http://www.perlmonks.org?node_id=708232


in reply to Re^2: nans, infs, and vomit
in thread nans, infs, and vomit

Re^3: $array[ 'Infinity' ]
http://www.perl.com/doc/FMTEYEWTK/is_numeric.html
http://en.wikipedia.org/wiki/Strtod