Hi, conj <https://clojuredocs.org/clojure.core/conj> adds at the end of a vector, but at the beginning of a list. It is how it is implemented. I think this <https://stackoverflow.com/questions/5734435/put-an-element-to-the-tail-of-a-collection> and this <https://medium.com/@greg_63957/conj-cons-concat-oh-my-1398a2981eab> sums it up why.
You could achieve what you want by using concat <https://clojuredocs.org/clojure.core/concat> (note this returns a LazySeq): user=> (concat grid '((off 1 2 3 6))) (-> (grid 10 10) (toggle 2 3 4 5) (off 2 3 4 5) (on 2 3 4 5) (off 1 2 3 6)) Though I'm not exactly sure what is the end goal of this but I'd rethink the way it is done. On Sat, 17 Jul 2021 at 14:24, SideStep <nesvarbu.vi...@gmail.com> wrote: > > <https://stackoverflow.com/posts/68420449/timeline> > > I have a representation of a matrix in grid.clj file: > > (-> (grid 10 10) > (toggle 2 3 4 5) > (off 2 3 4 5) > (on 2 3 4 5)) > > It's a list of functionts, first one initializes a grid, others modify it. > Clojures' 'code is data' supposed to make it easy for me to modify that > representation by adding an instrucion at the *end* of collection. List > is an ordered collection right? Order matters. How do I add an instruction > to the end of the list then? > Something like this: > > (def grid (read-string (slurp "grid.clj"))) > (conj grid '(off 1 2 3 6)) > > Yet I can't add to the end of the list, which is a data structure that is > evaluatable as code. How is it 'code as data' if I can't add to the end of > the ordered collection that is meant for code (as data)? > > -- > 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. > To view this discussion on the web visit > https://groups.google.com/d/msgid/clojure/efd72013-a85e-46e8-b9db-10dde1a8a235n%40googlegroups.com > <https://groups.google.com/d/msgid/clojure/efd72013-a85e-46e8-b9db-10dde1a8a235n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/clojure/CADBYUPvzMtspZxxc5PhmkXyNg7kJqgMG%3DWVkUe2FKsf%2BGsdaFA%40mail.gmail.com.
