I'm trying to learn a bit about Clojure and it's concurrency features but
I've hit an issue at an early point, where the same program exhibits
different behavior if run within the REPL or from a regular file. This is
the code I'm running:
(def foo (atom 0))
(pmap
(fn [_] (swap! foo inc))
(range 10000))
(println @foo)
When I run this inside the REPL, the (pmap ...) returns the whole sequence
with 10000 elements and the last line prints "10000", as expected. But when
I put this code in a file and run it as one of
java -cp clojure-1.4.0.jar clojure.main swap.clj
java -jar clojure-1.4.0-slim.jar swap.clj
then it will output "32" and the program won't terminate, I have to hit
CTRL+C to get control back to the console. Am I doing something wrong here?
I'm running Clojure 1.4.0 with Java 1.6.0_21 in Windows.
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