From: Luc Evers <lucevers@...>
Date: 2007-11-20T23:51:56+09:00
Subject: Array object but to_a is needed to access data


 Hi,

 Below a progam (test version) that shall analyse syslog messages.
 The program works fine but I don't understand why to_a is needed.
(filter.hash[:action].to_a[0])

 filter.hash[:action].class -> answer array
 filter.hash[:action][0]    -> don't work
 filter.hash[:action].to_a[0] -> ok


---------------------------------------------------------------------

module State
 attr_reader :hash, :action

 def initialize
   @hash = Hash.new
   @action = Array.new
 end

 def chkurg(line)
    case line
     when /%FAN-3-FAN_FAILED/
         @action << 'urgent' << 'mail' << 'sms'
         @hash[:alarm] = 'testurgent'
         @hash[:action] = @action
      #   @hash =  { :alarm  => 'urgent',
      #              :action => @action }
     when /CONTROLLER-2-FIRMWARE/
         action << 'urgent' << 'mail' << 'sms'
         @hash =  { :alarm  => 'urgent',
                    :action => @action }
     else
         "noState"
    endclass Filter
    include State
end


class Filter
    include State
end



filter = Filter.new()
filename = ARGV.pop or fail "Usage: #$0 number filename"
number = (ARGV.pop || 0).to_i.abs

File::Tail::Logfile.open(filename) do |log|
  log.backward(number).tail { |line|
  filter.hash.clear
  filter.action.clear
  filter.chkurg(line)
   case filter.hash[:alarm]
     when 'testurgent'
        puts filter.hash[:action].to_a[0]
        puts "urgent: #{line}"
     when 'reject'
       puts "reject: #{line}"
       next
     else
       puts "mail: #{line}"
   end
  }
end

 end
end
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