From: Eero Saynatkari <ruby-ml@...>
Date: 2006-10-13T01:15:13+09:00
Subject: Re: scanning strings, backward?

--I3tAPq1Rm2pUxvsp
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

On 2006.10.12 23:20, Rick DeNatale wrote:
> On 10/11/06, Eero Saynatkari <ruby-ml@kittensoft.org> wrote:
> >On 2006.10.11 20:05, Bil Kleb wrote:
> >> Hi,
> >>
> >> I would like to automate a code cleanup task which involves
> >> finding warning messages like,
> >>
> >>  Warning: ../../LibF90/bc_inviscid.f90, line 1707:
> >>   DT explicitly imported into BC_INVISCID_FLUX but not used
> >>  detected at BC_INVISCID_FLUX@<end-of-statement>
> >>
> >> and removing the offending unused import.
> >>
> >> So, the tasks are roughly,
> >>
> >>  1) Goto line 1707 of the file
> >
> >File.readlines for reasonably sized files, f.each_with_index
> >for skipping over until 1707.
> >
> >>  2) Search backward until line.match /\Wdt\W/i
> >>  3) Remove /dt/i
> >
> >Combine these by anchoring.
> >
> >  line.sub /(.*\W)dt(\W.*)$/i, '\1\2'
> >
> >If the \W are spaces, strip one of them out.
>=20
> I believe that the OP doesn't want to search line 1707 backwards for
> dt, he want's to search the file backwards starting at line 1707 (or
> maybe 1706) for a line containing dt.

Ah! /m :D

Granted in that case it would be simplest to use #rindex or to reverse
the String altogether.=20

--I3tAPq1Rm2pUxvsp
Content-Type: application/pgp-signature
Content-Disposition: inline

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.5 (FreeBSD)

iD8DBQFFLml97Nh7RM4TrhIRAhNwAJ0SjNn7qwAf0VqR+ttBJdBDm+A4fQCdGi3j
4JDK2TnHwnppnxCouQdSHp4=
=2yCJ
-----END PGP SIGNATURE-----

--I3tAPq1Rm2pUxvsp--