Rails, helper not outputting results of a loop

I trying to render a table which values for each hour of everyday of the week, I'm actually using this jquery plugin to color the chart, but the data should be output to match the one on their site here: http://www.geertdedeckere.be/shop/graphup/download/demo1/

My data is being output by rails like this:

@data = [
  {"day"=>1.0, "hour"=>19.0, "count"=>6623.0},
  {"day"=>1.0, "hour"=>20.0, "count"=>7242.0},
  {"day"=>1.0, "hour"=>21.0, "count"=>7148.0},
  {"day"=>1.0, "hour"=>22.0, "count"=>7196.0},
  {"day"=>1.0, "hour"=>23.0, "count"=>7244.0},
  {"day"=>2.0, "hour"=>0.0, "count"=>7147.0},
  {"day"=>2.0, "hour"=>1.0, "count"=>7217.0}
  # ...
]

And my helper looks like the following, and this is where the problem lies

def table_counts(data)
  days = 1..开发者_Python百科7
  hours = 0..23

  hours.each do |hour|
    content_tag(:td, hour)

    day_of_week = data.select {|f| f["hour"] == hour }
    day_of_week.each do |d|
      content_tag(:td, d['count']) 
    end
  end
end

So the major issue is in my views I don't get the content_tags I just get the value of hours, so the output to the html is literally 0..23, How can I have all those tds output via my helper?

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each returns the collection iterated over. You want map. map returns an array that you will then want to join.