didn't know about definline, thanks Jim!
On Sat, May 25, 2013 at 2:51 PM, Jim - FooBar(); <jimpil1...@gmail.com>wrote: > no need for macros... :) > > (definline safe-assoc [m k v] > `(if (contains? ~m ~k) ~m > (assoc ~m ~k ~v))) > > (definline pred-transform [obj pred tf] > `(if ~(pred obj) ~obj > ~(tf obj))) > > Jim > > > > On 25/05/13 12:44, atkaaz wrote: > > may I see the macro for the latter, if you decide to go that way ? thx > > > On Sat, May 25, 2013 at 2:24 PM, Steven Degutis <sbdegu...@gmail.com>wrote: > >> There are two patterns I find in my code that I'm still unhappy with but >> I don't know how to clean up. >> >> The first is: (if (:attr obj) obj (assoc obj :attr something)) >> >> I'm basically saying, give this hash-map an attribute if it doesn't >> already have it. And just return the thing with an attribute, regardless if >> I had to add it or not. >> >> This version is ugly because it repeats obj three times. I could write >> my own macro to de-duplicate it, but I avoid doing that when I can because >> there's usually a better built-in solution that I just don't know about yet. >> >> The second is like it: (if (some-test obj) obj (some-transformation >> obj)) >> >> In this one, I just want to return the object, but maybe transform it >> first. But the reference to obj happens three times! Still feels like it >> could be cleaned up. >> >> Any thoughts on how to clean these up? >> -- >> -- >> 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. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> > > -- > -- > 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. > For more options, visit https://groups.google.com/groups/opt_out. > > > > > -- > -- > 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. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- -- 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. For more options, visit https://groups.google.com/groups/opt_out.
