how can i find the common symbol from two lists?

nnneuromodulator's icon

I need to find the single common element in two different lists and output this element. I don't see a way to do this with an existing object, and I don't know anything about scripting. Am I missing an obvious solution, or is someone willing to help me with the script?

Much obliged...

Jean-Michel Darremont's icon
pdelges's icon
Peiman's icon
robin's icon

lobjects is the single most amazingly useful externals library ever