From: Phrogz <gavin@...>
Date: 2007-03-26T13:55:06+09:00
Subject: Re: how to tranlsate number to binary?

On Mar 25, 10:06 pm, Joel VanderWerf <v...@path.berkeley.edu> wrote:
> Ak 756 wrote:
> > I want my function to give output 100100000011 for input 903. Where
> > '1001','0000','0011' is the binary value for 9,0,3
> > Is there efficient way to do this?
>
> "903".split("").map{|s| "%04b" % s.to_i}.join
> => "100100000011"

No need to call to_i on the digit strings:

irb(main):002:0> 903.to_s.split('').map{|n| "%04b" % n }.to_s
=> "100100000011"