Thanks, now this ok.

irb(main):001:0> a = [ 8412478247689, 25977, 88582, 8410347003107 ]
=> [8412478247689, 25977, 88582, 8410347003107]
irb(main):002:0> a.sort
=> [25977, 88582, 8410347003107, 8412478247689]
irb(main):003:0>


In my code with "to_i" it's ok:

@f.each do |linea|
      cod, desc = linea.chomp.split(/,/)
      @array1[i] = [ cod.strip.to_i ]
      i = i+1
end
@asort1 = @array1.sort

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