Thanks for that, liverpole. I keep a copy on my hard disk, but...
This piece should really have been included into the FMTEYEWTK compilation - or wherever appropriate - on perl.org long ago. IIRC the FMTEYEWTK compilation is authored by Tom Christiansen, so I wonder why this particularly enlightening writing isn't included.
update: it looks like the ftp site ftp.perl.org is empty now. Tom Christiansens compilation can be found, at the moment (2011-05-27), at perl.com. Thanks for the hint, kennethk.
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