reverse-complement Matz's Ruby #5 program

# The Computer Language Benchmarks Game
# http://benchmarksgame.alioth.debian.org
#
# Contributed by Aaron Tavistock

LEADER = ">".freeze
CR = "\n".freeze

STDIN.each_line(LEADER).lazy.each do |chunk|
  header, segment = chunk.split(CR, 2)
  next unless segment

  segment.delete!(CR+LEADER)
  segment.reverse!.tr!('wsatugcyrkmbdhvnATUGCYRKMBDHVN','WSTAACGRYMKVHDBNTAACGRYMKVHDBN')

  STDOUT.write LEADER, header, CR
  segment_size = segment.size
  idx=0
  while idx < segment_size do
    STDOUT.write segment.byteslice(idx,60), CR
    idx += 60
  end
end
    

NOTES:
64-bit Ubuntu quad core
ruby 1.8.7 (2008-08-11 patchlevel 72) [x86_64-linux]
 
So old that I haven't been able to get rubygems to work
no backport, no gmp


Sun, 02 Jun 2019 06:27:03 GMT

COMMAND LINE:
/usr/bin/ruby revcomp.mri-5.mri 0 < revcomp-input250000.txt

PROGRAM FAILED 


PROGRAM OUTPUT:

revcomp.mri-5.mri:9: undefined method `lazy' for #<Enumerable::Enumerator:0x7f758322f7b8> (NoMethodError)