> On Jan 11, 2019, at 12:41 PM, ToddAndMargo via perl6-users
> <perl6-us...@perl.org> wrote:
>
> Hi All,
>
> How do I do a hash inside a hash?
>
> So far I have:
>
> $ p6 'my %Vendors=("acme" => ( "ContactName" => "Larry, "AccountNo" => 1234 )
> ); say %Vendors;'
> ===SORRY!=== Error while compiling -e
>
>
> I want to be able to have both a Contact Name and and AccountNo
> associated with each key in %Vendors.
>
>
> Many thanks,
> -T
First, you need a double-quote after `Larry` (before the comma) to fix the
syntax error:
perl6 -e 'my %Vendors=("acme" => ( "ContactName" => "Larry",
"AccountNo" => 1234 ) ); say %Vendors;'
At this point, you have a Hash of List of Pairs. To change it into a Hash of
Hashes, change the inner parens to curly braces:
perl6 -e 'my %Vendors=("acme" => { "ContactName" => "Larry",
"AccountNo" => 1234 } ); say %Vendors; say %Vendors<acme><AccountNo>;'
Those inner parens were acting as an anonymous list constructor, but you needed
an anonymous *hash* constructor, which is what the curly braces do (when they
are not doing their code-block-ish job).
You could have also used `Hash(…)` or `%(…)` instead of `{…}`, but `{…} is
shortest, and most traditional from Perl 5.
—
Hope this helps,
Bruce Gray (Util of PerlMonks)
