use unshift to add items to the start of an array.
If by "null" you mean undef, then try this:
use Data::Dumper;
my @array1 = qw( 1 2 3 );
my @array2 = qw( 4 );
unshift @array2, undef for @array1;
print Dumper( \@array2 );
output:
$VAR1 = [
undef,
undef,
undef,
'4'
];
--
"To err is human, but to really foul things up you need a computer." --Paul Ehrlich
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