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Re: Side effect of passing matched values by reference

by choroba (Canon)
on Feb 21, 2013 at 17:22 UTC ( #1019989=note: print w/ replies, xml ) Need Help??


in reply to Side effect of passing matched values by reference

That is not a consequence of passing by reference, in fact. It is a consequence of aliasing. See perlsub for details. This would not happen if you use a different variable than @_:

sub foo { my $x = $_[0]; print "$x\n"; $x =~ /(.)/; print "$x\n\n"; }
لսႽ ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ


Comment on Re: Side effect of passing matched values by reference
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Re^2: Side effect of passing matched values by reference
by puterboy (Scribe) on Feb 21, 2013 at 18:23 UTC
    Of course - that was the solution I used. My point was just that it wasn't obvious (at least to me) that $1 acts like a global variable in that way...

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