my %hash;
my @hash_array;
$hash{key1} = 'value1';
push @hash_array, 'key1';
$hash{key2} = 'value2';
push @hash_array, 'key2';

. . . 

# Fetch the values. Notice that '%hash' has 
# an array sigil.
my @values = @hash{@hash_array};