Date: Thu, 06 Jan 2011 09:49:40 +0000 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: freebsd-questions@freebsd.org Subject: Re: a perl question Message-ID: <4D259034.6020805@infracaninophile.co.uk> In-Reply-To: <20110105221538.26daeb0d@gumby.homeunix.com> References: <117654.42578.qm@web121409.mail.ne1.yahoo.com> <AANLkTinEksoXQAA4ZAziE59h%2BLRTxSgSy2WZy6UaQne%2B@mail.gmail.com> <4D231CB7.2060902@teambox.fr> <86pqsc3774.fsf@red.stonehenge.com> <20110105062401.GB74123@guilt.hydra> <20110105160514.GA94459@libertas.local.camdensoftware.com> <20110105221538.26daeb0d@gumby.homeunix.com>
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On 05/01/2011 22:15, RW wrote:
> Personally I find that using cat makes things simpler and less error
> prone when reusing pipelines in shell history.
>=20
> For example it's easier to edit=20
>=20
> cat file | foo
>=20
> into=20
> =20
> cat file | bar | foo
> or cat file? | foo
>=20
> than editing=20
>=20
> foo < file
>=20
> into
>=20
> bar < file | foo
> or cat file? | foo
Little known factoid -- shell redirections can occur *anywhere* on the
command line.
% > foo cat
abcdefghijklmnopqrstuvwxyz
% < foo tr 'a-z' 'm-za-l'
mnopqrstuvwxyzabcdefghijkl
Cheers,
Matthew
--=20
Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard
Flat 3
PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate
JID: matthew@infracaninophile.co.uk Kent, CT11 9PW
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