Thanks James, will for something like it I think. Still, would be nice if code was manipulatable with ease - clojure style. Code-is-data such a powerful idea.
On Sunday, July 18, 2021 at 7:43:20 PM UTC+2 James Reeves wrote: > "Code is data" comes up in Clojure less than newcomers might expect. As a > rule of thumb, it should be the last tool you reach for, as it's easier to > work with data structures that have a simpler and more constrained syntax. > > It's often hard to give good advice when context is lacking, but if you > have a grid, and want to supply a sequence of instructions to modify it, > and you want to inspect and manipulate those instructions, then I'd suggest > something like: > > (transform > (grid 10 10) > [[:toggle 2 3 4 5] > [:off 2 3 4 5] > [:on 2 3 4 5]]) > > On Sun, 18 Jul 2021, at 5:40 PM, SideStep wrote: > > Thanks Tania! The point I'm making is that list (data structure for > evaluatable data/code) is not easily manipulatable with code in clojure. So > much for 'code-is-data'... > Thanks for the suggestion. > In regards to rethinking it: it is supposed to be commands coming-in that > sets parts of the grid with on/off/toggle... I want to append those > commands (code) as data to the representation of a grid and evaluate the > list of commands to get the final state of the grid. > Trying to embrace this code-is-data thing here. > On Saturday, July 17, 2021 at 9:21:29 PM UTC+2 tanya.m...@gmail.com wrote: > > > 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 <nesvarb...@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 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. > 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 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. > > To view this discussion on the web visit > https://groups.google.com/d/msgid/clojure/6cf09a4d-aedd-42e4-860c-35efcb68ed50n%40googlegroups.com > > <https://groups.google.com/d/msgid/clojure/6cf09a4d-aedd-42e4-860c-35efcb68ed50n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > > -- > James Reeves > booleanknot.com > > > -- 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/ed22c0d1-cc25-4127-b9ae-2f0733ee874bn%40googlegroups.com.
