Or declare @array within the while loop. This avoids making a copy of the array to make the anonymous reference.
#!/usr/bin/perl
use strict;
use warnings;
use Data::Dumper;
$Data::Dumper::Indent = 1;
my %hash;
while (my $rec = <DATA>){
chomp $rec;
# declare the array
my ($key, @array) = split(/ /, $rec, 2);
$hash{$key} = \@array;
}
print Dumper \%hash;
__DATA__
1 2 3 4
5 6 7 8
$VAR1 = {
'1' => [
'2 3 4'
],
'5' => [
'6 7 8'
]
};
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