gistfile1.rb

class DBEvent
  attr_accessor :ref, :o_events, :sp

  def initialize(sp, events)
    @sp         = sp
    @ref        = events.split('/')[0]
    @raw_events = events
    @o_events   = Hash.new(Array.new) # Observed events

    # Iterate over each observed event
    # So AC/AT (start pos of the event = X) becomes:
    # @o_events[X]   = [ 'A' ]
    # @o_events[X+1] = [ 'C', 'T' ]
    each_v_event do |e|
      snps = e.split('')
      (0..snps.size-1).each {|p| @o_events[sp+p] << snps[p] }
    end
    # even this does not work
    #@o_events[1] << "asdasf"
  end

  private

  def s_var_events
    @raw_events.split('/')[1]
  end

  def each_v_event
    s_var_events.split('/').each {|e| yield(e) }
  end
end

class DBEntry
  attr_accessor :id, :chrm, :sp, :ep, :events

  def initialize(args)
    @id, @chrm, @sp, @ep = args[0, args.size-1]
    @events = DBEvent.new(@sp.to_i, args[-1])
  end
end

# inputs lines look like:
# rs242,chr1,20742048,20742048,+,-/T,in-del,byFrequency,0.18,unknown
entries = []
File.open("/tmp/input.txt").each_line do |l|
  puts l
  entries << DBEntry.new(l.split(",")[0,6])
end

puts entries[0].events.o_events.size