OK. I got some super guidance from p-himik on the Slack channel (Thank
you!).
Essentially there was a TreeSet in one of the sets to be conj'ed and that
was causing the exception. Apparently, it's not a trivial matter to conj
tree-sets :-).
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I'm stumped on this. I have a function that returns a lazy sequence (let's call
it lzs - it's produced by another function, and for this exercise I def'd it
in the REPL from `*1'). It's a sequence of maps.
When I apply a merge-with operation to the lazy sequence. I get the following
error.
c
ebruary 15, 2019 at 9:32:02 AM UTC-5, Alex Miller wrote:
>
> What's the stack trace when you get an NPE? (pst *e)
>
> Are you shadowing a core function with your own `count` or something like
> that?
>
> On Friday, February 15, 2019 at 8:27:55 AM UTC-6, KJO wrote:
>
Hi-
This one has me stumped. The following code snippet throws a
NullPointerException and I just can't understand how it could.
(if (set? t-val)
(println t-val (type t-val)))
It seems that if it's a set, it should have a set type.
If I change the code to
(if (set? t-val)
(println t-val (
