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Using perl -MO=Deparse may shed some light on some of this weirdness, although I have no idea why on Earth anyone would implement 'inf' the way it works on my box.
perl -MO=Deparse -e 'print $n[inf]'
prints
print $n[9**9**9];
as does
perl -MO=Deparse -e 'print $n["inf"]'

 

On the other hand,

perl -MO=Deparse -e 'print $n[-inf]'
prints
print $n[-'inf'];

 

perl -MO=Deparse -e 'print "", inf==0 ? "a" : "b", 'inf'==0 ? "c" : "d +", -inf==0 ? "e" : "f"'
prints
print '', 'inf' == 0 ? 'a' : 'b', 'inf' == 0 ? 'c' : 'd', -'inf' == 0 +? 'e' : 'f';

As nearly as I can tell at the moment, inf is only equivalent 9**9**9 if it is used by itself as a subscript; it is taken as a bareword in a simple assignment, so

perl -MO=Deparse -e '$n[inf], $n[1+inf], $n[-inf] = inf'
prints
$n[9**9**9], $n[1 + 'inf'], $n[-'inf'] = 'inf';

 

My perl -v shows,

This is perl, v5.8.8 built for i486-linux-gnu-thread-multi

 

Does anyone know why? - quester


In reply to Re^2: $array[ 'Infinity' ] by quester
in thread $array[ 'Infinity' ] by Sixtease

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