argument can be one of: 
def border_line=(line)
  @border_lines = case
  when line.nil?
    [:solid] * 4
  when line.length == 1 # all lines
    [line[0]] * 4
  when line.length == 2
    [line[0], line[1], line[0], line[1]]
  when line.length == 3
    [line[0], line[1], line[2], line[1]]
  when line.length == 4
    [line[0], line[1], line[2], line[3]]
  else
    raise ArgumentError, "border_line must be one of :solid, :dashed, "
      ":dotted or an array [v,h] or [t,r,b,l]"
  end
end