grep.rb

def filter(file_name, re_filter)
	File.open(file_name) do |f|
		f.each_line.with_index {|line, i| yield line, i if line =~ re_filter}
	end
end


#re_filter = /HTTP-404/
re_filter = /ora-03113/i
filter('logs/error_log.1271160000', re_filter) do |line, i|
	puts "#{i}: #{line}"
end