From: piir@... (Todd Gardner)
Date: 2004-06-21T09:48:15+09:00
Subject: Re: Convert binary to decimal and hex numbers

Tim Bates <tim@bates.id.au> wrote in message news:<40D42FA6.5000001@bates.id.au>...
> Todd Gardner wrote:
> > Even more generic, would be a way to convert base n to base m.
> > 
> > Where can I go to find how to do this with one single method call?
> 
> When you're dealing with numbers internally to Ruby, it doesn't matter 
> at all what base you use.
>    myvar += 0x0a
> is exactly equivalent to
>    myvar += 10
> The only time it makes any difference is when you're reading them in or 
> printing them out, so what you really want is a way to convert String 
> representations in different bases to Fixnums and vice versa. Thus, the 
> methods you're looking for are
>    String#to_i(base=10)
> and
>    Fixnum#to_s(base=10)
> 
> For example:
> irb(main):001:0> "10".to_i
> => 10
> irb(main):002:0> "10".to_i(16)
> => 16
> irb(main):003:0> "10".to_i(2)
> => 2
> irb(main):004:0> 10101.to_s
> => "10101"
> irb(main):005:0> 10101.to_s(2)
> => "10011101110101"
> irb(main):006:0> 10101.to_s(16)
> => "2775"
> irb(main):007:0> 10101.to_s(27)
> => "dn3"
> 
> Tim.

Hello Tim,

Thanks for showing me that!  I think I've got it now.

Todd