keys (array of hashes)

[vvv]

I have array of hashes
$array[0]{in}=
$array[1]{in}=
$array[2]{in}=
$array[0]{out}=
$array[1]{out}=
$array[2]{out}=

and want to do something like

foreach $key ( keys($aaray[0]) ) {lalala}

but keys require explicitly %HASH
i've tried to make %temp=$array{0}; and then keys(%temp)
but it doesn't works 8_(
someone help?

 

[vvv]

I've solved the problem

by setting %temp=%{$array[0]};

 

[stillflame]

it's all very touchy syntax.

ok... each element of the array is a reference to a hash, so there is hash reference at:[tt]
$array[0][/tt]
and there's a hash:[tt]
%{$array[0]}[/tt]
and a hash element:[tt]
${$array[0]}{KEY}[/tt]
so it's like every time you would write the name of a hash variable(not any of the '%'s or '$'s.), you write out '{$array[0]}'. then you make sure the other characters are all well placed.
to assign it to a temporary array, you'd do:[tt]
my %temp = %$array[0];[/tt]

another syntax is with '->', and would go:
$array[0] (hash ref)
$array[0]->{KEY} (hash element)
this is easier to keep track of, but a little harder on the grasping conceptually part (in my opinion). "If you think you're too small to make a difference, try spending a night in a closed tent with a mosquito."