test.rb

#!/usr/bin/ruby

def mymethod my_passed_parameter
        open("/tmp/#{my_passed_parameter}", 'w') { |f| f.puts my_passed_parameter }
end



array1 = [ 1, 2, 3, 4 ]
array2 = [ 5, 6, 7, 8 ]
array3 = [ 9, 10, 11, 12 ]
myarraynames = [ array1, array2, array3 ]

myarraynames.each { |myparam| mymethod myparam }