From: Chad Perrin <perrin@...>
Date: 2008-11-16T04:08:58+09:00
Subject: Re: IO#lineno= doesn't work the way I expected

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On Sun, Nov 16, 2008 at 02:27:45AM +0900, Tim Hunter wrote:
>=20
> The way I read the ri doc for lineno=3D, it appears that all it does is=
=20
> determine the value that lineno returns the next time you call it. That=
=20
> is, it doesn't move the read position in the file.

I think you're confusing lineno=3D with lineno (which are two separate
methods).  IO#lineno does this:

    ios.lineno
    =3D> 0

IO#lineno=3D does this:

    ios.lineno =3D 3
    =3D> 3

The class is specced here, with the screen scrolled to where IO#lineno
and IO#lineno=3D are listed:

    http://ruby-doc.org/core/classes/IO.html#M002289


>=20
> I think what you're looking for is IO#seek, but notice that it seek=20
> doesn't operate on lines, only on byte offsets.

That would make IO#seek not what I want, unfortunately.  Line lengths are
not known in advance.

--=20
Chad Perrin [ content licensed PDL: http://pdl.apotheon.org ]
Quoth Larry Wall: "You can never entirely stop being what you once were.
That's why it's important to be the right person today, and not put it
off till tomorrow."

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