Ken: yup, that's what was needed. Thanks. The immutability business is gonna take some time to learn; very different than newLisp, which is a wonderful dialect.
On Aug 31, 12:41 pm, Ken Wesson <kwess...@gmail.com> wrote: > On Wed, Aug 31, 2011 at 3:14 PM, loonster <tbur...@acm.org> wrote: > > I'm converting a newLisp application I wrote, in production for > > several years, into clojure, and got stuck immediately. > > > (def input-list (ref > > '(OR,CA,CO,ID,WA))) > > > (defn list-ploop > > "accepts a ref and returns a list's first and alters the rest" > > [in-list] > > (do > > (dosync > > (ref-set input-list (rest in-list)) > > ((first in-list))))) > > > Issuing (list-ploop @input-list) successfully alters the input-list, > > but it bombs on evaluating the (first ). Many thanks. > > I'm not sure what you're trying to do here, but it seems likely that > > (defn list-ploop > "accepts a ref and returns a list's first and alters the rest" > [in-list] > (dosync > (let [res (first @in-list)] > (alter in-list rest) > res))) > > (list-ploop @input-list) > > is what you're after. > > -- > Protege: What is this seething mass of parentheses?! > Master: Your father's Lisp REPL. This is the language of a true > hacker. Not as clumsy or random as C++; a language for a more > civilized age. -- 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
