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wow incrementing with ++ is not orthogonal to +1!

DB<33> my $y;$y++ DB<34> my $y;$y+1 Use of uninitialized value $y in addition (+) at (eval 38)[/usr/share/ +perl/5.10/] line 2.

from perlop

The auto-increment operator has a little extra builtin magic t +o it. ...(<i>special magic for incrementing strings, ie <c>++($x='x9') eq 'y +0'</i>)... "undef" is always treated as numeric, and in particular is chan +ged to 0 before incrementing (so that a post-increment of an undef value + will return 0 rather than "undef").

Cheers Rolf

In reply to Re^3: Numification of strings by LanX
in thread Numification of strings by LanX

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