From: Dominik Honnef <dominikho@...>
Date: 2009-03-04T00:09:00+09:00
Subject: Re: expanding environment variable

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On [Tue, 03.03.2009 23:58], Daniel Schoch wrote:
> Dominik Honnef wrote:
> > On [Tue, 03.03.2009 23:28], Daniel Schoch wrote:
> >> Hi,
> >>=20
> >> I have a string
> >> s =3D "$DIR/test/$FILE"
> >>=20
> >> Is there an easy way to expand this with the defined environment
> >> variables?
> > What do you mean by environment variables? The stuff in ENV, or the
> > constants like __FILE__ or simply global variables?
>=20
> I mean the stuff in ENV.
> SHELL:
> export DIR=3Dx
> export FILE=3Dy.z
>=20
> RUBY:
> I'd like to know the easiest way from
>  s =3D "$DIR/test/$FILE"
> to
>  s =3D "x/test/y.z"
>=20
>=20
| >>> DIR=3Dx FILE=3Dy.z irb
| >> s =3D "$DIR/test/$FILE".gsub(/\$\w+/) {|m| ENV[m[1..-1]]}
| =3D> "x/test/y.z"

Thats how I would do it.
--=20
Dominik Honnef
dominikho@gmx.net

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