Sometimes it's useful to let Perl tell you what it thinks about the code you give it to execute (e.g., "where does the fourth lineread come from?"):
>perl -MO=Deparse -ne
"$s=<>;<>;<>;chomp($s);print length($s).\"\n\";
"
LINE: while (defined($_ = <ARGV>)) {
$s = <ARGV>;
<ARGV>;
<ARGV>;
chomp $s;
print length($s) . "\n";
}
-e syntax OK
Use -MO=Deparse,-p for even gorier details. See B::Deparse and O.
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