I'm pretty sure the OP is experimenting to see when items are realized, and
wants to know why it's "peeking ahead" one item. Most likely map is seeing
if the next part is empty.
On Wed, Aug 28, 2013 at 5:39 AM, Christian Sperandio <
christian.speran...@gmail.com> wrote:
> In fact, you mix the ou
In fact, you mix the output in the REPL and the result of the map function.
The result of the map call is (1 2 3 4 5), but you have the print display
is managed by the repl and is done when is done :)
If you want as result a string with the negative value, you must do:
(map #(str "-" %) '(1 2 3 4
Hi
user=> (def r (map #(do (print "-") %) '(1 2 3 4 5)))
#'user/r
user=> (println r)
(--1 -2 -3 -4 5)
nil
On Wednesday, August 28, 2013 4:57:49 PM UTC+8, Christian Sperandio wrote:
>
> Hi,
>
> Try just one thing:
>
> (def r (map #(do (print "-") %) '(1 2 3 4 5)))
>
> And after, do (println r)
>
Hi
user=> (def r (map #(do (print "-") %) '(1 2 3 4 5)))
#'user/r
user=> (println r)
(--1 -2 -3 -4 5)
nil
On Wednesday, August 28, 2013 4:57:49 PM UTC+8, Christian Sperandio wrote:
>
> Hi,
>
> Try just one thing:
>
> (def r (map #(do (print "-") %) '(1 2 3 4 5)))
>
> And after, do (println r)
>
Right, thank you!
On Wednesday, August 28, 2013 4:59:33 PM UTC+8, Alex Baranosky wrote:
>
> map is lazy. You shouldn't call side effect functions from it. I
> recommend you use doseq instead.
>
>
> On Wed, Aug 28, 2013 at 1:57 AM, Christian Sperandio <
> christian...@gmail.com > wrote:
>
>> Hi
Hi,
Nothing to get, Nothing to println, please give a detail, thank you.
On Wednesday, August 28, 2013 4:57:49 PM UTC+8, Christian Sperandio wrote:
>
> Hi,
>
> Try just one thing:
>
> (def r (map #(do (print "-") %) '(1 2 3 4 5)))
>
> And after, do (println r)
>
> What do you get?
>
>
>
>
>
>
>
map is lazy. You shouldn't call side effect functions from it. I
recommend you use doseq instead.
On Wed, Aug 28, 2013 at 1:57 AM, Christian Sperandio <
christian.speran...@gmail.com> wrote:
> Hi,
>
> Try just one thing:
>
> (def r (map #(do (print "-") %) '(1 2 3 4 5)))
>
> And after, do (pri
Hi,
Try just one thing:
(def r (map #(do (print "-") %) '(1 2 3 4 5)))
And after, do (println r)
What do you get?
2013/8/28
> Hi
>
> (map #(do (print "-") %) '(1 2 3 4 5))
> I think the result should be (-1 -2 -3 -4 -5), but it is (--1 -2 -3 -4 5),
> it's difficult to understand,
> Can
Hi
(map #(do (print "-") %) '(1 2 3 4 5))
I think the result should be (-1 -2 -3 -4 -5), but it is (--1 -2 -3 -4 5),
it's difficult to understand,
Can someone give answer?
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