From: William James <w_a_x_man@...>
Date: 2008-02-15T02:09:57+09:00
Subject: Re: my noob "numbering lines" programe. How to improve?

On Feb 13, 4:50 pm, Adam Akhtar <adamtempor...@gmail.com> wrote:
> Give us hints on how to improve this program. If you want to show your
> code off then go ahead but please give us the hints first i.e. what
> methods you would use, what you would rewrite in my code etc. Its so
> much better for me to go away and try and replicate your thinking than
> just reading it.
>
> heres my version
>
> #program to insert numbers infront of lines.
> def numbertext(infilename, outfilename)
>   #for neat formating work out how many lines there are first so we know
> how       #many digits to set ljust to
>   totalnumlines = File.readlines(infilename).length
>   numdigits = 1
>   x = 1
>   while (x < totalnumlines)
>     x = x * 10
>     numdigits = numdigits + 1
>   end
>
>   linenumber = 0
>   File.open(outfilename, "w") do |output|
>     File.foreach(infilename) do |input|
>       output.write linenumber.to_s.rjust(numdigits) + " " + input
>       linenumber = linenumber + 1
>     end
>   end
> end
> --
> Posted viahttp://www.ruby-forum.com/.

a = IO.readlines('data')
puts (1..a.size).map{|x| x.to_s.rjust(a.size.to_s.size)}.zip(a).
  map{|x| x.join ' '}