I was trying to combine 2 maps into a new map, as you can see here. I
printed both maps to the screen so I could see that, indeed, they were both
maps. And yet I got a NullPointerException on the last line here:
(defn update-config
[more-config]
(swap! config-holder
(fn [old-config]
(let [default-config (if old-config old-config {})]
(println "default-config ")
(clojure.pprint/pprint default-config)
(println "more-config")
(clojure.pprint/pprint more-config)
(into {} default-config more-config)))))
I took the last line and changed it so I only had the second map merging
with the first map:
(into default-config more-config)
This seems to fix the problem.
Perhaps I have "into" and "merge" confused. What was I doing wrong?
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