From: Tony Sloane <asloane@...>
Date: 2002-10-08T09:36:13+09:00
Subject: Problem with pack and Hh format specifiers

Hi,

I'm relatively new to Ruby so perhaps I'm missing something, but I can't
get Array's pack to work in the following situation:

irb(main):001:0> "%08b" % ["4","7"].pack ('HXh')[0]
"00000111"

I'm expecting to see "01000111".

Note that unpack seems to work the way I would expect.  (ASCII code for
'G' is 01000111.)

irb(main):002:0> "G".unpack ('HXh')
["4", "7"]

Can anyone shed any light on this?

I'm using Ruby 1.6.7 on a (mostly) Debian Woody linux system.

Thanks in advance,

Tony Sloane

Dept of Computing
Macquarie University