Ruby on Rails

Hi
I have an attribute decimal => hour

If I do

hours.each do |h|
      h.my_hour
end
I get => 20.0 0.0 0.0 10.0

And this..
myhour = []
hours.each do |h|
myhour << hour
end
myhour.join(",")

I get =>
<Hour:0x007f81feec3330>,#<Hour:0x007f81feaa0c30>,

How do I get something like this ?
20.0, 0.0, 0.0, 10.0

Thanks for support

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