Challenge 2: An Array of Hashes — Possible Solution
====================================================================

use strict;
use warnings;
use feature 'say';

my @products = (
    { name => "Widget", price => 19.99 },
    { name => "Gadget", price => 34.50 },
    { name => "Gizmo",  price => 9.95 },
);

foreach my $product (@products) {
    say "$product->{name}: \$$product->{price}";
}

Output:
Widget: $19.99
Gadget: $34.50
Gizmo: $9.95

WHY THIS WORKS AS AN ANSWER
------------------------------
Each { name => ..., price => ... } reuses the chapter's own anonymous-
hash-reference syntax exactly — curly braces build a brand-new hash
reference directly inline, with no separately-declared %hash variable
needed for each product, exactly the "standard way real code
constructs nested structures" the chapter describes.

@products is then a plain array (Chapter 3) whose three elements are
each one of those hashrefs — this is the chapter's own "array of
hashes" shape, applied to products instead of people.

foreach my $product (@products) reuses ordinary array iteration
(Chapter 3), and "$product->{name}" inside the interpolated string
reuses the chapter's own arrow-dereference syntax to pull the name
and price back out of each hashref — this works directly inside
double-quoted string interpolation, per Chapter 2's own interpolation
rules, without needing to break the expression out of the string
first.

\$ inside the string is required per Course 1, Chapter 2's own
escaping rule — since $ normally triggers interpolation, a literal
dollar sign in the output ("$19.99") needs the backslash to print as
itself rather than being read as the start of a variable reference.