From: Chad Perrin <code@...>
Date: 2011-04-08T02:08:07+09:00
Subject: Re: String.gsub with regex and block

--jho1yZJdad60DJr+
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

On Fri, Apr 08, 2011 at 12:36:23AM +0900, Reid Thompson wrote:
> On Fri, 2011-04-08 at 00:25 +0900, Alexey Petrushin wrote:
> > "John Smith".gsub /(.+)\s(.+)/ do |name, family|
> >       p [name, family]
> >=20
> >       # instead of this
> >       p [$1, $2]
> >     end=20
> is it a requirement that you use gsub?
>=20
> irb(main):008:0> name, family =3D "John Smith".split
> =3D> ["John", "Smith"]
> irb(main):009:0> p [name, family]
> ["John", "Smith"]
> =3D> nil

This solution is not very generalizable.  It only works as presented for
cases where all the stuff you want to discard looks the same.  I wouldn't
want to have to deal with this kind of thing for a particularly complex
case:

    str =3D 'John Smith: A Good Man -- A Good Husband.  RIP (1976)'.split

    first, *remainder =3D str.split

    last, *non_name =3D remainder.split(': ')

    desc1, *the_rest =3D non_name.split(' -- ')

    desc2, *deceased =3D the_rest.split('.  ')

=2E . . so, is there some way to use more descriptive variable names than
the default $1, $2, et cetera, for captures from within a regex?  I'm not
aware of any, but I too would find that agreeable.

--=20
Chad Perrin [ original content licensed OWL: http://owl.apotheon.org ]

--jho1yZJdad60DJr+
Content-Type: application/pgp-signature
Content-Disposition: inline

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.14 (FreeBSD)

iEYEARECAAYFAk2d67MACgkQ9mn/Pj01uKW2NwCfYHzCTUkUphCLButy5QsLDold
M48AoKbmpqhKz600eXXxhb7++JZm8ZjL
=pwH+
-----END PGP SIGNATURE-----

--jho1yZJdad60DJr+--