Question

I saw in some code a declaration like:

$test  = "test";
$test1 = "tes2";
$i     = 2;
$var{$test}{$test1}{"cnt"}[$i] = $var_val;    # What exactly is this?

If they mention the { brace, that is concatenation. I really not understand what this is.

My guess is that the final variable is like $vartesttest1cnt2.

Answer 1

Well, no, not really. %var is a hash of hashes of hashes of arrays.

%var is a hash

$var{$test} => $var{"test"} is a hash

$var{$test}{$test1} => $var{"test"}{"tes2"} is a hash

$var{$test}{$test1}{"cnt"} => $var{"test"}{"tes2"}{"cnt"} is an array

$var{$test}{$test1}{"cnt"}[$i]=$var_val assigns $var_val to index 2 in the array