If I'm right, you've got some string which parses out into an ID, then a series of fields. You want to create a hash with key of ID and value being some hashref, pointing to a hash with key of name/email/etc and value being the value.
The basic code for this would be something like:
($ID,$name,$email,$title,$date,...) = /(ID)(name)(email)(title)(date)(
+...)/;
$hash{$ID}{name} = $name;
$hash{$ID}{email} = $email;
...
Now, what you're doing is, essentially, assigning a hash slice. Now, if you don't know, a hash slice is done something like:
my @keys = ('a', 'b', 'c');
my @vals = (1, 2, 3);
my %hash;
@hash{@keys} = @vals;
At this point, $hash{a} == 1, etc.
For a hash of hashes, I think the syntax is something like:
my @keys = ('a', 'b', 'c');
my @vals = (1, 2, 3);
my %hash;
@($hash{key}}{@keys} = @vals;
But, please test this out.
To marry this with the code you have right now, I'd do something like:
my @keys = ('name', 'email', 'title', ...);
($ID, @vals) = /(ID)(name)(email)(title)(date)(...)/;
@{$hash{$ID}}{@keys} = @vals;
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