Erg, gmail hiccup. Started to say if you try to use it in code that's *not* being called from the REPL, you'll be scratching your head trying to figure out why aset never gets called.
Mark On Mon, Sep 13, 2010 at 12:27 PM, Mark Nutter <manutte...@gmail.com> wrote: > The REPL automatically realizes the lazy sequence in the process of > printing it out, but if you try to us > > On Mon, Sep 13, 2010 at 11:07 AM, Ranjit <rjcha...@gmail.com> wrote: >> Thanks Armando for catching my stupid mistake. That fixed everything. >> >> Meikel, I'm not sure I understand what you're saying. When I evaluate >> this in the REPL >> >> (for [x (range 2) y (range 2)] (aset xt x y (+ x y))) >> (aget xt 0 0) >> (aget xt 1 1) >> >> I get back 0 and 2 as I expect. Isn't the call to aset consuming the >> lazy sequence? >> >> Thanks. >> >> On Sep 13, 11:00 am, Meikel Brandmeyer <m...@kotka.de> wrote: >>> Hi, >>> >>> On 13 Sep., 15:07, Ranjit Chacko <rjcha...@gmail.com> wrote: >>> >>> > (for [x (range 3) y (range 3)] (aset xt x y 1)) >>> >>> Note that that this will not do what you think it does. for creates a >>> lazy sequence which is thrown away immediately. So the aset calls are >>> never done. for is a list comprehension, not a looping construct. >>> Replace for with doseq. As a rule of thumb: side-effects => command >>> starting in "do". >>> >>> Sincerely >>> Meikel >> >> -- >> 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
