This series on numerics is both useful and entertaining! Believe it or
not, JS has +/- 0.
http://www.2ality.com/2012/03/signedzero.html
It may seem weird but it does come up in some cases.
A possibly more important part of the series is just what IS an integer in
JS. Most of us consider it a 32 bit integer but that's not the case:
http://www.2ality.com/2013/10/safe-integers.html
-- Owen
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