Your array @tmp holds a single array reference, not a list of values — you probably meant 

    my @tmp = @{${$$ref}[3]};

[download]

which can also be written as 

    my @tmp = @{$$ref->[3]};

[download]

BTW, I don't know what the exercise is, but I can't help thinking you have one level of referencing too much... :)

In reply to Re: array reference madness by almut
in thread array reference madness by Anonymous Monk

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