Challenge 3: Sort an Array of Hashrefs by Name — Possible Solution
====================================================================

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

my @people = (
    { name => "Ada",  age => 28 },
    { name => "Alan", age => 41 },
    { name => "Grace", age => 36 },
);

my @sorted_names = map { $_->{name} } sort { $a->{name} cmp $b->{name} } @people;

say "@sorted_names";

Output:
Ada Alan Grace

WHY THIS WORKS AS AN ANSWER
------------------------------
@people is reused completely unchanged from the chapter's own
example, an array of anonymous hashrefs (Course 1, Chapter 9).

sort { $a->{name} cmp $b->{name} } @people reuses the chapter's own
sort-by-field pattern directly — structurally identical to the
chapter's own sort { $a->{age} <=> $b->{age} } @people example, but
swapping <=> (numeric comparison, Course 1, Chapter 5) for cmp
(STRING comparison, also Course 1, Chapter 5) since name holds text,
not a number — using <=> on strings here would trigger the exact
numeric-coercion gotcha Course 1, Chapter 5's own warn-box covered.

map { $_->{name} } ... reuses the chapter's own extraction step from
its chained-pipeline example, pulling just the name field back out of
each now-sorted hashref — since $_ inside map refers to each element
of whatever list map is applied to (here, the already-sorted array of
hashrefs), $_->{name} correctly retrieves each person's name in
sorted order.

The final result, "Ada Alan Grace", confirms alphabetical ordering by
name — Ada before Alan before Grace — rather than the age-based order
the chapter's own original example would have produced from the same
underlying data.