in reply to Re: use strict Question?
in thread use strict Question?
I think the original poster is referring to the fact that they didn't need
my $a
or
my $b
but they did need
my $c
my $d , etc etc
The reason for this is that $a and $b are global variables which are used by the sort function.
See perldoc -f sort for more
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If the subroutine's prototype is "($$)", the elements to be compared are passed by reference in @_, as for a normal subroutine. This is slower than unprototyped subroutines, where the elements to be compared are passed into the subroutine as the package global variables $a and $b (see example below). Note that in the latter case, it is usually counter-productive to declare $a and $b as lexicals.
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Re^3: use strict Question?
by Anonymous Monk on Dec 07, 2009 at 12:17 UTC |
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Seekers of Perl Wisdom