From: John Maclean <john@...>
Date: 2008-02-12T09:04:37+09:00
Subject: Ruby one liner killed my script

Talk about redundancy!

I spent some time with irb with the aim of getting an understanding of
methods and class building. I originally wanted to convert a binary
number to denary, with input from the user. 

# strike one! 
ruby -e 'p 0b10010101111' 
does it on one line.

Anyway, I still looked at the few lines that I had and I'm wondering
how I can convert a user's input into a fixnum?


class B2d
  def initialize
    @ustring = " "
  end

  def get_bin_string
    p 'binary numbers : '
    @ustring = gets.chomp
  end

   def test_bin_string
     if @ustring =~ /[a-z]|[2-9]|[A-Z]| /
       p  "binary digits only and no spaces, please!"
       exit 1
     end
   end

  def put_bin_string
# this is the line in which I originally tried to convert the user's
binary digit to denary puts "your bin #{@ustring.to_i} =
0b#{@ustring.to_i}" end
end

t = B2d.new
t.get_bin_string
t.test_bin_string
t.put_bin_string


-- 

Regards,

John Maclean


-- 

Regards,

John Maclean
MSc (DIC)
+44 7739 171 531