関数の中の関数
言語を選ぶ基準 - lethevert is a programmer
sub f { my $x = shift; my $g = sub { my $y = shift; $x + $y }; my $h = sub { my $x = shift; $g->(10) }; $h; } print f(10)->(1), "\n";
$ perl hoge.pl 20
これでも大丈夫みたい
sub f { my $x = shift; sub g { my $y = shift; $x + $y }; sub h { my $x = shift; g(10) }; \&h; } print f(10)->(1), "\n";
$ perl fuga.pl 20
あまり使うことはなさそうだけども