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Re^2: A curious case of of my()

by shmem (Canon)
on May 05, 2011 at 10:34 UTC ( #903112=note: print w/ replies, xml ) Need Help??

in reply to Re: A curious case of of my()
in thread A curious case of of my()

$href is empty, since it is not passed into foo. hence @array ends up being a package variable and not a lexical variable.

As others have pointed out, that's wrong. my creates lexicals at compile time. It doesn't have a our fallback. The 'if' modifier with a false condition inhibits the opcode which clears the lexical at runtime.

our @array; # package vaiable @array = qw( foo bar ); sub foo{ my $var = shift; my $href = shift; my @array = $href->{pass_in} if defined $href and exists $href +->{pass_in}; push @array, $var; print "contents : @array\n"; } print "outer scope - contents : @array\n"; foo(1); foo(2); print "outer scope - contents : @array\n"; __END__ outer scope - contents : foo bar contents : 1 contents : 1 2 outer scope - contents : foo bar

As you can see, the variable @array inside the sub is a lexical.

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