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( #3333=superdoc: print w/replies, xml ) Need Help??
I have the following hash of hashes:
my %switch_hash = ( chrdex => { DEX => { '01-AUG-02' => 1, '03-AUG-02' => 3, } }, uslcgb5e2sm =>{ Greensboro => { '4-AUG-02' => 1, '6-AUG-02' => 2, } }, uslecat25e1 => { 'Atlanta II' => { '1-AUG-02' => 1, '2-AUG-02' => 3, '3-AUG-02' => 1, '4-AUG-02' => .25, } }, ); $rhent = \%switch_hash;
I want to do this:
my @dates = ( keys %{(keys %{(keys %$rhent)})} );
and I get this error:
Can't use string ("3") as a HASH ref while "strict refs" in use at ./x line 301
Can something like this be done to get the key containing the date from the final hash? NOTE: There is a reason for using a reference, but that is beyond the scope of this question.

In reply to using 'keys' recursively on a hash of hashes by gnu@perl

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