simple_grep_gz.rb

pattern = Regexp.new(ARGV[0])
filename = ARGV[1]


if /.gz$/ =~ filename
  file = IO.popen("gunzip -c #{filename}")
else
  file = File.open(filename)
end

file.each_line do |line|
  if pattern =~ line
    print line
  end
end


#filename = ARGV[0]
#open("|gunzip -c #{filename}") do |io|
#  io.each_line do |line|
#    print line
#  end
#end