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  1. or download this
    use strict;
use warnings;
...
sub retFalse {
    return 1 == 0;
}
  2. or download this
    $SCALAR1 = \do { my $v = undef };
$SCALAR1 = \do { my $v = undef };
$SCALAR1 = \do { my $v = undef };
$SCALAR1 = \do { my $v = '' };
$SCALAR1 = \do { my $v = 0 };
  3. or download this
    ...

...
Dump (\@retFalse2);

...
  4. or download this
    $ARRAY1 = [];
$ARRAY1 = [];
$ARRAY1 = [ undef ];
$ARRAY1 = [ '' ];
$ARRAY1 = [ 0 ];