ID:157715
 
I'm wondering if it's possible to do something where you can have it return the number of same things in a list?

I'm trying to use it to see if there are multiples of the same object in a contents list.
That would not be multiples of something in a list, as they would not be identical objects. Aside from that, you can just use a for() loop to count them:

var/list/found = list()
for(var/obj/whatever/O in contents)
found += O
usr << "Found [found.len]"