so go to a repl and run (doc first)
hmm wait, I misunderstood. Let me look for a minute.
ok so that looks like it's a sequence? make it a vector and it should work
I'm not claiming that it shouldn't work as a seq, but as a vector it does in my repl
ok, as a seq it does work for me so I'm not sure why it's not working for you. I would take a look at what (first (first items))
returns.
@dmbennett: also ideally you would mung your data such that it wasn't a vec of one item vecs to reduce the odds that something goes wrong between the first and second first
calls