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New Math Methods

From: Richard W.
Sent on: Tuesday, February 7, 2012 8:30 PM
Hey all,

I'm interested to know if there was any LJC consensus about which
overflow safe Mathematical functions to introduce in Java 8.  Stephen
Colebourne makes the case for several more methods than are currently
planned to go in on his blog -
http://blog.joda....­.  The case
for not including them is probably best summed up by the following
quote from openjdk's java-core-libs mailing list.

"First of all, negate(x) certainly is replaceable by subtractExact(0,
x). Secondly, the problem is more that people don't realize that -x
might not be exact. If you know there's a problem then it isn't any
easier for you to know that a solution is to be found in Math than to
know that the problem is with MIN_VALUE."

The case against increment and decrement is similar - that they're
easy to if you've got safe addition/subtraction­.

Perhaps you don't care at all about this and consider it a minor
implementation detail - I'm also interested in hearing any opinions on
the subject.



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