On Fri, Oct 21, 2011 at 12:52 AM, nathanmarz <nathan.m...@gmail.com> wrote: > user=> (class (Integer/parseInt "1")) > java.lang.Long
(Integer/parseInt "1") returns an int - which Clojure promotes to long (since it only has 64-bit primitives) and class takes an Object so long is boxed to Long. > user=> (class (Integer/valueOf "1")) > java.lang.Integer (Integer/valueOf "1") returns an Integer - which is already an Object so (class Integer-value) returns Integer. You're only going to get 32-bit ints if you are calling into Java and that API expects an int - and you coerce the (64-bit primitive long) Clojure primitive to a 32-bit int (again, as I understand the 1.3 numerics). If Java gives Clojure an int, it will be treated as a 64-bit long. If Java gives Clojure an Integer, it will be treated as an Object. I rather like the simplicity of 1.3's numeric handling: there are only longs and doubles - but you can coerce them to whatever you need for interop. It's performant by default, it's simple and consistent (in my eyes) and yet still flexible. -- Sean A Corfield -- (904) 302-SEAN An Architect's View -- http://corfield.org/ World Singles, LLC. -- http://worldsingles.com/ Railo Technologies, Inc. -- http://www.getrailo.com/ "Perfection is the enemy of the good." -- Gustave Flaubert, French realist novelist (1821-1880) -- 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
