UNIX下perl实现代码

				#!./perl								BEGIN {				    chdir 't' if -d 't';				    @INC = '../lib';				}								print "1..4\n";								print "not " unless reverse("abc")    eq "cba";				print "ok 1\n";								$_ = "foobar";				print "not " unless reverse()         eq "raboof";				print "ok 2\n";								{				    my @a = ("foo", "bar");				    my @b = reverse @a;								    print "not " unless $b[0] eq $a[1] && $b[1] eq $a[0];				    print "ok 3\n";				}								{				    # Unicode.								    my $a = "\x{263A}\x{263A}x\x{263A}y\x{263A}";				    my $b = scalar reverse($a);				    my $c = scalar reverse($b);				    print "not " unless $a eq $c;				    print "ok 4\n";				}