Solutions:
Note that for a few exercises multiple solutions are given.
[1] |
$foo = *x;
[2] |
*foo = \substr $x, 0;
*foo = \vec $x, 0, 8;
[3] |
BEGIN { $^H |= 0x30000; $^H{qr} = sub{""} }
[4] |
*foo = qr/IO::Handle/;
[5] |
*foo = find PerlIO::Layer "raw";
[6] |
*foo = sub{\@_}->($x, $x);
[7] |
*foo = \42;
[8] |
*foo = sub{\@_}->(${*STDIN{IO}});
sub DB::DB { die if ++$x==2 } BEGIN { $^P |= 0x22 }
[9] |
$foo = "\n0"; $* = 1;
[10] |
//; *foo = \$+[0];
[11] |
*@ = *|; eval { die "2" };
[12] |
2 =~ /(2)/; *| = \local $1;
2 =~ /(2)/; *| = *^N;
$[ = 2; *| = *[;
[13] |
&Internals::SvREADONLY(\undef, 0); undef = 42;
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