Thanks, This solbved my problem. Roelof
Op zondag 4 oktober 2015 11:51:49 UTC+2 schreef Moe Aboulkheir: > > Roelof, > > The function you're passing to reduce still wants to accept two > arguments. See the documentation: > https://clojuredocs.org/clojure.core/reduce > > Take care, > Moe > > On Sun, Oct 4, 2015 at 8:40 AM, Roelof Wobben <wobben...@gmail.com > <javascript:>> wrote: > >> Oke, then I hve to find out where to put the initial value. >> >> These two do not work : >> >> (reduce (fn [counter] (inc counter)) 0 [1,2,3]) >> (reduce (fn [counter] (inc counter) 0 ) [1,2,3]) >> >> Op zaterdag 3 oktober 2015 23:34:20 UTC+2 schreef Moe Aboulkheir: >>> >>> Roelof, >>> >>> Unless supplied with an initial value, reduce will use the first value >>> from the collection you supply - every sequence which doesn't start with >>> "1" will give you the wrong answer. >>> >>> Take care, >>> Moe >>> >>> On Sat, Oct 3, 2015 at 9:40 PM, Roelof Wobben <wobben...@gmail.com> >>> wrote: >>> >>>> Hello, >>>> >>>> I have to make a function which counts a collection without using count. >>>> >>>> So I came up with this : >>>> >>>> (fn [coll] (reduce (fn [counter _ ] (inc counter)) coll))) >>>> >>>> it works well with coll is [ 1 2 3] >>>> >>>> but it fails with "Hello World" >>>> >>>> How can I improve my code to work in both cases. >>>> >>>> Please , do not only give the answer but rather explain how I can make >>>> this work. >>>> So I learn a lot and not do only a copy/paste. >>>> >>>> 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 >> <javascript:> >> 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 <javascript:> >> 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 <javascript:>. >> 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.
