user=> (Math/abs (- Long/MIN_VALUE 1) this hung my clojure repl, clojure 1.1
~~ Paul Joseph Iannazzo. On Tue, Nov 2, 2010 at 10:09 PM, ataggart <alex.tagg...@gmail.com> wrote: > In a two's-complement system, values always have one more negative > number than positive number. -2147483648 (being the most negative int) > has no positive equivalent that can be expressed as an int (Math/abs > overloads on primitive type). > > Sean's example using 1.3.0-SNAPSHOT works because literal numbers are > now read in as longs or doubles. This is also why the original (Math/ > abs (- Integer/MIN_VALUE 1)) gave the desired result as the int was > converted to a long via the subtraction function. > > Of course, the same "problem" would arise if one tried to use the most > negative long: > > user=> (Math/abs Long/MIN_VALUE) > -9223372036854775808 > > The unsurprising behavior might be for a clojure abs function to > instead throw an ArithmeticException, since 9223372036854775808 cannot > be expressed as a long. > > -- > 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<clojure%2bunsubscr...@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
