Hello,
2013/9/19 Murtaza Husain <murtaza.hus...@sevenolives.com> > > Wow ! Thanks for the link Jozef. > > Another question - > > From the Stuart Sierra blog on Lifecycle Composition - > > > (defrecord Database [uri connection-atom] > Lifecycle > (start [_] > (future (reset! connection-atom (connect uri)))) > (stop [_] > (.close @connection-atom) > (future (reset! connection-atom nil)))) > > (defn database [uri] > (->Database uri (atom nil))) > > I know I can create record objects as (Database. uri (atom nil)) > > However I cant understand how and why the above (-> Database uri (atom > nil)) works ? > No, it's (->Database uri (atom nil)) : there's no space between -> and Database. This factory function ->Database is automatically created by the defrecord macro (see the end of the docstring for defrecord: http://clojure.github.io/clojure/clojure.core-api.html#clojure.core/defrecord) HTH, -- Laurent > > Thanks, > Murtaza > > > On Thursday, September 19, 2013 9:04:53 PM UTC+5:30, Jozef Wagner wrote: >> >> The example you've given is just a stub, not a full implementation of the >> record. The magic is happening in emit-defrecord https://github.** >> com/clojure/clojure/blob/**master/src/clj/clojure/core_**deftype.clj#L148<https://github.com/clojure/clojure/blob/master/src/clj/clojure/core_deftype.clj#L148> >> >> Best, >> JW >> >> >> >> On Thu, Sep 19, 2013 at 5:21 PM, Murtaza Husain <murtaza...@sevenolives.* >> *com> wrote: >> >>> Hi, >>> >>> I was going through the article regarding clojure protocols and >>> datatypes - http://www.ibm.com/**developerworks/java/library/j-** >>> clojure-protocols/index.html<http://www.ibm.com/developerworks/java/library/j-clojure-protocols/index.html> >>> >>> In it an example is given for a new defrecord that the author creates. >>> The generated java source for the record as given in the article - >>> >>> >>> public class PurchaseOrder >>> implements Fulfillment, >>> java.io.Serializable, >>> java.util.Map, >>> java.lang.Iterable, >>> clojure.lang.IPersistentMap { >>> >>> public final Object date; >>> public final Object customer; >>> public final Object products; >>> >>> public PurchaseOrder(Object date, Object customer, Object products) { >>> this.date = date; >>> this.customer = customer; >>> this.products = products; >>> } >>> } >>> >>> >>> My question - I can see that the generated class implements the >>> java.util.Map and clojure.lang.IPersistentMap interfaces. However where are >>> the code for implementations of the interfaces ? I do not see any concrete >>> code other than the constructor and some fields. >>> >>> Thanks, >>> Murtaza >>> >>> -- >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Clojure" group. >>> To post to this group, send email to clo...@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+u...@**googlegroups.com >>> For more options, visit this group at >>> http://groups.google.com/**group/clojure?hl=en<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+u...@**googlegroups.com. >>> For more options, visit >>> https://groups.google.com/**groups/opt_out<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.
