How to count duplicates hash itens in Ruby 1.8.5 ( Sketchup Ruby API )
I need to count the duplicates, they need to be 100% identical to increase my count, but I can not use a nothing out of Ruby 1.8.5, this code will run inside a plugin in google sketchup Google Sketchup Ruby API puts VERSION 1.8.5 puts RUBY_PLATFORM i686-darwin8.10.1 product = 'Glass' x = width y = length z = density product_list = [ { "product" => 1, "x" => 200, "y" => 100, "z" => 18}, { "product" => 1, "x" => 200, "y" => 100, "z" => 18}, { "product" => 1, "x" => 300, "y" => 100, "z" => 18}, { "product" => 2, "x" => 300, "y" => 100, "z" => 18}, { "product" => 2, "x" => 100, "y" => 100, "z" =>