Ruby on Rails

Hi,

Novice question:

I need to assign an item id to one of 3 arrays randomly but can't figure
out how to specify the correct array by combining "arr" and the randomly
generated number...

id = "100"
x = rand(1..3)

arr1 = Array.new
arr2 = Array.new
arr3 = Array.new

selected_array = "#{'arr' + x}" *** Not sure how to do this ****

selected_array.push(id)

Thanks in advance,

Dave Castellano

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