Never mind. I think I needed to make this a macro instead of a
function like this:
(defmacro get-output [fn]
`(let [sw# (StringWriter.)]
(binding [*out* sw#] ~fn)
(.toString sw#)))
On Mar 22, 9:34 am, Mark Volkmann <[email protected]> wrote:
> I can't figure out why this function seems to work, but also produces
> a NullPointerException.
>
> (defn get-output [fn]
> (let [sw (StringWriter.)]
> (binding [*out* sw] (fn))
> (.toString sw)))
>
> (get-output (println "foo"))
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