in reply to $array[ 'Infinity' ]

Is this documented anywhere?
Yes, in sv.c in the perl source ("use the source, luke" ;-)

Line 1680 ff:

/* =for apidoc looks_like_number Test if the content of an SV looks like a number (or is a number). C<Inf> and C<Infinity> are treated as numbers (so will not issue a non-numeric warning), even if your atof() doesn't grok them. =cut */

and so - suprise! - perlapi tells the same.

Read through sv.c to see what happens. The perl5 spec is coherent with its implementation ;-)


_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}