Hi! >> Hm, but even without the reader #=(..) syntax, there's some strangeness: >> >> --8<---------------cut here---------------start------------->8--- >> user> (. java.util.Date newInstance) >> ; Evaluation aborted. >> java.lang.NoSuchFieldException: newInstance >> [Thrown class java.lang.RuntimeException] >> user> (. (identity java.util.Date) newInstance) >> Reflection warning, NO_SOURCE_FILE:1 - reference to field newInstance can't >> be resolved. >> #<Date Fri Sep 09 13:46:06 CEST 2011> >> --8<---------------cut here---------------end--------------->8--- >> >> Why do I have to use identity here? > > This used to be Clojure FAQ #1, when no other syntax was available. > newInstance is an instance method of the class Class, so these days > the best way to call it is (.newInstance java.util.Date). If you want > a static method of class Date, do something like (java.util.Date/UTC 1 > 2 3 4 5 6). These are "modern" syntax. > > It's generally best not to use the older form (. foo bar) as it can be > ambiguous. But just so you know what's going on... If Clojure finds > that foo is a class name, it assumes that bar is a static method or > field of class bar. When if can't find a foo in bar, it gives you the > error above. By wrapping foo in 'identity' you're making it clear to > the compiler that the first arg to . is an expression not a class > name, so it then looks for an instance method or field.
Thanks for the clarifications. :-) Bye, Tassilo -- 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
