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 For more options, visit this group at http://groups.google.com/group/clojure?hl=en
