From: George George <george.githinji@...>
Date: 2009-06-19T16:11:03+09:00
Subject: Re: formatting a listing



Thanks a lot Pascal! The code is working though a little complex but a 
very nice learning piece of code. one nitty gritty thing is that not all 
the columns are seperated by a comma. for example your code

File.open("/home/george/test_r.csv",'w') do |f|
printf "%s\n\n",
 begin
    matrix = Array.new
    ncols = 1
    matrix.push(Array.new)
    (IO.readlines '/home/george/test.data').
      map { | line | (line.strip) }.
     each { | item | if item == ""
                        ncols = (ncols + 1)
                        matrix.push(Array.new)
                      else
                        matrix.at(ncols - 1).push item
                      end
     }

    height = (matrix.map { | column | (column.size) }).max

    widths = matrix.map { | column | ((column.map { | cell |
((sprintf("%s" , cell)).size) }).max) }

  f.puts((matrix.map { | column | (column + (Array.new((height - 
column.size) , ""))) }).transpose.
      map { | row | ((([ row , widths ].transpose).
      map { | r , w | (sprintf( "%*s" , w , r)) }).join ",")}.join "\n")
end
  end

when given  a file(test.data)  containing
1 2
2 4

1 4
2 3

1 3
2 3
3 5
4 6

it produces (test_r.csv)

1 2,1 4,1 3
2 4,2 3,2 3
   ,   ,3 5
   ,   ,4 6

which is almost there!
the ideal output would have been

1, 2,1, 4,1, 3
2, 4,2, 3,2, 3
 ,  ,   ,3, 5
 ,  ,   ,4, 6

Sorry am asking for a horse and the saddle :) what little modification 
should i do to produce the second output?
Thank you so much!

George
-- 
Posted via http://www.ruby-forum.com/.