From: Lyle Johnson <lyle@...>
Date: 2002-05-30T13:23:55+09:00
Subject: Re: Infinity (?!)

> So, my question is, how can you determine if a variable contains Infinity?

    irb(main):001:0> x = 2.0/0.0
    Infinity
    irb(main):002:0> x.finite?
    false
    irb(main):003:0> x.infinite?
    1

Note that Float#infinite? returns either -1 or +1, to indicate negative or
positive infinity.