for returns a lazy sequence.You may prefer doseq:
(defn fortest2 []
(doseq [a (range 2 10)
b (range 2 10)]
(do
(println "x: " a " b:" b)
(list a b)))
(println "ende")
)
(fortest2)
doseq will be forced for side-effects.
2012/1/19 Jack Moffitt <[email protected]>
> > doesn't show any effect of the for.
> > The only difference is the additional statement at the end.
> > I can not imagine how this statement sequentially behind can influence
> > the for.
>
> for returns a lazy sequence. In the first case, in printing out the
> result to the REPL, the lazy sequence is realized, and in the second,
> the result is discarded so it is never realized.
>
> jack.
>
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庄晓丹
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淘宝（中国）软件有限公司 / 产品技术部 / Java中间件
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