Oh yes, thanks for refreshing my memory. And indeed it makes sense to place the question mark in the "questioned" side :)
2009/11/13 Wilson MacGyver <wmacgy...@gmail.com>: > Yes, it's groovy, and it's "?." It's called safe navigation operator > > http://groovy.codehaus.org/Operators#Operators-SafeNavigationOperator%28%3F.%29 > > On Thu, Nov 12, 2009 at 6:03 PM, Laurent PETIT <laurent.pe...@gmail.com> > wrote: >> 2009/11/3 Alex Osborne <a...@meshy.org>: >>> >>> Sean Devlin wrote: >>>> This is slightly unrealted, but how does one pronounce ->, ->> and the >>>> like? Is this documented? >>> >>> The doc-strings usually give you a nice hint. I usually use "thread" >>> for -> and "thread last" for ->>. The actual symbols I think of as >>> "arrow" and "double arrow". >>> >>> Then -?> in contrib is "short-circuiting thread". Not sure about the >>> symbol, perhaps "questionable arrow"? ;-) >> >> The question mark ? is there to "mimic" (somewhat) what one can find >> in OO languages such as groovy (I think it's groovy, is it ?) : >> >> someObject.?propA.?prop2 >> >> where .? will check if the object is null before trying to get a >> property (or method) on it. If null : returns null, if not null, >> returns the property etc. >> >> Initially i wanted to name it ->? but the final ? is by convention >> reserved for predicates, so Rich suggested -?> (and also .?. for the >> .. equivalent). >> >> -- >> 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 > > > > -- > Omnem crede diem tibi diluxisse supremum. > > -- > 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
