Animation Nodes Flow Controll? In comparrison with Unreal Blueprints i felt the need of Flow Controll in Animation Nodes, like gate. Is there another way then routing - for example - the transformation to an empty like in my example?  

To compare Blueprints and AN is a bit off but i need the functionality to work with huge numbers of categorised objects. expl.: all chairs to height 1, all shelfes to height 2.
Given the list of objects, their classes (0, 1, 2), and sizes of each class. We can evaluate the sizes list at the classes list and use the output as the scale as follows: