That whole form is not something you would be likely to write. I think the exercise is just trying to demonstrate that the version with the -> is equivalent to the version without the arrow and perhaps also that (= a b c) can be used instead of (and (= a b) (= b c)).
-- Michael Wood On 01 May 2014 5:02 PM, "Roelof Wobben" <rwob...@hotmail.com> wrote: > oke, > > I misunderstood everyone. > The right answer is last. > > (def A (__ (sort (rest (reverse [2 5 4 1 3 6]))))) > which would be : > > (def A (last (sort (rest (reverse [2 5 4 1 3 6]))))) > which resolves to 5 > > (def B (-> [2 5 4 1 3 6] (reverse) (rest) (sort) (__))) > Which would be : > > (def B (-> [2 5 4 1 3 6] (reverse) (rest) (sort) (last))) > > which resolves also to 5 > > so the last part : > > ( = a b 5) is also true ( = 5 5 5) > > Still I find it wierd to make such sort of form. > > Roelof > > > Op donderdag 1 mei 2014 16:35:59 UTC+2 schreef Erlis Vidal: > >> Look that (def A ...) won't compile as given, so you cannot say A is [1 2 >> 3 4 5], A is something else once you make it compile filling the blank >> space with the missing function. >> >> >> On Thu, May 1, 2014 at 10:24 AM, Maik Schünemann <maiksch...@gmail.com>wrote: >> >>> The task is to replace __ with the function that makes this true in this >>> case makes [1 2 3 4 5] to 5 >>> >>> >>> On Thu, May 1, 2014 at 4:23 PM, Maik Schünemann <maiksch...@gmail.com>wrote: >>> >>>> >>>> >>>> >>>> On Thu, May 1, 2014 at 3:51 PM, Roelof Wobben <rwo...@hotmail.com>wrote: >>>> >>>>> >>>>> >>>>> Op donderdag 1 mei 2014 15:20:38 UTC+2 schreef Erlis Vidal: >>>>> >>>>>> I think the confusion is because they used multiple values when >>>>>> comparing the equality >>>>>> >>>>>> (= (__ (sort (rest (reverse [2 5 4 1 3 6])))) >>>>>> (-> [2 5 4 1 3 6] (reverse) (rest) (sort) (__)) >>>>>> 5) >>>>>> >>>>>> This can be seen as : >>>>>> (def A (__ (sort (rest (reverse [2 5 4 1 3 6]))))) >>>>>> (def B (-> [2 5 4 1 3 6] (reverse) (rest) (sort) (__))) >>>>>> >>>>>> Then the 4Clojure exercise can be written as: >>>>>> >>>>>> (= A B 5) >>>>>> >>>>>> Do not feel bad, this took me some time to realize 5 was not part of >>>>>> B. >>>>>> >>>>> >>>>> No problem. But still it does not make any sense. >>>>> >>>>> If I do it right. this schould be the output of the functions >>>>> >>>>> A [ 1 2 3 4 5] >>>>> B [ 1 2 3 4 5] >>>>> (= A B 5) --> [1,2,3,4,5] = [1,2,3,4,5] = 5 and this is not true. >>>>> >>>> This is the output when you don't write the function to replace __. >>>> >>>> >>>>> >>>>> >>>>> >>>>>> >>>>>> >>>>>> >>>>>> On Thu, May 1, 2014 at 7:52 AM, Roelof Wobben <rwo...@hotmail.com>wrote: >>>>>> >>>>>>> Is this a nice explanation about macros : >>>>>>> http://bryangilbert.com/code/2013/07/30/anatomy-of-a-clojure-macro/ >>>>>>> >>>>>>> or is there a better one for a beginner. >>>>>>> >>>>>>> Roelof >>>>>>> >>>>>>> >>>>>>> -- >>>>>>> You received this message because you are subscribed to the Google >>>>>>> Groups "Clojure" group. >>>>>>> To post to this group, send email to clo...@googlegroups.com >>>>>>> >>>>>>> Note that posts from new members are moderated - please be patient >>>>>>> with your first post. >>>>>>> To unsubscribe from this group, send email to >>>>>>> clojure+u...@googlegroups.com >>>>>>> >>>>>>> For more options, visit this group at >>>>>>> http://groups.google.com/group/clojure?hl=en >>>>>>> --- >>>>>>> You received this message because you are subscribed to the Google >>>>>>> Groups "Clojure" group. >>>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>>> send an email to clojure+u...@googlegroups.com. >>>>>>> >>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>> >>>>>> >>>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "Clojure" group. >>>>> To post to this group, send email to clo...@googlegroups.com >>>>> Note that posts from new members are moderated - please be patient >>>>> with your first post. >>>>> To unsubscribe from this group, send email to >>>>> clojure+u...@googlegroups.com >>>>> For more options, visit this group at >>>>> http://groups.google.com/group/clojure?hl=en >>>>> --- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "Clojure" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>> an email to clojure+u...@googlegroups.com. >>>>> For more options, visit https://groups.google.com/d/optout. >>>>> >>>> >>>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Clojure" group. >>> To post to this group, send email to clo...@googlegroups.com >>> Note that posts from new members are moderated - please be patient with >>> your first post. >>> To unsubscribe from this group, send email to >>> clojure+u...@googlegroups.com >>> For more options, visit this group at >>> http://groups.google.com/group/clojure?hl=en >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "Clojure" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to clojure+u...@googlegroups.com. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient with > your first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en > --- > You received this message because you are subscribed to the Google Groups > "Clojure" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to clojure+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Clojure" group. 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