Or, avoiding full grep:
my $contains = sub { $_ eq $_[1] && return 1 for @{$_[0]}; 0 };
for (qw( Lisa Bart Fred LanX )) {
[qw( Fred Wilma Barney Betty )]->$contains($_) and print;
}
Though efficiency probably shouldn't enter the discussion here. Performing a key search on array, where you could have used a hash—bad decision. Another reason to dislike the smartmatch: it promotes bad design.
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