Hi Roelof, I start the 4Clojure exercises and I did a little project so I can keep a record of my solutions. It's really simple but also I've found it really helpful to see where my errors are.
You can fork it from here... if you want. https://github.com/erlis/4Clojure You only have there the first 5 or 6 ones, the only thing you have to do is continue adding exercises and your answers. This will help you also to become familiar with your dev environment. I'm using Emacs but you can use whatever you want. Regards, Erlis On Sun, May 4, 2014 at 11:06 AM, James Reeves <ja...@booleanknot.com> wrote: > Remember that indexes work from zero. So if you have a collection of 3 > elements: > > (nth ["a" "b" "c"] 2) => "c" > (nth ["a" "b" "c"] 1) => "b" > (nth ["a" "b" "c"] 0) => "a" > > I'd encourage you to open a REPL and try the solution you have to see what > you get if you get stuck. Often some experimentation will show you what > you're doing wrong. > > - James > > > On 4 May 2014 15:58, Roelof Wobben <rwob...@hotmail.com> wrote: > >> oke, >> >> Then I think I have to work with a if then : >> >> The second test is already a vector but the thirth not >> >> (= (__ ["a" "b" "c"]) "b") >> >> (= (__ [[1 2] [3 4]]) [1 2]) >> >> I tried already the nth but I was also failing on the first. I think >> because of count because you cannot know how many values you have. >> >> (fn secondlast [v] >> (nth v (-(count v)1))) >> >> >> Roelof >> >> Op zondag 4 mei 2014 16:49:45 UTC+2 schreef Lee: >> >>> >>> >>> On May 4, 2014, at 10:42 AM, Roelof Wobben <rwo...@hotmail.com> wrote: >>> >>> > For 4clojure I have to find the second to last item. >>> > >>> > So I did this: >>> > >>> > (fn secondlast [v] >>> > (get v (-(count v)1))) >>> > >>> > Now it's only failing at this test : (= (__ (list 1 2 3 4 5)) 4) >>> > >>> > Can anyone tell me where I did take the wrong way. >>> >>> >>> The "get" function with integer keys works for vectors but not for >>> lists: >>> >>> => (get [7 8 9] 1) >>> 8 >>> => (get '(7 8 9) 1) >>> nil >>> >>> So one option would be to call "vec" on the list before calling get: >>> >>> => (get (vec '(7 8 9)) 1) >>> 8 >>> >>> Another option would be to use "nth" instead of "get". >>> >>> -Lee >>> >>> -- >> 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. > 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. 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.
