Alan, What you're asking for is to derive the ns "clojure.core" given only "core". Not sure if that's possible.
The namespace constitutes the whole dotted structure and not just the last component, I am afraid. If the actual ns is something.something.version-0-1-1, then you need the string "something.something.version-0-1-1" and not just "version-0-1-1" [unless of course you have some other way of deriving it from info that's embedded in _your_ code or structure thereof]. -BG On Tue, Dec 18, 2012 at 1:10 PM, Alan Shaw <noden...@gmail.com> wrote: > Thanks BG, I'm trying that. > But I don't think it addresses how to get from the string "version-0-1-1" to > the namespace something.something.version-0-1-1. How can I do that? > > -A > > > > On Mon, Dec 17, 2012 at 11:26 PM, Baishampayan Ghose <b.gh...@gmail.com> > wrote: >> >> Alan, >> >> Something like this might work for you - >> >> (defmacro eval-in >> "Eval a Clojure form in a different namespace and switch back to >> current namespace. >> >> Args: >> code - Clojure form as string >> ns - Target namespace as string" >> [code ns] >> `(do >> (in-ns '~(symbol ns)) >> (let [ret# (eval '~(read-string code))] >> (in-ns '~(ns-name *ns*)) >> ret#))) >> >> Warning - I haven't really tested this code. >> >> -BG >> >> On Tue, Dec 18, 2012 at 12:37 PM, Alan Shaw <noden...@gmail.com> wrote: >> > Thanks, Las! >> > >> > Ok say I have a file in which there is string such as >> > >> > "(- (atan (bw-noise 902 2 0.7604615575402431 400 400)) >> > (read-image-from-file >> > \"images/Dawn_on_Callipygea.png\"))" >> > >> > and another >> > >> > "version-0-0-1" >> > >> > and I have a namespace version-0-0-1 into which functions named atan >> > etc. >> > are all :referred. I want to evaluate the expression in that particular >> > context, and not remain there when I'm done. >> > >> > -A >> > >> > >> > >> > On Mon, Dec 17, 2012 at 11:00 PM, László Török <ltoro...@gmail.com> >> > wrote: >> >> >> >> ah, sorry, it's a bit early for me >> >> >> >> (in-ns (ns-name user-ns)) >> >> >> >> if you could post a simple example for the second part of your question >> >> I >> >> maybe able to help. >> >> >> >> Las >> >> >> >> Alan Shaw 2012. december 18., kedd napon a következőt írta: >> >> >> >>> Ah no, that puts me in a new user-ns namespace! Not what I wanted! >> >>> >> >>> >> >>> On Mon, Dec 17, 2012 at 10:51 PM, László Török <ltoro...@gmail.com> >> >>> wrote: >> >>>> >> >>>> Try (in-ns 'user-ns) >> >>>> >> >>>> Las >> >>>> >> >>>> On Dec 18, 2012 7:50 AM, "Alan Shaw" <noden...@gmail.com> wrote: >> >>>>> >> >>>>> user=> *ns* >> >>>>> #<Namespace user> >> >>>>> user=> (def user-ns *ns*) >> >>>>> #'user/user-ns >> >>>>> user=> user-ns >> >>>>> #<Namespace user> >> >>>>> user=> (in-ns user-ns) >> >>>>> ClassCastException clojure.lang.Namespace cannot be cast to >> >>>>> clojure.lang.Symbol clojure.lang.RT$1.invoke (RT.java:226) >> >>>>> >> >>>>> It appears I'm not understanding how namespaces are represented. >> >>>>> >> >>>>> Also, is it just wrong of me to want to remember a namespace I was >> >>>>> working in and try to go back to it later? >> >>>>> >> >>>>> The slightly larger context is: I'm saving an s-expression with >> >>>>> unqualified names in it into a file as a string. Also saving a >> >>>>> string >> >>>>> indicating the name of the environment in which that string should >> >>>>> be (read >> >>>>> and) eval'ed so that the names will resolve to the appropriate >> >>>>> functions. >> >>>>> Advice on managing this would be appreciated. >> >>>>> >> >>>>> -Alan Shaw >> >>>>> >> >>>>> -- >> >>>>> 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 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 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 >> >> >> >> >> >> >> >> -- >> >> László Török >> >> >> >> -- >> >> 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 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 >> >> >> >> -- >> Baishampayan Ghose >> b.ghose at gmail.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 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 -- Baishampayan Ghose b.ghose at gmail.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
