Further to explain this behaviour:
> (let [b (new StringBuffer)]
> (map #(.. b (append (str % " "))) '("blah" "blah" "blah")))
> #<StringBuffer blah blah blah >)
If you are using the REPL the return result is the lazy-seq, and this
gets forced to display the result. However in your original code you
return b, so the lazy-seq is not evaluated.
Regards,
Tim.
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