From: Gerr <gerald@...>
Date: 2006-07-18T04:50:04+09:00
Subject: Re: First ruby code, need hint on iterator

Sander Land <sander.land@gmail.com> wrote:
> On 7/17/06, Gerr <gerald@frobble.com> wrote:
>> Hello,
>>
>> Consider the following code which generates a hexdump of a string:
>> ...
>> What would be the idiomatic solution for this in Ruby ? Any other comments on
>> the code are welcome as well, ofcourse
> 
> If you want to do things with 16 bytes at a time, you might as well
> process them in groups of 16:
> 
> require 'enumerator'
> module Dump
>  def hexdump
>    offset = 0
>    out = ''
>    split('').each_slice(16) {|chars|
>          hc = chars.map{|c| "%02x " % c[0] }
>          hex = hc[0..7] << '- ' << hc[8..15]
>          str = chars.map{|c| (c[0] >= 32 && c[0] <= 127) ? c : "." }
>          out << sprintf("%08x: %-50s %s\n", offset, hex, str)
>          offset += 16
>        }
>        return out;
>  end
> end

Delightful ! It's hard to think outside the box if you mainly have been
programming C for 20 years...

Thank you very much, I will learn a *lot* from this newsgroup, I'm sure
:)