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  1. or download this
    >perl -e"my $x=undef; $y++ if $x->{foo}; print $x"
    HASH(0x15d56e0)
    
  2. or download this
    if ($x and $x->{foo} and $x->{foo}{bar} and exists $x->{foo}{bar}{baz}
    +) {
    }