From: Todd Burch <promos@...>
Date: 2007-05-11T02:41:16+09:00
Subject: Re: Trouble using string.tr()

Robert Klemme wrote:
> 
> The backslash is wrong there.
> 

Correct.  I thought it was.  I was grasping for straws.

Robert Klemme wrote:
> A more robust way to code this would be to use a HashMap - at least to
> initially associate ASCII with EBCDIC chars.  So, I'd rather to
> 
> CHAR_MAP = {
>    0XC1 => ?A,
>    0xC2 => ?B,
> # ...
> }
> 
> Then you can do:
> 
> ebcdic, ascii = [CHAR_MAP.keys, CHAR_MAP.values].map do |set|
>    set.inject("") {|st, ch| st << ch}
> end
> 

Good suggestion.  I haven't used HASHes at all.    However (and maybe I 
don't understand the exampe), but I added this to the very bottom of my 
script:

char_map = {
  0XC1 => ?A ,
  0XC2 => ?B,
  0XC3 => ?C,
  0XC4 => ?D,
  0X6E => ?>,
  0XF1 => ?1,
  0XF2 => ?2,
  0XF3 => ?3,
  0XF4 => ?4
}


ebcdic, ascii = [char_map.keys, char_map.values].map do |set|
   set.inject(instring) {|st, ch| st << ch}
end

puts "ebcdic = #{ebcdic}" ;
puts "ascii  = #{ascii}" ;
puts "instring = #{instring}" ;


and it produced some REALLY weird data.   What did I do wrong?

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