modArr    = Array.new
freq        = Array.new([ [0] ])
values     = Array.new([ [] ])


#--------------Open the output file and process each line-----
File.open('output.txt', 'r').each { |x|

#-------------Create unique keys according to |x|---------------
    #--Calculate the modulus ([add each digit]%10) and use it as hash
key--
    key = 0; modF = x.each_byte { |y| key += y.chr.to_i }
    #--For slight optimization, change the resulting key into a symbol
    mod = (key%100).to_s.intern


      #--If the key D.N.E. then add it into modArr

      if(!modArr.include?(mod))

        #--Add the value
        values[modArr.size][0] = x.chomp


        #--Add the frequency
        freq[modArr.size][0] += 1


        #--Add the mod
        modArr[modArr.size] = mod


        end

}


Hi, I'm still trying to work on the same problem that I posted a few
days ago... when i run this program, this error reads:

BLANK.rb:22: undefined method `[]=' for nil:NilClass (NoMethodError)
  from BLANK.rb:7:in `each'
  from BLANK.rb:7


Why is this? And how do I fix it??

Thanks in advance!!!!!
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