On Fri, Jan 23, 2015 at 1:10 AM, Luc Prefontaine < lprefonta...@softaddicts.ca> wrote:
> Agree, it's broken... in java... > I think it's more frustrating in Clojure than in Java, though, because in Java you have those big, ugly type annotations on every single variable, input and output, so there's really no question when you're working with a mixture of floats and doubles. In Clojure, it's much easier for this kind of thing to slip into your program unnoticed. Call a couple of external libraries that produce floats or doubles -- Clojure will happily hide the difference from you and then you get burned. As I frequently find myself explaining to newcomers to Clojure, one of Clojure's biggest weaknesses is that it goes to great pains to hide type details (floats vs doubles, boxed vs unboxed, hash sets vs array sets, etc.) and every once in a while it really matters -- a lot -- what the types actually are and there aren't many tools for discovering the flow of types through your code. So I wouldn't necessarily go blaming this on Java. Furthermore, I'm not so sure it is broken in Java: => (.equals (float 2) (double 2)) false => (.compareTo (float 2) (double 2)) ClassCastException Cannot cast java.lang.Double to java.lang.Float java.lang.Class.cast (Class.java:3258) So Java doesn't appear to transparently treat floats and doubles as equal (which is consistent with the fact that Java's hashes of floats and doubles can be different). -- 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/d/optout.
