From: "G.Durga Prasad" <gdprasad@...>
Date: 2007-03-26T21:17:25+09:00
Subject: Re: how to tranlsate number to binary?

On 3/26/07, _why <why@ruby-lang.org> wrote:
> On Mon, Mar 26, 2007 at 10:26:35AM +0900, Ak 756 wrote:
> > For example, for input.txt as
> >
> > 903
> > 1047
> >
> > I will get a new file as
> >
> > 100100000011
> > 0001000001000111
> >
>
>   >> 0x903.to_s(2)
>   => "100100000011"
>   >> 0x1047.to_s(2)
>   => "1000001000111"
>
> And so it was:
>
>   puts IO.read('input.txt').map { |x| x.to_i(16).to_s(2) }.join
>
> _why
>
>

>> format("%0#{"193".length*4}b", 0x193)
=> "000110010011"
     to get leading zeros.

And so , the following
puts IO.read('input.txt').map { |x|
format("%0#{x.chomp.length*4}b",x.to_i(16)) }.join("\n")

Prasad