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
+cl3.pl 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.