Thanks for all the replies which are very instructive! (1) Thanks for leting me know that using following statement is referred to another hash which is not what I expected. 
my $slice = {
    kind    => $kind,
    prop    => $prop,
    item    => 5..11
};

[download]

(2) Thanks for pointing out the dereference method like: 
my @items = @{$slice -> {item}};

[download]
I don't really understand why I need use @{} here to dereference, can somebody explain it for more details? I am just a Perl newbie :)
(3) Thanks for present a good program for data structure viewer -- Data::Dumper. I guessed I heard of it sometime ago, now I know how to use it. It's a good toolkit for debugging too.
(4) Thanks for criticizing my bad coding style (using map in a void context). I am digging into the link to find out why I should avoid to use this style... :)

In reply to Re^2: how to store an array to a pseudohash? by Hanken
in thread how to store an array to a pseudohash? by Hanken

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