Thanks for mentioning doto--hadn't seen that before. Particularly, I think some of my unit tests can be made significantly more readable with that.
Wes On Thu, Sep 27, 2012 at 11:40 AM, Russell Whitaker < russell.whita...@gmail.com> wrote: > On Thu, Sep 27, 2012 at 8:26 AM, arekanderu <arekand...@gmail.com> wrote: > > Thank you Meikel for your so helpful replies. > > > > Thanks also from a lurker, to whom these facts were a useful surprise: > I'd wondered > the same myself. > > Cheers, R > > > > > On Thursday, September 27, 2012 4:19:44 PM UTC+3, Meikel Brandmeyer > > (kotarak) wrote: > >> > >> Hi, > >> > >> Am Donnerstag, 27. September 2012 12:16:41 UTC+2 schrieb arekanderu: > >> > >>> I am new to clojure and I have two questions about do and the way it > >>> should be used. > >>> > >>> Question 1: Which of the following two functions is more idiomatic and > >>> why? Both functions produce the same result. > >>> > >>> <code> > >>> (defn my-fn [java-object] > >>> (. java-object firstFunc) > >>> (. java-object secondFunc) > >>> (. java-object thirdFunc) > >>> java-object) > >>> </code> > >> > >> > >> The first because defn includes an implicit do. So the second example is > >> actually (do (do ...)). > >> > >> In this case you could also use doto: > >> > >> (defn my-fn > >> [pojo] > >> (doto pojo > >> .firstFunc > >> .secondFunc > >> .thirdFunc)) > >> > >> > >>> > >>> Question 2: Again, which one is more idiomatic and why? Both functions > >>> produce the same result. > >>> > >>> <code> > >>> (defn my-fn [java-object bar] > >>> (let [bar-bar (. java-object getSomething) > >>> _ (if (not (is-bar? bar)) > >>> (. java-object (setSomething bar-bar)))] > >>> java-object)) > >>> </code> > >>> > >>> <code> > >>> (defn my-fn [java-object bar] > >>> (let [bar-bar (. java-object getSomething)] > >>> (do > >>> (if (not (is-bar? bar)) > >>> (. java-object (setSomething bar-bar))) > >>> java-object))) > >>> </code> > >> > >> > >> The third: > >> > >> (defn my-fn > >> [pojo bar] > >> (let [bar-bar (.getSomething pojo)] > >> (when-not (is-bar? bar) > >> (.setSomething pojo bar-bar)) > >> pojo))) > >> > >> let also (just like defn) includes an implicit do for the body. > >> > >> Hope this helps. > >> > >> Kind regards > >> Meikel > >> > > -- > Russell Whitaker > http://twitter.com/OrthoNormalRuss / http://orthonormalruss.blogspot.com/ > http://www.linkedin.com/pub/russell-whitaker/0/b86/329 > > -- > 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
