The comp is the same comp as in clojure.core, but the way that transducers
are implemented, comp has the effect of chaining them in a left-to-right
manner rather than the way it behaves with regular functions. I actually
prefer left-to-right composition, but it is somewhat unfortunate that
transducers compose in the opposite direction from normal functions; I
suspect this is going to be a point of confusion for many people.
On Sun, Aug 24, 2014 at 11:39 AM, Ashton Kemerling <
ashtonkemerl...@gmail.com> wrote:
> If you are referring to the new transducer comp, if I recall correctly it
> works in the opposite direction from the comp in clojure.core. I can't find
> any docs at hand that prove that, so I would check the docstring of comp.
>
>
> On Sun, Aug 24, 2014 at 11:04 AM, rogergl <ro...@gilliar.de> wrote:
>
>> I have problems to understand how the following code evaluates. I
>> understand what the code does but not how this result is computed:
>>
>> BTW: This is an example from the async webinar:
>>
>> (chan 1 (comp (map #(.-keyCode %))
>> (filter #{37 39})
>> (map {37 :previous 39 :next})))))
>>
>> For example: comp evaluates from right to left. But this code looks more
>> like it is evaluated from left to right ?
>>
>> Regards
>> Roger
>>
>>
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